1
|
Reches A, Ofen Glassner V, Goldstein N, Yeshaya J, Delmar G, Portugali E, Hallas T, Weinstein A, Kurolap A, Berkenstadt M, Mantsour T, Abu-Gutstein L, Ries-Levavi L, Reznik-Wolf H, Behar DM, Yaron Y, Pras E, Baris Feldman H. Expanded targeted preconception screening panel in Israel: findings and insights. J Med Genet 2024; 61:783-787. [PMID: 38719349 DOI: 10.1136/jmg-2023-109629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 04/25/2024] [Indexed: 07/21/2024]
Abstract
BACKGROUND We aimed to analyse the efficacy and added value of a targeted Israeli expanded carrier screening panel (IL-ECSP), beyond the first-tier test covered by the Israeli Ministry of Health (IMOH) and the second-tier covered by the Health Maintenance Organisations (HMOs). METHODS A curated variant-based IL-ECSP, tailored to the uniquely diverse Israeli population, was offered at two tertiary hospitals and a major genetics laboratory. The panel includes 1487 variants in 357 autosomal recessive and X-linked genes. RESULTS We analysed 10 115 Israeli samples during an 18-month period. Of these, 6036 (59.7%) were tested as couples and 4079 (40.3%) were singles. Carriers were most frequently identified with mutations in the following genes: GJB2/GJB6 (1:22 allele frequency), CFTR (1:28), GBA (1:34), TYR (1:39), PAH (1:50), SMN1 (1:52) and HEXA (1:56). Of 3018 couples tested, 753 (25%) had no findings, in 1464 (48.5%) only one partner was a carrier, and in 733 (24.3%) both were carriers of different diseases. We identified 79 (2.6%) at-risk couples, where both partners are carriers of the same autosomal recessive condition, or the female carries an X-linked disease. Importantly, 48.1% of these would not have been detected by ethnically-based screening tests currently provided by the IMOH and HMOs, for example, variants in GBA, TYR, PAH and GJB2/GJB6. CONCLUSION This is the largest cohort of targeted ECSP testing, tailored to the diverse Israeli population. The IL-ECSP expands the identification of couples at risk and empowers their reproductive choices. We recommend endorsing an expanded targeted panel to the National Genetic Carrier Screening programme.
Collapse
Affiliation(s)
- Adi Reches
- The Genetics Institute and Genomics Center, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
- Department of Obstetrics and Gynecology, Lis Maternity Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Vered Ofen Glassner
- The Genetics Institute and Genomics Center, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Nurit Goldstein
- The Danek Gertner Institute of Human Genetics, Sheba Medical Center, Tel-Hashomer, Ramat Gan, Israel
| | - Josepha Yeshaya
- American Medical Genetics (AMG) Laboratory, Herzliya, Israel
| | | | | | | | - Amit Weinstein
- The Genetics Institute and Genomics Center, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Alina Kurolap
- The Genetics Institute and Genomics Center, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Michal Berkenstadt
- The Danek Gertner Institute of Human Genetics, Sheba Medical Center, Tel-Hashomer, Ramat Gan, Israel
- Faculty of Medical and Health Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Tal Mantsour
- American Medical Genetics (AMG) Laboratory, Herzliya, Israel
| | - Liat Abu-Gutstein
- The Danek Gertner Institute of Human Genetics, Sheba Medical Center, Tel-Hashomer, Ramat Gan, Israel
| | - Liat Ries-Levavi
- The Danek Gertner Institute of Human Genetics, Sheba Medical Center, Tel-Hashomer, Ramat Gan, Israel
| | - Haike Reznik-Wolf
- The Danek Gertner Institute of Human Genetics, Sheba Medical Center, Tel-Hashomer, Ramat Gan, Israel
- Faculty of Medical and Health Sciences, Tel Aviv University, Tel Aviv, Israel
| | | | - Yuval Yaron
- The Genetics Institute and Genomics Center, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
- Faculty of Medical and Health Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Elon Pras
- The Danek Gertner Institute of Human Genetics, Sheba Medical Center, Tel-Hashomer, Ramat Gan, Israel
- Faculty of Medical and Health Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Hagit Baris Feldman
- The Genetics Institute and Genomics Center, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
- Faculty of Medical and Health Sciences, Tel Aviv University, Tel Aviv, Israel
| |
Collapse
|
2
|
Yi H, Trivedi MS, Crew KD, Schechter I, Appelbaum P, Chung WK, Allegrante JP, Kukafka R. Understanding Social, Cultural, and Religious Factors Influencing Medical Decision-Making on BRCA1/2 Genetic Testing in the Orthodox Jewish Community. Public Health Genomics 2024; 27:57-67. [PMID: 38402864 DOI: 10.1159/000536391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 01/10/2024] [Indexed: 02/27/2024] Open
Abstract
INTRODUCTION Although the prevalence of a pathogenic variant in the BRCA1 and BRCA2 genes is about 1:400 (0.25%) in the general population, the prevalence is as high as 1:40 (2.5%) among the Ashkenazi Jewish population. Despite cost-effective preventive measures for mutation carriers, Orthodox Jews constitute a cultural and religious group that requires different approaches to BRCA1 and BRCA2 genetic testing relative to other groups. This study analyzed a dialog of key stakeholders and community members to explore factors that influence decision-making about BRCA1 and BRCA2 genetic testing in the New York Orthodox Jewish community. METHODS Qualitative research methods, based on Grounded Theory and Narrative Research, were utilized to analyze the narrative data collected from 49 key stakeholders and community members. A content analysis was conducted to identify themes; inter-rater reliability was 71%. RESULTS Facilitators of genetic testing were a desire for preventive interventions and education, while barriers to genetic testing included negative emotions, feared impact on family/romantic relationships, cost, and stigma. Views differed on the role of religious leaders and healthcare professionals in medical decision-making. Education, health, and community were discussed as influential factors, and concerns were expressed about disclosure, implementation, and information needs. CONCLUSION This study elicited the opinions of Orthodox Jewish women (decision-makers) and key stakeholders (influencers) who play critical roles in the medical decision-making process. The findings have broad implications for engaging community stakeholders within faith-based or culturally distinct groups to ensure better utilization of healthcare services for cancer screening and prevention designed to improve population health.
Collapse
Affiliation(s)
- Haeseung Yi
- Department of Health Studies and Applied Educational Psychology, Teachers College, Columbia University, New York, New York, USA,
| | - Meghna S Trivedi
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York, USA
- Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, New York, USA
| | - Katherine D Crew
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York, USA
- Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, New York, USA
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Isaac Schechter
- Achieve Behavioral Health, Monsey, New York, USA
- Institute for Applied Research and Community Collaboration (ARCC), Spring Valley, New York, USA
| | - Paul Appelbaum
- Department of Psychiatry, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York, USA
- Center for Law, Ethics and Psychiatry, New York State Psychiatric Institute, New York, New York, USA
| | - Wendy K Chung
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York, USA
- Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, New York, USA
- Department of Pediatrics, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York, USA
| | - John P Allegrante
- Department of Health Studies and Applied Educational Psychology, Teachers College, Columbia University, New York, New York, USA
- Department of Sociomedical Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Rita Kukafka
- Department of Sociomedical Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
- Department of Biomedical Informatics, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York, USA
| |
Collapse
|
3
|
Grant M, Kabakian-Khasholian T, Yazbek S. Interventions addressing genetic disease burdens within selected countries in the MENA region: a scoping review. J Community Genet 2023; 14:29-39. [PMID: 36692811 PMCID: PMC9947218 DOI: 10.1007/s12687-023-00633-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 01/13/2023] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND The MENA region is disproportionately affected by genetic disease. The aim of this research is to scope the region for evidence of genetic services and public health interventions to identify geographic gaps, and to provide a descriptive overview of interventions to identify knowledge gaps. METHODS This study is conducted as a scoping review and follows the Arksey & O'Malley scoping review framework. RESULTS Seventy-six articles spanning 16 MENA nations met inclusion criteria. Studies included interventions in the form of genetic service provision (n=28), as well as comprehensive programs including pilot programs (n=7), community-based genetics programs (n=6) national-level prevention programs (n=18), and national-level mandatory programs (n=17). CONCLUSIONS There is an imbalanced response to genetic disease burdens across the MENA region. More research is warranted where interventions are scarce, particularly to inform development of pilot community-based programs. There is also a need for better monitoring and evaluation of existing nation-wide programs.
Collapse
Affiliation(s)
- Madison Grant
- Faculty of Health Sciences, American University of Beirut, Beirut, Lebanon
| | | | - Soha Yazbek
- Department of Biochemistry and Molecular Genetics, Faculty of Medicine, American University of Beirut, Beirut, Lebanon.
| |
Collapse
|
4
|
Barlow-Stewart K, Bardsley K, Elan E, Fleming J, Berman Y, Fleischer R, Recsei K, Goldberg D, Tucker J, Burnett L. Evaluating the model of offering expanded genetic carrier screening to high school students within the Sydney Jewish community. J Community Genet 2021; 13:121-131. [PMID: 34846685 PMCID: PMC8799788 DOI: 10.1007/s12687-021-00567-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 11/15/2021] [Indexed: 10/31/2022] Open
Abstract
Programs offering reproductive genetic carrier screening (RGCS) to high school students within the Ashkenazi Jewish community in several countries including Canada and Australia have demonstrated high uptake and retention of educational messages over time. This study was undertaken to evaluate whether testing for an expanded number of conditions in a high school setting would impact the effectiveness of education. In this questionnaire-based study, genetic carrier testing for nine conditions was offered to 322 year 11 students from five high schools, with students attending a compulsory 1-h education session prior to voluntary testing. Comparison of pre- and post-education measures demonstrated a significant increase in knowledge, positive attitudes, and reduced concern immediately after the education session. Retention of knowledge, measures of positive attitude, and low concern over a 12-month period were significantly higher than baseline, although there was some reduction over time. In total, 77% of students exhibited informed choice regarding their intention to test. A significant increase in baseline knowledge scores and positive attitude was also demonstrated between our original 1995 evaluation (with testing for only one condition) and 2014 (testing for nine conditions) suggesting community awareness and attitudes to RGCS have increased. These findings validate the implementation of effective education programs as a key component of RGCS and are relevant as gene panels expand with the introduction of genomic technologies.
Collapse
Affiliation(s)
- Kristine Barlow-Stewart
- Northern Clinical School, Faculty of Medicine and Health, University of Sydney, St Leonards, NSW, 2065, Australia.,Community Genetics Program (NSW), Wolper Jewish Hospital, Woollahra, NSW, 2025, Australia
| | - Kayley Bardsley
- Northern Clinical School, Faculty of Medicine and Health, University of Sydney, St Leonards, NSW, 2065, Australia.,Department of Genetic Medicine, Westmead Hospital, Westmead, NSW, 2145, Australia
| | - Elle Elan
- Northern Clinical School, Faculty of Medicine and Health, University of Sydney, St Leonards, NSW, 2065, Australia.,Faculty of Health, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Jane Fleming
- Northern Clinical School, Faculty of Medicine and Health, University of Sydney, St Leonards, NSW, 2065, Australia
| | - Yemima Berman
- Northern Clinical School, Faculty of Medicine and Health, University of Sydney, St Leonards, NSW, 2065, Australia.,Department of Clinical Genetics, Royal North Shore Hospital, St Leonards, NSW, 2065, Australia
| | - Ron Fleischer
- Community Genetics Program (NSW), Wolper Jewish Hospital, Woollahra, NSW, 2025, Australia.,Department of Medical Genomics, Royal Prince Alfred Hospital, Camperdown, NSW, 2010, Australia
| | - Krista Recsei
- Pangolin Consulting, The Entrance, NSW, 2261, Australia
| | - Daniel Goldberg
- Community Genetics Program (NSW), Wolper Jewish Hospital, Woollahra, NSW, 2025, Australia
| | - John Tucker
- Community Genetics Program (NSW), Wolper Jewish Hospital, Woollahra, NSW, 2025, Australia
| | - Leslie Burnett
- Northern Clinical School, Faculty of Medicine and Health, University of Sydney, St Leonards, NSW, 2065, Australia. .,Community Genetics Program (NSW), Wolper Jewish Hospital, Woollahra, NSW, 2025, Australia. .,Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, NSW, 2010, Australia. .,St Vincent's Clinical School, UNSW Sydney, Darlinghurst, NSW, 2010, Australia.
| |
Collapse
|
5
|
Singer A, Sagi-Dain L. Impact of a national genetic carrier-screening program for reproductive purposes. Acta Obstet Gynecol Scand 2020; 99:802-808. [PMID: 32242916 DOI: 10.1111/aogs.13858] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 03/13/2020] [Accepted: 03/23/2020] [Indexed: 01/19/2023]
Abstract
INTRODUCTION The Israeli population, encompassing 9 million citizens, is comprised of diverse communities. The Ministry of Health genetic screening program for reproductive purposes was introduced in 2013. This program is mainly aimed at severe incurable diseases with high rates of infant and childhood morbidity and/or mortality, with a carrier frequency of at least 1:60 and/or a disease frequency of 1 in 15 000 live births. In this paper, we present the results of the national genetic carrier-screening program implementation. MATERIAL AND METHODS Data acquisition for this study was performed by retrospectively searching Ministry of Health database, which includes the reports of 18 genetic laboratories performing genetic screening tests. RESULTS During 2015-2017, a total of 919 820 carrier-screening genetic tests were executed. The overall number rose by 14.9% over these years. For about two-thirds of the presented disorders, carrier frequency was within the expected range. A decrease of 57% was noted in the observed number of patients with spinal muscular atrophy born during 2014-2017, compared with the expected rate. Familial dysautonomia, Canavan and Tay-Sachs diseases yielded a very low prevalence. CONCLUSIONS Our results highlight the impact of a national genetic carrier-screening program. Couples at risk of an affected fetus mostly choose to perform preconception or prenatal diagnosis and to act accordingly. Our country has several characteristics enabling us to achieve this success, including considerable rates of endogamy and consanguineous marriages, increased frequency of founder mutations, and high fertility rates. In addition, wide accessibility of the tests and good compliance of the population must be noted. Still, raising the awareness and continuing education of population and caregivers about the importance and efficiency of carrier screening remains an important issue. Finally, expanding the existing tests into a uniform, wide genetic panel seems to be the next goal.
Collapse
Affiliation(s)
- Amihood Singer
- Community Genetics, Public Health Services, Ministry of Health, Jerusalem, Israel
| | - Lena Sagi-Dain
- Genetics Institute, Carmel Medical Center, Ruth and Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
| |
Collapse
|
6
|
|
7
|
Gabbay E, McCarthy MW, Fins JJ. The Care of the Ultra-Orthodox Jewish Patient. JOURNAL OF RELIGION AND HEALTH 2017; 56:545-560. [PMID: 28102466 DOI: 10.1007/s10943-017-0356-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The Ultra-Orthodox Jewish community embraces a system of values and a rigorous behavioral code that are deeply rooted in religious tradition and history. Here we describe some of the unique challenges that stem from the encounter between modern medical practice and the Ultra-Orthodox world. Through examples of clinical and ethical scenarios ranging from prenatal care to end-of-life decisions, we illustrate problems related to observance of age-old practices in a modern hospital setting, balancing acceptance of Divine will with standard risk assessment, reconciliation of patient autonomy with deference to rabbinic authority and fear of stigma associated with mental illness in a traditional society. We also offer a generalizable model where inquiry precedes pre-formulated judgment to help clinicians provide enhanced care for this population.
Collapse
Affiliation(s)
- Ezra Gabbay
- Hospital Medicine Section, Division of General Internal Medicine, Department of Medicine, Weill-Cornell Medicine, 525 East 68th Street, Box 331, New York, NY, 10065, USA.
| | - Matthew W McCarthy
- Hospital Medicine Section, Division of General Internal Medicine, Department of Medicine, Weill-Cornell Medicine, 525 East 68th Street, Box 331, New York, NY, 10065, USA
| | - Joseph J Fins
- Division of Medical Ethics, Department of Medicine, Weill-Cornell Medicine, New York, NY, USA
| |
Collapse
|
8
|
Lew RM, Burnett L, Proos AL, Delatycki MB. Tay-Sachs disease: current perspectives from Australia. APPLICATION OF CLINICAL GENETICS 2015; 8:19-25. [PMID: 25653550 PMCID: PMC4309774 DOI: 10.2147/tacg.s49628] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Tay-Sachs disease (TSD) is a fatal, recessively inherited neurodegenerative condition of infancy and early childhood. Although rare in most other populations, the carrier frequency is one in 25 in Ashkenazi Jews. Australian high-school-based TSD preconception genetic screening programs aim to screen, educate, and optimize reproductive choice for participants. These programs have demonstrated high uptake, low psychological morbidity, and have been shown to result in fewer than expected Jewish TSD-affected births over 18 years of operation. The majority of Jewish individuals of reproductive age outside of the high school screening program setting in Australia have not accessed screening. Recent recommendations advocate supplementing the community high school screening programs with general practitioner- and obstetrician-led genetic screening of Ashkenazi Jewish individuals for TSD and other severe recessive diseases for which this group is at risk. Massively parallel DNA sequencing is expected to become the testing modality of choice over the coming years.
Collapse
Affiliation(s)
- Raelia M Lew
- Department of Obstetrics and Gynecology, QEII Research Institute for Mothers and Infants, The University of Sydney, Australia ; Department of Obstetrics and Gynaecology, Dentistry and Health Sciences, Faculty of Medicine, The University of Melbourne, Melbourne, Australia
| | - Leslie Burnett
- NSW Health Pathology North, Royal North Shore Hospital, St Leonards, Australia ; SEALS, Prince of Wales Hospital, Randwick, Australia ; Sydney Medical School-Northern, Royal North Shore Hospital E25, University of Sydney, Sydney, Australia
| | - Anné L Proos
- NSW Health Pathology North, Royal North Shore Hospital, St Leonards, Australia
| | - Martin B Delatycki
- Department of Clinical Genetics, Austin Health, Heidelberg, Australia ; Bruce Lefroy Centre for Genetic Health Research, Murdoch Childrens Research Institute, Parkville, Australia
| |
Collapse
|
9
|
Navarro de Souza A, Groleau D, Loiselle CG, Foulkes WD, Wong N. Cultural aspects of healthy BRCA carriers from two ethnocultural groups. QUALITATIVE HEALTH RESEARCH 2014; 24:665-681. [PMID: 24692182 DOI: 10.1177/1049732314528756] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We explored the experiences of Ashkenazi Jewish and French Canadian women and meanings attributed to their hereditary breast and ovarian cancer (HBOC) risk. We purposively sampled 40 BRCA1 or BRCA2 (BRCA) mutation carriers and conducted theoretically driven semistructured interviews. According to content analysis, participants from these two ethnocultural groups held divergent meanings associated with being a BRCA carrier and different views pertaining to the illness experience and risk awareness. All participants identified a genetic basis; however, the French Canadian women also expressed other causes. The French Canadian women reported not knowing other carriers in their social environment, whereas the Ashkenazi Jewish women emphasized a strong sense of community contributing to their ethnic risk awareness. Based on these findings, we suggest that French Canadian women could benefit from greater awareness of the HBOC genetic risk and that health care providers should consider ethnically related and individual-based experiences and meanings during counseling.
Collapse
|
10
|
Abstract
Biochemical testing of hexosaminidase A (HexA) enzyme activity has been available for decades and has the ability to detect almost all Tay-Sachs disease (TSD) carriers, irrespective of ethnic background. This is increasingly important, as the gene pool of those who identify as Ashkenazi Jewish is diversifying. Here we describe the analysis of a cohort of 4,325 individuals arising from large carrier screening programs and tested by the serum and/or platelet HexA enzyme assays and by targeted DNA mutation analysis. Our results continue to support the platelet assay as a highly effective method for TSD carrier screening, with a low inconclusive rate and the ability to detect possible disease-causing mutation carriers that would have been missed by targeted DNA mutation analysis. Sequence analysis performed on one such platelet assay carrier, who had one non-Ashkenazi Jewish parent, identified the amino acid change Thr259Ala (A775G). Based on crystallographic modeling, this change is predicted to be deleterious, as threonine 259 is positioned proximal to the HexA alpha subunit active site and helps to stabilize key residues therein. Accordingly, if individuals are screened for TSD in broad-based programs by targeted molecular testing alone, they must be made aware that there is a more sensitive and inexpensive test available that can identify additional carriers. Alternatively, the enzyme assays can be offered as a first tier test, especially when screening individuals of mixed or non-Jewish ancestry.
Collapse
|
11
|
Scott SA, Edelmann L, Liu L, Luo M, Desnick RJ, Kornreich R. Experience with carrier screening and prenatal diagnosis for 16 Ashkenazi Jewish genetic diseases. Hum Mutat 2010; 31:1240-50. [PMID: 20672374 DOI: 10.1002/humu.21327] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The success of prenatal carrier screening as a disease prevention strategy in the Ashkenazi Jewish (AJ) population has driven the expansion of screening panels as disease-causing founder mutations have been identified. However, the carrier frequencies of many of these mutations have not been reported in large AJ cohorts. We determined the carrier frequencies of over 100 mutations for 16 recessive disorders in the New York metropolitan area AJ population. Among the 100% AJ-descended individuals, screening for 16 disorders resulted in ∼1 in 3.3 being a carrier for one disease and ∼1 in 24 for two diseases. The carrier frequencies ranged from 0.066 (1 in 15.2; Gaucher disease) to 0.006 (1 in 168; nemaline myopathy), which averaged ∼15% higher than those for all screenees. Importantly, over 95% of screenees chose to be screened for all possible AJ diseases, including disorders with lower carrier frequencies and/or detectability. Carrier screening also identified rare individuals homozygous for disease-causing mutations who had previously unrecognized clinical manifestations. Additionally, prenatal testing results and experience for all 16 disorders (n = 574) are reported. Together, these data indicate the general acceptance, carrier frequencies, and prenatal testing results for an expanded panel of 16 diseases in the AJ population.
Collapse
Affiliation(s)
- Stuart A Scott
- Department of Genetics and Genomic Sciences, Mount Sinai School of Medicine of New York University, New York, NY 10029, USA
| | | | | | | | | | | |
Collapse
|
12
|
Ioannou L, Massie J, Lewis S, Petrou V, Gason A, Metcalfe S, Aitken MA, Bankier A, Delatycki MB. Evaluation of a multi-disease carrier screening programme in Ashkenazi Jewish high schools. Clin Genet 2010; 78:21-31. [PMID: 20597919 DOI: 10.1111/j.1399-0004.2010.01459.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A screening programme for Tay Sachs disease (TSD) carrier status was introduced in high schools in Victoria, Australia in 1997, and was expanded to screen for six other genetic conditions common in the Ashkenazi Jewish population in 2008. The aim of this study was to evaluate the current programme and compare it with an evaluation of the programme when screening was offered for TSD alone. All students from Jewish high schools in Melbourne who offered the programme in 2009 were invited to participate in the study. A purpose-designed questionnaire explored the following domains: knowledge (disease and genetics), reasons for screening, anxiety, and predicted negative feelings if found to be a carrier. Two hundred and seventy-three students were offered screening, and 272 (99.6%) completed the questionnaire. Only two students chose not to have screening. Two hundred and seventy-one students were in the penultimate year of high school (99.6%) and 222 were of Ashkenazi Jewish descent (82.5%). The main reasons for choosing screening were the desire to know carrier status and convenience. Knowledge level decreased and negative feelings increased in the current cohort compared to that when screening was offered for TSD alone. We conclude that the current programme is efficient, although increasing the number of conditions resulted in a decrease in knowledge and increase in predicted negative feelings if found to be a carrier of one of the conditions. This has implications for multi-disease screening programmes that will increase in frequency as more conditions can be screened for and costs diminish.
Collapse
Affiliation(s)
- L Ioannou
- Bruce Lefroy Centre for Genetic Health Research, Murdoch Childrens Research Institute, Parkville, Victoria, Australia
| | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Lewis C, Skirton H, Jones R. Can we make assumptions about the psychosocial impact of living as a carrier, based on studies assessing the effects of carrier testing? J Genet Couns 2010; 20:80-97. [PMID: 20878544 DOI: 10.1007/s10897-010-9327-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Accepted: 09/01/2010] [Indexed: 01/09/2023]
Abstract
Receiving the results of genetic carrier testing may have an impact on the psychosocial health of the individual. Numerous studies have been conducted to assess the psychosocial effects of carrier status for a range of conditions. To systematically review research focused on the psychological and social impact of carrier testing on individuals in order to identify factors affecting the impact of carrier testing results, and discern areas where further research is needed. Twenty relevant papers meeting criteria for inclusion in this review were found. The main themes identified across these studies included: anxiety, guilt and stigmatization, effect on family relationships, effect on self image, active coping mechanisms and reproductive issues. Variables related to the psychosocial effect of carrier testing included whether the carrier has an affected child, mode of inheritance, genetic counseling, and life stage. A key finding concerns carriers who already have an affected child; they are more likely to experience guilt and self-blame, and change their reproductive plans compared to carriers without affected children. Additionally, some participants reported clinical features of the disorder for which they were being tested. Genetic counselors may erroneously assume that parents with affected children are aware of their own carrier status in the absence of testing, and they may offer inadequate support. Additionally, counselors should attempt to address patient misconceptions related to their health and carrier status.
Collapse
Affiliation(s)
- Celine Lewis
- Genetic Alliance UK, Unit 4D Leroy House, 436 Essex Road, London, UK.
| | | | | |
Collapse
|
14
|
Affiliation(s)
- Guy Rosner
- The Genetic Institute, Tel-Aviv Sourasky Medical Center;
| | - Serena Rosner
- The Genetic Institute, Tel-Aviv Sourasky Medical Center;
| | - Avi Orr-Urtreger
- The Genetic Institute, Tel-Aviv Sourasky Medical Center;
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel;
| |
Collapse
|
15
|
Population programs for the detection of couples at risk for severe monogenic genetic diseases. Hum Genet 2009; 126:247-53. [DOI: 10.1007/s00439-009-0669-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2008] [Accepted: 04/08/2009] [Indexed: 10/20/2022]
|
16
|
Raz AE, Vizner Y. Carrier matching and collective socialization in community genetics: Dor Yeshorim and the reinforcement of stigma. Soc Sci Med 2008; 67:1361-9. [DOI: 10.1016/j.socscimed.2008.07.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2008] [Indexed: 10/21/2022]
|
17
|
Bach G, Zeigler M, Zlotogora J. Prevention of lysosomal storage disorders in Israel. Mol Genet Metab 2007; 90:353-7. [PMID: 17178249 DOI: 10.1016/j.ymgme.2006.11.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2006] [Accepted: 11/01/2006] [Indexed: 11/24/2022]
Abstract
Prevention programs for the detection of heterozygotes of relatively prevalent autosomal recessive diseases in various ethnic groups are available in recent years in Israel. Several lysosomal storage disorders (LSD) are included in this program. The goal of the program is the ascertainment of high risk couples before the birth of affected offspring. This is performed by a population screening program that addresses the specific needs and requirements of various population groups in Israel. The programs are supervised and designed by medical/clinical geneticists and are accompanied by genetic counseling prior to and after testing. Three types of population screening programs are in operation. The first type is offered to the general population and is directed to premarital and married couples. High risk families mostly opt for prenatal diagnosis. The second type is performed for diseases with a frequency of about 1:1000. This occurrence is common in Israel only in various Arab communities due to the high rate of consanguinity. The third type is a premarital screening performed by the Orthodox Jewish community and is operated by a nonprofit organization--"Dor Yeshorim". Two heterozygotes for a particular disease are advised not to proceed with the marriage and thus avoid the dilemma of prenatal diagnosis. Founder mutations of the relevant genes for each ethnic group are tested and the testing is tailored for each individual according to his/her ethnic background. Genetic counseling presents family planning options to high risk couples. These programs have resulted in a significant reduction in the birth of affected patients of the tested LSD a well as other recessive diseases in recent years.
Collapse
Affiliation(s)
- Gideon Bach
- Department of Human Genetics, Hadassah Hebrew University Hospital, Jerusalem 91120, Israel.
| | | | | |
Collapse
|
18
|
Frumkin A, Zlotogora J. Genetic screening for reproductive purposes at school: Is it a good strategy? Am J Med Genet A 2007; 146A:264-9. [DOI: 10.1002/ajmg.a.32069] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
19
|
Scriver CR. Community genetics and dignity in diversity in the Quebec Network of Genetic Medicine. Public Health Genomics 2006; 9:142-52. [PMID: 16741343 DOI: 10.1159/000092650] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The Quebec Network of Genetic Medicine (QNGM), implemented in 1971, has been an integrated program of community genetics serving the population (approximately 7.5 million) of Quebec province in Canada. QNGM reported to the Minister of Social Affairs and operated under an umbrella of universal health insurance in the province. The Network's programs have been run by members of the four university medical schools of the province under the direction of a central committee. A global annual budget was awarded to QNGM from its inception. Among its many programs, QNGM supported: (1) two newborn screening programs (using blood and urine samples) for early diagnosis, treatment and research in phenylketonuria, hereditary tyrosinemia, congenital hypothyroidism, and in a large number of other hereditary metabolic diseases; (2) follow-up of confirmatory diagnostic tests at regional centers, followed by supervision of ambulatory treatment modalities; (3) carrier screening and reproductive counseling for Tay-Sachs and beta-thalassemia diseases; (4) a spectrum of feasibility (research) studies (e.g., screening for biotinidase deficiency, neuroblastoma, hemoglobinopathies, and cystic fibrosis) to inform policy decisions. QNGM performed economic analyses of its major programs and followed prevailing ethical guidelines. Its global budget and integrated structure terminated in 1994, although some of its programs continue independently.
Collapse
Affiliation(s)
- Charles R Scriver
- Department of Biology, Faculties of Science and Medicine, McGill University, Montreal, Canada.
| |
Collapse
|
20
|
Prainsack B, Firestine O. Genetically modified survival: red and green biotechnology in Israel. SCIENCE AS CULTURE 2005; 14:355-72. [PMID: 16619470 DOI: 10.1080/09505430500369111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Affiliation(s)
- Barbara Prainsack
- Department of Political Science, University of Vienna, Universitaetsstrasse 7, A-1010 Wein, Austria.
| | | |
Collapse
|
21
|
Gurwitz D. Workshop Abstracts. Per Med 2005; 2:145-185. [PMID: 29788588 DOI: 10.1517/17410541.2.2.145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The first and crucial step in sensory processing, the transduction of stimuli, such as odor, light and sound, into a cellular response, are all regulated by genetic pathways. The past years have provided a significant increase in our understanding of some of these pathways, due in large part to the genes found to be associated with inherited hearing loss (HL).
Collapse
Affiliation(s)
- David Gurwitz
- Department of Human Genetics and Molecular Medicine, Tel-Aviv University, Faculty of Medicine,Tel-Aviv 69978, Israel. E-mail: gurwitz@ post.tau.ac.il
| |
Collapse
|
22
|
Ekstein J, Rubin BY, Anderson SL, Weinstein DA, Bach G, Abeliovich D, Webb M, Risch N. Mutation frequencies for glycogen storage disease Ia in the Ashkenazi Jewish population. Am J Med Genet A 2005; 129A:162-4. [PMID: 15316959 DOI: 10.1002/ajmg.a.30232] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Glycogen storage disease type Ia (GSDIa) is a severe autosomal recessive disorder caused by deficiency of the enzyme D-glucose-6-phosphatase (G6Pase). While numerous mutations have been found in cosmopolitan European populations, Ashkenazi Jewish (AJ) patients appear to primarily carry the R83C mutation, but possibly also the Q347X mutation found generally in Caucasians. To determine the frequency for both these mutations in the AJ population, we tested 20,719 AJ subjects for the R83C mutation and 4,290 subjects for the Q347X mutation. We also evaluated the mutation status of 30 AJ GSDIa affected subjects. From the carrier screening, we found 290 subjects with R83C, for a carrier frequency for this mutation of 1.4%. This carrier frequency translates into a predicted disease prevalence of 1 in 20,000, five times higher than for the general Caucasian population, confirming a founder effect and elevated frequency of GSDIa in the AJ population. We observed no carriers of the Q347X mutation. Among the 30 GSDIa affected AJ subjects, all were homozygous for R83C. These results indicate that R83C is the only prevalent mutation for GSDIa in the Ashkenazi population.
Collapse
Affiliation(s)
- Josef Ekstein
- Dor Yeshorim, The Committee for the Prevention of Jewish Genetic Diseases, Brooklyn, New York, USA.
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Rund D, Filon D, Jackson N, Asher N, Oron-Karni V, Sacha T, Czekalska S, Oppenheim A. An unexpectedly high frequency of heterozygosity for alpha-thalassemia in Ashkenazi Jews. Blood Cells Mol Dis 2005; 33:1-3. [PMID: 15223003 DOI: 10.1016/j.bcmd.2004.04.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2004] [Revised: 04/20/2004] [Indexed: 11/25/2022]
Abstract
alpha-Thalassemia is among the world's most common single gene disorders, which is most prevalent in the malaria belt. This geographic distribution has been attributed to a selective advantage of heterozygotes against this disease. Unexpectedly, we have found a high frequency of heterozygosity for deletional alpha-thalassemia (-alpha3.7) in Ashkenazi Jews (carrier frequency of 7.9%, allele frequency of 0.04). This population has resided in temperate climates for many centuries and was therefore not subjected to malarial selection pressure. In comparison, heterozygosity for beta-thalassemia, which is highly subject to malarial selection pressure, is very low (estimated <0.1%) in this group. It is possible that founder effect and genetic drift have contributed to the high frequency of deletional alpha-thalassemia in Ashkenazim, as may occur in closed populations. Alternatively, we hypothesize that positive selection pressure for an as yet unknown linked allele on chromosome 16 may be a significant factor leading to this high frequency.
Collapse
Affiliation(s)
- Deborah Rund
- Hematology Department, Hebrew University and Hadassah Medical School, Jerusalem, Israel IL91120.
| | | | | | | | | | | | | | | |
Collapse
|
24
|
Zlotogora J, Barges S. High incidence of profound deafness in an isolated community. GENETIC TESTING 2004; 7:143-5. [PMID: 12885337 DOI: 10.1089/109065703322146849] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In a Muslim Israeli Arab village, different types of hearing loss affect some 2% of the inhabitants. Most cases of profound deafness are due to recessive mutations in the Connexin-26 gene. Since in this community, marriages are by preference within the family (consanguineous), for many of the couples from the village the risk for an affected child is high. There are 30 families living in the village in which both parents have normal hearing and at least one child has a profound hearing defect. In these families, the birth of a child with profound deafness did not change family planning. The rate of marriage was similar for the siblings of deaf children as for other individuals in the village. The major problems were encountered by the deaf individuals themselves; in particular, most of the women were not married. Because of the distinctive nature of this particular problem, different types of screening programs were envisaged. However, all of them are problematic. Therefore, as a first step it was decided to begin a program including individual genetic counseling together with education of the entire population on practical aspects of human genetics.
Collapse
Affiliation(s)
- Joel Zlotogora
- Department of Genetic Community, Public Health Services, Ministry of Health, Sheba Medical Services, Ramat Gan, Israel.
| | | |
Collapse
|
25
|
Raz AE. `Aysha': Genetics Education and Community Engagement in a Consanguineous Arab-Bedouin Population in Israel. Health (London) 2003. [DOI: 10.1177/13634593030074004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
I examine the piloting of an educational tool - an Arabic-speaking documentary film entitled `Aysha' - in a Bedouin community in Israel, where consanguinity increases the prevalence of genetic diseases. Textual analysis of the film's changing script versions demonstrates how the dilemma of modern biomedical goals and local Bedouin tradition was reconciled in the film's narrative. Focus groups conducted with 61 teachers and 40 Bedouin pupils illustrate a split between dependence on family and tradition alongside a positive view of the film's message. Four main topics were covered: authenticity and efficiency; consanguinity; genetic tests and carrier matching; and abortion. The conclusion discusses the film in the broader context of tradition and modernization, gender relations and the complex positioning involved in implementing and evaluating health-related intervention programs.
Collapse
|
26
|
Abstract
INTRODUCTION Abortion is one of the most widely discussed medical-ethical subjects in medical, legal, philosophical, and religious literature as well as in the lay press. There is hardly a religion or country in the world that is not currently concerned about this issue. The complexity of the topic relates to the fact that it deals with a being that is close to us but not identical to us. On the other hand, the fetus is not like a plant or even like a living being in the animal kingdom. Yet the fetus is not a complete and independent human being either. DISCUSSION There are strongly opposing philosophical/religious viewpoints on abortion. On the one hand, pro-life groups and the Roman Catholic Church absolutely oppose abortion. They view the fetus as a full and independent human being, with absolute rights equal to those of the mother. According to this view, the right of the fetus to life can never be disregarded, and abortion is viewed as murder. On the other hand, the permissive, feminist, liberal view, emphasizes the basic right of a woman over her body. This right justifies abortion on demand solely dependent on the woman's wishes at any stage of pregnancy and for any reason whatsoever. This view totally ignores the rights of the fetus and views it as a part of the mother's body. This article deals with some aspects of the approaches of various religions to abortion due to fetal indications, in particular the Jewish viewpoint.
Collapse
Affiliation(s)
- Avraham Steinberg
- Department of Pediatrics, Shaare Zedek Medical Center, POB 3235, 91031 Jerusalem, Israel.
| |
Collapse
|
27
|
Raz AE, Atar M. Nondirectiveness and Its Lay Interpretations: The Effect of Counseling Style, Ethnicity and Culture on Attitudes Towards Genetic Counseling Among Jewish and Bedouin Respondents in Israel. J Genet Couns 2003; 12:313-32. [PMID: 14682356 DOI: 10.1023/a:1023901005451] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
To evaluate the effects of ethnicity, culture, and counseling style on the interpretation of nondirectiveness in genetic counseling, a questionnaire containing premarital and prenatal case vignettes in two versions (pessimistic/optimistic) was administered to 281 Jewish and 133 Bedouin respondents. The first study population was comprised of Jewish students enrolled in a university and a community college in the Negev (southern part of Israel). The second study population was comprised of Muslim-Bedouin college students from the same area. The majority of Jewish respondents interpreted the nondirective message as intended by counselors, while the majority of Bedouin respondents did not. Counseling style was found to have a statistically significant effect on the interpretation of the general role of counseling. Gender and susceptibility were not found to have a significant effect on interpretation. Group differences are analyzed through a cultural lens in which different interpretive norms can generate expectations for either nondirectiveness or directiveness.
Collapse
Affiliation(s)
- Aviad E Raz
- Department of Behavioral Sciences, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel.
| | | |
Collapse
|
28
|
Gason AA, Sheffield E, Bankier A, Aitken MA, Metcalfe S, Barlow Stewart K, Delatycki MB. Evaluation of a Tay-Sachs disease screening program. Clin Genet 2003; 63:386-92. [PMID: 12752571 DOI: 10.1034/j.1399-0004.2003.00074.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Tay-Sachs Disease (TSD) is an autosomal recessive neurodegenerative disorder. TSD is prevalent in the Ashkenazi Jewish population, and carrier screening programs have been implemented worldwide in these communities. A screening program initiated in 1997 involving the Melbourne Jewish community (Australia) incorporated education, counselling and carrier testing of high-school students aged 15 to 18 years. This study aimed to assess the participation rates, level of knowledge obtained and predicted feelings and attitudes of the students involved. Seven hundred and ten students participated, there was a 67% uptake for testing with a carrier rate of 1 in 28 determined. The level of knowledge of the students following education was high and of relative importance in regard to decision making, as were their feelings and attitudes about genetic testing for carrier status. A significant impediment to test uptake was the need for blood sampling, resulting in a recommendation for the introduction of DNA analysis on cheek brush samples. The evaluation of this program has given a wider scope for further development as well as providing valuable information for the implementation of community screening programs.
Collapse
Affiliation(s)
- A A Gason
- Murdoch Childrens Research Institute and Genetic Health Services Victoria, Royal Children's Hospital, Parkville, Victoria, Australia
| | | | | | | | | | | | | |
Collapse
|
29
|
Risch N, Tang H, Katzenstein H, Ekstein J. Geographic distribution of disease mutations in the Ashkenazi Jewish population supports genetic drift over selection. Am J Hum Genet 2003; 72:812-22. [PMID: 12612865 PMCID: PMC1180346 DOI: 10.1086/373882] [Citation(s) in RCA: 110] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2002] [Accepted: 12/30/2002] [Indexed: 11/04/2022] Open
Abstract
The presence of four lysosomal storage diseases (LSDs) at increased frequency in the Ashkenazi Jewish population has suggested to many the operation of natural selection (carrier advantage) as the driving force. We compare LSDs and nonlysosomal storage diseases (NLSDs) in terms of the number of mutations, allele-frequency distributions, and estimated coalescence dates of mutations. We also provide new data on the European geographic distribution, in the Ashkenazi population, of seven LSD and seven NLSD mutations. No differences in any of the distributions were observed between LSDs and NLSDs. Furthermore, no regular pattern of geographic distribution was observed for LSD versus NLSD mutations-with some being more common in central Europe and others being more common in eastern Europe, within each group. The most striking disparate pattern was the geographic distribution of the two primary Tay-Sachs disease mutations, with the first being more common in central Europe (and likely older) and the second being exclusive to eastern Europe (primarily Lithuania and Russia) (and likely much younger). The latter demonstrates a pattern similar to two other recently arisen Lithuanian mutations, those for torsion dystonia and familial hypercholesterolemia. These observations provide compelling support for random genetic drift (chance founder effects, one approximately 11 centuries ago that affected all Ashkenazim and another approximately 5 centuries ago that affected Lithuanians), rather than selection, as the primary determinant of disease mutations in the Ashkenazi population.
Collapse
Affiliation(s)
- Neil Risch
- Department of Genetics, Stanford University, Standford, CA 94305, USA.
| | | | | | | |
Collapse
|
30
|
Dagan O, Hochner H, Levi H, Raas-Rothschild A, Sagi M. Genetic testing for hearing loss: different motivations for the same outcome. AMERICAN JOURNAL OF MEDICAL GENETICS 2002; 113:137-43. [PMID: 12407703 DOI: 10.1002/ajmg.10676] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The recent discoveries of genes involved in deafness open new options for families and individuals with hearing loss. Our aim was to learn if parents of children with hearing loss will benefit from these new possibilities. A total of 139 parents answered questionnaires aimed at evaluating their intentions as well as their reasons to opt for or against genetic testing and prenatal diagnosis for hearing loss. A very high interest (87%) in genetic testing was found among Israeli Jewish parents of deaf and hard-of-hearing children. Although the Jewish population in Israel is very diverse in its religious beliefs, this high interest was similar across all religious sectors (secular, traditional, orthodox, and ultraorthodox); however, some of the reasons for undertaking such a test were very different between them. Reasons related to family planning and prenatal diagnosis were significantly less important to parents from the ultraorthodox sector, but the possibility to utilize genetic testing for matchmaking the children with hearing loss and their hearing siblings was an important factor in motivating them to undertake the test. Parents from all religious sectors wished testing would shed light on the cause of the hearing loss. We conclude that genetic testing would be welcomed by a wide range of communities, including those that usually do not apply for genetic counseling and testing, if it is offered in accordance with their cultural norms and beliefs.
Collapse
Affiliation(s)
- Orit Dagan
- Department of Human Genetics and Molecular Medicine, Sackler School Medicine, Tel-Aviv University, Tel Aviv, Israel
| | | | | | | | | |
Collapse
|
31
|
Ekstein J, Katzenstein H. The Dor Yeshorim story: community-based carrier screening for Tay-Sachs disease. ADVANCES IN GENETICS 2002; 44:297-310. [PMID: 11596991 DOI: 10.1016/s0065-2660(01)44087-9] [Citation(s) in RCA: 102] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- J Ekstein
- Dor Yeshorim, The Committee for Prevention of Jewish Genetic Diseases Brooklyn, New York, USA
| | | |
Collapse
|
32
|
Zinberg RE, Kornreich R, Edelmann L, Desnick RJ. Prenatal genetic screening in the Ashkenazi Jewish population. Clin Perinatol 2001; 28:367-82. [PMID: 11499058 DOI: 10.1016/s0095-5108(05)70089-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Ashkenazi Jewish community is a unique and ideal population in which to provide multiple disease screening because detection rates are high (> 95%) by testing a limited number of mutations. The residual risk that remains is very low. In addition, the lessons learned from carrier screening in this community indicate that only through genetic counseling and education can screening in the general population gain wide acceptance and provide maximum benefit.
Collapse
Affiliation(s)
- R E Zinberg
- Department of Human Genetics and Center for Jewish Genetic Diseases, Mount Sinai School of Medicine, New York University, New York, New York, USA
| | | | | | | |
Collapse
|
33
|
Bach G, Tomczak J, Risch N, Ekstein J. Tay-Sachs screening in the Jewish Ashkenazi population: DNA testing is the preferred procedure. AMERICAN JOURNAL OF MEDICAL GENETICS 2001; 99:70-5. [PMID: 11170098 DOI: 10.1002/1096-8628(20010215)99:1<70::aid-ajmg1120>3.0.co;2-0] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A unique screening program for the identification of Tay-Sachs Disease (TSD) heterozygotes has been performed in the tradi- tional Orthodox Ashkenazi Jewish (AJ) community since 1983. In recent years the program has utilized the biochemical assay for the determination of hexosaminidase A levels by the heat inactivation technique as well as by direct DNA analysis. The three mutations which were analyzed were those that have been shown to be prevalent among AJ TSD patients and carriers, namely the four nucleotide insertion mutation in exon 11 (1278+TATC), the splice mutation at the 5' end of intron 12 (1421+1g-->c), and the adult mutation, a Gly(269)-->Ser substitution in exon 5 (G269S). A total of 103,133 individuals were tested by biochemical analysis, and 38,197 of them were also assayed by DNA testing. Furthermore, 151 chromosomes from TSD patients or obligate heterozygotes were subjected to DNA analysis for one of the three mutations. DNA testing of the latter identified one of the three AJ mutations in every case, predicting a very high detection rate of heterozygotes in this community by this method. By contrast, the sensitivity of the enzyme assay ranged from 93.1% to 99.1% depending on the exclusion (inclusion) of inconclusive results as positive, while the specificity ranged from 88.1% to 98.8% depending on the inclusion (exclusion) of inconclusive results as positive. Our results strongly support the use of DNA testing alone as the most cost-effective and efficient approach to carrier screening for TSD in individuals of confirmed Ashkenazi Jewish ancestry.
Collapse
Affiliation(s)
- G Bach
- Department of Human Genetics, Hadassah Hebrew University Hospital, Jerusalem 91120, Israel.
| | | | | | | |
Collapse
|
34
|
Phillips KA, Warner E, Meschino WS, Hunter J, Abdolell M, Glendon G, Andrulis IL, Goodwin PJ. Perceptions of Ashkenazi Jewish breast cancer patients on genetic testing for mutations in BRCA1 and BRCA2. Clin Genet 2000; 57:376-83. [PMID: 10852372 DOI: 10.1034/j.1399-0004.2000.570508.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The perceived benefits and risks of genetic testing may vary between groups of individuals with different cultural, demographic, and family history features. This multicentre study examined the factors that influenced the decision to undergo genetic testing for BRCA1 and BRCA2 in Canadian Jewish women with breast cancer. A self-administered questionnaire was developed and distributed to 134 individuals enrolled in a research-based testing program for Ashkenazi women. The questionnaire assessed demographic, social, and family history parameters, and the influence of medical, family, social, psychological, and cultural/religious factors on decision making about genetic testing. Seventy-six percent of women completed the questionnaire. Forty-one percent of study participants had no family history of breast or ovarian cancer. The most important factors influencing the decision to undergo testing were a desire to contribute to research, potential benefit to other family members, curiosity, and the potential for relief if not found to be a carrier (endorsed by 87, 78, 70, and 60% of participants, respectively). The main perceived risks of undergoing genetic testing related to insurance discrimination, confidentiality, accuracy and interpretability of results, potential impact on marriage prospects for family members, and focus on the Jewish community (endorsed by 28, 24, 30, 17, and 14% of participants, respectively). This study provides novel information on the motivating factors for BRCA1 and BRCA2 mutation testing in Canadian women of Ashkenazi Jewish descent. The focus on altruistic factors and those related to perceived psychological benefits of testing is notable.
Collapse
Affiliation(s)
- K A Phillips
- Department of Medical Oncology and Haematology, Princess Margaret Hospital, Toronto, Ontario, Canada.
| | | | | | | | | | | | | | | |
Collapse
|
35
|
Levin M. Screening Jews and genes: a consideration of the ethics of genetic screening within the Jewish community: challenges and responses. GENETIC TESTING 1999; 3:207-13. [PMID: 10464669 DOI: 10.1089/gte.1999.3.207] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Screening for genetic disorders, particularly Tay-Sachs Disease, has been traditionally welcome by the Jewish community. I review the history of genetic screening among Jews and the views from the Jewish tradition on the subject, and then discuss ethical challenges of screening and the impact of historical memories upon future acceptance of screening programs. Some rational principles to guide future design of genetic screening programs among Jews are proposed.
Collapse
Affiliation(s)
- M Levin
- Division of Oncology and Hematology, Brookdale University Hospital and Medical Center, Brooklyn, NY 11212, USA.
| |
Collapse
|
36
|
Foster MW, Eisenbraun AJ, Carter TH. Genetic screening of targeted subpopulations: the role of communal discourse in evaluating sociocultural implications. GENETIC TESTING 1999; 1:269-74. [PMID: 10464656 DOI: 10.1089/gte.1997.1.269] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Targeting socially identifiable subpopulations for genetic screening entails the risk of stigmatizing them. The potential for such harm should be considered before programs are initiated. There is an emerging consensus that targeted subpopulations should be actively involved in evaluating these risks. A process of communal discourse engages the community in discussions that reflect both public and private sociocultural contexts in which individual decisions about screening will be made. This allows the subpopulation to address the collective implications of testing in a culturally appropriate way. Communal discourse was used to evaluate the collective implications of genetic testing in two Native American communities. We found that private social units were more influential than public units in reaching communal consensus, that local sociocultural issues were of more concern than were general issues such as employment and insurance discrimination, and that heterogeneity within a subpopulation may be just as significant a consideration in designing a targeted screening program as diversity between subpopulations. Heterogeneity is constructed by using a dichotomy between community-specific and biomedical health representations and practices. How genetic screening is socially constructed using a community's existing dichotomy may be central to its success.
Collapse
Affiliation(s)
- M W Foster
- Department of Anthropology, University of Oklahoma, Norman 73019, USA.
| | | | | |
Collapse
|
37
|
Kaplan F. Tay-Sachs disease carrier screening: a model for prevention of genetic disease. GENETIC TESTING 1999; 2:271-92. [PMID: 10464605 DOI: 10.1089/gte.1998.2.271] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Tay-Sachs disease (TSD) is an autosomal-recessive, progressive, and ultimately fatal neurodegenerative disorder. Within the last 30 years, the discovery of the enzymatic basis of the disease, namely deficiency of the enzyme hexosaminidase A, made possible both enzymatic diagnosis of TSD and heterozygote identification. In the last decade, the cloning of the HEXA gene and the identification of more than 80 associated TSD-causing mutations has permitted molecular diagnosis in many instances. TSD was the first genetic condition for which community-based screening for carrier detection was implemented. As such, the TSD experience can be viewed as a prototypic effort for public education, carrier testing, and reproductive counseling for avoiding fatal childhood disease. More importantly, the outcome of TSD screening over the last 28 years offers convincing evidence that such an effort can dramatically reduce incidence of the disease.
Collapse
Affiliation(s)
- F Kaplan
- McGill University-Montreal Children's Hospital Research Institute, Quebec, Canada.
| |
Collapse
|
38
|
Abstract
Advances in genetic research make it possible to identify carriers of a growing number of genetic diseases. The World Health Organization (WHO) published several preconditions for community carrier screening. This paper aims to present some of the dilemmas about screening in Israel and the difficulties in following the WHO's helpful criteria. Some of the genetic diseases that are rare in the world are relatively common among several communities in Israel, and one of the dilemmas is for which of them screening is justified. Consensus exists among professionals and among the public about screening for a severe disease like Tay-Sachs, but the justification for screening for a disease with a widely variable expression, like Gaucher disease, is debatable. Another dilemma is whether to offer screening to the general population when the options to solve the problem are still not clear, as is the case of screening for carriers of BRCA1 and BRCA2. The author also explains why geneticists in Israel cooperate with a screening program in the ultra-orthodox community, although it is done according to unusual rules.
Collapse
|
39
|
Levy-Lahad E, Zimran A. Gaucher's disease: genetic counselling and population screening. BAILLIERE'S CLINICAL HAEMATOLOGY 1997; 10:779-92. [PMID: 9497864 DOI: 10.1016/s0950-3536(97)80040-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Genetic counselling for Gaucher's disease requires a comprehensive approach, including accurate diagnosis at both the enzymatic and molecular levels, and assessment of disease severity. These goals are particularly challenging given the great allelic and phenotypic heterogeneity encountered in this disorder. Counselling should address the specific concerns of the counsellee, which may be related to evaluation of an affected person, or to reproductive options in couples at risk. Advances in both diagnosis and treatment have led to increased ascertainment of cases and carriers through population based screening, rather than through affected probands, raising new ethical and medical dilemmas. This chapter outlines practical issues in counselling for the various forms of Gaucher's disease, based on current data and experience.
Collapse
Affiliation(s)
- E Levy-Lahad
- Medical Genetic Services, Shaare-Zedek Medical Center, Jerusalem, Israel
| | | |
Collapse
|
40
|
Abstract
We describe a partially automated DNA mutation assay for detecting the most frequent mutations in the alpha-subunit of beta-hexosaminidase A, the acid beta-glucosidase and the cystic fibrosis transmembrane conductance regulator genes for the Ashkenazi Jewish population. The assay detects carriers for Tay-Sachs disease, Gaucher disease, and cystic fibrosis with sensitivities of at least 92%, 96%, and 97%, respectively. Among 1,364 young adults of Ashkenazic ancestry in the Dor Yeshurim community who were tested, 52 were Tay-Sachs carriers, 110 were Gaucher carriers, and 62 were cystic fibrosis carriers. Ten individuals were carriers for two diseases, and three unsuspected cases were diagnosed with Gaucher disease based on mutation test results. In addition to Tay-Sachs mutation data, results for hexosaminidase A activity were also available. All of 1,254 samples normal by enzyme quantitation were also negative for the three alpha-subunit mutations tested, and all of 43 samples with 'inconclusive' enzyme results were negative by DNA. Only 52 of 67 samples positive by enzyme assay were also positive for one of the three mutations tested for Tay-Sachs disease. The data suggest a high degree of false positivity inherent in enzyme identification of carriers. There are no correlative methods to assess the sensitivity of Gaucher and CF carrier testing. The results show that population screening can be carried out efficiently by DNA analysis, with the accrual of carrier information for three separate diseases conducted as a single test. Furthermore, the DNA method for Tay-Sachs screening appears to exceed the specificity of hexosaminidase A enzyme testing.
Collapse
Affiliation(s)
- J M DeMarchi
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
| | | | | |
Collapse
|
41
|
Abstract
Screening for inherited disease is a preventative health measure that started in the 1960s with the development of programs for the detection of PKU in newborns and that has had a major impact on reducing the burden of disease. Developments in technology have led to the availability of large scale testing for an increasing number of both acquired and genetic disorders. Laboratory testing is only one facet of a screening program and consideration should be given to availability of testing to all individuals, education regarding the program, effectiveness of treatment, long-term benefits both for individuals and society, ethical issues, and cost benefits. In this review, newborn, prenatal, and heterozygote screening are discussed.
Collapse
Affiliation(s)
- F J Bamforth
- Department of Laboratory Medicine and Pathology, University of Alberta Hospitals, Edmonton, Canada
| |
Collapse
|
42
|
Abstract
Recent advances in genetic identification and characterization of a number or hereditary disorders have led to increased possibilities for genetic testing and screening. The context and methods of screening are important given that identification of otherwise healthy persons as being presymptomatic or at increased risk for genetic diseases may have serious consequences for their future lifestyle, employment, and insurability. This article examines general principles for genetic screening, including goals, delivery issues, and professional and lay responses to screening and counseling, and recommends areas in which social psychological research on screening is needed.
Collapse
|