Regulation of Parathyroid Hormone-Related Protein Secretion and mRNA Expression in Normal Human Keratinocytes and a Squamous Carcinoma Cell Line

1997 ◽  
Vol 232 (1) ◽  
pp. 79-89 ◽  
Author(s):  
Michelle T. Weckmann ◽  
Andrea Gröne ◽  
Charles C. Capen ◽  
Thomas J. Rosol
Keyword(s):  
Parathyroid Hormone ◽  
Protein Secretion ◽  
Carcinoma Cell ◽  
Squamous Carcinoma ◽  
Human Keratinocytes ◽  
Related Protein ◽  
Parathyroid Hormone Related Protein ◽  
Normal Human Keratinocytes ◽  
Normal Human ◽  
Squamous Carcinoma Cell

scholarly journals Parathyroid Hormone-Related Protein Production by Normal Human Keratinocytes in Vitro

1993 ◽  
Vol 208 (1) ◽  
pp. 68-74 ◽  
Author(s):  
James R. Werkmeister ◽  
Joyce I. Merryman ◽  
Laurie K. McCauley ◽  
John E. Horton ◽  
Charles C. Capen ◽  
...  
Keyword(s):  
Parathyroid Hormone ◽  
Protein Production ◽  
Human Keratinocytes ◽  
Related Protein ◽  
Parathyroid Hormone Related Protein ◽  
Normal Human Keratinocytes ◽  
Normal Human

Altered parathyroid hormone-related protein secretion and mRNA expression in squamous carcinoma cells in vitro

1996 ◽  
Vol 135 (4) ◽  
pp. 498-505 ◽  
Author(s):  
Andrea Gröne ◽  
Michelle T Weckmann ◽  
Carole L Steinmeyer ◽  
Charles C Capen ◽  
Thomas J Rosol
Keyword(s):  
Parathyroid Hormone ◽  
Mrna Expression ◽  
Protein Secretion ◽  
Three Dimensional ◽  
Squamous Carcinoma ◽  
Carcinoma Cells ◽  
Related Protein ◽  
Squamous Carcinoma Cells ◽  
Parathyroid Hormone Related Protein

Gröne A, Weckmann MT, Steinmeyer CL, Capen CC, Rosol TJ. Altered parathyroid hormone-related protein secretion and mRNA expression in squamous carcinoma cells in vitro. Eur J Endocrinol 1996;135:498–505. ISSN 0804–4643 Parathyroid hormone-related protein (PTHrP), a major factor in the pathogenesis of humoral hypercalcemia of malignancy, is produced by many squamous carcinoma cells (SCCs). Two SCC lines were grown in multilayered culture systems and compared to cells grown as monolayers to evaluate the effects of cell proliferation, confluence and differentiation on PTHrP secretion and mRNA expression. Well-differentiated (SCC 2/88) and poorly differentiated (SCC-A253) SCCs were grown as monolayer and three-dimensional cultures on collagen-coated membranes to compare the regulation of PTHrP expression and secretion by the cell lines in vitro. Parathyroid hormone-related protein secretion was evaluated by radioimmunoassay and immunohistochemistry. Messenger RNA expression was analyzed by RNase protection assay and in situ hybridization. Secretion of PTHrP was greatest in preconfluent SCC 2/88 cells in monolayer culture and decreased after confluence, which was the result of decreased PTHrP mRNA expression. In contrast, PTHrP secretion in cultures of SCC-A2 5 3 cells reached maximal levels after confluence. In multilayered cultures, total PTHrP secretion and mRNA expression remained high in both SCC 2/88 and SCC-A253 cells, and secretion by the multi-layered cultures was principally in the basal direction. Parathyroid hormone-related protein was present in all cell layers in three-dimensional cultures as determined by immunohistochemistry. These results indicated that multilayered cultures of SCCs produced PTHrP continuously, whereas decreased proliferation in monolayer cultures was associated with decreased PTHrP production. Multilayered cultures represent a better system to investigate PTHrP secretion and mRNA expression in vitro and PTHrP secretion by SCCs in vivo may be greatest by proliferating cells. Thomas J Rosol, 1925 Coffey Road, Columbus, OH 43210, USA

In vitro model of parathyroid hormone-related protein secretion from mammary cells isolated from lactating cows

1996 ◽  
Vol 13 (5) ◽  
pp. 399-410 ◽  
Author(s):  
H. Okada ◽  
F.L. Schanbacher ◽  
L.K. McCauley ◽  
M.T. Weckmann ◽  
C.C. Capen ◽  
...  
Keyword(s):  
Parathyroid Hormone ◽  
Protein Secretion ◽  
In Vitro Model ◽  
Mammary Cells ◽  
Related Protein ◽  
Lactating Cows ◽  
Parathyroid Hormone Related Protein ◽  
Vitro Model
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