成年大鼠附睾蛋白酶抑制剂的定位及其出生后发育进程中睾丸转录水平的研究

The Beige and Chediak-Higashi (BEACH) domain is highly conserved in a large family of eukaryotic proteins, and is crucial for their functions in vesicle trafficking, membrane dynamics and receptor signaling. From a fetal brain cDNA library, we isolated a cDNA of 3858 bp encoding a novel human BEACH protein, which was named as human neurobeachin-like 1 (NBEAL1) gene. The cDNA had an open reading frame (ORF) of 3006 bp encoding a putative 1001 amino acid protein. The NBEAL1 gene was located on human chromosome 2q33-2q34 and consisted of 25 exons spanning about 73 kb of the human genome. PSORT analysis indicated that the NBEAL1 protein contained a vacuolar-targeting motif ILPK, which suggested the protein might be located in the cell lysosome. The expression pattern was examined by reverse transcription/polymerase chain reaction (RT-PCR), which showed that the transcripts were highly expressed in the human brain, kidney, prostate, and testis while lowly in the ovary, small intestine, colon and peripheral blood leukocyte. In addition, the RT-PCR result of and Northern blot showed that the novel gene was highly expressed in the biopsies of different grade glioma, especially in that of lower grade ones, which suggested it might be correlative with the glioma.

抗菌肽LL-37、HBD-2和HBD-3在皮肤结核皮损中的表达

目的 研究抗菌肽LL-37、人β防御素-2(HBD-2)、HBD-3在寻常狼疮和疣状皮肤结核皮损中的表达,探讨皮肤结核的发病机制.方法 免疫组化方法检测LL-37、HBD-2、HBD-3在18例寻常狼疮和疣状皮肤结核患者皮损、15例银屑病患者皮损以及10例健康人皮肤石蜡切片中的表达.SPSS13.0统计软件进行数据分析,组间行t检验.结果 LL-37、HBD-2在皮肤结核皮损中主要表达于表皮中上层、附属器及血管壁,与正常皮肤比较为高表达(t=2.632,2.399,P值均＜0.05),且与银屑病的表达模式类似.HBD-3在皮肤结核皮损中未见表达,而在银屑病皮损及正常皮肤中均可见表达.结论 抗菌肽LL-37和HBD-2可能参与皮肤结核的免疫反应过程,而HBD-3在皮肤结核的表达缺失可能与其发病密切相关.

AIM:To explore whether YAP protein is important in induced pluripotent stem cell ( iPSC)-induced cardiovascular progenitor cell and/or vascular smooth muscle differentiation .METHODS:Using episomal vector based reprogramming , we generated human iPSCs from donor fibroblasts .We used both this iPSCs and human H 1 embryonic stem cells to differentiate into vascular smooth muscle cells (VSMCs) through cardiovascular progenitor cells (CVPC).Western blotting, qPCR and immunofluorescence microscopy were used to check the expression of YAP and related genes during this differentiation process .RESULTS:The results showed that iPSCs expressed pluripotent stem cell markers, such as Oct4, Nanog, Sox2, TRA-1-60 and SSEA3, and could form teratoma in SCID mice.YAP was highly expressed in pluripotent stem cells , but dramatically decreased when CVPC differentiation started .YAP gradually increased dur-ing CVPC three-day differentiation.The TAZ and YAP binding partner TEAD1, but not TEAD2 and TEAD4, have similar expression pattern in CVPC differentiation .Immunofluorescence result confirmed that YAP was activated and accumulated in nucleus .Interesting-ly, both YAP and phosphorylated YAP expression decreased to very low level after CVPC differentiated into VSMCs in 7 days.TEAD4 and TAZ also decreased, while TEAD1, TEAD2 and TEAD3 expression did not change during VSMC differentiation .CONCLU-SION:YAP and TEAD1 expression increased during CVPC differentiation , while YAP and TEAD4 expression decreased from CVPC to VSMCs differentiation , which suggested YAP might have different function during diverse cell differentiation .