Human medullary thyroid carcinoma in culture provides a model relating growth dynamics, endocrine cell differentiation, and tumor progression

C. L. Berger, A. de Bustros, B. A. Roos, S. S. Leong, G. Mendelsohn, M. S. Gesell, S. B. Baylin

Research output: Contribution to journalArticle

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Abstract

We used an unique model, human medullary thyroid carcinoma (MTC) in culture (the TT line), to study features of neuroendocrine-related biochemistry in relationship to growth, differentiation, and tumor progression. Tumor tissues from patients with virulent MTC contain a very heterogeneous distribution of cells staining for calcitonin (CT) and have a high ratio of intracellular L-dopa decarboxylase activity (DDC) to CT. We found, in a culture line of MTC derived from a patient with virulent disease, that the degree of the inverse relationship between DDC and CT and the heterogeneous cellular distribution of CT probably relate to the rate of cellular growth and the biochemical set of individual cell clones. During exponential growth of the parent TT cell line, intracellular DDC and CT varied. DDC increased by 70% and CT decreased by 40%. Single time-point measurements in 54 cell clones or highly enriched cell populations revealed a more dramatic variability for CT (15-fold) than for DDC (5-fold). During growth of the clones having the highest and lowest CT measurements, respectively, inverse dynamics between DDC and CT were again found. However, each clone maintained a distinct range of CT during the entire growth curve, with a 2- to 4-fold difference in CT between the two clones throughout. In the low producing CT clone, ratios between DDC and CT rose to greater than 1.0 during growth, a very high value found before this study only in MTC tissues from patients with virulant disease. Immunohistochemical staining for CT of parent cells and clones grown on embryonic chick skin revealed increased cellular heterogeneity for CT distribution during growth. The TT line provides a powerful tool to study neuroendocrine related biochemical events in relationship to growth, differentiation, and tumor progression in MTC. Our in vitro findings in the TT line well explain observations made previously in patients. We conclude that: (1) DDC, a neural property of MTC, is an early differentiation marker as compared to CT and that the differentiation status of MTC cells varies inversely with cell growth rate; and (2) in patients with MTC, the virulence of the tumor probably varies inversely with differentiation status. The inverse ratio of DDC to CT is probably determined in MTC by the proportion of rapidly growing cells and numbers of cell clones which have a poor ability for maturation.

Original languageEnglish
Pages (from-to)338-343
Number of pages6
JournalJournal of Clinical Endocrinology and Metabolism
Volume59
Issue number2
StatePublished - Oct 4 1984
Externally publishedYes

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Endocrine Cells
Calcitonin
Cell culture
Tumors
Cell Differentiation
Dopa Decarboxylase
Cells
Growth
Neoplasms
Clone Cells
Clone cells
Medullary Thyroid cancer
Tissue
Staining and Labeling
Biochemistry
Differentiation Antigens
Cell growth
Levodopa

ASJC Scopus subject areas

  • Biochemistry
  • Endocrinology, Diabetes and Metabolism

Cite this

Berger, C. L., de Bustros, A., Roos, B. A., Leong, S. S., Mendelsohn, G., Gesell, M. S., & Baylin, S. B. (1984). Human medullary thyroid carcinoma in culture provides a model relating growth dynamics, endocrine cell differentiation, and tumor progression. Journal of Clinical Endocrinology and Metabolism, 59(2), 338-343.

Human medullary thyroid carcinoma in culture provides a model relating growth dynamics, endocrine cell differentiation, and tumor progression. / Berger, C. L.; de Bustros, A.; Roos, B. A.; Leong, S. S.; Mendelsohn, G.; Gesell, M. S.; Baylin, S. B.

In: Journal of Clinical Endocrinology and Metabolism, Vol. 59, No. 2, 04.10.1984, p. 338-343.

Research output: Contribution to journalArticle

Berger, CL, de Bustros, A, Roos, BA, Leong, SS, Mendelsohn, G, Gesell, MS & Baylin, SB 1984, 'Human medullary thyroid carcinoma in culture provides a model relating growth dynamics, endocrine cell differentiation, and tumor progression', Journal of Clinical Endocrinology and Metabolism, vol. 59, no. 2, pp. 338-343.
Berger, C. L. ; de Bustros, A. ; Roos, B. A. ; Leong, S. S. ; Mendelsohn, G. ; Gesell, M. S. ; Baylin, S. B. / Human medullary thyroid carcinoma in culture provides a model relating growth dynamics, endocrine cell differentiation, and tumor progression. In: Journal of Clinical Endocrinology and Metabolism. 1984 ; Vol. 59, No. 2. pp. 338-343.
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