Review Article

Bioactive Substances in Safflower Flowers and Their Applicability in Medicine and Health-Promoting Foods

Table 5

Action mechanisms by safflower substances.

ActivityResult of mechanismMechanismAuthors

Prevention of anaphylaxis(i) Inhibition of mast cell degranulation
(ii) Reduction the activation of the PLCγ-PKC-IP3 signaling pathway
(i) Inhibition of Ca2+ flow
(ii) Inhibition of MCP-1, IL-8, β-hexosaminidase, HA, and TNF-α release
(iii) Inhibition of phosphorylation of PLCγ1, IP3R, PKC, Akt, P38, and Erk1/2
[57]

Alleviation of polycystic ovary syndrome(i) Reduction of cysts
(ii) Regulation of the hormonal balance
(iii) Restoration of the ovulation cycle
(i) Reversion of the expression of genes Star, Hsd3b1, Cyp11a1 (increase), and Cyp19a1 (reduction)
(ii) Increase in antioxidant enzyme activities (SOD, GSH-Px, and CAT)
(iii) Regulation of the level of T, E2, FSH, P4, and AMH and the ratio of LH/FSH in serum
(iv) Reduction of MDA level and enhanced GSH content and GSH/GSSG ratio
[46]

Antitumor effects(i) Induction of cisplatin sensitivity by JNK and P38 MAPK signaling pathway(i) Increase in P-JNK and P-38 levels[45]
(i) Inhibition of cancer cell proliferation(i) Inhibition of Skov3 cell proliferation
(ii) Reduction of WSB1 expression
(iii) Inhibition of Erk1/2 expression and Erk phosphorylation
[90]
(i) Inhibition of cancer cell proliferation
(ii) Induction of cancer cell apoptosis
(i) Inhibition of the MCF-7 cell cycle at the S phase
(ii) Reduction of CDK2, cyclin D1, and cyclin E levels
(iii) Reduction of p-PI3K, PI3K, AKT, and p-AKT levels
[51]
(i) Inhibition of tumor angiogenesis(i) Inhibition of p38 MAPK phosphorylation
(ii) Reduction of MMP-2 and MMP-9 levels
(iii) Reduction of COX-2 expression by p38MAPK/ATF-2 signaling pathway (by inhibition of p38MAPK phosphorylation)
(iv) Increase of the caspase-3 cleavage in tumor cells
[91]
(i) Induction of autophagy in cancer cells by regulating Beclin 1 and ERK expression(i) Increase in Beclin 1 and LC3-II expression in tumor cells
(ii) Reduction of phosphorylated ERK1/2 expression and p62 level in tumor cells
[94]
(i) Induction of apoptosis of tumor cells by regulating the NF-κB signaling pathway (inhibition of the tumor growth)(i) Inhibition of the expression of ICAM1, MMP9, TNF-α, and VCAM1
(ii) Increase in the expression of p-IκBα and pP65
[92]

Alleviation of damage and brain injuries(i) Inhibition of the activation of the pyroptotic pathway and apoptosis of injured nerves
(ii) Activation of damage mitigating factor
(i) Reduction of cytokine expression (NLRP3, ASC, caspase-1, GSDMD, IL-1β, IL-18, LDH, NF-κB, and p-p56)
(ii) Changes in activation of the NF-κB signaling pathway
[63]
(i) Reduction of the apoptosis and autophagy of neural stem cells by modulation of the p38/MAPK/MK2/Hsp27-78 signaling pathway
(ii) Stimulation of the cell proliferation
(i) Reduction of p38 and Hsp27-78 phosphorylation and MK-2, Bax, cleaved caspase-3, LC3-II, and mTOR phosphorylation expression
(ii) Increase in Bcl-2 and p62 expression
[65]
(i) Inhibition of dopamine synthesis
(ii) Promotion α-syn clearance by regulating autophagy
(i) Increase in the formation of autophagosomes
(ii) Increase of TH, p-JNK1/JNK1, Beclin 1, Atg7, Atg12-5, and p-Bcl-2/Bcl-2 expression and the LC3-II/LC3-I ratio
(iii) Reduction of α-syn expression
[66]

Alleviation of diabetes complications(i) Inhibition of JNK/c-Jun signaling pathway
(ii) Alleviation of oxidative damage
(i) Inhibition of p-JNK and p-c-Jun activation
(ii) Reduction of phosphorylation of JNK and c-Jun
(iii) Reduction of cleaved parp and cleaved caspase-3 levels
[44]
(i) Promotion of PI3K and Akt activation
(ii) Inhibition of the apoptosis of pancreatic β-cells
(i) Increase of PI3K, AKT, and p-AKT expressions
(ii) Increase in contents of hepatic glycogen and glycogen synthase in the liver
[59]
(i) Reduction of renal fibrosis
(ii) Regulation of the TLR4/NF-κB(p65) pathway and miRNA-140-5p level
(i) Increase of miRNA-140-5p mRNA, BG, 24 h UP, TC, TG, T-AOC, MDA, IL-6, TNF-α, TLR4, NF-κB(p65), NLRP3, Notch2, and Col-IV[60]

Protection of the digestive system(i) Protection of the liver and other organs against aging(i) Increase of CAT, GSH-Px, MDA, and SOD activities
(ii) Reduction of the mRNA, protein level of cyclin-dependent kinase inhibitor p16 and phosphorylation of pRb
(iii) Increase in CDK4/6 protein expression
[86]
(i) Protection of the liver against damage(i) Reduction of ALT, ALP, AST, and total bilirubin levels[87]

Protection and treatment of cardiovascular diseases(i) Change in platelet activation pathway(i) Regulation of core genes: PRKACA, PIK3R1, MAPK1, PPP1CC, PIK3CA, and SYK[76]
(i) Inhibition of activation of the JAK2/STAT1 pathway(i) Inhibition of caspase-3 activity (reduction of H/R-induced apoptosis)
(ii) Reduction of Janus kinase 2 (JAK2)/signal transducer and activator of transcription 1 (STAT1) activity
(iii) Reduction of releases of cTnI, IL-6, and LdH
(iv) Change of expression levels of Bcl-2-associated X protein, Bcl-2, cleaved caspase-3, Fas ligand, and tumor necrosis factor receptor superfamily member 6 (Fas)
[47]
(i) Effect on vasodilation(i) Inhibition of the PKA and NO production
(ii) Activation of p-eNOS expression
(iii) Change of the influx of Ca2+ (TRPV4-dependent)
[81]

Protection of skeletal system(i) Regulation of pVHL/HIF-1α/VEGF pathway
(ii) Increase in angiogenesis and bone cell differentiation
(iii) Inhibition of HIF-1α expression
(i) Increase of ALP, Ang-2 (Angiopoietin-2), HIF-1α (hypoxia inducible factor-1α), OPN-1 (osteopontin-1), Runx2 (runt-related transcription factor 2), and VEGF (vascular endothelial growth factor) levels
(ii) Inhibition of SY-induced proliferation, migration, and angiogenesis
[69]
(i) Increase in osteoblast differentiation
(ii) Inhibition of osteoblast apoptosis
(i) Inhibition of caspase-3 activity (change in caspase-3-dependent signaling pathway)[70]

Protection of the respiratory system(i) Inhibition of the platelet activating factor in the airway epithelium
(ii) Reduction of inflammation
(i) Changes in the expression of interleukin- (IL-) 1β and IL-6, inflammatory signaling pathways, monolayer permeability of HSAECs, and tumor necrosis factor alpha
(ii) Reduction of inflammatory factor expression and nuclear factor-κB activation
(iii) Inhibition of activator protein-1, protein kinase C, and mitogen-activated protein kinase expression
[74]

Reduction of overweight and obesity(i) Change in the composition of intestinal microflora
(ii) Restoration of glucose homeostasis
(iii) Alleviate insulin resistance
(i) Changes in pathways of sphingolipid and glycerophospholipid metabolisms
(ii) Increase of L-carnitine, lysophosphatidylcholine, and sphingomyelin levels
(iii) Reduction of phosphatidylcholines
[67]
(i) Increase in the synthesis of antioxidant enzymes in adipose tissue and in the liver(i) Increase of expression of antioxidant enzymes and Nrf2 in adipocytes, liver tissue, and HepG2 cells
(ii) Regulation of glucose metabolism and liver function
[50]