Evidence map›Paper›PMID 41674648›Full record

ArticlemedRxiv : the preprint server for health sciences2026

Copy Number Variant analysis by exome sequencing is an effective approach to optimize diagnostic yield for developmental disorders - the DDD-Africa study.

Nadja Louw, Prince Makay, Phelelani T Mpangase, Thirona Naicker, Laura M Yates, Engela Honey, Gerrye Mbungu, Kris Van Den Bogaert, Helen V Firth, Matthew E Hurles and 6 more

Abstract readPreprint
In one paragraph

Article in medRxiv : the preprint server for health sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from 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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

16 authors.

Nadja LouwDivision of Human Genetics, National Health Laboratory Service and School of Pathology, Faculty of Health Sciences, The University of the Witwatersrand, Johannesburg, South Africa.ORCID 0009-0007-3716-8172
Prince MakayCenter for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.ORCID 0000-0002-2910-9590
Phelelani T MpangaseSydney Brenner Institute for Molecular Bioscience, Faculty of Health Sciences, University of the Witwatersrand. Johannesburg, South Africa.ORCID 0000-0001-8280-8940
Thirona NaickerDepartment of Paediatrics, Medical Genetics, School of Clinical Medicine, University of KwaZulu-Natal, Durban, South Africa.ORCID 0000-0001-7146-7159
Laura M YatesKwazulu-Natal Research Innovation and Sequencing Platform (KRISP), University of KwaZulu-Natal, Durban, South Africa.
Engela HoneyDepartment of Biochemistry, Genetics and Microbiology, Faculty of Natural and Agricultural Science, University of Pretoria, Pretoria, South Africa.ORCID 0000-0002-4587-2844
Gerrye MbunguCenter for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.
Kris Van Den BogaertCenter for Human Genetics, University Hospitals, University of Leuven, Leuven, Belgium.ORCID 0000-0003-4525-5907
Helen V FirthWellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom.ORCID 0000-0002-6410-0882
Matthew E HurlesWellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom.ORCID 0000-0002-2333-7015
Prosper Lukusa TshiloboCenter for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.ORCID 0000-0002-5414-2915
Koen DevriendtCenter for Human Genetics, University Hospitals, University of Leuven, Leuven, Belgium.
Amanda KrauseDivision of Human Genetics, National Health Laboratory Service and School of Pathology, Faculty of Health Sciences, The University of the Witwatersrand, Johannesburg, South Africa.ORCID 0000-0002-7157-0807
Nadia CarstensDivision of Human Genetics, National Health Laboratory Service and School of Pathology, Faculty of Health Sciences, The University of the Witwatersrand, Johannesburg, South Africa.ORCID 0000-0003-4754-7030
Aimé LumakaCenter for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.ORCID 0000-0002-5468-8678
Zané LombardDivision of Human Genetics, National Health Laboratory Service and School of Pathology, Faculty of Health Sciences, The University of the Witwatersrand, Johannesburg, South Africa.ORCID 0000-0002-7997-2616

Funding

Deciphering Developmental Disorders in Africa (DDD-Africa) - Evaluating Clinical Exome Sequencing in an African SettingU01MH115483 · NIMH · WITS HEALTH CONSORTIUM (PTY), LTD · PI LOMBARD, ZANE · 2017 to 2021
$1.3M
Advancing discovery for developmental disorders - expanded analysis of the DDD-Africa resourceU01HD114537 · NICHD · WITS HEALTH CONSORTIUM (PTY), LTD · PI LOMBARD, ZANE · 2023 to 2025
$747k
NICHD NIH HHS U01 HD114537NIMH NIH HHS U01 MH115483
6 · The paper itself

Abstract

Copy number variants (CNV) contribute significantly to the pathogenic variation associated with developmental disorders. CNV detection is often not included in standard exome sequencing (ES) analysis. Complementary methods such as chromosomal microarray are typically offered in diagnostic laboratories to diagnose pathogenic CNV. In this study, we aimed to develop an optimal approach for incorporating CNV detection within our ES analysis process for the Deciphering Developmental Disorders in Africa (DDD-Africa) cohort. We analyzed ES data from 505 probands with a developmental disorder, applying a CNV detection approach that assessed data generated using the tools CANOES and XHMM. When available, parental ES data was used to assess inheritance patterns. We confirmed a diagnosis in 42/505 (8,3%) patients with 44 pathogenic CNV identified in the probands. There were 31 deletions and 13 duplications. Among the 27 probands with parental data, all identified CNV were

Indexed as

Africacopy number variationExome sequencinggenomic medicinelow- and middle-income countries

Identifiers

PMID41674648
PMCPMC12889869

What Socratic holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

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 Socratic graph.