Involvement of RhoA-mediated Ca2+ sensitization in antigen-induced bronchial smooth muscle hyperresponsiveness in mice

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Involvement of RhoA-mediated Ca2+ sensitization in antigen-induced bronchial smooth muscle hyperresponsiveness in mice

BACKGROUND It has recently been suggested that RhoA plays an important role in the enhancement of the Ca2+ sensitization of smooth muscle contraction. In the present study, a participation of RhoA-mediated Ca2+ sensitization in the augmented bronchial smooth muscle (BSM) contraction in a murine model of allergic asthma was examined. METHODS Ovalbumin (OA)-sensitized BALB/c mice were repeatedl...

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The role of RhoA-mediated Ca2+ sensitization of bronchial smooth muscle contraction in airway hyperresponsiveness.

Smooth muscle contraction is mediated by Ca2+-dependent and Ca2+-independent pathways. The latter Ca2+-independent pathway, termed Ca2+ sensitization, is mainly regulated by a monomeric GTP binding protein RhoA and its downstream target Rho-kinase. Recent studies suggest a possible involvement of augmented RhoA/Rho-kinase signaling in the elevated smooth muscle contraction in several human dise...

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Glucocorticoids ameliorate antigen-induced bronchial smooth muscle hyperresponsiveness by inhibiting upregulation of RhoA in rats.

To determine the mechanism(s) of the inhibitory effect of glucocorticoids on airway hyperresponsiveness in allergic bronchial asthma, the effects of systemic treatment with glucocorticoids on bronchial smooth muscle hyperresponsiveness and RhoA upregulation were investigated in rats with allergic bronchial asthma. Rats were sensitized and repeatedly challenged with 2,4-dinitrophenylated Ascaris...

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Inhibition of geranylgeranyltransferase inhibits bronchial smooth muscle hyperresponsiveness in mice.

Recent studies revealed an involvement of RhoA/Rho-kinase in the contraction of bronchial smooth muscle (BSM), and this pathway has now been proposed as a new target for asthma therapy. A posttranslational geranylgeranylation of RhoA is required for its activation. Thus selective inhibition of geranylgeranyltransferase may be a novel strategy for treatment of the BSM hyperresponsiveness in asth...

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Upregulation of rhoA mRNA in bronchial smooth muscle of antigen-induced airway hyperresponsive rats.

It has recently been suggested that RhoA plays an important role in the enhancement of Ca2+ sensitization observed in smooth muscle contraction. In the present study, the expression of rhoA mRNA in the bronchial smooth muscle of antigen-induced airway hyperresponsive rats was compared with that of control animals. Reverse transcription-polymerase chain reaction experiments using total RNA from ...

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ژورنال

عنوان ژورنال: Respiratory Research

سال: 2005

ISSN: 1465-993X

DOI: 10.1186/1465-9921-6-4