Omega-3 polyunsaturated fatty acids ameliorate high-fat-diet-induced structural and functional impairments of testicular tissue via ER stress inhibition.

IF 2 3区 生物学 Q2 BIOCHEMICAL RESEARCH METHODS
Jiaxi Ju, Shuangli Wen, Xuan Zhao, Jiyuan Cheng, Hongjin Yang, Guiming Zhu
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引用次数: 0

Abstract

Obesity is a well-established risk factor for male infertility. Recent studies have demonstrated that endoplasmic reticulum (ER) stress is a key contributor to spermatogenic disorder associated with obesity. Omega-3 polyunsaturated fatty acids (n-3 PUFAs) have been shown to mitigate ER stress, thereby alleviating insulin resistance. However, their specific role in obesity-induced reproductive disorders remains unclear. In this study, we used the transgenic fat-1 mice (TG mice) that are capable of endogenously converting Omega-6 polyunsaturated fatty acids (n-6 PUFAs) to n-3 PUFAs. The mice were divided into four groups according to their diet: a control group (WT + ND, n = 8), a wild type high-fat diet group (WT + HFD, n = 8), a transgenic control group (TG + ND, n = 8), and a transgenic high-fat diet group (TG + HFD, n = 8). After 18 weeks of feeding, the mice were anesthetized and euthanized to examine indicators related to obesity and reproductive function. High-fat diet (HFD) induced significant obesity in WT mice, and we observed significant alteration mitophagy in the reproductive function of WT mice (P < 0.001), primarily manifested as abnormal testicular morphology, decreased sperm quantity and motility (P < 0.01), and reduced testosterone levels (P < 0.01). TG mice exhibited a significant attenuation of these pathological changes (P < 0.05). Markers of ER stress and mitophagy were significantly reduced in the testes of TG mice (P < 0.01), accompanied by an increased expression of phosphorylated AMP-activated protein kinase (AMPK) (P < 0.01), compared to WT mice. Concurrently, TG mice exhibited significantly elevated levels of mitochondrial biogenesis markers and key enzymes involved in testosterone synthesis in the testes, compared to those in WT mice (P < 0.01). Furthermore, TG mice displayed notable resistance to testicular inflammation induced by HFD compared with WT mice (P < 0.01). Our findings suggest that HFD-induced obesity is associated with impaired testicular morphology and function in mice. n-3 PUFAs may ameliorate these impairments by activating AMPK to suppress ER stress, restore mitochondrial dysfunction, and alleviate inflammation, thereby improving testicular morphology and function.

Omega-3多不饱和脂肪酸通过内质网应激抑制改善高脂肪饮食引起的睾丸组织结构和功能损伤。
肥胖是男性不育的一个公认的危险因素。最近的研究表明,内质网(ER)应激是肥胖相关生精障碍的关键因素。Omega-3多不饱和脂肪酸(n-3 PUFAs)已被证明可以减轻内质网应激,从而减轻胰岛素抵抗。然而,它们在肥胖引起的生殖障碍中的具体作用尚不清楚。在这项研究中,我们使用了能够内源性将ω -6多不饱和脂肪酸(n-6 PUFAs)转化为n-3 PUFAs的转基因脂肪-1小鼠(TG小鼠)。将小鼠按饮食分为4组:对照组(WT + ND, n = 8)、野生型高脂饮食组(WT + HFD, n = 8)、转基因对照组(TG + ND, n = 8)、转基因高脂饮食组(TG + HFD, n = 8)。喂养18周后,对小鼠进行麻醉和安乐死,以检查肥胖和生殖功能相关指标。高脂饮食(HFD)诱导WT小鼠显著肥胖,我们观察到WT小鼠生殖功能有丝分裂的显著改变(P
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来源期刊
Transgenic Research
Transgenic Research 生物-生化研究方法
CiteScore
5.40
自引率
0.00%
发文量
38
审稿时长
4-8 weeks
期刊介绍: Transgenic Research focusses on transgenic and genome edited higher organisms. Manuscripts emphasizing biotechnological applications are strongly encouraged. Intellectual property, ethical issues, societal impact and regulatory aspects also fall within the scope of the journal. Transgenic Research aims to bridge the gap between fundamental and applied science in molecular biology and biotechnology for the plant and animal academic and associated industry communities. Transgenic Research publishes -Original Papers -Reviews: Should critically summarize the current state-of-the-art of the subject in a dispassionate way. Authors are requested to contact a Board Member before submission. Reviews should not be descriptive; rather they should present the most up-to-date information on the subject in a dispassionate and critical way. Perspective Reviews which can address new or controversial aspects are encouraged. -Brief Communications: Should report significant developments in methodology and experimental transgenic higher organisms
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