Rhodioloside has been shown to protect cells from hypoxia injury,and bone marrow mesenchymal stem cells have a good effect on tissue repair.To study the effects of rhodioloside and bone marrow mesenchymal stem cells o...Rhodioloside has been shown to protect cells from hypoxia injury,and bone marrow mesenchymal stem cells have a good effect on tissue repair.To study the effects of rhodioloside and bone marrow mesenchymal stem cells on spinal cord injury,a rat model of spinal cord injury was established using the Infinite Horizons method.After establishing the model,the rats were randomly divided into five groups.Rats in the control group were intragastrically injected with phosphate buffered saline(PBS)(5μL).PBS was injected at 6 equidistant points around 5 mm from the injury site and at a depth of 5 mm.Rats in the rhodioloside group were intragastrically injected with rhodioloside(5 g/kg)and intramuscularly injected with PBS.Rats in the mesenchymal stem cell(MSC)group were intramuscularly injected with PBS and intramuscularly with MSCs(8×10^6/mL in a 50-μL cell suspension).Rats in the Ad-HIF-MSC group were intragastrically injected with PBS and intramuscularly injected with HIF-1 adenovirus-infected MSCs.Rats in the rhodioloside+Ad-HIF-MSC group were intramuscularly injected with MSCs infected with the HIF-1 adenovirus and intragastrically injected with rhodioloside.One week after treatment,exercise recovery was evaluated with a modified combined behavioral score scale.Hematoxylin-eosin staining and Pischingert’s methylene blue staining were used to detect any histological or pathological changes in spinal cord tissue.Levels of adenovirus IX and Sry mRNA were detected by real-time quantitative polymerase chain reaction and used to determine the number of adenovirus and mesenchymal stem cells that were transfected into the spinal cord.Immunohistochemical staining was applied to detect HIF-1 protein levels in the spinal cord.The results showed that:(1)compared with the other groups,the rhodioloside+Ad-HIF-MSC group exhibited the highest combined behavioral score(P<0.05),the most recovered tissue,and the greatest number of neurons,as indicated by Pischingert’s methylene blue staining.(2)Compared with the PBS group,HIF-1 pro展开更多
SOX家族是一类SRY(sex determination region of Ychomosome)相关基因构成的基因家族,编码一系列SOX(SRY-related HMG-box)家族的转录因子,参与胚胎发育和细胞命运(cell fate)决定的调控,所有成员的共同特点是均含有一个与SRY相关的HMG ...SOX家族是一类SRY(sex determination region of Ychomosome)相关基因构成的基因家族,编码一系列SOX(SRY-related HMG-box)家族的转录因子,参与胚胎发育和细胞命运(cell fate)决定的调控,所有成员的共同特点是均含有一个与SRY相关的HMG box同源的高度保守的HMG-box DNA结合域。SOX基因家族是进化过程中高度保守的一族基因,参与胚胎发育的转录调控,决定细胞的归宿,对多种组织器官的发育具有重要的作用,并参与人类性别的决定。因此,SOX家族基因的研究对于揭示人类性别决定的分子机制、胚胎发育的基因调控以及多种组织、器官的发生、发育过程和调控机制,以及解释临床多种畸形表型的发生机制等都具有十分重要的意义。展开更多
目的:探讨性反转综合征(sex reversal syndrome,SRS)的发病原因。方法:应用聚合酶链式反应(PCR)及PCR产物直接测序方法对22例性发育异常患者的人类性别决定区域(sex-determining region of Y chromosome,SRY)基因进行特异性扩增和序列...目的:探讨性反转综合征(sex reversal syndrome,SRS)的发病原因。方法:应用聚合酶链式反应(PCR)及PCR产物直接测序方法对22例性发育异常患者的人类性别决定区域(sex-determining region of Y chromosome,SRY)基因进行特异性扩增和序列检测分析。结果:在22例患者中有7例患者SRY基因检测结果与染色体性别不一致,其中3例为46,XX女性性反转患者的SRY基因为阳性(其中1例46,XX,Gp+),3例为46,XY男性性反转患者的SRY缺失,1例为45,X女性患者的SRY基因阳性;其他15例患者SRY基因与染色体性别一致,但都伴有不同程度的性发育异常,即存在Y染色体患者,SRY为阳性;无Y染色体的患者,SRY为阴性。通过对12例SRY阳性患者进行测序分析,均未发现碱基突变。结论:SRY基因的缺失或易位是导致SRS的最主要原因,同时也表明人类的性别决定和分化还有其他相关基因参与。展开更多
Anti-Mullerian hormone （amh） is one of the earliest functional genes expressed during testicular differentiation. It has been suggested that androgen signaling regulates critical genes for the differentiation and de...Anti-Mullerian hormone （amh） is one of the earliest functional genes expressed during testicular differentiation. It has been suggested that androgen signaling regulates critical genes for the differentiation and development of the testis. To elucidate the exact regulatory mechanisms involved in arnh transcription mediated by androgen signaling, androgen signaling was manipulated in zebrafish by cytochrome P450 17al （cyplTal） knockout and Flutamide treatment. In cyp17a1-deficient and Flutamide-treated testes, up-regulated sry-box9a （soxga） and down-regulated amh were observed. Moreover, a physical association of the zebrafish androgen receptor （AR） and SOX9A was found. The interaction between AR and SOX9A was mediated via the DNA binding domain （DBD） of AR and the transactivation domain （TA） of SOX9A, and was further enhanced by 5-alpha dihydrotestosterone （DHT）, one of the most potent androgens. Intriguingly, together with SOX9A, androgen signaling synergistically promoted amh transcription, mainly through the proximal 1 kb of the amh promoter region. Taken together, our data demonstrate a critical mechanism underlying the direct synergy of androgen signaling and SOX9A in the regulation of amh transcription.展开更多
基金supported by the National High Technology Research and Development Program of China (863 Program), No. 2015CB755400 (to XQH)
文摘Rhodioloside has been shown to protect cells from hypoxia injury,and bone marrow mesenchymal stem cells have a good effect on tissue repair.To study the effects of rhodioloside and bone marrow mesenchymal stem cells on spinal cord injury,a rat model of spinal cord injury was established using the Infinite Horizons method.After establishing the model,the rats were randomly divided into five groups.Rats in the control group were intragastrically injected with phosphate buffered saline(PBS)(5μL).PBS was injected at 6 equidistant points around 5 mm from the injury site and at a depth of 5 mm.Rats in the rhodioloside group were intragastrically injected with rhodioloside(5 g/kg)and intramuscularly injected with PBS.Rats in the mesenchymal stem cell(MSC)group were intramuscularly injected with PBS and intramuscularly with MSCs(8×10^6/mL in a 50-μL cell suspension).Rats in the Ad-HIF-MSC group were intragastrically injected with PBS and intramuscularly injected with HIF-1 adenovirus-infected MSCs.Rats in the rhodioloside+Ad-HIF-MSC group were intramuscularly injected with MSCs infected with the HIF-1 adenovirus and intragastrically injected with rhodioloside.One week after treatment,exercise recovery was evaluated with a modified combined behavioral score scale.Hematoxylin-eosin staining and Pischingert’s methylene blue staining were used to detect any histological or pathological changes in spinal cord tissue.Levels of adenovirus IX and Sry mRNA were detected by real-time quantitative polymerase chain reaction and used to determine the number of adenovirus and mesenchymal stem cells that were transfected into the spinal cord.Immunohistochemical staining was applied to detect HIF-1 protein levels in the spinal cord.The results showed that:(1)compared with the other groups,the rhodioloside+Ad-HIF-MSC group exhibited the highest combined behavioral score(P<0.05),the most recovered tissue,and the greatest number of neurons,as indicated by Pischingert’s methylene blue staining.(2)Compared with the PBS group,HIF-1 pro
文摘SOX家族是一类SRY(sex determination region of Ychomosome)相关基因构成的基因家族,编码一系列SOX(SRY-related HMG-box)家族的转录因子,参与胚胎发育和细胞命运(cell fate)决定的调控,所有成员的共同特点是均含有一个与SRY相关的HMG box同源的高度保守的HMG-box DNA结合域。SOX基因家族是进化过程中高度保守的一族基因,参与胚胎发育的转录调控,决定细胞的归宿,对多种组织器官的发育具有重要的作用,并参与人类性别的决定。因此,SOX家族基因的研究对于揭示人类性别决定的分子机制、胚胎发育的基因调控以及多种组织、器官的发生、发育过程和调控机制,以及解释临床多种畸形表型的发生机制等都具有十分重要的意义。
文摘目的:探讨性反转综合征(sex reversal syndrome,SRS)的发病原因。方法:应用聚合酶链式反应(PCR)及PCR产物直接测序方法对22例性发育异常患者的人类性别决定区域(sex-determining region of Y chromosome,SRY)基因进行特异性扩增和序列检测分析。结果:在22例患者中有7例患者SRY基因检测结果与染色体性别不一致,其中3例为46,XX女性性反转患者的SRY基因为阳性(其中1例46,XX,Gp+),3例为46,XY男性性反转患者的SRY缺失,1例为45,X女性患者的SRY基因阳性;其他15例患者SRY基因与染色体性别一致,但都伴有不同程度的性发育异常,即存在Y染色体患者,SRY为阳性;无Y染色体的患者,SRY为阴性。通过对12例SRY阳性患者进行测序分析,均未发现碱基突变。结论:SRY基因的缺失或易位是导致SRS的最主要原因,同时也表明人类的性别决定和分化还有其他相关基因参与。
基金supported by the National Natural Science Foundation of China (31501857 to G.Z.and 31530077 to Z.Y.)the National Basic Research Program of China (2014CB138602 to Z.Y.)
文摘Anti-Mullerian hormone （amh） is one of the earliest functional genes expressed during testicular differentiation. It has been suggested that androgen signaling regulates critical genes for the differentiation and development of the testis. To elucidate the exact regulatory mechanisms involved in arnh transcription mediated by androgen signaling, androgen signaling was manipulated in zebrafish by cytochrome P450 17al （cyplTal） knockout and Flutamide treatment. In cyp17a1-deficient and Flutamide-treated testes, up-regulated sry-box9a （soxga） and down-regulated amh were observed. Moreover, a physical association of the zebrafish androgen receptor （AR） and SOX9A was found. The interaction between AR and SOX9A was mediated via the DNA binding domain （DBD） of AR and the transactivation domain （TA） of SOX9A, and was further enhanced by 5-alpha dihydrotestosterone （DHT）, one of the most potent androgens. Intriguingly, together with SOX9A, androgen signaling synergistically promoted amh transcription, mainly through the proximal 1 kb of the amh promoter region. Taken together, our data demonstrate a critical mechanism underlying the direct synergy of androgen signaling and SOX9A in the regulation of amh transcription.
