Retinal bipolar cell multi-characteristic opsin (MCO-010) (MCO-010)

Retinal bipolar cell multi-characteristic opsin (MCO‑010) is a synthetic light-sensitive protein designed for optogenetic restoration of vision in patients with advanced inherited retinal degenerations such as retinitis pigmentosa. MCO‑010 is engineered from three non-mammalian proteins to create a broadband opsin that responds to ambient visible light. It is delivered using an adeno-associated virus serotype 2 (AAV2) vector under the control of an ON-bipolar cell-specific promoter, ensuring targeted expression in surviving second-order neurons after photoreceptor loss[4][3]. This approach enables these inner retinal neurons—normally not directly photosensitive—to respond to light and transmit visual information downstream. Clinical studies have shown that intravitreal injection of AAV2-MCO‑010 can restore measurable visual function—including improved acuity and mobility—in legally blind patients with severe photoreceptor degeneration. The treatment has demonstrated good tolerability without serious adverse events; mild inflammatory responses have been managed successfully with steroids[6]. Preclinical models also show preservation of remaining retina structure and function following treatment[3]. This target is not a naturally occurring receptor or enzyme but rather represents the therapeutic introduction of a synthetic photosensitive molecule into human ON-bipolar cells for disease modification and functional restoration. Therefore, while it functions as a therapeutic target within the context of gene therapy for blindness, it does not fit traditional molecular classification schemes used for endogenous drug targets. Note on correctness: The original query refers broadly to "Retinal bipolar cell light sensitivity restoration via synthetic multi-characteristic opsin expression," which describes an approach rather than a single canonical molecule/receptor name. The most accurate canonical form based on current literature would be "Retinal bipolar cell multi-characteristic opsin (MCO‑010)" or simply "Multi-characteristic opsin" when referring specifically to this therapeutic entity[4][2].

Other names

Multi-characteristic opsinSynthetic multi-characteristic opsinSynthopsin-MCO-010Sonpiretigene isteparvovec

Photosensitization of ON-bipolar cells via expression of a synthetic, broad-spectrum light-sensitive cation channel protein delivered by AAV2 vector[2][4][6].