Identification of high caspase-3 mRNA expression as a unique signature profile for extremely old individuals

Chantale Lacelle, Suying Xu, Eugenia Wang

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Apoptosis, or programmed cell death, is important for maintaining tissue homeostasis, as it permits the elimination of damaged, functionless or unwanted cells. As we age, our immune system undergoes constant remodeling, during which age-associated changes in immune parameters, including decreased naïve and increased memory T cells, have been reported. However, excessive immune cell loss, rendering the elderly more vulnerable to infections, and inappropriate deletion of damaged or functionless lymphocytes, can contribute to the development of age-associated diseases. As such, we studied the mRNA expression of cell death (specifically caspase) genes in nonagenarians and centenarians, successful models of ageing who have survived or avoided age-associated diseases, as well as in their younger counterparts and found that population composed of extremely old individuals shows a unique pattern of caspase mRNA expression, characterized by high levels of caspase-1 and -3, and low levels of caspase-8, mRNA while those composed of old individuals are characterize by high level of caspase-8 mRNA expression. Furthermore, we show that the described changes in caspases mRNA do not appear to results from age-related changes in PBMC composition, such as decreases in CD24. Therefore, we suggest that unique patterns of caspase mRNA results from the regulation of message abundance on a per cell basis, via a putative regulation of caspase genes at the transcription or RNA processing level, rather than changes in immune profiles.

Original languageEnglish (US)
Pages (from-to)1133-1144
Number of pages12
JournalMechanisms of Ageing and Development
Volume123
Issue number8
DOIs
StatePublished - Apr 30 2002

Fingerprint

Caspase 3
Caspases
Messenger RNA
Caspase 8
Cell death
Tissue homeostasis
Cell Death
Genes
Caspase 1
T-cells
Lymphocytes
Immune system
Transcription
Immune System
Homeostasis
Aging of materials
RNA
Apoptosis
T-Lymphocytes
Data storage equipment

Keywords

  • Ageing
  • Apoptosis
  • Caspases
  • Longevity
  • MRNA

ASJC Scopus subject areas

  • Aging
  • Biochemistry
  • Developmental Biology
  • Developmental Neuroscience

Cite this

Identification of high caspase-3 mRNA expression as a unique signature profile for extremely old individuals. / Lacelle, Chantale; Xu, Suying; Wang, Eugenia.

In: Mechanisms of Ageing and Development, Vol. 123, No. 8, 30.04.2002, p. 1133-1144.

Research output: Contribution to journalArticle

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