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Full-Text Articles in Medicine and Health Sciences
Multispectral Imaging For Microchip Electrophoresis Enables Point-Of-Care Newborn Hemoglobin Variant Screening, Ran An, Yuning Huang, Anne Rocheleau, Qiaochu Zhang, Yuncheng Man, Zoe Sekyonda, Amma Owusu-Ansah, Umut A. Gurkan
Multispectral Imaging For Microchip Electrophoresis Enables Point-Of-Care Newborn Hemoglobin Variant Screening, Ran An, Yuning Huang, Anne Rocheleau, Qiaochu Zhang, Yuncheng Man, Zoe Sekyonda, Amma Owusu-Ansah, Umut A. Gurkan
Faculty Scholarship
Hemoglobin (Hb) disorders affect nearly 7% of the world's population. Globally, around 400,000 babies are born annually with sickle cell disease (SCD), primarily in sub-Saharan Africa where morbidity and mortality rates are high. Screening, early diagnosis, and monitoring are not widely accessible due to technical challenges and cost. We hypothesized that multispectral imaging will allow sensitive hemoglobin variant identification in existing affordable paper-based Hb electrophoresis. To test this hypothesis, we developed the first integrated point-of-care multispectral Hb variant test: Gazelle-Multispectral. Here, we evaluated the accuracy of Gazelle-Multispectral for Hb variant newborn screening in 265 newborns with known hemoglobin variants including …
Occlusionchip: A Functional Microcapillary Occlusion Assay Complementary To Ektacytometry For Detection Of Small-Fraction Red Blood Cells With Abnormal Deformability, Yuncheng Man, Ran An, Karamoja Monchamp, Zoe Sekyonda, Erdem Kucukal, Chiara Federici, William J. Wulftange, Utku Goreke, Allison Bode, Umut A. Gurkan
Occlusionchip: A Functional Microcapillary Occlusion Assay Complementary To Ektacytometry For Detection Of Small-Fraction Red Blood Cells With Abnormal Deformability, Yuncheng Man, Ran An, Karamoja Monchamp, Zoe Sekyonda, Erdem Kucukal, Chiara Federici, William J. Wulftange, Utku Goreke, Allison Bode, Umut A. Gurkan
Faculty Scholarship
Red blood cell (RBC) deformability is a valuable hemorheological biomarker that can be used to assess the clinical status and response to therapy of individuals with sickle cell disease (SCD). RBC deformability has been measured by ektacytometry for decades, which uses shear or osmolar stress. However, ektacytometry is a population based measurement that does not detect small-fractions of abnormal RBCs. A single cell-based, functional RBC deformability assay would complement ektacytometry and provide additional information. Here, we tested the relative merits of the OcclusionChip, which measures RBC deformability by microcapillary occlusion, and ektacytometry. We tested samples containing glutaraldehyde-stiffened RBCs for up …
Antithrombin-Iii Mitigates Thrombin-Mediated Endothelial Cell Contraction And Sickle Red Blood Cell Adhesion In Microscale Flow, William J. Wulftange, Erdem Kucukal, Yuncheng Man, Ran An, Karamoja Monchamp, Charlotte D. Sevrain, Himanshu R. Dashora, Allison Bode, Jane A. Little, Umut A. Gurkan
Antithrombin-Iii Mitigates Thrombin-Mediated Endothelial Cell Contraction And Sickle Red Blood Cell Adhesion In Microscale Flow, William J. Wulftange, Erdem Kucukal, Yuncheng Man, Ran An, Karamoja Monchamp, Charlotte D. Sevrain, Himanshu R. Dashora, Allison Bode, Jane A. Little, Umut A. Gurkan
Faculty Scholarship
Individuals with sickle cell disease (SCD) have persistently elevated thrombin generation that results in a state of systemic hypercoagulability. Antithrombin-III (ATIII), an endogenous serine protease inhibitor, inhibits several enzymes in the coagulation cascade, including thrombin. Here, we utilize a biomimetic microfluidic device to model the morphology and adhesive properties of endothelial cells (ECs) activated by thrombin and examine the efficacy of ATIII in mitigating the adhesion of SCD patient-derived red blood cells (RBCs) and EC retraction. Microfluidic devices were fabricated, seeded with ECs, and incubated under physiological shear stress. Cells were then activated with thrombin with or without an ATIII …