Fruit peel polyphenols demonstrate substantial anti‑tumour effects in the model of breast cancer

forrás: http://medpublics.com/docs/Fruit_peel_polyphenols.pdf


2021-06-09 11:43:06


Abstract Purpose Fruit and vegetable intake is inversely correlated with cancer; thus, it is proposed that an extract of phytochemicals as present in whole fruits, vegetables, or grains may have anti-carcinogenic properties. Thus, the anti-tumour effects of fruit peel polyphenols (Flavin7) in the chemoprevention of N-methyl-N-nitrosourea-induced mammary carcinogenesis in female rats were evaluated. Methods Lyophilized substance of Flavin7 (F7) was administered at two concentrations of 0.3 and 3 % through diet. The experiment was terminated 14 weeks after carcinogen administration, and mammary tumours were removed and prepared for histopathological and immunohistochemical analysis. In addition, using an in vitro cytotoxicity assay, apoptosis and proliferation after F7 treatment in human breast adenocarcinoma (MCF-7) cells were performed. Results High-dose F7 suppressed tumour frequency by 58 % (P < 0.001), tumour incidence by 24 % (P < 0.05), and lengthened latency by 8 days (P > 0.05) in comparison with the control rats, whereas lower dose of F7 was less effective. Histopathological analysis of tumours showed significant decrease in the ratio of high-/low-grade carcinomas after high-dose F7 treatment. Immunohistochemical analysis of rat carcinoma cells in vivo found a significant increase in caspase-3 expression and significant decrease in Bcl-2, Ki67, and VEGFR-2 expression in the highdose group. Both doses demonstrated significant positive effects on plasma lipid metabolism in rats. F7 significantly decreased survival of MCF-7 cells in vitro in MTT assay by dose- and time-dependent manner compared to control. F7 prevented cell cycle progression by significant enrichment in G1 cell populations. Incubation with F7 showed


Flavonoids in Cancer and Apoptosis

forrás: http://medpublics.com/docs/FLAVONOIDS_IN_CANCER.pdf


2021-04-06 11:11:41


Cancer is the second leading cause of death globally. Although, there are many different approaches to cancer treatment, they are often painful due to adverse side effects and are sometimes ineffective due to increasing resistance to classical anti-cancer drugs or radiation therapy. Targeting delayed/inhibited apoptosis is a major approach in cancer treatment and a highly active area of research. Plant derived natural compounds are of major interest due to their high bioavailability, safety, minimal side effects and, most importantly, cost effectiveness. Flavonoids have gained importance as anti-cancer agents and have shown great potential as cytotoxic anti-cancer agents promoting apoptosis in cancer cells. In this review, a summary of flavonoids and their effectiveness in cancer treatment targeting apoptosis has been discussed.


Mechanisms underlying the antihypertensive effects of garlic bioactives.

forrás: http://www.ncbi.nlm.nih.gov/pubmed/24461311


2015-02-17 14:32:03


Cardiovascular disease remains the leading cause of death worldwide with hypertension being a major contributing factor to cardiovascular disease-associated mortality. On a population level, non-pharmacological approaches, such as alternative/complementary medicine, including phytochemicals, have the potential to ameliorate cardiovascular risk factors, including high blood pressure. Several epidemiological studies suggest an antihypertensive effect of garlic (Allium sativum) and of many its bioactive components. The aim of this review is to present an in-depth discussion regarding the molecular, biochemical and cellular rationale underlying the antihypertensive properties of garlic and its bioactive constituents with a primary focus on S-allyl cysteine and allicin. Key studies, largely from PubMed, were selected and screened to develop a comprehensive understanding of the specific role of garlic and its bioactive constituents in the management of hypertension. We also reviewed recent advances focusing on the role of garlic bioactives, S-allyl cysteine and allicin, in modulating various parameters implicated in the pathogenesis of hypertension. These parameters include oxidative stress, nitric oxide bioavailability, hydrogen sulfide production, angiotensin converting enzyme activity, expression of nuclear factor-κB and the proliferation of vascular smooth muscle cells. This review suggests that garlic and garlic derived bioactives have significant medicinal properties with the potential for ameliorating hypertension and associated morbidity; however, further clinical and epidemiological studies are required to determine completely the specific physiological and biochemical mechanisms involved in disease prevention and management.

Copyright © 2014 Elsevier Inc. All rights reserved.


Flavonoidok a rákban és az apoptózisban

forrás: http://medpublics.com/docs/FLAVONOIDS_IN_CANCER.pdf


2021-04-06 11:11:41


Világszerte a rák a második vezető halálok. Bár a rák kezelésére sok különböző megközelítés létezik, ezek gyakran fájdalmasak a káros mellékhatások, és néha hatástalanok a hagyományos rákellenes gyógyszerekkel vagy sugárterápiával szembeni növekvő rezisztencia miatt. A késleltetett/gátolt apoptózis célbavétele a rákkezelés egyik fő célja és a kutatás erősen aktív területe. A növényi eredetű természetes vegyületek jelentős érdeklődésre tartanak számot magas biológiai hasznosulásuk, biztonságosságuk, minimális mellékhatásaik, és ami a legfontosabb, költséghatékonyságuk miatt. A flavonoidok fontossá váltak rákellenes ágensekként és jelentős potenciált mutattak, mint olyan citotoxikus rákellenes ágensek, amelyek elősegítik az apoptózist a rákos sejtekben. Ebben az áttekintésben a flavonoidok, valamint a rák kezelésében az apoptózist célba vevő hatásosságuk összefoglalása kerül megvitatásra.


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