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Estrogen Deficiency alters Vascularization and Mineralization dynamics: insight from a novel 3D Humanized and Vascularized Bone Organoid Model.
Am J Physiol Cell Physiol
January 2025
Mechanobiology and Medical Device Research Group (MMDRG), Biomedical Engineering, College of Science and Engineering, University of Galway, Ireland.
Osteoporosis is not merely a disease of bone loss but also involves changes in the mineral composition of the bone that remains. studies have investigated these changes and revealed that estrogen deficiency alters osteoblast mineral deposition, osteocyte mechanosensitivity and osteocyte regulation of osteoclastogenesis. During healthy bone development, vascular cells stimulate bone mineralization via endochondral ossification, but estrogen deficiency impairs vascularization.
View Article and Find Full Text PDFChapter 7: CLINICAL FORMS AT DIFFERENT AGES OF LIFE: CHILDHOOD, PREGNANCY, LACTATION, OLD AGE.
Ann Endocrinol (Paris)
January 2025
Université Paris-Saclay, Inserm, Endocrine Physiology and Physiopathology, Assistance Publique-Hôpitaux de Paris, Hôpital Bicêtre, Service d'Endocrinologie et des Maladies de la Reproduction and Centre de Référence des Maladies Rares de l'Hypophyse HYPO, F-94270 Le Kremlin-Bicêtre, France. Electronic address:
Primary hyperparathyroidism is rare in children. A germline mutation is identified in half of all children with primary hyperparathyroidism (70% of newborns and infants, and 40% of children and adolescents). The clinical manifestations of primary hyperparathyroidism in children are highly variable (often absent in newborns, rather severe and symptomatic in children and adolescents) and depend on the genetic cause, as well as the severity, rapidity of onset and duration of hypercalcemia.
View Article and Find Full Text PDFBiomechanical insights into anterolateral vertebral screw fixation in osteoporotic spines: a comparative study of fixation methods and positions using porcine vertebrae.
J Orthop Surg Res
January 2025
Department of Orthopaedic Surgery, Spine Section, Bone and Joint Research Center, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan.
Objective: Combining oblique lumbar interbody fusion (OLIF) with posterior pedicle screw fixation (PPSF) has been proposed to reduce cage subsidence, especially in osteoporotic spines. Recently, anterolateral screw-rod fixation has gained interest as it allows direct pathology observation and avoids a posterior approach. However, controversies exist between anterolateral screw fixation systems and traditional PPSF due to variations in osteoporotic vertebral mineral density, screw fixation positions, and fixation methods (bicortical vs.
View Article and Find Full Text PDFDeep Learning for Discrimination of Early Spinal Tuberculosis from Acute Osteoporotic Vertebral Fracture on CT.
Infect Drug Resist
January 2025
Department of Orthopedics, First Affiliated Hospital, Chongqing Medical University, Chongqing, People's Republic of China.
Background: Early differentiation between spinal tuberculosis (STB) and acute osteoporotic vertebral compression fracture (OVCF) is crucial for determining the appropriate clinical management and treatment pathway, thereby significantly impacting patient outcomes.
Objective: To evaluate the efficacy of deep learning (DL) models using reconstructed sagittal CT images in the differentiation of early STB from acute OVCF, with the aim of enhancing diagnostic precision, reducing reliance on MRI and biopsies, and minimizing the risks of misdiagnosis.
Methods: Data were collected from 373 patients, with 302 patients recruited from a university-affiliated hospital serving as the training and internal validation sets, and an additional 71 patients from another university-affiliated hospital serving as the external validation set.
SNPs in GPCR Genes and Impaired Osteogenic Potency in Osteoporotic Patient Lines-Based Study.
Int J Mol Sci
December 2024
Institute of Cytology, Russian Academy of Sciences, St. Petersburg 194064, Russia.
G-protein-coupled receptors (GPCRs) have emerged as critical regulators of bone development and remodeling. In this study, we aimed to identify specific GPCR mutations in osteoporotic patients via next-generation sequencing (NGS). We performed NGS sequencing of six genomic DNA samples taken from osteoporotic patients and two genomic DNA samples from healthy donors.
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