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    ISSN: 1432-1440
    Keywords: Key words Guanylyl cyclase ; Atrial natriuretic peptide ; Induction ; Lymphocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  There have been conflicting reports about the occurrence and/or activity of atrial natriuretic peptide (ANP) sensitive guanylyl cyclase in the immune system. This study reports on ANP-sensitive guanylyl cyclase mRNA expression and guanylyl cyclase activity in human peripheral blood mononuclear cells (PBMC). Reverse transcription polymerase chain reaction (RT-PCR) shows that activated human PBMC of healthy blood donors express functional active ANP-sensitive guanylyl cyclase after vitro culture, whereas freshly isolated PBMC show neither specific mRNA for particulate guanylyl cyclase nor ANP-sensitive activity of this enzyme. To define the subpopulation of PBMC expressing this enzyme, cultivated PBMC were subfractioned and analyzed by RT-PCR and in situ PCR. Only CD3+ PBMC showed mRNA for ANP-sensitive guanylyl cyclase. Induction of the guanylyl cyclase required coincubation with other cells, indicating that a factor or factors secreted from cells other than CD3+ cells induces this expression. In summary, ANP-sensitive guanylyl cyclase is an inducible enzyme in human CD3+ PBMC in contrast to other cells where it is considered to be constitutive.
    Type of Medium: Electronic Resource
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