{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,6]],"date-time":"2025-05-06T08:49:04Z","timestamp":1746521344984},"reference-count":39,"publisher":"The Endocrine Society","issue":"11","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2001,11,1]]},"abstract":"<jats:p>The molecular mechanisms leading to adrenocortical tumorigenesis have been only partially elucidated so far. Because the pituitary hormone ACTH, via activation of the cAMP pathway, regulates both cell proliferation\/differentiation and steroid synthesis in the adrenal cortex, in this study we focused on the cAMP-dependent transcription factors cAMP responsive element modulator (CREM) and cAMP responsive element binding protein (CREB). We studied CREM and CREB expression by RT-PCR in human normal adrenal cortex (n = 3), adrenocortical adenomas (n = 8), and carcinomas (n = 8). We found transcripts corresponding to the isoforms \u03b1, \u03b2, \u03b3, and \u03c42 of the CREM gene in all of the normal adrenal tissues, in the adenomas, and in seven of eight carcinomas. On the other hand, mRNA for the inducible cAMP early repressor isoforms, which derive from an internal promoter of CREM gene, was detected in the normal adrenal and in seven of eight adenomas, but in only three of eight carcinomas. Similarly, CREB transcripts were readily detectable in all normal adrenals and adenomas, whereas they were not found in four of eight adrenal carcinomas. To further characterize the carcinomas, telomerase activity and the expression of the ACTH receptor gene were determined. Telomerase activity in the carcinomas resulted in levels significantly higher than in the adenomas, whereas the levels of ACTH receptor mRNA were lower in the carcinomas. No correlation was found in the carcinomas between the levels of the ACTH receptor transcript and the loss of expression of CREB\/inducible cAMP early repressor, suggesting that this alteration is not secondary to an upstream disregulation at the receptor level. In conclusion, our results suggest that an alteration in cAMP signaling may be associated with malignancies of the adrenal cortex.<\/jats:p>","DOI":"10.1210\/jcem.86.11.8042","type":"journal-article","created":{"date-parts":[[2014,1,8]],"date-time":"2014-01-08T17:06:35Z","timestamp":1389200795000},"page":"5443-5449","source":"Crossref","is-referenced-by-count":12,"title":["Variable Expression of the Transcription Factors cAMP Response Element-Binding Protein and Inducible cAMP Early Repressor in the Normal Adrenal Cortex and in Adrenocortical Adenomas and Carcinomas"],"prefix":"10.1210","volume":"86","author":[{"given":"Alessandro","family":"Peri","sequence":"first","affiliation":[{"name":"Endocrine Unit (A.P., P.L., B.C., F.C., C.C., P.F., M.S., M.M.), 50139 Florence, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paola","family":"Luciani","sequence":"additional","affiliation":[{"name":"Endocrine Unit (A.P., P.L., B.C., F.C., C.C., P.F., M.S., M.M.), 50139 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