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huojinlong8610: ½ð±Ò+888, ·­ÒëEPI+1, ¡ïÓаïÖú 2016-09-20 20:25:14
µ±Ç° Æ÷¹ÙÒÆÖ² ÖÎÁÆ ¼²²¡ ÃæÁÙµÄ ×î´óÎÊÌâÊÇ ¹©ÌåÆ÷¹Ù ÑÏÖØȱ·¦£¬Æ÷¹ÙË¥½ß»¼Õß ¶àÒò ÎÞ·¨ ¼°Ê±µÃµ½¹©ÌåÆ÷¹Ù ¶øËÀÍö¡£ÒìÖÖÆ÷¹ÙÒÆÖ² ÒѳÉΪ Ä¿Ç° ¿Æѧ½ç ºÍ ҽѧ½ç ¹«È쵀 ½â¾ö ¹©ÌåÆ÷¹Ù¶ÌȱµÄ ÓÐЧ;¾¶£¬Öí Òѱ»ÈÏΪ ÊÇ×îÊÊºÏµÄ ·ÇÁ鳤Àà ÒìÖÖÆ÷¹ÙÒÆÖ² ¹©Ìå¡£Öí¡úÈË ÒìÖÖÆ÷¹ÙÒÆÖ² µÄ Ö÷ÒªÆÁÕÏ ÊÇ ³¬¼±ÐÔÅųⷴӦ£¨HAR£©£¬¦Á1,3°ëÈéÌÇ£¨¦Á1,3Gal£©ÊÇ ÒýÆð HARµÄ Ö÷Òª¿¹Ô­£¬ÁÙ´²ÉÏ ½« Çå³ýÁ˦Á1,3 Gal µÄ ÖíÆ÷¹Ù ÒÆÖ²¸ø áôáô£¬ÈԻᷢÉú ÅųⷴӦ£¬Ìáʾ ÔÚ ÖíÌåÄÚ »¹´æÔÚ ÆäËû·Ç ¦Á1,3Gal ÒìÖÖ¿¹Ô­¡£ÎªÁËÔçÈÕ ÊµÏÖ Öí¡úÈËÒìÖÖÆ÷¹ÙÒÆÖ²µÄ ÁÙ´²Ó¦Ó㬹ã´óҽѧ ºÍ ¿ÆÑй¤×÷Õß °ÑÄ¿¹â תÏòÁË·Ç ¦Á1,3Gal »ùÒòµÄ ÍÚ¾ò ºÍ ¹¦ÄÜ Ñо¿¡£±¾ÊÔÑéÒÔ ¶ÀÌØµÄ ±»ÓþΪ Öí¡úÈËÒìÖÖÆ÷¹ÙÒÆÖ² Á¼ºÃ¹©Ìå µÄBMI Ϊ Ñо¿²ÄÁÏ£¬ÒÔÓë Öí¡úÈËÒìÖÖÆ÷¹ÙÒÆÖ² ÃâÒßÅųⷴӦ DZÔÚ Ïà¹ØµÄ CMAH¡¢OXSR1¡¢CD80¡¢ASGR1ºÍB4GALNT2 µÈ5¸ö ·Ç¦Á1,3Gal»ùÒò ΪºòÑ¡»ùÒò£¬´Ó·Ö×Ó¡¢µ°°×¡¢Ï¸°ûˮƽ ͬʱ ÈëÊÖ£¬ÑéÖ¤Õâ 5¸ö»ùÒò ÓëÖí¡úÈËÒìÖÖÆ÷¹ÙÒÆÖ² ÃâÒßÅų⠷´Ó¦µÄ Ïà¹ØÐÔ¡£
Currently, the most significant problem which is encountered by organ transplantation-based treatment of disease is the serious lack of donor organ, therefore most organ failure patients die from not obtaining donor organs timely. On this basis, xenotransplantation has become a well recognized method in scientific and medical community to solve the lack of donor organs, where pig has been regarded as the most suitable on human primate donor for xenotransplantation. The major technique barrier for pig¡úhuman xenotransplantation is the hyperacute rejection£¨HAR£©, in which ¦Á1,3 galactose£¨¦Á1,3Gal£©is the major antigen that causes HAR. In clinical practice, pig organs in which the ¦Á1,3 Gal have been removed, rejection action may still occur, indicating that there are still other heteroantigens other than ¦Á1,3Gal. To realize clinical application of pig¡úhuman
xenotransplantation, massive medical and scientific researchers turn to the exploration of non-¦Á1,3Gal gene  and research of related functions. In this experiment, the unique material BMI, known as an excellent donor for pig¡úhuman xenotransplantation, was selected as the researched material, and 5 non-¦Á1,3Gal genes that are related with pig¡úhuman xenotransplantation rejection reaction such as CMAH¡¢OXSR1¡¢CD80¡¢ASGR1 and B4GALNT were selected as candidate genes. The correlation between the 5 genes and pig¡úhuman xenotransplantation rejection reaction were verifed in the molecular, protein, and cellular level simultaneously.


Ê×ÏÈ ´ÓmRNAˮƽ·ÖÀë ²¢ »ñµÃ ÕâЩ »ùÒòµÄ ÍêÈ«±àÂëÇø ÐòÁÐÐÅÏ¢£¬²¢¶Ô ÕâЩ »ùÒò ½øÐÐ ÃâÒßÏà¹Ø ¶à×é֯ת¼±í´ïˮƽ µÄqPCR ¼ì²â·ÖÎö£¬»ñµÃ Æä ÔÚmRNAˮƽµÄ ±í´ïÇé¿ö£»È»ºó ²ÉÓÃWestern Blot·½·¨ ½øÒ»²½ ¶Ô Ïàͬ×éÖ¯ ½øÐÐÑéÖ¤£¬»ñµÃ ÆäÔÚ µ°°×ˮƽµÄ ±í´ïÇé¿ö£»¹¹½¨ Ä¿µÄ»ùÒò ºÍ ÂÌÉ«Ó«¹â±¨¸æ»ùÒò GFP µÄ Èںϱí´ïÔØÌ壬תȾʾ×Ù ½øÐРϸ°ûˮƽµÄ ÑéÖ¤£»²¢¶Ô Ïà¹Øµ°°×ÖÊ ½øÐÐ »ù±¾ÐÅÏ¢¡¢ÌØÕ÷ÐÅÏ¢¡¢½á¹¹Óò¡¢¹¦ÄÜλµã¡¢¸ß¼¶½á¹¹ µÈ¹¦ÄÜÉúÎïÐÅϢѧ ·ÖÎö¡£
First,mRNA-level separation was conducted to obtain the serial information of these genes in full coding region, qPCR detection analysis in the level of immuno-related multi-org transcription expression was applied to obtain the expression condition in mRNA level; secondly, Western Blot was adopted to further verify the same organs, so as to obtain the expression condition in protein level; the fusion expression vector for target gene and Green fluorescent protein reporter gene (GFP) was established for transfection tracing, so as to perform cellular level verification; moreover,  the functional biological information of related proteins were analyzed including basic information, characteristic information, structural domain, functional site, and higher-order structure.


½á¹û±íÃ÷ ÖíCMAH¡¢OXSR1¡¢CD80¡¢ASGR1 ºÍ B4GALNT2 »ùÒòµÄ È«³¤CDSÐòÁÐ ·Ö±ðΪ 1734 bp¡¢1590 bp¡¢894 bp¡¢861 bp¡¢1509 bp£¬²¢ Ìá½»µ½ GenBank »ñµÃÁË ÈÏÖ¤¡£qPCR·ÖÎö ºÍ Western BlotÑéÖ¤ ±íÃ÷CMAH mRNAÔÚ ò¢ÏÂÏÙ×éÖ¯ÖÐ ±í´ï ×î¸ß£»OXSR1 mRNAÔÚ ØºÍèÖÐ ±í´ï×î¸ß£»CD80 mRNAÔÚ Æ¢×éÖ¯ÖÐ ±í´ï×î¸ß£»ASGR1 mRNAÔÚ ¸ÎÔàÖÐ ÌØÒì±í´ï£¬ÔÚÆäËü×éÖ¯ÖÐ ²»±í´ï£»B4GALNT2 mRNAÔÚ ±âÌÒÌåÖÐ ±í´ï×î¸ß£»½Òʾ ͬһ»ùÒò ÔÚ²»Í¬×éÖ¯ ºÍ ²»Í¬»ùÒò ÔÚ Ïàͬ×éÖ¯ÖÐ ²îÒì±í´ï µÄÏÖÏó£¬Ò²ËµÃ÷ »ùÒò Ö÷ÒªÔÚ ÄÄЩ×éÖ¯ ·¢»Ó ÖØÒªµÄ¹¦ÄÜ£¬ÕâЩ ÖØÒª×éÖ¯ ½«ÊÇ ÎÒÃÇ ½øÒ»²½ Ñо¿ ¸Ã»ùÒò¹¦ÄÜ ÒÔ¼° ½øÐÐ »ùÒòÇóý ºÍ »ùÒòÐÞÊÎ Ñо¿µÄ °Ð×éÖ¯¡£¹¹½¨ÁË CMAH¡¢OXSR1¡¢CD80¡¢ASGR1ºÍB4GALNT2»ùÒò ºÍ ÂÌÉ«Ó«¹âµ°°×AcGFP1 ÕæºË Èںϱí´ïÔØÌå ²¢ ½«Æä תȾ ÖíÉöÉÏƤPK15ϸ°û ½øÐР˲ʱ±í´ï£¬¾ù ¼ì²âµ½ÁË ÂÌÉ«Ó«¹â±í´ï¡£ÔÚ´Ë»ù´¡ÉÏ ÎªÁË Ñо¿ ÕâЩ ÖíµÄ»ùÒò Óë ÈËÃâÒßÅųⷴӦµÄ Ïà¹ØÐÔ£¬½«ÕâЩ ÕæºËÈںϱí´ïÔØÌå תȾ ÈËÆê¾²ÂöÄÚƤϸ°ûHUVEC ½øÐÐ ±í´ï£¬¾ù¼ì²âµ½ÁË Îȶ¨±í´ïµÄ ÂÌÉ«Ó«¹â£¬±íÃ÷ CMAH¡¢OXSR1¡¢CD80¡¢ASGR1ºÍB4GALNT2»ùÒò Óë Öí¡úÈËÒìÖÖÆ÷¹ÙÃâÒßÅųⷴӦ Ïà¹Ø¡£Îª ÕâЩ »ùÒòÔÚ Öí¡úÈËÒìÖÖÒÆÖ²ÅÅ ³â·´Ó¦ÖÐ ·Ö×Ó»úÖÆ µÄ ²ûÃ÷µì¶¨ÁË »ù´¡¡£
Result showed that the full-length CDS sequences of pig CMAH, OXSR1, CD80, ASGR1 and B4GALNT2 genes were 1734 bp, 1590 bp, 894 bp, 861 bp, and 1509 bp, respectively. This result was submitted to GenBank and verification was realized. qPCR analysis and  Western Blot verification showed that CMAH mRNA achieved the highest expression in submandibular gland tissue; OXSR1 mRNA achieved the highest expression in testis£»CD80 mRNA achieved the highest expression in the tissue of
spleen£»ASGR1 mRNA achieved specific expression in liver, which achieved no expression in other tissues£»B4GALNT2 mRNA achieved the highest expression in tonsilla£»moreover it also revealed the phenomena of differential expression under
the conditions of the same gene in different tissues as well as different genes in the same tissue. It also showed the tissues in which these genes mainly exerted significant functions, which will be regarded as target tissues for gene function research and gene knockout and modification research. In this work, we established the eukaryotic fusion expression vectors for gene CMAH¡¢OXSR1¡¢CD80¡¢ASGR1, B4GALNT2 respectively and green fluorescent protein AcGFP1 and then transfected it
to pig kidney epithelial cell PK15 for transient expression, and green fluorescence expression was detected. On this basis, to research the correlation between these pig genes and human immunological rejection reaction, these eukaryotic fusion
expression vectors were transfected to human umbilical vein endothelial cell (HUVEC) for expression, and the stably expressed green fluorescence can be detected, indicating that the pig genes of CMAH, OXSR1, CD80, ASGR1 and B4GALNT2 are related with pig¡úhuman xenotransplantation rejection reaction. This experiment lays a foundation for illustrating the molecular mechanism in pig¡úhuman xenotransplantation rejection reaction.


ΪÉîÈëÁ˽⠻ùÒò±àÂëµÄ µ°°×Ö浀 Ïà¹Ø¹¦ÄÜÐÔÖÊ£¬ÎÒÃÇ ¶ÔÏàÓ¦µ°°×ÖÊ ½øÐÐÁË ¹¦ÄÜÉúÎïÐÅϢѧ·ÖÎö£¬°üÀ¨ ·ÖÎö Æä °±»ùËá×é³É¡¢·Ö×Óʽ¡¢·Ö×ÓÁ¿¡¢µÈµçµã¡¢Ïû¹âϵÊý¡¢°ëË¥ÆÚ¡¢Ô­×Ó×é³É¡¢²»Îȶ¨ÏµÊý¡¢Ö¬·¾Ö¸Êý¡¢Ç×ˮϵÊý µÈµ°°×ÖÊ »ù±¾ÐÅÏ¢£»ÊèË®ÐÔ¡¢¿çĤ½á¹¹¡¢¾íÇúÂÝÐý¡¢ÐźÅëÄ¡¢¹ÌÓÐÎÞÐòÐÔ¡¢ÁÁ°±Ëḻ¼¯µÄ ºËÊä³öÐźš¢ÑÇϸ°û¶¨Î» µÈ µ°°×ÖʵÄÌØÕ÷ÐÅÏ¢£»½á¹¹Óò ºÍ ¹¦ÄÜλµã£¨Á×ËữºÍÌÇ»ù»¯£©£»¶þ¼¶½á¹¹ ºÍ Èý¼¶½á¹¹µÈ¡£ÕâЩµ°°×Ö浀 »ù±¾ÐÅÏ¢¡¢ÌØÕ÷ÐÅÏ¢¡¢½á¹¹Óò¡¢¹¦ÄÜλµã ÒÔ¼° ¸ß¼¶½á¹¹µÄ ÉúÎïÐÅϢѧ·ÖÎö Ϊ CMAH¡¢OXSR1¡¢CD80¡¢ASGR1ºÍB4GALNT2 5¸ö µ°°×Ö浀 ½øÒ»²½ ¹¦ÄÜÑо¿ ºÍ ÑéÖ¤ ÌṩÁË ÀíÂÛÒÀ¾Ý£¬Ò²Îª ÏÂÒ»²½ ½øÐÐ Öí¡úÈËÒìÖÖÆ÷¹ÙÃâÒßÅųⷴӦ Ïà¹Ø»ùÒò µÄ ÁªºÏÇóý ºÍ »ùÒòÐÞÊÎ µì¶¨ÁË ÊµÑéºÍÁÙ´²ÊÔÑé »ù´¡¡£
In order to graso an in-depth knowledge on functional properties of gene encoding proteins, we analyzed the functional bioinformation of related proteins, including basic informations such as amino acid composition, molecular formula, molecular
weight, isoelectric point, extinction coefficient, half-life period, atomic composition, instability coefficient, fat index, and hydrophilic coefficient;  characteristic informations such as hydrophobicity, transmembrane structure, coiled coil, signal peptide, inherent disorder, leucine-rich nuclear export signal, and subcellular localization; structural domain and function site (phosphorylation and glycosylation); secondary structure and tertiary structure. All these information provide theoretical basis for further functional research and verification of 5 proteins of CMAH, OXSR1, CD80, ASGR1 and B4GALNT2, and also lay foundation for clinical trails of gene knockout and modification related to pig¡úhuman xenotransplantation rejection reactiono in the next stage.


±¾Ñо¿ Ìî²¹ÁË CMAH¡¢OXSR1¡¢CD80¡¢ASGR1ºÍB4GALNT2»ùÒòÔÚ Öí¡úÈËÒìÖÖÆ÷¹ÙÒÆÖ² ·Ç³¬¼±ÐÔÅųⷴӦ ¦Á1,3Gal»ùÒòÑо¿ Ö®ÍâµÄ ¿Õ°×£¬±¾Ñо¿½á¹û ²»½ö¿ÉΪ BMI Öí¡úÈËÒìÖÖÆ÷¹ÙÒÆÖ² ÀûÓà Ìṩ »ù´¡Êý¾Ý×ÊÁÏ£¬Í¬Ê±Îª ´Ù½øÆä ¿ª·¢ºÍÀûÓà Ìṩ ¿ÆѧÒÀ¾Ý£¬Ò²¿ÉÒÔΪ Öí¡úÈËÒìÖÖÆ÷¹Ù µÄÔçÈÕʵÏÖ µì¶¨ÀíÂÛ ºÍ ʵÑé»ù´¡¡£
This research fills the blank research area on the correlation between 5 pig genes (CMAH, OXSR1, CD80, ASGR1 and B4GALNT2, other than ¦Á1,3Gal gene) and pig¡úhuman xenotransplantation non-hyperacute rejection reaction. The research results not only provide basic data material for the application of BMI in pig¡úhuman xenotransplantation, but also provides scientific basis for the development and utilization of BMI, more importantly lays theoretical and experimental basis for early realization of pig¡úhuman xenotransplantation.
2Â¥2016-09-19 19:14:52
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