Tissue distribution of beta 3-adrenergic receptor mRNA in man.
J Clin Invest
; 91(1): 344-9, 1993 Jan.
Article
en En
| MEDLINE
| ID: mdl-8380813
ABSTRACT
Expression of mRNA for beta 1-, beta 2-, and beta 3-adrenergic receptors (beta 1-, beta 2-, and beta 3-AR) was investigated in human tissues. beta 1- and beta 2-AR mRNA distribution correlated with that of the cognate receptors established by pharmacological studies. beta 3-AR transcripts were abundant in infant perirenal brown adipose tissue, characterized by the presence of uncoupling protein (UCP) mRNA. In adult whole adipose tissues, beta 3-AR mRNA levels were high in deep deposits such as perirenal and omental, and lower in subcutaneous. In these deposits, UCP mRNA levels paralleled those of beta 3-AR. However, isolated omental and subcutaneous adipose cells, enriched in white adipocytes, expressed beta 3-AR but no UCP transcripts. beta 3-AR mRNA was highly expressed in gallbladder, and to a much lower extent in colon, independently of UCP mRNA. Quadriceps or abdominal muscles, heart, liver, lung, kidney, thyroid, and lymphocytes did not express intrinsic beta 3-AR mRNA. This study demonstrates that substantial amounts of brown adipocytes exist throughout life in adipose deposits, which are generally classified as white. These deposits are the main sites of beta 3-AR expression, which also occurs in gallbladder and colon. beta 3-AR may thus be involved in the control of lipid metabolism, possibly from fat assimilation in the digestive tract, to triglyceride storage and mobilization in adipose tissues.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
ARN Mensajero
/
Receptores Adrenérgicos beta
Límite:
Adult
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Aged
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Child
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Child, preschool
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Female
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Humans
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Infant
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Male
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Middle aged
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Newborn
Idioma:
En
Revista:
J Clin Invest
Año:
1993
Tipo del documento:
Article
País de afiliación:
Francia