Genetic Background of Patients With Low Von Willebrand Factor Levels

NCT05116501 | Unknown DMC

• 1 other identifier: 2392
• Study Type: interventional
• Target: 300
• Locations: 1 country
• Sites: 1

Brief Summary

Von Willebrand disease (VWD) is caused by either quantitative or qualitative von Willebrand (VWF) defects and is the commonest inherited bleeding disorder with an estimated prevalence of about 1% in the general population. According to several guidelines, patients with a mild quantitative reduction in VWF (30-50 IU/dL) should be labeled as "low VWF". Quantitatively VWF defects account for almost 75% of all cases with VWD and among them, low VWF seems to be the most common form. Studies on patients with VWD reported only around 50% VWF mutations in low VWF cases indicating that some possible genes outside of the VWF gene may be responsible for the low VWF levels. To date, using genome-wide association study (GWAS) more than 19 non-VWF loci (such as ABO blood group system, Stabilin 2, Scavenger Receptor Class A Member 5, C-Type Lectin Domain Family 4 Member M, etc.) were identified to be associated with VWF levels. The identified genes are related to different mechanisms of the VWF life-cycle such as synthesis, secretion, glycosylation, or clearance. Despite the importance of the genetic background of low VWF levels for understanding its etiology, this issue is not well investigated yet. Thus the Low VWF Milan Cohort (LOVMIC) Study is designed to address some unanswered questions in patients with low VWF.

Conditions

Low Von Willebrand Factor

Keywords

von Willebrand factor; VWF; Von Willebrand disease; VWD; Low VWF; NGS; Whole exome sequencing

Outcome Measures

Primary Outcomes (1)

• Genetic variants in the VWF gene or other genes associated with low VWF plasma levels

  More than 19 different genes have been identified by genome-wide association studies that affect the plasma VWF levels. These genes (in addition to VWF) are including STXBP5, SCARA5, ABO, STAB2, STX2, TCN2, CLEC4M, PDHB/PXK/KCTD6, SLC39A8, FCHO2/TMEM171/TNPO1, HLA, GIMAP7/GIMAP4, OR13C5/NIPSNAP, DAB2IP, C2CD4B, RAB5C-KAT2A, TAB1/SYNGR1, and ARSA. Some studies showed an association between specific variants with a minor allele frequency (MAF) \> 10% and the reduction of VWF levels or severe clinical symptoms in patients with VWD. As a primary outcome, whole-exome sequencing will be carried out in 300 subjects (150 patients and 150 healthy controls) to identify variants either in the VWF gene or the aforementioned genes or some new genes that are associated with reduced VWF levels in plasma.

  8 months after starting the project

Secondary Outcomes (1)

• Correlation between the bleeding presentation and identified variants in patients with low VWF

  12 months after starting the project

Study Arms (2)

low VWF

EXPERIMENTAL

In patients with low VWF levels, whole-exome sequencing will be performed to identity possible variants in the VWF gene or other genes that are associated with reduced VWF plasma levels. Furthermore, a correlation study between variants identified and the bleeding symptoms of patients will be performed.

Diagnostic Test: Whole-exome sequencing

Healthy controls

OTHER

In healthy controls, the investigators will analyze the whole-exome sequencing to include the variants that are either not present in healthy controls or are present but with a significantly lower frequency than the patients.

Diagnostic Test: Whole-exome sequencing

Interventions

Whole-exome sequencing DIAGNOSTIC_TEST

Whole Exome Sequencing (WES), as a comprehensive genetic test, will be used to identify changes in a patient's DNA that are causative or related to patient's low VWF levels.

Healthy controls; low VWF

Eligibility Criteria

• Age: 18 Years - 80 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Adult patients who were diagnosed with "low VWF" and have VWF:Ag and/or VWF:RCo between 30-50 IU/dL with a ratio of VWF:RCo/VWF:Ag \> 0.6.
• Subjects who have given informed consent to participate in the study according to the Declaration of Helsinki
• Healthy subjects with no known bleeding disorders and with negative thrombophilia screening results
• Subjects who have given informed consent to participate in the study according to the Declaration of Helsinki

You may not qualify if:

• Pregnant women
• Patients with acquired von Willebrand disease syndrome

Sponsors & Collaborators

• Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico: lead

Study Sites (1)

Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, A.B.Bonomi Hemophilia and Thrombosis Center

Milan, Lombardy, 20122, Italy

RECRUITING

Related Publications (6)

• James PD, Connell NT, Ameer B, Di Paola J, Eikenboom J, Giraud N, Haberichter S, Jacobs-Pratt V, Konkle B, McLintock C, McRae S, R Montgomery R, O'Donnell JS, Scappe N, Sidonio R, Flood VH, Husainat N, Kalot MA, Mustafa RA. ASH ISTH NHF WFH 2021 guidelines on the diagnosis of von Willebrand disease. Blood Adv. 2021 Jan 12;5(1):280-300. doi: 10.1182/bloodadvances.2020003265.

  PMID: 33570651 BACKGROUND

• Rodeghiero F, Castaman G, Dini E. Epidemiological investigation of the prevalence of von Willebrand's disease. Blood. 1987 Feb;69(2):454-9.

  PMID: 3492222 RESULT

• Laffan MA, Lester W, O'Donnell JS, Will A, Tait RC, Goodeve A, Millar CM, Keeling DM. The diagnosis and management of von Willebrand disease: a United Kingdom Haemophilia Centre Doctors Organization guideline approved by the British Committee for Standards in Haematology. Br J Haematol. 2014 Nov;167(4):453-65. doi: 10.1111/bjh.13064. Epub 2014 Aug 12. No abstract available.

  PMID: 25113304 RESULT

• Lavin M, Aguila S, Schneppenheim S, Dalton N, Jones KL, O'Sullivan JM, O'Connell NM, Ryan K, White B, Byrne M, Rafferty M, Doyle MM, Nolan M, Preston RJS, Budde U, James P, Di Paola J, O'Donnell JS. Novel insights into the clinical phenotype and pathophysiology underlying low VWF levels. Blood. 2017 Nov 23;130(21):2344-2353. doi: 10.1182/blood-2017-05-786699. Epub 2017 Sep 15.

  PMID: 28916584 RESULT

• Flood VH, Christopherson PA, Gill JC, Friedman KD, Haberichter SL, Bellissimo DB, Udani RA, Dasgupta M, Hoffmann RG, Ragni MV, Shapiro AD, Lusher JM, Lentz SR, Abshire TC, Leissinger C, Hoots WK, Manco-Johnson MJ, Gruppo RA, Boggio LN, Montgomery KT, Goodeve AC, James PD, Lillicrap D, Peake IR, Montgomery RR. Clinical and laboratory variability in a cohort of patients diagnosed with type 1 VWD in the United States. Blood. 2016 May 19;127(20):2481-8. doi: 10.1182/blood-2015-10-673681. Epub 2016 Feb 9.

  PMID: 26862110 RESULT

• Sabater-Lleal M, Huffman JE, de Vries PS, Marten J, Mastrangelo MA, Song C, Pankratz N, Ward-Caviness CK, Yanek LR, Trompet S, Delgado GE, Guo X, Bartz TM, Martinez-Perez A, Germain M, de Haan HG, Ozel AB, Polasek O, Smith AV, Eicher JD, Reiner AP, Tang W, Davies NM, Stott DJ, Rotter JI, Tofler GH, Boerwinkle E, de Maat MPM, Kleber ME, Welsh P, Brody JA, Chen MH, Vaidya D, Soria JM, Suchon P, van Hylckama Vlieg A, Desch KC, Kolcic I, Joshi PK, Launer LJ, Harris TB, Campbell H, Rudan I, Becker DM, Li JZ, Rivadeneira F, Uitterlinden AG, Hofman A, Franco OH, Cushman M, Psaty BM, Morange PE, McKnight B, Chong MR, Fernandez-Cadenas I, Rosand J, Lindgren A; INVENT Consortium; MEGASTROKE Consortium of the International Stroke Genetics Consortium (ISGC); Gudnason V, Wilson JF, Hayward C, Ginsburg D, Fornage M, Rosendaal FR, Souto JC, Becker LC, Jenny NS, Marz W, Jukema JW, Dehghan A, Tregouet DA, Morrison AC, Johnson AD, O'Donnell CJ, Strachan DP, Lowenstein CJ, Smith NL. Genome-Wide Association Transethnic Meta-Analyses Identifies Novel Associations Regulating Coagulation Factor VIII and von Willebrand Factor Plasma Levels. Circulation. 2019 Jan 29;139(5):620-635. doi: 10.1161/CIRCULATIONAHA.118.034532.

  PMID: 30586737 RESULT

MeSH Terms

Conditions

von Willebrand Diseases

Interventions

Exome

Condition Hierarchy (Ancestors)

Blood Coagulation Disorders, Inherited; Blood Coagulation Disorders; Hematologic Diseases; Hemic and Lymphatic Diseases; Coagulation Protein Disorders; Blood Platelet Disorders; Hemorrhagic Disorders; Genetic Diseases, Inborn; Congenital, Hereditary, and Neonatal Diseases and Abnormalities

Intervention Hierarchy (Ancestors)

Genome; Genetic Structures; Genetic Phenomena

Study Officials

• Flora Peyvandi, MD, PhD

  A.Bonomi Hemophilia and Thrombosis Center, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Flora Peyvandi, MD, PhD

CONTACT

02-55035414; flora.peyvandi@policlinico.mi.it

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NON RANDOMIZED
• Masking: NONE
• Purpose: BASIC SCIENCE
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: September 27, 2021
• First Posted: November 11, 2021
• Study Start: March 1, 2022
• Primary Completion: October 30, 2022
• Study Completion: May 30, 2023
• Last Updated: March 4, 2022

Record last verified: 2021-09

Data Sharing

• IPD Sharing: Will not share

Locations

IT (1)