Diabetes mellitus is often caused by damage to pancreatic beta cells which play a role in secreting insulin in the body. Damage to pancreatic beta cells causes the body to lack insulin. Dipeptidyl peptidase-4 (DPP-4) is a peptidase enzyme complex located on the surface of the cell membrane. Inhibition of the DPP4 enzyme will increase blood GLP-1 levels and induce regeneration of pancreatic beta cells. Senggani leaf (Melastoma malabathricum) boiled water is believed by the people of the Ciamis area to be used as a diabetes medicine. There have been many studies and reviews related to Senggani (Melastoma malabathricum) and its potential. This review focuses on the discussion of Senggani as an antidiabetic by analyzing the reduction in glucose levels and the repair ability of pancreatic beta cells. The results of the literature study that show that senggani leaves have the ability to reduce blood glucose levels and repair activity of pancreatic beta cells through the DPP-4 enzyme inhibition mechanism supported by molecular docking simulation data. There are 12 active compounds that have a binding site similarity above 50% with the comparison compound vildagliptin. Rutin is the best active compound which has a 100% similarity of the binding site. Based on in vivo research and toxicity analysis on the admetsar database, senggani leaf extract and active compounds of senggani leaves have low toxicity, making it safe to be used as antidiabetic herbal preparations.
Damage to cells caused by stress can be reduced by the presence of antioxidants, one of which is Superoxide dismutase (SOD). The role of the active ingredients of black tea and turmeric will be studied using the in-silico method to identify the active compounds as components in SOD activation. The bioavailability and toxicity of the active compounds of black tea and turmeric were studied and followed by molecular docking and virtual games. The parameters studied are Gibbs's free energy (∆G) and binding site similarity (BSS). The results were analyzed using Gibbs's free energy (∆G) and binding site similarity (BSS) parameters. It was found that those that could increase the activity of Cu/Zn SOD enzymes were Epicatechin gallate (black tea) and curcumin (turmeric), with values of -9.5 and -7.4 Kcal/mol and the same BSS value of 81.8%. The control ligand used was beta amyrin. According to Lipinski's rules, Epicatechin gallate and curcumin compounds can be absorbed well and are safe for consumption. This study concludes that Epicatechin gallate, an active compound of black tea, and curcumin, an active compound of turmeric rhizome, have the best potential to increase the activity of Cu/Zn SOD enzymes based on the results of virtual screening and molecular docking. Epicatechin gallate and curcumin are predicted to be well absorbed by the body because they qualify Lipinski's rules and are not toxic and safe for consumption.
Alzheimer's Disease (AD) is one of the consequences of impaired functioning of acetylcholine which can be hydrolyzed by the enzyme acetylcholinesterase. Alzheimer's treatment is carried out using two approaches, namely compounds (acetylcholinesterase inhibitors) and noncholinergics (antioxidants). There are commercial drugs that can slow the progression of Alzheimer's, but their use can cause excessive side effects. The use of herbal plants as a cure for Alzheimer's disease has been proven to be safer and does not cause excessive side effects. Herbal plants that can be used and developed are black tea, red betel, curcuma, and cinnamon. This study determined that extracts of black tea, red betel leaf, curcuma, and cinnamon's formula have the best antioxidant activity and level of inhibition of the acetylcholinesterase enzyme. F1 (cinnamon), F5 (cinnamon, black tea, red betel, and curcuma), F6 (cinnamon and black tea), and F11 (cinnamon, black tea, and curcuma) were the best formulations in each type of sample based on inhibitory AChE enzymes and antioxidants activity. F1 (cinnamon) is the most effective extract out of all formulations analyzed in this study. Keywords: Acetylcholinesterase; Alzheimer; Black Tea; Cinnamon; Red Betel; Curcuma
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