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2020-02-26 Research Article

In silico discovery of potential inhibitors against Dipeptidyl Peptidase-4: A major biological target of Type-2 diabetes mellitus

Abstract

Objectives: Type-2 diabetes mellitus, caused by impaired secretion of insulin, is becoming one of the health hazardous threats to human lives across the world. Its prevalence is rising with time. In this study, 2750 phytochemicals, that are considered to have great ability to eliminate diseases caused by different viruses and bacteria, are obtained from different medicinal plants and discovery of inhibitors through in silico method was performed against Dipeptidyl peptidase-4 (DPP4).

Method: The pharmacological assessment and pharmacokinetics of phytochemicals, molecular docking and density functional theory (DFT) analysis helped to explore the inhibitory action of phytochemicals against DPP4. Total forty-nine phytochemicals were screened initially to reduce the number of compounds to be analyzed further based on a threshold of binding affinity ≥ -5.5 kcal/mol and were considered for further computational studies to analyze their inhibitory effects for DPP4. For comparison and validation of the results of present study, various previously reported and experimentally validated compounds were docked with the DPP4. For these dockings, binding affinity was predicted and compared with those of phytochemicals to check if these phytochemicals are competent enough to be used as an inhibitor in the treatment of diabetes mellitus in the future.

Results: Only four phytochemicals showed binding affinity greater than those of experimentally validated compounds. These included two phytochemicals from Silybum marianum, i.e. Diprenyleriodictyol and Taxifolin and while other two phytochemicals from Santolina insularis and Erythrina Varigatae i.e. Papraline and Osajin respectively. The reactivity levels for these four phytochemicals with the binding site residues of DPP4 were obtained by DFT based analysis, in which ELUMO, EHOMO and band energy gap were computed.

Conclusion: Based on these results, it is concluded that these four phytochemicals, after passing through in vitro and in vivo validation, can be utilized as potential DPP4 inhibitors as they have strong properties as compared to those of various experimentally validated inhibitors.

Abstract Read Full Article HTML DOI: 10.29328/journal.ijcmbt.1001008 Cite this Article

2020-02-27 Research Article

Production and evaluation of enzyme-modified lighvan cheese using different levels of commercial enzymes

Abstract

Enzyme-modified cheeses are concentrated cheese flavors produced enzymatically from dairy substrates in order to provide an intense source of cheese flavor with broad applications. Lighvan cheese is an Iranian traditional cheese with a pleasant taste and flavor generated after ripening. Therefore, the objective of the present study was to use commercial enzymes to produce enzyme-modified Lighvan cheese made from unripened and immature cheese. In this study, Neutrase (0.05%, 0.15%, and 0.2%) and Flavourzyme (0.05%, 0.1%, and 0.2%) were added to the base mixture. The resulting mixture was stored in an incubator for 24, 72, and 96 h to provide intense cheese flavor. Sensory evaluations of all samples in terms of bitterness, flavor, taste, and general acceptance were also carried out.

The results of the sensory evaluations revealed no significant difference between most of the samples in terms of bitterness, flavor, taste, and general acceptance with respect to the incubation duration and the type and level of the commercial enzymes (p ≤ 0.05). However, the effect of the different concentrations of Flavourzyme on the cheese texture was significant after 24, 72, and 96 h of incubation (p ≤ 0.05). In addition, the effects of the different concentrations of Neutrase on the cheese texture were significant after 96 h of incubation (p ≤ 0.05). Finally, the effect of different concentrations of Flavourzyme on the general acceptance of the samples was significant following 24, 72, and 96 h of incubation (p ≤ 0.05). In general, considering the flavor, taste, texture and general acceptance scores of the enzyme-modified Lighvan cheese samples, the best sample was the sample produced by using 0.1% Neutrase and 0.1% Flavourzyme mixture.

Abstract Read Full Article HTML DOI: 10.29328/journal.ijcmbt.1001009 Cite this Article

2020-04-30 Research Article

Development of ELISA based detection system against C. botulinum type B

Abstract

Botulism is the disease caused by botulinum neurotoxins. It is produced by an obligate anaerobic bacteria called Clostridium botulinum. There is no immuno-detection system available in the world for the detection of C. botulinum. Secretory proteins of cooked meat media grown C. botulinum type B were extracted by TCA precipitation method. Polyclonal antibodies were generated against secretory proteins. Cytokine profiling of secretory proteins were done. An immunodetection system was developed to detect the C. botulinum type B using Secretory proteins of C. botulinum type B.

Abstract Read Full Article HTML DOI: 10.29328/journal.ijcmbt.1001010 Cite this Article

2020-05-11 Research Article

Physicochemical and microbiological quality of tanker waters in Bengaluru urban for safe water supply

Abstract

This study investigated the water quality of tanker waters that was collected from Bengaluru urban areas to assess its suitability for domestic purpose. A total of 50 samples were collected in dry (March 2019) season. All samples were analyzed for various hydrochemical parameters, such as pH, total dissolved solids (TDS), electrical conductivity (EC), turbidity, dissolved oxygen (DO), total hardness (as CaCO3), calcium (Ca2+), chloride (Cl−) and nitrate (NO3−). Bacteriological analyses of water samples were analyzed for total coliform count. A very high level of total hardness (186 - 434.6 mg L-1) was determined in 27 water samples tested in this study indicating the necessity of water treatment before used for domestic purpose. Of the 50 samples tested, 7 showed a most probable number (MPN) index of < 23 and 9 showed < 240 and the remaining 34 were unsatisfactory with an MPN index of > 1600 per 100 ml. In some locations, the presence of high MPN index, in particular, rings the bell before using the tanker water in houses and restaurants. Exploration of the mechanisms by which water quality deteriorates during supply chain and potential implication for regulatory policy for monitoring of tanker water while distribution is the need of the hour.

Abstract Read Full Article HTML DOI: 10.29328/journal.ijcmbt.1001011 Cite this Article

2020-05-11 Mini Review

Role of T-Helper cells (CD4+ T Cells) in human immune system against some microbial infection: A mini review

Abstract

The human immune system consists of innate and adaptive immune responses which both provide protective immunity to microbial infection. The adaptive immune system consists of T and B cell which act as second line defense through production of neutralizing antibody by B cells and cytotoxic activity of CD8+ T cells.  The CD4+ T-cell performs a central role in the immune responses. These cells also known as T4 or helper/inducer T lymphocytes recognize antigens presented by antigen presenting cells (APC) such as macrophages and monocytes. Once antigens such as bacteria and viruses are presented, CD4+ T lymphocytes orchestrate the body’s antigen-specific immune response by Coordinating B-lymphocyte production of antibodies to these antigens, producing cytokines and induction of cytotoxic T-lymphocytes. The paper was aimed to review the role of T-helper cells (CD4+ T cells) in human immune system against some microbial infections.

Abstract Read Full Article HTML DOI: 10.29328/journal.ijcmbt.1001012 Cite this Article