中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (31): 6681-6687.doi: 10.12307/2025.557

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

白细胞介素18在低氧暴露大鼠骨髓及外周血中表达的意义

李金杰,肖经雪,李  楠,宋  珍,周彦云,马  婕   

  1. 李金杰,肖经雪,李  楠,宋  珍,周彦云,马  婕

  • 收稿日期:2024-08-05 接受日期:2024-10-08 出版日期:2025-11-08 发布日期:2025-02-24
  • 通讯作者: 马婕,博士,副主任医师,青海大学附属医院(临床医学院),青海省西宁市 810001
  • 作者简介:李金杰,女,1997年生,河南省兰考县人,汉族,青海大学在读硕士,主要从事血液病学方面的研究。
  • 基金资助:
    青海省“昆仑英才·高端创新创业人才”计划(青才人字2020-18号),项目负责人:马婕;青海省科技厅自然科学基金项目(2020-ZJ-956Q),项目负责人:马婕

Significance of interleukin-18 expression in bone marrow and peripheral blood of rats exposed to hypoxia

Li Jinjie, Xiao Jingxue, Li Nan, Song Zhen, Zhou Yanyun, Ma Jie#br#

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  1. Li Jinjie, Xiao Jingxue, Li Nan, Song Zhen, Zhou Yanyun, Ma Jie
  • Received:2024-08-05 Accepted:2024-10-08 Online:2025-11-08 Published:2025-02-24
  • Contact: Ma Jie, MD, Associate chief physician, Qinghai University Affiliated Hospital (Clinical Medicine School), Xining 810001, Qinghai Province, China
  • About author:Li Jinjie, Master candidate, Qinghai University Affiliated Hospital (Clinical Medicine School), Xining 810001, Qinghai Province, China
  • Supported by:
    Qinghai Province “Kunlun Talents•High-end Innovation and Entrepreneurship Talents” Program, No. 2020-18 (to MJ); Qinghai Provincial Science and Technology Department Natural Science Foundation Project, No. 2020-ZJ-956Q (to MJ)

摘要:

文题释义:

骨髓有核红细胞:骨髓是充于骨髓腔和骨髓松质间隙的软组织,分为红骨髓和黄骨髓。红骨髓含有不同发育阶段的红细胞和其他幼稚型血细胞,呈红色,是人体造血组织,具有活跃的造血功能。有核红细胞存在于骨髓中,指未成熟的红细胞,仍然保留细胞核,包括原始红细胞、早幼红细胞、中幼红细胞和晚幼红细胞,可以增殖分化成红细胞,成熟红细胞没有细胞核。 
白细胞介素18:属于白细胞介素家族的一员,它是一种由单核细胞、巨噬细胞和中性粒细胞等多种细胞类型产生的蛋白质,是一种促炎细胞因子,在免疫应答和炎症调节中扮演重要角色。 

摘要
背景:低氧暴露下大鼠外周血红细胞水平明显升高,而骨髓有核红细胞增殖可能是导致外周血红细胞增加的直接原因之一,既往研究着重于促红细胞生成素、低氧诱导因子等因素的影响,对炎症、免疫等相关因素的研究甚少。 
目的:研究低氧暴露后大鼠骨髓有核红细胞、骨髓上清液及外周血中白细胞介素18的表达,探讨白细胞介素18在慢性高原病发病过程中可能发挥的作用。 
方法:16只健康雄性SD大鼠随机分为2组:实验组在模拟海拔5 000 m低压氧舱中饲养28 d,对照组在海拔2 260 m的实验室内饲养28 d,检测两组大鼠血常规,流式测定两组大鼠骨髓CD71+有核红细胞比例,RT-qPCR、Western blot测定两组大鼠骨髓CD71+有核红细胞中白细胞介素18 mRNA和蛋白表达,免疫荧光测定两组大鼠胸骨中白细胞介素18蛋白表达,ELISA测定两组大鼠外周血、骨髓上清液中白细胞介素18水平。 
结果与结论:①实验组大鼠外周血红细胞计数、血红蛋白、红细胞压积、平均血红蛋白含量等指标均较对照组增高(P < 0.05);②实验组大鼠骨髓CD71+有核红细胞比例较对照组显著增高(P < 0.05);③RT-qPCR结果显示,实验组大鼠骨髓CD71+有核红细胞中白细胞介素18 mRNA表达较对照组显著增高(P < 0.05);④Western blot结果显示,实验组大鼠骨髓CD71+有核红细胞中白细胞介素18蛋白表达较对照组显著增高(P < 0.05);⑤免疫荧光结果显示,实验组大鼠胸骨中白细胞介素18蛋白表达较对照组显著增高(P < 0.05);⑥ELISA结果显示,实验组大鼠血清中白细胞介素18水平较对照组增高(P < 0.05),但实验组大鼠骨髓上清液中白细胞介素18水平较对照组下降(P < 0.05)。结果表明低氧暴露后大鼠骨髓CD71+有核红细胞、外周血中白细胞介素18表达增高可能参与骨髓有核红细胞的增殖过程。

关键词: 白细胞介素18, 低氧, 骨髓, 有核红细胞, 血红蛋白, 外周血, 红细胞, 工程化细胞

Abstract: BACKGROUND: The level of peripheral erythrocytes in rats is significantly increased under hypoxia exposure, and the proliferation of nucleated erythrocytes in the bone marrow may be one of the direct causes of the increase in peripheral erythrocytes. Previous studies have focused on the effects of factors such as erythropoietin and hypoxia-inducible factor, but little research has been done on related factors such as inflammation and immunity.
OBJECTIVE: To study the expression of interleukin-18 in bone marrow nucleated erythrocytes, bone marrow supernatant and peripheral blood of rats after hypoxia exposure, and to explore the possible role of interleukin-18 in the pathogenesis of chronic mountain sickness. 
METHODS: Sixteen healthy male SD rats were randomly divided into two groups: the experimental group was kept in a hypobaric oxygen chamber at a simulated altitude of 5 000 m for 28 days, and the control group was kept in a laboratory at an altitude of 2 260 m for 28 days. The blood routine tests of the two groups of rats were performed. The proportion of CD71+ nucleated erythrocytes in the bone marrow of the two groups of rats was determined by flow cytometry. The expressions of interleukin 18 mRNA and protein in CD71+ nucleated erythrocytes in the bone marrow of the two groups of rats were determined by RT-qPCR and western blot assay. The expressions of interleukin 18 protein in the sternum of the two groups of rats were determined by immunofluorescence. The levels of interleukin 18 in the peripheral blood and bone marrow supernatant of the two groups of rats were determined by ELISA. 
RESULTS AND CONCLUSION: (1) The indexes of erythrocyte count, hemoglobin, hematocrit, and mean hemoglobin content in peripheral blood of the experimental group were higher than those of the control group (P < 0.05). (2) The proportion in bone marrow CD71+ erythroblasts was significantly higher in the experimental group than that in the control group (P < 0.05). (3) RT-qPCR results showed that the expression of interleukin 18 mRNA in CD71+ nucleated erythrocytes in the bone marrow of rats in the experimental group was significantly higher than that in the control group (P < 0.05). (4) Western blot assay results showed that the expression of interleukin 18 protein in CD71+ nucleated erythrocytes in the bone marrow of rats in the experimental group was significantly higher than that in the control group (P < 0.05). (5) The immunofluorescence results showed that the expression of interleukin 18 protein in the sternum of rats in the experimental group was significantly higher than that in the control group (P < 0.05). (6) ELISA results exhibited that the level of interleukin 18 in the serum of rats of the experimental group was higher than that in the control group (P < 0.05), but the level of interleukin 18 in the bone marrow supernatant of rats in the experimental group was lower than that in the control group (P < 0.05). The results indicate that the increased expression of interleukin 18 in bone marrow CD71+ erythroblasts and peripheral blood of rats under hypobaric hypoxia may be involved in the proliferation of erythroblasts in bone marrow.


Key words: interleukin-18, hypoxia, bone marrow, nucleated erythrocyte, hemoglobin, peripheral blood, erythrocyte, engineered cell

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