AN IN-DEPTH ASSESSMENT OF THE TUMOR'S IMPACT ON SARCOPENIA

Loss of muscle mass is a typical symptom of cancer and it is strongly correlated with poor prognosis. Cancer-related Sarcopenia is unresponsive to conventional dietary changes and exercise, in contrast to age-associated muscle atrophy. This particular type of weakness differs from different kinds of muscle loss in that it is triggered by a number of interrelated mechanisms, notably inflammatory processes, abnormal metabolic processes, proteolysis, and autophagy. This research is to examine evidence supporting the theory that tumors have a causal role in causing muscular atrophy. It seeks to investigate the precise regulators that the tumour generates and how they affect the processes that result in muscle waste. The evaluation looks for new directions for further studies and medical treatments. The analysis is based on a thorough examination of the scientific literature and research that shows how tumor and muscle atrophy are related. It concentrates on studies that clarify the numerous strategies by which malignancies cause the loss of muscle. This article highlights particular mechanisms by which these tumor-derived substances affect the development of muscle loss, including inflammatory processes, metabolic disturbance, proteolysis, and autophagy. The discovery of such targets offers hope for the creation of efficient treatment strategies that can enhance the long-term outlook and quality of life of cancer sufferers who are experiencing muscle loss.

Synthesis, In vivo Biological Evaluation and Molecular Docking Study of some newer Oxadiazole Derivatives as Anticonvulsant, Antibacterial and Analgesic agents

BACKGROUND

The compounds containing heterocyclic cores with O, N and/or S atoms are bioactive and valuable molecules in the field of drug discovery and development. There are several applications in different areas for the molecules having oxadiazole moiety in their structures viz. herbicides and corrosion inhibitors, electron-transport materials, polymers and luminescent materials. Hence, demand for new anticonvulsant, antibacterial and analgesic agents has turned into an imperative assignment in the area of medicinal chemistry to improve therapeutic efficacy as well as safety.

METHOD

In the journey of new anticonvulsive, antibacterial and analgesic molecules with better potency, some newer Oxadiazole analogues were attained by a sequence of synthetic steps with the substituted acrylic acids. IR and 1H-NMR spectral data were used for the structure elucidation of obtained chemical compounds. In this perspective, the anticonvulsant, antibacterial and analgesic activities were evaluated for synthetically obtained newer chemical moieties. Furthermore, a molecular docking study was performed to elucidate the binding modes of synthesized ligands in the active pockets of Cox-1/2 enzymes, DNA Gyrase and GABA inhibitors.

RESULT

It has been observed that all the synthetic molecules showed good analgesic activity while A1 molecule demonstrated better analgesic activity. In the case of anticonvulsant and antibacterial activity among other ligands, C1 molecule possessed profound anticonvulsant activity whereas B1 molecule showed maximum antibacterial activity and molecular docking study also endorsed the same consequences.

CONCLUSION

It might be recognized from the present study that prepared compounds are distinctive in lieu of their structure and noticeable biological activity. In the quest for a newer group of anticonvulsant, antibacterial and analgesic molecules, these compounds might be useful for the society.

Synthesis, Structure-Activity Relationship, and Biological Activity of Benzimidazole-Quinoline: A Review to Aid in the Design of a New Drug

Abstract:

Heterocyclic compounds are fundamental building blocks for developing novel bioactive compounds. Due to their extensive uses in both industrial and synthetic organic chemistry, quinoline and benzimidazole have recently become important heterocycles. Clinical trials have investigated quinoline and benzimidazole analogues to treat a variety of illnesses, including cancer, bacterial and fungal infection, DNA damage, etc. Medicinal chemists are paying attention to nitrogen-containing hybrid heterocyclic compounds that have a wide range of therapeutical potential with lesser adverse effects. Many efforts have been made to find new and more efficient ways to synthesize these molecules. However, microbial resistance is becoming a major threat to the scientific community; hence, the necessity for the discovery and development of novel antimicrobial drugs with novel modes of action is becoming highly significant. One strategy to overcome this problem is to produce hybrid molecules by combining two or more bioactive heterocyclic moieties in a single molecular platform. Based on established research data on quinoline-bearing benzimidazole derivatives, it can be concluded that both moieties are used for the synthesis of promising therapeutically active agents. This present review comprises the synthetic approaches of biologically active quinolines containing benzimidazole derivatives with their structure-activity relationship studies to provide an overview of the work done on quinoline derivatives to the medicinal chemist for future research.

Camphor and Menthol as Anticancer Agents: Synthesis, Structure-Activity Relationship and Interaction with Cancer Cell Lines

Cancer is a type of human cell degenerative disease that has afflicted a large number of people for years. Cancer is caused due to the abnormal proliferation of cells in any part of the body. Most of the prescribed anticancer drugs are synthetic in nature and have been reported with enormous adverse effects. The researchers are very much enthusiastic about the use of natural compounds and their derivatives, which have been reported with less toxicity. Natural compounds have emerged as promising synergistic compounds with potential anticancer effects. In vitro anticancer activity of natural compounds with special reference to camphor and menthol has been investigated against different cancer cell lines. It has been found that camphor and menthol derivatives have potential cytotoxic activity. The present literature review outlines the various methods for the synthesis of camphor and menthol derivatives, which have potential cytotoxic activity. It highlights various cancer cell lines, which are the target of these camphor and menthol derivatives as ligands, along with structure-activity studies.

An Insight into the Hepatoprotective Activity and Structure-activity Relationships of Flavonoids

BACKGROUND

Flavonoids are a class of polyphenolic bioactive compounds obtained from plants, which have a wide range of chemical structures and properties. More than 9000 distinct flavonoid molecules have been identified and have been found to regulate numerous developmental processes and play key biological roles in living organisms.

OBJECTIVE

This review aims to highlight the hepatoprotective potentiality of flavonoids and corelate their pharmacological activity with their chemical structure.

METHODS

With the advancement in the field of research related to phytochemicals, it is evident that flavonoids have versatile health benefits, viz., antioxidant property, free radical scavenging capacity, anticancer activity. The basic structures are C6-C3-C6 rings with various substitution patterns, resulting in a succession of subclass compounds, and the relationships between chemical structures and bioactivity have previously been investigated.

RESULTS

The hepatoprotective effects of bioactive flavonoids derived from plants have been widely linked to their antioxidant activity, antiinflammatory activity, effects on Sterol Regulatory Element- binding Proteins (SREBP), Peroxisome Proliferator-activated Receptor gamma (PPARγ) receptors, and inflammatory mediator cytokines according to numerous studies. The C2-C3 double bond at the A ring, as well as the hydroxyl groups of C3'or C4', and the carbonyl group at position C4, have been shown to augment their hepatoprotective activities; however, hydroxymethylation at C3' and C4' has been found to diminish the hepatoprotective activity.

CONCLUSION

The impact of flavonoid moieties and the structure-activity relationship of flavonoids related to combating various hepatic disorders have been vividly discussed in this review paper.

Insight into the Synthesis, Biological Activity, and Structure-activity Relationship of Benzothiazole and Benzothiazole-hydrazone Derivatives: A Comprehensive Review

Heterocyclic compounds constitute the most important part of medicinal as well as organic chemistry. Most of the marketed drugs possess therapeutic activity because of the presence of heterocyclic scaffolds as part of their structure. A slight change in the structure of the heterocyclic moieties may result in a major change in the therapeutic response of the drug candidate. Among all heterocycle compounds, the compounds containing nitrogen and sulfur atoms serve as a unique resource for drug development, such as benzothiazoles. Benzothiazole is a benzofused heterocyclic that is widely reported as a constituent of naturally occurring chemicals and chiefly responsible for their pharmacological potential. It was also reported that the pharmacological activity of BTA may also be influenced by its coupling with aldehydes, ketones, or hydrazines to form respected benzothiazole-hydrazone derivatives. The present comprehensive review consists of various synthesis methods, biological activities, and structure-activity relationships of and targets of benzothiazole and benzothiazole-hydrazone derivatives to provide a wide range of information to medicinal chemists for future research work.

Recent Insights on Synthetic Methods and Pharmacological Potential in Relation with Structure of Benzothiazoles

Benzothiazole is a bicyclic heterocyclic compound that contains benzene fused with 1, 3- thiazole ring. Several researches established the potential of benzothiazoles as important moiety in various adverse pharmacological conditions. Benzothiazole and its derivatives have been in use and marketed as anti-microbial, anti-inflammatory, anti-diabetic, anti-oxidant, anti-convulsant, antitumor, etc. The variations in pharmacological potentials of benzothiazole and its derivatives have been rational with their chemical structure. Nowadays, hybridization of two or more pharmacophores to synthesize a single molecule with potent pharmacological action is used. This helps to synergize pharmacological properties, make interaction possible with many targets, or minimize the adverse effects associated with them. Several synthetic approaches have been reported for benzothiazole and its derivatives. In this present review article, we focused on recently adopted synthetic approaches for the synthesis of the benzothiazole nucleus and its derivatives. The structure-activity relationship in relation to different pharmacological activities has also been highlighted to provide a good understanding to the researchers for future research on benzothiazoles.

Insight Into the various approaches for the enhancement of bioavailability and pharmacological potency of terpenoids: A Review

Abstract:

Terpenoids are naturally occurring secondary metabolites that consist of isoprene units (i.e., 2-methyl-1,3-butadiene). Terpenoids became recognized because of their diverse pharmacological benefits, such as anti-cancer, anti-inflammatory, antioxidant, analgesic, antibacterial, antifungal, hepatoprotective, antiviral, and antiparasitic activities. But most of these compounds have limited lipophilicity, dissolution rate, aqueous solubility, and drug permeability, so they are not used effectively. The low bioavailability significantly interferes with the performance of terpenoids to cure diseases, and the absorption process of terpenoids also becomes disrupted; therefore, their bioavailability in the blood becomes insufficient to achieve optimal treatment activity. Thus, to overcome this limitation, some strategies are used, such as nanotechnology (nanoparticles, carrier complexation), cocrystal, and glycosylation. Thus, this review summarizes the chemistry of terpenoids, factors that limit the bioavailability of terpenoids, and strategies employed to date with their design principles and outcomes possibly increasing their bioactivity.

Review on the discovery of new Benzimidazole derivatives as Anticancer Agents: Synthesis and Structure-Activity Relationship (2010-2022)

Background:

Benzimidazole (Benz-fused bicyclic ring system) is the most versatile class of heterocyclic compounds due to their numerous applications in industrial and synthetic organic chemistry because of its many biological actions. Benzimidazole analogs have been utilized to discover a variety of medical problems, such as cancer, bacterial infections, fungal infections, etc. Nitrogen-containing hybrid heterocyclic compounds are being studied by researchers because it provides a broad range of therapeutic potential and has minimal side effects.

Objective:

The current review of the literature emphasizes recent developments in the design of new benzimidazole derivatives as possible anticancer agents with their relationship between structure and activity, which will give insight into the future design of more active benzimidazole molecules.

Result and Conclusion:

The present review consists of synthetic protocols for the synthesis of benzimidazole derivatives along with their pharmacological potentials and structure-activity relationship in correlation with synthetic molecules to provide a depth view of the work done on benzimidazole. It would be significant for further research in the development of better drug molecules representing a potent derivative of medicinal agents.

Recent Updates on Synthesis, Biological Activity, and Structure-Activity Relationship of 1,3,4-oxadiazole-Quinoline Hybrids: A Review

Due to their diverse applications in industrial and synthetic organic chemistry, quinoline and 1,3,4-oxadiazole have become important heterocyclic compounds. Quinoline and 1,3,4-oxadiazole compounds have been developed for various medical conditions such as anti-cancer, anti-bacterial, anti-fungal, antimalarial, antioxidants, anti-HIV, anticonvulsant, antiviral, etc. The current review includes synthetic protocols for biologically active 1,3,4-oxadiazole incorporating quinoline hybrids with their structure-activity relationship to explore work (Mainly from 2010 to 2021) based on 1,3,4-oxadiazole-quinoline hybrids to the medicinal chemist for further research in the development of the molecule.

Updates on the Synthetic Strategies and Structure-Activity Relationship of Anticonvulsant Benzothiazole and Benzimidazole Derivatives

Abstract:

Epilepsy is a chronic neurological disorder, characterized by periodic and unpredictable seizures affecting the neurobiological, psychological, cognitive, economic, and social well-being of patients. It is one of the causes of concern in developed as well as in developing countries as currently marketed drugs are not capable to provide protection against it. Although several heterocyclic moieties have been frequently used as building blocks for the preparation of anticonvulsant drugs, more focused and consistent research on the synthesis of potential molecules with less adverse effects is needed of the hour. It can be concluded on the basis of available research reports that among several heterocyclic compounds, benzo-fused five-membered heterocyclic moieties (benzothiazole and benzimidazole) have been utilized far less than their great potential as building blocks for the synthesis of anticonvulsant drugs. Various reports clearly established that the required pharmacophore model could be easily achieved through benzothiazole and benzimidazole moieties as two hetero atoms and aryl rings are present in the structure. The present study highlights various synthetic approaches for anticonvulsant benzothiazole and benzimidazole derivatives with their structure-activity relationship studies, in order to provide a trove of knowledge to medicinal chemists for future research.

Insights into Interactions of Human Cytochrome P450 17A1: Review

Abstract:

Cytochrome P450s are a widespread and vast superfamily of hemeprotein monooxygenases that metabolize physiologically essential chemicals necessary for most species' survival, from protists to plants to humans. They catalyze the synthesis of steroid hormones, cholesterol, bile acids, and arachidonate metabolites and the degradation of endogenous compounds such as steroids, fatty acids, and other catabolizing compounds as an energy source and detoxifying xenobiotics such as drugs, procarcinogens, and carcinogens. The human CYP17A1 is one of the cytochrome P450 genes located at the 10q chromosome. The gene expression occurs in the adrenals and gonads, with minor amounts in the brain, placenta, and heart. This P450c17 cytochrome gene is a critical steroidogenesis regulator which performs two distinct activities: 17 alpha-hydroxylase activity (converting pregnenolone to 17-hydroxypregnenolone and progesterone to 17-hydroxyprogesterone, these precursors are further processed to provide glucocorticoids and sex hormones) and 17, 20-lyase activity (which converts 17-hydroxypregnenolone to DHEA). Dozens of mutations within CYP17A1 are found to cause 17-alpha-hydroxylase and 17, 20-lyase deficiency. This condition affects the function of certain hormone-producing glands, resulting in high blood pressure levels (hypertension), abnormal sexual development, and other deficiency diseases. This review highlights the changes in CYP17A1 associated with gene-gene interaction, drug-gene interaction, chemical-gene interaction, and its biochemical reactions; they have some insights to correlate with the fascinating functional characteristics of this human steroidogenic gene. The findings of our theoretical results will be helpful to further the design of specific inhibitors of CYP17A1.

Synthetic Strategies of Pyrazoline Derivatives for the Development of New Anticancer Agents: Recent Updates

Background:

Pyrazoline is a heterocyclic compound of five rings, three carbon atoms, and two nitrogen atoms in a circle with just one endocyclic bond. Pyrazoline is one form of electron-rich nitrogen carrier, gaining popularity because it combines exciting electronic properties with the potential for dynamic applications. Many methods have been used in this research to synthesize pyrazoline derivatives to show a highly biological effect.

Objective:

The research of pyrazoline derivatives' biological activity has been a fascinating area of pharmaceutical chemistry. Pyrazolines are used in multifunctional applications. The current review of pyrazoline derivatives patent literature (2000-2021) describing the introduction, general method, and synthetic scheme on Anticancer activity has been discussed.

Conclusion:

Pyrazolines is a known heterocyclic compound. Pyrazoline is a five-membered ring containing three carbon and two nitrogen atoms nearby. Many approaches can be used to figure out their Synthesis. Numerous pyrazoline derivatives have been discovered to have an essential biological effect on anticancer activity, which has encouraged research in this area. The use of pyrazoline against cancer is a brilliant moiety and has an enormous scope of interest for the researchers to search more about this moiety.

Benzothiazole: Synthetic Strategies, Biological Potential, and Interactions with Targets

:

Benzothiazole is a heterocyclic compound that contains a benzene ring fused with a five-member 1,3-thiazole ring. Several types of research have established its potential as an antimicrobial agent, anticancer agent, anti-epileptic agent, antiviral agent, etc. Nowadays, various effective drugs utilize the hybridization of two or more pharmacophores in a single-molecule for synergizing its pharmacological action or to interact with more than one target or to reduce the side effects associated with it. In this article, various strategies for the synthesis of different pharmacologically active hybrid compounds containing benzothiazole with different substituents are highlighted. Apart from presenting the synthesis strategies, the article also highlights various pharmacological actions and molecular interactions with different biological molecules of the potential drugs containing benzothiazole.

Comprehensive Review on Synthetic Approaches and Biological Activities of 1,3,4-Oxadiazole

Abstract:

Among the large variety of nitrogen and oxygen heterocycles, 1,3,4-oxadiazole, the scaffold, has attracted considerable attention owing to its ability to showing an extensive range of pharmacological actions. Therefore, significant efforts of organic chemists have been directed towards the construction of new drug candidates containing 1,3,4-oxadiazole subunits connected to a known pharmaceutical or a potential pharmacophore. This digest highlights recent publications on the various synthesis techniques of 1,3,4-oxadiazole and related compounds over the previous ten years (2011–2021). The purpose of this review is to learn about several ways for synthesizing oxadiazole. These heterocyclics are formed mainly by the cyclization reactions of various reactants under diverse circumstances. According to the literature investigations, they were given a high priority for their pharmacological significance, such as anticonvulsant, anticancer, antioxidant, anti-inflammatory, antibacterial, antidiabetic, etc.

Anti-Diabetic Potentials of Thiazolidinedione Analogues with Efficient Synthetic Procedures: A Review of Literature

Background::

Diabetes mellitus refers to one of the leading cause of diseases that affect large populations of human and is characterized by a high glucose level in the blood (also known as hyperglycemia). Thiazolidinedione (TZD) is a five-member heterocyclic compound consisting of three carbons, nitrogen and sulfur. It is also known as glitazones, can be used as potent hypoglycemic agents and is also reduce many other cardiovascular risk factors including percutaneous coronary intervention, carotid and coronary atherosclerosis. As it plays a very important role in the field of medicinal chemistry or pharmaceutical sciences, novel medicine developed and many are on underdevelopment, these derivatives have thiazolidinedione as their primary nucleus.

Objective::

This article has discussed the different synthetic procedures of thiazolidinediones that exhibited potential antidiabetic activity by the activation of PPAR-γ, by reducing the blood glucose levels and by different metabolic process incorporation.

Conclusion::

Thiazolidinediones has effective profile as the future investigational drug and can be processed in drug discovery because of its efficient anti-diabetic potential.

Recent updates on Synthetic Strategies and Biological Potential of 1,3,4-oxadiazole: Review

Abstract:

Among the large variety of nitrogen and oxygen-containing heterocycles, 1,3,4-oxadiazole, the scaffold, has attracted considerable attention owing to its ability to show an extensive range of pharmacological actions. According to literature investigations, prepared 1,3,4-oxadiazole and its derivative are pharmacologically significant and consist of a variety of activities, such as anticonvulsant, anticancer, antioxidant, anti-inflammatory, antibacterial, antidiabetic, etc. These heterocyclics are formed mainly by the cyclization reactions of various reactants under diverse reaction circumstances. Therefore, significant efforts of organic chemists have been directed towards the synthesis of new drug candidates containing 1,3,4-oxadiazole subunits connected to an established potential pharmacophore to improve the efficacy and potency. This article aims to highlight recent publications on the various synthesis techniques of 1,3,4-oxadiazole and related compounds over the previous ten years (2011–2021). The purpose of this review is to help researchers by summarizing several synthetic strategies for synthesizing oxadiazole.

Synthetic Approach to Potential Anticancer Benzimidazole Derivatives- A Review

Cancer is one of the deadliest diseases in many developed and developing countries. Continuous efforts are required for designing better therapeutic agents for the treatment of cancer with more efficacy, selectivity, and less toxicity. The fused heterocyclic ring system has been identified by several researchers as a privileged structure that can be used as a basis for drug discovery in medicinal chemistry. The hetero-aromatic bicyclic ring system acts as a pharmacophore in a wide range of drugs with therapeutic potential. According to studies in the literature, variously substituted benzimidazoles have distinct pharmacological profiles with multi-targeting ability, making them an important anchor for the production of novel therapeutic agents against complex cancers including breast cancer, skin cancer, and blood cancer. In this presented article we are discussed various synthetic methods for the synthesis of anticancer benzimidazoles and their derivatives in different solvent conditions, substrates, and various catalysts mainly those which are eco-friendly, and economical, which shows the anticancer activity. We also focused on various derivatives are under clinical trials containing Benzimidazole moiety.

Insight into the Isolation, Synthesis and Structure-Activity Relationship of Piperine Derivatives for the Development of New Compounds: Recent Updates

Currently, black pepper commands the leading position among all the spices as a spice of handsome commercial importance in all the world trade and finds its way into the dietary habits of millions of people worldwide. Black pepper is biologically known as Piper nigrum and contains Piperine as the main active chemical constituent. This paper highlights various general methods for extracting Piperine from the crude drug: maceration extraction, Hydrotropic extraction, Accelerated solvent extraction, Thin layer chromatography, and extraction with ethanol & dichloromethane Ionic fluid-based ultrasonic-assisted extraction, etc. In this review, Piperine and its analogs exhibit numerous pharmacological activities and synthetic schemes of Insecticidal activity, Anti-cancer activity, Anti-inflammatory activity, Anti-diabetic activity, Anti-hyperlipidemic activity, Antifungal Activity, Narcotic Activity, etc. The biochemistry of Piperine also has been summarized in the presented article. This very exhaustive review details the complete information about Piperine, its derivatives, and further processing. Moreover, the current survey sums up the new writing identified with Piperine as a remedial specialist against a few illnesses.

Synthesis, Biological Evaluation and Molecular Docking Studies Against EGFR Tyrosine Kinase of 3,5-bis(substituted benzylidene)-1- ethylpiperidin-4-one Analogues

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The compound 4g showed significant anticancer activity with GI50 of 28.2 μM against MCF-7 (Breast cancer cell line). The antioxidant activity of compound 4g (IC50 = 14.98±0.91 μM) was found to be comparable to the standard drug ascorbic acid. The binding modes of compounds 4a-g against the molecular target EGFR tyrosine kinase were also studied. The structure-activity relationship (SAR) was also studied.

:

The compound 4g showed significant anticancer activity with GI50 of 28.2 μM against MCF-7 (Breast cancer cell line). The antioxidant activity of the compound, 4g was found to be comparable to the standard drug ascorbic acid, while its anticancer activity was found to be less than that of the standard drug adriamycin.

Pyridine moiety: An insight into recent advances in treatment of cancer

The incidence of cancer is increasing worldwide, affecting a vast majority of the human population. As new different anticancer agents are being developed now, the requirement is to deal somehow with them and evaluate their safety. Among them, pyridine based drugs are contributing a lot, as it is one of the imperative pharmacophores occurring synthetically as well as naturally in heterocyclic compounds, and having a wide range of therapeutic applications in the area of drug discovery, thereby offering many chances for further improvement in antitumor agents via acting onto numerous receptors of extreme prominence. Many pyridine derivatives have been reported to inhibit enzymes, receptors and many other targets for controlling and curing the global health issue of cancer. Nowadays, in combination with other moieties, researchers are focusing on the development of pyridine-based new derivatives for cancer treatment. Therefore, this review sheds light on the recent therapeutic expansions of pyridine together with its molecular docking, structure-activity-relationship, availability in the market, and a summary of recently patented and published research works that shall jointly help the scientists to produce effective drugs with the desired pharmacological activity.

1,3,4-Oxadiazoles as Potential Pharmacophore for Cytotoxic Potentiality: A Comprehensive Review

Cancer is a kind of disease that has scared many people for many years. Cancer is due to the excessive growth of cells in every particular part of the body. Oxadiazole 1,3,4 is a magical organic moiety that has anticancer potential. Various works on the 1,3,4-oxadiazoles moiety showing anticancer activity have been reported. The present analysis summarizes general synthetic methods for 1,3,4 oxadiazole. Different receptors on which these drug acts are discussed. Pharmacophore models are also presented in this review for topoisomerase-I, histone deacetylase, epidermal growth factor enzymes.

Significance of 1,3,4-Oxadiazole Containing Compounds in New Drug Development

BACKGROUND

Oxadiazole core displays various pharmacological properties among five membered nitrogen heterocyclic compounds, specially 1,3,4-oxadiazole containing molecules that have occupied a particular place in the field of synthetic medicinal chemistry as surrogates (bioisosteres) of carboxylic acids, carboxamides and esters. Moreover, they are having widespread kind of applications in numerous zones as polymers, as luminescence producing materials and as electron- transporting materials and corrosion inhibitors.

METHODS

This study contains comprehensive and extensive literature survey on chemical reactivity and biological properties associated with 1,3,4-oxadiazole containing compounds.

RESULTS

This review summarises 1,3,4-oxadiazole moiety in numerous compounds with reported pharmacological activity such as antiviral, analgesic and anti-inflammatory, antitumor, antioxidant, insecticidal and anti-parasitic, etc. Nevertheless, ring opening reactions of the 1,3,4-oxadiazole core have also made great attention, as they produce new analogues containing an aliphatic nitrogen atom and to other ring systems.

CONCLUSION

In relation to the occurrence of oxadiazoles in biologically active molecules, 1,3,4- oxadiazole core emerges as a structural subunit of countless significance and usefulness for the development of new drug aspirants applicable to the treatment of many diseases. It concludes that 1,3,4-oxadiazole core compounds are more efficacious and less toxic medicinal agents with respect to new opinions in the search for rational strategies.

Synthesis, Cytotoxic Evaluation, and Molecular Docking Studies of N-(7- hydroxy-4-methyl-2-oxoquinolin-1(2H)-yl)acetamide/benzamide Analogues

Background:

Cancer caused nearly 8.8 million deaths in 2015. Limited efficacy, selectivity, drug resistance and toxicity are major complications associated with chemotherapy, potentiating the discovery of anticancer agents.

Methods:

A new series of N-(7-hydroxy-4-methyl-2-oxoquinolin-1(2H)-yl)acetamide/benzamide analogues (5a-j) was prepared from the precursor, 7-hydroxy-4-methyl-2H-chromen-2-one (3), as anticancer agent. The structural assignment of quinolone analogues (5a-j) was based on spectroscopic data analyses. The cytotoxicity was tested on breast cancer cell lines (MCF7 and MDA-MB- 231) by sulforhodamine B (SRB) assay and three dose-related parameters GI50, TGI, and LC50 were calculated.

Results:

2-(2-chlorophenoxy)-N-(7-hydroxy-4-methyl-2-oxoquinolin-1(2H)-yl)acetamide (5a) showed the most potent cytotoxicity against the MCF7 and MDA-MB-231 cancer cell lines with GI50 of 18.7 and 48.1 µM respectively. The glide scores of the compounds, 5a-d were found to be related to the cytotoxicity profile and the emodel scores for ligands, 5a-j were found to be related to significant cytotoxicity.

Conclusion:

Compound 5a exhibited the most potent cytotoxicity and this report may provide some predictions to design more potent novel quinolines as cytotoxic agents.

Influence of biochar and nitrogen on fine root morphology, physiology, and chemistry of Acer mono

Fine roots play an important role in the overall functions of individual plants. Previous studies showed that fertilization and available soil resources have a notably profound effect on fine root, but there is lack of study centered on how fine root morphology, physiology, and chemistry respond to biochar with N additions. Different levels of biochar (0, 10, 15, and 20 g) and N (0, 2, 4 and 6 g) were applied to Acer mono seedling plants in a field nursery. The root system morphology and root chemistry and physiology were evaluated in line with root length, root diameter, SRL, N and N: C and root respiration. Biochar and N significantly affected root morphology, chemistry and root respiration. Morphological, chemical and physiological parameters were found to be at their maximum with 20 g biochar and 6 g N; however, no significant effect was noted on fourth- and fifth-order roots. Furthermore, a significant increase in root respiration was recognized with the increase in root tissue N concentration and the negative relationship of root respiration with higher branch order. Thus, overall, study parameters indicate that biochar and nitrogen positively influence the Acer mono fine root, and therefore should be used to improve fine root health.