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Anti-platelet factor 4 antibody-mediated disorders: an updated narrative review.
Semin Thromb Hemost
January 2025
of Medicine, Universita degli Studi di Padova Scuola di Medicina e Chirurgia, Padova, Italy.
Anti-platelet factor 4 (PF4) antibody-mediated disorders are a heterogenous group of diseases characterized by the presence of highly pathogenic immunoglobulins G directed against PF4 and/or PF4/heparin complexes. These antibodies are able to activate platelets, neutrophils and monocytes, thus resulting in thrombocytopenia and a hypercoagulable state. Five different forms of anti-PF4 antibody-mediated disorders have been identified: i) classic heparin-induced thrombocytopenia (cHIT) mediated by heparin and certain polyanionic drugs; ii) autoimmune HIT (aHIT) characterized by the presence of anti-PFA/polyanion antibodies that can strongly activate platelets even in the absence of heparin; iii) spontaneous HIT (spHIT) characterized by thrombocytopenia and thrombosis without proximate exposure to heparin, with two subtypes: (a) post-total knee arthroplasty, and cardiac surgery using cardiopulmonary bypass or extracorporeal membrane oxygenation, and (b) post-infections; iv) vaccine-induced immune thrombotic thrombocytopenia (VITT) characterized by thrombocytopenia, arterial and venous thrombosis, or secondary hemorrhage after receiving adenoviral vector vaccines for COVID-19; v) VITT-like disorders triggered by adenoviral infections.
View Article and Find Full Text PDFThe association between gestational selective serotonin reuptake inhibitor (SSRI) treatment and newborn thyroid screen: a large-scale cohort study.
BMC Pediatr
January 2025
Institute of Pediatric Endocrinology, Dana Dwek Children's Hospital, Tel Aviv Sourasky Medical Center, 6 Weizmann Street, 6423906, Tel Aviv, Israel.
Background: The diagnosis of depression or anxiety treated by SSRIs has become relatively common in women of childbearing age. However, the impact of gestational SSRI treatment on newborn thyroid function is lacking. We explored the impact of gestational SSRI treatment on newborn thyroid function as measured by the National Newborn Screening (NBS) Program and identified contributory factors.
View Article and Find Full Text PDFThe Role of CBGTC Synaptic Neurotransmission in the Pathophysiology of Tics.
Psychiatr Clin North Am
March 2025
Department of Neurology, Johns Hopkins University School of Medicine, Kennedy Krieger Institute, Baltimore, MD, USA.
The pathophysiology of tic disorders involves an alteration in the transmission of messages through the cortico-basal ganglia-thalamo-cortical circuit. A major requirement for the passage of a message through this circuit is an intact chemically mediated synaptic neurotransmitter system (ie, neurotransmitters and second messengers). This article reviews the scientific evidence supporting the involvement of a variety of neurotransmitters (ie, dopamine, glutamate, gamma-aminobutyric acid, serotonin, acetylcholine, and the opioid system).
View Article and Find Full Text PDFAntidepressants versus placebo for generalised anxiety disorder (GAD).
Cochrane Database Syst Rev
January 2025
Department of Psychiatry and Department of Epidemiology and Biostatistics, Western University, St Thomas, Canada.
Background: Generalised anxiety disorder (GAD) is a mental health condition characterised by excessive anxiety and worry about everyday events. GAD is a common disorder and generally affects women twice as often as men. Treatments include various psychological and pharmacological therapies.
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