Albinism
Albinism - Related Videos
13:26
Measuring Connectivity in the Primary Visual Pathway in Human Albinism Using Diffusion Tensor Imaging and Tractography
0 Views •
Cited by 5 •
2016
This manuscript describes deterministic and probabilistic algorithms for white matter (WM) reconstruction, used to examine differences in optic radiation (OR) connectivity between albinism and controls. Although probabilistic tractography follows the true course of nerve fibers more closely, deterministic tractography was run to compare the reliability and reproducibility of both techniques.
07:42
Genome Editing in Astyanax mexicanus Using Transcription Activator-like Effector Nucleases (TALENs)
0 Views •
Cited by 21 •
2016
Gene-targeting mutagenesis is now possible in a wide range of organisms using genome editing techniques. Here, we demonstrate a protocol for targeted gene mutagenesis using transcription activator like effector nucleases (TALENs) in Astyanax mexicanus, a species of fish that includes surface fish and cavefish.
FAQs
TYR variants can disrupt an enzyme or cellular pathway required for melanin biosynthesis in melanocytes. When this pathway is reduced or interrupted, these pigment-producing cells make less melanin, producing hypopigmentation. This example shows how examining a single gene and its biochemical role can connect a molecular change with visible traits in skin and eyes.
Reduced melanin production can coincide with altered eye development, so the consequences extend beyond visible pigmentation. This link is biologically important because it connects melanocyte-related pathways with formation or function of the visual system. Studying that relationship helps explain why affected individuals may experience impaired vision and why evaluation must consider ocular findings as well as pigmentation.
Albinism illustrates how different genetic variants within melanin-related genes or pathways can produce related pigmentation changes. Focusing only on the visible trait can therefore miss the underlying molecular cause. In biology, comparing the genes and cellular steps involved helps researchers connect genotype, pathway disruption, and effects in multiple tissues without treating pigmentation as an isolated characteristic.
Genetic diagnosis can investigate whether variants in genes involved in melanin biosynthesis explain the observed condition. The result can support genetic counseling by linking clinical findings with an inherited molecular cause. This approach is useful because it shifts assessment from appearance alone toward evidence about the relevant pathway, while also placing associated eye findings in a broader biological context.
Sun-protection strategies are relevant because melanin normally helps protect skin from ultraviolet radiation. Reduced or absent production weakens that pigment-associated protection, making prevention an important part of care. In practice, biology provides the rationale for emphasizing protection from ultraviolet exposure alongside assessment of pigmentation and other effects of the altered pathway.
Ophthalmic care addresses the visual consequences associated with altered eye development. Its relevance extends beyond the eyes because ocular findings provide evidence that the affected biology operates across more than one tissue. Together with genetic diagnosis and counseling, ophthalmic assessment connects molecular pathway changes to functional outcomes, making albinism useful for studying gene regulation and visual-system development.