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Colibacillosis, a bacterial disease caused by avian pathogenic E. coli (APEC), is a prevalent condition in the poultry industry, resulting in substantial economic losses annually. Previously, we identified PTEN as a crucial candidate gene that may play a significant role in chicken's immune response to APEC infection. Bioinformatics analysis indicated that the PTEN protein was unstable, hydrophilic and nuclear localization, with multiple putative phosphorylation sites and a high degree of similarity to duck and goose PTEN. Moreover, PTEN exhibited high expression levels in various tissues such as the stomach, cecum, small intestine, spleen, thymus, harderian gland, muscle, cerebrum, cerebellum, lung, and liver in comparison to heart tissue. Overexpression of PTEN resulted in a significant promotion of the expression level of pro-apoptosis genes and inflammatory mediators, as well as the production of NO, with or without APEC infection, which led to cellular injury. Furthermore, overexpression of PTEN was found to regulate the expression levels of autophagy related genes, regardless of APEC infection. Additionally, PTEN was a target gene of gga-miR-20a-5p and regulated by gga-miR-20a-5p upon APEC infection. Taken together, these findings establish a foundation for investigating the biological function of chicken PTEN , providing a potential target for future treatments against APEC infection as well as the breeding of genetically resistant poultry. [ABSTRACT FROM AUTHOR]

Background & Aims: No approved therapy is available for patients with advanced hepatocellular carcinoma (HCC) who fail first-line therapy. The prognosis of these patients, especially those eligible for clinical trials of second-line therapy, is unclear. Methods: All patients who participated in clinical trials of first-line systemic therapy for metastatic or locally advanced HCC in a referral center of Taiwan between 2005 and 2011 were included. Their clinicopathologic characteristics, when the first-line treatment failed, were analyzed and correlated with the overall survival (OS) from the date of first-line treatment failure. Results: A total of 192 patients were included. Before the start of the first-line therapy, all patients had Child-Pugh class A liver reserves and Cancer of the Liver Italian Program (CLIP) scores ⩽4. After the failure of the first-line therapy, the median OS of the entire group was 4.0months. Patients with Child-Pugh class A liver reserves, when the first-line treatment failed, had significantly better OS than patients with Child-Pugh class B or C liver reserves (median, A vs. B vs. C=7.5 vs. 1.3 vs. 1.0month, p <0.001). According to the key eligibility criteria of 3 published clinical trials for second-line therapy, 41%–56% of patients were potentially eligible. Compared to patients who were ineligible for clinical trials, potentially eligible patients had longer OS with a median of 7.8–8.6months. Conclusions: Patients with advanced HCC who failed first-line therapy could have substantially improved prognosis if they had Child-Pugh A liver reserves or were potentially eligible for clinical trials. [Copyright &y& Elsevier]