Journal of Molecular Neuroscience

, Volume 4, Issue 2, pp 107–115 | Cite as

An acceleration of age-related increases in levels of the β-subunit of nerve growth factor in selected tissues from senescence-accelerated mice (SAM-P/8)

  • Ritsuko Katoh-Semba
  • Reiji Semba
  • Shigeo Kashiwamata
  • Kanefusa Kato


An investigation was made of age-related changes in levels of the β-subunit of nerve growth factor (β-NGF) in selected tissues and of testosterone in serum in senescence-accelerated mice (SAM-P/8) and in the control mice (senesence-resistant mice; SAM-R/1). The concentrations of testosterone in serum were higher in SAM-P/8 than in SAM-R/1 at ages 2 and 4 mo. The level of β-NGF in the thymus from SAM-R/1 increased with age, resulting in a statistically significant difference in its level between mice at ages 2 and 12 mo. By contrast, there was a transient increase in SAM-P/8 at around age 4 mo with a subsequent decrease. Consequently, significant differences were apparent in levels of β-NGF between the two types of mouse at ages 2 and 4 mo. Similar results were obtained in the adrenal gland and testis. Compared to SAM-R/1 at age 2 mo, the average concentrations of β-NGF in the hypophysis were higher in SAM-R/1 at ages 4 and 8 mo and in SAM-P/8 at all ages. In other tissues tested, no remarkable differences were detected. Our present results indicate that, in SAM-P/8, the elevation in levels of β-NGF in the thymus, adrenal gland, testis, and hypophysis occurs in the early period of life compared to the control mice. Possible dysfunction of the disorder of hypophysis is discussed.

Index Entries

Nerve growth factor age mice 


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Copyright information

© Humana Press Inc 1993

Authors and Affiliations

  • Ritsuko Katoh-Semba
    • 1
  • Reiji Semba
    • 2
  • Shigeo Kashiwamata
    • 3
  • Kanefusa Kato
    • 1
  1. 1.Departments of Perinatology and BiochemistryInstitute for Developmental Research, Aichi Prefecture ColonyAichiJapan
  2. 2.Department of AnatomyMie University, School of MedicineMieJapan
  3. 3.Aichi Prefecture/Kariya District Health CenterAichiJapan

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