The effect of plasma lipoprotein fractions (large very-low-density lipoprotein, small very-low-density lipoprotein, intermediate-density lipoprotein, and low-density lipoprotein) on initiation of blood coagulation by supporting factor VII activation or by stimulating monocytes to express tissue factor was investigated in vitro. Endotoxin-free preparations of lipoprotein fractions did not induce functional tissue factor in monocytes, whereas all lipoprotein fractions enhanced tissue factor-independent activation of factor VII by factor Xa and by factors Xa/Va. In contrast, no or only slight enhancement of factor IXa-, factor IXa/VIIIa-, factor XIa-, or thrombin-mediated factor VII activation was observed. The effect of small very-low-density lipoprotein was less than that of large very-low-density lipoprotein, and intermediate-density and low-density lipoproteins caused an even lower but still significant increase of factor Xa- and factor Xa/Va-mediated factor VII activation. When the data were normalized for apolipoprotein B-100 content, differences remained between lipoprotein fractions. In contrast, when phospholipid content was used for normalization, differences between lipoprotein fractions in factor Xa- and factor Xa/Va-mediated factor VII activation disappeared, indicating that phospholipids were involved in factor VII activation. This was supported by enhancement of factor Xa-mediated factor VII activation by synthetic phospholipid vesicles containing negatively charged phospholipids.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1161/01.atv.20.7.1835 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Compound heterozygous mutations (p.L68R∗37 and p.T241N) lead to abnormal protein levels and structures in hereditary FVII deficiency.
Blood Coagul Fibrinolysis
December 2024
Department of Hematology, The Second Affiliated Hospital, Chongqing Medical University, Jiangnan, Chongqing, China.
Background: Congenital factor VII (FVII) deficiency is a genetic disorder characterized by decreased FVII activity, which sometimes leads to fatal bleeding. Numerous variants have been found in FVII deficiency, but mutations vary among patients. Each mutation deserves further exploration for each patient at risk of bleeding.
View Article and Find Full Text PDFmBAT: a newly developed mobile application for self-screening of pediatric bleeding disorders - a multi-center study.
Ann Hematol
January 2025
Division of Hematology and Oncology, Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, 270 Rama VI Road, Ratchathewi District, Bangkok, Thailand.
Bleeding assessment tools (BATs) are used by trained medical personnel for screening bleeding disorders on a one-to-one basis with patients; hence, they are time-consuming and limited in use for large-population screening. The aims of the study were to develop, validate, and demonstrate a Thai BAT mobile application (mBAT) for self-screening of bleeding disorders. mBAT was developed and validated using the paper-based Thai version of pediatric bleeding questionnaire (TPBQ).
View Article and Find Full Text PDFDurable remission after ileocolic resection for Crohn's disease is achievable in selected patients. Long-term results of a prospective multicentric cohort study of the GETAID Chirurgie.
J Crohns Colitis
January 2025
Service de Chirurgie Digestive, Hôpital Bicêtre, APHP, Faculté de médecine Paris-Saclay, 94275 Le Kremlin-Bicêtre, France.
Background And Aims: Postoperative recurrence requiring medical treatment intensification or redo-surgery is common after ileocolic resection (ICR) for Crohn's disease (CD). This study aimed to identify a subgroup of CD patients for whom ICR could achieve durable remission.
Methods: This retrospective follow-up study analyzed 592 CD patients who underwent ICR (2013-2015) in a nationwide prospective cohort.
Risk Factors Related to Resting Metabolic Rate-Related Gene Variation in Children with Overweight/Obesity: 3-Year Panel Study.
Nutrients
December 2024
Department of Food & Nutrition & Research Institute of Obesity Sciences, Sungshin Women's University, Dobongro-76gagil-55, Kangbuk-ku, Seoul 01133, Republic of Korea.
Unlabelled: This study investigated how the gene variation related to RMR alteration affects risk factors of obese environments in children with obesity aged 8-9.
Methods: Over a three-year follow-up period, 63.3% of original students participated.
Bleeding Symptoms in Pediatric Patients with Congenital FVII Deficiency and Correlation to Thrombin Generation Assay Parameters: A Single-Center Retrospective Analysis.
Life (Basel)
November 2024
Onco-Hematology, Cell and Gene Therapy and Bone Marrow Transplant Clinic Area, Bambino Gesù Children's Hospital, IRCCS, 00165 Rome, Italy.
Inherited factor VII deficiency is the most common rare bleeding disorder, affecting about 1/500,000 individuals without gender predilection. Most of the patients with FVII 20-50% are asymptomatic, but post-traumatic or post-surgical bleeding may often occur since there is not an exact correlation between FVII plasma levels and the bleeding phenotype. We enrolled 19 children and adolescents with FVII levels of 20-35% and 33 controls.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!