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Intellectual developmental disorder, autosomal recessive 77(MRT77)

MedGen UID:
1823966
Concept ID:
C5774193
Mental or Behavioral Dysfunction
Synonym: MRT77
 
Gene (location): CEP104 (1p36.32)
 
Monarch Initiative: MONDO:0031031
OMIM®: 619988

Definition

Autosomal recessive intellectual developmental disorder-77 (MRT77) is a nonsyndromic neurodevelopmental disorder characterized by global developmental delay with variably impaired cognitive development apparent from infancy. Affected individuals usually have delayed walking, sometimes with an unsteady gait, and may have poor speech and communication. Brain imaging is normal, and there are no additional significant neurologic abnormalities (Khoshbakht et al., 2021). Mutation in the CEP104 gene also causes a form of Joubert syndrome (JBTS25; 616781). [from OMIM]

Clinical features

From HPO
Unsteady gait
MedGen UID:
68544
Concept ID:
C0231686
Finding
A shaky or wobbly manner of walking.
Head tremor
MedGen UID:
68690
Concept ID:
C0239882
Finding
An unintentional, oscillating to-and-fro muscle movement affecting head movement.
Self-biting
MedGen UID:
603118
Concept ID:
C0424375
Finding
Habitual biting of one's own body.
Global developmental delay
MedGen UID:
107838
Concept ID:
C0557874
Finding
A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age.
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.
Joint hypermobility
MedGen UID:
336793
Concept ID:
C1844820
Finding
The capability that a joint (or a group of joints) has to move, passively and/or actively, beyond normal limits along physiological axes.
Hypernasal speech
MedGen UID:
99115
Concept ID:
C0454555
Finding
A type of speech characterized by the presence of an abnormally increased nasal airflow during speech associated with structural abnormality of the nasal passages.
Poor wound healing
MedGen UID:
377525
Concept ID:
C1851789
Finding
A reduced ability to heal cutaneous wounds.
Nystagmus
MedGen UID:
45166
Concept ID:
C0028738
Disease or Syndrome
Rhythmic, involuntary oscillations of one or both eyes related to abnormality in fixation, conjugate gaze, or vestibular mechanisms.

Recent clinical studies

Etiology

Stelten BML, Bonnot O, Huidekoper HH, van Spronsen FJ, van Hasselt PM, Kluijtmans LAJ, Wevers RA, Verrips A
J Inherit Metab Dis 2018 Jul;41(4):641-646. Epub 2017 Sep 11 doi: 10.1007/s10545-017-0086-7. PMID: 28894950
Iqbal Z, van Bokhoven H
Hum Hered 2014;77(1-4):150-60. Epub 2014 Jul 29 doi: 10.1159/000360539. PMID: 25060278

Diagnosis

Horber V, Andersen GL, Arnaud C, De La Cruz J, Dakovic I, Greitane A, Hensey O, Himmelmann K, Hollody K, Horridge K, Künzle CT, Marcelli M, Ortibus E, Papavasiliou A, Perra O, Platt MJ, Rackauskaite G, Sigurdardottir S, Troha Gergeli A, Virella D, Krägeloh-Mann I, Sellier E
Neurology 2023 Dec 12;101(24):e2509-e2521. Epub 2023 Oct 19 doi: 10.1212/WNL.0000000000207851. PMID: 37857495Free PMC Article
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
Zech M, Brunet T, Škorvánek M, Blaschek A, Vill K, Hanker B, Hüning I, Haň V, Došekova P, Gdovinová Z, Alhaddad B, Berutti R, Strom TM, Růžička E, Kamsteeg EJ, van der Smagt JJ, Wagner M, Jech R, Winkelmann J
Parkinsonism Relat Disord 2020 Aug;77:70-75. Epub 2020 Jun 29 doi: 10.1016/j.parkreldis.2020.06.027. PMID: 32629324
Reuter MS, Tawamie H, Buchert R, Hosny Gebril O, Froukh T, Thiel C, Uebe S, Ekici AB, Krumbiegel M, Zweier C, Hoyer J, Eberlein K, Bauer J, Scheller U, Strom TM, Hoffjan S, Abdelraouf ER, Meguid NA, Abboud A, Al Khateeb MA, Fakher M, Hamdan S, Ismael A, Muhammad S, Abdallah E, Sticht H, Wieczorek D, Reis A, Abou Jamra R
JAMA Psychiatry 2017 Mar 1;74(3):293-299. doi: 10.1001/jamapsychiatry.2016.3798. PMID: 28097321
Hoffmann K, Heller R
Best Pract Res Clin Endocrinol Metab 2011 Feb;25(1):77-100. doi: 10.1016/j.beem.2010.09.004. PMID: 21396576

Therapy

Stelten BML, Bonnot O, Huidekoper HH, van Spronsen FJ, van Hasselt PM, Kluijtmans LAJ, Wevers RA, Verrips A
J Inherit Metab Dis 2018 Jul;41(4):641-646. Epub 2017 Sep 11 doi: 10.1007/s10545-017-0086-7. PMID: 28894950

Prognosis

Zech M, Brunet T, Škorvánek M, Blaschek A, Vill K, Hanker B, Hüning I, Haň V, Došekova P, Gdovinová Z, Alhaddad B, Berutti R, Strom TM, Růžička E, Kamsteeg EJ, van der Smagt JJ, Wagner M, Jech R, Winkelmann J
Parkinsonism Relat Disord 2020 Aug;77:70-75. Epub 2020 Jun 29 doi: 10.1016/j.parkreldis.2020.06.027. PMID: 32629324

Clinical prediction guides

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
Zech M, Brunet T, Škorvánek M, Blaschek A, Vill K, Hanker B, Hüning I, Haň V, Došekova P, Gdovinová Z, Alhaddad B, Berutti R, Strom TM, Růžička E, Kamsteeg EJ, van der Smagt JJ, Wagner M, Jech R, Winkelmann J
Parkinsonism Relat Disord 2020 Aug;77:70-75. Epub 2020 Jun 29 doi: 10.1016/j.parkreldis.2020.06.027. PMID: 32629324
Nowakowska B, Kutkowska-Kaźmierczak A, Stankiewicz P, Bocian E, Obersztyn E, Ou Z, Cheung SW, Cai WW
Am J Med Genet A 2007 Aug 15;143A(16):1885-9. doi: 10.1002/ajmg.a.31845. PMID: 17632781
O'Driscoll M, Dobyns WB, van Hagen JM, Jeggo PA
Am J Hum Genet 2007 Jul;81(1):77-86. Epub 2007 May 17 doi: 10.1086/518696. PMID: 17564965Free PMC Article
Cormier-Daire V, Chauvet ML, Lyonnet S, Briard ML, Munnich A, Le Merrer M
J Med Genet 2000 Jul;37(7):520-4. doi: 10.1136/jmg.37.7.520. PMID: 10882755Free PMC Article

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