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XB-ART-50097
Dev Biol March 1, 2015; 399 (1): 164-176.

The requirement of histone modification by PRDM12 and Kdm4a for the development of pre-placodal ectoderm and neural crest in Xenopus.

Matsukawa S , Miwata K , Asashima M , Michiue T .


Abstract
In vertebrates, pre-placodal ectoderm and neural crest development requires morphogen gradients and several transcriptional factors, while the involvement of histone modification remains unclear. Here, we report that histone-modifying factors play crucial roles in the development of pre-placodal ectoderm and neural crest in Xenopus. During the early neurula stage, PRDM12 was expressed in the lateral pre-placodal ectoderm and repressed the expression of neural crest specifier genes via methylation of histone H3K9. ChIP-qPCR analyses indicated that PRDM12 promoted the occupancy of the trimethylated histone H3K9 (H3K9me3) on the Foxd3, Slug, and Sox8 promoters. Injection of the PRDM12 MO inhibited the expression of presumptive trigeminal placode markers and decreased the occupancy of H3K9me3 on the Foxd3 promoter. Histone demethylase Kdm4a also inhibited the expression of presumptive trigeminal placode markers in a similar manner to PRDM12 MO and could compensate for the effects of PRDM12. ChIP-qPCR analyses revealed that promotion of the occupancy of H3K9me3 on the Foxd3, Slug, and Sox8 promoters was inhibited by Kdm4a overexpression. Taken together, these data indicate that histone modification was essential for pre-placodal ectoderm and neural crest development.

PubMed ID: 25576027
Article link: Dev Biol

Genes referenced: bmp4 chrd.1 dkk1 ebf3 foxd3 isl1 kdm4a myc neurod4 odc1 pax3 pax6 prdm12 sdhd six1 six3 snai2 sox2 sox8 sox9 wnt3a wnt8a
Morpholinos: prdm12 MO1


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