SLC13A5 Deficiency Natural History Study - United States Only

NCT ID: NCT06144957

Last Updated: 2025-08-05

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ENROLLING_BY_INVITATION

Total Enrollment

17 participants

Study Classification

OBSERVATIONAL

Study Start Date

2021-12-01

Study Completion Date

2025-09-30

Brief Summary

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SLC13A5 deficiency (Citrate Transporter Disorder, EIEE 25) is a rare genetic disorder with neurodevelopmental delays and seizure onset in the first few days of life. This natural history study is designed to address the lack of understanding of disease progression. Additionally it will identify clinical and biomarker endpoints for use in future clinical trials.

Detailed Description

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This is a longitudinal observational study of the natural history of SLC13A5 deficiency for up to 2 years. This study does not involve any therapeutic intervention. The study includes in-person clinical assessments and laboratory analyses including standardized clinical evaluations, neurocognitive and quality of life scales, video movement rating scale, laboratory measurements of blood and urine, EEG capturing wake and sleep, EKG. Additionally, remote assessments in 1st year (every 3 months) and 2nd year (every 4 months) of enrollment will be made and caregiver will be asked to keep a seizure diary for the duration of the study. Personnel having expertise to comprehensively evaluate biological pathways that are perturbed by SLC13A5 deficiency will analyze the collected data. Improved understanding of disease pathogenesis will guide therapeutics and reveal clinical and biomarker endpoints for use in future clinical trials.

Conditions

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Citrate Transporter Deficiency Epilepsy Rare Diseases Movement Disorders Genetic Disorder SLC13A5 Deficiency EIEE25 Kohlschutter-Tonz Syndrome (Non-ROGDI) Citrate Transporter Disorder DEE25

Study Design

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Observational Model Type

CASE_ONLY

Study Time Perspective

PROSPECTIVE

Eligibility Criteria

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Inclusion Criteria

1. Parent(s)/legal representative and/or patient must be willing and able to give informed consent/assent for participation in the study.
2. Males and females of any age are eligible for this study
3. Suspected or confirmed diagnosis of SLC135 deficiency with genetic variants in both SLC13A5 alleles and consistent clinical characteristics. Variants of uncertain significance in one or both alleles are acceptable if deemed good candidates by participant's primary geneticist or neurologist and study personnel.
4. Participant and caregiver must be willing to provide clinical data, participate in standardized assessments, and provide biological samples.
5. Willingness to travel to one of the three sites annually is favored, but not required.

Exclusion Criteria

1\. The presence of a second, confirmed disorder, genetic or otherwise, affecting neurodevelopment or with other overlapping symptoms of SLC13A5 deficiency.

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Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Stanford University

OTHER

Sponsor Role collaborator

Brown University

OTHER

Sponsor Role collaborator

University of Texas Southwestern Medical Center

OTHER

Sponsor Role collaborator

TESS Research Foundation

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Brenda E Porter, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Stanford University

Kimberly Goodspeed, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Texas Southwestern Dallas

Judy Liu, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Brown University

Locations

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Lucille Packard Children's Hospital, Stanford University

Palo Alto, California, United States

Site Status

Brown University

Providence, Rhode Island, United States

Site Status

University of Texas Southwestern Dallas

Dallas, Texas, United States

Site Status

Countries

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United States

References

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Thevenon J, Milh M, Feillet F, St-Onge J, Duffourd Y, Juge C, Roubertie A, Heron D, Mignot C, Raffo E, Isidor B, Wahlen S, Sanlaville D, Villeneuve N, Darmency-Stamboul V, Toutain A, Lefebvre M, Chouchane M, Huet F, Lafon A, de Saint Martin A, Lesca G, El Chehadeh S, Thauvin-Robinet C, Masurel-Paulet A, Odent S, Villard L, Philippe C, Faivre L, Riviere JB. Mutations in SLC13A5 cause autosomal-recessive epileptic encephalopathy with seizure onset in the first days of life. Am J Hum Genet. 2014 Jul 3;95(1):113-20. doi: 10.1016/j.ajhg.2014.06.006.

Reference Type BACKGROUND
PMID: 24995870 (View on PubMed)

Hardies K, de Kovel CG, Weckhuysen S, Asselbergh B, Geuens T, Deconinck T, Azmi A, May P, Brilstra E, Becker F, Barisic N, Craiu D, Braun KP, Lal D, Thiele H, Schubert J, Weber Y, van 't Slot R, Nurnberg P, Balling R, Timmerman V, Lerche H, Maudsley S, Helbig I, Suls A, Koeleman BP, De Jonghe P; autosomal recessive working group of the EuroEPINOMICS RES Consortium. Recessive mutations in SLC13A5 result in a loss of citrate transport and cause neonatal epilepsy, developmental delay and teeth hypoplasia. Brain. 2015 Nov;138(Pt 11):3238-50. doi: 10.1093/brain/awv263. Epub 2015 Sep 17.

Reference Type BACKGROUND
PMID: 26384929 (View on PubMed)

Klotz J, Porter BE, Colas C, Schlessinger A, Pajor AM. Mutations in the Na(+)/citrate cotransporter NaCT (SLC13A5) in pediatric patients with epilepsy and developmental delay. Mol Med. 2016 May 26;22:310-21. doi: 10.2119/molmed.2016.00077.

Reference Type BACKGROUND
PMID: 27261973 (View on PubMed)

Selch S, Chafai A, Sticht H, Birkenfeld AL, Fromm MF, Konig J. Analysis of naturally occurring mutations in the human uptake transporter NaCT important for bone and brain development and energy metabolism. Sci Rep. 2018 Jul 27;8(1):11330. doi: 10.1038/s41598-018-29547-8.

Reference Type BACKGROUND
PMID: 30054523 (View on PubMed)

Bainbridge MN, Cooney E, Miller M, Kennedy AD, Wulff JE, Donti T, Jhangiani SN, Gibbs RA, Elsea SH, Porter BE, Graham BH. Analyses of SLC13A5-epilepsy patients reveal perturbations of TCA cycle. Mol Genet Metab. 2017 Aug;121(4):314-319. doi: 10.1016/j.ymgme.2017.06.009. Epub 2017 Jun 24.

Reference Type BACKGROUND
PMID: 28673551 (View on PubMed)

Weeke LC, Brilstra E, Braun KP, Zonneveld-Huijssoon E, Salomons GS, Koeleman BP, van Gassen KL, van Straaten HL, Craiu D, de Vries LS. Punctate white matter lesions in full-term infants with neonatal seizures associated with SLC13A5 mutations. Eur J Paediatr Neurol. 2017 Mar;21(2):396-403. doi: 10.1016/j.ejpn.2016.11.002. Epub 2016 Nov 19.

Reference Type BACKGROUND
PMID: 27913086 (View on PubMed)

Irizarry AR, Yan G, Zeng Q, Lucchesi J, Hamang MJ, Ma YL, Rong JX. Defective enamel and bone development in sodium-dependent citrate transporter (NaCT) Slc13a5 deficient mice. PLoS One. 2017 Apr 13;12(4):e0175465. doi: 10.1371/journal.pone.0175465. eCollection 2017.

Reference Type BACKGROUND
PMID: 28406943 (View on PubMed)

Schossig A, Bloch-Zupan A, Lussi A, Wolf NI, Raskin S, Cohen M, Giuliano F, Jurgens J, Krabichler B, Koolen DA, de Macena Sobreira NL, Maurer E, Muller-Bolla M, Penzien J, Zschocke J, Kapferer-Seebacher I. SLC13A5 is the second gene associated with Kohlschutter-Tonz syndrome. J Med Genet. 2017 Jan;54(1):54-62. doi: 10.1136/jmedgenet-2016-103988. Epub 2016 Sep 6.

Reference Type BACKGROUND
PMID: 27600704 (View on PubMed)

Other Identifiers

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SLC13A5USNHS

Identifier Type: -

Identifier Source: org_study_id

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