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第44卷第4期               贺雪珂,姜志胜,杨中州,等. Coq4基因全敲除小鼠胚胎发育的表型分析[J].
                  2024年4月                     南京医科大学学报(自然科学版),2024,44(04):462-468                       ·467 ·


                                          E6.5                             E7.5
                                                                epc
                                         epc
                                                                 ch
                                          exe
                                                                exc
                               WT         pac                   am Al⁃bud
                                             m               eve  ac
                                                              m
                                         ee                     ec
                                             eve
                                                    A                      C                     E

                                                                 epc


                               Coq4 -/-
                                                              eve
                                                                m
                                                                  ac
                                                                 ec
                                                                                           500 μm
                                                    B                      D                     F
                   A:WT whole embryo diagram at E6.5 by HE staining(×200). B:Coq4 -/-  whole embryo diagram at E6.5 by HE staining(×200). C:WT whole
                embryo diagram at E7.5 by HE staining(×100). D:Coq4 -/-  whole embryo diagram at E7.5 by HE staining(×200). E:A scintigraphy image of WT
                                                   -/-
                embryo at E7.5(×63). F:A scintigraphy image of Coq4 embryo at E7.5(×63). epc:ectoplacental cone;exe:extraembryonic ectoderm;pac:proamniotic
                cavity;eve:embryonic visceral endoderm;m:mesoderm;ee:embryonic ectoderm;ec:ectoderm;ac:amniotic cavity;am:amnion;Al⁃bud:allantoic bud;
                exc:exocoelomic cavity;ch:chorion.
                                                                               -/-
                                          图6 HE染色观察E6.5和E7.5时WT组和Coq4 组胚胎
                      Figure 6 Observation of mouse embryos in the WT group and Coq4 group by HE staining at E6.5 and E7.5
                                                                           -/-
                膜板形成缺陷。组织学和细胞特异性标志物免疫                             胚胎心脏发育       [15] 。但本研究发现Coq4 小鼠胚胎于
                                                                                                     ⁃/⁃
                荧光染色结果进一步表明细胞增殖能力下降,滋养                            E7.5 原肠胚形成阶段就开始出现发育异常。基于
                层细胞浅层侵袭,胚胎早期生长迟缓和原肠胚形成                            Perez⁃Garcia 等 [16] 对数据库中胚胎致死的基因进
                期胚胎致死。                                            行大规模胎盘表型筛查分析的结果,猜测 Coq4 敲
                    笔者课题组早期研究发现 Coq4 受到 SRCAP                     除后胎盘缺陷是导致小鼠胚胎发育性死亡的关键
                重构复合物的直接调控,猜测 Coq4 可能影响早期                         因素。


                    A           DAPI              Tpbpa              Merge
                                                                                   B
                                                                                         15
                                                                                                  ***
                                                                                        (%)
                                                                                      Tpbpa area in  the rectangle  5
                       WT                                                                10




                                                                                          0
                                                                                              WT     Coq4 -/-


                       Coq4 -/-






                                                   -/-
                                                                                                     ***
                A:Immunofluorescence image of Tpbpa in WT and Coq4 placenta at E8.5(×100). B:Quantitication of Tpbpa area in the selected area, P<0.001(n=6).
                                              图7   WT组和Coq4 组胎盘的免疫荧光分析
                                                              -/-
                           Figure 7  Immunofluorescence analysis of mouse embryos in the WT group and Coq4 group
                                                                                              -/-
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