Spina bifida

Non-neural surface ectodermal rosette formation and F-actin dynamics drive mammalian neural tube closure

The mechanisms underlying mammalian neural tube closure remain poorly understood. We report a unique cellular process involving multicellular rosette formation, convergent cellular protrusions, and F-actin cable network of the non-neural surface ectodermal cells encircling the closure site of the posterior neuropore, which are demonstrated by scanning electron microscopy and genetic fate mapping analyses during mouse spinal neurulation. These unique cellular structures are severely disrupted in the surface ectodermal transcription factor Grhl3 mutants that exhibit fully penetrant spina bifida. We propose a novel model of mammalian neural tube closure driven by surface ectodermal dynamics, which is computationally visualized.

A Transforaminal Endoscopic Surgical Technique for Treating Lumbar Disc Herniation in the Setting of Spina Bifida

Recent literature suggests that adult patients with spina bifida receive surgery for degenerative disc disease at higher rates than the general population. However, sometimes the complex anatomic features of co-occurring spina bifida and lumbar disc herniation can significantly challenge standard surgical techniques. Here, the technical steps are presented for treating a foraminal lumbar 4-5-disc herniation in the setting of a patient with multifaceted degenerative and spina bifida occulta anatomy. Utilized is a minimally invasive approach that does not require general anesthesia or fusion and allows the patient to leave the same day. To the best of our knowledge, this is the first-reported case of endoscopic surgical decompression of a lumbar disc in a patient with spina bifida.

In Utero Restoration of Hindbrain Herniation in Fetal Myelomeningocele as Part of Prenatal Regenerative Therapy Program at Mayo Clinic

OBJECTIVE

To assess our initial experience with prenatal restoration of hindbrain herniation following in utero repair of myelomeningocele (MMC).

PATIENTS AND METHODS

Three consecutive patients with prenatally diagnosed MMC (between January 1, 2018 and September 30, 2018) were managed with open in utero surgery. As per institutional review board approval and following a protocol designed at the Mayo Clinic Maternal & Fetal Center, fetal intervention was offered between 19 0/7 and 25 6/7 weeks of gestation. Prenatal improvement of hindbrain herniation was the declared restorative end point. Obstetrical and perinatal outcomes were also assessed.

RESULTS

Diagnosis of MMC was confirmed upon referral between 20 and 21 weeks' gestation by using fetal ultrasound and magnetic resonance imaging. In all cases reported here, the spinal defect was lumbosacral with evidence of hindbrain herniation. Open in utero MMC repair was performed between 24 and 25 weeks' gestation with no notable perioperative complications. Postprocedure fetal magnetic resonance imaging performed 6 weeks after in utero repair documented improvement of hindbrain herniation. Deliveries were at 37 weeks by cesarean section without complications. Most recent postnatal follow-ups were unremarkable at both 11 months (baby 1) and 3 months of age (baby 2), with mild ventriculomegaly. Antenatal and postnatal follow-up of baby 3 at 1 month of age was also unremarkable.

CONCLUSION

Our study highlights the prenatal restoration of hindbrain herniation following in utero MMC repair in all cases presented here as an example of a prenatal regenerative therapy program in our institution.

Fibronectin is a smart adhesive that both influences and responds to the mechanics of early spinal column development

An extracellular matrix of Fibronectin adheres the neural tube to the two flanking columns of paraxial mesoderm and is required for normal vertebrate development. Here, we find that the bilaterally symmetric interfaces between the zebrafish neural tube and paraxial mesoderm function as optimally engineered adhesive lap joints with rounded edges, graded Fibronectin ‘adhesive’ and an arced adhesive spew filet. Fibronectin is a ‘smart adhesive’ that remodels to the lateral edges of the neural tube-paraxial mesoderm interfaces where shear stress is highest. Fibronectin remodeling is mechanically responsive to contralateral variation morphogenesis, and Fibronectin-mediated inter-tissue adhesion is required for bilaterally symmetric morphogenesis of the paraxial mesoderm. Strikingly, however, perturbation of the Fibronectin matrix rescues the neural tube convergence defect of cadherin 2 mutants. Therefore, Fibronectin-mediated inter-tissue adhesion dynamically coordinates bilaterally symmetric morphogenesis of the vertebrate trunk but predisposes the neural tube to convergence defects that lead to spina bifida.

In embryos, the spinal cord starts out as a flat sheet of cells that curls up to form a closed cylinder called the neural tube. The folding tube is attached to the surrounding tissues through an extracellular matrix of proteins and sugars. Overlapping strands of a protein from the extracellular matrix called Fibronectin connect the neural tube to adjacent tissues, like a kind of biological glue. However, it remained unclear what effect this attachment had on the embryonic development of the spinal cord.

Connecting two overlapping objects with glue to form what is known as an ‘adhesive lap joint’ is common in fields such as woodworking and aeronautical engineering. The glue in these joints comes under shearing stress whenever the two objects it connects try to pull apart. But, thanks to work in engineering, it is possible to predict how different joints will perform under tension. Now, Guillon et al. have deployed these engineering principles to shed light on neural tube development.

Using zebrafish embryos and computational models, Guillon et al. investigated what happens when the strength of the adhesive lap joints in the developing spine changes. This revealed that Fibronectin works like a smart adhesive: rather than staying in one place like a conventional glue, it moves around. As the neural tube closes, cells remodel the Fibronectin, concentrating it on the areas under the highest stress. This seemed to both help and hinder neural tube development. On the one hand, by anchoring the tube equally to the left and right sides of the embryo, the Fibronectin glue helped the spine to develop symmetrically. On the other hand, the strength of the adhesive lap joints made it harder for the neural tube to curl up and close.

If the neural tube fails to close properly, it can lead to birth defects like spina bifida. One of the best-known causes of these birth defects in humans is a lack of a vitamin known as folic acid. Cell culture experiments suggest that this might have something to do with the mechanics of the cells during development. It may be that faulty neural tubes could close more easily if they were able to unglue themselves from the surrounding tissues. Further use of engineering principles could shed more light on this idea in the future.

A Systematic Review of Behavioral Intervention Technologies for Youth With Chronic Health Conditions and Physical and Intellectual Disabilities: Implications for Adolescents and Young Adults With Spina Bifida

OBJECTIVE

Behavioral intervention technologies (BITs) stand as a promising delivery mechanism that overcomes multiple condition-specific and access barriers for self-management interventions for adolescents and young adults with spina bifida (AYA-SB). The purpose of the current review was to synthesize the behavioral and self-management intervention literature in conditions that have overlapping symptoms with youth with SB and to develop a model of likely user needs for AYA-SB that promotes self-management.

METHOD

The search strategy was conducted by a medical research librarian in the following databases: MEDLINE (Ovid), EMBASE (Elsevier), PsycINFO (EbscoHost), the Cochrane Library (Wiley), and Web of Science (Thomson Reuters) databases. The review was based on a systematic narrative synthesis framework and adhered to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines (registration number CRD42018092342).

RESULTS

In total, 18 articles were included in the current BIT review. The majority of included studies (1) targeted the management of chronic health conditions, (2) were informed by evidence-based approaches, (3) relied on content delivery, (4) were Web-based, (5) used linear or user-driven workflows, (6) included professional human support, and (7) included a control condition.

CONCLUSIONS

Many of the evaluated BITs resulted in acceptable usage and maintained or improved targeted symptoms. A user needs model for AYA-SB is proposed with the intention that future research will promote further refinement and ultimate deployment of a BIT for AYA-SB to promote self-management.

Ambulation, lesion level, and health-related quality of life in children with myelomeningocele

PURPOSE

The aim is to investigate the health-related quality of life (HRQOL) in children with myelomeningocele (MMC), compare the results with those of healthy children, and determine the factors related to HRQOL.

METHODS

Fifty children with MMC with a mean age of 8.96 ± 2.57 and 50 healthy children with a mean age of 9.50 ± 2.42 were included in the study. The demographic information form and the CHQ-PF-50 (Child Health Questionnaire Parent form 50) were completed to determine the quality of life (QOL) for the children. Ambulation levels of children with MMC and disease-specific findings were recorded. The HRQOL scores of children with MMC were compared with healthy children and assessed according to lesion levels and ambulation status.

RESULTS

The CHQ-PF-50 scores of healthy and MMC children had no significant difference in the sub-dimensions of health change (p > 0.05), but the mean QOL score of children with MMC was significantly lower in all other sub-dimensions (p < 0.05). In addition, QOL scores according to lesion levels in children with MMC were significantly different between the three groups (p < 0.05). The QOL scores were the highest in the sacral group and the lowest in the thoracic-high lumbar group. The QOL for non-ambulatory children was significantly lower than for ambulatory children with MMC (p < 0.05).

CONCLUSIONS

The present study confirms that children with MMC have diminished HRQOL and non-ambulatory and children with high lesion levels are affected the most. Our result suggests that focusing on the activities that will enable children to acquire the ability to walk can positively affect the HRQOL.

Therapeutic potential of adenovirus-encoding brain-derived neurotrophic factor for spina bifida aperta by intra-amniotic delivery in a rat model

Spina bifida aperta is a type of neural tube defect (NTD). Although prenatal fetal surgery has been an available and effective treatment for it, the neurological functional recovery is still need to be enhanced. Our previous results revealed that deficiencies of sensory, motor, and parasympathetic neurons were primary anomalies that occurred with the spinal malformation. Therefore, we emphasized that nerve regeneration is critical for NTD therapy. We delivered an adenoviral construct containing genes inserted for green fluorescent protein and brain-derived neurotrophic factor (Ad-GFP-BDNF) into the amniotic fluid to investigate its prenatal therapeutic potential for rat fetuses with spina bifida aperta. Using immunofluorescence, TdT-mediated dUTP nick-end labeling staining, and real-time polymerase chain reaction analysis, we assessed cell apoptosis in the defective spinal cord and Brn3a positive neuron survival in the dorsal root ganglion (DRG); a protein array was used to investigate the microenvironmental changes of the amniotic fluid. We found that most of the overexpressed BDNF was present on the lesions of the spina bifida fetuses, the number of apoptosis cells in Ad-GFP-BDNF-transfected spinal cords were reduced, mRNA levels of Bcl2/Bax were upregulated and Casp3 were downregulated compared with the controls, the proportion of Brn3a positive neurons in DRG were increased by activating the BDNF/TrkB/Akt signaling pathway, and most of the significant changes in cytokines in the amniotic fluid were related to the biological processes of regulation of apoptotic process and generation of neurons. These results suggest that intra-amniotic Ad-GFP-BDNF gene delivery might have potential as a supplementary approach to treat congenital malformations of neural tubes.

The feasibility and acceptability of goal management training of executive functions in children with spina bifida and acquired brain injury

Executive dysfunction causes significant real-life disability for children with spina bifida (SB) and acquired brain injury (ABI), and efficient interventions are needed. Goal Management Training (GMT) is a cognitive rehabilitation intervention for improving executive function (EF) that has received empirical support in studies of adults with SB and ABI. The purpose of this study was to determine the feasibility and acceptability of a newly developed pediatric GMT protocol (pGMT). Thirteen children (7 boys, 10-16 years) with SB (n = 4), traumatic brain injury (n = 8), and encephalitis (n = 1) were included, based upon the presence of EF problems as described by parents. The participants received 21 h of pGMT, using inpatient intervention periods, followed by 4 h of pGMT outpatient guidance over 8 weeks. Notably, pGMT was found to be both feasible and acceptable, with satisfactory compliance for the children, parents and teachers, in addition to being considered acceptable by all participants. Furthermore, a reliable change in daily life EF was reported by the parents for 2 children. And, some children obtained scores below clinical cut-off on a measure of parent reported real-life EF after intervention. Hence, findings suggest that a randomized controlled trial of pGMT, with a larger sample size, should be conducted.

Study of Spina Bifida Occulta Based on Age, Sex and Localization

Introduction: Spina bifida is a spine malformation that appears as an incomplete closure of the spine during development. Most frequently it involves lumbosacral vertebrae. There are two types of spina bifida: spina bifida aperta and spina bifida occulta. In most of the cases spina bifida occulta is asymptomatic, and it is identified by accident.

Objectives: the aim of this study was to correlate localization of spina bifida occulta with age and sex of the patients.

Materials and methods: Between July 2017 and January 2019 there have been 108 patients diagnosed with spina bifida occulta at the Radiology Department of Dora Medicals Tîrgu Mureș. The diagnoses were based on thoracolumbar spine x-ray, pelvic x-ray and chest x-ray studies requested by specialist physicians. Radiologic diagnosis was followed by data processing and statistical analysis.

Results: In 81% of the cases the lesion was localized to vertebra S1, and in 15% to vertebra L5; we identified other five cases of rare localizations: C7- T1- T2, T1, T2, S2. This lesion was diagnosed most frequently at ages from 11 to 15 years (44.4%). Spina bifida localized to L5 was more frequent in males (11/16, 68.7%). Cases localized to S1 were more frequent in females (60/88, 68.1%). All spina bifida cases in females localized to vertebra L5 were diagnosed before 20 years of age.

Conclusions: Our results partially correspond to those reported in other published studies.

Integrin-Mediated Focal Anchorage Drives Epithelial Zippering during Mouse Neural Tube Closure

Epithelial fusion is a key process of morphogenesis by which tissue connectivity is established between adjacent epithelial sheets. A striking and poorly understood feature of this process is "zippering," whereby a fusion point moves directionally along an organ rudiment. Here, we uncover the molecular mechanism underlying zippering during mouse spinal neural tube closure. Fusion is initiated via local activation of integrin β1 and focal anchorage of surface ectoderm cells to a shared point of fibronectin-rich basement membrane, where the neural folds first contact each other. Surface ectoderm cells undergo proximal junction shortening, establishing a transitory semi-rosette-like structure at the zippering point that promotes juxtaposition of cells across the midline enabling fusion propagation. Tissue-specific ablation of integrin β1 abolishes the semi-rosette formation, preventing zippering and causing spina bifida. We propose integrin-mediated anchorage as an evolutionarily conserved mechanism of general relevance for zippering closure of epithelial gaps whose disturbance can produce clinically important birth defects.

Multiple Congenital Anomalies in a Patient with Interstitial 6q26 Deletion

We report a preterm male neonate presenting with a lumbosacral meningomyelocele, type II Arnold Chiari malformation, hypoplasia of the aortic arch, bicuspid aortic valve, ventricular septal defect, secundum atrial septal defect, multicystic dysplastic kidney, and hydronephrosis. Analysis with whole genome SNP microarray revealed an interstitial deletion of about 237 kb in chromosome 6q26. Long contiguous stretches of homozygosity (>3 Mb) were seen in 18 chromosomes with a total genomic size of 219 Mb. The phenotype seen in our patient has not been reported in association with the genes in the homozygous regions. However, our patient shares many phenotypic features with other reported cases that have shown a deletion in the same region of chromosome 6.

First trimester detection of fetal open spina bifida using BS/BSOB ratio

BACKGROUND

Despite the well-known second trimester ultrasound signs, current possibilities of in utero surgical repair of open spina bifida require a timely detection of the spine defect.

OBJECTIVE

To evaluate the diagnostic accuracy of the ratio between brain stem (BS) diameter and its distance to the occipital bone (BSOB) (BS/BSOB ratio) in the detection of fetuses with open spina bifida at first trimester ultrasound.

METHODS

A systematic review and meta-analysis of diagnostic accuracy was performed by searching seven electronic databases from their inception to February 2019 for all studies assessing the association between BS/BSOB ratio and diagnosis of spine bifida. Diagnostic accuracy of BS/BSOB ratio in prenatal diagnosis of spine bifida was assessed as sensitivity, specificity, positive and negative likelihood ratios (LR + and LR-), and area under the curve (AUC) on SROC curves.

RESULTS

Four studies, including 17,598 fetuses with 23 cases of open spina bifida, were included in the meta-analysis. BS/BSOB ratio showed pooled sensitivity of 0.70 (95% CI 0.47-0.87; I² = 78.3%), specificity of 1.00 (95% CI 0.99-1.0; I² = 99.2%), LR + and LR- of 51.44 (95% CI 9.53-277.64; I² = 85.5%) and 0.23 (95% CI 0.04-1.17; I² = 64.8%), respectively, and an AUC of 0.9649.

CONCLUSION

First trimester BS/BSOB ratio has a high diagnostic accuracy in detecting fetuses with open spina bifida.

Prenatal Repair of Myelomeningocele and School-age Functional Outcomes

BACKGROUND AND OBJECTIVES

The Management of Myelomeningocele Study (MOMS), a randomized trial of prenatal versus postnatal repair for myelomeningocele, found that prenatal surgery resulted in reduced hindbrain herniation and need for shunt diversion at 12 months of age and better motor function at 30 months. In this study, we compared adaptive behavior and other outcomes at school age (5.9-10.3 years) between prenatal versus postnatal surgery groups.

METHODS

Follow-up cohort study of 161 children enrolled in MOMS. Assessments included neuropsychological and physical evaluations. Children were evaluated at a MOMS center or at a home visit by trained blinded examiners.

RESULTS

The Vineland composite score was not different between surgery groups (89.0 ± 9.6 in the prenatal group versus 87.5 ± 12.0 in the postnatal group; P = .35). Children in the prenatal group walked without orthotics or assistive devices more often (29% vs 11%; P = .06), had higher mean percentage scores on the Functional Rehabilitation Evaluation of Sensori-Neurologic Outcomes (92 ± 9 vs 85 ± 18; P < .001), lower rates of hindbrain herniation (60% vs 87%; P < .001), had fewer shunts placed for hydrocephalus (49% vs 85%; P < .001) and, among those with shunts, fewer shunt revisions (47% vs 70%; P = .02) than those in the postnatal group. Parents of children repaired prenatally reported higher mean quality of life z scores (0.15 ± 0.67 vs 0.11 ± 0.73; P = .008) and lower mean family impact scores (32.5 ± 7.8 vs 37.0 ± 8.9; P = .002).

CONCLUSIONS

There was no significant difference between surgery groups in overall adaptive behavior. Long-term benefits of prenatal surgery included improved mobility and independent functioning and fewer surgeries for shunt placement and revision, with no strong evidence of improved cognitive functioning.

Sustained Postnatal Skin Regeneration Upon Prenatal Application of Functionalized Collagen Scaffolds

Primary closure of fetal skin in spina bifida protects the spinal cord and improves clinical outcome, but is also associated with postnatal growth malformations and spinal cord tethering. In this study, we evaluated the postnatal effects of prenatally closed full-thickness skin defects in sheep applying collagen scaffolds with and without heparin/vascular endothelial growth factor/fibroblast growth factor 2, focusing on skin regeneration and growth. At 6 months, collagen scaffold functionalized with heparin, VEGF, and FGF2 (COL-HEP/GF) resulted in a 6.9-fold increase of the surface area of the regenerated skin opposed to 1.7 × for collagen only. Epidermal thickness increased 5.7-fold at 1 month, in line with high gene expression of S100 proteins, and decreased to 2.1 at 6 months. Increased adipose tissue and reduced scaffold degradation and number of myofibroblasts were observed for COL-HEP/GF. Gene ontology terms related to extracellular matrix (ECM) organization were enriched for both scaffold treatments. In COL-HEP/GF, ECM gene expression resembled native skin. Expression of hair follicle-related genes in COL-HEP/GF was comparable to native skin, and de novo hair follicle generation was indicated. In conclusion, in utero closure of skin defects using functionalized collagen scaffolds resulted in long-term skin regeneration and growth. Functionalized collagen scaffolds that grow with the child may be useful for prenatal treatment of closure defects like spina bifida. Impact statement Prenatal closure of fetal skin in case of spina bifida prevents damage to the spinal cord. Closure of the defect is challenging and may result in postnatal growth malformations. In this study, the postnatal effects of a prenatally applied collagen scaffold functionalized with heparin and vascular endothelial growth factor (VEGF)/fibroblast growth factor (FGF) were investigated. An increase of the surface area of regenerated skin ("growing with the child") and generation of hair follicles was observed. Gene expression levels resembled those of native skin with respect to the extracellular matrix and hair follicles. Overall, in utero closure of skin defects using heparin/VEGF/FGF functionalized collagen scaffolds results in long-term skin regeneration.

Signs of Reduced Basal Progenitor Levels and Cortical Neurogenesis in Human Fetuses with Open Spina Bifida at 11-15 Weeks of Gestation

Open spina bifida (OSB) is one of the most prevalent congenital malformations of the CNS that often leads to severe disabilities. Previous studies reported the volume and thickness of the neocortex to be altered in children and adolescents diagnosed with OSB. Until now, the onset and the underlying cause of the atypical neocortex organization in OSB patients remain largely unknown. To examine the effects of OSB on fetal neocortex development, we analyzed human fetuses of both sexes diagnosed with OSB between 11 and 15 weeks of gestation by immunofluorescence for established neuronal and neural progenitor marker proteins and compared the results with healthy controls of the same, or very similar, gestational age. Our data indicate that neocortex development in OSB fetuses is altered as early as 11 weeks of gestation. We observed a marked reduction in the radial thickness of the OSB neocortex, which appears to be attributable to a massive decrease in the number of deep- and upper-layer neurons per field, and found a marked reduction in the number of basal progenitors (BPs) per field in the OSB neocortex, consistent with an impairment of cortical neurogenesis underlying the neuronal decrease in OSB fetuses. Moreover, our data suggest that the decrease in BP number in the OSB neocortex may be associated with BPs spending a lesser proportion of their cell cycle in M-phase. Together, our findings expand our understanding of the pathophysiology of OSB and support the need for an early fetal therapy (i.e., in the first trimester of pregnancy).SIGNIFICANCE STATEMENT Open spina bifida (OSB) is one of the most prevalent congenital malformations of the CNS. This study provides novel data on neocortex development of human OSB fetuses. Our data indicate that neocortex development in OSB fetuses is altered as early as 11 weeks of gestation. We observed a marked reduction in the radial thickness of the OSB neocortex, which appears to be attributable a decrease in the number of deep- and upper-layer neurons per field, and found a marked reduction in the number of basal progenitors per field, indicating that impaired neurogenesis underlies the neuronal decrease in OSB fetuses. Our findings support the need for an early fetal therapy and expand our understanding of the pathophysiology of OSB.

Technology usage and barriers to the use of behavioral intervention technologies in adolescents and young adults with spina bifida

PURPOSE

The majority of behavioral intervention technologies (BITs) have been designed and targeted towards the general population (i.e., typically-developing individuals); thus, little is known about the use of BITs to aid those with special needs, such as youth with disabilities. The current study assessed adolescents and young adults with spina bifida (AYA-SB) for: 1) their technology usage, and 2) anticipated barriers to using technology to help manage their health.

METHODS

AYA-SB completed a survey of their media and technology usage. A card sorting task that ranked and grouped anticipated barriers to using a mobile app to manage health was also completed. Ranked means, standard deviations, and the number of times a barrier was discarded were used to interpret sample rankings.

RESULTS

AYA-SB reported less frequent technology and media use than the general population. However, differences emerged by age, with young adults endorsing higher usage than their younger counterparts. Top concerns focused on usability, accessibility, safety, personal barriers due to lack of engagement, technological functioning, privacy, and efficacy.

CONCLUSIONS

AYA-SB appear to be selective users of technology. It is therefore critical that the design of BITs address their concerns, specifically aiming to have high usability, accessibility, and engagement.

Nutrition, metabolic syndrome, and obesity: Guidelines for the care of people with spina bifida

Nutritional challenges and a lack of activity can lead to health problems across the lifespan for people with spina bifida. Children and adults with spina bifida are also at greater risk of being classified as overweight or obese compared to their peers without the condition. Therefore, early recognition of nutrition problems, weight management counseling, and timely referrals for evaluation and management of diet and activity can help those with spina bifida and their families achieve a healthy lifestyle. This article details the development of the Nutrition, Metabolic Syndrome and Obesity Guidelines, which are part of the 2018 Spina Bifida Association's Fourth Edition of the Guidelines for the Care of People with Spina Bifida. It discusses the identification and management of poor nutrition and prevention of obesity for children, adolescents, and adults with spina bifida and highlights areas requiring further research.

Mental health guidelines for the care of people with spina bifida

Spina bifida's (SB) impact on cognitive, physical, and psychosocial functioning places individuals at risk for mental health concerns. This article discusses the SB Mental Health Guidelines from the 2018 Spina Bifida Association's Fourth Edition of the Guidelines for the Care of People with Spina Bifida and reviews evidence-based directions with the intention of helping individuals with SB achieve optimal mental health throughout the lifespan. Guidelines address clinical questions pertaining to the psychosocial impact of SB on mental health and adaptation, domains of mental health that are affected in individuals with SB, areas of resilience, common maladaptive behaviors that may impact people with SB, and resources or practices that are helpful in mitigating mental health issues in this population. Gaps in the research and future directions are discussed.

Complex Cervicomedullary Junction Malformation and Hypoplastic Cerebellar Tonsils following Fetal Repair of Myelomeningocele: Case Report and Literature Review

BACKGROUND

Following the publication of the Management of Myelomeningocele study (MOMS), fetal repair of myelomeningocele (MMC) has become increasingly prevalent worldwide. However, limited case presentations exist illustrating the potential mechanical and embryological effects of fetal repair. We present a unique case report of a complex embryological cervicomedullary junction (CMJ) malformation and cerebellar hypoplasia following fetal repair of MMC.

CASE DESCRIPTION

A 1-day-old female was referred to the paediatric neurosurgical team after having successful surgical intrauterine closure of MMC abroad at 25 weeks gestation. The patient was born by emergency caesarean section at 33 weeks gestation and had a ventricular-peritoneal shunt inserted at 25 days old due to resulting hydrocephalus. Neonatal MRI scans revealed a complex number of malformations that included a split cord located at the CMJ, hypoplasia of the cerebellum and vermis, and a Chiari type II malformation.

CONCLUSION

It is possible that the clefting of the upper cervical spinal cord was undetected at preoperative MRI; however, this is unlikely given the antenatal images. It is our hypothesis that the malformation may have exhibited mechanical change after the repair, as the preoperative MRI showed only a Chiari II malformation without any of the complex abnormalities being present and the split cord was already there but not obvious. There are no existing reports of such a complex malformation following antenatal surgery in the literature. This should be further explored as more cases and trials become available.

Family functioning guidelines for the care of people with spina bifida

Research supports a resilience-disruption model of family functioning in families with a child with spina bifida. Guidelines are warranted to both minimize disruption to the family system and maximize family resilience and adaptation to multiple spina bifida-related and normative stressors. This article discusses the spina bifida family functioning guidelines from the 2018 Spina Bifida Association's Fourth Edition of the Guidelines for the Care of People with Spina Bifida, and reviews evidence-based directions with the intention of helping individuals with spina bifida achieve optimal mental health throughout their lifespan. Guidelines address clinical questions pertaining to the impact of having a child with spina bifida on family functioning, resilience and vulnerability factors, parenting behaviors that may facilitate adaptive child outcomes, and appropriate interventions or approaches to promote family functioning. Gaps in the research and future directions are discussed.

Cannabis Consumption Patterns Explain the East-West Gradient in Canadian Neural Tube Defect Incidence: An Ecological Study

While a known link between prenatal cannabis exposure and anencephaly exists, the relationship of prenatal cannabis exposure with neural tube defects (NTDs) generally has not been defined. Published data from Canada Health and Statistics Canada were used to assess this relationship. Both cannabis use and NTDs were shown to follow an east-west and north-south gradient. Last year cannabis consumption was significantly associated (P < .0001; cannabis use-time interaction P < .0001). These results were confirmed when estimates of termination for anomaly were used. Canada Health population data allowed the calculation of an NTD odds ratio) of 1.27 (95% confidence interval = 1.19-1.37; P < 10-11) for high-risk provinces versus the remainder with an attributable fraction in exposed populations of 16.52% (95% confidence interval = 12.22-20.62). Data show a robust positive statistical association between cannabis consumption as both a qualitative and quantitative variable and NTDs on a background of declining NTD incidence. In the context of multiple mechanistic pathways these strong statistical findings implicate causal mechanisms.

Camp-based psychosocial intervention dosage and changes in independence in young people with spina bifida

AIM

To examine associations between camp-based intervention dosage and changes in independence-related skills for young people with spina bifida.

METHOD

Participants were 110 individuals (mean age [SD] 14y 7mo [6y 1mo], range 6-32y; 66 females, 54 males) who attended a summer camp for individuals with spina bifida between 2 to 6 times (mean 2.40; operationalized as 'dosage'). Parents of young campers (e.g. those <18y) also participated in data collection. Campers and/or parents completed preintervention measures assessing campers' level of medical responsibility, mastery over medical tasks, and social skills. Outcomes included change in preintervention scores from dose 1 to final dose.

RESULTS

Hierarchical regression analyses with and without covariates (age, IQ, and lesion level at dose 1) revealed that increased dosage was significantly associated with greater parent-reported improvements in campers' medical responsibility and mastery over medical tasks. Increased dosage was also significantly associated with camper-report of increased medical responsibility, but this relationship was no longer significant when including covariates. Intervention dosage was not associated with changes in campers' social skills.

INTERPRETATION

Repeated participation in a camp-based intervention was associated with improvements in condition-related independence. Future work may focus on the development of interventions to promote improvements in social skills for young people with spina bifida.

WHAT THIS PAPER ADDS

Participating in an intervention over multiple summers is associated with increases in campers' responsibility for spina bifida-related tasks. Repeated summer camp intervention participation is associated with improved mastery over condition-related tasks for campers with spina bifida. Repeated camp intervention participation is not associated with changes in social skills for campers with spina bifida.

Bioengineering and in utero transplantation of fetal skin in the sheep model: A crucial step towards clinical application in human fetal spina bifida repair

An intricate problem during open human fetal surgery for spina bifida regards back skin closure, particularly in those cases where the skin defect is much too large for primary closure. We hypothesize that tissue engineering of fetal skin might provide an adequate autologous skin substitute for in utero application in such situations. Eight sheep fetuses of four time-mated ewes underwent fetoscopic skin biopsy at 65 days of gestation. Fibroblasts and keratinocytes isolated from the biopsy were used to create fetal dermo-epidermal skin substitutes. These were transplanted on the fetuses by open fetal surgery at 90 days of gestation on skin defects (excisional wounds) created during the same procedure. Pregnancy was allowed to continue until euthanasia at 120 days of gestation. The graft area was analyzed macroscopically and microscopically. The transplanted fetal dermo-epidermal skin substitutes was well discernable in situ in three of the four fetuses available for analysis. Histology confirmed healed grafts with a close to natural histological skin architecture four weeks after in utero transplantation. This experimental study generates evidence that laboratory grown autologous fetal skin analogues can successfully be transplanted in utero. These results have clinical implications as an analogous procedure might be applied in human fetuses undergoing prenatal repair to facilitate primary skin closure. Finally, this study may also fertilize the field of fetal tissue engineering in general, particularly when more interventional, minimally invasive, and open fetal surgical procedures become available.

A Longitudinal Study of Depressive Symptoms, Neuropsychological Functioning, and Medical Responsibility in Youth With Spina Bifida: Examining Direct and Mediating Pathways

Objective

Given the increased risk for cognitive deficits and development of depressive symptoms in youth with spina bifida (SB), this study aimed to examine two pathways through which depressive symptoms and neuropsychological dysfunction may be associated with medical autonomy in this population: (1) depressive symptoms as predictors of medical autonomy as mediated by attention/executive functioning (the cognitive scarring model), and (2) attention/executive functioning as predictors of medical autonomy as mediated by depressive symptoms (the cognitive vulnerability model).

Methods

Participants were recruited as part of a larger, longitudinal study, and included 114 youth with SB (M age = 10.96 at Time 1), their parents, and teachers. Neuropsychological constructs included attention, working memory, and planning/organizing abilities, which were measured with questionnaire and performance-based data. Depressive symptoms and medical responsibility were assessed via questionnaires from multiple respondents.

Results

Bootstrapped mediation analyses revealed that teacher-reported depressive symptoms significantly mediated the relations between neuropsychological functioning (i.e., attention and working memory) and medical responsibility (all p's < .05); neuropsychological dysfunction did not mediate the relationship between depressive symptoms and medical responsibility.

Conclusions

One way in which neurocognitive dysfunction may hinder the development of medical autonomy in youth with SB is through an increased risk for depressive symptoms.

Overview on neural tube defects: From development to physical characteristics

Neural tube defects (NTDs) are the second most common congenital malformations in humans affecting the development of the central nervous system. Although NTD pathogenesis has not yet been fully elucidated, many risk factors, both genetic and environmental, have been extensively reported. Classically divided in two main sub-groups (open and closed defects) NTDs present extremely variable prognosis mainly depending on the site of the lesion. Herein, we review the literature on the histological and pathological features, epidemiology, prenatal diagnosis, and prognosis, based on the type of defect, with the aim of providing important information based on NTDs classification for clinicians and scientists.

Parental Perceptions of Child Vulnerability in Families of Youth With Spina Bifida: the Role of Parental Distress and Parenting Stress

Objective

This longitudinal study aimed to investigate parental distress and parenting stress in relation to parental perception of child vulnerability (PPCV) in youth with spina bifida (SB).

Methods

Parents of 140 youth with SB (ages 8-15 years at Time 1) were recruited as part of a longitudinal study; data were collected at two time points, spaced 2 years apart. Mothers and fathers completed questionnaires assessing levels of personal distress, parenting stress, and PPCV.

Results

Mothers and fathers reported similar levels of personal distress, parenting stress, and PPCV, but reports of PPCV increased over time. For mothers, both personal distress and parenting stress were significantly associated with PPCV cross-sectionally, but not longitudinally. For fathers, there were significant cross-sectional and longitudinal associations between parenting stress and PPCV. The cross-sectional association between maternal parenting stress and PPCV was moderated by age, with a significant association only for older youth.

Conclusions

For parents of youth with SB, personal distress, and parenting stress are related to parental perceptions of child vulnerability, and child age may moderate this relationship. Parental personal distress and parenting stress are important targets for future interventions.

A 2-Step Integrative Education Program and mHealth for Self-Management in Korean Children with Spina Bifida: Feasibility Study

PURPOSE

The aim of this study was to develop and test the feasibility of a 2-step self-management program, including onsite integrative education and a mobile health (mHealth) intervention, for children with spina bifida (SB).

DESIGN AND METHODS

This feasibility study used a quasi-experimental single group pre-and post-test design. The onsite integrative education and the mHealth program, "Glowing Stars™," were developed and then tested for content validity by a panel of experts. The feasibility and user satisfaction were evaluated using factors such as school adjustment, self-management knowledge, self-efficacy, self-management behavior, and quality of life measurement by children aged 10 to 12 years with SB and their parents, from March 2018 to April 2018.

RESULTS

A total of five children with SB completed this intervention. All children perceived that this program was usable and feasible to maintain self-management behavior. A statistically significant difference was observed in the children's self-management behavior domain between the first and second post-test (p = .043).

CONCLUSION

This innovative 2-step self-management intervention program complements existing single interventions and confirms the possibility of mHealth technology as an intervention for children with SB.

PRACTICE IMPLICATIONS

In pediatric nursing, this innovative intervention could be adapted for children with chronic conditions, with a positive effect on self-management.

Exploring an Existing Weight Management App for Use With Adolescents and Young Adults With Spina Bifida: Usability Study

BACKGROUND

Adolescents and young adults with spina bifida (AYA-SBs) have unique user needs, given their variable and complex symptom profile. Owing to multiple barriers to prevention and intervention treatments for secondary conditions (eg, obesity), AYA-SBs may benefit from the use of behavioral intervention technologies (BITs). However, as BITs are often designed and tested with typically developing individuals, it is unclear if existing BITs may be usable for AYA-SBs.

OBJECTIVE

This study aimed to evaluate the usability of a high-quality, publicly available, weight management-focused mobile BIT (smartphone app) for AYA-SBs.

METHODS

Overall, 28 AYA-SBs attending a Young Men's Christian Association-based summer camp completed 4 structured usability tasks using a weight management app designed for the general public called My Diet Coach (Bending Spoons). Learnability was measured by (1) time to complete task, (2) number of user errors, and (3) correct entry of data when requested by the app. Satisfaction and general usability were measured via self-reported questionnaires and qualitative feedback following interactions with the app.

RESULTS

The majority of the sample were able to complete the tasks, with increased completion rates and improved times on second attempts of the tasks (Ps<.05). Errors were common, and discrepancies emerged between quantitative and qualitative feedback such that self-reported measures indicated dissatisfaction but qualitative feedback was generally positive. Suggested improvements to the app included (1) tutorials, (2) simplifying the design, (3) more activity options for those who ambulate by wheelchair, and (4) notifications to prompt use.

CONCLUSIONS

AYA-SBs were able to learn how to complete specific tasks independently on a weight management app, but design changes consistent with previously proposed user needs were recommended. Rather than designing entirely new BITs, it may be possible to adapt existing technologies to personalize BITs for specific populations such as AYA-SBs.

Debutant iOS app and gene-disease complexities in clinical genomics and precision medicine

Background

The last decade has seen a dramatic increase in the availability of scientific data, where human-related biological databases have grown not only in count but also in volume, posing unprecedented challenges in data storage, processing, analysis, exchange, and curation. Next generation sequencing (NGS) advancements have facilitated and accelerated the process of identifying genetic variations. Adopting NGS with Whole-Genome and RNA sequencing in a diagnostic context has the potential to improve disease-risk detection in support of precision medicine and drug discovery. Several bioinformatics pipelines have been developed to strengthen variant interpretation by efficiently processing and analyzing sequence data, whereas many published results show how genomics data can be proactively incorporated into medical practices and improve utilization of clinical information. To utilize the wealth of genomics and health, there is a crucial need to generate appropriate gene-disease annotation repositories accessed through modern technology.

Results

Our focus here is to create a comprehensive database with mobile access to actionable genes and classified diseases, considered the foundation for clinical genomics and precision medicine. We present a publicly available iOS app, PAS-Gen, which invites global users to freely download it on iPhone and iPad devices, quickly adopt its easy to use interface, and search for genes and related diseases. PAS-Gen was developed using Swift, XCODE, and PHP scripting that uses Web and MySQL database servers, which includes over 59,000 protein-coding and non-coding genes, and over 90,000 classified gene-disease associations. PAS-Gen is founded on the clinical and scientific premise that easier healthcare and genomics data sharing will accelerate future medical discoveries.

Conclusions

We present a cutting-edge gene-disease database with a smart phone application, integrating information on classified diseases and related genes. The PAS-Gen app will assist researchers, medical practitioners, and pharmacists by providing a broad and view of genes that may be implicated in the likelihood of developing certain diseases. This tool with accelerate users’ abilities to understand the genetic basis of human complex diseases and by assimilating genomic and phenotypic data will support future work to identify gene-specific designer drugs, target precise molecular fingerprints for tumors, suggest appropriate drug therapies, predict individual susceptibility to disease, and diagnose and treat rare illnesses.

Antenatal ultrasound compared to MRI evaluation of fetal myelomeningocele: a prenatal and postnatal evaluation

Background Spina bifida affects 0.5-1 in 1000 pregnancies in the United States and is often diagnosed in the mid-second trimester. The objective of the study was to directly compare ultrasounds (US) and magnetic resonance imaging (MRI) obtained in the antenatal period in the diagnosis and localization of fetal myelomeningocele (MMC) and compare these with the postnatal outcomes of these infants Methods A retrospective analysis of patients referred to the Fetal Care Center at the Cleveland Clinic from 2005 to 2017. US and MRIs were obtained from the Cleveland Clinic electronic medical record. Infants were followed-up at an interdisciplinary myelomeningocele pediatrics clinic. Results MRI and US varied in correlation with physical exam at the time of birth and surgery. While no differences were detected in demographics, pregnancy outcomes or pediatric outcomes, it was noted that the majority of patients developed neurogenic bladders irrespective of the lesion level. Conclusion MRI is not superior to US in the diagnosis of MMC. Pregnancies complicated by MMC do not vary in morbidity, and pediatric outcomes remain similar regardless of the lesion level. This data provides additional information for the counseling of patients when faced with this antenatal diagnosis.

Inadequate Folic Acid Intake Among Women Taking Antiepileptic Drugs During Pregnancy in Japan: A Cross-Sectional Study

This study aimed to assess characteristics of pregnant women taking antiepileptic drugs with inadequate folic acid intake. This cross-sectional study examined pregnant women taking antiepileptic drugs who were registered in the Japanese Drug Information Institute in Pregnancy (JDIIP) database between October 2005 and December 2016. Participants were classified into two groups according to when they started folic acid supplementation (before pregnancy: 'adequate', after pregnancy or never: 'inadequate'). Logistic regression analysis was performed to investigate factors associated with inadequate folic acid intake. Of 12,794 registrants, 468 pregnant women were taking antiepileptics during the first trimester. Of these, we analysed data from 456 women who had no missing data. As a result, inadequate folic acid intake was noted among 83.3% of them, suggesting that the current level of folic acid intake is insufficient overall. Younger age, smoking, alcohol drinking, multiparity, unplanned pregnancy, and being prescribed AEDs by paediatric or psychiatric departments were independent factors associated with inadequate folic acid intake. As planned pregnancy was the strongest factor, healthcare professionals should ensure that childbearing women taking antiepileptics are informed of the importance of planned pregnancy. In addition, healthcare professionals must gain a better understanding of folic acid intake, as the prevalence of adequate intake differed according to which departments prescribed antiepileptic drugs.

Extracellular Vesicles as a Potential Therapy for Neonatal Conditions: State of the Art and Challenges in Clinical Translation

Despite advances in intensive care, several neonatal conditions typically due to prematurity affect vital organs and are associated with high mortality and long-term morbidities. Current treatment strategies for these babies are only partially successful or are effective only in selected patients. Regenerative medicine has been shown to be a promising option for these conditions at an experimental level, but still warrants further exploration for the development of optimal treatment. Although stem cell-based therapy has emerged as a treatment option, studies have shown that it is associated with potential risks and hazards, especially in the fragile population of babies. Recently, extracellular vesicles (EVs) have emerged as an attractive therapeutic alternative that holds great regenerative potential and is cell-free. EVs are nanosized particles endogenously produced by cells that mediate intercellular communication through the transfer of their cargo. Currently, EVs are garnering considerable attention as they are the key effectors of stem cell paracrine signaling and can epigenetically regulate target cell genes through the release of RNA species, such as microRNA. Herein, we review the emerging literature on the therapeutic potential of EVs derived from different sources for the treatment of neonatal conditions that affect the brain, retinas, spine, lungs, and intestines and discuss the challenges for the translation of EVs into clinical practice.

SOX3 duplication: A genetic cause to investigate in fetuses with neural tube defects

OBJECTIVE

Neural tube defects (NTDs) are one of the most common congenital anomalies caused by a complex interaction of many genetic and environmental factors. In about 10% of cases, NTDs are associated with genetic syndromes or chromosomal anomalies. Among these, SOX3 duplication has been reported in some isolated cases. The phenotype associated with this microduplication is variable and includes myelomeningocele (MMC) in both sexes as well as hypopituitarism and cognitive impairment in males. In order to determine the prevalence of this anomaly in fetuses with MMC, a retrospective cohort of fetuses with MMC was analyzed by quantitative PCR (qPCR) targeting SOX3 locus.

METHODS

The detection of an SOX3 microduplication by chromosomal microarray analysis (CMA) in two female fetuses with MMC prompted us to analyze retrospectively by qPCR this gene in a cohort of 53 fetuses with MMC.

RESULTS

In addition to our two initial cases, one fetus harboring an Xq27.1q28 duplication that encompasses the SOX3 gene was detected.

CONCLUSION

Our data demonstrate that SOX3 duplication is a genomic imbalance involved in the pathogenesis of NTDs. In addition, our survey highlights the importance of CMA testing in fetuses with NTDs to enable genetic counseling upstream of any considerations of in utero fetal surgery.

Fetal myelomeningocele repair

Myelomeningocele is a congenital malformation that causes a spectrum of morbidity. With the standard of care now being in utero repair, the spectrum of morbidity has changed. The purpose of this article is to review the diagnosis, workup and treatment options of fetal myelomeningocele. We also review the obstetrical, neurological, gastrointestinal, urinary, and orthopedic outcomes of the in utero myelomeningocele repair.

Awareness of spina bifida among family of affected child. A cross sectional questionnaire

Objectives:

To evaluate the awareness of spina bifida (SB), risk factors and possible preventive measures among mothers who had been following in our clinic with a spina bifida affected child.

Methods:

A cross-sectional questionnaire-based study with 38 mothers of SB patients who are following at SB and hydrocephalus clinic at King Fahad University Hospital, Khobar, Eastern Province, Saudi Arabia.

Results:

Thirty-eight mother were included in this questionnaire. Most of the participants were Saudi (94.7%). Ten out of 38 women (26.3%) had used medications during pregnancy (pain medications and herbal drugs), 4 out of 38 (10.5%) had been exposed to imaging radiation, while 9 (23.7%) had experienced moderate to high grade fever (39-41°C) during pregnancy. Moreover, the majority (86.8%) of these women did not receive folic acid (FA) before pregnancy, and 42.1% of them did not have FA during their first trimester. Only one (2.6%) gave positive family history of SB while, 6 (15.8%) reported having other SB children.

Conclusion:

There is a considerably low level of awareness in mothers of SB patients despite prevalence of this anomaly in the Eastern province. This necessitates an effort from health care providers to educate the community about this birth defect entity. Furthermore, genetic counseling should be encouraged especially in those who have a positive familial history for better understanding. Also, larger sample size with randomized controlled trials and larger epidemiological studies should be implemented.

Parents' Needs Concerning Their Children with Spina Bifida in South Korea: A Mixed Method Study

PURPOSE

This study aimed to determine the needs of children with spina bifida (SB) and their families from their parents' perspective in South Korea.

DESIGN AND METHODS

This was a convergent mixed methods study design. From December 2016 to February 2017, parents of children with SB participated in a quantitative prospective observational study (N = 164), using the Family Needs Assessment Tool. Qualitative focus group interviews were conducted, according to three developmental stages (N = 15) in May 2017. Integrated analyses were conducted jointly by merging the quantitative and qualitative findings.

RESULTS

Quantitative findings revealed very high parental needs in three assessment domains: information, healthcare service/program, and difficulties related to healthcare. Ten qualitative themes were identified in these 3 domains. Quantitative and qualitative methods enabled more extensive findings. Comparison and merging of the data resulted in six confirmed and four expanded findings. In particular, we identified the need for a child-focused self-management program, a bladder/bowel disability awareness program, welfare policies, and partnership with healthcare professionals as the expanded findings.

CONCLUSION

This mixed method study provided empirical evidence to help better understand the complex needs of parents of children with SB.

PRACTICE IMPLICATIONS

When developing and providing healthcare education and service to families of children with SB, especially, in countries where SB educational programs have not been established yet, it is important to develop them based on their own needs, which may vary based on the child's developmental stage and socio-cultural characteristics.

50 Years and older - born with spina bifida: participation, health issues and physical function

Purpose: To study physical function perspectives in persons with spina bifida (SB) aged ≥50 years. In relation to this, we also wanted to survey participation perspectives, health issues and health services usage.Methods: We used predefined fixed questions to interview community-dwelling adults with SB in Norway. Physical function assessments included Timed Up and Go, the Six Minute Walk Test, and BMI was calculated. Descriptive statistics were used, and logistic regression was performed to study variables associated with community walking.Results: Eighteen women and twelve men, twenty-four of them without hydrocephalus, participated in the study. Their mean age was 57.5 years (range 51-76). The majority were well-functioning persons, with 53% employed. However, deterioration in ambulation started at a median age of 40 years in >80% of the participants. Higher odds for being a community walker were found for sacral SB, BMI < 30, and/or being more physical active per week. More than 60% of the study sample used antihypertensive medication, and 43% were obese (BMI ≥ 30). Pain was a commonly perceived health problem. About 50% had been through a comprehensive SB-specific health evaluation in adulthood.Conclusion: The striking results on obesity, hypertension, pain and deterioration in ambulatory function in middle-aged and elderly SB cases call for action. Our findings elucidate the importance of prevention and clinical follow-up throughout the lifespan, even in well-functioning SB cases.Implications for rehabilitationWeight-management and interventions to reduce hypertension are issues that need attention in follow-up and as part of secondary rehabilitation in spina bifida.Early deterioration in ambulatory function and pain in spina bifida are target areas for multidisciplinary secondary rehabilitation, and should adequately focus on maintaining or improving "real-life" functioning performance.Neurogenic bowel and fecal incontinence are important in relation to social participation in ageing spina bifida.Rehabilitation programs and research should take the level of cele and hydrocephalus into account.

Friendship Quality Over Time in Youth With Spina Bifida Compared to Peers

OBJECTIVE

Examine friendship qualities (i.e., control, prosocial skills, positive affect, support, companionship, conflict, help, security, and closeness) and perceived self-efficacy in friendships of children with spina bifida (SB) and chosen peers over time through observed behaviors and self-report.

METHODS

Families of children with SB (aged 8-15) were asked to invite the child's "best friend" to participate in-home assessment visits; 127 friendship dyads were included in the current study. Mixed-effects models were used to examine children with SB and their peers across age on observed behaviors and self-reported data about their friendships.

RESULTS

For observed behaviors, peers displayed more control (p = .002) and prosocial behaviors (p = .007) with age than youth with SB. Male peers displayed higher control in their interactions as they aged (p = .04); and males with SB maintained their level of prosocial behaviors with age, compared to an increase in prosocial behaviors with age for all other groups (p = .003). For self-reported data, there was no evidence to suggest significant differences in friendship qualities across age (ps ≥ .2), with the exception of increased help (p = .002). Female peers reported increases in companionship across age compared to the other groups (p = .04).

CONCLUSIONS

Differing from previous examinations of social characteristics in SB, most longitudinal trends in friendship qualities did not differ for youth with SB compared to their peers. Promotion of this existing social strength may be a key intervention target for future strategies that promote positive outcomes for youth with SB.

The Use of Indomethacin with Complete Amniotic Fluid Replacement and Classic Hysterotomy for the Reduction of Perinatal Complications of Intrauterine Myelomeningocele Repair

OBJECTIVE

This study presented outcomes of classical hysterotomy with modified antiprostaglandin therapy for intrauterine repair of foetal myelomeningocele (fMMC) performed in a single perinatal centre.

STUDY DESIGN

Forty-nine pregnant women diagnosed with fMMC underwent classic hysterotomy with anti-prostaglandin management, complete amniotic fluid replacement and high dose indomethacin application.

RESULTS

The average gestational age (GA) at delivery was 34.4 ± 3.4 weeks, with no births before 30 weeks GA. There were 2 foetal deaths. Complete reversal of hindbrain herniation (HH), assessed in magnetic resonance imaging at 30-31 weeks GA was found in 72% of foetuses (mostly with HH grade I prior to fMMC repair). Our protocol resulted in rare use of magnesium sulphate (6%), low incidence of chorioamniotic membrane separation - chorioamniotic membrane separation (6%), preterm premature rupture of membranes - preterm premature rupture of membranes (pPROM; 15%) and preterm labour - preterm labour (PTL; 17%). The postoperative wound continuity of the uterus was usually stable (in 72% of patients), with low frequency of scar thinning (23%).

CONCLUSION

Our protocol results in rare use of tocolytics, and the low occurrences of CMS, pPROM and PTL in relation to other study cohorts: Management of Myelomeningocele Study, Children's Hospital of Philadelphia, and Vanderbilt University Medical Centre.

DNA methylome of human neonatal umbilical cord: Enrichment of differentially methylated regions compared to umbilical cord blood DNA at transcription factor genes involved in body patterning and effects of maternal folate deficiency or children's sex

The DOHaD (developmental origins of health and disease) hypothesis claims that fetal malnutrition or exposure to environmental pollutants may affect their lifelong health. Epigenetic changes may play significant roles in DOHaD; however, access to human fetuses for research has ethical and technical hurdles. Umbilical cord blood (CB) has been commonly used as an epigenetic surrogate of fetuses, but it does not provide direct evidence of fetal exposure to pollutants. Here, we propose umbilical cord tissue (UC), which accumulates substances delivered to fetuses during gestation, as an alternative surrogate for epigenetic studies on fetuses. To explore the feasibility to examine UC epigenome by deep sequencing, we determined CpG methylation profiles of human postnatal UC by reduced representation bisulfite sequencing. Principal component analysis clearly separated the DNA methylomes of UC and CB pairs isolated from the same newborn (n = 10). Although all UC chromosomes were modestly hypomethylated compared to CB chromosomes, GO analysis revealed strong enrichment of differentially methylated regions (DMRs) at promoter-associated CpG islands in the HOX gene clusters and other genes encoding transcription factors involved in determination of the body pattern. DNA methylomes of UC autosomes were largely comparable between males and females. Deficiency of folate during pregnancy has been suggested to affect fetal DNA methylation to cause congenital anomalies. Whereas DNA methylome of UC was not significantly affected by early-gestational (12 weeks) low levels of maternal plasma folate (< 8 ng/ml, n = 10) compared to controls (>19 ng/mL, n = 10), two specific loci of LTR12C endogenous retroviruses in chromosome 12 were significantly hypermethylated in the low-folate group. Our study suggests that UC is useful as an alternative surrogate for studying environmental effects on DNA methylation in human fetuses, compensating CB by providing additional information about epigenetic regulation of genes involved in developmental body patterning and endogenous retroviruses.

Health behaviors and disordered eating in adolescents and young adults with spina bifida: results from a national survey

Purpose: Youth with disabilities are at higher risk for obesity, disordered eating, and poor body image but are often excluded from research on these domains. The current study is the first to characterize health behaviors, body mass index, and disordered eating cognitions and behaviors in a national sample of adolescent and young adult males and females with spina bifida.Methods: Participants were recruited nationally through the support of a national spina bifida-related organization to complete an anonymous survey assessing health behaviors and disordered eating.Results: Participants were primarily Caucasian, had myelomeningocele, and were between 15-24 years of age. Body mass indices ranged from underweight to Class Three obesity. Health behaviors (e.g., healthy food consumption, physical activity) were often subthreshold compared to Centers for Disease Control recommendations made to the general public. Both male and female respondents endorsed higher purging and restricting behaviors than norms established with typically-developing college aged peers.Conclusions: Findings revealed that there are few sex-based differences. Additionally, the need for thorough assessment of disordered eating behaviors in this population is warranted, including those with a lower body mass index who might be overlooked for assessment of unhealthy attempts to lose or maintain their weight.Implications for rehabilitationAdolescents and young adults with spina bifida are often advised to lose weight without clear guidelines on how to do so, putting them at risk for disordered eating.Professionals should expect variable body mass indices in this population, with some health behaviors falling short of recommendations made for the general public by the Centers for Disease Control.Professionals should fully assess disordered eating behaviors in youth with disabilities, even when at a healthy weight.

Dizygotic opposite-sex twins with surgically repaired concordant myelomeningocele conceived by in vitro fertilization using intracytoplasmic sperm injection: a case report and review of the literature

BACKGROUND

Myelomeningocele (MMC) is a common subtype of congenital neural tube defects (NTD). Although congenital malformations including NTD are more common in twins, concordance, especially in dizygotic twins, is extremely rare and is found mostly in same-sex twins. The role of genetic and environmental factors in the etiology of MMC is unclear.

CASE REPORT

Dizygotic twins of opposite sex were born at term to a 35-year-old woman conceived with in vitro fertilization (IVF) using intracytoplasmic sperm injection (ICSI). Prenatal ultrasonography (US) revealed concordant lumbosacral MMC at 18 weeks of gestation as well as ventriculomegaly and Arnold-Chiari malformation type II at 28 weeks. Both twins underwent surgical repair of the MMC within 48 h after birth and required a ventriculoperitoneal shunt in the second week of life.

DISCUSSION

The case presented raises questions concerning the etiology of MMC, since in twins, it is compelling to attribute the etiology to genetic factors. In the literature, 22 pairs of twins with concordant MMC have been reported, and of the 10 dizygotic twins described, four were of opposite sex. However, in monozygotic twins, most of the cases are non-concordant; therefore, the role of genetics remains unclear. In addition, environmental factors such as nutrition, metabolic folic acid deficiency, and assisted conception with IVF and ICSI might play a role as well.

CONCLUSION

The appearance of concordant MMC in opposite-sex dizygotic twins, conceived by IVF using ICSI, intrigues questions concerning the etiology of MMC. In such cases, genetic counseling and evaluation should be considered.

Adaptation and Resilience in Families of Children With Spina Bifida in South Korea

PURPOSE

The purpose of this study, which was guided by the Family Resilience Model, was twofold: (1) to assess the risk and protective factors related to adaptation and resilience in families of children with spina bifida (SB) in South Korea and (2) to examine predictors of family adaptation and resilience.

DESIGN

This is a descriptive study using survey methodology.

METHODS

Data were collected from 203 parents of children with SB between June 2013 and February 2014 at the SB clinic in South Korea and analyzed using stepwise linear regression.

FINDINGS

The best predictors of family adaptation and resilience in children with SB included one risk factor (parental depression) and four protective factors (parental health, family cohesion, family communication skills, and supportive friends/relatives). These five factors explained 39.7% of the total variance in family functioning (an indicator of family adaptation and resilience; F = 26.43, p < .001).

CONCLUSION AND CLINICAL RELEVANCE

Findings suggest that nursing interventions designed to strengthen protective factors and reduce risk factors are likely to promote adaptation and resilience in families of children with SB.

Prenatal brain imaging for predicting need for postnatal hydrocephalus treatment in fetuses that had neural tube defect repair in utero

OBJECTIVE

To determine if brain imaging in fetuses that underwent prenatal repair of neural tube defect (NTD) can predict the need for postnatal hydrocephalus treatment (HT) in the first year postpartum.

METHODS

This was a retrospective study of fetuses diagnosed with open NTD that had in-utero myelomeningocele repair between April 2014 and April 2016. Independent variables were collected from four chronological sets of fetal images: presurgery ultrasound, presurgery magnetic resonance imaging (MRI), 6-week postsurgery MRI and predelivery ultrasound. The following independent variables were collected from all image sets unless otherwise noted: gestational age, head circumference, mean ventricular width, ventricular volume (MRI only), hindbrain herniation (HBH) score (MRI only), and level of lesion (LOL), defined as the upper bony spinal defect (presurgery ultrasound only). Based on these measurements, additional variables were defined and calculated including change in degree of HBH, ventricular width growth (mm/week) and ventricular volume growth (mL/week). The need for HT (by either ventriculoperitoneal shunt or endoscopic third ventriculostomy with choroid plexus cauterization) was determined by a pediatric neurosurgeon using clinical and radiographic criteria; a secondary analysis was performed using the MOMS trial criteria for hydrocephalus. The predictive value of each parameter was assessed by receiver-operating characteristics curve and logistic regression analyses.

RESULTS

Fifty affected fetuses were included in the study, of which 32 underwent open hysterotomy and 18 fetoscopic repair. Two neonates from the open hysterotomy group died and were excluded from the analysis. The mean gestational ages for the presurgery ultrasound, presurgery MRI, postsurgery MRI and predelivery ultrasound were 21.8 ± 2.1, 22.0 ± 1.8, 30.4 ± 1.6 and 31.0 ± 4.9 weeks, respectively. A total of 16 subjects required HT. The area under the curve (AUC) of predictive accuracy for HT showed that HBH grading on postsurgery MRI had the strongest predictive value (0.86; P < 0.01), outperforming other predictors such as postsurgery MRI ventricular volume (0.73; P = 0.03), MRI ventricular volume growth (0.79; P = 0.01), change in HBH (0.82; P = 0.01), and mean ventricular width on predelivery ultrasound (0.73; P = 0.01). Other variables, such as LOL, mean ventricular width on presurgery ultrasound, mean ventricular width on presurgery and postsurgery MRI, and ventricular growth assessment by MRI or ultrasound, had AUCs < 0.7. Optimal cut-offs of the variables with the highest AUC were evaluated to improve prediction. A combination of ventricular volume growth ≥ 2.02 mL/week and/or HBH of 3 on postsurgery MRI were the optimal cut-offs for the best prediction (odds ratio (OR), 42 (95% CI, 4-431); accuracy, 84%). Logistic regression analyses showed that persistence of severe HBH 6 weeks after surgery by MRI is one of the best predictors for HT (OR, 39 (95% CI, 4-369); accuracy, 84%). There was no significant change in the results when the MOMS trial criteria for hydrocephalus were used as the dependent variable.

CONCLUSIONS

Persistence of HBH on MRI 6 weeks after prenatal NTD repair independently predicted the need for postnatal HT better than any ultrasound- or other MRI-derived measurements of ventricular characteristics. These results should aid in prenatal counseling and add support to the hypothesis that HBH is a significant driver of hydrocephalus in myelomeningocele patients. Copyright © 2019 ISUOG. Published by John Wiley & Sons Ltd.

Role of Neurocognitive Factors in Academic Fluency for Children and Adults With Spina Bifida Myelomeningocele

OBJECTIVES

Fluency is a major problem for individuals with neurodevelopmental disorders, including fluency deficits for academic skills. The aim of this study was to determine neurocognitive predictors of academic fluency within and across domains of reading, writing, and math, in children and adults, with and without spina bifida. In addition to group differences, we expected some neurocognitive predictors (reaction time, inattention) to have similar effects for each academic fluency outcome, and others (dexterity, vocabulary, nonverbal reasoning) to have differential effects across outcomes.

METHODS

Neurocognitive predictors were reaction time, inattention, dexterity, vocabulary, and nonverbal reasoning; other factors included group (individuals with spina bifida, n=180; and without, n=81), age, and demographic and untimed academic content skill covariates. Univariate and multivariate regressions evaluated hypotheses.

RESULTS

Univariate regressions were significant and robust (R 2 =.78, .70, .73, for reading, writing, and math fluency, respectively), with consistent effects of covariates, age, reaction time, and vocabulary; group and group moderation showed small effect sizes (&lt;2%). Multivariate contrasts showed differential prediction across academic fluency outcomes for reaction time and vocabulary.

CONCLUSIONS

The novelty of the present work is determining neurocognitive predictors for an important outcome (academic fluency), within and across fluency domains, across population (spina bifida versus typical), over a large developmental span, in the context of well-known covariates. Results offer insight into similarities and differences regarding prediction of different domains of academic fluency, with implications for addressing academic weakness in spina bifida, and for evaluating similar questions in other neurodevelopmental disorders. (JINS, 2019, 25, 249-265).