Severity: Warning
Message: file_get_contents(https://...@pubfacts.com&api_key=b8daa3ad693db53b1410957c26c9a51b4908&a=1): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
Filename: helpers/my_audit_helper.php
Line Number: 176
Backtrace:
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 176
Function: file_get_contents
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 250
Function: simplexml_load_file_from_url
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3122
Function: getPubMedXML
File: /var/www/html/application/controllers/Detail.php
Line: 575
Function: pubMedSearch_Global
File: /var/www/html/application/controllers/Detail.php
Line: 489
Function: pubMedGetRelatedKeyword
File: /var/www/html/index.php
Line: 316
Function: require_once
Background Aims: Because of their multilineage differentiation capacity, immunomodulatory role and homing ability, mesenchymal stromal cells (MSC) are emerging as a new therapeutic strategy for treating a variety of disorders. Although bone marrow (BM) is the best characterized source of MSC, Wharton's jelly (WJ) of the umbilical cord holds great promise as an alternative. As delivery direct to the site of injury is not always feasible, efficient homing of MSC to the site of injury is critical for inducing tissue repair and regeneration. MSC express a wide variety of growth factors, chemokines and receptors that are important for cell migration, homing and re-establishment of blood supply for recovery of damaged tissues.
Methods: Detailed chemokine and receptor gene expression profiles of WJ MSC were established, and subsequently compared with those of BM-derived MSC using a polymerase chain reaction (PCR) array. Secretion of growth factors was analyzed and evaluated using culture supernatant from WJ and BM MSC.
Results: Our results revealed a differential expression pattern of the chemokines and their receptors between WJ- and BM-derived MSC. Several Glutamic acid-Leucine-Arginine; ELR-positive CXC chemokine genes and secretion of growth factors, which promote angiogenesis, were found to be up-regulated in WJ MSC.
Conclusions: To understand better the localization and mechanism of tissue repair by transplanted WJ MSC, we attempted chemokine and their receptor transcription profiling, followed by analysis of growth factors secreted by WJ MSC, and compared them against those of BM MSC. The data suggest that MSC from different sources can be explored for distinct therapeutic roles.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.3109/14653249.2011.605119 | DOI Listing |
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!