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Temporal correlation of some endocrine circadian rhythms in elderly subjects.

Abstract：

:The aim of this chronobiological study was to investigate temporal correlations in the circadian patterns of 6 hormones, namely somatotrophic hormone (STH), prolactin (PRL), cortisol (F), aldosterone (ALD), insulin (IRI) and C-peptide (CP), assayed in systemic blood serum drawn at 07:00, 10:00, 13:00, 16:00, 19:00 and 22:00 h from an antecubital vein in 19 young subjects (aged 20-29 yr, comprising 10 males and 9 females; and 20 elderly subjects (aged 70-81 yr, comprising 10 males and 10 females). All subjects were sampled on a normal dietary sodium intake (120-140 mEq/24h) while following a social routine of diurnal activity (07:00-23:00) and nocturnal rest (23:00-07:00). Time-qualified data were analyzed by lead-lag correlation and by cosinor analysis. According to the lead-lag correlation findings, it would appear that the correlation which exists between several time-qualified series in young subjects is no longer present in elderly subjects. The circadian rhythms which were found to have lost their temporal correlations with advancing age were those between STH and IRI, STH and ALD, PRL and IRI, PRL and CP, and ALD and CP. It should be noted that the correlation between hormonal rhythms breaks down mainly on account of a peculiar age-related change in the magnitude of the circadian fluctuation. This chronological decline in amplitude led to the conclusion that the senescence of endocrine rhythmic functions is a biological phenomenon characterized by altered circadian variability.

journal_name

Maturitas

journal_title

Maturitas

authors

Cugini P,Lucia P,Tomassini R,Letizia C,Murano G,Scavo D,Tamburrano G,Maldonato A,Halberg F,Schramm A

doi

10.1016/0378-5122(85)90024-6

subject

Has Abstract,Author List Incomplete

pub_date

1985-07-01 00:00:00

pages

175-86

issue

2

eissn

0378-5122

issn

1873-4111

pii

0378-5122(85)90024-6

journal_volume

7

pub_type

杂志文章

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