Laboratory Medicine Commons^™

The Mathematical Model Predicts Peripheral Blood Cd34+ Cell Yield And Blood Volume Processing For Peripheral Blood Stem Cell Apheresis., Rattaporn Vichitratchaneekorn, Kanokpol Siriphanthong, Kanokwan Chinbordee, Phandee Watanaboonyongcharoen, Ponlapat Ronjnuckarin

Chulalongkorn Medical Journal

Introduction: The accurate prediction of stem cell yields is important for planning peripheral blood stem cell (PBSC) collection. This study aimed to develop a formula forecasting required blood volume processing to ensure adequate CD34+ cell products.

Methods: Data from donors and patients who underwent PBSC apheresis conducted at a tertiary care hospital were reviewed. BD FACSCanto™ II and Navios EX flow cytometry machines were used to determine the pre-collection CD34+ cell counts (preCD34).

Results: Of 50 donors and 85 patients, 145 leukapheresis procedures were performed. Linear regression models accurately predicted absolute CD34+ cell yields from pre-apheresis values, supporting optimal procedural …

Incidence Of Cytogenetic Abnormalities Detected By Fish Analysis In Multiple Myeloma Cases: A Seven-Year Study From A Cytogenetic Laboratory In King Chulalongkorn Memorial Hospital, Thailand (2018–2024), Montakarn Tansatit, Nutcharee Jongpornchai, Suwannee Songchart, Kittipornpan Krajokpap, Hudadini Da-Oh

Chulalongkorn Medical Journal

Background: Multiple myeloma (MM) is a genetically heterogeneous plasma cell malignancy with cytogenetic abnormalities influencing prognosis and treatment outcomes. Fluorescence in situ hybridization (FISH) is crucial for detecting clinically significant abnormalities, including IGH translocations and deletions (e.g., del(17p)), particularly in non-dividing plasma cells. However, cost and accessibility challenges limit comprehensive testing in resource-constrained settings like Thailand. Objectives: To investigate the incidence of cytogenetic abnormalities detected by FISH in MM cases over seven years in a Thai population, highlighting regional trends and barriers to comprehensive testing. Methods: A retrospective analysis was conducted on 360 bone marrow samples from MM patients between …

Contact Pathway Factors As Potential Modifiers Of Bleeding Related To Factor Xi Deficiency, Ivy R. Han, Leah Rosenfeldt, Courtney Young, Bal Krishan Phd, Rachel Cantrell Phd, Cassie Sprague, Mousa Kharnaf, William Abplanalp, Joseph Palumbo Md

Williams Honors College, Honors Research Projects

Factor XI (FXI) deficiency, also known as Hemophilia C, is characterized by mild to moderate bleeding symptoms. However, the factors that modify bleeding severity in FXI deficiency are not fully understood. In this study, we investigated whether components of the contact activation pathway can act as modifiers of bleeding in the context of FXI deficiency. Using a tail vein transection (TVT) model in rats, we assessed bleeding in four experimental groups: wild-type Sprague-Dawley rats, Prekallikrein knockout (PKK^-/-) rats, rats treated with a FXI-inhibiting antibody, and PKK-/- rats treated with the FXI antibody.

Under anesthesia, each rat underwent a …

Distinguishing Leukemic Cells Using Fractal Chromatin Patterns And Machine Learning, Abigail Gordhamer, Paul Young, Ryan Cordner

Annual Research Symposium

One of the most important tests in the clinical laboratory is the Complete Blood Count, which involves identifying the white blood cells in a patient’s blood. The respective counts of the different white blood cell types correlate with various states of health and disease, and are critical to diagnosing diseases such as leukemia. Leukemic cells are considered especially difficult to distinguish, and it is of the upmost importance that these cells are identified correctly. To aid in the process of leukemic cell identification, we quantified fractal patterns in the chromatin of white blood cells and used the data to identify …

Chromatin Pattern Quantification For The Differentiation Of White Blood Cells, Paul Young, Ryan Cordner, Abigail Gordhamer

Annual Research Symposium

Nuclear chromatin patterns have been used historically to distinguish between different developmental stages and lineages of white blood cells. While it is common to characterize cells based on arbitrary ‘open’ or ‘closed’ chromatin patterns, quantification of chromatin data is lacking. By extracting nuclei from a database of white blood cells and running fractal analyses using TWOMBLI, we were able to produce meaningful data quantifying chromatin patterns. Our data were put through a random forest algorithm which grouped each point based on relationship probability. The algorithm compared immature and mature cell types as well as cells of similar maturity and differing …

Dpp8 Selective Inhibitor Tominostat As A Novel And Broad-Spectrum Anticancer Agent Against Hematological Malignancies, Shohei Kikuchi, Akinori Wada, Yusuke Kamihara, Kosuke Okazaki, Paras Jawaid, Mati Ur Rehman, Eiji Kobayashi, Takeshi Susukida, Tomoki Minemura, Yoshimi Nabe

Department of Biological & Biomedical Sciences

DPP8/9 inhibition induces either pyroptotic or apoptotic cell death in hematological malignancies. We previously reported that treatment with the DPP8/9 inhibitor 1G244 resulted in apoptotic cell death in myeloma, and our current study further evaluates the mechanism of action of 1G244 in different blood cancer cell lines. Specifically, 1G244 inhibited DPP9 to induce GSDMD-mediated-pyroptosis at low concentrations and inhibited DPP8 to cause caspase-3-mediated-apoptosis at high concentrations. HCK expression is necessary to induce susceptibility to pyroptosis but does not participate in the induction of apoptosis. To further characterize this DPP8-dependent broad-spectrum apoptosis induction effect, we evaluated the potential antineoplastic role for …

A High-Resolution 3d Atlas Of The Spectrum Of Tuberculous Andcovid-19 Lung Lesions, Gordon Wells, Joel N Glasgow, Kievershen Nargan, Kapongo Lumamba, Rajhmun Madansein, Kameel Maharaj, Leon Y Perumal, Malcolm Matthew, Robert L Hunter, Hayden Pacl, Jacelyn E Peabody Lever, Denise D Stanford, Satinder P Singh, Prachi Bajpai, Upender Manne, Paul V Benson, Steven M Rowe, Stephan Le Roux, Alex Sigal, Muofhe Tshibalanganda, Carlyn Wells, Anton Du Plessis, Mpumelelo Msimang, Threnesan Naidoo, Adrie J C Steyn

Faculty, Staff and Student Publications

Our current understanding of the spectrum of TB and COVID-19 lesions in the human lung is limited by a reliance on low-resolution imaging platforms that cannot provide accurate 3D representations of lesion types within the context of the whole lung. To characterize TB and COVID-19 lesions in 3D, we applied micro/nanocomputed tomography to surgically resected, postmortem, and paraffin-embedded human lung tissue. We define a spectrum of TB pathologies, including cavitary lesions, calcium deposits outside and inside necrotic granulomas and mycetomas, and vascular rearrangement. We identified an unusual spatial arrangement of vasculature within an entire COVID-19 lobe, and 3D segmentation of …

B-Lymphoblastic Leukemia With Burkitt-Like Morphology And Aberrant Myeloperoxidase Expression: A Diagnostic Conundrum, Karen A Nahmod, Wei Wang, Karan Saluja, Zhenya Tang, L Jeffrey Medeiros, Beenu Thakral

Faculty, Staff and Student Publications

No abstract provided.

A Validated Composite Organ And Hematologic Response Model For Early Assessment Of Treatment Outcomes In Light Chain Amyloidosis, Surbhi Sidana, Paolo Milani, Moritz Binder, Marco Basset, Nidhi Tandon, Andrea Foli, Angela Dispenzieri, Morie A Gertz, Suzanne R Hayman, Francis K Buadi, Martha Q Lacy, Prashant Kapoor, Nelson Leung, S Vincent Rajkumar, Giampaolo Merlini, Giovanni Palladini, Shaji K Kumar

Faculty, Staff and Student Publications

Newly diagnosed AL amyloidosis patients were evaluated to develop a model for early assessment of treatment benefit at 6 months, integrating both hematologic (HR) and organ response (OR) assessment (testing cohort, Mayo: n = 473; validation cohort, Pavia: n = 575). Multiple OR were assessed as follows: All OR (AOR): response in all organs, mixed OR (MOR): response in some organs, no OR (NOR)]. AOR rates at 6 months improved with deepening HR; complete response (CR; 38%, 35%), very good partial response (VGPR; 30%, 26%), and partial response (PR; 16%, 21%), respectively. A composite HR/OR (CHOR) model was developed using …

Educational Case: Systemic Mastocytosis With An Associated Hematological Neoplasm, Brenda Mai, Md A Wahed, Lei Chen, Nghia D Nguyen, Xiaohong Iris Wang, Zhihong Hu

Faculty, Staff and Student Publications

The following fictional case is intended as a learning tool within the Pathology Competencies for Medical Education (PCME), a set of national standards for teaching pathology. These are divided into three basic competencies: Disease Mechanisms and Processes, Organ System Pathology, and Diagnostic Medicine and Therapeutic Pathology. For additional information, and a full list of learning objectives for all three competencies, see http://journals.sagepub.com/doi/10.1177/2374289517715040.1