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[Pituitary adenomas with cells containing bêta MSH, alpha and bêta endorphins and without ACTH (author's transl)]
Annales D'Endocrinologie
|January 1, 1979
Abstract:
By using immunohistoenzymatic techniques, cells of 4 pituitary adenomas are revealed with beta MSH, alpha and beta endorphins antisera but do not react with 1--24 and 17--39 ACTH antisera. These data suggest that adenomatous cells are able to synthesize and LPH-like molecule without ACTH. The levels of plasmatic LPH and beta MSH, studied by RIA, stay normal. These results are discussed.
Insights
Pituitary adenoma cells can produce lipotropic hormone (LPH)-like molecules and endorphins without ACTH. Plasmatic levels of LPH and beta MSH remain normal in these cases.
Area of Science:
- Endocrinology
- Neuroscience
- Oncology
Context:
- Pituitary adenomas are tumors arising from the pituitary gland.
- Understanding the specific hormone production of pituitary adenomas is crucial for diagnosis and treatment.
- Previous studies have focused on ACTH-producing adenomas, but the synthesis of other related peptides remains less understood.
Purpose:
- To investigate the synthesis of beta-melanocyte-stimulating hormone (beta MSH), endorphins, and adrenocorticotropic hormone (ACTH) in pituitary adenomas.
- To determine if pituitary adenoma cells can produce lipotropic hormone (LPH)-like molecules independently of ACTH.
- To correlate the in-situ findings with plasma levels of LPH and beta MSH.
Summary:
- Immunohistoenzymatic techniques revealed that cells from four pituitary adenomas expressed beta MSH, alpha-endorphins, and beta-endorphins.
- These adenoma cells did not react with antisera for 1-24 and 17-39 ACTH, suggesting a lack of ACTH synthesis.
- Radioimmunoassay (RIA) demonstrated normal plasma levels of LPH and beta MSH, despite the tumor cells' potential to synthesize LPH-like molecules without ACTH.
Impact:
- These findings suggest that certain pituitary adenomas can synthesize LPH-like molecules and endorphins without producing ACTH.
- This highlights the heterogeneity of hormone production in pituitary adenomas.
- Further research into these distinct cellular pathways could lead to more targeted diagnostic and therapeutic strategies for specific pituitary tumor types.