Homozygous variant in TKFC abolishing triokinase activities is associated with isolated immunodeficiency.

BACKGROUND: Triokinase and FMN cyclase (TKFC) is a bifunctional enzyme involved in fructose metabolism. Triokinase catalyses the phosphorylation of fructose-derived glyceraldehyde (GA) and exogenous dihydroxyacetone (DHA), while FMN cyclase generates cyclic FMN. TKFC regulates the antiviral immune response by interacting with IFIH1 (MDA5). Previously reported pathogenic variants in TKFC are associated with either a multisystemic disease or isolated hypotrichosis with loose anagen hairs. METHODS: Whole-exome sequencing identified a homozygous novel variant in TKFC (c.1624G>A; p.Gly542Arg) in an individual with a complex primary immunodeficiency disorder. The variant was characterised using enzymatic assays and yeast studies of mutant recombinant proteins. RESULTS: The individual presented with chronic active Epstein-Barr virus disease and multiple bacterial and viral infections. Clinical investigations revealed hypogammaglobulinaemia, near absent natural killer cells and decreased memory B cells. Enzymatic assays showed that this variant displayed defective DHA and GA kinase activity while maintaining FMN cyclase activity. An allogenic bone marrow transplantation corrected the patient's immunodeficiency. CONCLUSION: Our report suggests that TKFC may have a role in the immunological system. The pathological features associated with this variant are possibly linked with DHA/GA kinase inactivation through a yet an unknown mechanism. This report thus adds a possible new pathway of immunometabolism to explore further.

A qualitative study of women and partners from Lebanon and Quebec regarding an expanded scope of noninvasive prenatal testing.

BACKGROUND: In the near future, developments in non-invasive prenatal testing (NIPT) may offer couples the opportunity to expand the range of genetic conditions tested with this technology. This possibility raises a host of ethical and social concerns, such as the type of information (medical vs. non-medical information) that couples might be exposed to and how this might complicate their informed decision-making. Currently, only limited research, mainly carried out in western countries, was conducted on women's and partners' views regarding the potential expansion of NIPT. METHODS: This study used semi-structured interviews with pregnant women and their partners to explore their views on future potential NIPT applications such as non-medical sex selection and non-medical traits, paternity testing, and NIPT use for fetal whole genome sequencing (FWGS). It was conducted in Lebanon and Quebec, as case studies to explore the impact of cultural differences on these views. RESULTS: We found no differences and many similarities when comparing the perceptions of participants in both contexts. While couples in both settings disapproved of the use of NIPT for non-medical sex selection and non-medical traits such as physical characteristics, they were near-unanimous about their support for its use for paternity testing in specific cases, such as legal doubts or conflicts related to the identity of the father. Participants were more ambivalent about NIPT for Fetal Whole Genome Sequencing. They supported this use to detect conditions that would express at birth or early childhood, while objecting to testing for adult-onset conditions. CONCLUSIONS: These results can further inform the debate on the future uses of NIPT and future policy related its implementation.

The value of non-invasive prenatal testing: preferences of Canadian pregnant women, their partners, and health professionals regarding NIPT use and access.

BACKGROUND: Canadian policies regarding the implementation and public coverage of non-invasive prenatal testing (NIPT) are heterogeneous and shifting, with NIPT being publicly covered for high-risk pregnancies in some provinces, but not others. Such a diverse and evolving policy landscape provides fertile ground for examining the preferences of pregnant women, their partners, and health professionals regarding the implementation and coverage of NIPT by the public healthcare system, as well as the factors influencing their preferences, which is what the present study does. METHODS: In this paper, we report the results of three-large scale Canadian surveys, in which 882 pregnant women, 395 partners of pregnant women, and 184 healthcare professionals participated. RESULTS: The paper focuses on preferences regarding how and when NIPT should be used, as well as the factors influencing these preferences, and how coverage for NIPT should be provided. These are correlated with respondents' levels of knowledge about Down syndrome and testing technologies and with their stated intended use of NIPT results. CONCLUSION: Salient is the marked difference between the preferences of prospective parents and those of healthcare professionals, which has potential implications for Canadian policy regarding NIPT implementation and insurance coverage.

Canadian Pregnant Women's Preferences Regarding NIPT for Down Syndrome: The Information They Want, How They Want to Get It, and With Whom They Want to Discuss It.

OBJECTIVE: This study sought to assess Canadian pregnant women's and their partners' preferences for information about non-invasive prenatal testing (NIPT). METHODS: Pregnant women and their partners across Canada were surveyed as part of the Personalized Genomics for prenatal Aneuploidy Screening Using maternal blood (PEGASUS) study. RESULTS: A total of 882 pregnant women and 395 partners participated. Women preferred being informed by a physician (77.2%). They preferred getting information ahead of time, except for information about resources for families with Down syndrome, which they preferred getting with test results. More than half thought that written consent is important (63.7%) and could decide whether to do NIPT on the day they received the information (54.9%). Women preferred to be informed of results by telephone (43.7%) or in person (28%), but they preferred in person if they were considered at high risk for Down syndrome on the basis of the results (76%). The partner was the person whose input was considered most important (62.6%). Partners' preferences were similar, except that partners tended to want information later (at the time of the test or with the results) and felt that their opinion was not considered as highly by health professionals. CONCLUSION: Canadian women want information about NIPT early, in person, by a knowledgeable physician. Partners also want to be informed and involved in the decision-making process.

Views of Canadian healthcare professionals on the future uses of non-invasive prenatal testing: a mixed method study.

Non-invasive prenatal testing's (NIPT) potential to screen for a wide range of conditions is receiving growing attention. This study explores Canadian healthcare professionals' perceptions towards NIPT's current and possible future uses, including paternity testing, sex determination, and fetal whole genome sequencing. Semi-structured interviews were conducted with ten healthcare professionals, and another 184 participated in a survey. The triangulation of our findings shows that there is considerable agreement among healthcare professionals on expanding NIPT use for medical conditions including fetal aneuploidies and monogenic diseases, but not for non-medical conditions (sex determination for non-medical reasons and paternity testing), nor for risk predisposition information (late onset diseases and Fetal Whole Genome Sequencing). Healthcare professionals raise concerns related to eugenics, the future child's privacy, and psychological and emotional burdens to prospective parents. Professional societies need to take these concerns into account when educating healthcare professionals on the uses of NIPT to ensure prospective parents' reproductive decisions are optimal for them and their families.

Indigenous and Tribal Peoples Data Governance in Health Research: A Systematic Review.

There is increasing potential to improve the research and reporting on the health and wellbeing of Indigenous and Tribal peoples through the collection and (re)use of population-level data. As the data economy grows and the value of data increases, the optimization of data pertaining to Indigenous peoples requires governance that defines who makes decisions on behalf of whom and how these data can and should be used. An international a priori PROSPERO (#CRD42020170033) systematic review was undertaken to examine the health research literature to (1) identify, describe, and synthesize definitions and principles; (2) identify and describe data governance frameworks; and (3) identify, describe, and synthesize processes, policies and practices used in Indigenous Data Governance (ID-GOV). Sixty-eight articles were included in the review that found five components that require consideration in the governance of health research data pertaining to Indigenous people. This included (1) Indigenous governance; (2) institutional ethics; (3) socio-political dynamics; (4) data management and data stewardship; and (5) overarching influences. This review provides the first systematic international review of ID-GOV that could potentially be used in a range of governance strategies moving forward in health research.

Noninvasive Prenatal Testing: Views of Canadian Pregnant Women and Their Partners Regarding Pressure and Societal Concerns.

BACKGROUND: Noninvasive prenatal testing (NIPT) provides important benefits yet raises ethical concerns. We surveyed Canadian pregnant women and their partners to explore their views regarding pressure to test and terminate a pregnancy, as well as other societal impacts that may result from the routinization of NIPT. METHODS: A questionnaire was offered (March 2015 to July 2016) to pregnant women and their partners at five healthcare facilities in four Canadian provinces. RESULTS: 882 pregnant women and 395 partners completed the survey. 64% of women anticipated feeling no pressure to take the test if it were offered routinely, and 39% were not concerned about routinization leading to increased pressure to terminate a pregnancy of a fetus with Down Syndrome. Regarding other social concerns possibly resulting from routinization, pregnant women were most concerned regarding a reduction in resources available for people with Down Syndrome and their families and least concerned regarding a decrease in the population of people with Down Syndrome. CONCLUSIONS: Our findings reflect the concerns expressed by pregnant women and their partners, both personal (pressure to test, pressure to terminate) and societal (e.g., regarding potential negative impact on people with disabilities and their families). Even if most women were not concerned about feeling pressured to test due to NIPT routinization, a large minority express concerns that should not be taken lightly. Moreover, a majority of respondents were concerned regarding pressure to terminate pregnancies due to NIPT routinization as well as regarding most societal impacts they were queried on, especially the possible future reduction in resources available for people with DS and their families. Canadian policy-makers should consider these potential negative ramifications of NIPT and ensure that appropriate social policies accompany its implementation.

Evaluation of an Australian Aboriginal model of maternity care: The Malabar Community Midwifery Link Service.

BACKGROUND: The urban-based Malabar Community Midwifery Link Service integrates multidisciplinary wrap-around services along-side continuity of midwifery care for Aboriginal and Torres Strait Islander mothers and babies. AIM: To evaluate the Malabar Service from 1 January 2007 to 31 December 2014. METHODS: A mixed method design. Outcomes for mothers of Aboriginal and/or Torres Strait Islander babies cared for at an urban Australian referral hospital by the Malabar Service were compared to mainstream. Primary outcomes are rates of low birth weight; smoking >20 weeks gestation; preterm birth; and breastfeeding at discharge. Malabar outcomes are also compared to national and state perinatal outcomes. RESULTS: The Malabar Service (n = 505) demonstrated similar rates of preterm birth (aOR 2.2, 95% CI 0.96-4.97); breastfeeding at discharge (aOR 1.1, 95% CI 0.61-1.86); and a higher rate of low birth weight babies (aOR 3.6, 95% CI 1.02-12.9) than the comparison group (n = 201). There was a 25% reduction in smoking rates from 38.9% to 29.1%. Compared to national and state populations, Malabar outcomes were better. Women experienced greater psychosocial complexity but were well supported. Malabar Mothers (n = 9) experienced: accessibility, preparedness for birth and cultural safety. Staff (n = 13) identified going 'above and beyond' and teamwork to provide culturally safe care counterbalanced with concerns around funding and cultural support. CONCLUSIONS: Dedicated integrated continuity of midwifery care with wrap-around services for Aboriginal and/or Torres Strait Islander mothers is highly valued and is culturally safe. The service is as safe as main stream services and promotes better clinical outcomes compared to national and state outcomes.

A regional approach to plant DNA barcoding provides high species resolution of sedges (Carex and Kobresia, Cyperaceae) in the Canadian Arctic Archipelago.

Previous research on barcoding sedges (Carex) suggested that basic searches within a global barcoding database would probably not resolve more than 60% of the world's some 2000 species. In this study, we take an alternative approach and explore the performance of plant DNA barcoding in the Carex lineage from an explicitly regional perspective. We characterize the utility of a subset of the proposed protein-coding and noncoding plastid barcoding regions (matK, rpoB, rpoC1, rbcL, atpF-atpH, psbK-psbI) for distinguishing species of Carex and Kobresia in the Canadian Arctic Archipelago, a clearly defined eco-geographical region representing 1% of the Earth's landmass. Our results show that matK resolves the greatest number of species of any single-locus (95%), and when combined in a two-locus barcode, it provides 100% species resolution in all but one combination (matK + atpFH) during unweighted pair-group method with arithmetic mean averages (UPGMA) analyses. Noncoding regions were equally or more variable than matK, but as single markers they resolve substantially fewer taxa than matK alone. When difficulties with sequencing and alignment due to microstructural variation in noncoding regions are also considered, our results support other studies in suggesting that protein-coding regions are more practical as barcoding markers. Plastid DNA barcodes are an effective identification tool for species of Carex and Kobresia in the Canadian Arctic Archipelago, a region where the number of co-existing closely related species is limited. We suggest that if a regional approach to plant DNA barcoding was applied on a global scale, it could provide a solution to the generally poor species resolution seen in previous barcoding studies.