Leukocyte differential count is one of the most frequently ordered clinical tests in hospitals. This paper reports a point-of-care test for the leukocyte count by using a microflow cytometer and a fluorescent dye assay. The dye assay relied on fluorescent detection alone to count leukocytes in blood and to identify leukocyte subtypes. By combining the fluorescent assay with a sheathless microflow design, the proposed method achieved a minimal sample volume by eliminating excessive dilution and sheath flow. In this paper, a four-part leukocyte differential count including lymphocyte, monocyte, neutrophil and eosinophil was demonstrated, and the whole test consumed only a small amount of blood (5 μL) and reagents (68 μL in total). The merits of minimal sample volume, long reagent shelf life and portable instrument made this method optimal for point-of-care applications.
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http://dx.doi.org/10.1039/c3lc41059e | DOI Listing |
Nat Commun
December 2024
Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan, Taiwan.
Immune checkpoint inhibitors (ICI) represent new anticancer agents and have been used worldwide. However, ICI can potentially induce life-threatening severe cutaneous adverse reaction (SCAR), such as Stevens-Johnson syndrome/toxic epidermal necrolysis (SJS/TEN), hindering continuous ICI therapy. We examine 6 cohorts including 25 ICI-induced SJS/TEN patients and conduct single-cell RNA sequencing (scRNA-seq) analysis, which shows overexpression of macrophage-derived CXCL10 that recruits CXCR3 cytotoxic T lymphocytes (CTL) in blister cells from ICI-SJS/TEN skin lesions.
View Article and Find Full Text PDFHere we report results of a phase 1 multi-institutional, open-label, dose-escalation trial (NCT02744287) of BPX-601, an investigational autologous PSCA-directed GoCAR-T® cell product containing an inducible MyD88/CD40 ON-switch responsive to the activating dimerizer rimiducid, in patients with metastatic pancreatic (mPDAC) or castration-resistant prostate cancer (mCRPC). Primary objectives were to evaluate safety and tolerability and determine the recommended phase 2 dose/schedule (RP2D). Secondary objectives included the assessment of efficacy and characterization of the pharmacokinetics of rimiducid.
View Article and Find Full Text PDFJ Pediatr Hematol Oncol
January 2025
Centers for Cancer and Blood Disorders and Cancer and Immunology Research, Children's National Hospital.
Children with T-ALL/LBL require prompt diagnosis and treatment. Flow cytometric analysis of T-lineage and immaturity markers usually leads to a straightforward diagnosis. However, rare cases of T-ALL expressing bright CD45 and lacking expression of immature markers can be a diagnostic conundrum and difficult to differentiate from mature T-cell lymphomas lacking surface CD3 expression or aberrantly expressing immature markers, which affects treatment decisions and prognosis.
View Article and Find Full Text PDFIndian J Med Res
November 2024
Department of Receptor Biology and Tumor Metastasis, Chittaranjan National Cancer Institute, Kolkata, India.
Background & objectives The choice of anesthetic for better perioperative conservation of immune responses has always been contentious. This study investigated the differential impact of the intravenous anesthetic, propofol, and the volatile anesthetic, isoflurane on the T cell immune responses, if any, among individuals going through perioperative breast cancer. Methods Perioperative blood samples (preoperative, intraoperative and postoperative) collected from participants with breast cancer in two arms namely isoflurane arm (n=50) and the propofol arm (n=50) were analyzed for T cell immune response using flow cytometry and ELISA.
View Article and Find Full Text PDFFront Immunol
December 2024
Department of Nephrology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, China.
Kidney immune homeostasis is intricately linked to T cells. Inappropriate differentiation, activation, and effector functions of T cells lead to a spectrum of kidney disease. While executing immune functions, T cells undergo a series of metabolic rewiring to meet the rapid energy demand.
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