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To present an illustrated bird's eye view and comparative analysis of the relative popularity and importance of commercialized African medicinal plants. A comparison is made between the general popularity and commercial importance of the species (as indicated by their footprint on the World Wide Web) and their scientific popularity and importance (as indicated by the number of research publications). The inventory and review is strongly focussed to cover all or most of the medicinal plant raw materials in the international trade that are exported from African countries, with less emphasis on those that are regularly traded on local and regional markets within Africa.
By reduction of AgNO3 in presence of NaBH4, silver nanoparticles were prepared. After mixing silver nanoparticles and extracts, coating was given on nanoparticles using polyaniline. Prepared nanoparticles were characterized by Visual, UV, FTIR spectroscopy, SEM techniques, and TEM analysis.
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Coccinia indica leaves were extracted with 60% ethanol, solvents were evaporated and the residue was suspended in water. This suspension was administered orally at a dose of 200 mg/kg body wt. after 18 h of fasting to normal fed and streptozotocin-induced male diabetic rats (180-250 g). After 90 min the rats were killed, and blood-glucose, hepatic glucose-6-phosphatase, fructose-1,6-bisphosphatase and glucose-6-phosphate dehydrogenase (G6PDH) and red-cell G6PDH were assayed. Blood sugar was depressed by 23% (P < 0.01) and 27% (P < 0.001) in the normal fed and streptozotocin-diabetic rats respectively compared with controls which were given distilled water. Hepatic glucose-6-phosphatase and fructose-1,6-bisphosphatase activities were depressed by 32% (P < 0.001) 30% (P < 0.05) respectively in the streptozotocin-diabetic rats, compared with 19% (P < 0.02) and 20% (P < 0.01) depression in the normal fed controls, whereas both the red-cell and hepatic G6PDH activities were found to be elevated by feeding the extract in the streptozotocin-diabetic and in the normal fed controls. Similar results were obtained with the 95%-ethanolic extract of Momordica charantia. Taken together, these results indicate that Coccinia indica and Momordica charantia extracts lowered blood glucose by depressing its synthesis, on the one hand through depression of the key gluconeogenic enzymes glucose-6-phosphatase and fructose-1,6-bisphosphatase and on the other by enhancing glucose oxidation by the shunt pathway through activation of its principal enzyme G6PDH.
Two novel pentanorcucurbitane triterpenes, 22-hydroxy-23,24,25,26,27-pentanorcucurbit-5-en-3-one (1) and 3,7-dioxo-23,24,25,26,27-pentanorcucurbit-5-en-22-oic acid (2) together with a new trinorcucurbitane triterpene, 25,26,27-trinorcucurbit-5-ene-3,7,23-trione (3) were isolated from the methyl alcohol extract of the stems of Momordica charantia. The structures of the new compounds were elucidated by spectroscopic methods. Compounds 2 and 3 showed potent cytoprotective activity in tert-butyl hydroperoxide (t-BHP)-induced hepatotoxicity of HepG2 cells.
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Proteinase inhibitors (PIs) from the seeds of bitter gourd (Momordica charantia L.) were identified as strong inhibitors of Helicoverpa armigera gut proteinases (HGP). Biochemical investigations showed that bitter gourd PIs (BGPIs) inhibited more than 80% HGP activity. Electrophoretic analysis revealed the presence of two major proteins (BGPI-1 and-2) and two minor proteins (BGPI-3 and-4) having inhibitory activity against both trypsin and HGP. The major isoforms BGPI-1 and BGPI-2 have molecular mass of 3.5 and 3.0 kDa, respectively. BGPIs inhibited HGP activity of larvae fed on different host plants, on artificial diet with or without added PIs and proteinases excreted in fecal matter. Degradation of BGPI-1 by HGP showed direct correlation with accumulation of BGPI-2-like peptide, which remained stable and active against high concentrations of HGP up to 3 h. Chemical inhibitors of serine proteinases offered partial protection to BGPI-1 from degradation by HGP, suggesting that trypsin and chymotrypsin like proteinases are involved in degradation of BGPI-1. In larval feeding studies, BGPIs were found to retard growth and development of two lepidopteran pests namely Helicoverpa armigera and Spodoptera litura. This is the first report showing that BGPIs mediated inhibition of insect gut proteinases directly affects fertility and fecundity of both H. armigera and S. litura. The results advocate use of BGPIs to introduce insect resistance in otherwise susceptible plants.
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We present two cases of extreme neglect with injuries. These are perfect examples of gender bias. Our first case is a 20-day-old female neonate was brought to the pediatric emergency department with multiple rat bites to the face. A 9-month-old female infant was brought to the emergency care division with multiple rat bites on the eyes and upper extremities. These cases point towards the existing gender bias and extreme social neglect of females in the Indian society.
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Allergenicity of three plant abortifacient proteins, trichosanthin (TCS), alpha-momorcharin (alpha-MMC) and beta-momorcharin (beta-MMC) and the kinetics of IgE antibody response against these proteins were studied in C57BL/6N and BALB/cAn mice. These proteins were purified from Chinese medicinal herbs, characterized by biochemical and immunological procedures and found to be homogeneous by PAGE, SDS-PAGE and immunoelectrophoresis. The results obtained were summarized as follows: 1) different levels of IgE antibody responses against TCS, alpha-MMC and beta-MMC were induced when they were injected i.p. as antigen adsorbed onto AI(OH)3 gel into BALB/cAn or C57BL/6N mice on day 0 and day 28; 2) the allergenicity of the proteins was in the order of beta-MMC greater than alpha-MMC greater than TCS; 3) two injections of 10 micrograms or 50 micrograms of TCS or alpha-MMC given at 4 weeks interval without adjuvant elicited a low or undetectable PCA titer, while the same dose given weekly for 5 weeks resulted in high levels of IgE production; and 4) on the basis of PCA observations, no cross immunological reactivity among these three proteins was found, it seemed to support that TCS, alpha-MMC and beta-MMC may be alternately used for inducing abortion.
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M. charantia L. plant material was acquired in municipality of Malta, Paraiba, Brazil. The extract was obtained through maceration, filtration and then concentrated under reduced pressure in a rotary evaporator, resulting in a dough, and was then dried in an oven for 72 hours at 40°C. Antimicrobial action of ethanolic extract of seed M. charantia L. was evaluated based on the minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC) and minimum fungicidal concentration (MFC) against standard strains of bacteria, isolates multiresistant bacteria and Candida species, by microdilution in broth method.
Ten healthy men undergoing evaluation for infertility provided 10 semen specimens.
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Diet is now one of the well established means in the management of diabetes. Bitter gourd and spent turmeric at 10% level were tested for their efficacy on glycosaminoglycan metabolism in various tissues viz., liver, spleen, lungs, heart and testis in control, diabetic and treated rats. The glycosaminoglycans (GAGs) were isolated from defatted and dried tissues. The contents of sulfated GAGs decreased in all the tissues and the decrease was more prominent in heart and testis. In the isolated GAGs, contents of total sugar, amino sugar, uronic acid and sulfate were studied. Decrease in total sugar content was maximum in testis. Amino sugar content decreased considerably in testis (38%) and lungs (15%). The content of uronic acid also decreased in testis (33%) besides heart (29%) and liver (25%). Sulfate groups in GAGs perform pivotal functions in many biological events and decrease in sulfate content was significant in heart (40%), testis (37%) and liver (37%). GAGs profile on the cellulose acetate electrophoresis revealed that heparan sulfate (HS), hyaluronic acid (HA) and chondroitin sulfate/dermatan sulfate (CS/DS) were present in liver, spleen and lungs. HS, CS were present in heart, DS/CS was observed in testis. The observed beneficial effects in GAGs metabolism during diabetes may be due to the presence of high amounts of dietary fibres present in bitter gourd and spent turmeric, besides, possible presence of bioactive compounds in one or both of them.
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The experimental data revealed that M. charantia showed significant wound healing and anti-inflammatory effect.
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The method is simple and reliable for determination of aglycone of momordicoside L in M. charantia.
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To explore the effect of PEGylation of alpha-Momorcharin (alpha-MMC), one of ribosome-inactivating proteins from bitter melon seed, against its hepatotoxicity in rats.
Sensitivity of 100 Plasmodium falciparum isolates to chloroquine, quinine, amodiaquine, mefloquine, sulphadoxine/pyrimethamine, artemisinin, Momordica charantia ('Ejirin') Diospyros monbuttensis ('Egun eja') and Morinda lucida ('Oruwo') was determined using the in vitro microtest (Mark III) technique to determine the IC50 of the drugs. All the isolates tested were sensitive to quinine, mefloquine and artesunate. Fifty-one percent of the isolates were resistant to chloroquine, 13% to amodiaquine and 5% to sulphadoxine/pyrimethamine. Highest resistance to chloroquine (68.9%) was recorded among isolates from Yewa zone while highest resistance to amodiaquine (30%) was observed in Ijebu zone. Highest resistance to sulphadoxine/pyrimethamine was recorded in Yewa and Egba zones, respectively. A positive correlation was observed between the responses to artemisinin and mefloquine (P<0.05), artemisinin and quinine (P<0.05) and quinine and mefloquine (P<0.05). A negative correlation was observed between the responses to chloroquine and mefloquine (P>0.05). Highest anti-plasmodial activity was obtained with the ethanolic extract of D. monbuttensis (IC50 = 3.2 nM) while the lowest was obtained from M. lucida (IC50 = 25 nM).
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In this study, the milk-soymilk and milk-soymilk supplemented with Momordica charantia , a common oriental vegetable possessing medicinal activities, were fermented by lactic bacteria. The objective of this study was to investigate the effects of milk-soymilk and fermented milk-soymilk with or without M. charantia on atherosclerosis in hyperlipidemic hamsters. Fermented 25% milk and 75% soymilk combinations, supplemented with 1% M. charantia solution, can improve the acceptability of the fermented beverage. A total of 72 male Golden Syrian hamsters were divided into 9 groups (n = 8/group), and experimental diets were provided with a normal diet for the normal group and a high-cholesterol diet for others. The milk-soymilk and fermented milk-soymilk with or without M. charantia were administrated for 8 weeks. The milk-soymilk and fermented milk-soymilk with and without M. charantia were able to significantly decrease (p < 0.05) the serum cholesterol and the atherosclerotic plaque in aorta based on the comparison to the high-cholesterol diet (H) group. The groups on fermented milk-soymilk by Lactobacillus plantarum NTU 102 with or without M. charantia could significantly decrease (p < 0.05) the ratio of low-density lipoprotein cholesterol (LDL-C) to high-density lipoprotein cholesterol (HDL-C). The femented milk-soymilk by Lactobacillus paracasei subsp. paracasei NTU 101 supplemented with M. charantia had an anti-atherosclerotic activity by increasing superoxide dismutase (SOD) and total antioxidant status (TAS) activity of the blood and relieving the degree of thiobarbituric acid reactive substances (TBARS) compared to the other treatments. It is concluded that the milk-soymilk and the fermented milk-soymilk supplemented with or without M. charantia by L. paracasei subsp. paracasei NTU 101 are effective in preventing and retarding the hyperlipidemia-induced oxidative stress and atherosclerosis.
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The diabetic group exhibited delayed wound healing as compared to the normal group. Interestingly, the diabetic group treated with topical MC extract showed better results than the nontreated group.
We have previously reported that a crude extract from the bitter melon (Momordica charantia) killed human leukemic lymphocytes in a dose-dependent manner while not affecting the viability of normal human lymphocyte cells at these same doses (Takemoto et al., 1980). We now report that the crude preparation has both cytostatic and cytotoxic activities which are heat stable and trypsin-sensitive. Time and dose-response curves suggest that the factors act quickly, perhaps by entry into the cell. The effects of the crude extract are complete after only 2 hr of exposure. These activities are not due to the presence of the lectins from bitter melon seeds, as these purified proteins had no activity against human lymphocytic cells.
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The objective of this study was to evaluate the antistress activity of Momordica charantia (MC) fruit extract on stress-induced changes in albino rats and also to explore attenuating effects of MC on in vitro lipid peroxidation in rat brain.
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Recent research on nanoparticles in a number of crops has evidenced for enhanced germination and seedling growth, physiological activities including photosynthetic activity and nitrogen metabolism, mRNA expression and protein level, and also positive changes in gene expression indicating their potential use in crop improvement. We used a medicinally rich vegetable crop, bitter melon, as a model to evaluate the effects of seed treatment with a carbon-based nanoparticle, fullerol [C60(OH)20], on yield of plant biomass and fruit characters, and phytomedicine contents in fruits.
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Global cerebral ischemia induced by occluding both common carotid arteries for 10 min followed by 24 h reperfusion was used to induce neuronal injury. Ischemia-reperfusion induced neuronal injury was evaluated in terms of cerebral infarct size, generation of free radicals measured as thiobarbaturic acid reactive substances (TBARS), and neurological functions measured as short term memory and motor activity.
The aim of the present study was to evaluate the effect of the aqueous extract of seeds of two varieties, namely a country and hybrid variety of Momordica charantia (MCSEt1 and MCSEt2) on oxidative stress in plasma and pancreas of streptozotocin (STZ) induced diabetic rats. Oral administration of each of the seed extracts at a dosage of 150 mg/kg body weight for 30 d resulted in a significant reduction in plasma glucose, thiobarbituric acid-reactive substances, lipid-hydroperoxides, alpha-tocopherol and significant improvement in ascorbic acid, reduced glutathione and insulin. The treatment also resulted in a significant reduction in thiobarbituric acid reactive substances, lipid-hydroperoxides, superoxide dismutase, catalase, glutathione peroxidase and significant improvement in reduced glutathione in pancreas of drug treated diabetic rats when compared to the untreated diabetic rats. On the basis of results obtained, it may be concluded that the treatment of Momordica charantia seed varieties may effectively normalize the impaired oxidative stress in streptozotocin induced-diabetes than the glibenclamide treated groups.