Severity: Warning
Message: file_get_contents(https://...@gmail.com&api_key=61f08fa0b96a73de8c900d749fcb997acc09): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
Filename: helpers/my_audit_helper.php
Line Number: 143
Backtrace:
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 143
Function: file_get_contents
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 209
Function: simplexml_load_file_from_url
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3098
Function: getPubMedXML
File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global
File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword
File: /var/www/html/index.php
Line: 316
Function: require_once
Severity: Warning
Message: Attempt to read property "Count" on bool
Filename: helpers/my_audit_helper.php
Line Number: 3100
Backtrace:
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3100
Function: _error_handler
File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global
File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword
File: /var/www/html/index.php
Line: 316
Function: require_once
Epigenetic modifications, including DNA methylation and histone modifications, are involved in regulation of gene expression, and alterations in these modifications are implicated in cancer onset and progression. The specific pattern of DNA methylation depends on the balance between methylation and demethylation processes. Recent studies have shown that TET proteins play a key role in DNA demethylation. TET proteins (TET1, TET2, TET3) are iron(II) and α-ketoglutarate dependent dioxygenases, and their enzymatic activity involves hydroxylation of 5-methylcytosine to 5-hydroxymethylcytosine and further to 5-formylcytosine and 5-carboxylcytosine. These modified cytosines are removed by enzymes involved in DNA repair. However, the role of TETs in gene expression regulation is not limited to their catalytic activity. TETs can interact with proteins of complexes involved in the modification of histones (i.e. EZH2, OGT, Sin3a or HCF1) and by affecting their activity and, chromatin binding ability, they can cause changes in patterns of histone methylation, acetylation and O-GlcNAcylation. There is growing evidence that decreased expression of TET proteins and mutation in TET genes are associated with cancer onset and progression.
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Source |
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http://dx.doi.org/10.5604/17322693.1186346 | DOI Listing |
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