Although there is evidence that altitude increases the platelet count, its effect on the platelet precursor stimulating factor, thrombopoietin (TPO), is unclear. Unlike erythropoietin, TPO appears largely unresponsive to exogenous signals. In a study in 16 healthy volunteers, we report the effects of altitude exposure at between 1000 and 1822 m for 1 or 2 weeks on TPO, the platelet count (+ indices), erythropoietin, hemoglobin, hematocrit and erythrocytes (+ indices). There were significant post-exposure increases in TPO (57.9 vs 37.1 U/l; P=0.0006), platelet count (219.1 vs 208.0 x 10(3)/ml; P=0.031) and erythropoietin (16.1 vs 9.9 U/l; P=0.0032). There was a positive correlation between the increases in TPO and platelet count (r=0.52, P=0.043). Hemoglobin and hematocrit remained unchanged. Our results provide clear evidence for a relationship, presumably driven by hypoxia, between altitude exposure, TPO production and the platelet count.
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http://dx.doi.org/10.1160/TH04-02-0086 | DOI Listing |
Br J Haematol
December 2024
ICMR-National Institute of Immunohaematology (NIIH), K.E.M. Hospital Campus, Mumbai, India.
Br J Haematol
December 2024
Hematology, School of Medicine, Università degli Studi di Milano, Milan, Italy.
Brexucabtagene autoleucel (brexu-cel) has revolutionized the treatment of patients affected by mantle cell lymphomas. In this prospective, observational multicentre study, we evaluated 106 patients, with longitudinal brexu-cel kinetics in peripheral blood monitored in 61 of them. Clinical outcomes and toxicities are consistent with previous real-world evidence studies.
View Article and Find Full Text PDFEur J Med Res
December 2024
Department of Geriatric Respiratory and Critical Care, Anhui Geriatric Institute, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui, China.
Background: This study aimed to develop predictive models with robust generalization capabilities for assessing the risk of pulmonary embolism in patients with tuberculosis using machine learning algorithms.
Methods: Data were collected from two centers and categorized into development and validation cohorts. Using the development cohort, candidate variables were selected via the Recursive Feature Elimination (RFE) method.
BMC Pulm Med
December 2024
Department of Medical Oncology, Sinopharm TongMei General Hosptial, 5999 HeRui Street, Hengan New District, Yungang District, Datong, 037000, Shanxi Province, China.
Background: The prognostic significance of Neutrophil-to-Lymphocyte Ratio (NLR) and Platelet-to-Lymphocyte Ratio (PLR) in Small Cell Lung Cancer (SCLC) patients receiving platinum-based chemotherapy is debated.
Methods: This study aims to elucidate their roles in survival outcomes. A systematic search across PubMed, Embase, Web of Science, and Cochrane Library identified relevant studies.
Zhonghua Yu Fang Yi Xue Za Zhi
December 2024
Department of Clinical Laboratory Medicine, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan750002, China.
In order to investigate the clinical manifestations and laboratory findings associated with brucellosis for the purpose of facilitating prompt clinical diagnosis and effective treatment, as well as to offer a laboratory reference for the prevention of brucellosis outbreaks. In this study, a retrospective cohort design was employed to gather epidemiological characteristics, clinical symptoms, and associated laboratory data from 391 patients diagnosed with bacterial culture-positive brucellosis at the People's Hospital of Ningxia Hui Autonomous Region between 2019 and 2023. The patients were categorized into four age groups, with each group representing a 20 years age interval.
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