Biofabricated Green Synthesized Hibiscus Silver Nanoparticles Potentiate Antibacterial Activity and Cytotoxicity in Human Lung Cancer Cells.

Traditional medicine has long employed the shrub Hibiscus sabdariffa to treat a variety of illnesses. The biochemical characteristics of silver nanoparticles made using the plant extract of Hibiscus sabdariffa were examined in this work. According to the results, the plant extract of Hibiscus sabdariffa had a total phenolic quantity of 84.9 mg/gm and a total quantity of flavonoids of 41.50 mg/gm. The extract also showed antibacterial action against Escherichia coli and Staphylococcus aureus (75.15% scavenging activity). The silver nanoparticles of plant extracts were stable in PBS solution for at least 30 days and had a mean size of particles of 21.22 nm. Silver nanoparticles were shown to both be cytotoxic on human lung cancer cell line A-549 and have anti-inflammatory action. Overall, the research's findings demonstrate the fascinating biological activity of the silver nanoparticles made from the extract of the Hibiscus sabdariffa plant. To assess these compounds' potential as medicines, more research is required.

Role of cytokine in malignant T-cell metabolism and subsequent alternation in T-cell tumor microenvironment.

T cells are an important component of adaptive immunity and T-cell-derived lymphomas are very complex due to many functional sub-types and functional elasticity of T-cells. As with other tumors, tissues specific factors are crucial in the development of T-cell lymphomas. In addition to neoplastic cells, T- cell lymphomas consist of a tumor micro-environment composed of normal cells and stroma. Numerous studies established the qualitative and quantitative differences between the tumor microenvironment and normal cell surroundings. Interaction between the various component of the tumor microenvironment is crucial since tumor cells can change the microenvironment and vice versa. In normal T-cell development, T-cells must respond to various stimulants deferentially and during these courses of adaptation. T-cells undergo various metabolic alterations. From the stage of quiescence to attention of fully active form T-cells undergoes various stage in terms of metabolic activity. Predominantly quiescent T-cells have ATP-generating metabolism while during the proliferative stage, their metabolism tilted towards the growth-promoting pathways. In addition to this, a functionally different subset of T-cells requires to activate the different metabolic pathways, and consequently, this regulation of the metabolic pathway control activation and function of T-cells. So, it is obvious that dynamic, and well-regulated metabolic pathways are important for the normal functioning of T-cells and their interaction with the microenvironment. There are various cell signaling mechanisms of metabolism are involved in this regulation and more and more studies have suggested the involvement of additional signaling in the development of the overall metabolic phenotype of T cells. These important signaling mediators include cytokines and hormones. The impact and role of these mediators especially the cytokines on the interplay between T-cell metabolism and the interaction of T-cells with their micro-environments in the context of T-cells lymphomas are discussed in this review article.

A fraction of Pueraria tuberosa extract, rich in antioxidant compounds, alleviates ovariectomized-induced osteoporosis in rats and inhibits growth of breast and ovarian cancer cells.

Pueraria tuberosa (Roxb. ex Willd.) DC., known as Indian Kudzu belongs to family Fabaceae and it is solicited as "Rasayana" drugs in Ayurveda. In the present study, we analyzed the efficacy of an ethyl acetate fraction from the tuber extract of Pueraria tuberosa (fraction rich in antioxidant compounds, FRAC) against menopausal osteoporosis, and breast and ovarian cancer cells. The FRAC from Pueraria tuberosa was characterized for its phenolic composition (total phenolic and flavonoid amount). Antioxidant property (in vitro assays) of the FRAC was also carried out followed by the analysis of the FRAC for its antiosteoporotic and anticancer potentials. The antiosteoporotic activity of FRAC was investigated in ovariectomy-induced osteoporosis in rats. The cytotoxicity effect was determined in breast and ovarian cancer cells. Gas chromatography/mass spectrometry (GC/MS) analysis of the FRAC was performed to determine its various phytoconstituents. Docking analysis was performed to verify the interaction of bioactive molecules with estrogen receptors (ERs). The FRAC significantly improved various biomechanical and biochemical parameters in a dose-dependent manner in the ovariectomized rats. FRAC also controlled the increased body weight and decreased uterus weight following ovariectomy in rats. Histopathology of the femur demonstrated the restoration of typical bone structure and trabecular width in ovariectomized animals after treatment with FRAC and raloxifene. The FRAC also exhibited in vitro cytotoxicity in the breast (MCF-7 and MDA-MB-231) and ovarian (SKOV-3) cancer cells. Furthermore, genistein and daidzein exhibited a high affinity towards both estrogen receptors (α and ß) in the docking study revealing the probable mechanism of the antiosteoporotic activity. GC/MS analysis confirmed the presence of other bioactive molecules such as stigmasterol, ß-sitosterol, and stigmasta-3,5-dien-7-one. The FRAC from Pueraria tuberosa has potential for treatment of menopausal osteoporosis. Also, the FRAC possesses anticancer activity.

A steroidal derivative from Trigonella foenum graecum L. that induces apoptosis in vitro and in vivo.

Trigonella foenum graecum L. is a dietary herb used in traditional medicine system. In this study, we investigated the cytotoxicity, antitumor, antimetastatic and antiangiogenic effect of the steroidal compound, ethyl iso-allocholate isolated from T. foenum graecum L. seeds against A549 lung cancer cells in vitro and in vivo. Among all the isolated compounds, the ethyl iso-allocholate rendered the highest cytotoxicity potential. It showed least percentage cell viability in trypan blue assay and lowest nuclei count in hoechst staining. The caspase glo assay and western blot analysis showed the significant caspase 3 cleavage, indicating caspase dependent apoptosis. Consistent with the in vitro data, ethyl iso-allocholate showed highest percentage tumor growth inhibition i.e. 80 ± 5% in zebrafish, equivalent to doxorubicin. It significantly reduced angiogenesis to 5 ± 0.8% (**P < 0.01), compared to negative control group which was 60 ± 2%. The ethyl iso-allocholate showed 55 ± 3% inhibition in liver metastasis. To investigate the safety of the compounds on normal tissues, the percentage mortality was examined. The ethyl iso-allocholate showed zero percent mortality of zebrafish. These results indicate that the steroidal derivative isolated from T. foenum-graecum seeds induces caspase dependent apoptosis in cancer cells and reduces tumor growth, metastasis and angiogenesis in vivo, as well as it is safe on the normal tissues. The in vitro and in vivo anticancer studies suggest that the cytotoxic compound ethyl iso-allocholate has potential application in pharmaceutical industry.

Antioxidant and anticancer activities of green synthesized silver nanoparticles using aqueous extract of tubers of Pueraria tuberosa.

In the present study, we have synthesized silver nanoparticles (AgNPs) using Pueraria tuberosa aqueous extract (PTAE) in a straightforward manner without involvement of toxic chemicals. Various reaction parameters (reaction time, AgNO3 concentration, pH, reaction temperature and PTAE concentration) were optimizeded for the synthesis of AgNPs through visual observation of colour change and absorption peak by UV-Vis spectroscopy. The green synthesized AgNPs were analyzed by DLS, FTIR, SEM, TEM, EDS and XRD for their bio-physical characteristics. The AgNPs were screened for their antioxidant activity by determining total antioxidant capacity (TAC) and anticancer potential by MTT assay. The average particle size of AgNPs was 162.72 ± 5.02 nm with zeta potential of -30.14 ± 2.08 mV. The spherical shape of the AgNPs was confirmed by SEM and TEM. FTIR spectra showed the involvement of different phytoconstituents as capping and stabilizing agents in the synthesis of AgNPs. The TAC of the optimized synthesized AgNPs was more than PTAE. The IC50 of synthesized AgNPs against MCF-7, MDA-MB-231, SKOV-3, U-87 and NCI/ADR cell lines was 3.859, 1.128, 29.36, 6.053 and 25.49 µg/ml, respectively. The green synthesized AgNPs has potential for use in the treatment of different types of cancer.

Natural Compounds A Weapon to Ameliorate Breast Cancer Cells: A Review.

Breast cancer is the heterogeneous disease and leading cause of death in women, worldwide. It is generally caused by the perturbation of various signaling pathways responsible for cell apoptosis. Due to genetic variability, different signaling pathways are disrupted in different breast cancer patients; so, to overcome this multifaceted condition, the personalized treatment is preferred. Since, various potential targets exist in breast cancer cells; it raised the need of new prospective of lead compounds. A large number of evidences show that, due to the presence of various secondary metabolites in plants, natural compounds are frequently examined for search of new bioactive molecules. This review includes the pathological aspects of breast cancer and the effect of natural compounds on breast cancer cells along with their possible mechanism of action. (Databases searched were PubMed, Science Direct, Web of Knowledge, Scopus, and Google Scholar).

Experimental techniques for screening of antiosteoporotic activity in postmenopausal osteoporosis.

Postmenopausal osteoporosis, a silent epidemic, has become a major health hazard, afflicting about 50% of postmenopausal women worldwide and is thought to be a disease with one of the highest incidences in senile people. It is a chronic, progressive condition associated with micro-architectural deterioration of bone tissue that results in low bone mass, decreased bone strength that predisposes to an increased risk of fracture. Women are more likely to develop osteoporosis than men due to reduction in estrogen during menopause which leads to decline in bone formation and increase in bone resorption activity. Estrogen is able to suppress the production of proinflammatory cytokines like interleukin (IL)-1, IL-6, IL-7 and tumor necrosis factor (TNF-α). This is why these cytokines are elevated in postmenopausal women. In this review article we have made an attempt to collate the various methods and parameters most frequently used for screening of antiosteoporotic activity in postmenopausal osteoporosis. Pertaining to ovariectomized animal model, this is the most appropriate model for studying the efficacy of different drugs to prevent bone loss in postmenopausal osteoporosis.