PMID- 21458234 OWN - NLM STAT- MEDLINE DCOM- 20111207 LR - 20110725 IS - 1399-0020 (Electronic) IS - 0901-5027 (Linking) VI - 40 IP - 7 DP - 2011 Jul TI - In vitro investigation of the secondary palate development in two strains of mice. PG - 737-42 LID - 10.1016/j.ijom.2011.02.020 [doi] AB - The pathogenesis of cleft lip and palate (CL/P) is studied in animal experiments. This study revealed significant differences in foetal secondary palate development in two strains of mice (NMRI, A/WySnJ) using a palatal organ model. Palatal shelves of 114 NMRI embryos, resistant to cleft occurrence, and 93 A/WySnJ embryos, a strain with a high spontaneous CL/P rate, were micro-dissected at 14.25 GD (gestational day), before palatal fusion takes place. After cultivation in serum-free medium, palatal development was investigated microscopically and scored in a six-step system. At death (14.25 GD) the palatal shelves of the NMRI embryos (mean 3.5) were significant more developed than those of A/WySnJ (mean 2.7; p=0.05). After incubation, 53% (60/114) NMRI and 14% (13/93) A/WySnJ cultures had over two-thirds fusion to stage V-VI, therefore in 17% NMRI (19/114) and 1% A/WySnJ cultures (1/93) fusion was macroscopically complete. 62% of the A/WySnJ cultures showed no significant development in vitro (mean 2.84; p=0.094). There is a significant palatal development difference between normally developed NMRI (mean 4.45, p=0.05) and CL/P appearance in A/WySnJ mice (mean 2.84). Palatal development of both strains was significantly delayed in organ culture (p=0.05). The A/WySnJ strain was more susceptible to manipulation and vulnerable. CI - Copyright (c) 2011 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved. FAU - Scheller, K AU - Scheller K AD - Department of Oral and Maxillofacial Plastic Surgery, Martin-Luther-University Halle-Wittenberg, Germany. konstanze.weinzierl@medizin.uni-halle.de742 Scheller et al. FAU - Schubert, A AU - Schubert A FAU - Schubert, J AU - Schubert J LA - eng PT - Comparative Study PT - Journal Article DEP - 20110331 PL - Denmark TA - Int J Oral Maxillofac Surg JT - International journal of oral and maxillofacial surgery JID - 8605826 RN - 0 (Culture Media, Serum-Free) SB - IM MH - Animals MH - Cleft Lip/embryology MH - Cleft Palate/embryology MH - Culture Media, Serum-Free MH - Disease Models, Animal MH - Epithelium/embryology MH - Gestational Age MH - Mesoderm/embryology MH - Mice MH - Mice, Inbred A MH - Mice, Inbred Strains MH - Microdissection MH - Organ Culture Techniques MH - Organogenesis/*physiology MH - Palate/*embryology EDAT- 2011/04/05 06:00 MHDA- 2011/12/13 00:00 CRDT- 2011/04/05 06:00 PHST- 2009/08/05 00:00 [received] PHST- 2011/01/12 00:00 [revised] PHST- 2011/02/10 00:00 [accepted] PHST- 2011/04/05 06:00 [entrez] PHST- 2011/04/05 06:00 [pubmed] PHST- 2011/12/13 00:00 [medline] AID - S0901-5027(11)00095-6 [pii] AID - 10.1016/j.ijom.2011.02.020 [doi] PST - ppublish SO - Int J Oral Maxillofac Surg. 2011 Jul;40(7):737-42. doi: 10.1016/j.ijom.2011.02.020. Epub 2011 Mar 31.