PGD

PGD
  • 文章类型: Journal Article
    形态性状通常指示特定的分类群,特别是在分类学和物种定界中充当关键。在这项研究中,具有类似Einfeldia的上volsella的非叮咬mid种,因此很难根据其形态特征准确确定。编译了两个核糖体基因和三个蛋白质编码基因的分子基因,以构建相关的属系统发育并解决分类学问题。系统发育推断显然支持属于Kiefferulus的未确定物种。因此,将Kiefferulus属中的一个新物种描述为来自中国东方的成年雄性。该物种可以很容易地与其他物种区分开来,因为它具有像Einfeldia一样的上火山和三角形的白蚁IX。
    Morphological traits are generally indicative of specific taxa, and particularly function as keys in taxonomy and species delimitation. In this study, a non-biting midge species with an Einfeldia-like superior volsella makes it hard to accurately determined based on its morphological characteristics. Molecular genes of two ribosomal genes and three protein-encoding genes were compiled to construct a related genera phylogeny and to address the taxonomic issues. Phylogenetic inference clearly supports the undetermined species as belonging to Kiefferulus. Therefore, a new species classified in the genus Kiefferulus is described and figured as an adult male from Oriental China. The species could be easily distinguished from other species in having an Einfeldia-like superior volsella and a triangular tergite IX.
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  • 文章类型: Journal Article
    Primary graft dysfunction (PGD) is a rare complication associated with high mortality after heart transplantation, which may require veno-arterial extra-corporeal membrane oxygenation (VA-ECMO) support. A standardized definition for PGD was developed by the International Society of Heart and Lung Transplantation in 2014. Due to limited reports using this definition, the detailed outcomes after VA-ECMO support remain unclear. Therefore, we retrospectively analyzed our single-center outcomes of PGD following VA-ECMO support. Between September 2014 and August 2018, 160 patients underwent heart transplantation in our single center. Nine PGD patients required VA-ECMO support, with an incidence of 5.6%. Pre-operative recipient/donor demographics, intra-operative variables, timing of VA-ECMO initiation and support duration, graft function recovery during 30 days after heart transplant, VA-ECMO complications, and survival were analyzed. The indication for VA-ECMO support was biventricular failure for all nine patients. Six patients had severe PGD requiring intra-operative VA-ECMO, while two patients had moderate PGD and one patient had mild PGD requiring post-operative VA-ECMO. All cohorts were successfully decannulated in a median of 10 days. Survival to discharge rate was 88.9%. One-year survival rate was 85.7%. Left ventricular ejection fraction recovered to normal within 30 days in all PGD patients. Our study showed VA-ECMO support led to high survival and timely graft function recovery in all cohorts. Further larger research can clarify the detailed effects of VA-ECMO support which may lead to standardized indication of VA-ECMO support for PGD patients.
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  • 文章类型: Journal Article
    背景:对于临床上判断为患有隐性孟德尔病的一部分个体,从临床全外显子组测序(WES)中只能发现一个杂合致病变异,对基因诊断和遗传咨询构成挑战。一个可能的原因是从短读取测序技术检测疾病因果结构变体(SV)的能力有限。长读段测序可以产生更长的读段(通常为1000bp或更长),因此,提供了大大提高的能力来检测可能被短阅读测序遗漏的SV。
    结果:这里我们描述了一个案例研究,其中WES为怀疑患有糖原贮积病Ia型(GSD-Ia)的个体仅鉴定出一种杂合致病变异,这是一种由G6PC基因双等位基因突变引起的常染色体隐性遗传疾病。通过纳米孔长读取全基因组测序,我们发现了一个7.1kb的缺失,覆盖了另一个等位基因上的两个外显子,这表明,复杂的结构变异(SVs)可能解释了在隐性疾病中WES中缺失第二个致病等位基因的一小部分病例。删除的两个断点都在Alu元素内,我们设计了基于断点的Sanger测序和定量PCR检测方法,用于另一个孩子的计划生育植入前遗传学诊断(PGD)。体外受精(IVF)后获得四个胚胎,PGD后移植G6PC中无缺失的胚胎,并经产前诊断证实,产后诊断,出生后缺乏疾病症状。
    结论:总之,我们介绍了使用长读数测序来识别外显子组阴性患者中因果但复杂的SV的第一个例子之一,随后实现了成功的个性化PGD。
    BACKGROUND: For a proportion of individuals judged clinically to have a recessive Mendelian disease, only one heterozygous pathogenic variant can be found from clinical whole exome sequencing (WES), posing a challenge to genetic diagnosis and genetic counseling. One possible reason is the limited ability to detect disease causal structural variants (SVs) from short reads sequencing technologies. Long reads sequencing can produce longer reads (typically 1000 bp or longer), therefore offering greatly improved ability to detect SVs that may be missed by short-read sequencing.
    RESULTS: Here we describe a case study, where WES identified only one heterozygous pathogenic variant for an individual suspected to have glycogen storage disease type Ia (GSD-Ia), which is an autosomal recessive disease caused by bi-allelic mutations in the G6PC gene. Through Nanopore long-read whole-genome sequencing, we identified a 7.1 kb deletion covering two exons on the other allele, suggesting that complex structural variants (SVs) may explain a fraction of cases when the second pathogenic allele is missing from WES on recessive diseases. Both breakpoints of the deletion are within Alu elements, and we designed Sanger sequencing and quantitative PCR assays based on the breakpoints for preimplantation genetic diagnosis (PGD) for the family planning on another child. Four embryos were obtained after in vitro fertilization (IVF), and an embryo without deletion in G6PC was transplanted after PGD and was confirmed by prenatal diagnosis, postnatal diagnosis, and subsequent lack of disease symptoms after birth.
    CONCLUSIONS: In summary, we present one of the first examples of using long-read sequencing to identify causal yet complex SVs in exome-negative patients, which subsequently enabled successful personalized PGD.
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  • 文章类型: Case Reports
    To report a rare case of somatic mosaicism with a germline component of campomelic dysplasia in a woman undergoing in vitro fertilization with preimplantation genetic diagnosis (IVF-PGD).
    Case report.
    Clinic.
    A 28-year old G2P0110 and her 34-year old husband had two previous pregnancies complicated by fetal campomelic dysplasia with suspected germline mosaic mutation. The couple, both phenotypically normal, underwent IVF-PGD to reduce their chances of transmission. None of the embryos could initially be determined to be disease free, because all embryos shared either a maternal or a paternal short tandem repeat haplotype with the products of conception from her last pregnancy.
    Peripheral-blood cytogenomic single-nucleotide polymorphism (SNP) microarray to identify the carrier of the mutation, and IVF-PGD to identify the disease-free embryo.
    Disease-free embryo.
    Only one of the five euploid embryos was identified as disease free.
    A woman with suspected germline mosaicism for campomelic dysplasia was found to be a somatic mosaic with a germline component via a peripheral blood SNP microarray test. This identified her solitary disease-free embryo, which was transferred to her uterus but did not result in a viable pregnancy.
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  • 文章类型: Journal Article
    背景:原发性免疫缺陷病(PID)存活到成年并愿意生孩子的患者大多担心他们的疾病是否会影响他们的生育能力和/或怀孕,以及他们的孩子是否容易患PID。
    方法:我们报告受孕的结果,9个明确诊断为PID的家庭的妊娠及其管理。一名妊娠顺利的慢性肉芽肿疾病患者在分娩后几周出现真菌性骶骨骨髓炎。一名患有特发性血小板减少症的妊娠常见可变免疫缺陷病(CVID)患者在分娩前血小板计数下降。一位拒绝获得IFNγ的中性粒细胞减少症母亲分娩了两个健康的孩子。CVID病例不耐受IVIg并伴有子痫和PTE分娩了婴儿。另一名CVID女性在没有接受任何治疗的情况下生下了一个婴儿,因为她当时没有被诊断出患有免疫缺陷疾病。在一个拥有WiskottAldrich受影响儿子的家庭中,通过植入前性别选择植入了一个健康的女孩。一个有两个患有共济失调性毛细血管扩张症的孩子的家庭为他们的第三个孩子使用了捐赠的卵母细胞。产前基因诊断用于筛查胎儿中分别在两个独立家庭的兄弟姐妹和父亲中检测到的受损的BTK和CVID基因。
    结论:PID患者的妊娠比正常人群更复杂。因为,它不仅有机会被后代继承,但如果母亲有任何免疫成分缺陷,也有一些风险。因此,咨询临床遗传学家对于选择最佳方法至关重要。他们也应该观察和随后的临床免疫学家采取最好的安全护理。
    BACKGROUND: Patients with primary immunodeficiency disease (PID) who survive to adulthood and willing to have a child mostly are worried whether their disease affects their fertility and/or pregnancy and also if their child would be predisposed to PID.
    METHODS: We report the outcome of conception, pregnancy and their management in 9 families with definite diagnosis of PID. A chronic granulomatous disease subject with an uneventful pregnancy developed fungal sacral osteomyelitis few weeks after delivery. A pregnant common variable immunodeficiency disease (CVID) patient with idiopathic thrombocytopenia had platelet count dropped before delivery. A sever neutropenic mother who refused to get IFNγ delivered two healthy children. A CVID case intolerant to IVIg with eclampsia and PTE delivered a baby. Another CVID female gave birth to a baby without being on any treatment since she was not diagnosed with immunodeficiency disease at that time. A healthy girl was implanted via preimplantation gender selection in a family who owned a Wiskott Aldrich-affected son. A family who had two children with Ataxia Telangiectasia used donated oocyte for their 3rd child. Prenatal genetic diagnosis was used to screen the fetus for the impaired BTK and CVID genes detected in sibling and father respectively in 2 separate families.
    CONCLUSIONS: Pregnancy in PID patients is more complex than normal population. Because, not only it has the chance of being inherited by the offspring, but also there are some risks for the mother if she has any kind of immunity component defects. So consultation with a clinical geneticist is crucial to choose the best available approach. They also should be observed and followed by a clinical immunologist to take the best possible safe care.
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  • 文章类型: Comparative Study
    The national ethical guidelines relevant to assisted reproductive technology (ART) have recently been reviewed by the National Health and Medical Research Council (NHMRC). The review process paid particular attention to the issue of non-medical sex selection, although ultimately, the updated ethical guidelines maintain the pre-consultation position of a prohibition on non-medical sex selection. Whilst this recent review process provided a public forum for debate and discussion of this ethically contentious issue, the Victorian case of JS and LS v Patient Review Panel (Health and Privacy) [2011] VCAT 856 provides a rare instance where the prohibition on non-medical sex selection has been explored by a court or tribunal in Australia. This paper analyses the reasoning in that decision, focusing specifically on how the Victorian Civil and Administrative Tribunal applied the statutory framework relevant to ART and its comparison to other uses of embryo selection technologies. The Tribunal relied heavily upon the welfare-of-the-child principle under the Assisted Reproductive Treatment Act 2008 (Vic). The Tribunal also compared non-medical sex selection with saviour sibling selection (that is, where a child is purposely conceived as a matched tissue donor for an existing child of the family). Our analysis leads us to conclude that the Tribunal\'s reasoning fails to adequately justify the denial of the applicants\' request to utilize ART services to select the sex of their prospective child.
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  • 文章类型: Case Reports
    Pre-implantation genetic diagnosis (PGD) or screening (PGS) technology, has emerged and developed in the past few years, benefiting couples as it allows the selection and transfer of healthy embryos during IVF treatments. These techniques can be performed in oocytes (polar-body biopsy) or embryos (blastomere or trophectoderm biopsy). In this case report, we describe the first two live births to be published in Brazil after a polar-body (PB) biopsy. In case 1, a 42-year-old was submitted to PB biopsy with PGS due to advanced maternal age and poor ovarian reserve. Five MII oocytes underwent first and second polar body biopsy and four cleavage embryos were cryopreserved. The PGS analysis resulted in two euploid embryos (next generation sequence). A frozen-thawed embryo transfer (FET) was performed after endometrial priming and a healthy baby was delivered after a cesarean section (37 weeks, female, 3390g, 47.5 cm). In case 2, a 40-year old patient with balanced translocation and poor ovarian response was submitted to PB biopsy. Two MII oocytes underwent first and second polar body biopsy and two embryos were cryopreserved in cleavage stage. The analysis resulted in one euploid embryo that was transferred after endometrial priming. A preterm healthy baby (34 weeks, female, 2100g, 40 cm) was delivered via cesarean section. In conclusion, although the blastocyst biopsy is the norm when performing PGS/PGD during IVF treatments, other alternatives (as PB biopsy) should be considered in some specific situations.
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  • 文章类型: Journal Article
    背景:长期悲伤障碍(PGD)是一种潜在的致残疾病,影响约10%的丧亲者。有人认为,丧失记忆的整合受损,表现在记忆的丧失和混乱的反复记忆中,参与了PGD的开发。叙事重建(NR),最初设计用于在综合治疗模块中治疗创伤后应激障碍(PTSD),包括暴露于失去的记忆,详细的书面重建失去记忆的叙述和阐述的个人意义的记忆对失去亲人,已被证明是有效的治疗入侵症状。
    目的:根据认知行为疗法(CBT)的研究结果,包括认知重组和暴露,对PGD的治疗有效,我们建议实施一个有点新颖的治疗模块,NR,用于治疗失去亲人的患者的侵入性现象。
    方法:介绍了PGD实施NR的理由,并对一名父亲去世后患有PGD的妇女进行了个案研究。治疗在大学门诊培训诊所进行。
    结果:在治疗前后和3个月随访时进行的评估证明了NR在减轻PGD和抑郁症状方面的有效性。对治疗前后记录的自发叙述的分析表明,叙述的组织增加了。
    结论:本病例报告显示NR用于治疗PGD。研究结果为NR用于PGD的有效性提供了初步支持。讨论了研究的意义及其局限性。
    BACKGROUND: Prolonged grief disorder (PGD) is a potentially disabling condition affecting approximately 10% of bereaved people. It has been suggested that the impaired integration of the loss memory, as expressed in recurrent memories of the loss and disorganization of memory, is involved in the development of PGD. Narrative reconstruction (NR), originally designed for the treatment of posttraumatic stress disorder (PTSD) in an integrative therapy module, and consisting of exposure to the loss memory, detailed written reconstruction of the loss memory narrative and an elaboration of the personal significance of that memory for the bereaved, has been shown to be effective in the treatment of intrusion symptoms.
    OBJECTIVE: In light of findings that cognitive behavior therapy (CBT), including cognitive restructuring and exposure, is effective in the treatment of PGD, we suggest the implementation of a somewhat novel therapy module, NR, for the treatment of intrusive phenomena in bereaved patients.
    METHODS: The rationale for the implementation of NR for PGD and a case study of the treatment of a woman suffering from PGD after the death of her father are presented. Therapy took place in a university outpatient training clinic.
    RESULTS: Evaluations conducted before and after treatment and at a 3-month follow-up demonstrated the effectiveness of NR in reducing symptoms of PGD and depression. The analysis of spontaneous narratives recorded before and after treatment showed an increased organization of the narratives.
    CONCLUSIONS: This case report demonstrates an adaptation of NR for the treatment of PGD. The results provide preliminary support for the effectiveness of NR for PGD. The significance of the study and its limitations are discussed.
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  • 文章类型: Journal Article
    目的:学龄前植入前遗传学诊断(PGD)儿童的认知和精神运动发育是否与ICSI和自发性受孕(SC)后出生的儿童不同?
    结论:PGD学龄前儿童的认知发育与ICSI和SC后出生的儿童相当,但ICSI和SC组的运动发育不同。
    方法:与49名ICSI和48名SC儿童相比,对PGD后出生的5至6岁单身人士(n=47)的认知能力和运动技能进行了评估。病例控制,2011年4月至2013年5月的匹配随访研究。
    方法:PGD单身人士,使用韦克斯勒学龄前和初级智力量表(WPSSI-III-NL)和运动ABC(MABC)检查了ICSI和SC学龄前儿童。WPSSI-III-NL显示了全智商的分数,言语智商和表现智商。MABC产生总分,包括平衡测量的分数,灵巧和球技。由于胚胎活检是PGD和ICSI程序之间唯一的技术区别,ICSI儿童作为对照。这些孩子是在接受纵向随访的ZiekenhuisBrussel大学(UZBrussel)辅助生殖技术(ART)后受孕的荷兰语儿童群体的一部分。SC儿童充当第二对照组,与肥沃的PGD样本相似,与ICSI组相反。SC小组是通过各种媒体的公告招募的。孩子们的年龄是匹配的,性别,母亲的出生顺序和受教育程度。对ART组进行的评估尽可能是盲目的。使用协方差分析(ANCOVA)和偏eta平方(η(2))分析数据,用作效应大小的度量。
    结果:PGD患者的总体认知发展与对照组无差异[P=0.647,η(2)=0.006;95%置信区间(CI)(0,0.043)]。言语和表现智力的部分智商得分显示出类似的结果。基于总分和分量表的运动发育分析确实表明三个受孕组之间存在显着差异[P=0.033,η(2)=0.050,95%CI(0,0.124)]。事后分析表明,ICSI和SC儿童的表现之间存在显着差异。平衡容量[P=0.004,η(2)=0.079,95%CI(0.025,0.163)]及其事后分析产生了等效结果。PGD单缸电机容量,然而,与其他两个概念组没有区别。
    结论:鉴于我们仅评估PGD后出生的白人单身人士,从我们的结果中得出更一般的推论时,需要谨慎行事。小样本大小可能是一个限制。先验功率分析,然而,显示,每组至少需要52名儿童使用ANCOVA检测到中等效应和80%功率。最初,我们的样本符合此阈值,但我们必须排除6个案例,以消除异常值和由于缺少数据。
    结论:对胚胎活检后出生的儿童进行长期随访,在这种情况下对于PGD,需要确认这些儿童的发育仍与ICSI和SC儿童相当。我们的发现确实支持了PGD技术的安全性,并将使患有遗传性遗传疾病的患者放心,他们未来的后代受孕于PGD。
    背景:这项研究的资金来自OZR(布鲁塞尔自由大学研究小组),FWO(FondsWetenschappelijkOnderzoek)和WetenschappelijkFondsWillyGepts。UZBrussel和医学遗传学中心从制药公司获得了用于数据收集的资金。UZBrussel和医学遗传学中心收到了许多教育补助金,用于组织数据收集,来自IBSA,套圈,Organon,Shering-Plough,默克公司和比利时默克公司。M.B.已从Organon收到咨询和演讲者的费用,塞罗诺研讨会和默克。
    OBJECTIVE: Do preschool preimplantation genetic diagnosis (PGD) children differ in their cognitive and psychomotor development from children born after ICSI and spontaneous conception (SC)?
    CONCLUSIONS: The cognitive development of PGD pre-schoolers was comparable to children born after ICSI and SC but motor development differed between ICSI and SC groups.
    METHODS: The cognitive abilities and motor skills of 5- to 6-year-old singletons born after PGD (n = 47) were assessed in comparison with 49 ICSI and 48 SC children in a prospective, case-controlled, matched follow-up study between April 2011 and May 2013.
    METHODS: PGD singletons, ICSI and SC children of preschool age were examined with the Wechsler Preschool and Primary Scale of Intelligence (WPSSI-III-NL) and the Movement ABC (M ABC). The WPSSI-III-NL revealed scores for Full IQ, Verbal IQ and Performance IQ. The M ABC yields a total score and comprising scores for measurements of balance, dexterity and ball skills. Since embryo biopsy is the only technical difference between the PGD and ICSI procedures, ICSI children were included as controls. These children were part of a Dutch-speaking cohort of children conceived after assisted reproduction technology (ART) at the Universitair Ziekenhuis Brussel (UZ Brussel) who received longitudinal follow-up. The SC children acted as a second control group similar to the fertile PGD sample and in contrast to the ICSI group. The SC group was recruited through announcements in a variety of media. The children were matched for age, gender, birth order and educational level of the mother. The assessments carried out for the ART groups were blinded whenever possible. The data were analysed using analysis of covariance (ANCOVA) and partial eta squared (η(2)), which was used as a measurement of effect size.
    RESULTS: The overall cognitive development of PGD singletons did not differ from controls [P = 0.647, η(2) = 0.006; 95% confidence interval (CI) (0, 0.043)]. The partial IQ scores for Verbal and Performance intelligence revealed similar results. Analysis of motor development based on the total score as well as subscales did indicate a significant difference between the three conception groups [P = 0.033, η(2) = 0.050, 95% CI (0, 0.124)]. Post hoc analysis indicated that the significant difference was situated between performances of ICSI and SC children. Balance capacities [P = 0.004, η(2) = 0.079, 95% CI (0.025, 0.163)] and its post hoc analysis yielded equivalent results. Motor capacities of PGD singletons, however, did not differ from any of the two other conception groups.
    CONCLUSIONS: Given that we only assessed Caucasian singletons born after PGD, caution is required when drawing more general inferences from our results. The small sample size may be a limitation. A priori power analysis, however, revealed that at least 52 children per group were needed to detect a medium effect and 80% power using ANCOVA. Originally our sample met this threshold but we had to exclude six cases in order to remove outliers and due to missing data.
    CONCLUSIONS: Long-term follow-up of children born after embryo biopsy, in this case for PGD, is needed to confirm that the development of these children remains comparable to ICSI and SC children. Our findings do support the safety of the PGD technique and will reassure patients with hereditary genetic diseases regarding the health of their future offspring conceived with PGD.
    BACKGROUND: Funding for this study was obtained from the OZR (Research group of the Vrije Universiteit Brussel), the FWO (Fonds Wetenschappelijk Onderzoek) and the Wetenschappelijk Fonds Willy Gepts. The UZ Brussel and the Centre of Medical Genetics received funding from pharmaceutical firms for data collection. UZ Brussel and the Centre for Medical Genetics have received many educational grants for organizing the data collection, from IBSA, Ferring, Organon, Shering-Plough, Merck and Merck Belgium. M.B. has received consultancy and speaker\'s fees from Organon, Serono Symposia and Merck.
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  • 文章类型: Case Reports
    Preimplantation genetic diagnosis (PGD) is offered to couples carrying a reciprocal translocation in an attempt to increase their chance of phenotypically normal offspring. For the selection of embryos that are balanced for the translocation chromosomes, it is critical to use a combination of DNA probes that can take account of all the segregation patterns of the particular translocation. The frequency of the different segregation types differs depending on the chromosomes involved, the location of the breakpoints and the number of chiasmata and the sex of the carrier. We report on a case of misdiagnosis after PGD-fluorescence in situ hybridization in a female translocation 46,X,t(X;5)(q13;p14) carrier. Transfer of two embryos diagnosed as balanced for the translocation chromosomes resulted in a singleton pregnancy that miscarried at 8 weeks\' gestational age. The unbalanced karyotype of the fetus was consistent with 3:1 segregation resulting in tertiary trisomy for the derivative chromosome 5: 47,XX,+der(5)t(X;5)(q13;p14)mat. Based on additional molecular cytogenetic studies of fetal tissue and the initially investigated blastomeres, we concluded that the misdiagnosis was most probably due to a technical error, i.e. a partial hybridization failure or co-localization of the Xq/Yq subtelomere probe signals. No evidence for a normal cell line (mosaicism) was found in the fetus, which could have explained the discrepancy. This case demonstrates the importance of using two diagnostic probes or testing 2 cells to detect translocation products with potentially viable imbalance. X;autosome translocations are a special case due to the added complication of X chromosome inactivation and particular caution is advised when designing a PGD strategy.
    BACKGROUND: not applicable.
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