SCIENTIFIC BACKGROUND

AHI1, ANKS6, CC2D2A, CEP164, CEP290, CEP83, DCDC2, GLIS2, IFT172, INVS, IQCB1, MAPKBP1, NEK8, NPHP1, NPHP3, NPHP4, PAX2, RPGRIP1L, SDCCAG8, SLC41A1, TMEM216, TMEM237, TMEM67, TTC21B, WDR19, XPNPEP3, ZNF423

Scientific Background

Nephronophthisis (NPHP) is an autosomal recessive inherited tubulointerstitial kidney disease, which belongs to the so-called ciliopathies. It is caused by a dysfunction of primary cilia. The incidence in Europe is estimated at approximately 1:50,000. The kidneys may be affected in isolation, but extrarenal manifestations such as retinitis pigmentosa (Senior-Løken syndrome), oculomotor apraxia (Cogan syndrome) as well as optic nerve coloboma and cerebellar vermis aplasia (Joubert syndrome) are also observed in 10‑40% of patients. The disease is phenotypically and genetically heterogeneous. So far, pathogenic variants in over 25 genes have been identified in association with NPHP. NPHP is divided into infantile (<4 years), juvenile (about 13 years) and adolescent/adult (about 19 years) forms depending on the average age at which terminal renal failure occurs. The most frequent form is juvenile NPHP, in which a homozygous deletion of the NPHP1 gene can be found in about 30-60% of patients. No genetic cause can be found in about 40-60% of NPHP patients.

 

References

Titieni et König 2018, medgen 30:461 / Luo et Tao 2018, Nephrology (Carlton) 23:904 / König et al. 2017, Clin J Am Soc Nephrol 12:1974 / Chaki et al. 2011, Kidney Int 80:1239 / Hoefele et al. 2007, Der Nephrologe 2:372 / Hildebrandt & Omran 2001, Pediatr Nephrol 16:168 / Hildebrandt et al. 1997, Kidney 51:261

GENES

AHI1, ANKS6, CC2D2A, CEP164, CEP290, CEP83, DCDC2, GLIS2, IFT172, INVS, IQCB1, MAPKBP1, NEK8, NPHP1, NPHP3, NPHP4, PAX2, RPGRIP1L, SDCCAG8, SLC41A1, TMEM216, TMEM237, TMEM67, TTC21B, WDR19, XPNPEP3, ZNF423

ASSOCIATED TESTS

How to order

LATEST ARTICLES

A recent study highlights promising outcomes for BRCA variant carriers with breast cancer undergoing breast-conserving therapy. Analyzing 172 women, ...

Read more

Epidermolysis bullosa (EB), sometimes called butterfly skin, is a group of rare skin diseases with a common symptom: fragile skin that tears and blis...

Read more

In the rapidly evolving field of human genetics diagnostics, laboratories face the challenge of keeping up with the latest advancements in technology...

Read more

Medicine as we know it has been around for just over 100 years. Before this, alcohol and opium were the main forms of pain relief in Europe. The deve...

Read more

Below you can read the two winning essays from the second annual DNA essay competition. The subject of the essay was “Family history is one of the ...

Read more

Mosaicism is the presence of two or more genetically different sets of cells within the same person. It is a biological phenomenon that may have no e...

Read more

Cystic fibrosis (CF) is a life-threatening, progressive, inherited condition that causes severe damage to the body, mainly to organs of the respirato...

Read more

Cancer can sometimes run in families; in fact, it is estimated that 5-10% of all cancer cases are inherited. This includes up to 10% of breast cancer...

Read more

Mosaicism is a biological phenomenon in which a person has two or more genetically different sets of cells. Although mosaicism may have no effect, it...

Read more

Background information on in vitro diagnostic services Laboratory-based testing methods and medical devices play a critical role in diagnosis and ...

Read more