U.S. flag

An official website of the United States government

Format

Send to:

Choose Destination

Intellectual disability, X-linked 23(XLID23)

MedGen UID:
163234
•Concept ID:
C0796229
•
Mental or Behavioral Dysfunction
Synonyms: MRX23; XLID23
 
Monarch Initiative: MONDO:0010230
OMIM®: 300046

Definition

Nonsyndromic mental retardation with speech disorders. [from MCA/MR]

Clinical features

From HPO
Intellectual disability
MedGen UID:
811461
•Concept ID:
C3714756
•
Mental or Behavioral Dysfunction
Intellectual disability, previously referred to as mental retardation, is characterized by subnormal intellectual functioning that occurs during the developmental period. It is defined by an IQ score below 70.
See: Feature record | Search on this feature

Professional guidelines

PubMed

Whole Exome Sequencing as a First-Line Molecular Genetic Test in Developmental and Epileptic Encephalopathies.
Vetri L, Calì F, Saccone S, Vinci M, Chiavetta NV, Carotenuto M, Roccella M, Costanza C, Elia M
Int J Mol Sci 2024 Jan 17;25(2) doi: 10.3390/ijms25021146. PMID: 38256219Free PMC Article
Phenotypic variability to medication management: an update on fragile X syndrome.
Elhawary NA, AlJahdali IA, Abumansour IS, Azher ZA, Falemban AH, Madani WM, Alosaimi W, Alghamdi G, Sindi IA
Hum Genomics 2023 Jul 7;17(1):60. doi: 10.1186/s40246-023-00507-2. PMID: 37420260Free PMC Article
Clinical delineation, sex differences, and genotype-phenotype correlation in pathogenic KDM6A variants causing X-linked Kabuki syndrome type 2.
Faundes V, Goh S, Akilapa R, Bezuidenhout H, Bjornsson HT, Bradley L, Brady AF, Brischoux-Boucher E, Brunner H, Bulk S, Canham N, Cody D, Dentici ML, Digilio MC, Elmslie F, Fry AE, Gill H, Hurst J, Johnson D, Julia S, Lachlan K, Lebel RR, Byler M, Gershon E, Lemire E, Gnazzo M, Lepri FR, Marchese A, McEntagart M, McGaughran J, Mizuno S, Okamoto N, Rieubland C, Rodgers J, Sasaki E, Scalais E, Scurr I, Suri M, van der Burgt I, Matsumoto N, Miyake N, Benoit V, Lederer D, Banka S
Genet Med 2021 Jul;23(7):1202-1210. Epub 2021 Mar 5 doi: 10.1038/s41436-021-01119-8. PMID: 33674768Free PMC Article

Recent clinical studies

Etiology

Lentiviral Gene Therapy for Cerebral Adrenoleukodystrophy.
Eichler F, Duncan CN, Musolino PL, Lund TC, Gupta AO, De Oliveira S, Thrasher AJ, Aubourg P, Kühl JS, Loes DJ, Amartino H, Smith N, Folloni Fernandes J, Sevin C, Sankar R, Hussain SA, Gissen P, Dalle JH, Platzbecker U, Downey GF, McNeil E, Demopoulos L, Dietz AC, Thakar HL, Orchard PJ, Williams DA
N Engl J Med 2024 Oct 10;391(14):1302-1312. doi: 10.1056/NEJMoa2400442. PMID: 39383459
Epigenetic regulation of autophagy-related genes: Implications for neurodevelopmental disorders.
Lewerissa EI, Nadif Kasri N, Linda K
Autophagy 2024 Jan;20(1):15-28. Epub 2023 Sep 6 doi: 10.1080/15548627.2023.2250217. PMID: 37674294Free PMC Article
Long-Term Efficacy of T3 Analogue Triac in Children and Adults With MCT8 Deficiency: A Real-Life Retrospective Cohort Study.
van Geest FS, Groeneweg S, van den Akker ELT, Bacos I, Barca D, van den Berg SAA, Bertini E, Brunner D, Brunetti-Pierri N, Cappa M, Cappuccio G, Chatterjee K, Chesover AD, Christian P, Coutant R, Craiu D, Crock P, Dewey C, Dica A, Dimitri P, Dubey R, Enderli A, Fairchild J, Gallichan J, Garibaldi LR, George B, Hackenberg A, Heinrich B, Huynh T, Kłosowska A, Lawson-Yuen A, Linder-Lucht M, Lyons G, Monti Lora F, Moran C, Müller KE, Paone L, Paul PG, Polak M, Porta F, Reinauer C, de Rijke YB, Seckold R, Menevşe TS, Simm P, Simon A, Spada M, Stoupa A, Szeifert L, Tonduti D, van Toor H, Turan S, Vanderniet J, de Waart M, van der Wal R, van der Walt A, van Wermeskerken AM, Wierzba J, Zibordi F, Zung A, Peeters RP, Visser WE
J Clin Endocrinol Metab 2022 Feb 17;107(3):e1136-e1147. doi: 10.1210/clinem/dgab750. PMID: 34679181Free PMC Article
Hematopoietic Stem-Cell Gene Therapy for Cerebral Adrenoleukodystrophy.
Eichler F, Duncan C, Musolino PL, Orchard PJ, De Oliveira S, Thrasher AJ, Armant M, Dansereau C, Lund TC, Miller WP, Raymond GV, Sankar R, Shah AJ, Sevin C, Gaspar HB, Gissen P, Amartino H, Bratkovic D, Smith NJC, Paker AM, Shamir E, O'Meara T, Davidson D, Aubourg P, Williams DA
N Engl J Med 2017 Oct 26;377(17):1630-1638. Epub 2017 Oct 4 doi: 10.1056/NEJMoa1700554. PMID: 28976817Free PMC Article
Genetic cerebellar ataxias.
Storey E
Semin Neurol 2014 Jul;34(3):280-92. Epub 2014 Sep 5 doi: 10.1055/s-0034-1386766. PMID: 25192506

Diagnosis

Lentiviral Gene Therapy for Cerebral Adrenoleukodystrophy.
Eichler F, Duncan CN, Musolino PL, Lund TC, Gupta AO, De Oliveira S, Thrasher AJ, Aubourg P, Kühl JS, Loes DJ, Amartino H, Smith N, Folloni Fernandes J, Sevin C, Sankar R, Hussain SA, Gissen P, Dalle JH, Platzbecker U, Downey GF, McNeil E, Demopoulos L, Dietz AC, Thakar HL, Orchard PJ, Williams DA
N Engl J Med 2024 Oct 10;391(14):1302-1312. doi: 10.1056/NEJMoa2400442. PMID: 39383459
Prenatal diagnosis of de novo int22h1/int22h2-mediated Xq28 duplication syndrome involving RAB39B following a previous ambiguous genitalia pregnancy.
Chien YC, Chen JS, Shiao YM, Hsiao CH
Taiwan J Obstet Gynecol 2022 May;61(3):501-503. doi: 10.1016/j.tjog.2022.03.017. PMID: 35595445
Genetic cerebellar ataxias.
Storey E
Semin Neurol 2014 Jul;34(3):280-92. Epub 2014 Sep 5 doi: 10.1055/s-0034-1386766. PMID: 25192506
Rett syndrome: clinical characteristics and recent genetic advances.
Ellaway C, Christodoulou J
Disabil Rehabil 2001 Feb 15-Mar 10;23(3-4):98-106. doi: 10.1080/09638280150504171. PMID: 11247014
Cerebral infarction in Menkes' disease.
Hsich GE, Robertson RL, Irons M, Soul JS, du Plessis AJ
Pediatr Neurol 2000 Nov;23(5):425-8. doi: 10.1016/s0887-8994(00)00207-1. PMID: 11118799

Therapy

Lentiviral Gene Therapy for Cerebral Adrenoleukodystrophy.
Eichler F, Duncan CN, Musolino PL, Lund TC, Gupta AO, De Oliveira S, Thrasher AJ, Aubourg P, Kühl JS, Loes DJ, Amartino H, Smith N, Folloni Fernandes J, Sevin C, Sankar R, Hussain SA, Gissen P, Dalle JH, Platzbecker U, Downey GF, McNeil E, Demopoulos L, Dietz AC, Thakar HL, Orchard PJ, Williams DA
N Engl J Med 2024 Oct 10;391(14):1302-1312. doi: 10.1056/NEJMoa2400442. PMID: 39383459
A Therapeutic Perspective of HDAC8 in Different Diseases: An Overview of Selective Inhibitors.
Fontana A, Cursaro I, Carullo G, Gemma S, Butini S, Campiani G
Int J Mol Sci 2022 Sep 2;23(17) doi: 10.3390/ijms231710014. PMID: 36077415Free PMC Article
Long-Term Efficacy of T3 Analogue Triac in Children and Adults With MCT8 Deficiency: A Real-Life Retrospective Cohort Study.
van Geest FS, Groeneweg S, van den Akker ELT, Bacos I, Barca D, van den Berg SAA, Bertini E, Brunner D, Brunetti-Pierri N, Cappa M, Cappuccio G, Chatterjee K, Chesover AD, Christian P, Coutant R, Craiu D, Crock P, Dewey C, Dica A, Dimitri P, Dubey R, Enderli A, Fairchild J, Gallichan J, Garibaldi LR, George B, Hackenberg A, Heinrich B, Huynh T, Kłosowska A, Lawson-Yuen A, Linder-Lucht M, Lyons G, Monti Lora F, Moran C, Müller KE, Paone L, Paul PG, Polak M, Porta F, Reinauer C, de Rijke YB, Seckold R, Menevşe TS, Simm P, Simon A, Spada M, Stoupa A, Szeifert L, Tonduti D, van Toor H, Turan S, Vanderniet J, de Waart M, van der Wal R, van der Walt A, van Wermeskerken AM, Wierzba J, Zibordi F, Zung A, Peeters RP, Visser WE
J Clin Endocrinol Metab 2022 Feb 17;107(3):e1136-e1147. doi: 10.1210/clinem/dgab750. PMID: 34679181Free PMC Article
Hematopoietic Stem-Cell Gene Therapy for Cerebral Adrenoleukodystrophy.
Eichler F, Duncan C, Musolino PL, Orchard PJ, De Oliveira S, Thrasher AJ, Armant M, Dansereau C, Lund TC, Miller WP, Raymond GV, Sankar R, Shah AJ, Sevin C, Gaspar HB, Gissen P, Amartino H, Bratkovic D, Smith NJC, Paker AM, Shamir E, O'Meara T, Davidson D, Aubourg P, Williams DA
N Engl J Med 2017 Oct 26;377(17):1630-1638. Epub 2017 Oct 4 doi: 10.1056/NEJMoa1700554. PMID: 28976817Free PMC Article
Mucopolysaccharidosis type II, Hunter's syndrome.
Tylki-Szymańska A
Pediatr Endocrinol Rev 2014 Sep;12 Suppl 1:107-13. PMID: 25345092

Prognosis

Lentiviral Gene Therapy for Cerebral Adrenoleukodystrophy.
Eichler F, Duncan CN, Musolino PL, Lund TC, Gupta AO, De Oliveira S, Thrasher AJ, Aubourg P, Kühl JS, Loes DJ, Amartino H, Smith N, Folloni Fernandes J, Sevin C, Sankar R, Hussain SA, Gissen P, Dalle JH, Platzbecker U, Downey GF, McNeil E, Demopoulos L, Dietz AC, Thakar HL, Orchard PJ, Williams DA
N Engl J Med 2024 Oct 10;391(14):1302-1312. doi: 10.1056/NEJMoa2400442. PMID: 39383459
Long-Term Efficacy of T3 Analogue Triac in Children and Adults With MCT8 Deficiency: A Real-Life Retrospective Cohort Study.
van Geest FS, Groeneweg S, van den Akker ELT, Bacos I, Barca D, van den Berg SAA, Bertini E, Brunner D, Brunetti-Pierri N, Cappa M, Cappuccio G, Chatterjee K, Chesover AD, Christian P, Coutant R, Craiu D, Crock P, Dewey C, Dica A, Dimitri P, Dubey R, Enderli A, Fairchild J, Gallichan J, Garibaldi LR, George B, Hackenberg A, Heinrich B, Huynh T, Kłosowska A, Lawson-Yuen A, Linder-Lucht M, Lyons G, Monti Lora F, Moran C, Müller KE, Paone L, Paul PG, Polak M, Porta F, Reinauer C, de Rijke YB, Seckold R, Menevşe TS, Simm P, Simon A, Spada M, Stoupa A, Szeifert L, Tonduti D, van Toor H, Turan S, Vanderniet J, de Waart M, van der Wal R, van der Walt A, van Wermeskerken AM, Wierzba J, Zibordi F, Zung A, Peeters RP, Visser WE
J Clin Endocrinol Metab 2022 Feb 17;107(3):e1136-e1147. doi: 10.1210/clinem/dgab750. PMID: 34679181Free PMC Article
Heart transplantation in two adolescents with Danon disease.
Oren D, Chau P, Manning M, Kwong J, Kaufman BD, Maeda K, Rosenthal DN, Hollander SA
Pediatr Transplant 2019 Mar;23(2):e13335. Epub 2018 Dec 7 doi: 10.1111/petr.13335. PMID: 30536852
Blaschkoid Skin Lesions in a Young Girl.
Turrentine JE, Gordon KA, Agim NG
JAMA Dermatol 2016 Jun 1;152(6):713-4. doi: 10.1001/jamadermatol.2016.0061. PMID: 26963772
Menkes syndrome and animal models.
Mercer JF
Am J Clin Nutr 1998 May;67(5 Suppl):1022S-1028S. doi: 10.1093/ajcn/67.5.1022S. PMID: 9587146

Clinical prediction guides

Lentiviral Gene Therapy for Cerebral Adrenoleukodystrophy.
Eichler F, Duncan CN, Musolino PL, Lund TC, Gupta AO, De Oliveira S, Thrasher AJ, Aubourg P, Kühl JS, Loes DJ, Amartino H, Smith N, Folloni Fernandes J, Sevin C, Sankar R, Hussain SA, Gissen P, Dalle JH, Platzbecker U, Downey GF, McNeil E, Demopoulos L, Dietz AC, Thakar HL, Orchard PJ, Williams DA
N Engl J Med 2024 Oct 10;391(14):1302-1312. doi: 10.1056/NEJMoa2400442. PMID: 39383459
Possible incomplete penetrance of Xq28 int22h-1/int22h-2 duplication.
Billes A, Pujalte M, Jedraszak G, Amsallem D, Boudry-Labis E, Boute O, Bouquillon S, Brischoux-Boucher E, Callier P, Coutton C, Denizet AA, Dieterich K, Kuentz P, Lespinasse J, Mazel B, Morin G, Amram F, Pennamen P, Rio M, Piard J, Putoux A, Rama M, Roze-Guillaumey V, Schluth-Bolard C, Till M, Trouvé C, Vieville G, Rooryck C, Sanlaville D, Chatron N
Clin Genet 2024 Sep;106(3):234-246. Epub 2024 Apr 1 doi: 10.1111/cge.14525. PMID: 38561231
Hematopoietic Stem-Cell Gene Therapy for Cerebral Adrenoleukodystrophy.
Eichler F, Duncan C, Musolino PL, Orchard PJ, De Oliveira S, Thrasher AJ, Armant M, Dansereau C, Lund TC, Miller WP, Raymond GV, Sankar R, Shah AJ, Sevin C, Gaspar HB, Gissen P, Amartino H, Bratkovic D, Smith NJC, Paker AM, Shamir E, O'Meara T, Davidson D, Aubourg P, Williams DA
N Engl J Med 2017 Oct 26;377(17):1630-1638. Epub 2017 Oct 4 doi: 10.1056/NEJMoa1700554. PMID: 28976817Free PMC Article
Recurrent deletion of ZNF630 at Xp11.23 is not associated with mental retardation.
Lugtenberg D, Zangrande-Vieira L, Kirchhoff M, Whibley AC, Oudakker AR, Kjaergaard S, Vianna-Morgante AM, Kleefstra T, Ruiter M, Jehee FS, Ullmann R, Schwartz CE, Stratton M, Raymond FL, Veltman JA, Vrijenhoek T, Pfundt R, Schuurs-Hoeijmakers JH, Hehir-Kwa JY, Froyen G, Chelly J, Ropers HH, Moraine C, Gècz J, Knijnenburg J, Kant SG, Hamel BC, Rosenberg C, van Bokhoven H, de Brouwer AP
Am J Med Genet A 2010 Mar;152A(3):638-45. doi: 10.1002/ajmg.a.33292. PMID: 20186789
Menkes syndrome and animal models.
Mercer JF
Am J Clin Nutr 1998 May;67(5 Suppl):1022S-1028S. doi: 10.1093/ajcn/67.5.1022S. PMID: 9587146

Recent systematic reviews

Enzyme replacement therapy with idursulfase for mucopolysaccharidosis type II (Hunter syndrome).
da Silva EM, Strufaldi MW, Andriolo RB, Silva LA
Cochrane Database Syst Rev 2016 Feb 5;2(2):CD008185. doi: 10.1002/14651858.CD008185.pub4. PMID: 26845288Free PMC Article
Enzyme replacement therapy with idursulfase for mucopolysaccharidosis type II (Hunter syndrome).
da Silva EM, Strufaldi MW, Andriolo RB, Silva LA
Cochrane Database Syst Rev 2014 Jan 8;(1):CD008185. doi: 10.1002/14651858.CD008185.pub3. PMID: 24399699
Enzyme replacement therapy with idursulfase for mucopolysaccharidosis type II (Hunter syndrome).
da Silva EM, Strufaldi MW, Andriolo RB, Silva LA
Cochrane Database Syst Rev 2011 Nov 9;(11):CD008185. doi: 10.1002/14651858.CD008185.pub2. PMID: 22071845

Supplemental Content

Table of contents

    Clinical resources

    Practice guidelines

    • PubMed
      See practice and clinical guidelines in PubMed. The search results may include broader topics and may not capture all published guidelines. See the FAQ for details.

    Reviews

    Related information

    • MeSH
      Related Medical Subject Headings
    • OMIM
      Related records in OMIM
    • PMC Articles
      Related information in PubMed Central Links
    • PubMed
      Related literature resources in PubMed
    • PubMed (OMIM)
      Related literature resources in PubMed

    Recent activity

    Clear Turn Off Turn On

    Your browsing activity is empty.

    Activity recording is turned off.

    Turn recording back on

    See more...