Review Article | Open Access
A. K. M. Moyeenul Huq, Jamia Azdina Jamal, Johnson Stanslas, "Ethnobotanical, Phytochemical, Pharmacological, and Toxicological Aspects of Persicaria hydropiper (L.) Delarbre", Evidence-Based Complementary and Alternative Medicine, vol. 2014, Article ID 782830, 11 pages, 2014. https://doi.org/10.1155/2014/782830
Ethnobotanical, Phytochemical, Pharmacological, and Toxicological Aspects of Persicaria hydropiper (L.) Delarbre
Persicaria hydropiper (L.) Delarbre, belonging to Polygonaceae family, is a common weed found in most of the temperate countries including Bangladesh, China, Malaysia, and Japan. The plant is also referred to as “marsh pepper” or “smart weed.” It appears to be a useful herb with evidence-based medicinal properties. The present work addresses the botanical description, traditional uses, phytochemistry, pharmacology, and toxicology of P. hydropiper. All plant parts have been commonly used in the traditional systems of medicines. Flavonoids are the major group of phytochemical components followed by drimane-type sesquiterpenes and sesquiterpenoids, as well as phenylpropanoids. Different extracts and plant parts showed remarkable pharmacological activities including antioxidant, antibacterial, antifungal, antihelminth, antifeedant, cytotoxicity, anti-inflammatory, antinociceptive, oestrogenicity, antifertility, antiadipogenicity, and neuroprotection. Mutagenicity and acute and subchronic toxicities of the plant were also reported. P. hydropiper has tremendous medicinal properties that could further be investigated for the development of evidence-based herbal products.
1. Plant Botanical Description and Distribution
Persicaria hydropiper (L.) Delarbre belongs to the family of Polygonaceae. The synonyms for this species include Persicaria hydropiper (L.) Spach, P. hydropiper (L.) Opiz, P. hydropiper (L.) H. Gross, Polygonum hydropiper L., and P. hydropiper var. projectum Stanford [1–4]. The species is commonly known as marsh-pepper smartweed, marsh-pepper knotweed, smartweed, or water pepper [5–7] and is also called la liao in China , bishkatali or pakarmul in Bangladesh , and daun senahun in Malaysia .
Based on the information stated in the Flora of North America and Flora of China [4, 8], P. hydropiper is an annual plant of 40–70 cm tall. Briefly, it has a decumbent to ascending or erect branched and glabrous stem. The leaves are lanceolate or elliptic-lanceolate (4–10 × 0.4–2.5 cm) and glabrous with petiole (0.1–0.8 cm), cuneate base, acute to acuminate apex, ciliated margin, and sessile attachment with stipule. The terminal and axillary inflorescences (0.3–18.0 × 0.5–0.9 cm) are either erect or nodding with glabrous peduncle (0.1–0.5 cm), ascending pedicels, and 3–5 flowers. The flowers have greenish proximal and white or pink distal perianth, obovate tepals, 6–8 stamens, and 2-3 styles.
P. hydropiper is distributed worldwide and found native in temperate and tropical Asia including Western Asia, Caucasus, Siberia, Middle Asia, Russian Far East, China, Eastern Asia, Indian Subcontinent, Indo-China, and Malesia; Europe region such as Northern Europe, Middle Europe, East Europe, Southeastern Europe, and Southwestern Europe; Northern Africa and Australia . The plant generally grows in wet areas at watersides and in marshes  and is usually predominant in agricultural fields . It is also commonly distributed to highland sites with highly organic, moist, or silty areas .
2. Traditional Uses
Persicaria hydropiper has a strong peppery taste and is commonly used as a hot-tasting spice, food flavor, and garnish for a variety of traditional dishes [15–17]. The Japanese people use the young shoot as spice and garnish with raw fish such as “sashimi” for its pungent taste , while the water or ethanol leaf extract served as a food additive to preserve pickles, dressing, and cooked foods . In Southeast Asia, the Chinese and Malays use the leaves in traditional laksa dishes .
Most importantly, P. hydropiper also has a wide range of traditional uses for medicinal purposes. In Europe, the plant has been used as diuretic and emmenagogue  and to regulate menstrual irregularities . In addition, decoction of the whole plant, either alone or mixed with other medicinal plants, is also given for diarrhea, dyspepsia, itching skin, excessive menstrual bleeding, and hemorrhoids . The leaves and seeds are used in a folk medicine against cancer . The Romanian people in Oltenia utilized infusion of the aerial part as astringent and cicatrising, as well as for gastric, pulmonary problems, and uterine hemorrhages . The use of bruised leaves and seeds as vesicants has also been reported .
In India, the Mishing women in Assam take the dried root powder of P. hydropiper for termination of pregnancy and it may lead to permanent sterility if taken continuously for more than a year [26, 27]. Leaf’s juice is consumed for uterine disorders . In Arunachal Pradesh, the whole plant extract and ground plant paste are used as fish poisons [28, 29], whereas the leaf infusion is used to relieve colic pain . The plant has also been utilized as natural dyes .
In Bangladesh, the Garo tribe uses the leaf juice for menstrual pain, the leaf paste to stop bleeding, and the whole plant as pesticide for stored grains . Another tribe of Tripura uses the mixture of crushed P. hydropiper leaf with black pepper for headache . In a district of Sylhet, the crushed plant helps to arrest hemorrhage and in Rema-Kalenga, the leaves are used for stomach pain . The leaf juice has been given for treating many health problems like headache, pain, toothache, liver enlargement, gastric ulcer, dysentery, loss of appetite, and dysmenorrhea, while the roots are used as stimulant and their juice is applied to wounds, skin diseases, and painful carbuncles .
In Vietnam, the stems and leaves are taken for snake-bite and as diuretic and anthelmintic . In China, the plant is consumed to prevent ovulation and cease pregnancy , while the root is used as stimulant, diuretic, carminative, tonic, and anthelmintic .
This plant has been found to be toxic to pigs and sheep .
3. Phytochemical Constituents
P. hydropiper has been reported to contain mainly flavonoids, sesquiterpenes, sesquiterpenoids, and phenylpropanoids (Table 1).
Various extracts and fractions of P. hydropiper whole plant and herbs were found to contain flavonoids, such as (+)-catechin, (−)-epicatechin, hyperin, isoquercitrin (Figure 1), isorhamnetin (Figure 1), kaempferol, quercetin (Figure 1), quercitrin, rhamnazin and rutin [39–41]; drimane-typed sesquiterpenes, such as 3-β-angeloyloxy-7-epifutronolide, 7-ketoisodrimenin, changweikangic acid A, dendocarbin L, (+)-fuegin, futronolide, polygonumate, and (+)-winterin ; phenylpropanoid esters, including hydropiperosides A and B (Figure 1), and vanicosides A (Figure 1), B and E ; as well as phenolic acids, such as caffeic acid, chlorogenic acid and ρ-coumaric acid .
Methanol (80–100%) extract of the leaves had mainly flavonoids, including apigenin-7-O-glucoside, galloyl kaempferol-3-O-glucoside, galloyl quercetin-3-O-glucoside, galloyl quercetin-3-O-rhamnoside, galloyl quercitrin (Figure 1), isoquercitrin, isoquercitrin-3-glucoside, isorhamnetin, isorhamnetin-3,7-disulphate (Figure 1), kaempferol rutinoside, kaempferol-3-O-glucoside, percicarin/persicarin, quercitrin, quercetin (Figure 1), quercetin-3-O-glucoside, quercetin-3-O-β-D-glucuronide, quercetin-3-O-rhamnoside (Figure 1), quercetin-3-sulphate, rhamnazin, rhamnazin-3-sulphate, rhamnetin, scutillarein, tamarixetin-3-O-β-glucoside-7-sulphate, 3′-methylquercetin, 6-hydroxyluteolin, 6-hydroxyluteolin-7-O-β-D-glucopyranoside, 6-hydroxyapigenin, and 7,4′-dimethylquercetin (Figure 1) [16, 17, 44–46]; phenylpropanoids, such as hydropiperosides and vanicosides A, B, and D; and 3,5-dihydroxy-4-methoxybenzoic acid (Figure 1) . Additionally, the leaf diethyl ether extract was found to have sesquiterpenes and sesquiterpenoids, such as confertifolin (Figure 1), drimenol, (+)-fuegin, isodrimeninol, isopolygodial, isopolygonal, polygodial (Figure 1), polygodial acetal, polygonal, polygonic acid, polygonone, valdiviolide, warburganal (Figure 1), and 11-ethoxycinnamolide [18, 47], whereas the essential oil had acetic acid, confertifolin, diethyleneglycol monoacetate, ethyl benzene, ethyl propionate, and n-propyl acetate .
The methanol extract of stems and leaves was reported to contain hydropiperosides A and B and vanicosides A, B, and E , while the petroleum extract of top part had polygodial  and the methanol extract of roots had anthraquinone, ellagic acid 3,3′-di-O-methyl ether, gallic acid, hydropiperosides, and polygonolide (Figure 1) [50, 51]. Several sesquiterpenes and sesquiterpenoids, such as confertifolin, drimenol, isodrimeninol, isopolygodial, polygodial, polygonal and warburganal, have been isolated from diethyl ether extract of the seeds [18, 52]. (+)-catechin, (+)-epicatechin, and (+)-epicatechin-3-O-gallate were produced by the callus and suspension-cultured cells of P. hydropiper , whereas polygodial was detected in the shoot cultures .
4. Pharmacological Properties
Several reports on pharmacological properties of P. hydropiper are available to support the ethnomedicinal uses of the plant including antioxidant, antibacterial, antifungal, antihelminth, antifeedant, cytotoxicity, anti-inflammatory, antinociceptive, oestrogenicity, anti-fertility, anti-adipogenicity, anticholinesterase, and neuroprotection. Toxicological effects of P. hydropiper are also described.
4.1. Antioxidant Activity
Flavonoids are powerful antioxidants that can protect the human body from free radicals . Isoquercitrin and 7, 4′-dimethylquercetin isolated from the methanol extract of P. hydropiper leaves were found to inhibit lipid peroxidation using ferric thiocyanate (FTC) method with ID50 of 0.6 and 1.5 ppm, respectively . Yagi et al.  also studied the antioxidant activity of quercetin-3-sulphate, isorhamnetin-3,7-disulphate, and tamarixetin-3-glucoside-7-sulphate isolated from the methanol leaf extract. Amongst the sulphated flavonoids, isorhamnetin-3,7-disulphate gave the strongest inhibition against lipid peroxidation even compared to α-tocopherol and quercetin and the formation of superoxide anion and xanthine oxidase, compared to quercetin.
Peng et al.  investigated the antioxidant properties of 10 flavonoids isolated from the leaves of P. hydropiper, that is, quercitrin, kaempferol-3-glucoside, 6-hydroxyapigenin, galloyl kaempferol-3-glucoside, scutillarein, 6-hydroxyluteolin, 6-hydroxyluteolin 7-O-β-D-glucopyranoside, quercetin 3-O-β-D-glucuronide, galloyl quercitrin, and quercetin, showing Trolox equivalent antioxidant capacity (TEAC) values of 1.39–6.14 against 2,2′-azinobis(3-ethyl-benzothiazoline-6-sulphonic acid (ABTS) radicals. Galloyl quercitrin was the most powerful antioxidant found in the study (TEAC = 6.14) compared to quercitrin (TEAC = 3.46) and its aglycone, quercetin (TEAC = 4.65).
Hydropiperoides B and vanicoside A isolated from the P. hydropiper methanol leaf extract demonstrated antioxidant activity in 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical-scavenging assay with half maximal scavenging concentration (SC50) values of 23.4 and 26.7 μg/mL, respectively, compared to ascorbic acid (SC50 22.0 μg/mL) . Noor Hashim et al.  also reported the antioxidant activity of ethyl acetate fraction of methanol leaf extract against DPPH free radicals with IC50 value of 13.30 μg/mL, whereby the 3,5-dihydroxy-4-methoxybenzoic acid (IC50 8.08 μg/mL), quercetin (IC50 11.14 μg/mL), and quercetin-3-O-rhamnoside (IC50 18.46 μg/mL) were found to be most active as compared to vitamin C (IC50 6.80 μg/mL).
4.2. Antibacterial Activity
Confertifolin isolated from the leaf essential oil of P. hydropiper showed strong/good antibacterial activity against Enterococcus faecalis (MIC 31.25 μg/mL) as compared to a positive standard, streptomycin (MIC 25 μg/mL), but did not inhibit the growth of Bacillus subtilis, Erwinia sp., Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Staphylococcus aureus, and S. epidermidis . On the other hand, Kubo et al.  revealed that polygodial had moderate bactericidal action against Bacillus subtilis (minimum bactericidal concentration, MBC 100 μg/mL), Staphylococcus aureus (MBC 100 μg/mL), Escherichia coli (MBC 100 μg/mL), and Salmonella choleraesuis (MBC 50 μg/mL).
4.3. Antifungal Activity
Confertifolin isolated from the leaf essential oil was also found to have potent antifungal activity against Epidermophyton floccosum, Curvularia lunata, and Scopulariopsis sp. (MIC 7.81 μg/mL) and moderate activity against Aspergillus niger, Botrytis cinerea, Magnaporthe grisea, Trichophyton mentagrophytes, Trichophyton rubrum (MTCC 296 and clinical isolate) and Trichophyton simii (MIC 16.62–125 μg/mL) as compared to fluconazole (MIC < 12.5–100 μg/mL) and ketoconazole (MIC < 12.5 μg/mL) .
Polygodial was also reported to inhibit Candida albicans, C. utilis, C. krusei, Cryptococcus neoformans, Saccharomyces cerevisiae, Epidermophyton floccosum, Trichophyton mentagrophytes, T. rubrum, and Penicillium marneffei [57, 58]. It showed potent fungicidal activity against C. albicans . In another studies, polygodial isolated from Warburgia species and P. hydropiper showed fungicidal activity against S. cerevisiae [59, 60], via several mechanisms such as decreasing cytoplasmic and mitochondrial glutathione and increasing production of reactive oxygen species  and inhibition of mitochondrial ATPase [62, 63]. Later, Fujita and Kubo  revealed that polygodial, a nonionic surfactant, denatured the lipid-protein conformation of the cell membrane and interacted with L-cysteine containing cytoplasmic materials such as glutathione.
4.4. Anthelmintic Activity
Methanol (99%) extract of P. hydropiper aerial plant part (50 mg/mL) displayed anthelmintic activity against adult earthworms, Pheretima posthuma, in vitro with time of paralysis and death of 12.44 and 18.19 min, respectively, compared to the positive standard, piperazine citrate (10 mg/mL, time of paralysis = 24.00 min, time of death = 38.00 min) .
4.5. Antifeedant Activity
Hot water extract of P. hydropiper leaves (10% w/v) was significantly effective against the bean aphids, Aphis craccivora, with 87.6–94.5% mortality () 7 days after the application of spray at 227 L/ha .
Warburganal was previously reported to have strong antifeedant activity against African armyworms, Spodoptera exempta  and aphids . Polygodial was found to be active antifeedant against a variety of aphids (Aphis craccivora, Myzus persicae, and Rhopalosiphum padi), African or Egyptian cotton leafworm (Spodoptera littoralis), and whiteflies (Bemisia tabaci) [67–70].
4.6. Cytotoxic Activity
Various fractions of P. hydropiper herb and root methanol extracts were tested for antiproliferative activity against cervical epithelial adenocarcinoma (HeLa), skin epidermoid carcinoma (A431), and breast epithelial adenocarcinoma (MCF7) cells; only hexane fraction of the root methanol extract (30 μg/mL) was found to inhibit HeLa cell proliferation (54.75% inhibition) . Polygodial exhibited cytotoxicity against Ehrlich ascites tumor cells and mouse lymphocytic leukemia-derived L1210 cells .
An in vivo study performed by Raihan et al.  showed that the methanol (99%) extract of P. hydropiper aerial part had antiproliferative activity against Ehrlich Ascites Carcinoma (EAC) cells inoculated intraperitoneally (i.p.) in Swiss-Webster albino male mice. The extract at a dose of 50 mg/kg/day (i.p.) significantly () inhibited (84.54%) EAC cell growth, decreased tumor weight to 7.85 g, and improved mean survival time (68.0% increase of life span) of EAC bearing mice, as compared to the positive standard, bleomycin (0.3 mg/kg, i.p.) with values of 98.55%, 7.05 g, and 94.66%, respectively.
4.7. Anti-inflammatory Activity
Methanol (99%) leaf extract of P. hydropiper inhibited production of inflammatory mediators in vitro such as nitric oxide (NO), tumor necrosis factor (TNF)-α, and prostaglandin (PG) E2 in lipopolysaccharide-induced RAW264.7 cells and peritoneal macrophages by suppressing the activation of Src/Syk/NF-kB and IRAK/AP-1/CREB pathways .
Furuta et al.  demonstrated the anti-inflammatory property of polygonolide isolated from methanol extract of P. hydropiper root by inhibiting reversed passive Arthus reaction. A dose of 100 mg/kg polygonolide administered orally 1 hour before induction of inflammation on the rat skin was able to inhibit 39.2% () of the acute inflammation.
Polygodial, a major compound previously isolated from the barks of Drimys winteri, was reported to be responsible for inhibiting guinea-pig ileum and tracheal contractility in vitro induced by several mediators associated with asthmatic and allergic responses, including acetylcholine, histamine, bradykinin, KCl, 9,11-dideoxy-9α, 11α-methano-epoxy prostaglandin F2α, substance P, and tachykinin NK2 receptor . It also showed inhibitory effect of ovalbumin-sensitized and compound 48/80-stimulated contraction of guinea-pig trachea . da Cunha et al.  revealed that polygodial had anti-inflammatory and antiallergic properties in vivo via various mechanisms of actions including inhibition of mice paw oedema induced by prostaglandin E2 (ID50 107 μmol/kg at 180 min), bradykinin (ID50 86 μmol/kg at 60 min), substance P (ID50 83 μmol/kg at 180 min), dextran (ID50 17 μmol/kg at 60 min), platelet activating factor (58% inhibition at 60 min), carrageenan (ID50 32 μmol/kg), and ovalbumin (80% inhibition at 240 min); mice ear oedema was stimulated by arachidonic acid (ID50 141.3 μmol/kg), capsaicin (ID50 169 μmol/kg), and croton oil (44% inhibition), pleurisy was induced by substance P and histamine, and anaphylactic shock was stimulated by ovalbumin.
4.8. Antinociceptive Activity
Ethyl acetate extract of P. hydropiper whole plant exhibited significant dose-dependent antinociceptive activity in Swiss albino mice (42.86% inhibition at 250 mg/kg and 54.95% at 500 mg/kg, ) as compared to aminopyrine (73.62% at 50 mg/kg) by acetic acid-induced writhing method, suggesting its analgesic potential .
Mendes et al.  isolated polygodial from the barks of D. winteri and found that it (0.1 to 10 mg/kg, administered by intraperitoneal injection) was able to inhibit mice abdominal contractions induced by acetic acid (ID50 0.8 mg/kg), zymosan (ID50 2.1 mg/kg,) and kaolin (ID50 2.6 mg/kg). Polygodial also demonstrated distinct systemic, spinal, and supraspinal antinociceptive effect on mice, mainly preventing the formalin- and capsaicin-induced neurogenic pain, via several mechanisms including binding to the k and d subtypes of opioid receptors, activation of pertussis toxin-sensitive Gi/Go-protein, binding to α1-adrenoceptors and serotoninergic system . Neurogenic antinociceptive and thermal antihyperalgesic effects were observed in neonatal treatment of rats .
4.9. Oestrogenic and Antifertility Activity
Garg et al.  first reported the antifertility activity of ethanol extract of P. hydropiper root on female albino rats. Recently, the methanol root extract administered orally to ovary-intact and ovariectomized adult albino rats at a dose of 1000 mg/kg body weight/day for three consecutive oestrous cycles (12 days) was found to induce endometrial proliferation and follicular growth that was evidenced by the regulation of endometrial protein expression, suggesting its oestrogenic property comparable to estradiol-17β [26, 81]. Further investigations have demonstrated that the steroid-containing fraction of P. hydropiper methanol root extract, administered subcutaneously at a dose of 5 mg/kg/day, stimulated proliferation of uterine epithelium of ovariectomized adult albino rats . The fraction also stimulated expression of various uterine proteins in ovary intact (molecular weight ≈150000, ≈90000, ≈82000, ≈56000, ≈43000, and ≈38000) and ovariectomized (≈38000) rats but reduced expression of proteins (≈65000 and ≈38000) in pregnant rats of 5-6 days after implantation . The latter was indicated by the suppressed expression of estrogen-sensitive transforming growth factor-βI in the primary decidual zone of the implantation sites during day 6 of gestation, suggesting the antifertility activity .
4.10. Antiadipogenic Activity
Methanol extract of P. hydropiper whole plant (1 μg/mL) and its flavonol components, isoquercitrin (50 μM) and isorhamnetin (50 μM), were shown to activate the Wnt/β-catenin signaling in HEK 293 cells containing pTOPFlash reporter gene, increase nuclear localization of β-catenin in 3T3-L1 adipocyte cells, and inhibit adipocyte differentiation, suggesting its potential application as antiobesity agents and for associated disorders .
4.11. Anticholinesterase Activity
Cholinesterase assays using acetylcholinesterase and butyrylcholinesterase enzymes were conducted on P. hydropiper. However, the methanol extract, fractions (hexane, dichloromethane, ethyl acetate, butanol, and aqueous) and changweikangic acid A did not exhibit anticholinesterase activity [17, 42].
4.12. Neuroprotective Activity
Persicarin was discovered as a component of the P. hydropiper methanol leaf extract . As a matter of fact, Ma et al.  reported that persicarin isolated from the stems and leaves of Oenanthe javanica demonstrated significant neuroprotective activity (40.8–74.5% protection at 10.0 μM, ) in glutamate-induced neurotoxicity of rat cortical cells by inhibition of intracellular calcium influx, intracellular nitric oxide production, and cellular peroxide formation, as well as by increasing the antioxidant activities of superoxide dismutase, glutathione reductase, and glutathione peroxidase. Depending on the amount of persicarin in P. hydropiper, its extract could potentially possess neuroprotective activity.
Kuroiwa et al.  stated that the P. hydropiper ethanol leaf fraction containing 7.0% polygodial gave positive mutagenicity in two tests, that is, the Ames test using Salmonella typhimurium TA 100 and TA 98 and the chromosomal aberrations using Chinese hamster-derived CHL/IU cells, but it was negative for micronuclei in mouse bone marrow cells. It was also previously reported that polygodial was negatively mutagenic in the Ames test using TA 100, TA 98, and TA 2637 strains of S. typhimurium  and in the mammalian cell V79/HGPRT assay .
Acute toxicity in Swiss-Webster albino male mice was conducted by Raihan et al. , in which methanol (99%) extract of P. hydropiper aerial part (20–600 mg/kg) was injected intraperitoneally. After 24 hours, no mortality was observed up to 400 mg/kg, but 100% mice died at 600 mg/kg, suggesting the LD50 of the extract to be 500 mg/kg (i.p.).
Kuroiwa et al.  also investigated the subchronic toxicity of WPE in male and female F344/DuCrj rats given ad libitum for 13 weeks. The no observed-adverse effect was found with 1000 ppm ethanol leaf fraction containing 7.0% polygodial (57.4 and 62.9 mg/kg/day for males and females, resp.), whereby there were no obvious clinical signs and no significant changes in food consumption, hematology and serum biochemistry, body and organ weights, and histopathology of organs of the tested rats.
The aerial parts cause blister of the skin upon repeated handling that could be due to the skin irritant polygodial [49, 88]. Polygodial isolated from the bark of D. winteri was found to increase extracellular glutamate concentrations via concurrently inhibiting glutamate uptake by rat astrocytes and slices of cortex, striatum, and hippocampus and increasing glutamate release by synaptosomes, suggesting possible neurotoxic effect of polygodial .
The numerous ethnobotanical uses of P. hydropiper had drawn the attention of the scientists to investigate its traditional claims. The above discussion clearly gives us a perception on the scientific evidence of different pharmacological properties of this species which supports a number of its traditional uses such as antibacterial, antifungal, antihelminth, antifeedant, anticancer, anti-inflammatory, antinociceptive, oestrogenicity and antifertility uses. The antiallergic, antiadipogenic, and neuroprotective properties of the plant provided new knowledge on the extension of its uses. The plant contained several remarkable pharmacologically active compounds; for example, polygodial was found to have antibacterial, antifungal, antifeedant, anti-inflammatory, antinociceptive, and antiallergic properties; polygonolide had anti-inflammatory activity. Warburganal acted as antifeedant; confertifolin had antibacterial and antifungal activities; persicarin demonstrated neuroprotective activity; isoquercitrin, quercetin, quercetin-3-O-rhamnoside, 7,4′-dimethylquercetin, galloyl quercitrin, isorhamnetin-3,7-disulphate, 3,5-dihydroxy-4-methoxybenzoic acid, hydropiperoside B, and vanicoside A showed antioxidant properties, while isoquercitrin and isorhamnetin were antiadipogenic. Oral consumption of ethanol leaf fraction containing 7% polygodial was found to be safe in vivo. Thus, this plant serves as a promising candidate as a multipurpose herbal medicinal agent owing to its economical viability and being a reservoir of many significant medicinal properties in treating diseases and ailments related to microbial infections, inflammation, pain, allergy, uterine disorders, fertility, obesity, and improvement of memory.
Conflict of Interests
The authors declare that they have no conflict of interests regarding the publication of this paper.
The authors wish to thank Universiti Kebangsaan Malaysia (UKM) Zamalah and BKBP-FFAR-K009946 Grant from UKM for financial assistance.
- The International Plant Names Index, 2005, http://www.ipni.org/ipni/plantNameByVersion.do?id=123908-3&version=1.1.
- The Plant List, “A working list of all plant species,” 2013, http://www.theplantlist.org/.
- Australian Plant Name Index (APNI), Integrated Botanical Information System (IBIS). Australian National Botanic Gardens, Australian National Herbarium, January 2014, http://www.anbg.gov.au/cgi-bin/apni?taxon_id=39312.
- Flora of North America, “Persicaria hydropiper,” January 2014, http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242100096.
- Flora of Missouri, “Polygonum hydropiper,” January 2014, http://www.efloras.org/florataxon.aspx?flora_id=610&taxon_id=200006723.
- USDA, ““Polygonum hydropiper L. marshpepper knotweed,” January 2014, http://www.plants.usda.gov/core/profile?symbol=POHY.
- J. A. Duke, M. J. Bogenschutz-Godwin, J. duCellier, and P. A. K. Duke, Handbook of Medicinal Herbs, CRC Press, Boca Raton, Fla, USA, 2002.
- Flora of China, “Polygonum hydropiper,” January 2014, http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200006723.
- Ethnobotanical Database of Bangladesh (EDB) 3.1, “Taxonomic Information, Phyto-chemical Constituents & Traditional Uses of Plants,” January 2013, http://www.ethnobotanybd.com/index.php?action=Taxonomy&key=sci.
- I. H. Burkill, A Dictionary of the Economic Products of the Malay Peninsula, vol. 2, Ministry of Agriculture and Co-operatives, Kuala Lumpur, Malaysia, 1966.
- USDA, “GRIN taxonomy for plants, Taxon: Persicaria hydropiper (L.) Delarbre,” January 2014, http://www.ars-grin.gov/cgi-bin/npgs/html/tax_search.pl.
- D. T. Loi, The Glossary of Vietnamese Medicinal Plants and Items, Hanoi Medicine Publishing House, Hanoi, Vietnam, 2000.
- M. Miyazawa and N. Tamura, “Inhibitory compound of tyrosinase activity from the sprout of Polygonum hydropiper L. (Benitade),” Biological and Pharmaceutical Bulletin, vol. 30, no. 3, pp. 595–597, 2007.
- B. C. Das, P. K. Sarker, and M. M. Rahman, “Aphidicidal activity of some indigenous plant extracts against bean aphid Aphis craccivora Koch (Homoptera: Aphididae),” Journal of Pest Science, vol. 81, no. 3, pp. 153–159, 2008.
- D. V. Banthorpe, “Polygonum hydropiper L. (water pipper): In vitro culture and the production of the aphid-antifeedant polygodial,” in Medicinal and Aromatic Plant IV, Biotechnology in Agriculture and Forestry, Y. P. S. Bajaj, Ed., vol. 21, pp. 269–279, Springer, Berlin, Germany, 1993.
- Z. F. Peng, D. Strack, A. Baumert et al., “Antioxidant flavonoids from leaves of Polygonum hydropiper L,” Phytochemistry, vol. 62, no. 2, pp. 219–228, 2003.
- N. H. Noor Hashim, F. Abas, K. Shaari, and N. H. Lajis, “LC-DAD-ESIMS/MS characterization of antioxidant and anticholinesterase constituents present in the active fraction from Persicaria hydropiper,” LWT—Food Science and Technology, vol. 46, no. 2, pp. 468–476, 2012.
- Y. Fukuyama, T. Sato, Y. Asakawa, and T. Takemoto, “A potent cytotoxic warburganal and related drimane-type sesquiterpenoids from Polygonum hydropiper,” Phytochemistry, vol. 21, no. 12, pp. 2895–2898, 1980.
- Ministry of Health, Labour and Welfare, “List of existing food additives,” in Foods Food Ingred (Editorial), vol. 166, pp. 93–101, Japan, 1995, (Japanese).
- G. A. Stuart, Chinese Materia Medica, Vegetable Kingdom. Southern Materials Centre, Taipei, Taiwan, 1979.
- E. Blatter, J. F. Caius, and K. S. Mhaskar, Indian Medicinal Plants, Periodical Experts Book Agency, Vivek Vihar, India, 1998.
- A. Chevallier, The Encyclopedia of Medicinal Plants, Dorling Kindersley, London, UK, 1996.
- J. L. Hartwell, “Plants used against cancer. A survey,” Lloydia, vol. 33, no. 3, pp. 288–392, 1970.
- I. Tita, D. M. George, and G. T. Monica, “Ethnobotanical inventory of medicinal plants from the South-West of Romania,” Farmacia, vol. 57, no. 2, pp. 141–156, 2009.
- D. Moerman, Native American Ethnobotany, Timber Press, Oregaon, USA, 1998.
- A. Hazarika and H. N. Sarma, “The estrogenic effects of Polygonum hydropiper root extract induce follicular recruitment and endometrial hyperplasia in female albino rats,” Contraception, vol. 74, no. 5, pp. 426–434, 2006.
- P. Goswami, A. Hazarika, and H. N. Sarma, “Thin layer chromatographic fraction of root extract of Polgonum hydropiper induces vaginal epithelial cell maturation in adult ovariectomized albino rat,” Journal of Endocrinology Reproduction, vol. 12, no. 1, pp. 39–46, 2008.
- R. K. Choudhary, S. Oh, and J. Lee, “An ethnomedicinal inventory of knotweeds of Indian Himalaya,” Journal of Medicinal Plant Research, vol. 5, no. 10, pp. 2095–2103, 2011.
- N. D. Namsa, M. Mandal, S. Tangjang, and S. C. Mandal, “Ethnobotany of the Monpa ethnic group at Arunachal Pradesh, India,” Journal of Ethnobiology and Ethnomedicine, vol. 7, article 31, 2011.
- R. K. Choudhury and R. C. Srivastava, “IPR and traditional knowledge of Adi, Memba and Khamba tribes of upper siang distric, Arunachal Pradesh,” in The National Conference on IPR: Plant Varieties and Genome Conservation, K. Arvind, Ed., S.P. Mukharjee College, 2006.
- D. Mahanta and S. C. Tiwari, “Natural dye-yielding plants and indigenous knowledge on dye preparation in Arunachal Pradesh, northeast India,” Current Science, vol. 88, no. 9, pp. 1474–1480, 2005.
- M. Rahmatullah, I. J. Mukti, A. K. M. Fahmidul Haque et al., “An ethnobotanical survey and pharmacological evaluation of medicinal plants used by the Garo tribal community living in Netrakona district, Bangladesh,” Advances in Natural and Applied Sciences, vol. 3, pp. 402–418, 2009.
- S. Hanif Bari and M. Rahmatulla, “Medicinal plants of the santal tribe residing in rajshahi district, Bangladesh,” American-Eurasian Journal of Sustainable Agriculture, vol. 3, pp. 220–226, 2009.
- M. Yusuf, J. Begum, M. N. Hoque, and J. U. Chowdhury, Medicinal Plants of Bangladesh, Bangladesh Council of Scientific and Industrial Research, Dhaka, Bangladesh, 2009.
- A. Ghani, Medicinal Plants of Bangladesh: Chemical Constituents and Uses, Asiatic Society of Bangladesh, Dhaka, Bangladesh, 2nd edition, 1998.
- P. G. Xiao and N. G. Wang, “Can ethnopharmacology contribute to the development of anti-fertility drugs?” Journal of Ethnopharmacology, vol. 32, no. 1–3, pp. 167–177, 1991.
- J. A. Duke and E. S. Ayensu, Medicinal Plants of China, Reference Publications, Algonac, USA, 1985.
- K. Akamatsu, Wakanyaku, Ishiyakushuppan, Tokyo, Japan, 1970.
- K. S. Yusif and K. F. Blinova, “Flavonoid aglycones of Polygonum hydropiper,” Chemistry of Natural Compounds, vol. 20, no. 5, pp. 625–626, 1984.
- X. Yang, B. C. Wang, X. Zhang et al., “Simultaneous determination of nine flavonoids in Polygonum hydropiper L. samples using nanomagnetic powder three-phase hollow fibre-based liquid-phase microextraction combined with ultrahigh performance liquid chromatography-mass spectrometry,” Journal of Pharmaceutical and Biomedical Analysis, vol. 54, no. 2, pp. 311–316, 2011.
- M. A. Hawrył and M. Waksmundzka-Hajnos, “Two-dimensional thin-layer chromatography of selected Polygonum sp. extracts on polar-bonded stationary phases,” Journal of Chromatography A, vol. 1218, no. 19, pp. 2812–2819, 2011.
- R. Sultana, R. Hossain, A. Adhikari et al., “Drimane-type sesquiterpenes from Polygonum hydropiper,” Planta Medica, vol. 77, no. 16, pp. 1848–1851, 2011.
- P. V. Kiem, N. X. Nhiem, N. X. Cuong et al., “New phenylpropanoid esters of sucrose from Polygonum hydropiper and their antioxidant activity,” Archives of Pharmacal Research, vol. 31, no. 11, pp. 1477–1482, 2008.
- H. Haraguchi, K. Hashimoto, and A. Yagi, “Antioxidative substances in leaves of Polygonum hydropiper,” Journal of Agriculture and Food Chemistry, vol. 40, pp. 1349–1351, 1992.
- H. Haraguchi, I. Ohmi, S. Sakai et al., “Effect of Polygonum hydropiper sulfated flavonoids on lens aldose reductase and related enzymes,” Journal of Natural Products, vol. 59, no. 4, pp. 443–445, 1996.
- A. Yagi, T. Uemura, N. Okamura, H. Haraguchi, T. Imoto, and K. Hashimoto, “Antioxidative sulphated flavonoids in leaves of Polygonum hydropiper,” Phytochemistry, vol. 35, no. 4, pp. 885–887, 1994.
- Y. Fukuyama, T. Sato, I. Miura, and Y. T. Asakawa, “Drimane-type sesqui- and norsesquiterpenoids from Polygonum hydropiper,” Phytochemistry, vol. 24, no. 7, pp. 1521–1524, 1985.
- V. Duraipandiyan, F. Indwar, and S. Ignacimuthu, “Antimicrobial activity of confertifolin from Polygonum hydropiper,” Pharmaceutical Biology, vol. 48, no. 2, pp. 187–190, 2010.
- C. S. Barnes and J. W. Loder, “Structure of polygodial: a new sesquiterpene dialdehyde from Polygonum hydropiper,” Australian Journal of Chemistry, vol. 15, pp. 322–327, 1962.
- Y. Fukuyama, T. Sato, I. Miura, Y. Asakawa, and T. Takemoto, “Hydropiperoside, a novel coumaryl glycoside from the root of Polygonum hydropiper,” Phytochemistry, vol. 22, no. 2, pp. 549–552, 1983.
- T. Furuta, Y. Fukuyama, and Y. Asakawa, “Polygonolide, an isocoumarin from Polygonum hydropiper possessing anti-inflammatory activity,” Phytochemistry, vol. 25, no. 2, pp. 517–520, 1986.
- Y. Asakawa and T. Takemoto, “New norsesquiterpene aldehyde and sesquiterpene hemiacetal from the seed of Polygonum hydropiper,” Experientia, vol. 35, no. 11, pp. 1420–1421, 1979.
- K. Ono, M. Nakao, M. Toyota et al., “Catechin production in cultured Polygonum hydropiper cells,” Phytochemistry, vol. 49, no. 7, pp. 1935–1939, 1998.
- M. J. M. Hagendoorn, T. A. M. Geelen, T. A. van Beek, D. C. L. Jamar, F. A. A. Tetteroo, and L. H. W. van der Plas, “Occurrence of polygodial in plant organs and tissue culture of Polygonum hydropiper,” Physiologia Plantarum, vol. 92, no. 4, pp. 595–600, 1994.
- J. I. Sánchez-Gallego, A. López-Revuelta, J. L. Sardina, Á. Hernández-Hernández, J. Sánchez-Yagüe, and M. Llanillo, “Membrane cholesterol contents modify the protective effects of quercetin and rutin on integrity and cellular viability in oxidized erythrocytes,” Free Radical Biology and Medicine, vol. 48, pp. 1444–1454, 2010.
- I. Kubo, K.-I. Fujita, S. H. Lee, and T. J. Ha, “Antibacterial activity of polygodial,” Phytotherapy Research, vol. 19, no. 12, pp. 1013–1017, 2005.
- A. Malheiros, V. C. Filho, C. B. Schmitt et al., “Antifungal activity of drimane sesquiterpenes from Drimys brasiliensis using bioassay-guided fractionation,” Journal of Pharmacy and Pharmaceutical Sciences, vol. 8, no. 2, pp. 335–339, 2005.
- S. H. Lee, J. R. Lee, C. S. Lunde, and I. Kubo, “In vitro antifungal susceptibilities of Candida albicans and other fungal pathogens to polygodial, a sesquiterpene dialdehyde,” Planta Medica, vol. 65, no. 3, pp. 204–208, 1999.
- I. Kubo and M. Taniguchi, “Polygodial, an antifungal potentiator,” Journal of Natural Products, vol. 51, no. 1, pp. 22–29, 1988.
- M. Taniguchi, Y. Yano, E. Tada et al., “Mode of action of polygodial, an antifungal sesquiterpene dialdehyde,” Agricultural and Biological Chemistry, vol. 52, no. 6, pp. 1409–1414, 1988.
- K. Machida, T. Tanaka, and M. Taniguchi, “Depletion of glutathione as a cause of the promotive effects of polygodial, a sesquiterpene on the production of reactive oxygen species in Saccharomyces cerevisiae,” Journal of Bioscience and Bioengineering, vol. 88, no. 5, pp. 526–530, 1999.
- C. S. Lunde and I. Kubo, “Effect of polygodial on the mitochondrial ATPase of Saccharomyces cerevisiae,” Antimicrobial Agents and Chemotherapy, vol. 44, no. 7, pp. 1943–1953, 2000.
- M. V. Castelli, A. F. Lodeyro, A. Malheiros, S. A. S. Zacchino, and O. A. Roveri, “Inhibition of the mitochondrial ATP synthesis by polygodial, a naturally occurring dialdehyde unsaturated sesquiterpene,” Biochemical Pharmacology, vol. 70, no. 1, pp. 82–89, 2005.
- K.-I. Fujita and I. Kubo, “Multifunctional action of antifungal polygodial against Saccharomyces cerevisiae: involvement of pyrrole formation on cell surface in antifungal action,” Bioorganic and Medicinal Chemistry, vol. 13, no. 24, pp. 6742–6747, 2005.
- M. O. Raihan, M. Khalequeuzzaman, A. Brishti, S. M. Tareq, A. Hossain, and S. Rana, “Anthelmintic and Antiproliferative activity of aerial parts of Persicaria hydropiper,” Der Pharmasia Sinica, vol. 3, pp. 104–110, 2012.
- I. Kubo, Y.-W. Lee, M. Pettei, F. Pilkiewicz, and K. Nakanishi, “Potent army worm antifeedants from the east African Warburgia plants,” Journal of the Chemical Society, Chemical Communications, no. 24, pp. 1013–1014, 1976.
- Y. Asakawa, G. W. Dawson, D. C. Griffiths et al., “Activity of drimane antifeedants and related compounds against aphids, and comparative biological effects and chemical reactivity of (-)- and (+)-polygodial,” Journal of Chemical Ecology, vol. 14, no. 10, pp. 1845–1855, 1988.
- L. Moreno-Osorioa, M. Cortés, V. Armstrong, M. Bailén, and A. González-Coloma, “Antifeedant activity of some polygodial derivatives,” Zeitschrift Für Naturforschung C, A Journal of Biosciences, vol. 63, pp. 215–220, 2008.
- N. Zapata, F. Budia, E. Viñuela, and P. Medina, “Antifeedant and growth inhibitory effects of extracts and drimanes of Drimys winteri stem bark against Spodoptera littoralis (Lep., Noctuidae),” Industrial Crops and Products, vol. 30, no. 1, pp. 119–125, 2009.
- N. Prota, H. J. Bouwmeester, and M. A. Jongsma, “Comparative antifeedant activities of polygodial and pyrethrins against whiteflies (Bemisia tabaci) and aphids (Myzus persicae),” Pest Management Science, vol. 70, no. 4, pp. 682–688, 2013.
- I. Lajter, I. Zupkó, J. Molnár et al., “Antiproliferative activity of Polygonaceae species from the Carpathian Basin against human cancer cell lines,” Phytotherapy Research, vol. 27, no. 1, pp. 77–85, 2012.
- H. Anke and O. Sterner, “Comparison of the antimicrobial and cytotoxic activities of twenty unsaturated sesquiterpene dialdehydes from plants and mushrooms,” Planta Medica, vol. 57, no. 4, pp. 344–346, 1991.
- Y. Yang, T. Yu, H.-J. Jang et al., “In vitro and in vivo anti-inflammatory activities of Polygonum hydropiper methanol extract,” Journal of Ethnopharmacology, vol. 139, no. 2, pp. 616–625, 2012.
- M. El Sayah, V. Cechinel Filho, R. A. Yunes, T. R. Pinheiro, and J. B. Calixto, “Action of polygodial, a sesquiterpene isolated from Drymis winteri, in the guinea-pig ileum and trachea “in vitro”,” European Journal of Pharmacology, vol. 344, no. 2-3, pp. 215–221, 1998.
- F. M. da Cunha, T. S. Fröde, G. L. Mendes et al., “Additional evidence for the anti-inflammatory and anti-allergic properties of the sesquiterpene polygodial,” Life Sciences, vol. 70, no. 2, pp. 159–169, 2001.
- E. Rahman, S. A. Goni, M. T. Rahman, and M. Ahmed, “Antinociceptive activity of Polygonum hydropiper,” Fitoterapia, vol. 73, no. 7-8, pp. 704–706, 2002.
- G. L. Mendes, A. R. S. Santos, M. M. Campos et al., “Anti-hyperalgesic properties of the extract and of the main sesquiterpene polygodial isolated from the barks of Drymis winteri (Winteraceae),” Life Sciences, vol. 63, no. 5, pp. 369–381, 1998.
- G. L. Mendes, A. R. S. Santos, A. Malheiros, V. Cechinel Filho, R. A. Yunes, and J. B. Calixto, “Assessment of mechanisms involved in antinociception caused by sesquiterpene polygodial,” Journal of Pharmacology and Experimental Therapeutics, vol. 292, no. 1, pp. 164–172, 2000.
- E. Andre, J. Ferreira, Â. Malheiros, R. A. Yunes, and J. B. Calixto, “Evidence for the involvement of vanilloid receptor in the antinociception produced by the dialdeydes unsaturated sesquiterpenes polygodial and drimanial in rats,” Neuropharmacology, vol. 46, no. 4, pp. 590–597, 2004.
- S. K. Garg, V. S. Mathur, and R. R. Chaudhury, “Screening of Indian plants for antifertility activity,” Indian Journal of Experimental Biology, vol. 16, no. 10, pp. 1077–1079, 1978.
- A. Hazarika and H. N. Sarma, “Polygonum hydropiper crude root extract mimics estrogenic properties in females: evidence of uterine protein profiles studied by sodium dodecyl sulfate polyacrylamide gel electrophoresis,” Reproductive Medicine and Biology, vol. 5, no. 2, pp. 155–160, 2006.
- P. Goswami, A. Hazarika, and H. N. Sarma, “Root extract of Polygonum hydropiper alters the expression of rat uterine protein profile in presence and absence of ovary in-situ during periimplantation period: evidence on SDA-PAGE,” Journal of Reproduction and Contraception, vol. 20, no. 4, pp. 223–236, 2009.
- P. Goswami, A. Hazarika, and H. N. Sarma, “Chromatographic fraction of Polygonum hydropiper root modulates the expression of transforming growth factor-βI (TGF-βI) in rat uterus during days 2–6 of gestation,” Journal of Reproduction and Contraception, vol. 22, no. 3, pp. 153–167, 2011.
- S.-H. Lee, B. Kim, M. J. Oh et al., “Persicaria hydropiper (L.) spach and its flavonoid components, isoquercitrin and isorhamnetin, activate the Wnt/-βcatenin pathway and inhibit adipocyte differentiation of 3T3-L1 cells,” Phytotherapy Research, vol. 25, no. 11, pp. 1629–1635, 2011.
- C. J. Ma, K. Y. Lee, E. J. Jeong et al., “Persicarin from water dropwort (Oenanthe javanica) protects primary cultured rat cortical cells from glutamate-induced neurotoxicity,” Phytotherapy Research, vol. 24, no. 6, pp. 913–918, 2010.
- K. Kuroiwa, M. Shibutani, K. Inoue, K.-Y. Lee, G.-H. Woo, and M. Hirose, “Subchronic toxicity study of water pepper extract in F344 rats,” Food and Chemical Toxicology, vol. 44, no. 8, pp. 1236–1244, 2006.
- P. Morales, M. Andersson, L. Lewan, and O. Sterner, “Structure-activity relationships for unsaturated dialdehydes. 6. The mutagenic activity of 11 compounds in th V79/HGPRT assay,” Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis, vol. 268, no. 2, pp. 315–321, 1992.
- A. R. Clapham, T. Tutin, and E. F. Warburg, Flora of the British Isles, Cambridge University Press, Cambridge, UK, 1952.
- L. H. Martini, L. Cereser, I. Z. Junior et al., “The sesquiterpenes polygodial and drimanial in vitro affect glutamatergic transport in rat brain,” Neurochemical Research, vol. 31, no. 3, pp. 431–438, 2006.
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