Author Archives: Poorintra Sakuna

Abstract We developed a robust LC–MS/MS method for the simultaneous quantification of 16 uremic toxins (UTs) and 14 bile acids (BAs) in plasma and fecal samples within a single method. The method demonstrated high sensitivity, broad metabolite coverage, and excellent accuracy, precision, and throughput. Using this platform, targeted metabolites were quantified in peritoneal dialysis (PD) […]

Abstract Lung cancer remains the leading cause of cancer-related mortality worldwide, underscoring the urgent need for non-invasive approaches to improve diagnosis, patient stratification, and therapeutic monitoring. Metabolic reprogramming driven by oncogenic alterations-particularly Epidermal Growth Factor Receptor (EGFR) mutations in non-small cell lung cancer (NSCLC)-creates distinctive plasma signatures with clinical relevance. In this study, plasma metabolomic […]

Abstract Droplet-based single-cell RNA sequencing (scRNA-seq) frequently encounters significant challenges from contamination of cell-free mRNAs, known as “ambient mRNAs”, which can substantially distort single-cell transcriptome data interpretation to a large extent. In this study, we investigate the impact of ambient mRNA contamination on differential gene expression and biological pathway enrichment analyses, using two independent scRNA-seq […]

Abstract Background: Thiamin deficiency (TD) manifesting clinically as wet beriberi can significantly impair a patient’s cardiac function. Children with heart disease who are receiving diuretic treatment may be at increased risk for severe clinical manifestations of TD. Purpose: This study aimed to determine the prevalence of TD and evaluate the association between various factors with […]

Abstract Bacteriophage endolysins are attractive alternatives to antibiotics owing to their rapid action, host specificity, and unlikeliness of resistance development. Here, bioinformatic analysis of Streptococcus suis prophage sequences identified an endolysin, named PlyCYU, containing two putative catalytic domains-an N-terminal amidase_5 and a C-terminal glucosaminidase (Lyz2) domain-with two CW_7 family cell wall binding motifs. PlyCYU exhibited […]

Abstract Objective: Induced pluripotent stem cells (iPSCs) are generated from a vast number of adult cell types. While they all acquired embryonic stem cell (ESC)-like properties during reprogramming, differences in certain characteristics, including differentiation potential, remained. These differences are hypothesized to be due to epigenetic memory or individual genetic background. Results: This study compared microRNA […]

Abstract This study presents the development and validation of a liquid chromatography-quadrupole-time-of-flight mass spectrometry method with data-independent acquisition (LC-QTOF-MSE) for targeted quantification, post-targeted screening, and untargeted metabolite profiling. Using MS1-based precursor ion quantification, the method demonstrated excellent analytical performance with linearity (R² > 0.99), accuracy (84 %-131 %), and precision (1 %-17 % relative standard […]

Abstract The polyhistidine (His) tag is one of the most widely used tags for protein expression, detection, and purification. Aptamers targeting the His tag have been developed for various applications, including western blotting, flow cytometry, immunohistochemistry, and immunoprecipitation, due to their advantages over His-tag antibodies. However, previously reported His-tag aptamers are either DNA or unmodified […]

Abstract Metformin has been demonstrated to extend lifespan in various model organisms, and its molecular effects are observed in the cytoplasm and multiple organelles, including mitochondria. However, its association with the unfolded protein response (UPR) and its impact on stress resistance and locomotion remain uncertain. In this study, metformin was found to exert differential influences […]

Abstract Background: Patients with chronic kidney disease (CKD) stage 5D receiving peritoneal dialysis (PD) are at risk for thiamin deficiency (TD). This study compared the proportion of TD in pediatric CKD patients undergoing PD with that in healthy controls and evaluated the associations of various factors with TD in CKD patients. Methods: Thirty-two patients with […]