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Zecevic N, Arsenijevic V, Manolakos E, Papoulidis I, Theocharis G, Sartsidis A, Tsagas T, Tziotis I, Dagklis T, Kalogeros G, Tsakiridis I, Filipovic Stankovic M, Eleftheriades M. New Compound Heterozygous Splice Site Mutations of the Skeletal Muscle Ryanodine Receptor ( RYR1) Gene Manifest Fetal Akinesia: A Linkage with Congenital Myopathies. Mol Syndromol 2020; 11:104-109. [PMID: 32655342 DOI: 10.1159/000507034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2020] [Indexed: 11/19/2022] Open
Abstract
Mutations in the skeletal muscle ryanodine receptor (RYR1) gene have been linked to malignant hyperthermia susceptibility, central core disease, and minicore myopathy with external ophthalmoplegia. RYR1 is an intracellular calcium release channel and plays a crucial role in the sarcoplasmic reticulum and transverse tubule connection. Here, we report 2 fetuses from the same parents with compound heterozygous mutations in the RYR1 gene (c.10347+1G>A and c.10456-2Α>G) who presented with fetal akinesia and polyhydramnios at 27 and 19 weeks of gestation with intrauterine growth restriction in the third pregnancy. The prospective parents of the fetuses were heterozygous carriers for c.10456-2Α>G (mother) and c.10347+1G>A (father). Both mutations affect splice sites resulting in dysfunctional protein forms probably missing crucial domains of the C-terminus. Our findings reveal a new RYR1 splice site mutation (c.10456-2Α>G) that may be associated with the clinical features of myopathies, expanding the RYR1 spectrum related to these pathologies.
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Affiliation(s)
- Nebojsa Zecevic
- Obstetric and Gynecological Clinic Narodni Front, Belgrade, Serbia
| | | | | | | | | | | | - Tryfon Tsagas
- Department of Obstetrics and Gynecology, IASO Maternity Hospital, Athens, Greece
| | - Ioannis Tziotis
- Department of Obstetrics and Gynecology, IASO Maternity Hospital, Athens, Greece
| | - Themistoklis Dagklis
- 3rd Department of Obstetrics and Gynecology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Georgios Kalogeros
- Department of Obstetrics and Gynecology, IASO Thessaly Maternity Hospital, Larissa, Greece
| | - Ioannis Tsakiridis
- 3rd Department of Obstetrics and Gynecology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - Makarios Eleftheriades
- 2nd Department of Obstetrics and Gynecology, Aretaieio Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
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