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Background: Liver injury induced by drugs has become a primary reason for acute liver disease and therefore posed a potential regulatory and clinical challenge over the past few decades and has gained much attention. It also remains the most common cause of failure of drugs during clinical trials. In 50% of all acute liver failure cases, drug-induced hepatoxicity is the primary factor and 5% of all hospital admissions. Methods: The various hepatotoxins used to induce hepatotoxicity in experimental animals include paracetamol, CCl4, isoniazid, thioacetamide, erythromycin, diclofenac, alcohol, etc. Among the various models used to induce hepatotoxicity in rats, every hepatotoxin causes toxicity by different mechanisms. Results: The drug-induced hepatotoxicity caused by paracetamol accounts for 39% of the cases and 13% hepatotoxicity is triggered by other hepatotoxic inducing agents. Conclusion: Research carried out and the published papers revealed that hepatotoxins such as paracetamol and carbon- tetrachloride are widely used for experimental induction of hepatotoxicity in rats.

: Alzheimer's disease (AD) is a chronic neurodegenerative brain disorder characterized by memory impairment, dementia, oxidative stress in elderly people. Currently, only a few drugs are available in the market with various adverse effects. So to develop new drugs with protective action against the disease, research is turning to the identification of plant products as a remedy. Natural compounds with anti-inflammatory activity could be good candidates for developing effective therapeutic strategies. Phytochemicals including Curcumin, Resveratrol, Quercetin, Huperzine-A, Rosmarinic acid, genistein, obovatol, and Oxyresvertarol were reported molecules for the treatment of AD. Several alkaloids such as galantamine, oridonin, glaucocalyxin B, tetrandrine, berberine, anatabine have been shown anti-inflammatory effects in AD models in vitro as well as in-vivo. In conclusion, natural products from plants represent interesting candidates for the treatment of AD. This review highlights the potential of specific compounds from natural products along with their synthetic derivatives to counteract AD in the CNS.

Around 3000 species of Saussurea are known, however Saussurea lappa Clarke which is perennial herb and has been traditionally used as anticancer, anti-inflammatory, antiviral, medicine without many adverse effects. Phytochemistry of Saussurea lappa after thorough literature survey revealed various varied and copious metabolites such as sesquiterpenes, flavonoids, phytosterols, lignans, terpenes. Many of these compounds have been found to possess a wide range of biological activity such as anticancer, anti-inflammatory, anti-hepatotoxic, anti-viral, etc. Among sesquiterpenes particularly Dehydrocostuslactone, dihydrocostunolide, costunolide Lappadilactone, have been isolated as the main chemical constituents. This review aims to cover published work from public databases (e.g. PubMed, Google Scholar, ResearchGate) and Non-English, Ph.D./MS thesis databases (e.g. CKNIChina, Jairo-Japan, Myto-Malaysia, Shodhganga-India) with a particular focus on phytochemistry and therapeutic uses of different fractions as well as isolated compounds from Saussurea lappa.

Background: Polyphenolics, a group of natural substances with a wide distribution in plant kingdom present a great diversity of biological activities such as anti-oxidative, anti-inflammatory, anti-mutagenic, anti-carcinogenic, modulation of enzyme activity, prevention of CHD, etc. The objective of this review was to describe the relevant aspects of polyphenolics, reporting the different known groups, the probable mechanisms by which they act as anti-inflammatory agents. The attempt was also being made to enumerate the possible leads e.g. curcumin, resveratrol, baicalein for further development. Methods: For peer-reviewed research literature we undertook a structured search of bibliographic databases using a focused review question. The quality of retrieved papers was appraised using standard tools. The systemic review consists of research using scientific databases such as PubMed, Scopus, Science Direct, Google Scholar. Research: Compounds like Quercetin, luteolin, apigenin, fisetin, wogonin, and baicalein showed anti-inflammatory activity in-vitro through different cellular mechanisms and these were also reported to possess significant anti-inflammatory activity in animal models of inflammation. Conclusion: It is evident that polyphenolics compounds such as flavonoids, lignans, phloroglucinols, stilbenes, diarylheptanoids, quinones, and phenylpropanoids exhibited significant anti-inflammatory activity in-vivo as well as in-vitro. Although, these active compounds are not drugs per se, however, they deserve further investigation as potential candidates for anti-inflammatory drug development through preclinical and clinical studies.