@article {622, title = {Hydroalcoholic and Alkaloidal Extracts of Murraya koenigii(L.) Spreng Augments Glucose Uptake Potential against Insulin Resistance Condition in L6 Myotubes and Inhibits Adipogenesis in 3T3L1 Adipocytes}, journal = {Pharmacognosy Journal}, volume = {10}, year = {2018}, month = {June 2018}, pages = {633-639}, type = {Original Article}, chapter = {633}, abstract = {

Background: Murraya koenigii, commonly known as \“curry leaves\” is native to India. The highly valued part of the plant is the leaves which possess various biological activities. Objective: The present study aimed to investigate the antidiabetic effect of Murraya koenigii (MK) leaf extracts, of two different solvent ratios. Materials and methods: 70\% hydroalcoholic and alkaloidal extracts of MK leaves were prepared by cold maceration method. Preliminary phytochemical analysis was carried out for both the extracts. In vitro anti diabetic activity was screened by inhibitory action on \α \– amylase, \α \– glucosidase enzymes. Further, the 70\% hydroalcoholic and alkaloidal extracts were assessed for glucose uptake potential, anti - adipogenic property, as well as inhibitory activity on diabetes associated complications. HPTLC quantification of major phytoconstituent was carried out. Results: The study showed presence of various phytoconstituents such as, polyphenols, alkaloids, tannins, reducing sugars etc. The 70\% hydroalcoholic and alkaloidal extracts of MK leaves exhibited \>90\% inhibition against carbohydrate metabolising enzymes compared to aqueous and absolute alcohol extracts. Both the extracts showed enhanced glucose uptake in L6 myotubes attenuating the effect of Palmitate induced insulin resistance. Significant inhibition on adipogenesis was exerted by both 70\% hydroalcoholic and alkaloidal extracts of MK leaves. Besides, marked inhibition of advanced glycation end products was exhibited by the extracts. HPTLC quantification analysis of the aforementioned extracts showed the presence of major phytoconstituent, Mahanine, in it. Conclusion: The results of the present study showed that MK possesses significant antidiabetic property and also exhibited considerable effect in preventing diabetes associated complications. The potent antidiabetic activity of MK could be attributed to the presence of Mahanine, the major active constituent, which is a carbazole alkaloid.

}, keywords = {complications, Diabetes, glucose uptake, L6 myotubes, Mahanine, α - amylase}, doi = {10.5530/pj.2018.4.104}, url = {http://fulltxt.org/article/642}, author = {Parameswari Royapuram Parthasarathy and Janani Murthy and Dinesh Murugan Girija and Srivani Telapolu and Chamundeeswari Duraipandian and Thyagarajan Sadras Panchatcharam} } @article {460, title = {Aristolochia bracteolata Enhances Wound Healing in vitro through Anti-inflammatory and Proliferative Effect on Human Dermal Fibroblasts and Keratinocytes}, journal = {Pharmacognosy Journal}, volume = {9}, year = {2017}, month = {November 2017}, pages = {s129-s136}, type = {Original Article}, chapter = {s129}, abstract = {

Objective: In the present study, we examined the effect of Aristolochia bracteolata extract on Human dermal fibroblast (HDF) and Human keratinocyte cell line (HaCaT) proliferation and migration during in vitro wound healing and its underlying mechanism. Method: A. bracteolata was collected and extracted using methanol. Cytotoxiciy effect of plant extract was determined by MTT assay in HDF and HaCaT. In vitro Scratch assay determined the effect of plant extracts on migration of cells and its underlying mechanism was determined by RT-PCR analysis. Result: The plant extract of A. bracteolata selectively inhibited proliferation of both the cells at higher concentration (\>100 \μg/mL) and at lower concentrations (\<25 \μg/mL), it exhibited linear and dose-dependent cell proliferation. IC50 value was 87.60\±1.67 \μg/mL for HDF and 85.50\±1.65 \μg/mL after 24 h treatment. In vitro scratch wound healing studies showed wound closure of 50.38\%\±1.39 and 69.81\%\±1.89 at a concentration of 25 \μg/mL after 24 h and 48 h, respectively. The extract was tested for anti-inflammatory activity by determination of inhibitory activity on lipopolysaccharide (LPS) induced nitric oxide (NO) production in RAW 264.7 cell lines. We found that A. bracteolata has a strong inhibitory effect on the production of NO and tumor necrosis factor-\α (TNF-\α). The plant extract of A. bracteolata inhibited inducible nitric oxide synthase (iNOS) gene expression by lipopolysaccharide (LPS). To explore the mechanism responsible for the inhibition of iNOS, gene expression was analyzed by Real- Time PCR. A. bracteolata showed a decrease in the expression of pro-inflammatory cytokine mRNA in a concentration-dependent manner. Treatment with the plant extract resulted in enhanced expression of Collagen 1 a (I) and Collagen IV in HDFs by regulating the mRNA levels of extracellular matrix (ECM) proteins and Matrix metalloproteinase-2. Conclusion: Thus, the present investigation scientifically validates the use of A. bracteolata in wound healing.

}, keywords = {A. bracteolata, Fibroblast, Keratinocytes, RAW 264.7, Scratch assay, Wound Healing}, doi = {10.5530/pj.2017.6s.169}, url = {http://fulltxt.org/article/394}, author = {Dinesh Murugan Girija and Mangathayaru Kalachaveedu and Rajasekaran Subbarayan and Preethi Jenifer and Suresh Ranga Rao} }