Kumar Ganesan

A Critical Review on Polyphenols and Health Benefits of Black Soybeans

Polyphenols are plant secondary metabolites containing antioxidant properties, which help to protect chronic diseases from free radical damage. Dietary polyphenols are the subject of enhancing scientific interest due to their possible beneficial effects on human health. In the last two decades, there has been more interest in the potential health benefits of dietary polyphenols as antioxidant. Black soybeans (Glycine max L. Merr) are merely a black variety of soybean containing a variety of phytochemicals. These phytochemicals in black soybean (BSB) are potentially effective in human health, including cancer, diabetes, cardiovascular diseases, cerebrovascular diseases, and neurodegenerative diseases. Taking into account exploratory study, the present review aims to provide up-to-date data on health benefit of BSB, which helps to explore their therapeutic values for future clinical settings. All data of in vitro and in vivo studies of BSB and its impact on human health were collected from a library database and electronic search (Science Direct, PubMed, and Google Scholar). The different pharmacological information was gathered and orchestrated in a suitable spot on the paper.

Polyphenol-Rich Dry Common Beans (Phaseolus vulgaris L.) and Their Health Benefits

Polyphenols are plant metabolites with potent anti-oxidant properties, which help to reduce the effects of oxidative stress-induced dreaded diseases. The evidence demonstrated that dietary polyphenols are of emerging increasing scientific interest due to their role in the prevention of degenerative diseases in humans. Possible health beneficial effects of polyphenols are based on the human consumption and their bioavailability. Common beans (Phaseolus vulgaris L.) are a greater source of polyphenolic compounds with numerous health promoting properties. Polyphenol-rich dry common beans have potential effects on human health, and possess anti-oxidant, anti-diabetic, anti-obesity, anti-inflammatory and anti-mutagenic and anti-carcinogenic properties. Based on the studies, the current comprehensive review aims to provide up-to-date information on the nutritional compositions and health-promoting effect of polyphenol-rich common beans, which help to explore their therapeutic values for future clinical studies. Investigation of common beans and their impacts on human health were obtained from various library databases and electronic searches (Science Direct PubMed, and Google Scholar).

Polyphenol-Rich Lentils and Their Health Promoting Effects

Lentil (Lens culinaris; Family: Fabaceae) is a potential functional dietary ingredient which has polyphenol-rich content. Several studies have demonstrated that the consumption of lentil is immensely connected to the reduction in the incidence of diseases such as diabetes, obesity, cancers and cardiovascular diseases due to its bioactive compounds. There has been increasing scientific interest in the study area of lentils as the functional food due to its high nutritive value, polyphenols, and other bioactive compounds. These polyphenols and the bioactive compounds found in lentil play an important role in the prevention of those degenerative diseases in humans. Besides that, it has health-promoting effects. Based on the in vitro, in-vivo and clinical studies, the present review focuses to provide more information on the nutritional compositions, bioactive compounds including polyphenols and health-promoting effects of lentils. Health-promoting information was gathered and orchestrated at a suitable place in the review.

Solanum trilobatum L. Ameliorate Thioacetamide-Induced Oxidative Stress and Hepatic Damage in Albino Rats

Solanum trilobatum L. (Solanaceae) has been well known as nightshade, commonly used by diverse populations to heal several disorders. Earlier studies in Solanum trilobatum were focused on different pharmacological activities and a few were concerned with antioxidant and hepatoprotective effects. Thus, the current study was focused to evaluate the antioxidant potential and hepatoprotective effects of S. trilobatum L. on thioacetamide (TAA) intoxication in Wistar albino rats. The rats were kept into four groups and six animals each. Group A was normal control. Group B was the TAA treated control. Groups C and D were pretreated with the aqueous extract from the leaves of S. trilobatum (100 mg, 200 mg/kg bw p.o.) once daily for 10 consecutive days administration followed by a single dose infusion of TAA (100 mg/kg s.c.). After 10 days, blood and livers were collected. The biochemical assay was carried out in the GSH (reduced glutathione), TBARS(thiobarbituric acid reactive substances), Na+-K+-ATPase, and antioxidant enzymes viz., SOD (superoxide dismutase), CAT (catalase), GPx (glutathione peroxidase), GST (glutathione-S-transferase), and GR (glutathione reductase) were analyzed in samples of blood and liver. Treatment with S. trilobatum reduced blood and liver TBARS, and Na+ K+ ATPase activity in TAA (thioacetamide)-induced hepatotoxicity rats. Furthermore, the above antioxidant enzymes were increased in the pretreatment of S. trilobatum in TAA intoxicated rats. Finally, we concluded that S. Trilobatum displayed potent antioxidant properties and alleviate oxidative stress induced hepatotoxic effects and possible engross mechanisms related to free radical scavenging properties.

Molecular targets of vitexin and isovitexin in cancer therapy: a critical review

Cancer is a primary public health problem and the second leading cause of death worldwide. It causes life‐threatening malignancies and results in high financial costs for both patients and the healthcare system. Hence, it is important to develop effective long‐term strategies pertaining to prevention and control of cancers. Plant‐derived secondary metabolites have been shown to have positive roles against various cancers. A number of plant extracts have been evaluated for possible use in the treatment of cancer; some have provided direction for new strategies for the research and development of antitumor agents. Here, we provide comprehensive data on various cancers, potential molecular mechanisms, and therapeutic implications of just two plant‐derived compounds, vitexin and isovitexin. Information on the chemotherapeutic potential of vitexin and isovitexin was collected from a library database and through electronic searches (ScienceDirect, Pubmed, and Google Scholar). Both in vitro and in vivo studies suggest that vitexin and isovitexin are chemopreventive compounds with activity against various cancers through proapoptotic processes and/or autophagy.

Isoquercetin ameliorates hyperglycemia and regulates key enzymes of glucose metabolism via insulin signaling pathway in streptozotocin-induced diabetic rats

&NA; Among the foremost common flavonoids within the human diet, quercetin glycosides possess neuroprotective, cardioprotective, anti‐oxidative, chemopreventive, and anti‐allergic properties. Isoquercetin is one such promising candidate with anti‐diabetic potential. However, complete studies of its molecular action on insulin signaling pathway and carbohydrate metabolizing enzymes remain unclear. Hence, we have designed this study to accumulate the experimental evidence in support of anti‐diabetic effects of isoquercetin. Male albino Wistar rats were divided into seven groups. Rats (Groups 3–7) were administered a single intraperitoneal injection of streptozotocin (STZ; 40 mg/kg b.w) to induce diabetes mellitus. As an extension, STZ rats received isoquercetin at three different doses (20, 40 and 80 mg/kg b.w), and Group 7 rats received glibenclamide (standard drug) (600 &mgr;g/kg b.w). The results showed that STZ exaggerated blood sugar, decreased insulin, altered metabolizing enzymes, and impaired the mRNA expression of insulin signaling genes and carbohydrate metabolizing enzyme genes. Supplementation with isoquercetin significantly normalized blood sugar levels, insulin and regulated the mRNA expression of insulin signaling genes and carbohydrate metabolizing enzyme genes. The results achieved with isoquercetin are similar to that of standard drug glibenclamide. The findings suggest isoquercetin could be a possible therapeutic agent for treating diabetes mellitus in the near future.

Telomerase Inhibitors from Natural Products and Their Anticancer Potential

Telomeres and telomerase are nowadays exploring traits on targets for anticancer therapy. Telomerase is a unique reverse transcriptase enzyme, considered as a primary factor in almost all cancer cells, which is mainly responsible to regulate the telomere length. Hence, telomerase ensures the indefinite cell proliferation during malignancy—a hallmark of cancer—and this distinctive feature has provided telomerase as the preferred target for drug development in cancer therapy. Deactivation of telomerase and telomere destabilization by natural products provides an opening to succeed new targets for cancer therapy. This review aims to provide a fundamental knowledge for research on telomere, working regulation of telomerase and its various binding proteins to inhibit the telomere/telomerase complex. In addition, the review summarizes the inhibitors of the enzyme catalytic subunit and RNA component, natural products that target telomeres, and suppression of transcriptional and post-transcriptional levels. This extensive understanding of telomerase biology will provide indispensable information for enhancing the efficiency of rational anti-cancer drug design.

A critical review on hepatoprotective effects of bioactive food components

ABSTRACT Background: Bioactive food components are nonessential biomolecules, which help to give beneficial effects to human being against several diseases. Natural bioactive food components derived from plants and animals, such as phytosterols, carotenoids, polyphenols and fatty acids, have been proposed as valuable substitutions for anticipation and management of hepatotoxic effects and its chronic complications based on in vitro and in vivo studies. Objectives of the study: To summarize drugs and chemical-induced hepatotoxicity and review how various bioactive food components attenuate the hepatotoxicity via cellular mechanisms. Results: Remarkable studies demonstrated that the health promoting effects of bioactive components originated from plants have been frequently attributed to their antioxidant properties and facilitate to increase cellular antioxidant defense system and thereby scavenge free radicals, inhibit lipid peroxidation, augment anti-inflammatory potential, and further protect the liver from damage. Conclusion: In this critical review, we summarize current progress in clarifying the molecular mechanism in hepatotoxicity and curative potential of the bioactive food components and its successive clinical outcomes in the field of drug discovery and overcome the problems of medication and chemical-induced hepatotoxic effects.

Protective Effect of Aqueous Extract from the Leaves of Justicia tranquebariesis against Thioacetamide-Induced Oxidative Stress and Hepatic Fibrosis in Rats

The present study aims to examine the protective effect of Justicia tranquebariesis on thioacetamide (TAA)-induced oxidative stress and hepatic fibrosis. Male Wister albino rats (150–200 g) were divided into five groups. Group 1 was normal control. Group 2 was J. tranquebariensis (400 mg/kg bw/p.o.)-treated control. Group 3 was TAA (100 mg/kg bw/s.c.)-treated control. Groups 4 and 5 were orally administered with the leaf extract of J. tranquebariensis (400 mg/kg bw) and silymarin (50 mg/kg bw) daily for 10 days with a subsequent administration of a single dose of TAA (100 mg/kg/s.c.). Blood and livers were collected and assayed for various antioxidant enzymes (SOD, CAT, GPx, GST, GSH, and GR). Treatment with J. tranquebariensis significantly reduced liver TBARS and enhanced the activities of antioxidant enzymes in TAA-induced fibrosis rats. Concurrently, pretreatment with J. tranquebariensis significantly reduced the elevated liver markers (AST, ALT, ALP, GGT, and TB) in the blood. In addition, J. tranquebariensis- and silymarin- administered rats demonstrated the restoration of normal liver histology and reduction in fibronectin and collagen deposition. Based on these findings, J. tranquebariensis has potent liver protective functions and can alleviate thioacetamide-induced oxidative stress, hepatic fibrosis and possible engross mechanisms connected to antioxidant potential.

Trianthema portulacastrum L. (giant pigweed): phytochemistry and pharmacological properties

Trianthema portulacastrum L. (Aizoaceae) commonly called as black pigweed or giant pigweed, which is a yearly herb, utilized as purgative, pain relieving, stomachic and provide as alternative heal for lung disease, cardiovascular disease, anemia and edema. In the Ayurvedic system of medicine, the plant is used in the treatment of inflammation in the peripheral organs, uteralgia and cough. Taking into account exploratory study, the present review aims to provide up-to date data about the routine uses, phytochemistry, and pharmacological actions of T. portulacastrum to explore their therapeutic value for future clinical settings. All data of T. portulacastrum were collected from library database and electronic search (ScienceDirect, Pubmed, and GoogleScholar). The different pharmacological information was gathered and orchestrated in a suitable spot on the paper. The genus Trianthema comprises of 64 species. Among them, the species of T. portulacastrum has been easily known for their customary uses. Phytochemical studies showed that T. portulacastrum included trianthamine, ecdysterone, flavonoid (5,2 dihydroxy-7methoxy-6,8 dimethyl flavone), leptorumol (5,7 dihydroxy-6,8 dimethyl chromone), and other intermediary bioactive compounds such as β-sitosterol, stigmasterol, and their β-glucopyranosides, β-cyanin, 3,4-dimethoxy cinnamic acid, 5-hydroxy-2-methoxy benzaldehyde, 3-acetyl aleuritolic acid, pmethoxy benzoic acid, and p-propoxy benzoic acid. The plant extracts showed significant antioxidant, anti-inflammatory, hepatoprotective, antihyperglycemic, antimicrobial, and anticancer activities. The toxicity study conducted in animals and no noteworthy mortality found till 4xa0g/kg b.w. Taking into account on animal studies, T. portulacastrum have different bioactivities including antihyperglycemic, hepatoprotective, anticancer, antimicrobial and modulate different cellular signals related to control of oxidative stress and inflammation. The phytoconstituents of T. portulacastrum have a various potential to exact pharmacological benefits and possible chemotherapeutic mediator. Nevertheless, more support for such properties/dynamic constituents have been obtained from cellular and molecular studies, while clinical studies are as yet deficient. Since animal research do not constantly interpret to human conditions, additional clinical studies are also warranted to infer the full interpretation impact of T. portulacastrum for prevention of human diseases. Hence, future comprehensive clinical studies are required to warrant the therapeutic usefulness of the T. portulacastrum.Graphical Abstract