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Catecholamine excretion in old age.

T Olsson1, M Viitanen, E Hägg

  • 1Department of Internal Medicine, Umeå University, Sweden.

Aging (Milan, Italy)
|September 1, 1991
PubMed
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Elderly individuals show decreased dopamine excretion with age, and higher levels in men. Smoking significantly increases epinephrine and norepinephrine excretion in older adults.

Area of Science:

  • Gerontology
  • Endocrinology
  • Urology

Background:

  • Catecholamines are crucial neurotransmitters and hormones affecting various physiological processes.
  • Age-related changes in catecholamine metabolism and excretion are not fully understood in non-hospitalized elderly populations.

Purpose of the Study:

  • To investigate the influence of age, sex, smoking, and body mass index on urinary catecholamine excretion in elderly individuals.
  • To analyze the relationship between kidney function (creatinine clearance) and catecholamine levels in older adults.

Main Methods:

  • Studied 24-hour urinary catecholamine (dopamine, epinephrine, norepinephrine) excretion in two non-hospitalized groups: 60-year-olds (N=35) and 80-year-olds (N=29).
  • Utilized multi-way analysis of variance and analysis of covariance to assess the impact of various factors.

Related Experiment Videos

  • Correlated body mass index and creatinine clearance with catecholamine excretion levels.

    • Main Results:

    • A significant age-related decline in urinary dopamine excretion was observed (p=0.001).
    • Men exhibited higher dopamine excretion than women (p=0.04).
    • Smoking was strongly associated with increased epinephrine (p=0.001) and norepinephrine (p=0.04) excretion.
    • Body mass index showed a negative correlation with epinephrine excretion (p<0.05).
    • Age significantly impacted dopamine, creatinine clearance affected dopamine and norepinephrine, and smoking influenced epinephrine excretion.

    Conclusions:

    • Age, gender, smoking habits, body mass, and kidney function are significant determinants of catecholamine excretion in the elderly.
    • These findings highlight the complex interplay of lifestyle and physiological factors on neuroendocrine function in aging.