Senior–Løken syndrome

Senior–Løken syndrome is a congenital eye disorder, first characterized in 1961.[1][2][3] It is a rare, ciliopathic, autosomal recessive disorder characterized by juvenile nephronophthis and progressive eye disease.[4]

Senior–Løken syndrome
Other namesRenal dysplasia-retinal aplasia syndrome
Senior–Løken syndrome is an autosomal recessive inherited condition
SpecialtyMedical genetics 

Genetics

Genes involved include:

Type OMIM Genes
SLSN1 266900 NPHP1
SLSN3 606995 unknown
SLSN4 606996 NPHP4
SLSN5 609254 NPHP5/IQCB1[5]
SLSN6 610189 NPHP6/CEP290
SLSN7 613615 SDCCAG8

Pathophysiology

The cause of Senior–Løken syndrome type 5 has been identified to mutation in the NPHP1 gene which adversely affects the protein formation mechanism of the cilia.[6]

Relation to other rare genetic disorders

Recent findings in genetic research have suggested that a large number of genetic disorders, both genetic syndromes and genetic diseases, that were not previously identified in the medical literature as related, may be, in fact, highly related in the genetypical root cause of the widely varying, phenotypically-observed disorders. Such diseases are becoming known as ciliopathies. Known ciliopathies include primary ciliary dyskinesia, Bardet–Biedl syndrome, polycystic kidney and liver disease, nephronophthisis, Alström syndrome, Meckel–Gruber syndrome and some forms of retinal degeneration.[4]

Diagnosis

Treatment
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References
  1. synd/1861 at Who Named It?
  2. Senior B, Friedmann AI, Brando JL (1961). "Juvenile familial nephropathy with tapetoretinal degeneration. A new oculorenal dystrophy". Am. J. Ophthalmol. 52: 625–33. doi:10.1016/0002-9394(61)90147-7. PMID 13910672.
  3. Loken AC, Hanssen O, Halvorsen S, Jolster NJ (1961). "Hereditary renal dysplasia and blindness". Acta Paediatrica. 50 (2): 177–84. doi:10.1111/j.1651-2227.1961.tb08037.x. PMID 13763238.
  4. Badano, Jose L.; Norimasa Mitsuma; Phil L. Beales; Nicholas Katsanis (2006). "The Ciliopathies: An Emerging Class of Human Genetic Disorders". Annual Review of Genomics and Human Genetics. 7 (1): 125–148. doi:10.1146/annurev.genom.7.080505.115610. PMID 16722803..
  5. Otto EA, Loeys B, Khanna H, et al. (March 2005). "Nephrocystin-5, a ciliary IQ domain protein, is mutated in Senior-Loken syndrome and interacts with RPGR and calmodulin". Nat. Genet. 37 (3): 282–8. doi:10.1038/ng1520. PMID 15723066. S2CID 4972004.
  6. Davenport, James R.; Bradley K. Yoder (2005). "An incredible decade for the primary cilium : a look at a once-forgotten organelle". American Journal of Physiology. Renal Physiology. American Physiological Society. 289 (6): F1159–F1169. doi:10.1152/ajprenal.00118.2005. PMID 16275743..
Classification
External resources


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