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Syndromic X-linked intellectual disability 7(MRXS7)

MedGen UID:
337403
•Concept ID:
C1846170
•
Disease or Syndrome
Synonyms: Ahmad X-linked Mental retardation syndrome; Mental retardation X-linked syndromic 7; Mental retardation, obesity, hypogonadism, and tapering fingers
SNOMED CT: Syndromic X-linked intellectual disability type 7 (719160009); X-linked intellectual disability Ahmad type (719160009)
Modes of inheritance:
X-linked recessive inheritance
MedGen UID:
375779
•Concept ID:
C1845977
•
Finding
Source: Orphanet
A mode of inheritance that is observed for recessive traits related to a gene encoded on the X chromosome. In the context of medical genetics, X-linked recessive disorders manifest in males (who have one copy of the X chromosome and are thus hemizygotes), but generally not in female heterozygotes who have one mutant and one normal allele.
See: This record
X-linked recessive inheritance (Orphanet)
 
Monarch Initiative: MONDO:0010270
OMIM®: 300218
Orphanet: ORPHA85274

Definition

This syndrome has characteristics of X-linked intellectual deficit, obesity, hypogonadism, and tapering fingers. It has been described in ten males from a large Pakistani family. The causative gene has been located to Xp11.3-Xq23. [from SNOMEDCT_US]

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

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVSyndromic X-linked intellectual disability 7
Follow this link to review classifications for Syndromic X-linked intellectual disability 7 in Orphanet.

Professional guidelines

PubMed

Phenotypes and Genotypes in Patients with SMC1A-Related Developmental and Epileptic Encephalopathy.
Bozarth XL, Lopez J, Fang H, Lee-Eng J, Duan Z, Deng X
Genes (Basel) 2023 Mar 31;14(4) doi: 10.3390/genes14040852. PMID: 37107610Free PMC Article
Evaluation of X-Linked Adrenoleukodystrophy Newborn Screening in North Carolina.
Lee S, Clinard K, Young SP, Rehder CW, Fan Z, Calikoglu AS, Bali DS, Bailey DB Jr, Gehtland LM, Millington DS, Patel HS, Beckloff SE, Zimmerman SJ, Powell CM, Taylor JL
JAMA Netw Open 2020 Jan 3;3(1):e1920356. doi: 10.1001/jamanetworkopen.2019.20356. PMID: 32003821Free PMC Article
Molecular diagnosis of Menkes disease: genotype-phenotype correlation.
Møller LB, Mogensen M, Horn N
Biochimie 2009 Oct;91(10):1273-7. Epub 2009 Jun 6 doi: 10.1016/j.biochi.2009.05.011. PMID: 19501626

Recent clinical studies

Etiology

X-Linked Epilepsies: A Narrative Review.
Bernardo P, Cuccurullo C, Rubino M, De Vita G, Terrone G, Bilo L, Coppola A
Int J Mol Sci 2024 Apr 8;25(7) doi: 10.3390/ijms25074110. PMID: 38612920Free PMC Article
Self-reported quality of life in symptomatic and asymptomatic women with X-linked adrenoleukodystrophy.
Schäfer L, Roicke H, Bergner CC, Köhler W
Brain Behav 2023 Mar;13(3):e2878. Epub 2023 Feb 7 doi: 10.1002/brb3.2878. PMID: 36748403Free PMC Article
Epilepsy and Sleep in the ATR-X Syndrome.
Mierlo PV, Braakman H, Vandenbussche N, Schelhaas HJ, Pillen S
Neuropediatrics 2022 Apr;53(2):109-114. Epub 2021 Dec 21 doi: 10.1055/s-0041-1740551. PMID: 34933379
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
Fragile X syndrome.
Laxova R
Adv Pediatr 1994;41:305-42. PMID: 7992687

Diagnosis

Landscape of genetic infantile epileptic spasms syndrome-A multicenter cohort of 124 children from India.
Nagarajan B, Gowda VK, Yoganathan S, Sharawat IK, Srivastava K, Vora N, Badheka R, Danda S, Kalane U, Kaur A, Madaan P, Mehta S, Negi S, Panda PK, Rajadhyaksha S, Saini AG, Saini L, Shah S, Srinivasan VM, Suthar R, Thomas M, Vyas S, Sankhyan N, Sahu JK
Epilepsia Open 2023 Dec;8(4):1383-1404. Epub 2023 Aug 25 doi: 10.1002/epi4.12811. PMID: 37583270Free PMC Article
NAA10-related syndrome.
Wu Y, Lyon GJ
Exp Mol Med 2018 Jul 27;50(7):1-10. doi: 10.1038/s12276-018-0098-x. PMID: 30054457Free PMC Article
Exome sequencing covers >98% of mutations identified on targeted next generation sequencing panels.
LaDuca H, Farwell KD, Vuong H, Lu HM, Mu W, Shahmirzadi L, Tang S, Chen J, Bhide S, Chao EC
PLoS One 2017;12(2):e0170843. Epub 2017 Feb 2 doi: 10.1371/journal.pone.0170843. PMID: 28152038Free 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
Fragile X syndrome.
Laxova R
Adv Pediatr 1994;41:305-42. PMID: 7992687

Therapy

Exome sequencing covers >98% of mutations identified on targeted next generation sequencing panels.
LaDuca H, Farwell KD, Vuong H, Lu HM, Mu W, Shahmirzadi L, Tang S, Chen J, Bhide S, Chao EC
PLoS One 2017;12(2):e0170843. Epub 2017 Feb 2 doi: 10.1371/journal.pone.0170843. PMID: 28152038Free 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 2016 Feb 5;2(2):CD008185. doi: 10.1002/14651858.CD008185.pub4. PMID: 26845288Free PMC Article
HDAC8: a multifaceted target for therapeutic interventions.
Chakrabarti A, Oehme I, Witt O, Oliveira G, Sippl W, Romier C, Pierce RJ, Jung M
Trends Pharmacol Sci 2015 Jul;36(7):481-92. Epub 2015 May 23 doi: 10.1016/j.tips.2015.04.013. PMID: 26013035
Small amounts of functional ATP7A protein permit mild phenotype.
Møller LB
J Trace Elem Med Biol 2015;31:173-7. Epub 2014 Aug 8 doi: 10.1016/j.jtemb.2014.07.022. PMID: 25172213
Fragile X syndrome.
Laxova R
Adv Pediatr 1994;41:305-42. PMID: 7992687

Prognosis

Phenotypes and Genotypes in Patients with SMC1A-Related Developmental and Epileptic Encephalopathy.
Bozarth XL, Lopez J, Fang H, Lee-Eng J, Duan Z, Deng X
Genes (Basel) 2023 Mar 31;14(4) doi: 10.3390/genes14040852. PMID: 37107610Free PMC Article
Semaphorin-Plexin Signaling: From Axonal Guidance to a New X-Linked Intellectual Disability Syndrome.
Steele JL, Morrow MM, Sarnat HB, Alkhunaizi E, Brandt T, Chitayat DA, DeFilippo CP, Douglas GV, Dubbs HA, Elloumi HZ, Glassford MR, Hannibal MC, Héron B, Kim LE, Marco EJ, Mignot C, Monaghan KG, Myers KA, Parikh S, Quinonez SC, Rajabi F, Shankar SP, Shinawi MS, van de Kamp JJP, Veerapandiyan A, Waldman AT, Graf WD
Pediatr Neurol 2022 Jan;126:65-73. Epub 2021 Oct 18 doi: 10.1016/j.pediatrneurol.2021.10.008. PMID: 34740135
Impaired mitochondrial quality control in Rett Syndrome.
Crivellari I, Pecorelli A, Cordone V, Marchi S, Pinton P, Hayek J, Cervellati C, Valacchi G
Arch Biochem Biophys 2021 Mar 30;700:108790. Epub 2021 Feb 4 doi: 10.1016/j.abb.2021.108790. PMID: 33549528
Evaluation of X-Linked Adrenoleukodystrophy Newborn Screening in North Carolina.
Lee S, Clinard K, Young SP, Rehder CW, Fan Z, Calikoglu AS, Bali DS, Bailey DB Jr, Gehtland LM, Millington DS, Patel HS, Beckloff SE, Zimmerman SJ, Powell CM, Taylor JL
JAMA Netw Open 2020 Jan 3;3(1):e1920356. doi: 10.1001/jamanetworkopen.2019.20356. PMID: 32003821Free PMC Article
Exome sequencing covers >98% of mutations identified on targeted next generation sequencing panels.
LaDuca H, Farwell KD, Vuong H, Lu HM, Mu W, Shahmirzadi L, Tang S, Chen J, Bhide S, Chao EC
PLoS One 2017;12(2):e0170843. Epub 2017 Feb 2 doi: 10.1371/journal.pone.0170843. PMID: 28152038Free PMC Article

Clinical prediction guides

Landscape of genetic infantile epileptic spasms syndrome-A multicenter cohort of 124 children from India.
Nagarajan B, Gowda VK, Yoganathan S, Sharawat IK, Srivastava K, Vora N, Badheka R, Danda S, Kalane U, Kaur A, Madaan P, Mehta S, Negi S, Panda PK, Rajadhyaksha S, Saini AG, Saini L, Shah S, Srinivasan VM, Suthar R, Thomas M, Vyas S, Sankhyan N, Sahu JK
Epilepsia Open 2023 Dec;8(4):1383-1404. Epub 2023 Aug 25 doi: 10.1002/epi4.12811. PMID: 37583270Free PMC Article
Phenotypes and Genotypes in Patients with SMC1A-Related Developmental and Epileptic Encephalopathy.
Bozarth XL, Lopez J, Fang H, Lee-Eng J, Duan Z, Deng X
Genes (Basel) 2023 Mar 31;14(4) doi: 10.3390/genes14040852. PMID: 37107610Free PMC Article
Semaphorin-Plexin Signaling: From Axonal Guidance to a New X-Linked Intellectual Disability Syndrome.
Steele JL, Morrow MM, Sarnat HB, Alkhunaizi E, Brandt T, Chitayat DA, DeFilippo CP, Douglas GV, Dubbs HA, Elloumi HZ, Glassford MR, Hannibal MC, Héron B, Kim LE, Marco EJ, Mignot C, Monaghan KG, Myers KA, Parikh S, Quinonez SC, Rajabi F, Shankar SP, Shinawi MS, van de Kamp JJP, Veerapandiyan A, Waldman AT, Graf WD
Pediatr Neurol 2022 Jan;126:65-73. Epub 2021 Oct 18 doi: 10.1016/j.pediatrneurol.2021.10.008. PMID: 34740135
HUWE1 variants cause dominant X-linked intellectual disability: a clinical study of 21 patients.
Moortgat S, Berland S, Aukrust I, Maystadt I, Baker L, Benoit V, Caro-Llopis A, Cooper NS, Debray FG, Faivre L, Gardeitchik T, Haukanes BI, Houge G, Kivuva E, Martinez F, Mehta SG, Nassogne MC, Powell-Hamilton N, Pfundt R, Rosello M, Prescott T, Vasudevan P, van Loon B, Verellen-Dumoulin C, Verloes A, Lippe CV, Wakeling E, Wilkie AOM, Wilson L, Yuen A, Study D, Low KJ, Newbury-Ecob RA
Eur J Hum Genet 2018 Jan;26(1):64-74. Epub 2017 Nov 27 doi: 10.1038/s41431-017-0038-6. PMID: 29180823Free PMC Article
Exome sequencing covers >98% of mutations identified on targeted next generation sequencing panels.
LaDuca H, Farwell KD, Vuong H, Lu HM, Mu W, Shahmirzadi L, Tang S, Chen J, Bhide S, Chao EC
PLoS One 2017;12(2):e0170843. Epub 2017 Feb 2 doi: 10.1371/journal.pone.0170843. PMID: 28152038Free PMC Article

Recent systematic reviews

MECP2-related conditions in males: A systematic literature review and 8 additional cases.
Inuzuka LM, Guerra-Peixe M, Macedo-Souza LI, Pedreira CC, Gurgel-Giannetti J, Monteiro FP, Ramos L, Costa LA, Crippa ACS, Lourenco CM, Pachito DV, Sukys-Claudino L, Gaspar LS, Antoniuk SA, Dutra LPS, Diniz SSL, Pires RB, Garzon E, Kok F
Eur J Paediatr Neurol 2021 Sep;34:7-13. Epub 2021 Jun 21 doi: 10.1016/j.ejpn.2021.05.013. PMID: 34271245
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

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