Tetrasomy 21 pter-->q22.1 and Down syndrome: molecular definition of the region.
Tetrasomy 21 pter-->q22.1 and Down syndrome: molecular definition of the region.
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四体 21 pter-->q22.1 和唐氏综合症:该区域的分子定义。
DOI:
10.1002/ajmg.1320530411
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发表时间:
1994
期刊:
影响因子:
--
通讯作者:
Korenberg,JR
中科院分区:
文献类型:
--
作者:
Daumer-Haas,C;Schuffenhauer,S;Walther,JU;Schipper,RD;Porstmann,T;Korenberg,JR
Down syndrome is usually caused by complete trisomy 21. Rarely, it is due to partial trisomy of the segment 21q22. We report on a 33‐month‐old girl with tetrasomy 21 pter → q22.1 resulting from an extra chromosome idic(21)(q22.1). She has craniofacial traits typical of Down syndrome, including brachycephaly, third fontanel, upward slanting palpebral fissures, round face, and protruding tongue. Speech development is quite delayed whereas motor development is only mildly retarded. The molecular content of the extra isodicentric chromosome was defined by molecular genetic investigations using 13 single copy probes unique to chromosome 21, and SOD1 expression studies. The child was found to have 4 copies of the region defined byD21S16(21cen) throughD21S93on 21q22.1 and two copies of the remaining region defined by SOD1 →D21S55→D21S123. In view of the recent assignment of Down syndrome facial characters to the 21q22 region, defined in part byD21S55, it is significant that this child shows a subset of Down syndrome facial manifestations, without duplication of this region. These results suggest that genes contributing to the facial and some of the hand manifestations of Down syndrome also exist in the chromosomal region proximal toD21S55in band 21q22.1. © 1994 Wiley‐Liss, Inc.
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影响因子:
14.9
作者:
Gordon D. Stewart;P. Harris;J. Galt;Malcolm A. Ferguson
通讯作者:
Malcolm A. Ferguson
影响因子:
9.8
作者:
Epstein,CJ;Korenberg,JR;Annerén,G;Antonarakis,SE;Aymé,S;Courchesne,E;Epstein,LB;Fowler,A;Groner,Y;Huret,JL
通讯作者:
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影响因子:
14.9
作者:
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影响因子:
8
作者:
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通讯作者:
R. Reed
DOI:
10.1073/pnas.84.17.6131
发表时间:
1987-09-01
影响因子:
11.1
作者:
REDDY, ESP;RAO, VN;PAPAS, TS
通讯作者:
PAPAS, TS