Flavonoid genistein protects bone marrow sinusoidal blood vessels from damage by methotrexate therapy in rats.

Abstract:

:Cancer chemotherapy can cause significant damage to the bone marrow (BM) microvascular (sinusoidal) system. Investigations must now address whether and how BM sinusoidal endothelial cells (SECs) can be protected during chemotherapy. Herein we examined the potential protective effects of genistein, a soy-derived flavonoid, against BM sinusoidal damage caused by treatment with methotrexate (MTX). The groups of young adult rats were gavaged daily with genistein (20 mg/kg) or placebo. After 1 week, rats also received daily injections of MTX (0.75 mg/kg) or saline for 5 days and were killed after a further 4 days. Histological analyses showed that BM sinusoids were markedly dilated ( p < 0.001) in the MTX-alone group but were unaffected or less dilated in the genistein+MTX group. In control rats, genistein significantly enhanced expression of vascular endothelial growth factor (VEGF; p < 0.01), particularly in osteoblasts, and angiogenesis marker CD31 ( p < 0.001) in bone. In MTX-treated rats, genistein suppressed MTX-induced apoptosis of BM SECs ( p < 0.001 vs MTX alone group) and tended to increase expression of CD31 and VEGF ( p < 0.05). Our in vitro studies showed that genistein in certain concentrations protected cultured SECs from MTX cytotoxic effects. Genistein enhanced tube formation of cultured SECs, which is associated with its ability to induce expression of endothelial nitric oxide synthase and production of nitric oxide. These data suggest that genistein can protect BM sinusoids during MTX therapy, which is associated, at least partially, with its indirect effect of promoting VEGF expression in osteoblasts and its direct effect of enhancing nitric oxide production in SECs.

journal_name

J Cell Physiol

authors

Hassanshahi M,Su YW,Khabbazi S,Fan CM,Chen KM,Wang JF,Qian A,Howe PR,Yan DW,Zhou HD,Xian CJ

doi

10.1002/jcp.27785

subject

Has Abstract

pub_date

2019-07-01 00:00:00

pages

11276-11286

issue

7

eissn

0021-9541

issn

1097-4652

journal_volume

234

pub_type

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