homeostasis/metabolism
• after subcutaneous injection of rPTH, male mutants show elevated cAMP levels at all times after injection vs wild-type, with the peak concentration occurring at 15-20 minutes
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• level are lower in males (14.4 pg/ml) than wild-type male littermates (46 pg/ml)
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• in response to minimal infusion dose of PTH which induces mild hypocalcemia in wild-type, male mutants show striking increases in serum calcium levels; peak calcium level after 3 day infusion is 12.5 mg/dl in wild-type vs 22.2 mg/dl in mutants
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• levels are lower in males (6.39 mg/dl) vs wild-type males (7.46 mg/dl)
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skeleton
• cultured osteoblasts from mutants show sustained increase in cAMP levels in response to parathyroid hormone
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cellular
• cultured osteoblasts from mutants show sustained increase in cAMP levels in response to parathyroid hormone
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