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Pharmacological properties of extracts and phytochemicals, such as flavonoids and terpenoids remain of great interest. In this work, the effect of extracts, friedelan-3,21-dione and 3β-O-D-glucosyl-sitosterol isolated from Tontelea micrantha roots were evaluated against Staphylococcus aureus, Bacillus subtilis, Klebsiella pneumoniae, Klebsiella oxytoca and Escherichia coli. The antibacterial activity was evaluated by the broth microdilution method through the minimum inhibitory and bactericidal concentrations (MIC, MBC). Synergism activity was evaluated using the Checkerboard method, through the FICI. The cytotoxicity of these substances was performed by the MTT method using Vero cells. Additionally, possible biological effects of the two compounds were predicts through PASS software. Chloroform and hexane extracts showed remarkable antibacterial activity (MIC=4.8-78.0 µg/mL) suggesting an action that did not affect membrane integrity. The combination of extracts with streptomycin generated a strong synergistic effect, decreasing the MIC of the antibiotic and extracts. The extracts were highly toxic to Vero cells and the two terpenoids isolated from them did not present detectable cytotoxicity (CC50>1000μg/mL). However, the extracts obtained from the T. micrantha roots significantly inhibited bacterial growth and are considered very promising against the pathogenic bacteria. The results of cytotoxicity in Vero cells were quite relevant and could be tested for other bioassays.
Pharmacological properties of extracts and phytochemicals, such as flavonoids and terpenoids remain of great interest. In this work, the effect of extracts, friedelan-3,21-dione and 3β-O-D-glucosyl-sitosterol isolated from Tontelea micrantha roots were evaluated against Staphylococcus aureus, Bacillus subtilis, Klebsiella pneumoniae, Klebsiella oxytoca and Escherichia coli. The antibacterial activity was evaluated by the broth microdilution method through the minimum inhibitory and bactericidal concentrations (MIC, MBC). Synergism activity was evaluated using the Checkerboard method, through the FICI. The cytotoxicity of these substances was performed by the MTT method using Vero cells. Additionally, possible biological effects of the two compounds were predicts through PASS software. Chloroform and hexane extracts showed remarkable antibacterial activity (MIC=4.8-78.0 µg/mL) suggesting an action that did not affect membrane integrity. The combination of extracts with streptomycin generated a strong synergistic effect, decreasing the MIC of the antibiotic and extracts. The extracts were highly toxic to Vero cells and the two terpenoids isolated from them did not present detectable cytotoxicity (CC50>1000μg/mL). However, the extracts obtained from the T. micrantha roots significantly inhibited bacterial growth and are considered very promising against the pathogenic bacteria. The results of cytotoxicity in Vero cells were quite relevant and could be tested for other bioassays.
Abstract:: Across the globe, approximately half of the population diagnosed with diabetes use complementary medicines for the treatment of diabetes. Salacia reticulata (family Hypocrataceae), is an indigenous woody climber flowering plant commonly employed within the Ayurvedic healthcare framework for addressing diabetes and obesity. It is also known as KothalaHimbutu and grows in the dry zone forests of India and Sri Lanka. It is documented to exhibit antioxidant, lipid-lowering, hypertrophy- reducing, and fibrosis-inhibiting properties and hepatoprotective activity. We critically analyze the available in-vitro, animal, and clinical research supporting the utilization of Salacia reticulata in managing type 2 diabetes and obesity. Compounds that have been recognized for their ability to counteract diabetes include salacinol, kotalanol, ponkoranol, and salaprinol. Various invitro research depicted salacia's capacity to impede intestinal alpha-glucosidase function. Furthermore, it enhances the breakdown of stored fat (lipolysis) and reduces insulin resistance by increasing the production of messenger RNA for hormone-sensitive lipase (HSL) as well as adiponectin, respectively, in the mouse mesenteric fat. Salacia reticulata treatment up-regulates the lipolysis factors while downregulating the 3T3-L1 adipocytes lipogenesis factors. Both animal studies and clinical research consistently showed significant improvement in levels of glucose when fasting compared to being exposed to sucrose and maltose. Furthermore, 6 weeks to 3 months of treatment showed a substantial reduction in the HbA1C and plasma Insulin. Salacia reticulata efficiently decreases obesity and insulin resistance while enhancing glucose metabolism therefore, more substantial evidence derived from meticulously designed research is necessary to confirm its effectiveness and safety. Moreover, the research aimed at improving the growth of callus, increasing polyphenolic content, promoting mangiferin synthesis, and assessing the biological properties of the salaciagenus suggests its potential as a valuable source for the industrial production of important industrial secondary compounds. At the same time, data indicate cumulative knowledge, highlighting its strong antioxidant effect and unveiling its capabilities without impacting natural reserves.
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