CD4+ T cells and immunosenescence--a mini-review.
نویسندگان
چکیده
Age-related declines in immune function are associated with reduced humoral responses following vaccination or infection. Central to this defect is a decline in naïve CD4+ T cell function. In this review, we discuss factors intrinsic and extrinsic to the CD4+ T cell compartment that affect host immunity and propose means by which deficient CD4+ T cell function can be fully restored in the aged.
منابع مشابه
C/EBPα Is Dispensable for the Ontogeny of PD-1+ CD4+ Memory T Cells but Restricts Their Expansion in an Age-Dependent Manner
Ageing and cancer is often associated with altered T cell distributions and this phenomenon has been suggested to be the main driver in the development of immunosenescence. Memory phenotype PD-1+ CD4+ T cells accumulate with age and during leukemic development, and they might account for the attenuated T cell response in elderly or diseased individuals. The transcription factor C/EBPα has been ...
متن کاملPremature immunosenescence in HIV-infected patients on highly active antiretroviral therapy with low-level CD4 T cell repopulation.
OBJECTIVES To analyse the role of thymic function and its association with cellular immunosenescence markers in patients with low-level CD4 T cell repopulation, despite complete HIV RNA replication control on highly active antiretroviral therapy (HAART). METHODS Cellular immunosenescence markers comparing patients with CD4 T cell counts or=48 weeks (n = 11) and patien...
متن کاملA Historic Review of the Role of CD4+ T-Cell Subsets in Development of the Immune Responses against Cutaneous and Visceral Leishmaniases
The heterogeneity of CD4+ T cells has been investigated since the late 1970s, when their Th1 and Th2 subsets were coined. Later studies on the cutaneous form of the Leishmaniasis were focused on the experimental models of Leishmania major infection using the susceptible BALB/c and the resistant C57BL/6 mice. At the early 21st century, the regulatory T-cells subpopulation was introduced and its ...
متن کاملThe role of T helper 9(Th9) against Infectious Diseases
Background and aims: Infectious diseases are disorders caused by organisms such as bacteria, viruses, fungi or parasites .The Th9 subset develops in response to combined signals from TGF-b and IL-4 among a cacophony of other cytokines in an extracellular milieu. T helper 9 (Th9) cells, as a novel CD4 T cell subset, seem to play a complex role in the outcome of specific immune responses. In thi...
متن کاملThe Menin–Bach2 axis is critical for regulating CD4 T-cell senescence and cytokine homeostasis
Although CD4 T-cell senescence plays an important role in immunosenescence, the mechanism behind this process remains unclear. Here we show that T cell-specific Menin deficiency results in the premature senescence of CD4 T cells, which is accompanied by the senescence-associated secretory phenotype after antigenic stimulation and dysregulated cytokine production. Menin is required for the expan...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Gerontology
دوره 55 5 شماره
صفحات -
تاریخ انتشار 2009