Purpose: Breast cancer (BC) is a predominant malignancy globally, surpassing lung cancer in terms of diagnostic frequency, with an escalating incidence rate in recent decades.Recent studies have investigated the role of protein kinase C zeta (PRKCZ) in diverse cellular processes in cancer biology. In this study, we evaluated the association between PRKCZ and deleterious outcomes in BC and elucidated the mechanisms underlying its expression in breast carcinoma. Methods: The correlation between PRKCZ and survival rates of patients with BC was investigated using The Cancer Genome Atlas database. The methylation status of the PRKCZ promoter was analyzed using the UALCAN database. Furthermore, we investigated the mechanisms underlying PRKCZ inactivation in BC by treatment with transferase inhibitors, methylation-specific polymerase chain reaction (PCR) analysis, western blotting, and luciferase reporter gene assays. The degree of methylation and expression levels of PRKCZ, as regulated by DNA methyltransferase 1 (DNMT1), were quantified using quantitative PCR and western blotting. Results: Our analysis revealed that decreased expression of PRKCZ in BC was significantly correlated with poor clinical prognosis. Furthermore, we observed that hypermethylation of the PRKCZ promoter contributed to its reduced expression in BC. Notably, DNMT1 has been identified as a critical regulator of PRKCZ methylation. Conclusion Our findings elucidate the tumor-suppressive function of PRKCZ and provide insights into the molecular mechanisms underlying its downregulation in BC.

Purpose: Breast cancer (BC) is a predominant malignancy globally, surpassing lung cancer in terms of diagnostic frequency, with an escalating incidence rate in recent decades.Recent studies have investigated the role of protein kinase C zeta (PRKCZ) in diverse cellular processes in cancer biology. In this study, we evaluated the association between PRKCZ and deleterious outcomes in BC and elucidated the mechanisms underlying its expression in breast carcinoma. Methods: The correlation between PRKCZ and survival rates of patients with BC was investigated using The Cancer Genome Atlas database. The methylation status of the PRKCZ promoter was analyzed using the UALCAN database. Furthermore, we investigated the mechanisms underlying PRKCZ inactivation in BC by treatment with transferase inhibitors, methylation-specific polymerase chain reaction (PCR) analysis, western blotting, and luciferase reporter gene assays. The degree of methylation and expression levels of PRKCZ, as regulated by DNA methyltransferase 1 (DNMT1), were quantified using quantitative PCR and western blotting. Results: Our analysis revealed that decreased expression of PRKCZ in BC was significantly correlated with poor clinical prognosis. Furthermore, we observed that hypermethylation of the PRKCZ promoter contributed to its reduced expression in BC. Notably, DNMT1 has been identified as a critical regulator of PRKCZ methylation. Conclusion Our findings elucidate the tumor-suppressive function of PRKCZ and provide insights into the molecular mechanisms underlying its downregulation in BC.

Purpose: Breast cancer (BC) is a predominant malignancy globally, surpassing lung cancer in terms of diagnostic frequency, with an escalating incidence rate in recent decades.Recent studies have investigated the role of protein kinase C zeta (PRKCZ) in diverse cellular processes in cancer biology. In this study, we evaluated the association between PRKCZ and deleterious outcomes in BC and elucidated the mechanisms underlying its expression in breast carcinoma. Methods: The correlation between PRKCZ and survival rates of patients with BC was investigated using The Cancer Genome Atlas database. The methylation status of the PRKCZ promoter was analyzed using the UALCAN database. Furthermore, we investigated the mechanisms underlying PRKCZ inactivation in BC by treatment with transferase inhibitors, methylation-specific polymerase chain reaction (PCR) analysis, western blotting, and luciferase reporter gene assays. The degree of methylation and expression levels of PRKCZ, as regulated by DNA methyltransferase 1 (DNMT1), were quantified using quantitative PCR and western blotting. Results: Our analysis revealed that decreased expression of PRKCZ in BC was significantly correlated with poor clinical prognosis. Furthermore, we observed that hypermethylation of the PRKCZ promoter contributed to its reduced expression in BC. Notably, DNMT1 has been identified as a critical regulator of PRKCZ methylation. Conclusion Our findings elucidate the tumor-suppressive function of PRKCZ and provide insights into the molecular mechanisms underlying its downregulation in BC.

OBJECTIVES: To evaluate the early clinical efficacy and safety of trans-catheter aortic valve replacement (TAVR) for patients with severe pure native aortic regurgitation (PNAR) who are not suitable for conventional surgical aortic valve replace-ment. METHODS: A retrospective analysis was conducted on 48 patients with PNAR who underwent TAVR at the Department of Cardiac Surgery, the First Affiliated Hospital of Sun Yat-sen University between March 2019 and February 2025. These included 25 cases with transfemoral approach (TF-TAVR group) and 23 cases with transapical approach (TA-TAVR group). Efficacy and safety were assessed by analyzing baseline characteristics, all-cause mortality, and procedure-related complications. RESULTS: Compared with the TA-TAVR group, the TF-TAVR group exhibited significantly smaller aortic annulus circumference and diameter, left ventricular outflow tract circumference and diameter, diameters of the left, right, and non-coronary sinuses, and sinotubular junction (STJ) diameter, along with a shorter distance from the STJ to the aortic annular plane ring plane, a smaller annulus angle (all P<0.05). Additionally, the TF-TAVR group showed a deeper prosthesis implantation depth relative to the aortic annular plane (P<0.01). The overall technical success rate was 91.67%, and the device success rate was 83.33%. Post-TAVR, both groups demonstrated significant improvement in left ventricular end-diastolic diameter (both P<0.05), while only the TA-TAVR group showed significant reduction in left ventricular end-systolic diameter (P<0.05). For primary outcomes, in-hospital mortality occurred in 2 patients (4.17%). No additional deaths were reported at 60 or 90 d after surgery. During 90-180 d after surgery, one patient in the TF-TAVR group died of sudden cardiac death, and one in the TA-TAVR group died of gastroin-testinal bleeding. During 180 d-1 year after surgery, one patient in the TF-TAVR group died of low cardiac output syndrome. No statistically significant differences were observed in 1-year Kaplan-Meier survival curves between the two groups (P>0.05). No conduction block events occurred in TA-TAVR group during hospitalization or 1-year follow-up, while high-grade atrioventricular block, left bundle branch block, permanent pacemaker implantation occurred in TF-TAVR group during hospitalization (12.00%, 4.00%, and 12.00%, respectively). CONCLUSIONS TAVR demonstrates high feasibility and acceptable safety for severe PNAR patients who are not suitable for conventional SAVR. Both TF-TAVR and TA-TAVR show comparable early postoperative efficacy and safety profiles.
Humans ; Transcatheter Aortic Valve Replacement/adverse effects* ; Aortic Valve Insufficiency/surgery* ; Retrospective Studies ; Male ; Female ; Aged ; Treatment Outcome ; Aortic Valve/surgery* ; Aged, 80 and over ; Heart Valve Prosthesis

Nowadays,the one hospital with multiple districts has become a common model for the development of large public hospitals at present.Through the analysis of the common problems in the development of one hospital with multiple districts,the homogeneous management of one hospital with multiple districts has practical problems,it reflected in difficulties in space management,difficulties,difficulties in staff management,difficulties in system management,difficulties in collaborative development of medical service,difficulties in assessment,difficulties in cost management,difficulties in culture integrations.The case of the scientific management of one hospital with multiple districts in a tertiary public hospitals of provincial state-owned is analyzed,the experience are summarized in terms of organizational structure level,development orientation level,personnel level,performance pay level,cost control level,basic facilities level,culture level,to expected to provide references for promoting the construction of one hospital with multiple districts in public hospitals.

Nowadays,the one hospital with multiple districts has become a common model for the development of large public hospitals at present.Through the analysis of the common problems in the development of one hospital with multiple districts,the homogeneous management of one hospital with multiple districts has practical problems,it reflected in difficulties in space management,difficulties,difficulties in staff management,difficulties in system management,difficulties in collaborative development of medical service,difficulties in assessment,difficulties in cost management,difficulties in culture integrations.The case of the scientific management of one hospital with multiple districts in a tertiary public hospitals of provincial state-owned is analyzed,the experience are summarized in terms of organizational structure level,development orientation level,personnel level,performance pay level,cost control level,basic facilities level,culture level,to expected to provide references for promoting the construction of one hospital with multiple districts in public hospitals.

Nowadays,the one hospital with multiple districts has become a common model for the development of large public hospitals at present.Through the analysis of the common problems in the development of one hospital with multiple districts,the homogeneous management of one hospital with multiple districts has practical problems,it reflected in difficulties in space management,difficulties,difficulties in staff management,difficulties in system management,difficulties in collaborative development of medical service,difficulties in assessment,difficulties in cost management,difficulties in culture integrations.The case of the scientific management of one hospital with multiple districts in a tertiary public hospitals of provincial state-owned is analyzed,the experience are summarized in terms of organizational structure level,development orientation level,personnel level,performance pay level,cost control level,basic facilities level,culture level,to expected to provide references for promoting the construction of one hospital with multiple districts in public hospitals.

Nowadays,the one hospital with multiple districts has become a common model for the development of large public hospitals at present.Through the analysis of the common problems in the development of one hospital with multiple districts,the homogeneous management of one hospital with multiple districts has practical problems,it reflected in difficulties in space management,difficulties,difficulties in staff management,difficulties in system management,difficulties in collaborative development of medical service,difficulties in assessment,difficulties in cost management,difficulties in culture integrations.The case of the scientific management of one hospital with multiple districts in a tertiary public hospitals of provincial state-owned is analyzed,the experience are summarized in terms of organizational structure level,development orientation level,personnel level,performance pay level,cost control level,basic facilities level,culture level,to expected to provide references for promoting the construction of one hospital with multiple districts in public hospitals.

Nowadays,the one hospital with multiple districts has become a common model for the development of large public hospitals at present.Through the analysis of the common problems in the development of one hospital with multiple districts,the homogeneous management of one hospital with multiple districts has practical problems,it reflected in difficulties in space management,difficulties,difficulties in staff management,difficulties in system management,difficulties in collaborative development of medical service,difficulties in assessment,difficulties in cost management,difficulties in culture integrations.The case of the scientific management of one hospital with multiple districts in a tertiary public hospitals of provincial state-owned is analyzed,the experience are summarized in terms of organizational structure level,development orientation level,personnel level,performance pay level,cost control level,basic facilities level,culture level,to expected to provide references for promoting the construction of one hospital with multiple districts in public hospitals.

Nowadays,the one hospital with multiple districts has become a common model for the development of large public hospitals at present.Through the analysis of the common problems in the development of one hospital with multiple districts,the homogeneous management of one hospital with multiple districts has practical problems,it reflected in difficulties in space management,difficulties,difficulties in staff management,difficulties in system management,difficulties in collaborative development of medical service,difficulties in assessment,difficulties in cost management,difficulties in culture integrations.The case of the scientific management of one hospital with multiple districts in a tertiary public hospitals of provincial state-owned is analyzed,the experience are summarized in terms of organizational structure level,development orientation level,personnel level,performance pay level,cost control level,basic facilities level,culture level,to expected to provide references for promoting the construction of one hospital with multiple districts in public hospitals.