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      Hypoglycemic and hypolipidemic effects of different parts and formulations of bitter gourd ( Momordica Charantia)

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          Abstract

          Background

          Cardiovascular diseases and diabetes are responsible for large number of deaths throughout the globe. Bitter gourd has the potential to become a component of the diet or a dietary supplement for diabetic and pre-diabetic patients owing to the presence of insulin like molecules. Recent investigations have suggested that bitter gourd extracts may ameliorate high fat diet induced obesity and hyperlipidemia in animal models. Moreover, its supplements in food result in lowering weight gain and visceral fat mass.

          Methods

          The current study was designed to investigate the nutraceutical potential of skin, flesh and whole fruit of bitter gourd cultivars against hyperglycemia and hyperlipidemia. For the purpose, various bitter gourd cultivars were procured from local market. Bio-evaluation studies were carried out on biochemical parameters using rodent experiment model.

          Results

          From results, it was revealed that maximum reduction in blood glucose skin 1.06%, flesh 2.65%, whole fruit 4.29%, total cholesterol skin 6.60%, flesh 6.04%, whole fruit 6.70%, low density lipoprotein skin 5.55%, flesh 6.81%, whole fruit 6.60%, and triglycerides skin 0.04%, flesh 3.38%, whole fruit 2.02%, were observed. Moreover, insulin skin 2.14%, flesh 3.52%, whole fruit 2.73%, production was slightly enhanced with improved levels of high density lipoprotein in whole fruit of bitter gourd.

          Conclusion

          Overwhelmingly, it may be inferred here that bitter gourd holds the potential to significantly improve diabetic conditions and associated late complications with no ill effects on body organs.

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          Most cited references42

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          Quantitative insulin sensitivity check index: a simple, accurate method for assessing insulin sensitivity in humans.

          Insulin resistance plays an important role in the pathophysiology of diabetes and is associated with obesity and other cardiovascular risk factors. The "gold standard" glucose clamp and minimal model analysis are two established methods for determining insulin sensitivity in vivo, but neither is easily implemented in large studies. Thus, it is of interest to develop a simple, accurate method for assessing insulin sensitivity that is useful for clinical investigations. We performed both hyperinsulinemic isoglycemic glucose clamp and insulin-modified frequently sampled iv glucose tolerance tests on 28 nonobese, 13 obese, and 15 type 2 diabetic subjects. We obtained correlations between indexes of insulin sensitivity from glucose clamp studies (SI(Clamp)) and minimal model analysis (SI(MM)) that were comparable to previous reports (r = 0.57). We performed a sensitivity analysis on our data and discovered that physiological steady state values [i.e. fasting insulin (I(0)) and glucose (G(0))] contain critical information about insulin sensitivity. We defined a quantitative insulin sensitivity check index (QUICKI = 1/[log(I(0)) + log(G(0))]) that has substantially better correlation with SI(Clamp) (r = 0.78) than the correlation we observed between SI(MM) and SI(Clamp). Moreover, we observed a comparable overall correlation between QUICKI and SI(Clamp) in a totally independent group of 21 obese and 14 nonobese subjects from another institution. We conclude that QUICKI is an index of insulin sensitivity obtained from a fasting blood sample that may be useful for clinical research.
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            Phenolic contents and antioxidant activities of bitter gourd (Momordica charantia L.) leaf, stem and fruit fraction extracts in vitro.

            Bitter gourd (Momordica charantia L.) has long been regarded as a food and medicinal plant. We investigated the antioxidant activity of the water extract of leaf, stem and fruit fractions by several in vitro systems of assay, namely DPPH radical-scavenging activity, hydroxyl radical-scavenging activity, β-carotene-linoleate bleaching assay, ferric reducing/antioxidant power (FRAP) assay and total antioxidant capacity. Total phenolic content was measured by Folin-Ciocalteu reagent. Identification of phenolic compounds was achieved using HPLC with the UV-diode array detection. The extracts of different fractions were found to have different levels of antioxidant activity in the systems tested. The leaf extract showed the highest value of antioxidant activity, based on DPPH radical-scavenging activity and ferric reducing power, while the green fruit extract showed the highest value of antioxidant activity, based on hydroxyl radical-scavenging activity, β-carotene-linoleate bleaching assay and total antioxidant capacity. The predominant phenolic compounds were gallic acid, followed by caffeic acid and catechin. The present study demonstrated that the water extract fractions of bitter gourd have different responses with different antioxidant methods. Total phenol content was shown to provide the highest association with FRAP assay in this present study (R(2)=0.948).
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              Bitter melon (Momordica charantia): a review of efficacy and safety.

              The pharmacology, clinical efficacy, adverse effects, drug interactions, and place in therapy of bitter melon are described. Bitter melon (Momordica charantia) is an alternative therapy that has primarily been used for lowering blood glucose levels in patients with diabetes mellitus. Components of bitter melon extract appear to have structural similarities to animal insulin. Antiviral and antineoplastic activities have also been reported in vitro. Four clinical trials found bitter melon juice, fruit, and dried powder to have a moderate hypoglycemic effect. These studies were small and were not randomized or double-blind, however. Reported adverse effects of bitter melon include hypoglycemic coma and convulsions in children, reduced fertility in mice, a favism-like syndrome, increases in gamma-glutamyltransferase and alkaline phosphatase levels in animals, and headaches. Bitter melon may have additive effects when taken with other glucose-lowering agents. Adequately powered, randomized, placebo-controlled trials are needed to properly assess safety and efficacy before bitter melon can be routinely recommended. Bitter melon may have hypoglycemic effects, but data are not sufficient to recommend its use in the absence of careful supervision and monitoring.
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                Author and article information

                Contributors
                mahwishft@yahoo.com
                f.saeed@gcuf.edu.pk
                +92-333-8802239 , sajid_ft@yahoo.com , msajidarshad@gcuf.edu.pk
                linknisa@gmail.com
                tahir_nadeemm@yahoo.com
                umairfood1@gmail.com
                Journal
                Lipids Health Dis
                Lipids Health Dis
                Lipids in Health and Disease
                BioMed Central (London )
                1476-511X
                10 November 2017
                10 November 2017
                2017
                : 16
                : 211
                Affiliations
                ISNI 0000 0004 0637 891X, GRID grid.411786.d, Institute of Home & Food Sciences, , Government College University, ; Faisalabad, 38040 Pakistan
                Article
                602
                10.1186/s12944-017-0602-7
                5681810
                29126447
                16e3aaef-4225-4ca1-a438-7fafa9c1fd2b
                © The Author(s). 2017

                Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License ( http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver ( http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

                History
                : 15 August 2017
                : 30 October 2017
                Categories
                Research
                Custom metadata
                © The Author(s) 2017

                Biochemistry
                functional foods,bitter gourd,nutraceutical,hyperglycemia,hyperlipidemia
                Biochemistry
                functional foods, bitter gourd, nutraceutical, hyperglycemia, hyperlipidemia

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