Genetic modulation of the iris transillumination defect: a systems genetics analysis using the expanded family of BXD glaucoma strains.

Abstract:

:We investigated the contributions of Tyrp1 and Gpnmb to the iris transillumination defect (TID) in five age cohorts of BXD mice. Using systems genetics, we also evaluated the role of other known pigmentation genes (PGs). Mapping studies indicate that Tyrp1 contributes to the phenotype at all ages, yet the TID maps to Gpnmb only in the oldest cohort. Composite interval mapping reveals secondary loci viz. Oca2, Myo5a, Prkcz, and Zbtb20 that modulate the phenotype in the age groups up to 10-13 months. The contributions of Tyrp1 and Gpnmb were highly significant in all age cohorts. Moreover, in young mice, all six gene candidates had substantial interactions in our model. Our model accounted for 71-88% of the explained variance of the TID phenotype across the age bins. These results demonstrate that along with Tyrp1 and Gpnmb, Oca2, Myo5a, Prkcz, and Zbtb20 modulate the TID in an age-dependent manner.

authors

Swaminathan S,Lu H,Williams RW,Lu L,Jablonski MM

doi

10.1111/pcmr.12106

subject

Has Abstract

pub_date

2013-07-01 00:00:00

pages

487-98

issue

4

eissn

1755-1471

issn

1755-148X

journal_volume

26

pub_type

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