口服氨基葡萄糖对实验性Wistar大鼠高脂饮食胰岛素抵抗和胰腺组织损伤的改善作用。

IF 1.3 4区 农林科学 Q2 VETERINARY SCIENCES Comparative medicine Pub Date : 2021-06-01 Epub Date: 2021-06-03 DOI:10.30802/AALAS-CM-21-000009
Cornelio Barrientos, Angélica Pérez, Jorge Vázquez
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引用次数: 3

摘要

高脂饮食引起的高脂血症是肥胖和2型糖尿病患者诱导胰岛素抵抗(IR)和胰腺β细胞不良反应的危险因素。这种关系可能是由于己糖胺生物合成途径的激活。外源性葡萄糖胺(GlcN)可以增加该途径的最终产物(尿嘧啶-5'-二磷酸- n -乙酰氨基葡萄糖),它可以介导IR和蛋白质糖基化。本研究的目的是评价口服GlcN和HFD对4组雄性Wistar大鼠IR和胰腺组织损伤的影响:正常饮食对照组,HFD组(24%)。g/g猪油)、GlcN组(每天饮用水中500mg /kg-1盐酸氨基葡萄糖)和HFD加口服GlcN组。测量与IR相关的代谢变量包括甘油三酯(TG)、游离脂肪酸(FFAs)和丙二醛(MDA)。胰腺的组织病理学评估也进行了。结果显示,HFD组胰脏核固缩和空泡化增加,伴有脂肪浸润和朗格汉斯岛结构改变。血清和胰腺组织中TG、FFAs、MDA含量均高于对照组。GlcN组未发生IR,仅发生轻度核固缩,胰腺TG、FFAs和MDA含量无明显变化。然而,GlcN和HFD联合给药降低了IR,改善了血清和胰腺组织中TG、FFAs和MDA水平,并改善了胰腺组织病理学改变,与对照组相比无显著差异。这些结果表明,口服剂量为500 mg/kg-1的GlcN对IR和HFD引起的胰腺组织损伤具有保护作用。
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Ameliorative Effects of Oral Glucosamine on Insulin Resistance and Pancreatic Tissue Damage in Experimental Wistar rats on a High-fat Diet.

Hyperlipidemia due to a high-fat diet (HFD) is a risk factor for inducing insulin resistance (IR) and adverse effects on pancreatic β-cells in obesity and type 2 diabetes mellitus. This relationship may be due to activation of the hexosaminebiosynthesis pathway. Administration of exogenous glucosamine (GlcN) can increase the end product of this pathway (uridine-5'-diphosphate-N-acetyl-glucosamine), which can mediate IR and protein glycosylation. The objective of this study was to evaluate the effects of oral GlcN and HFD on IR and pancreatic histologic damage in a 22 wk study of 4 groups of male Wistar rats: control group with normal chow diet, HFD group (24%. g/g lard), GlcN group (500 mg/kg-1 per day of glucosamine hydrochloride in drinking water) and HFD plus oral GlcN. Metabolic variables related to IR that were measured included triglycerides (TG), free fatty acids (FFAs) and malondialdehyde (MDA). Histopathologic evaluation of the pancreas was also performed. The results showed IR in the HFD group, which had increased pancreatic nuclear pyknosis and vacuolization, with fatty infiltration and structural alteration of the islets of Langerhans. TG, FFAs and MDA were higher in serum and pancreatic tissue as compared with the control group. The GlcN group did not develop IR and had only mild nuclear pyknosis with no significant change in the pancreatic content of TG, FFAs and MDA. However, the combined administration of GlcN and HFD attenuated IR and improved TG, FFAs and MDA levels in serum and pancreatic tissue and the pancreatic histopathologic changes, with no significant differences as compared with the control group. These findings suggest that the oral GlcN at a dose of 500 mg/kg-1 is protective against IR and the pancreatic histologic damage caused by HFD.

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来源期刊
Comparative medicine
Comparative medicine 医学-动物学
CiteScore
1.90
自引率
0.00%
发文量
71
审稿时长
6-12 weeks
期刊介绍: Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.
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