Abstract：
:Digital video imaging indicated that about 80% of fura-2-loaded single human thyroid cells responded to TSH, resulting in an increase in intracellular Ca2+ concentration ([Ca2+]i). Most of the TSH-sensitive cells further responded to N6-(L-2-phenylisopropyl)-adenosine (PIA) showing a transient [Ca2+]i rise in a PIA dose-dependent manner. Addition of PIA prior to TSH administration had no effect or showed only a slight [Ca2+]i increase, but in about 80% of the cells, regardless of the response to PIA, the addition of TSH after PIA resulted in a higher transient [Ca2+]i response than that in the absence of PIA. Inactivation of Gi/G(o) by pertussis toxin (PTX) treatment markedly reduced the effect of PIA on TSH action to the level induced by PIA alone. Immunoglobulin fractions obtained from two Graves' patients with high TSAb (antibody activity measured by cAMP response) activity induced [Ca2+]i increase and cooperated with PIA. Under the same conditions, TSH-dependent cAMP accumulation was inhibited by PIA. These results suggest that adenosine Ai receptor is expressed in human thyroid cells in primary culture as well as in FRTL-5 rat thyroid cells, and that in the presence of adenosine. TSH or Graves' IgG signal tends to be directed to the Ca2+ pathway in the human thyroid.
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Yanagita Y,Okajima F,Sho K,Nagamachi Y,Kondo Ydoi
10.1016/0303-7207(96)03765-3subject
Has Abstractpub_date
1996-04-19 00:00:00pages
47-56issue
1-2eissn
0303-7207issn
1872-8057journal_volume
118pub_type
杂志文章abstract：:Primary aldosteronism (PA) encompasses a broad, heterogeneous group of disorders including both sporadic and familial forms (familial hyperaldosteronism type I, II and III). PA is the most common form of secondary hypertension and associated with a higher rate of cardiovascular complications, compared with essential h...
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journal_title：Molecular and cellular endocrinology
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更新日期：1983-12-01 00:00:00
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journal_title：Molecular and cellular endocrinology
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更新日期：2015-01-05 00:00:00
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更新日期：2015-01-05 00:00:00
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journal_title：Molecular and cellular endocrinology
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journal_title：Molecular and cellular endocrinology
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journal_title：Molecular and cellular endocrinology
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journal_title：Molecular and cellular endocrinology
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journal_title：Molecular and cellular endocrinology
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journal_title：Molecular and cellular endocrinology
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