The effect of salinity was studied in natural populations of the black-chinned tilapia (Sarotherodon melanotheron) from West Africa. This euryhaline species colonizes nearly all coastal environments from bays to lagoons characterized by salinities ranging from fresh water to hypersaline water over 100 ‰. Individuals were sampled during the dry season at several locations characterized by different levels of salinity (3-102 ‰). Their osmotic status and their gills were analyzed. The branchial mitochondria-rich cells (MRC), localized at the basis of the filaments and along the lamellae in fish taken from the saline stations, showed a wide plasticity with significant differences in their number and size. The most striking results were a significant larger area (≈3x) and a higher number (≈55x) of MRC at high salinity (102 ‰) compared to low salinity (3 ‰). The major ion transporters and channels were localized by immunocytochemistry and different expression patterns have been recorded between stations. Despite an increased Na⁺/K⁺-ATPase (NKA) α-subunit expression and NKA activity, pointing to an increased monovalent ion excretion, a severe osmotic imbalance was recorded in animals living in hypersaline environments.
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http://dx.doi.org/10.1007/s00360-012-0657-8 | DOI Listing |
J Gastrointest Cancer
December 2024
Department of Traditional Chinese Medicine, The Second Affiliated Hospital of Shenzhen University (People's Hospital of Shenzhen Baoan District), Shenzhen, 518100, China.
Background And Objective: Colorectal cancer (CRC) is a leading cause of cancer-related mortality worldwide. Despite advances in treatment, metastatic colorectal cancer (mCRC) remains a significant challenge due to its heterogeneity and resistance to therapy. Regorafenib, a multikinase inhibitor, can inhibit tumor progression through multiple mechanisms, thereby improving patient prognosis.
View Article and Find Full Text PDFJ Orthop Surg Res
December 2024
Teaching and Research Section of Clinical Nursing, Xiangya Hospital of Central South University, 87 Xiangya Road, Kaifu District, Changsha, Hunan Province, China.
Objectives: This study aims to identify predictors of knee osteoarthritis (KOA) risk in middle-aged population, construct and validate a nomogram for KOA in this demographic.
Methods: From June to December 2020, we conducted a cross-sectional survey on 5,527 middle-aged individuals from Changsha and Zhangjiajie cities in Hunan Province, selected using a stratified multi-stage random sampling method. Data collection involved a structured questionnaire encompassing general demographic, physical condition, and lifestyle behaviors dimensions.
BMC Med
December 2024
Department of Non-Communicable Disease Epidemiology, Faculty of Epidemiology & Population Health, London, School of Hygiene and Tropical Medicine, London, UK.
Background: Direct oral anticoagulants (DOACs) have been reported to be associated with a higher risk of mortality compared with an older alternative, warfarin using primary care data in the United Kingdom (UK). However, other studies observed contradictory findings. We therefore aimed to investigate the association between mortality and warfarin, compared with DOACs.
View Article and Find Full Text PDFBMC Pediatr
December 2024
Department of Genetics and Endocrinology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou, 510623, China.
Background: Mucolipidosis (ML) II and III alpha/beta are lysosomal disorders caused by mutations in the GNPTAB gene which encodes the alpha and beta subunits of the heterohexameric enzyme, N-acetylglucosamine-1-phosphotransferase.
Method: To explore the clinical and molecular characteristics of the 20 ML II and III alpha/beta patients, clinical data was collected and GNPTAB gene was analyzed by nest PCR and direct Sanger-sequencing. The activity of several lysosomal enzymes was measured in the plasma.
Zhonghua Yu Fang Yi Xue Za Zhi
December 2024
Office of Epidemiology, Chinese Center for Disease Control and Prevention, Beijing102206, China Infectious Disease Prevention and Control Institute, Hainan Provincial Center for Disease Control and Prevention, Haikou570203, China Hainan Academy of Preventive Medicine, Haikou570203, China.
To explore the epidemiological characteristics of public health emergency events (PHEE) of varicella in the Beijing-Tianjin-Hebei region and analyze its related influencing factors. Excel was used to organize the varicella data in the Beijing-Tianjin-Hebei region from 2006 to 2021, reported by the management information system of PHEE, to describe the epidemiological characteristics of varicella events. Spatial autocorrelation and spatial scanning methods were used to test and determine its spatial clusters.
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