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- W3033421246 abstract "Ehlers-Danlos syndromes (EDSs) are heterogeneous group of heritable connective tissue disorders characterized by joint and skin hyperextensibility as well as fragility of various organs. Recently, we described a new type of EDS, musculocontractual EDS (mcEDS-CHST14), caused by pathogenic variants of the carbohydrate sulfotransferase 14 (CHST14) gene mutation. B6;129S5-Chst14tm1Lex/Mmucd (B6;129-Chst14 KO) mice are expected to be an animal model of mcEDS-CHST14. However, >90% of B6;129-Chst14 KO homozygous (B6;129-Chst14-/-) mice show perinatal lethality. Therefore, improvement of the birth rate of Chst14-/- mice is needed to clarify the pathophysiology of mcEDS-CHST14 using this animal model. Some B6;129-Chst14-/- embryos had survived at embryonic day 18.5 in utero, suggesting that problems with delivery and/or childcare may cause perinatal lethality. However, in vitro fertilization and egg transfer did not improve the birth rate of the mice. A recent report showed that backcrossing to C57BL/6 strain induces perinatal death of all Chst14-/- mice, suggesting that genetic background influences the birthrate of these mice. In the present study, we performed backcrossing of B6;129-Chst14 KO mice to a BALB/c strain, an inbred strain that shows lower risks of litter loss than C57BL/6 strain. Upon backcrossing 1 to 12 times, the birth rate of Chst14-/- mice was improved with a birth rate of 6.12-18.64%. These results suggest that the genetic background influences the birth rate of Chst14-/- mice. BALB/c congenic Chst14-/- (BALB.Chst14-/-) mice may facilitate investigation of mcEDS-CHST14. Furthermore, backcrossing to an appropriate strain may contribute to optimizing animal experiments." @default.
- W3033421246 created "2020-06-12" @default.
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- W3033421246 date "2020-01-01" @default.
- W3033421246 modified "2023-10-01" @default.
- W3033421246 title "Backcrossing to an appropriate genetic background improves the birth rate of carbohydrate sulfotransferase 14 gene-deleted mice" @default.
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- W3033421246 doi "https://doi.org/10.1538/expanim.19-0150" @default.
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