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Objective: To test droplet digital PCR for species identification and absolute quantification of biological sample.
Methods: Specific primers and probes for human mtDNA encoding gene ND4 and 16S rRNA were designed, and the species-specificity was assessed on DNA samples derived from human and common animals. To determine the sensitivity and stability of droplet digital PCR for species identification and absolute quantification, gradient dilution series of recombinant plasmid and 16 human DNA samples were analyzed.
Results: Human recombinant plasmid FAM (ND4) could be used in detecting the samples of human. And the results of detecting were consistent with all levels of diluted concentrations. Droplet digital PCR was able to detect low and single copy of target DNA.
Conclusion: Droplet digital PCR, with high sensitivity and specificity, is fully amenable for species identification and absolute quantification of biological samples, also it can be applied on routine forensic examination.
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Turk J Pediatr
September 2025
Department of Pediatric Hematology and Oncology, the Affiliated Hospital of Qingdao University, Qingdao, Shandong, China.
Background: The expression and clinical correlation of BRAFV600E mutation and programmed cell death-1 ligand 1 (PD-L1) in children with Langerhans cell histiocytosis (LCH) have been reported, but the conclusions of previous studies are inconsistent. In addition, it has been reported that elevated cathepsin S (CTSS) expression is associated with various cancers. However, there is currently no research on the correlation between CTSS and LCH.
View Article and Find Full Text PDFFood Res Int
November 2025
Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy. Electronic address:
Fish is one of the most common causes of food allergy. The global prevalence of fish allergy has increased over the years as a result of the increased fish consumption. In allergic individuals even small amounts of allergen can trigger a life-threatening allergic reaction.
View Article and Find Full Text PDFFront Immunol
September 2025
Division of Rheumatology, Department of Medicine, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China.
Background: Regulatory T cells (Tregs) are found to be critical for maintaining immune tolerance to self-antigens; however, their status in primary Sjögren's syndrome (pSS) remains unclear. We investigated alterations in the abundance of peripheral Tregs in a large pSS cohort and their implications for patients.
Methods: Levels of CD4+CD25+FOXP3+Treg cells in the peripheral blood of 624 patients with pSS, and 93 healthy controls (HCs) were detected using modified flow cytometry (FCM).
Pract Lab Med
September 2025
Department of Clinical Laboratory, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China.
Background: Nucleic Acid Amplification Tests (NAAT) remain one of the most reliable methods for pathogen identification. Given the high false-negative rates associated with traditional staining and microscopic examination, the time-consuming nature and low sensitivity of bacterial culture methods, as well as the inability of conventional NAAT to achieve absolute quantification.
Methods: To achieve rapid and quantitative detection of , we selected the 23S rRNA gene as the target for identification and developed a droplet digital PCR detection method.
Clin Transplant Res
September 2025
Department of Laboratory Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
Donor-derived cell-free DNA (dd-cfDNA) has emerged as a valuable noninvasive biomarker for detecting allograft injury in solid organ transplantation. It is released into the bloodstream from the transplanted organ as a result of cell injury and immune activation, with baseline levels influenced by organ type, tissue turnover, and posttransplant physiological changes. Several analytical platforms are available, including quantitative polymerase chain reaction (PCR), digital droplet PCR, and next-generation sequencing, each differing in sensitivity, throughput, and reporting format.
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