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Hemophilia carriers

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https://www.readbyqxmd.com/read/29754767/preconception-carrier-screening-by-genome-sequencing-results-from-the-clinical-laboratory
#1
Sumit Punj, Yassmine Akkari, Jennifer Huang, Fei Yang, Allison Creason, Christine Pak, Amiee Potter, Michael O Dorschner, Deborah A Nickerson, Peggy D Robertson, Gail P Jarvik, Laura M Amendola, Jennifer Schleit, Dana Kostiner Simpson, Alan F Rope, Jacob Reiss, Tia Kauffman, Marian J Gilmore, Patricia Himes, Benjamin Wilfond, Katrina A B Goddard, C Sue Richards
Advances in sequencing technologies permit the analysis of a larger selection of genes for preconception carrier screening. The study was designed as a sequential carrier screen using genome sequencing to analyze 728 gene-disorder pairs for carrier and medically actionable conditions in 131 women and their partners (n = 71) who were planning a pregnancy. We report here on the clinical laboratory results from this expanded carrier screening program. Variants were filtered and classified using the latest American College of Medical Genetics and Genomics (ACMG) guideline; only pathogenic and likely pathogenic variants were confirmed by orthologous methods before being reported...
May 3, 2018: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29652675/an-intronic-mutation-c-6430-3c-g-in-the-f8-gene-causes-splicing-efficiency-and-premature-termination-in-hemophilia-a
#2
Zunjing Xia, Jie Lin, Lingping Lu, Chol Kim, Ping Yu, Ming Qi
: Hemophilia A is a bleeding disorder caused by coagulation factor VIII protein deficiency or dysfunction, which is classified into severe, moderate, and mild according to factor clotting activity. An overwhelming majority of missense and nonsense mutations occur in exons of F8 gene, whereas mutations in introns can also be pathogenic. This study aimed to investigate the effect of an intronic mutation, c.6430-3C>G (IVS22-3C>G), on pre-mRNA splicing of the F8 gene. We applied DNA and cDNA sequencing in a Chinese boy with hemophilia A to search if any pathogenic mutation in the F8 gene...
June 2018: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/29520365/platelet-targeted-gene-therapy-for-hemophilia
#3
REVIEW
Qizhen Shi
Gene therapy is an attractive approach for disease treatment. Since platelets are abundant cells circulating in blood with the distinctive abilities of storage and delivery and fundamental roles in hemostasis and immunity, they could be a unique target for gene therapy of diseases. Recent studies have demonstrated that ectopic expression of factor VIII (FVIII) in platelets under control of the platelet-specific promoter results in FVIII storage together with its carrier protein von Willebrand factor (VWF) in α-granules and the phenotypic correction of hemophilia A...
June 15, 2018: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/29274203/establishing-a-comprehensive-genetic-diagnosis-strategy-for-hemophilia-b-and-its-application-in-chinese-population
#4
X Y Lin, J Wang, X Xiao, Y W Xu, Q J Yan, W Y Jiang
INTRODUCTION: To reduce the incidence of hemophilia B (HB) which with no complete cure currently, prenatal diagnosis and preimplantation genetic diagnosis (PGD) are effective and feasible means. However, previous studies about genetic diagnosis in HB mostly just focused on the detection of patients and carriers. Here, we established a comprehensive genetic diagnosis strategy for HB and worked it out in Chinese population. The strategy includes the detection of patients and carriers, prenatal diagnosis, and PGD...
April 2018: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/29178325/the-spectrum-of-bleeding-in-women-and-girls-with-haemophilia-b
#5
REVIEW
J Staber, S E Croteau, J Davis, E F Grabowski, P Kouides, R F Sidonio
Although hemophilia B affects 1 in 25,000 males there may be 3 female hemophilia B carriers per affected male. This clinical review highlights the unique challenges faced by hemophilia B carriers including the under-recognition of bleeding symptoms associated with and without FIX deficiency, discrepancies in correlation between genotype and bleeding phenotype and therapeutic considerations utilizing clinical vignettes of common scenarios.
March 2018: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28820407/-evaluation-of-parameters-of-hemostasis-in-the-third-trimester-in-pregnant-women-with-congen%C3%A4-tal-hemorrhagic-diathesis
#6
L Rzaguliyeva, G Afandiyeva, N Malikqasımova
The aim is to study the coagulogram indices in the III trimester of pregnancy in women with hemophilia and von Willebrand disease. Twenty-seven pregnant women with hereditary coagulopathies of mild and moderate form (mean age 27.9±3.3 years) in the third trimester of pregnancy were examined. Of the examined 12 women - carriers of hemophilia A and B, 15 - with Willebrand disease (BV). Clinico-laboratory examination, clinical and biochemical blood tests were carried out. Coagulologic examination was performed on 17 parameters...
July 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28731872/bleeding-risk-assessment-in-hemophilia-a-carriers-from-dakar-senegal
#7
Moussa Seck, Blaise F Faye, Abibatou Sall, Diariétou Sy, Sokhna A Touré, Nata Dieng, Youssou B Guéye, Macoura Gadji, Awa O Touré, Cathérine Costa, Dominique Lasne, Chantal Rothschild, Saliou Diop
: Hemophilia A carriers have an abnormal X chromosome with a molecular abnormality of FVIII gene. These carriers, long considered to be free of bleeding risk, could have the same symptoms as mild hemophiliacs. This study aim to assess bleeding risk of hemophilia A carriers monitored at the Clinical Hematology Department of Dakar. This is a prospective study of a period of 6 months including 22 hemophilia A carriers aged between 8 and 48 years. Hemophilia carriers were recruited using the genealogical tree of hemophiliacs followed in the service...
December 2017: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/28547664/-it-was-a-lot-tougher-than-i-thought-it-would-be-a-qualitative-study-on-the-changing-nature-of-being-a-hemophilia-carrier
#8
Charlotte von der Lippe, Jan C Frich, Anna Harris, Kari Nyheim Solbrække
Studies on carriers of genetic disorders mainly focus on the process of genetic testing and reproductive choices, and less on how psychosocial aspects of being a carrier change over time. Our study sought to understand more about the psychosocial aspects of hemophilia carrier status, and thereby improve counseling aiming to advance carriers' quality of life and well-being. We analyzed 16 in-depth interviews from women who were carriers of hemophilia and had a son with hemophilia. Three themes emerged: Guilt and sorrow across generations; the choices and future consequences of genetic testing; and preparing to have a child with hemophilia...
December 2017: Journal of Genetic Counseling
https://www.readbyqxmd.com/read/28490568/noninvasive-detection-of-f8-int22h-related-inversions-and-sequence-variants-in-maternal-plasma-of-hemophilia-carriers
#9
Irena Hudecova, Peiyong Jiang, Joanna Davies, Y M Dennis Lo, Rezan A Kadir, Rossa W K Chiu
Direct detection of F8 and F9 sequence variants in maternal plasma of hemophilia carriers has been demonstrated by microfluidics digital PCR. Noninvasive prenatal assessment of the most clinically relevant group of sequence variants among patients with hemophilia, namely, those involving int22h -related inversions disrupting the F8 gene, poses additional challenges because of its molecular complexity. We investigated the use of droplet digital PCR (ddPCR) and targeted massively parallel sequencing (MPS) for maternal plasma DNA analysis to noninvasively determine fetal mutational status in pregnancies at risk for hemophilia...
July 20, 2017: Blood
https://www.readbyqxmd.com/read/28345288/single-tube-tetradecaplex-panel-of-highly-polymorphic-microsatellite-markers-1-mb-from-f8-for-simplified-preimplantation-genetic-diagnosis-of-hemophilia-a
#10
M Zhao, M Chen, A S C Tan, F S H Cheah, J Mathew, P C Wong, S S Chong
Essentials Preimplantation genetic diagnosis (PGD) of severe hemophilia A relies on linkage analysis. Simultaneous multi-marker screening can simplify selection of informative markers in a couple. We developed a single-tube tetradecaplex panel of polymorphic markers for hemophilia A PGD use. Informative markers can be used for linkage analysis alone or combined with mutation detection. SUMMARY: Background It is currently not possible to perform single-cell preimplantation genetic diagnosis (PGD) to directly detect the common inversion mutations of the factor VIII (F8) gene responsible for severe hemophilia A (HEMA)...
March 27, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28222949/rare-bleeding-disorders-old-diseases-in-the-era-of-novel-options-for-therapy
#11
Tami Livnat, Assaf Arie Barg, Sarina Levy-Mendelovich, Gili Kenet
Rare diseases are defined as life-threatening or chronically debilitating diseases with a prevalence of less than one per 2000 according to the European Union or one per 1250 according to the USA. Congenital rare bleeding disorders RBD are reported in most populations, with incidence varying from 1 in 5000 (Hemophilia A), 1:30,000 (Hemophilia B) to much rarer (1:500,000 for FVII deficiency, 1-3 million for Prothrombin or FXIII deficiency). Acquired Hemophilia A is also a rare bleeding disorder with estimated frequency of 1 in million...
February 14, 2017: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28112377/targeted-introduction-and-effective-expression-of-hfix-at-the-aavs1-locus-in-mesenchymal-stem-cells
#12
Shu-Jun Li, Ying Luo, Le-Meng Zhang, Wei Yang, Guo-Gang Zhang
Hemophilia B occurs due to a deficiency in human blood coagulation factor IX (hFIX). Currently, no effective treatment for hemophilia B has been identified, and gene therapy has been considered the most appropriate treatment. Mesenchymal stem cells (MSCs) have homing abilities and low immunogenicity, and therefore they may be potential cell carriers for targeted drug delivery to lesional tissues. The present study constructed an adeno‑associated virus integration site 1 (AAVS1)‑targeted vector termed AAVS1‑green fluorescent protein (GFP)‑hFIX and a zinc finger nuclease (ZFN) expression vector...
March 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27984605/-genetic-analysis-for-a-family-affected-with-hemophilia-type-a-due-to-a-large-deletion-of-f8-gene
#13
Nan Bai, Shiyue Mei, Ning Liu, Zhenhua Zhao, Jingjing Meng, Xiangdong Kong
OBJECTIVE: To detect potential mutation of F8 gene in a family affected with hemophilia type A. METHODS: Inverse-shifting PCR (IS-PCR), next-generation sequencing (NGS), multiplex ligation-dependent probe amplification (MLPA), and short tandem repeat (STR) assays were used. RESULTS: IS-PCR showed that no inversion of F8 gene has occurred in the family. NGS detected no point mutation or small InDel in the proband, but suggested that the exon 2 of the F8 gene may be deleted...
December 10, 2016: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/27868395/genetic-diagnosis-in-hemophilia-a-from-southern-china-five-novel-mutations-and-one-preimplantation-genetic-analysis
#14
J Chen, J Wang, X Y Lin, Y W Xu, Z H He, H Y Li, S Q Chen, W Y Jiang
INTRODUCTION: As there is currently no complete cure for hemophilia A (HA), the identification of pathogenic mutations in factor VIII (FVIII) gene from HA patients and carriers, which can contribute to genetic counseling prenatal diagnosis, and preimplantation genetic diagnosis (PGD), is an important step to prevent HA. METHODS: A total of 14 unrelated Chinese HA subjects (FVIII activity <40%), 20 carrier subjects, three fetuses, and one PGD were included in this study...
April 2017: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/27863665/biodegradable-hydrophilic-carriers-for-the-oral-delivery-of-hematological-factor-ix-for-hemophilia-b-treatment
#15
Sarena D Horava, Katie J Moy, Nicholas A Peppas
Current protein replacement therapies for hemophilia B, a genetic bleeding disorder caused by a deficiency in coagulation factor IX, rely on IV injections and infusions. Oral delivery of factor IX is a desirable needle-free option, especially for prophylaxis. We have developed a biodegradable, pH-responsive hydrogel microcarrier system based on the poly(methacrylic acid)-grafted-poly(ethylene glycol) [P(MAA-g-EG)]. Incorporation of an enzymatically degradable peptide crosslinking agent allows for site-specific degradation by trypsin in the small intestine...
November 30, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27813214/complications-of-haemophilia-in-babies-first-two-years-of-life-a-report-from-the-centers-for-disease-control-and-prevention-universal-data-collection-system
#16
R Kulkarni, R J Presley, J M Lusher, A D Shapiro, J C Gill, M Manco-Johnson, M A Koerper, T C Abshire, D DiMichele, W K Hoots, P Mathew, D J Nugent, S Geraghty, B L Evatt, J M Soucie
AIM: To describe the prevalence and complications in babies ≤2 years with haemophilia. METHODS: We used a standardized collection tool to obtain consented data on eligible babies aged ≤2 years with haemophilia enrolled in the Centers for Disease Control and Prevention Universal Data Collection System surveillance project at US Hemophilia Treatment Centers (HTCs). RESULTS: Of 547 babies, 82% had haemophilia A, and 70% were diagnosed within one month of birth...
March 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/27812259/genotyping-of-intron-inversions-and-point-mutations-in-exon-14-of-the-fviii-gene-in-iranian-azeri-turkish-families-with-hemophilia-a
#17
Mahmoud Shekari Khaniani, Abdollah Ebrahimi, Setareh Daraei, Sima Mansoori Derakhshan
Hemophilia A (HA) is an inherited X-linked bleeding disorder caused by a variety of mutations that are distributed throughout the large FVIII gene (F8). The most common mutations in studied populations with severe HA are introns 22 and 1 inversions, gross exon deletions and point mutations in exon 14. The aim of this study was to define the frequency of these common mutations in Iranian population of Azeri Turkish in North West of Iran. Fifty patients with severe HA and forty-three female potential carriers were genotyped by inverse shifting polymerase chain reaction (IS-PCR), long-range PCR, multiplex PCR, and sequencing methods for the detection of Intron 22 and 1 inversions, gross exon deletions, and exon 14 point mutations, respectively...
December 2016: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/27638987/joint-sogc-ccmg-opinion-for-reproductive-genetic-carrier-screening-an-update-for-all-canadian-providers-of-maternity-and-reproductive-healthcare-in-the-era-of-direct-to-consumer-testing
#18
R Douglas Wilson, Isabelle De Bie, Christine M Armour, Richard N Brown, Carla Campagnolo, June C Carroll, Nan Okun, Tanya Nelson, Rhonda Zwingerman, Francois Audibert, Jo-Ann Brock, Richard N Brown, Carla Campagnolo, June C Carroll, Isabelle De Bie, Jo-Ann Johnson, Nan Okun, Melanie Pastruck, Karine Vallée-Pouliot, R Douglas Wilson, Rhonda Zwingerman, Christine Armour, David Chitayat, Isabelle De Bie, Sara Fernandez, Raymond Kim, Josee Lavoie, Norma Leonard, Tanya Nelson, Sherry Taylor, Margot Van Allen, Clara Van Karnebeek
OBJECTIVE: This guideline was written to update Canadian maternity care and reproductive healthcare providers on pre- and postconceptional reproductive carrier screening for women or couples who may be at risk of being carriers for autosomal recessive (AR), autosomal dominant (AD), or X-linked (XL) conditions, with risk of transmission to the fetus. Four previous SOGC- Canadian College of Medical Geneticists (CCMG) guidelines are updated and merged into the current document. INTENDED USERS: All maternity care (most responsible health provider [MRHP]) and paediatric providers; maternity nursing; nurse practitioner; provincial maternity care administrator; medical student; and postgraduate resident year 1-7...
August 2016: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/27596108/genetic-diagnosis-in-hemophilia-and-von-willebrand-disease
#19
REVIEW
Laura L Swystun, Paula D James
Phenotypic assays are first-line in terms of diagnostic testing for inherited bleeding disorders. However, since the characterization of the genes that encode coagulation factors in the 1980s, significant progress has been made in translating this knowledge for diagnostic and therapeutic purposes. For the hemophilias, molecular genetic testing can be used to determine carrier status, establish a prenatal diagnosis and predict the likelihood of inhibitor development or anaphylaxis in response to infused coagulation factor concentrates...
January 2017: Blood Reviews
https://www.readbyqxmd.com/read/27477789/study-of-six-patients-with-complete-f9-deletion-characterized-by-cytogenetic-microarray-role-of-the-sox3-gene-in-intellectual-disability
#20
Y Jourdy, N Chatron, M-L Carage, M Fretigny, S Meunier, C Zawadzki, V Gay, C Negrier, D Sanlaville, C Vinciguerra
Essentials Some hemophilia B (HB) patients with complete F9 deletion present with intellectual disability (ID). We delineate six F9 complete deletions and investigate genotype/phenotype correlation. We identify SOX3 as a candidate gene for ID, acting through haploinsufficiency, in HB patients. All complete F9 deletions in ID patients should be explored with cytogenetic microarrays. SUMMARY: Background Large deletions encompassing both the complete F9 gene and contiguous genes have been detected in patients with severe hemophilia B (HB)...
October 2016: Journal of Thrombosis and Haemostasis: JTH
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