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GH3 pituitary adenoma cells can reverse thymic aging in rats.

Kelley, K W, Brief, S, Westly, H J, Novakofski, J, Bechtel, P J, Simon, J, Walker, E B·1986·Proceedings of the National Academy of Sciences
DOI 10.1073/pnas.83.15.5663
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Abstract

Thymic size and T-cell function decrease with age, and it has not yet been possible to totally reverse this thymic atrophy and completely restore T-cell-dependent immune functions. In this study, GH3 pituitary adenoma cells, which secrete growth hormone and prolactin, were implanted subcutaneously into 16- and 22-month-old female Wistar-Furth rats and the rats were sacrificed approximately 2 months later. Only thymic remnants were detected in aged, non-implanted rats, but thymus glands were found in both the 18- and the 24-month-old rats that had been implanted with GH3 cells. Thymus glands from the GH3-implanted 18-month-old rats contained distinct cortical thymocytes and medullary epithelial cells. Depending on the concentration of phytohemagglutinin or concanavalin A, T-cell proliferative responses of splenocytes from these implanted rats were 2- to 5-fold greater than those of 18-month-old controls. At the optimal concentration of mitogen, proliferative responses to either lectin could be restored to those levels observed in splenocytes from 3-month-old Wistar-Furth females. Thymus glands from 24-month-old GH3-implanted rats contained more cortical thymocytes and fewer fat vacuoles than controls, but they were not totally reconstituted. No significant lectin-induced T-cell proliferative responses or IL-2 secretion were detected in 24-month-old control rats, but splenocytes from GH3-implanted rats showed augmented T-cell proliferative responses and increased synthesis of IL-2. Fluorescence-activated cell-sorter analysis of thymocytes revealed that 24-month-old rats implanted with GH3 cells had a higher proportion of lymphocytes with the Thy-1.1 and helper-T-cell phenotypes. These data show that it is possible to regenerate normal thymic tissue in situ and reverse the natural loss in cell-mediated immunity that occurs with aging.

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Metadata

Authors
Kelley, K. W., Brief, S., Westly, H. J., Novakofski, J., Bechtel, P. J., Simon, J., & Walker, E. B.
Venue
Proceedings of the National Academy of Sciences
Publisher
National Academy of Sciences
Published
1986-08
Volume
83
Issue
15
Pages
5663-5667
ISSN
  • 0027-8424
  • 1091-6490
DOI
10.1073/pnas.83.15.5663
Cited by
176
References
1
Language
en

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CoChat. (2026). Citation check: GH3 pituitary adenoma cells can reverse thymic aging in rats. https://app.cochat.ai/papers/10.1073/pnas.83.15.5663
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Kelley, K. W., Brief, S., Westly, H. J., Novakofski, J., Bechtel, P. J., Simon, J., & Walker, E. B. (1986). GH3 pituitary adenoma cells can reverse thymic aging in rats. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.83.15.5663