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Titolo:
Over-expression of the murine polymeric immunoglobulin receptor gene in the mammary gland of transgenic mice
Autore:
de Groot, N; van Kuik-Romeijn, P; Lee, SH; de Boer, HA;
Indirizzi:
Leiden Univ, Dept Med Biotechnol, NL-2300 RA Leiden, Netherlands Leiden Univ Leiden Netherlands NL-2300 RA NL-2300 RA Leiden, Netherlands
Titolo Testata:
TRANSGENIC RESEARCH
fascicolo: 2, volume: 8, anno: 1999,
pagine: 125 - 135
SICI:
0962-8819(199904)8:2<125:OOTMPI>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
BASOLATERAL SORTING SIGNAL; HIGH-LEVEL EXPRESSION; SECRETORY COMPONENT; IG RECEPTOR; EPITHELIAL-CELLS; MOUSE MILK; MOLECULAR-CLONING; MUCOSAL SURFACES; IMMUNE-SYSTEM; MESSENGER-RNA;
Keywords:
polymeric immunoglobulin receptor; secretory component; secretory IgA; mammary gland; transgenic mice; over-expression;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: de Groot, N Leiden Univ, Dept Med Biotechnol, POB 9502, NL-2300 RA Leiden,Netherlands Leiden Univ POB 9502 Leiden Netherlands NL-2300 RA etherlands
Citazione:
N. de Groot et al., "Over-expression of the murine polymeric immunoglobulin receptor gene in the mammary gland of transgenic mice", TRANSGEN RE, 8(2), 1999, pp. 125-135

Abstract

The polymeric immunoglobulin receptor (pIgR), a transmembrane protein, transports dimeric IgA (dIgA) across the epithelial cells of the mucosal surfaces into the external secretions, for example milk from the mammary glands. The pIgR is consumed during the transcytosis of dIgA and is cleaved at theapical side of the epithelial cells, regardless of the binding to its ligand (dIgA), to form secretory component (SC). We hypothesize that the expression level of the endogenous murine pIgR gene in the epithelial cells is rate-limiting for the transport of dIgA across the epithelial cells into the secretions. We address this key issue by generating transgenic mice over-expressing the pIgR gene in their mammary glands in order to examine the effect on dIgA levels in the milk. Here we report on the generation of transgenic mice and analysis of the expression level of pIgR in their mammary glands. We cloned and characterized the murine pIgR gene and constructed an expression cassette bearing the pIgR gene under the control of the regulatory sequences of the bovine alpha(s1)-casein gene. Four transgenic lines were made, expressing the pIgR construct at RNA and protein level only in their mammary glands. The levels of the SC protein in the milk ranged from 0.1 to 2.7 mg/ml during mid-lactation. These levels are 10-270 times higher than wild-type SC levels (0.01 mg/ml).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/07/20 alle ore 19:47:18