Project description:Spinal muscular atrophy (SMA) is one of the most common severe hereditary diseases of infancy and early childhood. The progression of this illness causes a high degree of disability; hence, a significant burden is experienced by individuals with this disease and their families. We analyzed the time taken to care for patients suffering from SMA in European countries and the burden on their informal caregivers. We designed a cross-sectional study recording data from France, Germany, Spain and the United Kingdom. The primary caregivers completed a self-administered questionnaire that included questions about the time of care, The Zarit Burden Interview, type of SMA and socio-demographic characteristics. Multivariate analyses were used to study the associations between the type of SMA, time of care and burden supported by informal caregivers. The caregivers provided 10.0 h (SD = 6.7) per day of care (the principal caregivers provided 6.9 h, SD = 4.6). The informal caregivers of patients with type I SMA had a 36.3 point higher likelihood (p < 0.05) of providing more than 10 h of care per day in comparison with caregivers of patients with type III SMA. The severity of the disease was associated with more time of care and a higher burden on the caregivers.
Project description:BackgroundSpinal muscular atrophy (SMA) is a neuromuscular disorder characterized by muscle atrophy and weakness. SMA type 1 (SMA1) is the most severe form: affected infants are unable to sit unaided; SMA type 2 (SMA2) children can sit, but are not able to walk independently. The Standards of Care has improved quality of life and the increasing availability of disease-modifying treatments is progressively changing the natural history; so, the clinical assessment of nutritional status has become even more crucial. Aims of this multicenter study were to present the growth pattern of treatment-naïve SMA1 and SMA2, and to compare it with the general growth standards.ResultsBody Weight (BW, kg) and Supine Length (SL, cm) were collected using a published standardized procedure. SMA-specific growth percentiles curves were developed and compared to the WHO reference data. We recruited 133 SMA1 and 82 SMA2 (48.8% females). Mean ages were 0.6 (0.4-1.6) and 4.1 (2.1-6.7) years, respectively. We present here a set of disease-specific percentiles curves of BW, SL, and BMI-for-age for girls and boys with SMA1 and SMA2. These curves show that BW is significantly lower in SMA than healthy peers, while SL is more variable. BMI is also typically lower in both sexes and at all ages.ConclusionsThese data on treatment-naïve patients point toward a better understanding of growth in SMA and could be useful to improve the clinical management and to assess the efficacy of the available and forthcoming therapies not only on motor function, but also on growth.
Project description:Spinal muscular atrophy (SMA) is a potentially devastating and lethal neuromuscular disease frequently manifesting in infancy and childhood. The discovery of the underlying mutation in the survival of motor neurons 1 (SMN1) gene has accelerated preclinical research, leading to treatment targets and transgenic mouse models, but there is still no effective treatment. The clinical severity is inversely related to the copy number of SMN2, a modifying gene producing some full-length SMN transcript. Drugs shown to increase SMN2 function in vitro, therefore, have the potential to benefit patients with SMA. Because several drugs are now on the horizon of clinical investigation, we review recent clinical trials for SMA and discuss the challenges and opportunities associated with SMA drug development. Although an orphan disease, SMA is well-positioned for successful trials given that it has a common genetic etiology in most cases, that it can be readily diagnosed, that preclinical research in vitro and in transgenic animals has identified candidate compounds, and that trial networks have been established.
Project description:BackgroundSpinal muscular atrophy (SMA) is a rare neurodegenerative disease characterized by progressive muscular weakness, which occurs in one in 6,000 to 10,000 live births. The burden of SMA on Canadian patients and caregivers is not known.ObjectiveTo characterize the burden of SMA in Canada as reported by patients and caregivers, including disease and treatment impacts, indirect costs, and caregiver burden.MethodsSurveys were distributed by Cure SMA Canada and Muscular Dystrophy Canada to individuals with SMA and their caregivers. The online surveys were anonymous and completed between January 28 and February 21, 2020.Results965 patient and 962 caregiver responses met the eligibility criteria. Patients reported SMA subtypes as: type I (25.0%), type II (41.3%), type III (29.3%). Using the EQ-5D, patients were shown to have impaired quality of life with an average health utility index of 0.49 (SD: 0.26). The median expenditure was $4,500 CAD (IQR: $1,587 - $11,000) for assistive devices; $6,800 CAD (IQR: $3,900-$13,000) on health professional services; and $1,200 CAD (IQR: $600 -$3,100) on SMA-related travel and accommodation in the past 12 months. Caregivers reported needing respite care (45.7%), physiotherapy for an injury from a lift/transfer (45.7%), or other health impacts (63.3%). Caregivers reported changes to personal plans, sleep disturbances, and work adjustments, with a mean Caregiver Strain Index score of 7.5 [SD: 3.3].ConclusionSMA in Canada is associated with a significant burden for patients and their caregivers.
Project description:BackgroundSpinal muscular atrophy (SMA) is an autosomal-recessive motor neuron disease leading to dysfunction of multiple organs. SMA can impair the quality of life (QoL) of patients and family. We aimed to evaluate the QoL of children with SMA and their caregivers and to identify the factors associated with QoL in a cross-sectional study conducted in China.MethodsWe recruited 101 children aged 0-17 years with SMA and their caregivers from a children's hospital in China. Twenty-six children had type I SMA, 56 type II and 19 type III. Each child's QoL was measured by the Pediatric Quality of Life Inventory 3.0 Neuromuscular Module (PedsQL NMM), which was completed by the child's caregivers. The caregiver's QoL was measured by the Pediatric Quality of Life Inventory Family Impact Module (PedsQL FIM). Information on sociodemographic characteristics, disease-specific characteristics, and treatments were collected using the proxy-reported questionnaire. Two-sample t tests and one-way ANOVA were used to compare differences in average scores of QoL across subgroups.ResultsChildren with type III SMA had a higher average Total score of PedsQL NMM and higher average scores in domains Neuromuscular disease and Family resources than children with type I or type II SMA (p < 0.001). Caregivers of children with type III SMA reported higher average scores in the domains of Physical, Emotional, Social, and Cognitive functioning of the PedsQL FIM than those of children with types I or II SMA (p < 0.05). In addition, disease-related characteristics (e.g. limited mobility, stable course of disease, skeleton deformity, and digestive system dysfunction) and respiratory support were associated with lower average scores of PedsQL NMM and PedsQL FIM (p < 0.05). Exercise training, multidisciplinary team management and use of the medication Nusinersen were each associated with higher average scores in both PedsQL NMM and FIM (p < 0.05).ConclusionOur study has demonstrated factors that may impair or improve QoL of children patients with SMA and their parents. Particularly, QoL was relatively poor in children with type I and type II SMA as well as in their caregivers compared to those with type III SMA. We strongly recommend that standard of care in a multidisciplinary team be strengthened to improve the QoL of SMA patients. Our study called for increased attention from clinical physicians on measuring QoL in their clinical practices in order to enhance the understanding of impacts of SMA and to make better decisions regarding treatment.
Project description:AimThis study aims to reveal the problems faced by families of children with spinal muscular atrophy (SMA), by evaluating their care burden, needs, and expectations.Materials and methodsThe participants were the primary caregivers of 34 children between the ages of 0 and 18 years diagnosed with SMA. Thirteen children were diagnosed with type 1, 13 children with type 2 and 8 children with type 3 SMA. Data on the medical history, functional levels of the participants, and the characteristics of families were collected. The childrens' parents completed the Family Needs Survey and the Zarit Caregiver Burden Scale.ResultsAccording to the results of the Family Needs Survey, it was found that information was the most common requirement, and this was independent of the level of education. According to the Caregiver Burden Scale, it was recorded that 64.7% of the caregivers were under mild/moderate burden. While there was a moderate correlation (r = 0.574; P < .001) between the Caregiver Burden Scale and the Family Needs Survey, it was observed that the functional level of the child was not associated with family needs and caregiver burden.ConclusionsOur study suggests that the needs of families of SMA patients, especially related to income level, have changed. The caregivers' burden is not directly related to the income level or the functional level of the child. Families' need for information should also be prioritized within the rehabilitation program.
Project description:Spinal muscular atrophy (SMA) is a progressive recessive genetic disease. Early identification is critical for achieving maximal treatment benefit. Survival motor neuron (SMN) 2 copy number may be a needed descriptor of disease severity than SMA type. Therefore, we assessed knowledge of SMN2 copy number among those with SMA and their caregivers via a phone survey. Only patients with SMA (or their caregivers) registered in the Cure SMA database with no SMN2 copy number on file were eligible. Descriptive results are reported. Backward stepwise multinomial logistic regressions determined if specific factors predicted knowledge of SMN2 copy number. Engagement with the SMA community (odds ratio [OR] 1.82; p<0.0001), ability to walk (OR 1.74; p = 0.006), and current age at time of survey (OR = 0.98; p<0.0001) each positively predicted knowledge of SMN2 copy number. Of 806 completed surveys, the majority (n = 452; 56.3%) did not know SMN2 copy numbers for themselves (n = 190; 62.5%) or their loved ones (n = 261; 52.4%). Of these, 66 respondents (8.2%) said genetic testing had not been done. Motor function increased linearly with increasing SMN2 copy number. SMN2 copy number is emerging as a critical descriptor of severity for SMA as type becomes more obsolete with early drug treatment. Communication of SMN2 copy numbers is recommended as a standard part of the treatment plan.
Project description:AimTo gain insight into parents' perspectives about their decision-making process concerning nusinersen treatment for their child, including perceived needs and concerns, and to explore factors that influence this process.MethodThis was an exploratory qualitative interview study among parents of children with spinal muscular atrophy types 1 to 3. Data were analysed using inductive thematic analysis.ResultsNineteen parents of 16 children representing 13 families participated. A wide variety of perspectives was reported ranging from a biomedical approach, which focused on battling the disease, to a holistic approach, which aimed for a good quality of life for their child. The most important factors that helped parents to decide were honest and neutral communication with their physician and access to available information.InterpretationIt is important physicians understand that there are different perspectives influencing the decision-making process. Physicians should create an environment that allows parents to accept or reject treatment by communicating honestly and openly with them and by discussing both options extensively. Clear information about pros and cons, recent developments in research, and the experiences of other parents should be made available to enable parents to make an informed decision. What this paper adds Parents perceived different needs and concerns about nusinersen treatment, which emphasized individual differences. Parents' perspectives varied from battling the disease to preserving quality of life. Life expectancy, stopping deterioration, and improving quality of life were the perceived benefits of nusinersen treatment. Open communication about the pros and cons of treatment with clinicians facilitated decision-making. Clear and honest information facilitated the alignment of values and goals.
Project description:BackgroundExpanded access programs (EAPs) allow patients with serious, life-threatening conditions access to drugs prior to their formal approval. Despite the possible benefits for patients, EAPs present several challenges, including uncertainty regarding a drug's efficacy and safety as well as inequities regarding access to treatment. Although the number of EAPs is growing, the experience of patients participating in EAPs has not yet been studied. In Germany, an EAP for the treatment of Spinal Muscular Atrophy (SMA) with nusinersen ran from December 2016 to May 2017). SMA is a rare, progressive neuromuscular disorder characterized by muscle atrophy and proximal muscle weakness. Insights into patients' and caregivers' experiences could help to improve future EAPs.ResultsWe conducted a prospective study using semi-structured interviews with caregivers of children with Spinal Muscular Atrophy (SMA) Type 1who participated in the nusinersen EAP in Germany. Interviews were transcribed verbatim and analyzed using an inductive approach according to the principles of content analysis. Eight families participated in the study. Their children were between 2 and 28 months old. Six children received non-invasive ventilation. Participation in the EAP marked an important turning point in the caregivers' experiences. Their perspective changed from a severely limited life expectancy and a palliative approach to a more optimistic view including hopes for a longer life and positive development of their children. However, participating in the EAP was also challenging for caregivers in several ways. Lack of information regarding the launch of the program and the enrollment procedures caused significant uncertainty and stress among caregivers prior to the actual treatment. Further, concerns persisted that nusinersen could not be approved or that the child could be excluded due to an insufficient treatment response. Good communication and trusting relationships with medical and non-medical staff at the hospital helped caregivers cope with the uncertainties associated with the treatment.ConclusionFrom the caregivers' perspective, there was no alternative to participating in the EAP for nusinersen. All participants were positive regarding their decision to participate. However, this study suggests that developing procedures to increase speed and transparency and to ensure fairness could help to further improve the system of EAPs as a way to provide urgently needed care to highly vulnerable patients.
Project description:BackgroundAutosomal-recessive proximal spinal muscular atrophies (SMA) are disorders characterized by a ubiquitous deficiency of the survival of motor neuron protein that leads to a multisystemic disorder, which mostly affects alpha motor neurons. Disease progression is clinically associated with failure to thrive or weight loss, mainly caused by chewing and swallowing difficulties. Although pancreatic involvement has been described in animal models, systematic endocrinological evaluation of the energy metabolism in humans is lacking.MethodsIn 43 patients with SMA type I-III (8 type I; 22 type II; 13 type III), aged 0.6-21.8 years, auxological parameters, pubertal stage, motor function (Motor Function Measurement 32 -MFM32) as well as levels of leptin, insulin glucose, hemoglobin A1c, Homeostasis Model Assessment index and an urinary steroid profile were determined.ResultsHyperleptinemia was found in 15/35 (43%) of our patients; 9/15 (60%) of the hyperleptinemic patients were underweight, whereas 1/15 (7%) was obese. Hyperleptinemia was associated with SMA type (p = 0.018). There was a significant association with decreased motor function (MFM32 total score in hyperleptinemia 28.5%, in normoleptinemia 54.7% p = 0.008, OR 0.969; 95%-CI: 0.946-0.992). In addition, a higher occurrence of hirsutism, premature pubarche and a higher variability of the urinary steroid pattern were found.ConclusionHyperleptinemia is highly prevalent in underweight children with SMA and is associated with disease severity and decreased motor function. Neuronal degradation of hypothalamic cells or an increase in fat content by muscle remodeling could be the cause of hyperleptinemia.