饮食诱发肥胖小鼠模型的性别差异:肠道微生物组的作用

IF 4.9 2区 医学 Q1 ENDOCRINOLOGY & METABOLISM Biology of Sex Differences Pub Date : 2024-01-10 DOI:10.1186/s13293-023-00580-1
Saluda Stapleton, Grace Welch, Lindsay DiBerardo, Linnea R Freeman
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引用次数: 0

摘要

近几十年来,全球肥胖症发病率呈指数级增长,在 40 年间几乎翻了一番。我们需要全面了解肥胖症的系统性影响,以便开发新的预防和治疗药物,有效对抗当前肥胖症的流行。以前利用小鼠模型进行的饮食诱发肥胖症研究表明,体重增加因性别而异。在这些研究中,雌性小鼠在摄入相同的高脂肪(HF)饮食时,体重增加明显少于雄性小鼠,这表明雌性小鼠对饮食诱发的肥胖具有抵抗力。研究还显示,雄性和雌性肠道微生物组的组成存在性别差异,这在一定程度上是性激素的结果。了解性别之间的代谢差异有助于开发预防和治疗肥胖症的新措施。本研究旨在描述体重增加、血浆脂质概况、粪便微生物群组成和粪便短链脂肪酸水平的性别差异。我们假设肠道微生物群在这些性别差异中的作用,而这些差异会在微生物群耗竭后恢复正常。我们使用小鼠模型来研究这些影响。小鼠按性别、饮食和是否使用抗生素鸡尾酒来消耗肠道微生物群中的菌属被分为不同的处理组。我们假设在体重增加和肥胖的系统测量(包括激素和循环游离脂肪酸水平)方面都会出现性别差异。我们确定,在结果测量方面,性别和/或治疗方法的差异具有统计学意义。我们证实了之前的研究结果,即雄性小鼠的体重增加明显多于以相同高脂肪饮食喂养的雌性小鼠。然而,在使用抗生素消耗微生物组后,性别差异依然存在。我们的结论是,肠道微生物组的性别差异可能会导致肥胖的性别差异,但并不能解释所有的差异。
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Sex differences in a mouse model of diet-induced obesity: the role of the gut microbiome
Recent decades have seen an exponential rise in global obesity prevalence, with rates nearly doubling in a span of 40 years. A comprehensive knowledge base regarding the systemic effects of obesity is required to create new preventative and therapeutic agents effective at combating the current obesity epidemic. Previous studies of diet-induced obesity utilizing mouse models have demonstrated a difference in bodyweight gain by sex. In such studies, female mice gained significantly less weight than male mice when given the same high fat (HF) diet, indicating a resistance to diet-induced obesity. Research has also shown sex differences in gut microbiome composition between males and females, indicated to be in part a result of sex hormones. Understanding metabolic differences between sexes could assist in the development of new measures for obesity prevention and treatment. This study aimed to characterize sex differences in weight gain, plasma lipid profiles, fecal microbiota composition, and fecal short chain fatty acid levels. We hypothesized a role for the gut microbiome in these sex differences that would be normalized following microbiome depletion. A mouse model was used to study these effects. Mice were divided into treatment groups by sex, diet, and presence/absence of an antibiotic cocktail to deplete genera in the gut microbiome. We hypothesized that sex differences would be present both in bodyweight gain and systemic measures of obesity, including hormone and circulating free fatty acid levels. We determined statistically significant differences for sex and/or treatment for the outcome measures. We confirm previous findings in which male mice gained significantly more weight than female mice fed the same high fat diet. However, sex differences persisted following antibiotic administration for microbiome depletion. We conclude that sex differences in the gut microbiome may contribute to sex differences in obesity, but they do not explain all of the differences.
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来源期刊
Biology of Sex Differences
Biology of Sex Differences ENDOCRINOLOGY & METABOLISM-GENETICS & HEREDITY
CiteScore
12.10
自引率
1.30%
发文量
69
审稿时长
14 weeks
期刊介绍: Biology of Sex Differences is a unique scientific journal focusing on sex differences in physiology, behavior, and disease from molecular to phenotypic levels, incorporating both basic and clinical research. The journal aims to enhance understanding of basic principles and facilitate the development of therapeutic and diagnostic tools specific to sex differences. As an open-access journal, it is the official publication of the Organization for the Study of Sex Differences and co-published by the Society for Women's Health Research. Topical areas include, but are not limited to sex differences in: genomics; the microbiome; epigenetics; molecular and cell biology; tissue biology; physiology; interaction of tissue systems, in any system including adipose, behavioral, cardiovascular, immune, muscular, neural, renal, and skeletal; clinical studies bearing on sex differences in disease or response to therapy.
期刊最新文献
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