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Clin Sci (Lond). 2017 Jul 7;131(15):1895-1904. doi: 10.1042/CS20171028. Print 2017 Aug 1.

Quantitation of circulating GDF-11 and β2-MG in aged patients with age-related impairment in cognitive function.

Author information

1
Department of Orthopedics, First Affiliated Hospital, Chinese PLA General Hospital, Beijing 100048, China.
2
Department of Clinical Lab of Nanlou, Chinese PLA General Hospital, Beijing 100853, China.
3
State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing 102206, China.
4
Institute of Geriatrics/Key Laboratory of Normal Aging and Geriatrics, Chinese PLA General Hospital, Beijing 100853, China.
5
Department of Clinical Lab of Nanlou, Chinese PLA General Hospital, Beijing 100853, China jiebai6907@sina.com.

Abstract

Growth differentiation factor 11 (GDF-11) has been implicated in reverse effects of ageing on the central nervous system of humans. β2-microglobulin (β2-MG) has been reported to negatively regulate cognition. However, there is a lot of controversy about the role of GDF-11 and β2-MG in ageing and cognitive regulation. To examine the involvement of GDF-11 and β2-MG in the ageing process and cognitive dysfunction, a total of 51 healthy subjects and 41 elderly patients with different degrees of age-related cognitive impairment participated in the study. We measured plasma GDF-11 and β2-MG levels using ELISA and immunoturbidimetry, respectively. The results were statistically analyzed to evaluate the associations between levels of GDF-11 and β2-MG, and ageing and cognitive impairments. Circulating GDF-11 levels did not decline with age or correlate with ageing in healthy Chinese males. We did not detect differences in circulating GDF-11 levels amongst the healthy advanced age and four cognitive impairment groups. β2-MG levels increased with age, but there was no significant difference between healthy elderly males and advanced age males. Increased levels of β2-MG were observed in the dementia group compared with the healthy advanced age group. Our results suggest that circulating GDF-11 may not exert a protective effect during the ageing process or on cognitive function, and β2-MG may play a role in ageing and cognitive impairment. However, it is possible that the relatively small sample size in the present study affected the quality of the statistical analysis, and future studies are needed to further validate our findings.

KEYWORDS:

ageing; cognitive impairment; growth differentiation factor 11; β2-microglobulin

PMID:
28611236
PMCID:
PMC5869852
DOI:
10.1042/CS20171028
[Indexed for MEDLINE]
Free PMC Article

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