Honokiol, derived from Magnolia officinalis, has various pharmacological properties. Platelet activation plays a critical role in cardiovascular diseases. Honokiol has been reported to inhibit collagen-stimulated rabbit platelet aggregation. However, detailed further studies on the characteristics and functional activity of honokiol in platelet activation are relatively lacking. In the present study, honokiol specifically inhibited platelet aggregation and Ca ion mobilization stimulated with collagen or convulxin, an agonist of glycoprotein (GP) VI, but not with aggretin, an agonist of integrin αβ. Honokiol also attenuated the phosphorylation of Lyn, PLCγ2, PKC, MAPKs, and Akt after convulxin stimulation. Honokiol have no cytotoxicity in zebrafish embryos. Honokiol diminished the binding of anti-GP VI (FITC-JAQ1) mAb to human platelets, and it also reduced the coimmunoprecipitation of GP VI-bound Lyn after convulxin stimulation. The surface plasmon resonance results revealed that honokiol binds directly to GP VI, with a K of 289 μM. Platelet function analysis revealed that honokiol substantially prolonged the closure time in human whole blood and increased the occlusion time of thrombotic platelet plug formation in mice. In conclusion, honokiol acts as a potent antagonist of collagen GP VI in human platelets, and it has therapeutic potential in the prevention of the pathological thrombosis.
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http://dx.doi.org/10.1038/srep40002 | DOI Listing |
J Pediatr Hematol Oncol
January 2025
Departments of Laboratory Medicine.
Fetal and neonatal alloimmune thrombocytopenia (FNAIT) results from maternal antibodies targeting fetal platelets during pregnancy, often causing hemorrhagic manifestations detectable antenatally or shortly after birth. We report an atypical form of FNAIT with delayed onset in a healthy, breastfed male infant who developed diffuse petechiae 2 weeks after birth due to severe thrombocytopenia. The mother was shown to be negative for the human platelet antigen-1a (HPA-1a) allele but had anti-HPA-1a IgG antibodies, while the father and newborn were HPA-1a positive, confirming the diagnosis.
View Article and Find Full Text PDFMedicine (Baltimore)
January 2025
Faculty of Chinese Medicine, Macau University of Science and Technology, Taipa, Macau, China.
Rationale: Thrombotic microangiopathies (TMA) caused by malignant hypertension is an acute and critical disease among rare diseases. Although renal biopsy pathology is a golden indicator for diagnosing kidney disease, it cannot distinguish between primary and secondary TMA and requires a comprehensive diagnosis in conjunction with other laboratory tests and medical history.
Patient Concerns: A 33-year-old young man was hospitalized due to unexplained kidney failure.
Medicine (Baltimore)
January 2025
School of Medical Laboratory Sciences, Faculty of Health Sciences, Institute of Health, Jimma University, Jimma, Ethiopia.
Anemia is a worldwide public health problem and is associated with platelet disorders. The relationship between anemia and platelets is complex, with the association being either normal platelet count or thrombocytosis. Platelets are significantly decreased in patients with anemia, and thrombocytopenia has been documented in patients with severe anemia.
View Article and Find Full Text PDFAdv Skin Wound Care
January 2025
At Mayo Clinic, Rochester, Minnesota, United States, Paul T. Gomez, BS, is Summer Research Fellow, Regenerative Sciences Track, Mayo Clinic Graduate School of Biomedical Sciences; Saranya P. Wyles, MD, PhD, is Consultant, Department of Dermatology; and Karen L. Andrews, MD, is Director, Vascular Ulcer and Wound Healing Clinic/Gonda Vascular Center, and Consultant, Department of Physical Medicine and Rehabilitation. At Mayo Clinic, Jacksonville, Florida, Jennifer R. Arthurs is APRN, Center for Regenerative Medicine; and Alison J. Bruce, MB, ChB, is Consultant, Department of Dermatology.
Background: Chronic nonhealing neuropathic foot ulcers affect approximately 15% to 30% of patients with diabetes mellitus and are associated with significant morbidity and mortality. Although current strategies to address these chronic wounds include a multifactorial approach, clinical outcomes remain poor and warrant improvement. Platelet-rich plasma (PRP), derived from autologous or allogeneic blood, is an emerging regenerative product that aims to serve as an adjuvant to standard diabetic foot ulcer (DFU) treatment.
View Article and Find Full Text PDFCells
December 2024
Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, 37134 Verona, Italy.
Mutations in the genes , , and cause three clinically overlapping thrombocytopenias characterized by a predisposition to hematological neoplasms. The gene, which encodes a protein involved in protein-protein interactions, is downregulated by RUNX1 during megakaryopoiesis. Mutations in 5'UTR of ANKRD26, leading to ANKRD26-RT, disrupt this regulation, resulting in the persistent expression of ANKRD26, which leads to impaired platelet biogenesis and an increased risk of leukemia.
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