Congenital CataractNCT05782452
Genetic Diagnosis in Congenital Cataracts
An observational study of Congenital Cataract, run by Zhongshan Ophthalmic Center, Sun Yat-sen University at 1 site in China.
Trial summary
The prediction of genetic risk in congenital cataract patients has great clinical significance. In this trial, the investigators aim to screen the causative variants from 115 unrelated bilateral congenital cataract patients enrolled consecutively, describe novel and recurrent variants, analyze the factors affecting… Read more about this study
- Who is it for?
- Ages 0 to 18 years
- Conditions the study is for
- Congenital Cataract
- What is being tested?
- Ophthalmic examination and Whole-exome sequencing
- Type of treatment
- Surgery or procedure
- How many people
- 115 participants
- Where
- 1 siteChina
- Study dates
- 1 Jan 2021to 31 Dec 2022
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 0 to 18 years
- All sexes
- Child, Adult
Study population: This prospective study was a part of an ongoing series at the Childhood Cataract Program of the Chinese Ministry of Health (CCPMOH), China. The cohort consisted of 115 bilateral congenital cataract probands who were consecutively enrolled.
Who may be able to join
- The participant with bilateral congenital cataract;
- Have signed a consent form. .
Who cannot join
- 1. The participant not identified with congenital cataract; 2. The participant with unilateral congenital cataract.
- -
Trial locations and contacts
1 site in 1 country.
China1 site
Zhongshan Ophthalmic Center, Sun Yat-sen University
Guangzhou, Guangdong, 510080
About this study
Official title: Genetic Diagnosis and Phenotype-genotype Correlation in a Large Chinese Cohort of Congenital Cataracts
The prediction of genetic risk in congenital cataract patients has great clinical significance. In this trial, the investigators aim to screen the causative variants from 115 unrelated bilateral congenital cataract patients enrolled consecutively, describe novel and recurrent variants, analyze the factors affecting genetic diagnostic yield, and explore potential phenotype-genotype correlation.
Read the detailed description
Determining whether the disease is hereditary and the precise genetic cause of congenital cataract has great clinical significance in guiding genetic counseling and improving clinical care pathway. Varying among studies, genetic causes account for 8.3-85% of congenital cataracts because of the difference in ethnic background, genetic screening techniques used, the percentage of patients with bilateral cataracts, with a family history, and with syndromic disease.
A phenotype-genotype correlation may be used to predict the causative genes, and the involvement of other tissues and organs based on the appearance of the lens. In addition, it can be used to improve our understanding of lens biology. A phenotype-genotype correlation is difficult to establish because of the genotypic and phenotypic heterogeneity of congenital cataracts.
In this trail, the investigators aim to screen the causative variants from 115 unrelated bilateral congenital cataract patients enrolled consecutively, describe novel and recurrent variants, analyze the factors affecting genetic diagnostic yield, and explore potential phenotype-genotype correlation. Facial and anterior eye segment photographs, pre- and post-operative ocular parameters, and medical and family histories were recorded. Bioinformatics analysis was performed using whole-exome sequencing data. Statistical and correlation analyses were performed using the basic characteristics, deep phenotype, and genotype data.
- Conditions
- Congenital Cataract
- Being tested
- Ophthalmic examination, Whole-exome sequencing
- Keywords
- Congenital cataract, Genetic diagnosis, Phenotype-genotype correlation
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Ophthalmic examinationProcedure or surgery
Facial photographs of the participants were obtained at the time of enrolment. Pre- and post-operative anterior eye segment photographs were obtained under diffuse, direct focal and retro illumination. Clinical data, including basic information, family history, and comprehensive pre- and post-operative ophthalmic examination findings, were recorded.
Whole-exome sequencingGenetic
Performing whole-exome sequencing and bioinformatics analysis.
| Study group | Role | What they receive |
|---|---|---|
| Bilateral congenital cataract probands who were consecutively enrolled | Not described Receives: Procedure: Ophthalmic examination; Genetic: Whole-exome sequencing |
What is being measured
The primary outcome is the main question the study is designed to answer.
Whether the participant has pathogenic genes
Measured: 2 years
Type of the cataracts
The cataracts were categorized into 17 groups (Membranous cataract, Thin and fibrotic nuclear cataract, Nuclear cataract, Zonular cataract, Pulverulent cataract, Pocket-like cataract, "Ant egg" cataract, Cerulean cataract, Coronary cataract, Coralliform cataract, Cortical cataract, Sutural cataract, Anterior subcapsular cataract, Anterior polar cataract, Posterior subcapsular cataract, Posterior polar cataract, Total cataract)
Measured: before surgery
Secondary outcomes (2)
Whether the participant has family history
Measured: 2 years
The symmetricity of the type of cataract
Measured: before surgery
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted23 Mar 2023
- Study start1 Jan 2021
- Primary completion31 Dec 2022
- Study completion31 Dec 2022
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (12)Papers the sponsor has linked to this study.
- Other trials for Congenital CataractStudies of the same condition, open and under way.
- More trials run by Zhongshan Ophthalmic Center, Sun Yat-sen UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case only
- Time perspective
- Prospective
- Enrolment
- 115 participants (actual)
Sponsor and investigators
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Weirong Chen, Zhongshan Ophthalmic Center, Sun Yat-sen University
- Investigators
- Weirong Chen, PhD, Principal investigator, Zhongshan Ophthalmic Center, Sun Yat-sen University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05782452
- Sponsor's protocol ID
- 2020KYPJ004
- Status last verified
- Mar 2023
- First submitted
- 12 Mar 2023
- Last updated
- 23 Mar 2023
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Publications
Shiels A, Hejtmancik JF. Biology of Inherited Cataracts and Opportunities for Treatment. Annu Rev Vis Sci. 2019 Sep 15;5:123-149. doi: 10.1146/annurev-vision-091517-034346.
PubMed 31525139Haargaard B, Wohlfahrt J, Fledelius HC, Rosenberg T, Melbye M. Incidence and cumulative risk of childhood cataract in a cohort of 2.6 million Danish children. Invest Ophthalmol Vis Sci. 2004 May;45(5):1316-20. doi: 10.1167/iovs.03-0635.
PubMed 15111583Gillespie RL, O'Sullivan J, Ashworth J, Bhaskar S, Williams S, Biswas S, Kehdi E, Ramsden SC, Clayton-Smith J, Black GC, Lloyd IC. Personalized diagnosis and management of congenital cataract by next-generation sequencing. Ophthalmology. 2014 Nov;121(11):2124-37.e1-2. doi: 10.1016/j.ophtha.2014.06.006. Epub 2014 Aug 19.
PubMed 25148791Feinmann J. The BMJ Christmas appeal 2016-17: changing children's lives through cataract surgery. BMJ. 2016 Dec 15;355:i6650. doi: 10.1136/bmj.i6650. No abstract available.
PubMed 27979852Scott MH, Hejtmancik JF, Wozencraft LA, Reuter LM, Parks MM, Kaiser-Kupfer MI. Autosomal dominant congenital cataract. Interocular phenotypic variability. Ophthalmology. 1994 May;101(5):866-71. doi: 10.1016/s0161-6420(94)31246-2.
PubMed 8190472Aldahmesh MA, Khan AO, Mohamed JY, Hijazi H, Al-Owain M, Alswaid A, Alkuraya FS. Genomic analysis of pediatric cataract in Saudi Arabia reveals novel candidate disease genes. Genet Med. 2012 Dec;14(12):955-62. doi: 10.1038/gim.2012.86. Epub 2012 Aug 30.
PubMed 22935719Ng D, Thakker N, Corcoran CM, Donnai D, Perveen R, Schneider A, Hadley DW, Tifft C, Zhang L, Wilkie AO, van der Smagt JJ, Gorlin RJ, Burgess SM, Bardwell VJ, Black GC, Biesecker LG. Oculofaciocardiodental and Lenz microphthalmia syndromes result from distinct classes of mutations in BCOR. Nat Genet. 2004 Apr;36(4):411-6. doi: 10.1038/ng1321. Epub 2004 Mar 7.
PubMed 15004558Chen J, Ma Z, Jiao X, Fariss R, Kantorow WL, Kantorow M, Pras E, Frydman M, Pras E, Riazuddin S, Riazuddin SA, Hejtmancik JF. Mutations in FYCO1 cause autosomal-recessive congenital cataracts. Am J Hum Genet. 2011 Jun 10;88(6):827-838. doi: 10.1016/j.ajhg.2011.05.008.
PubMed 21636066Musleh M, Hall G, Lloyd IC, Gillespie RL, Waller S, Douzgou S, Clayton-Smith J, Kehdi E, Black GC, Ashworth J. Diagnosing the cause of bilateral paediatric cataracts: comparison of standard testing with a next-generation sequencing approach. Eye (Lond). 2016 Sep;30(9):1175-81. doi: 10.1038/eye.2016.105. Epub 2016 Jun 17.
PubMed 27315345Rechsteiner D, Issler L, Koller S, Lang E, Bahr L, Feil S, Ruegger CM, Kottke R, Toelle SP, Zweifel N, Steindl K, Joset P, Zweier M, Suter AA, Gogoll L, Haas C, Berger W, Gerth-Kahlert C. Genetic Analysis in a Swiss Cohort of Bilateral Congenital Cataract. JAMA Ophthalmol. 2021 Jul 1;139(7):691-700. doi: 10.1001/jamaophthalmol.2021.0385.
PubMed 34014271Kandaswamy DK, Prakash MVS, Graw J, Koller S, Magyar I, Tiwari A, Berger W, Santhiya ST. Application of WES Towards Molecular Investigation of Congenital Cataracts: Identification of Novel Alleles and Genes in a Hospital-Based Cohort of South India. Int J Mol Sci. 2020 Dec 16;21(24):9569. doi: 10.3390/ijms21249569.
PubMed 33339270Wang Q, Lin X, Wang D, Qin T, Chen W, Chen J, Zhang X, Lin Y, Lin Z, Li J, Li X, Hejtmancik JF, Chen W. Phenotype-genotype correlation of patients with congenital cataracts and hair anomalies. Mol Vis. 2025 Sep 8;31:221-229. eCollection 2025.
PubMed 41306484
Study at a glance
From the registry record, last updated by the sponsor on 23 Mar 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Genetic Diagnosis and Phenotype-genotype Correlation in a Large Chinese Cohort of Congenital Cataracts
- ClinicalTrials.gov ID
- NCT05782452
- Acronym / sponsor ID
- 2020KYPJ004
- Conditions
- Congenital Cataract
- Keywords
- Congenital cataract, Genetic diagnosis, Phenotype-genotype correlation
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 115 participants (actual)
- Lead sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen UniversityUniversity, hospital or other
- Study start
- 1 Jan 2021 (actual)
- Primary completion
- 31 Dec 2022 (actual)
- Study completion
- 31 Dec 2022 (actual)
- First posted
- 23 Mar 2023 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The prediction of genetic risk in congenital cataract patients has great clinical significance. In this trial, the investigators aim to screen the causative variants from 115 unrelated bilateral congenital cataract patients enrolled consecutively, describe novel and recurrent variants, analyze the factors affecting genetic diagnostic yield, and explore potential phenotype-genotype correlation.
Detailed description
Determining whether the disease is hereditary and the precise genetic cause of congenital cataract has great clinical significance in guiding genetic counseling and improving clinical care pathway. Varying among studies, genetic causes account for 8.3-85% of congenital cataracts because of the difference in ethnic background, genetic screening techniques used, the percentage of patients with bilateral cataracts, with a family history, and with syndromic disease.
A phenotype-genotype correlation may be used to predict the causative genes, and the involvement of other tissues and organs based on the appearance of the lens. In addition, it can be used to improve our understanding of lens biology. A phenotype-genotype correlation is difficult to establish because of the genotypic and phenotypic heterogeneity of congenital cataracts.
In this trail, the investigators aim to screen the causative variants from 115 unrelated bilateral congenital cataract patients enrolled consecutively, describe novel and recurrent variants, analyze the factors affecting genetic diagnostic yield, and explore potential phenotype-genotype correlation. Facial and anterior eye segment photographs, pre- and post-operative ocular parameters, and medical and family histories were recorded. Bioinformatics analysis was performed using whole-exome sequencing data. Statistical and correlation analyses were performed using the basic characteristics, deep phenotype, and genotype data.
Study design
- Observational model
- Case only
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Bilateral congenital cataract probands who were consecutively enrolled | – | Procedure: Ophthalmic examination, Genetic: Whole-exome sequencing |
Who may qualify
- Ages
- 0 to 18 years
- Sex
- All
- Age groups
- Child, Adult
- Study population
- This prospective study was a part of an ongoing series at the Childhood Cataract Program of the Chinese Ministry of Health (CCPMOH), China. The cohort consisted of 115 bilateral congenital cataract probands who were consecutively enrolled.
Key inclusion criteria (2 listed)
- The participant with bilateral congenital cataract;
- Have signed a consent form. .
Key exclusion criteria (2 listed)
- 1. The participant not identified with congenital cataract; 2. The participant with unilateral congenital cataract.
- -
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Ophthalmic examinationFacial photographs of the participants were obtained at the time of enrolment. Pre- and post-operative anterior eye segment photographs were obtained under diffuse, direct focal and retro illumination. Clinical data, including basic information, family history, and comprehensive pre- and post-operative ophthalmic examination findings, were recorded. | Procedure or surgery | Bilateral congenital cataract probands who were consecutively enrolled |
| Whole-exome sequencingPerforming whole-exome sequencing and bioinformatics analysis. | Genetic | Bilateral congenital cataract probands who were consecutively enrolled |
Primary outcome
Whether the participant has pathogenic genes
Time frame: 2 years
Type of the cataracts
Time frame: before surgery
The cataracts were categorized into 17 groups (Membranous cataract, Thin and fibrotic nuclear cataract, Nuclear cataract, Zonular cataract, Pulverulent cataract, Pocket-like cataract, "Ant egg" cataract, Cerulean cataract, Coronary cataract, Coralliform cataract, Cortical cataract, Sutural cataract, Anterior subcapsular cataract, Anterior polar cataract, Posterior subcapsular cataract, Posterior polar cataract, Total cataract)
2 secondary outcomes
Whether the participant has family history
Time frame: 2 years
The symmetricity of the type of cataract
Time frame: before surgery
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 23 Mar 2023.
- Results publication: PubMed 31525139Shiels A, Hejtmancik JF. Biology of Inherited Cataracts and Opportunities for Treatment. Annu Rev Vis Sci. 2019 Sep 15;5:123-149. doi: 10.1146/annurev-vision-091517-034346.
- Results publication: PubMed 15111583Haargaard B, Wohlfahrt J, Fledelius HC, Rosenberg T, Melbye M. Incidence and cumulative risk of childhood cataract in a cohort of 2.6 million Danish children. Invest Ophthalmol Vis Sci. 2004 May;45(5):1316-20. doi: 10.1167/iovs.03-0635.
- Results publication: PubMed 25148791Gillespie RL, O'Sullivan J, Ashworth J, Bhaskar S, Williams S, Biswas S, Kehdi E, Ramsden SC, Clayton-Smith J, Black GC, Lloyd IC. Personalized diagnosis and management of congenital cataract by next-generation sequencing. Ophthalmology. 2014 Nov;121(11):2124-37.e1-2. doi: 10.1016/j.ophtha.2014.06.006. Epub 2014 Aug 19.
- Results publication: PubMed 27979852Feinmann J. The BMJ Christmas appeal 2016-17: changing children's lives through cataract surgery. BMJ. 2016 Dec 15;355:i6650. doi: 10.1136/bmj.i6650. No abstract available.
- Results publication: PubMed 8190472Scott MH, Hejtmancik JF, Wozencraft LA, Reuter LM, Parks MM, Kaiser-Kupfer MI. Autosomal dominant congenital cataract. Interocular phenotypic variability. Ophthalmology. 1994 May;101(5):866-71. doi: 10.1016/s0161-6420(94)31246-2.
- Results publication: PubMed 22935719Aldahmesh MA, Khan AO, Mohamed JY, Hijazi H, Al-Owain M, Alswaid A, Alkuraya FS. Genomic analysis of pediatric cataract in Saudi Arabia reveals novel candidate disease genes. Genet Med. 2012 Dec;14(12):955-62. doi: 10.1038/gim.2012.86. Epub 2012 Aug 30.
- Results publication: PubMed 15004558Ng D, Thakker N, Corcoran CM, Donnai D, Perveen R, Schneider A, Hadley DW, Tifft C, Zhang L, Wilkie AO, van der Smagt JJ, Gorlin RJ, Burgess SM, Bardwell VJ, Black GC, Biesecker LG. Oculofaciocardiodental and Lenz microphthalmia syndromes result from distinct classes of mutations in BCOR. Nat Genet. 2004 Apr;36(4):411-6. doi: 10.1038/ng1321. Epub 2004 Mar 7.
- Results publication: PubMed 21636066Chen J, Ma Z, Jiao X, Fariss R, Kantorow WL, Kantorow M, Pras E, Frydman M, Pras E, Riazuddin S, Riazuddin SA, Hejtmancik JF. Mutations in FYCO1 cause autosomal-recessive congenital cataracts. Am J Hum Genet. 2011 Jun 10;88(6):827-838. doi: 10.1016/j.ajhg.2011.05.008.
- Results publication: PubMed 27315345Musleh M, Hall G, Lloyd IC, Gillespie RL, Waller S, Douzgou S, Clayton-Smith J, Kehdi E, Black GC, Ashworth J. Diagnosing the cause of bilateral paediatric cataracts: comparison of standard testing with a next-generation sequencing approach. Eye (Lond). 2016 Sep;30(9):1175-81. doi: 10.1038/eye.2016.105. Epub 2016 Jun 17.
- Results publication: PubMed 34014271Rechsteiner D, Issler L, Koller S, Lang E, Bahr L, Feil S, Ruegger CM, Kottke R, Toelle SP, Zweifel N, Steindl K, Joset P, Zweier M, Suter AA, Gogoll L, Haas C, Berger W, Gerth-Kahlert C. Genetic Analysis in a Swiss Cohort of Bilateral Congenital Cataract. JAMA Ophthalmol. 2021 Jul 1;139(7):691-700. doi: 10.1001/jamaophthalmol.2021.0385.
- Results publication: PubMed 33339270Kandaswamy DK, Prakash MVS, Graw J, Koller S, Magyar I, Tiwari A, Berger W, Santhiya ST. Application of WES Towards Molecular Investigation of Congenital Cataracts: Identification of Novel Alleles and Genes in a Hospital-Based Cohort of South India. Int J Mol Sci. 2020 Dec 16;21(24):9569. doi: 10.3390/ijms21249569.
- Derived from this study: PubMed 41306484Wang Q, Lin X, Wang D, Qin T, Chen W, Chen J, Zhang X, Lin Y, Lin Z, Li J, Li X, Hejtmancik JF, Chen W. Phenotype-genotype correlation of patients with congenital cataracts and hair anomalies. Mol Vis. 2025 Sep 8;31:221-229. eCollection 2025.
- Individual participant dataSharing planned: Undecided
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Weirong Chen, PhD principal investigator
Zhongshan Ophthalmic Center, Sun Yat-sen University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Congenital Cataract, run by Zhongshan Ophthalmic Center, Sun Yat-sen University at 1 site in China.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 23 Mar 2023. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Whether the participant has pathogenic genes (time frame: 2 years). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05782452, which also lists 12 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 23 Mar 2023.