SYNTHESIS AND SECRETION OF TRANSCOBALAMIN-II BY CULTURED ASTROCYTES DERIVED FROM HUMAN BRAIN-TISSUE

被引：19

作者：

BEGLEY, JA ^{[1
]}

COLLIGAN, PD ^{[1
]}

CHU, RC ^{[1
]}

机构：

[1] SAMUEL S STRATTON VET AFFAIRS MED CTR,NUTR LAB CLIN ASSESSMENT & RES,MED SERV 151E,ALBANY,NY 12208

来源：

JOURNAL OF THE NEUROLOGICAL SCIENCES | 1994年 / 122卷 / 01期

关键词：

TRANSCOBALAMINS; VITAMIN B-12; COBALAMIN; ASTROCYTOMA; BRAIN; NEUROBIOLOGY;

D O I：

10.1016/0022-510X(94)90051-5

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

Astrocytes derived from human brain tissue secreted a single cobalamin (vitamin B-12, Cbl) binding protein over a 4 day period in culture. Cycloheximide reversibly inhibited the release, and the binding protein was identified as transcobalamin II (TCII) based on molecular size, reaction with anti-human TCII antiserum, precipitation with 2.0 M ammonium sulfate and its ability to bind radioactive cyanocobalamin. It also enhanced the cellular incorporation of the vitamin. Our data show that cultured cells from human brain synthesize and secrete TCII and suggests that at least some of the TCII known to be present in cerebrospinal fluid may originate from within the central nervous system.

引用

页码：57 / 60

页数：4

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