Review Article

Medicinal Plants in the Prevention and Treatment of Colon Cancer

Table 2

(a) Efficacy of medicinal plants on colon cancer in in vivo models

Scientific nameParts usedModelDoseType of extractImportant compoundsCellular effectMechanismsReferences

Vitis viniferaSeedIn vivo (murine)Caco-2In vivo: 400–1,000 mg/kg
In vitro: 10–25 μg/mL
AqueousProcyanidins(i) Increased crypt depth and growth-inhibitory effects
(ii) Inhibited cell viability
(iii) Significantly decreased the histological damage score
Reduced MPO (myeloperoxidase) activity[180]
SeedIn vivoHT-29, SW4805 mg/kgAqueousNMNMDecreased VEGF, TNF, MMP-1, MMP-3, MMP-7, MMP-8, MMP-9, and MMP-13 protein expression[181]
SkinIn vivoNM7.5, 30, 60 μg/mLMethanolic4-Geranyloxyferulic acidNMNM[30]
SeedIn vivo (murine)NM0.12% NMCatechin, epicatechinNM(i) Suppressed proliferation, sphere formation, nuclear translocation of β-catenin and Wnt/β-catenin signaling
(ii) Elevated p53, Bax/Bcl-2 ratio, and cleaved PARP and mitochondrial-mediated apoptosis
[31]

Camellia sinensisLeafIn vivo (murine)HT-29In vitro: 0, 10, 30, 50 μM
In vivo: 1.5 mg per day
AqueousCatechin, epigallocatechin gallate1.9-fold increase in tumor endothelial cell apoptosisInhibited the ERK-1 and ERK-2 activation, VEGF expression, and VEGF promoter[182]
In vivo (murine)HCT1160.5%NMNMReduced basement membraneInhibition of MMP-9 and VEGF secretion[183]
In vivo (murine)Caco-2, HT-29300 μMAqueousTheaflavins (TF-2, TF-3, TF-1)Induced apoptosis of human colon cancer cellsInhibition of edema formation correlated to attenuation of COX-2 expression and promoter analysis revealed modulation of NFκB, AP-1, CREB, and/or NF-Il-6 (C/EBP)[36]
In vivo (murine)HT11525 μg/mLHydroethanolicPhenolic compounds (p-hydroxyphenyl ethanol, pinoresinol & dihydroxyphenyl ethanol)NMInhibition via reduced expression of a range of α5 & β1[184]

Sasa quelpaertensisLeafIn vivoHT-29, HCT1160, 100, 200, 300 mg/LEthanolicp-Coumaric acid, tricinInhibition of colony formation(i) Nonadherent sphere formation suppressed CD133+ & CD44+ population
(ii) Downregulated expression of cancer stem cell markers
[41]

AnoectochilusNMIn vivoCT26Oral dose of 50 & 10 mg/mouse per dayAqueousKinsenosideStimulated proliferation of lymphoid tissuesActivation of phagocytosis of peritoneal macrophages[185]

Purple-fleshed potatoesFruitIn vivoColon cancer stem cells5.0 μg/mLEthanol, methanol, ethyl acetateAnthocyanin, β-catenin, cytochrome cReduction in colon CSCs number and tumor incidence(i) Increase in cytochrome c levels from p53 status and maybe mitochondria-mediated apoptosis
(ii) Suppressed levels of cytoplasmic and nuclear β-catenin
[58]

Phaseolus vulgarisLeafIn vivoHT-29NmEthanolicPolysaccharides, oligosaccharidesInduction of apoptosis and inhibit proliferation(i) Inactivation of the retinoblastoma phosphoprotein
(ii) Induced G1 arrest
(iii) Suppression of NF-jb1
(iv) Increase in EGR1 expression
[59]

Rosmarinus officinalis L.LeafIn vivoHT-29SC-RE 30 μg/mL and CA 12.5 μg/mLEthanolicPolyphenols (carnosic acid (CA) and carnosol)(i) Activation of Nrf2 transcription factor
(ii) Activated common regulators, such as XBP1 (Xbp1) gene, SREBF1/SREBF2 (Srebp1/2), CEBPA and NR1I2 (Pxr) genes
LeafIn vivo (rat)NMNMEthanolicRosmanol and its isomers, carnosol, rosmadial, carnosic acid, and 12-methoxycarnosic acid, carnosic acid, carnosolInteractions with the gut microbiota and by a direct effect on colonocytes with respect to the onset of cancer or its progressionNM

Wasabia japonicaRhizomesIn vivoCOLO 2055 mg/mLMethanolic6-(Methylsulfinyl)hexyl isothiocyanateAnticolon cancer properties through the induction of apoptosis and autophagy(i) Activation of TNF-α, Fas-L, caspases
(ii) Truncated Bid and cytochrome c
(iii) Decreased phosphorylation of Akt and Mtor
(iv) Promoted expression of microtubule-associated protein 1 light chain 3-II and AVO formation
[186]

ZingiberaceaeRhizomeHT-29HT-295 g/kgDichloromethanicTurmeroneSuppressed the proliferation of HT-29 colon cancer cells(i) LDH release
(ii) ROS generation
(iii) Collapse in mitochondrial membrane potential
(iv) Cytochrome c leakage
(v) Activation of caspase 9 and caspase 3
[187]

Panax quinquefoliusRootIn vivo (murine)NM30 mg/kgEthanolicGinsenosides (protopanaxadiol or protopanaxatriol)Attenuated azoxymethane/DSS-induced colon carcinogenesis by reducing the colon tumor number and tumor load(i) Reduced experimental colitis
(ii) Attenuated on AOM/DSS-induced colon carcinogenesis
(iii) Proinflammatory cytokines activation
(iv) Suppressed DSS
(v) Downregulated inflammatory cytokine gene expression
[188]

MyrtaceaeLeafIn vivo (murine)HCT116100 μg/mL (in vitro) 200 and 100 μg/disc (in vivo)MethanolicPhenolics, flavonoids, betulinic acidInhibition of tumor angiogenesis(i) Inhibition of angiogenesis of tube formation on Matrigel matrix and HUVECS migration (in vitro)
(ii) Decreased nutrient and oxygen supply and consequently tumor growth and tumor size (in vivo)
(iii) Increased extent of tumor necrosis
[82]

Spica prunellaeLeafIn vivoHT-29200 mg/mL (in vitro), 600 mg/mL (in vivo)EthanolicRosmarinic acidInduction of apoptosis and inhibition of cell proliferation and tumor angiogenesis(i) Induced apoptosis
(ii) Inhibited cancer cell proliferation and angiogenesis STAT3 phosphorylation
(iii) Regulated expression of Bcl-2, Bax, cyclin D1, CDK4, VEGF-A, and VEGFR-2 (in vivo)
[83]

Gymnaster koraiensisAerial partIn vivo (murine)NM500 μmol/kgEthanolicGymnasterkoreaynes B, C, E, 2,9,16-heptadecatrien-4,6-dyne-8-olAnti-inflammatory and cancer preventive activities(i) Significant decrease in expression of COX-2
(ii) Increase in serum IL-6
[189]

Allium fistulosumEdible portionsIn vivo (murine)CT2650 mg/kg b.w.Hot waterp-Coumaric acid, ferulic acid, sinapic acid, quercitrin, isoquercitrin, quercetol, kaempferolSuppression of tumor growth and enhanced survival rate of test mice(i) Decreased expression of inflammatory molecular markers
(ii) Downregulated expression of MMP-9 and ICAM
(iii) Metabolite profiling and candidate active phytochemical components
[190]

Annona squamosa LinnLeafIn vivo (animal)HCT1168.98 μg/mLCrude ethyl acetateAcetogenins (annoreticuin & isoannoreticuin) and alkaloids dopamine, salsolinol, and coclaurine(i) Inhibited growth and proliferation of tumor cellsReactive oxygen species (ROS) formation, lactate dehydrogenase (LDH) release, and caspases 3/7, 8, 9 activation[191]

Eupatorium cannabinumAerial partsIn vivo (murine)HT-2925 μg/mLEthanolicPyrrolizidine alkaloids (senecionine, senkirkine, monocrotaline, echimidine)Cytotoxicity against colon cancer cells(i) Upregulation of p21 and downregulation of NCL, FOS, and AURKA, indicating reduced proliferation capacity
(ii) Mitotic disruption and nonapoptotic cell death via upregulation of Bcl-xL
[96]

Flacourtia indicaAerial partsIn vivo (murine)HCT116500 μg/mLMethanolicPhenolic glucoside (flacourticin, 4-benzoylpoliothrysoside)Antiproliferative and proapoptotic effects in HCT116 cellsApoptosis via generation of ROS and activation of caspases (PARP)[192]

Sorghum bicolorThe dermal layer of stalkIn vivo (murine)HCT116 & colon cancer stem cells>16 and 103 μg/mLPhenolic, acetoneApigeninidin & luteolinidinAntiproliferative effect(i) Target p53-dependent and p53-independent pathways[97]

Gleditsia sinensisThornIn vivo (murine)HCT116800 μg/mLAqueousFlavonoid, lupine acid, ellagic acid glycosidesInhibited proliferation of colon cancer(i) Increased p53 levels
(ii) Downregulation of the checkpoint proteins, cyclin B1, Cdc2, and Cdc25c
[90]
ThornIn vivo (murine)HCT116600 μg/mLEthanolicNMInhibitory effect on the proliferation of human colon cancer HCT116 cells(i) Caused G2/M phase cell cycle arrest[91]

Zingiber officinaleRhizomeIn vitro/in vivo (murine)HCT1165 μMEthanolic6-Paradol, 6- and 10-dehydrogingerdione, 6- and 10-gingerdione, 4-, 6-, 8-, and 10-gingerdiol, 6-methylgingerdiol, zingerone, 6-hydroxyshogaol, 6-, 8-, 10-dehydroshogaol, diarylheptanoidsInhibitory effects on the proliferation of human colon cancer cells(i) Arrest of G0/G1 phase
(ii) Reduced DNA synthesis
(iii) Induced apoptosis
[103]

Cucumaria frondosaThe enzymatically hydrolyzed epithelium of the edibleIn vivo (murine)HCT116<150 μg/mLHydroalcoholicMonosulphated triterpenoid glycoside frondoside A, the disulphated glycoside frondoside B, the trisulphated glycoside frondoside C(i) Inhibition at S and G2-M phase with a decrease in Cdc25c
(ii) Increase in p21WAF1/CIP
(i) Inhibition the growth of human colon
(ii) Apoptosis associated with H2AX phosphorylation and caspase 2
[105]

Rolandra fruticosaLeaf & twigsIn vivo (murine)HT-2910 and 5 mg/kg/dayMethanolicSesquiterpene lactone (13-acetoxyrolandrolide)Antiproliferative effect against human colon cancer cells(i) Inhibition of the NFκB pathway, subunit p65 (RelA) and upstream mediators IKKβ and oncogenic K-ras[106]

Cydonia oblonga MillerLeaf & fruitIn vivo (murine)Caco-2250–500 μg/mLMethanolicPhenolic compound (flavonol and flavone heterosides, 5-O-caffeoylquinic acid)Antiproliferative effect against human kidney and colon cancer cells(i) Suppression of NFκB activation, activator (AP-1), mitogen-activated protein kinases, namely, PKC, (GFR)-mediated pathways
(ii) Cell cycle arrest
(iii) Induction of apoptosis, antioxidant, and anti-inflammatory effects
[107]

Sedum kamtschaticumAerial partIn vivo (murine)HT-290–0.5 mg/mLMethanolicBuddlejasaponin IVInduced apoptosis in HT-29 human colon cancer cells(i) Induced apoptosis via mitochondrial-dependent pathway triggered by downregulation of Bcl-2 protein levels, caspase 3 activation, and subsequent PARP cleavage[109]

Ganoderma lucidumCaps & stalksIn vivo (murine)HT-290-0.1 mg/mLTriterpene extract (hot water) extractPolysaccharides (mainly glucans & glycoproteins), triterpenes (ganoderic acids, ganoderic alcohols, and their derivatives)Cytokine expression inhibited during early inflammation in colorectal carcinomaInduced autophagy through inhibition of p38 mitogen-activated kinase and activation of farnesyl protein transferase (FPT)[193]

Ginkgo bilobaFruit & leafIn vivo (murine)HT-2920–320 mg/LAqueousTerpene lactones and flavonoid glycosidesInhibited progression of human colon cancer cells induced HT-29 cell apoptosis(i) Activation in caspase 3, reduction in Bcl-2 expression, and elevation in p53 expression[112]

Rubus occidentalisFruitIn vivo (murine)JB6 Cl 4125 μg/mLMethanolicβ-Carotene, α-carotene, ellagic acid, ferulic acid, coumaric acidInhibited tumor development(i) Impaired signal transduction pathways leading to activation of AP-1 and NFB RU-ME fraction[194]

Oryza sativaSeedIn vivo (murine)HT-29, SW 480, HCEC100 μg/mLEthyl acetate extractPhenolic compound (tricin, ferulic acid, caffeic acid, and methoxycinnamic acid)Inhibited growth of human colon cancer cells(i) Induction of apoptosis by enhanced activation of caspases 8 and 3
(ii) Decreased the number of viable SW480 and HCEC cells
[113]

Cistanche deserticolaDried stemIn vivo (murine)SW480In vivo: 0.4 g/kg/day
In vitro: 100 mg/mL
AqueousPolysaccharides, phenylethanoid glycosidesDecreased mucosal hyperplasia and helicobacter infection(i) Increased number of splenic macrophages and NK cells
(ii) Decreased frequency of hyperplasia and H. hepaticus infection of the intestine
[133]

Rehmannia glutinosaNMIn vivo (male C57BL6 mice and Sprague-Dawley rats)CT2628 mg/kgNMCatalpol(i) Inhibited proliferation, growth, and expression of angiogenic markers(i) VEGF, VEGFR2, HIF-1α, bFGF inhibited the expressions of inflammatory factors such as IL-1β, IL-6, and IL-8[143]

Olea europaeaOlive mill wastewaterIn vivo (murine)NMNMMethanolicHydroxytyrosolInterferes with tumor cell growthNM[195]
LeafIn vivo (xenograft model) (murine)HCT116, HCT80, 5, 10, 20, 30, 50, and 70 μg/mLPhenolicOleuropein and hydroxytyrosolNM(i) Activation of caspases 3, 7, and 9
(ii) Decrease of mitochondrial membrane potential and cytochrome c release
(iii) Increase in intracellular Ca2+ concentration
[196]

Ginkgo biloba L.LeafIn vivo (rat)NM0.675 and 1.35 g/kgMethanolicFlavonoid glycosides, terpene lactones, and ginkgolic acids(i) Suppressed tumor cell proliferation, promoted apoptosis, and mitigated inflammationNM[197]

Rhus trilobata Nutt.NMIn vivo (hamster)NM400 mg/kg, 100 mg/kgAqueousTannic acid, gallic acidCytotoxic activityNM[54]

Annona diversifolia Saff.NMIn vivo (mice)SW-4801.5, 7.5 mg/kg/dayNMLaherradurinCytotoxic activityNM[54]

A. muricata L.NMIn vivo (rat)NM250/500 mg/kgEtOAcA, B, and C, and cis- and trans-annomuricin-D-onesCytotoxic activityNM[54]

Plumeria acutifolia Poir.NMIn vivo (hamster)NM400 mg/kg/dayAqueousNMCytotoxic activityNM[54]

Lasianthaea podocephala (A. Gray) K. M. BeckerNMIn vivo (hamster)NM200 mg/kg/dayAqueousNMCytotoxic activityNM[54]

Flourensia cernua DC.NMIn vivo (hamster)NM350 mg/kg/dayAqueousFlavonoids, sesquiterpenoids, monoterpenoids, acetylenes, p-acetophenones, benzopyrans, benzofuransCytotoxic activityNM[54]

Ambrosia ambrosioides (Cav.) W. W. PayneNMIn vivo (hamster)NM400 mg/kg/dayAqueousNMCytotoxic activityNM[54]

Alnus jorullensis KunthNMIn vivo (hamster)NM175 mg/kg/dayAqueousNMCytotoxic activityNM[54]

Dimorphocarpa wislizeni (Engelm.) RollinsNMIn vivo (hamster)NM100 mg/kg/dayAqueousNMCytotoxic activityNM[54]

Euphorbia pulcherrima Willd. ex KlotzschNMIn vivo (hamster)NM200 mg/kg/dayAqueousNMCytotoxic activityNM[54]

Acalypha monostachya Cav.NMIn vivo (hamster)NM400 mg/kg/dayAqueousNMCytotoxic activityNM[54]

Crotalaria longirostrata Hook. & Arn.NMIn vivo (hamster)NM400 mg/kg/day, 350 mg/kg/dayEtOH-CHCl3NMCytotoxic activityNM[54]

Asterohyptis stellulata (Benth.) EplingNMIn vivo (hamster)NM50 mg/kg/dayAqueousNMCytotoxic activityNM[54]

Acacia constricta A. GrayNMIn vivo (hamster)NM400 mg/kg/dayAqueousNMCytotoxic activityNM[54]

Holodiscus dumosus A. HellerNMIn vivo (hamster)NM350 mg/kg/dayAqueousNMCytotoxic activityNM[54]

Butea monospermaFlowerIn vivo (rat)HT-29150 mg/kgn-Butanol extractIsocoreopsin, butrin, and isobutrinFree radical scavenging and anticancer activitiesNM[198]

Taraxacum spp.RootIn vivo (xenograft murine model)HT-29, HCT11640 mg/kg/dayAqueousα-Amyrin, β-amyrin, lupeol, and taraxasterolInduced programmed cell deathNM[199]

NM: not mentioned.
(b) Other effects of medicinal plants in in vivo models

Scientific nameParts usedModelDoseType of extractImportant compoundsCellular effectMechanismsReferences

Allium sativumRootIn vivo (murine)NM2.4 mL of dailyEthanolicAllicin, S-allylmercaptocysteineSignificantly suppressed both the size and number of colon adenomasEnhancement of detoxifying enzymes: SAC and GST activity[200]

Olea europaeaFruitIn vivoCaco-250 μMAqueousPhenolic compounds, authentic hydroxyl tyrosol (HT)(i) Effect of OPE and HT on CB1 associated with reduced proliferation of Caco-2 cells
(ii) Increase in CB1 expression in the colon of rats receiving dietary EVOO
Increase in Cnr1 gene expression, CB1 protein levels[201]
In vivo (murine)HT11525 μg/mLHydroethanolicPhenolic compounds (p-hydroxyphenyl ethanol, pinoresinol & dihydroxyphenyl ethanol)NMInhibition via reduced expression of a range of α5 & β1[184]

Origanum vulgare L.LeafIn vivo (murine)NM20, 40, 60 mg·kg−1AqueousRosmarinic acid, caffeic acid, flavonoidsAntioxidant status(i) Increased LPO products and activity of SOD and CAT enzymes and GST and GPx activity
(ii) Antioxidant and anticarcinogenic effect
[202]

HazelnutSkinIn vivoNMThe flow rate 0.21 mL/min and injection volume 9.4 μLAqueousFlavan-3-ols, in monomeric and polymeric forms, and phenolic acids(i) Decreased circulating levels of free fatty acids and triglycerides
(ii) Higher excretion of bile acid
Increase of the total antioxidant capacity of plasma[203]

Apples and apple juiceFruitIn vivoNM90 mg/LAqueousPhenolic acids, flavonoids, tannins, stilbenes, curcuminoidsNMNM[204]

Grifola frondosaFruitIn vivo (murine)HT-2910 ng/mLAqueousPhenolic compounds (pyrogallol, caffeic acid, myricetin, protocatechuic acid, etc.)Inhibition of TNBS-induced rat colitis(i) Induced cell cycle progression in G0/G1 phase and apoptotic death[104]

Ruta chalepensisLeafIn vivo (human)NM250 μg/mLEthanolicRutin, gallic acid, catechin hydrate, naringinOxidative profile in patients with colon cancerNM[205]

Cannabis sativaDry flower & leafIn vivo (murine)DLD-1 and HCT1160.3–5 μMMethanolicCannabidiol, phytocannabinoidsNM(i) Reduced cell proliferation in a CB1-sensitive and AOM-induced preneoplastic lesions and polyps
(ii) Inhibition of colorectal cancer cell proliferation via CB1and CB2 receptor activation
[121]

Melia toosendanFruitIn vivo (murine)SW480, CT260, 10, 20, 30, 40, 50 μg/mLEthanolicTriterpenoids, flavonoids, polysaccharide, limonoidsNM(i) Inhibited cell proliferation of SW480 and CT26 by promoting apoptosis as indicated by nuclear chromatin condensation and DNA fragmentation
(ii) Induced caspase 9 activity which further activated caspase 3 and poly(ADP-ribose) polymerase cleavage, leading the tumor cells to apoptosis
[123]

Smallanthus sonchifoliusRootIn vivo (murine)NM73.90, 150.74, 147.65, and 123.26 mg/kgAqueousFructansNMReduction incidence of colon tumors expressing altered β-catenin[206]

Punica granatumPeelIn vivo (adult male Wistar rats)NM4.5 g/kgMethanolicGallic acid, protocatechuic acid, cateachin, rutin, ellagic acid, punicalaginNM(i) Reduction in TGF-β, Bcl-2, EGF, CEA, CCSA-4, MMP-7 and in COX-2, cyclin D1, survivin content
(ii) Downregulated expression of β-catenin, K-ras, c-Myc genes
[207]

Linum usitatissimumSeedIn vivo (male Sprague-Dawley rats)NM500 mg/kgAlkalineSecoisolariciresinol diglucoside, carbohydrates, proteins, and tanninsReduced the serum fasting glucose levelsSignificantly reduced the HbA1c, insulin levels, and proinflammatory cytokines[208]

Diospyros kakiFruitIn vivo (male CD-1 mice)NM15 mg/kgHydroacetonePolyphenol(i) Decreased attenuation of colon length in diarrhea severity
(ii) Reduced mortality rate
(iii) Reduction of the extent of visible injury (ulcer formation) and of mucosal hemorrhage
Decreased expression of COX-2 and iNOS in the colonic tissue[147]

Muntingia calaburaLeafIn vivo (rat)NM50, 250, 500 mg/kgMethanolicRutin, gallic acid, ferulic acid, and pinocembrinReduction of the colonic oxidative stress, increasing the antioxidants levels possibly via the synergistic action of several flavonoidsNM[209]

Portulaca oleraceaNMIn vivo (murine)HT-29 CSCs2.25 μg/mLAlcoholicNMRegulatory and target genes that mediate the Notch signal transduction pathwayInhibition of expression of the Notch1 and β-catenin genes[161]

Aloe veraGelIn vivo (murine)NM400 mg/kg/dayGelPolysaccharidesNM(i) Via inhibition of the cell cycle progression
(ii) Induction of cellular factors, such as extracellular signal-regulated kinases 1/2, cyclin-dependent kinase 4, and cyclin D1; on the other hand, PAG increased the expression of caudal-related homeobox transcription factor 2
[210]

Artemisia annua LinnéPowderIn vivo (xenograft murine model)HCT11620, 40 mg/kg/dayEthanolicPhenolic compoundsNM(i) Induced apoptosis via PTEN/p53/PDK1/Akt signal pathways through PTEN/p53
(ii) Inhibited cell viability and increased LDH release and apoptotic bodies, caspase 3 and 7 activation, and reduced mitochondria membrane potential
(iii) Regulated cytochrome c translocation to the cytoplasm and Bax translocation to the mitochondrial membrane
(iv) Regulation of proteins
[169]

Hordeum vulgarePowderIn vivo (xenograft murine model)HT-292 g/kg and 1 g/kgAqueous (fermented)β-Glucan, protein, amino acids, phenolic compoundsNM(i) Promoted tumor apoptosis by upregulating the mRNA expression of Bax and caspase 3 and downregulating the mRNA expression of Bcl-2 and cyclin D1
(ii) Decreased mRNA expression of Bcl-2 and cyclin D1
(iii) Upregulated expressions levels of Bax and caspase 3
[211]

Dendrophthoe pentandraLeafIn vivo (murine)NM125, 250, 500 mg/kgEthanolicQuercetin-3-rhamnoseNM(i) Decreased the levels of IL-22, MPO levels, proliferation of epithelial cells
(ii) Inhibited S phase of the cell cycle
(iii) Upregulated p53 wild-type gene expression
[212]

Aquilaria crassnaStem, barkIn vivo (murine)HCT1162,000 mg/kg/day
100, 200 mg/kg
NMResin and essential oilsNMNM[213]

Berberis integerrimaNMIn vivo (murine)NM50 and 100 mg/kgHydroalcoholicNMNMNM[214]

Salix aegyptiacaBarkIn vivo (murine)NM100 and 400 mg/kgEthanolicCatechin, catechol, and salicinNMDecreased level of EGFR, nuclear β-catenin, and COX-2[215]