Involvement of growth factors in thymic involution

被引:25
|
作者
García-Suárez, O
Pérez-Pérez, M
Germanà, A
Esteban, I
Germanà, G
机构
[1] Univ Messina, Dipartimento Morfol Biochim Fisiol & Prod Anim, I-98168 Messina, Italy
[2] Univ Oviedo, Dept Morfol & Biol Celular, E-33006 Oviedo, Spain
[3] Univ Oviedo, Dept Cirugia & Especialidades Med Quirurg, E-33006 Oviedo, Spain
关键词
thymic epithelium; ageing; thymocytes; neurotrophins; cytokines;
D O I
10.1002/jemt.10413
中图分类号
R602 [外科病理学、解剖学]; R32 [人体形态学];
学科分类号
100101 ;
摘要
The thymus undergoes an age-dependent degenerative process which is mainly characterized by a progressive loss of lymphoid tissue. Thymic involution is particularly important in relation to immunosenescence and its various associated diseases; this fact has prompted many studies aimed at understanding the causes and mechanisms of thymic degeneration which may, ultimately, lead to the possibility of manipulating it. In this sense, one of the aspects which has deserved most attention is the thymic microenvironment, and more precisely, the many growth factors to which the cells present in the organ are exposed. Thus, the levels of several of such factors have been reported to undergo age-dependent changes in the thymus, which may point at an influence on the regression of the organ. In this article we consider which growth factors and growth factor receptors occur in the vertebrate thymus. Then, focusing on those whose influences are better documented, i.e., neurotrophins, cytokines and IGFs, we discuss their potential role in the organ and the possibility of their being involved in thymic involution. (C) 2003 Wiley-Liss, Inc.
引用
收藏
页码:514 / 523
页数:10
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