ArticleAmerican journal of human genetics2002
Quantitative analyses of SMN1 and SMN2 based on real-time lightCycler PCR: fast and highly reliable carrier testing and prediction of severity of spinal muscular atrophy.
Article in American journal of human genetics, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 3 registered trials, which are not on this map. Cited by 449 papers, 7 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Multi-center Phase II Trial of Valproic Acid and Carnitine in Patients With Spinal Muscular Atrophy (SMA CARNI-VAL Trial)
In Vivo Study of Safety, Tolerability and Dosing Effect on SMN mRNA and Protein Levels of Valproic Acid in Patients With Spinal Muscular Atrophy
Phase I/II Trial of Valproic Acid and Carnitine in Infants With Spinal Muscular Atrophy Type I (CARNI-VAL Type I)
Who cites it
449 citing papers in PubMed, 7 syntheses or guidelines pooled it, 1,003 citations in OpenAlex.
- Systematic Literature Review to Assess Economic Evaluations in Spinal Muscular Atrophy (SMA).PharmacoEconomics · 2022Pooled it
- Systematic Literature Review to Assess the Cost and Resource Use Associated with Spinal Muscular Atrophy Management.PharmacoEconomics · 2022Pooled it
- Systematic Literature Review to Identify Utility Values in Patients with Spinal Muscular Atrophy (SMA) and Their Caregivers.PharmacoEconomics · 2022Pooled it
- Nusinersen in Adults with 5q Spinal Muscular Atrophy: a Systematic Review and Meta-analysis.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2022Pooled it
- Prognostic Factors and Treatment-Effect Modifiers in Spinal Muscular Atrophy.Clinical pharmacology and therapeutics · 2021Pooled it
- Drug treatment for spinal muscular atrophy types II and III.The Cochrane database of systematic reviews · 2020Pooled it
- Drug treatment for spinal muscular atrophy type I.The Cochrane database of systematic reviews · 2019Pooled it
- Safety and efficacy of nusinersen in spinal muscular atrophy: The EMBRACE study.Muscle & nerve · 2021Trial
- Nusinersen initiated in infants during the presymptomatic stage of spinal muscular atrophy: Interim efficacy and safety results from the Phase 2 NURTURE study.Neuromuscular disorders : NMD · 2019Trial
- Clinical Practice of Single-Molecule Real-Time Sequencing in the Diagnosis of Spinal Muscular Atrophy.Molecular genetics & genomic medicine · 2026Article
- Consensus for the Diagnosis and Treatment of Patients With Spinal Muscular Atrophy (SMA) in Latin America.Revista de neurologia · 2026Article
- Survival Motor Neuron Protein Requirement-Supply Mismatch in Spinal Muscular Atrophy: A Conceptual Framework.Advances in therapy · 2026Review
- Clinical Characterization of Patients With 5q Spinal Muscular Atrophy Types 2 and 3 in Brazil: A Cross-Sectional Observational Study.Clinical genetics · 2026Observational
- New SMA era: A broad-range tiered assessment of function for the evolving SMA phenotype (EVOLVE-SMA).Journal of neuromuscular diseases · 2026Article
- Phenotypic intrafamilial variability of 5q-associated spinal muscular atrophy: A systematic multicentre sibling study.Journal of neuromuscular diseases · 2026Article
- Longitudinal Transcriptomic Analysis Reveals Systemic Effects of Risdiplam in Adults with Spinal Muscular Atrophy.Brain sciences · 2026Article
- Lung Function and Respiratory Muscle Strength in Symptomatic Children and Adults With Spinal Muscular Atrophy Treated With Nusinersen.Neurology · 2026Observational
- Characterizing SMN1 hybrid and deletion alleles using large-scale SNP array-based SMA carrier screening.BMC medical genomics · 2026Article
- CT-guided Lumbar Puncture for Intrathecal Nusinersen Injection in Patients with Spinal Muscular Atrophy: Technical Effectiveness, Safety, and Radiation Dose.Clinical neuroradiology · 2026Article
- Exploring the phenotypic and genotypic spectrum of spinal muscular atrophy in Bangladeshi children.BMC neurology · 2026Article
389 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Spinal muscular atrophy (SMA) is a common autosomal recessive disorder in humans, caused by homozygous absence of the survival motor neuron gene 1 (SMN1). SMN2, a copy gene, influences the severity of SMA and may be used in somatic gene therapy of patients with SMA in the future. We present a new, fast, and highly reliable quantitative test, based on real-time LightCycler PCR that amplifies either SMN1 or SMN2. The SMN1 copies were determined and validated in 329 carriers and controls. The specificity of the test is 100%, whereas the sensitivity is 96.2%. The quantitative analysis of SMN2 copies in 375 patients with type I, type II, or type III SMA showed a significant correlation between SMN2 copy number and type of SMA as well as duration of survival. Thus, 80% of patients with type I SMA carry one or two SMN2 copies, and 82% of patients with type II SMA carry three SMN2 copies, whereas 96% of patients with type III SMA carry three or four SMN2 copies. Among 113 patients with type I SMA, 9 with one SMN2 copy lived <11 mo, 88/94 with two SMN2 copies lived <21 mo, and 8/10 with three SMN2 copies lived 33-66 mo. On the basis of SMN2 copy number, we calculated the posterior probability that a child with homozygous absence of SMN1 will develop type I, type II, or type III SMA.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.