PMID- 10328927 OWN - NLM STAT- MEDLINE DCOM- 19990617 LR - 20111117 IS - 0012-1606 (Print) IS - 0012-1606 (Linking) VI - 209 IP - 2 DP - 1999 May 15 TI - Isolation of novel cDNAs by subtractions between the anterior mesendoderm of single mouse gastrula stage embryos. PG - 369-80 AB - The anterior mesendoderm of mid- to late primitive streak stage mouse embryos has the ability to induce anterior neuroectodermal fate in naive epiblast [S.-L. Ang and J. Rossant (1993) Development 118, 139-149]. A number of genes have been found to be expressed in this tissue, notably the transcription factor Lim1. Lim1-null mice have anterior mesendoderm defects that result in a lack of head formation. Thus, the anterior mesendoderm of gastrula stage mouse embryos should express Lim1-regulated genes that are essential for head development. To identify Lim1-regulated genes, a differential screen with subtraction was developed, using cDNA pools that were amplified from the anterior mesendoderm of single wild-type and Lim1-null gastrula stage embryos. This novel screen strategy has yielded 22 cDNAs that show differential expression between anterior mesendoderm cells of wild-type and Lim1-null embryos. The expression of one novel cDNA SII6 initially colocalizes with Lim1 in the anterior mesendoderm of gastrula stage embryos. Moreover, SII6 expression is undetectable in the anterior mesendoderm of Lim1-null embryos. This screen identifies a set of putative Lim1 target genes that may have important roles in vertebrate head formation. Furthermore, this differential screen strategy should provide a broadly applicable approach to identify differences in gene expression between embryonic tissues of limiting quantity. CI - Copyright 1999 Academic Press. FAU - Shimono, A AU - Shimono A AD - Department of Molecular Genetics, University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas, 77030, USA. FAU - Behringer, R R AU - Behringer RR LA - eng GR - CA16672/CA/NCI NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Dev Biol JT - Developmental biology JID - 0372762 RN - 0 (DNA, Complementary) RN - 0 (Homeodomain Proteins) RN - 0 (LIM-Homeodomain Proteins) RN - 0 (Lhx1 protein, mouse) RN - 0 (Transcription Factors) SB - IM MH - Animals MH - DNA, Complementary/genetics/*isolation & purification MH - Embryonic Induction MH - Embryonic and Fetal Development/*genetics MH - Endoderm/*chemistry/cytology MH - Gastrula/*chemistry/cytology MH - *Gene Expression Regulation, Developmental MH - Gene Library MH - Gestational Age MH - Homeodomain Proteins/physiology MH - LIM-Homeodomain Proteins MH - Mesoderm/*chemistry/cytology MH - Mice MH - Mice, Knockout MH - Subtraction Technique MH - Transcription Factors MH - Transcription, Genetic EDAT- 1999/05/18 00:00 MHDA- 1999/05/18 00:01 CRDT- 1999/05/18 00:00 PHST- 1999/05/18 00:00 [pubmed] PHST- 1999/05/18 00:01 [medline] PHST- 1999/05/18 00:00 [entrez] AID - S0012-1606(99)99256-4 [pii] AID - 10.1006/dbio.1999.9256 [doi] PST - ppublish SO - Dev Biol. 1999 May 15;209(2):369-80. doi: 10.1006/dbio.1999.9256.