Retinitis Pigmentosa 56

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Retrieved

2019-09-22

Source

Omim

Trials

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Genes

C8orf37, PDE6B, PDE6A, CRX, RPGR, RPE65, PDE6G, LRAT, ABCA4, EYS, MERTK, IMPDH1, ROM1, RHO, USH2A, CRB1, CNGB1, RPGRIP1, GUCY2D, RP2, NRL, RBP3, CLRN1, RDH12, SAG, SPATA7, CNGA1, ARL6, AIPL1, REEP6

C8orf37, PDE6B, PDE6A, CRX, RPGR, RPE65, PDE6G, LRAT, ABCA4, EYS, MERTK, IMPDH1, ROM1, RHO, USH2A, CRB1, CNGB1, RPGRIP1, GUCY2D, RP2, NRL, RBP3, CLRN1, RDH12, SAG, SPATA7, CNGA1, ARL6, AIPL1, REEP6, RGR, DHX38, GUCA1B, OFD1, IDH3A, IDH3B, PRPF8, RP1, FAM161A, TULP1, SNRNP200, PRPF31, CERKL, NR2E3, CA4, MAK, PRCD, PRPF3, RLBP1, PROM1, PCARE, CHM, ARL2BP, TOPORS, BBS1, CYP4V2, BEST1, DHDDS, KLHL7, IMPG2, HGSNAT, IFT140, PRPF6, BBS2, TTC8, AHI1, SCAPER, CLN3, IFT172, CDHR1, KIZ, FLVCR1, TTPA, ARL3, PRPF4, AGBL5, RP9, SLC7A14, FSCN2, POMGNT1, ZNF513, ZNF408, RBP4, ABHD12, UNC119, NEK2, AHR, TUB, SEMA4A, ATF6, IFT88, FOXI2, UBAP1L, CCZ1B, CROCC, PDAP1, FAM71A, KIAA1549, IRX5, ARHGEF18, C1QTNF5, PRTFDC1, SLC37A3, NAALADL1, CRB2, NGF, CEP250, CWC27, CCDC66, GRIN2B, PRPH2, AGTPBP1, SLC6A6, AIFM1, FGFR2, KL, MT2A, PTEN, MYO7A, CEP290, GUCA1A, RDH5, CDH23, IQCB1, MSTO1, CACNA1A, BBS4, ATXN7, USH1C, CFAP410, ATP6, PANK2, MKKS, BBS9, SLC24A1, PEX1, RP1L1, HADHA, PNPLA6, SDCCAG8, BBS12, NDUFAF5, RRM2B, PDHA1, NDUFS8, NDUFV2, LZTFL1, FOXRED1, POMT2, RCBTB1, TST, FKRP, BBS7, CNGB3, NCAPG2, NPHP1, MKS1, NDUFB11, SURF1, SDHB, PEX2, WDPCP, PRPH, NDUFV1, NDUFA13, SCN1A, SCO1, SDHA, SDHD, PHYH, TACO1, LIPT1, SLC19A1, NDUFA12, PEX5, NGLY1, ALMS1, LARGE1, NDUFS4, PRDX1, NDUFS3, POLR3A, MFSD8, ZDHHC24, RNASEH1, CTNS, ARL13B, TRIM32, NIPAL1, ECHS1, FASTKD2, ERCC3, POMT1, ERCC6, ERG, IFT27, NDUFAF6, BBS5, NDUFS2, CLRN1-AS1, COX20, CYGB, COX15, COX10, COX8A, COX7B, CDH23-AS1, ACOX1, C8orf37-AS1, MMACHC, JAG1, AMACR, AIRE, PET100, SDHAF1, ZFYVE26, PHF3, ATP1A2, BCS1L, NDUFS7, CAV1, TTLL5, VSX2, ERCC8, COX6B1, PRRT2, MTFMT, GSS, COL18A1, GMPPB, HADHB, ND1, ND2, ND3, ND4, ND5, ND6, TRNK, TRNL1, TRNN, TRNS1, TRNV, TRNW, TRIM37, BBS10, NDUFA2, NDUFA4, NDUFA9, NDUFA10, NDUFS1, SLC19A3, WFS1, BBIP1, COA8, HCCS, NDUFAF2, HADH, TMEM14B, COX14, PLXNA2, LSM2, TRNT1, CLU, MFRP, PCDH15, DHX16, PTPRC, SLU7, KLK3, SIGMAR1, NXNL1, CLTA, CNTF, NT5C2, RPE, PROS1, PLAG1, NPHP4, TIMP3, PSAT1, NPEPPS, MYP2, CXCR6, RIMS1, RRH, SLC19A2, EXOSC2, ADIPOR1, LPAR2, USP9X, COG4, VCP, EDN1, LCA5, PDC, ATN1, OTX2, OTC, CNOT3, MVK, LPCAT1, MMP9, EDNRA, RCC1, EPO, INS, FANCF, HSPA4, HK1, GNAT1, HIF1A, OPN4, GSN, SERPINF1, GPR42, NSMCE3, GRK1, ALDH3A2, SFRP2, ACKR3, ADRA1A, ARL2, ATXN2, CC2D2A, ADRA2B, WDR19, SOD3, PLIN2, SSTR4, BRS3, STC1, ACTB, NRG4, TWIST2, GRK7, POC5, ARMS2, MFT2, SAMD11, SAMD7, NOC2L, JAKMIP1, MIR204, POLDIP2, GUCY2EP, LIN28B, NPHP3, ARSI, RD3, CENPV, PITPNM3, INVS, CENPK, TENT5A, CYCS, DCUN1D1, TWNK, SLC2A4RG, TBX20, RDH11, PNPLA2, KIDINS220, NGB, MPP4, NYX, TNMD, ENFL2, TUT1, DNER, FTO, ELOVL6, ALG12, RNF19A, COQ8B, SETD2, KLF15, PDZD7, HKDC1, C5AR2, DNAJC17, ADGRV1, CEP78, GNPTG, AAVS1, THBS2, WHRN, MMP2, HMOX1, HK2, HGF, GRM5, GRM1, GRB10, GLO1, GK, GJB2, GDNF, GDF2, G6PD, FRZB, FN1, FGF5, FGF2, FBN2, HSP90AA1, IDH2, IFNG, INSR, MEIS2, MDH1, MAP1A, SMAD4, LTB, LAMP1, ISG20, ING1, IGF1, IMPA1, CXCL8, IL6, IL2RA, IL1B, IL1A, CCN1, FASN, ETV5, ERN1, ALDH7A1, CACNA1F, C5AR1, C3, C1QBP, BSG, BMP4, BCL2, ARRB2, CANX, ARR3, ABCC6, APOE, APOB, AMFR, ADH7, ABO, CACNA1S, CCT, ERBB2, CYBB, EGF, E2F1, DUSP6, DNMT3A, CFD, ACE, CYLD, CTNNB1, CD44, MAPK14, CRYAB, CRK, CP, CORD1, COL2A1, CD74, RAB8A, MSR1, SH3BP4, CYTB, SYNJ1, FGF18, HSD17B6, DGKE, BRAP, SMC1A, USP11, AIMP2, PAX8, ZNF132, ZFP36, USH1E, TSC1, TP53, TNF, TMPRSS2, TSPAN7, SMC3, ARHGEF2, CRLF1, AKT3, TMED3, SIRT1, ARC, MAPRE3, ARPP21, AHSA1, PPIH, HEPH, SNAP29, PLEKHM1, PHYHIP, HDAC4, KNTC1, EIF2AK3, GRAP2, EFTUD2, TIMP2, TIMP1, DYNLT3, PKNOX1, HTRA1, PRNP, MAPK1, PRKCG, POLG, PMM2, PLAU, PIM1, RAC1, PGF, CFP, PDGFRB, NPTX2, NFE2L2, NAGLU, MYC, ALDH18A1, RASGRF1, ELOVL4, SFTPD, STATH, SOS1, SOD1, SNRPB, SNCA, SLC2A1, SGSH, SFRP5, RBP1, SEC14L1, CX3CL1, CCL2, S100A6, RPS6KB1, RPS6, RCVRN, H3P22

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A number sign (#) is used with this entry because of evidence that retinitis pigmentosa-56 (RP56) is caused by homozygous mutation in the gene encoding interphotoreceptor matrix proteoglycan-2 (IMPG2; 607056) on chromosome 3q12.

For a general phenotypic description and a discussion of genetic heterogeneity of retinitis pigmentosa (RP), see 268000.

Clinical Features

Bandah-Rozenfeld et al. (2010) examined 12 patients from 7 families with retinal disease and mutations in the IMPG2 gene. In general, affected individuals with IMPG2 mutations displayed typical symptoms and signs of RP, including night blindness, visual field loss, optic disc pallor, attenuated vessels, and bone-spicule-like pigmentation. In 11 of the 12 patients, lens abnormalities were observed: 7 had posterior subcapsular cataracts, 2 had mild cortical cataracts, 1 had pseudophakia, and 1 patient, who was diagnosed with mild maculopathy (see VMD5, 616152) rather than RP, had mild nuclear sclerosis.

Mapping

Using whole-genome SNP analysis of 381 patients with RP and 193 patients with Leber congenital amaurosis (LCA; see 204000) of Israeli, Palestinian, and European origin, Bandah-Rozenfeld et al. (2010) identified 2 RP families in which the affected sibs shared a large homozygous region at chromosome 3q12. The 7.2-Mb overlapping interval, flanked by rs12330531 and rs326333, contained 30 annotated genes, including the IMPG2 gene.

Molecular Genetics

In an Iraqi Jewish family and a Dutch family, both segregating autosomal recessive RP mapping to chromosome 3q12, Bandah-Rozenfeld et al. (2010) analyzed the IMPG2 gene and identified homozygosity for a nonsense mutation (S212X; 607056.0001) and a 1.8-kb genomic deletion (607056.0002), respectively. Analysis of IMPG2 in 10 additional families segregating autosomal recessive retinal disease mapping to chromosome 3q12 revealed 5 additional mutations (see, e.g., 607056.0003-607056.0004), including a missense mutation (F124L; 607056.0005) in a patient (family MOL0732) who had only mild maculopathy. The latter patient's phenotype was designated as representing 'a case of autosomal recessive macular vitelliform dystrophy' by Meunier et al. (2014), who identified a heterozygous C1077F mutation (607056.0006) in a father and son with vitelliform macular dystrophy (VMD5; 616152).