浙江农业学报 ›› 2024, Vol. 36 ›› Issue (1): 58-66.DOI: 10.3969/j.issn.1004-1524.20230230

• 动物科学 • 上一篇    下一篇

高温胁迫对小黄鱼肝脏组织结构和细胞凋亡的影响

何雨1(), 刘峰2,*(), 张天乐3, 楼宝2, 魏福亮2, 叶挺2   

  1. 1.湖州师范学院 生命科学学院,浙江 湖州 313002
    2.浙江省农业科学院 水生生物研究所,农产品质量安全危害因子与风险防控国家重点实验室,浙江 杭州 310021
    3.中国计量大学 生命科学学院,浙江 杭州 310018
  • 收稿日期:2023-02-25 出版日期:2024-01-25 发布日期:2024-02-18
  • 作者简介:何雨(1996—),女,四川内江人,硕士研究生,从事鱼类遗传育种研究。E-mail: 2412069997@qq.com
  • 通讯作者: * 刘峰,E-mail: lengfeng0210@126.com
  • 基金资助:
    国家自然科学基金(32102765);浙江省重点研发计划(2021C02055)

Histological study on the effect of high temperature stress on liver tissue in Larimichthys polyactis

HE Yu1(), LIU Feng2,*(), ZHANG Tianle3, LOU Bao2, WEI Fuliang2, YE Ting2   

  1. 1. College of Life Sciences, Huzhou Normal University, Huzhou 313002, Zhejiang, China
    2. State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
    3. College of Life Sciences, China Jiliang University, Hangzhou 310018, China
  • Received:2023-02-25 Online:2024-01-25 Published:2024-02-18

摘要:

为探究高温胁迫对小黄鱼(Larimichthys polyactis)肝脏组织结构和细胞凋亡的影响,研究通过人工控温,按照2 ℃·h-1的升温速率将水温从自然水温15 ℃升高至31 ℃(实验组)并维持此温度至96 h,同时设置15 ℃的常温对照组。分别于处理组水温达到31 ℃后的0、6、12、24、48、72、96 h时,同时采集处理组和对照组肝脏组织,进行组织切片观察肝脏组织的组织学变化,采用脱氧核糖核苷酸末端转移酶介导的缺口末端标记(TUNEL)法检测肝脏组织细胞凋亡情况。结果显示,31 ℃处理0 h时肝脏组织显微结构和超微结构与对照组相类似,无显著变化。但是,随着高温处理时间的延长,肝脏组织损伤逐渐加重,96 h后肝脏呈现严重损伤,表现为水肿、细胞核消失甚至溶解和肝组织局部坏死,以及肝细胞原有结构破坏等现象。此外,随着高温胁迫的持续,肝脏细胞凋亡现象逐渐加重。结果表明,高温胁迫对小黄鱼的肝脏组织造成一定程度的损害,并诱导大量细胞凋亡。研究结果明确了高温胁迫对小黄鱼肝脏组织的影响作用,对于小黄鱼养殖管理避免肝脏疾病发生具有重要的指导意义。

关键词: 小黄鱼, 高温胁迫, 肝脏, 组织结构, 细胞凋亡

Abstract:

In order to explore the effect of high temperature stress on the liver tissue structure and apoptosis of Larimichthys polyactis, the rearing temperature was raised from 15 ℃ to 31 ℃ by altering the water temperature in the tank at a constant rate of 2 ℃·h-1, and maintained to 96 h, recorded as the test group. At the same time, a control group rearing under the temperature of 15 ℃ was set. At the 0, 6, 12, 24, 48, 72, 96 h after the rearing temperature of the test group reached 31 ℃, the liver tissue of the test and control group were collected to investigate the histological changes and apoptosis of the liver tissues through the methods of tissue sections and terminal-deoxynucleotidyl transferase mediated dUTP nick end labeling (TUNEL), respectively. The results showed that the liver morphology of microstructure and ultrastructure were similar to those of the control group after 0 h treatment at 31 ℃, and there was no significant change. However, with the extension of high temperature treatment time, liver tissue damage gradually worsened. After 96 h of treatment, the liver showed serious damage, including edema, disappearance or even dissolution of nuclei, local necrosis of liver tissue, and destruction of the original structure of liver cells. In addition, with the continuation of high temperature stress, the phenomenon of liver cell apoptosis gradually aggravated. The results showed that high temperature stress caused a certain degree of damage to the liver tissue of L. polyactis and induced a large number of liver cell apoptosis. The results of the present study clarified the effect of high temperature stress on the liver tissue of L. polyactis, which is of great significance for the rearing management of L. polyactis to avoid the occurrence of liver disease.

Key words: Larimichthys polyactis, high-temperature stress, liver, organization structure, apoptosis

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