Pan-cancer analysis of HS6ST2: associations with prognosis, tumor immunity, and drug resistance.

OBJECTIVES: In this comprehensive study spanning 33 malignancies, we explored the differential expression and prognostic significance of Heparan sulfate 6-O-sulfotransferase 2 (HS6ST2). METHODS: TIMER2, UALCAN, and GEPIA2 were used for the expression analysis. cBioPortal was used for mutational analysis. CancerSEA, STRING, and DAVID, were employed for the single cell sequencing data analysis, protein-protein interaction network development, and gene enrichment analyses, respectively. GSCAlite and RT-qPCR were used for drug sensitivity and expression validation analysis. RESULTS: HS6ST2 exhibited significant (P < 0.05) overexpression in multiple cancers. Prognostically, elevated HS6ST2 expression was significantly associated with poor overall survival (OS) in patients with cervical squamous cell carcinoma (CESC), kidney chromophobe (KICH), lung adenocarcinoma (LUAD), and stomach adenocarcinoma (STAD), emphasizing its potential as a prognostic indicator in these cancers. Moreover, HS6ST2 expression correlated with pathological stages in CESC, KICH, LUAD, and STAD patients. Exploration of genetic alterations using cBioPortal unveiled distinct mutational landscapes, with low mutation frequencies in CESC, KICH, LUAD, and STAD. Additionally, reduced DNA methylation in CESC, KICH, LUAD, and STAD suggested a potential link between hypomethylation and heightened HS6ST2 expression. Analysis of immune cell infiltration revealed a positive correlation between HS6ST2 expression and the infiltration of CD8+ T and CD4+ T cells in CESC, KICH, LUAD, and STAD, highlighting its involvement in the tumor immunology processes. Single-cell functional states analysis demonstrated associations between HS6ST2 and diverse cellular processes. Moreover, gene enrichment analysis revealed the involvement HS6ST2 in crucial cellular activities. GSCAlite analysis underscored the potential of HS6ST2 as a therapeutic target, showing associations with drug sensitivity. Finally, experimental validation through reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and immunohistochemistry in LUAD tissues confirmed elevated HS6ST2 expression. CONCLUSION: Overall, this study provides a comprehensive understanding of HS6ST2 in CESC, KICH, LUAD, and STAD, emphasizing its potential as a prognostic biomarker and therapeutic target.

Road traffic accidents as a major contributor to neurosurgical mortality in adults.

OBJECTIVE: To assess the contribution of Road Traffic Accidents (RTAs) to neurosurgical mortality in adults. DESIGN: It was a descriptive study. PLACE AND DURATION OF STUDY: The study was carried out at Pakistan Institute of Medical Sciences (PIMS), Islamabad. from June, 1998 to June, 2002. PATIENTS AND METHODS The clinical records including radiological records and death certificates were studied. Absolute and relative frequencies of neurosurgical mortality were noted. Mean age and male to female ratio of the patients who died due to RTAs were also determined. RESULTS: There were 315 post-traumatic deaths. RTAs contributed to 281 deaths while head injury was the cause of death in 268 patients. A significant number of patients died below the age of 40 years (63%) and male to female ratio was 6.8:1 secondary to RTAs. CONCLUSION: RTAs are a major contributor to neurosurgical mortality especially in adults. RTAs are one of the preventable causes of neurosurgical deaths.