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  • Title: Hypercalcemia induced by ovarian clear cell carcinoma producing all transcriptional variants of parathyroid hormone-related peptide gene during pregnancy.
    Author: Hwang CS, Park SY, Yu SH, Park JY, Park CT, Han KO.
    Journal: Gynecol Oncol; 2006 Nov; 103(2):740-4. PubMed ID: 16956653.
    Abstract:
    BACKGROUND: Parathyroid hormone-related peptide (PTHrP) appears as the major causative agent responsible for the humoral hypercalcemia of malignancy (HHM). However, the use of promoters and splicing patterns of PTHrP gene in HHM have not been reported yet. CASE: A 35-year-old woman was diagnosed as an ovarian clear cell carcinoma with HHM caused by elevated serum PTHrP after delivery. An immunohistochemical study showed PTHrP expression in the tumor tissue. The Southern blot analysis following RT-PCR confirmed the presence of all types of PTHrP mRNA transcripts produced by a combination of three promoters, one 5' alternative splicing and three alternative 3' splicing events. CONCLUSION: An ovarian clear cell carcinoma induced PTHrP-related HHM, which resulted from the high expression of all isoforms for PTHrP gene.
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