Human equivalent doses of L-DOPA rescues retinal morphology and visual function in a murine model of albinism.

Human equivalent doses of L-DOPA rescues retinal morphology and visual function in a murine model of albinism.
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DOI:
10.1038/s41598-023-44373-3
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发表时间:
2023-10-11
期刊:
影响因子:
4.6
通讯作者:
Lee, Helena
Lee, Helena
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Sanchez-Bretano, Aida;Keeling, Eloise;Scott, Jennifer A.;Lynn, Savannah A.;Soundara-Pandi, Sudha Priya;Macdonald, Sarah L.;Newall, Tutte;Griffiths, Helen;Lotery, Andrew J.;Ratnayaka, J. Arjuna;Self, Jay E.;Lee, Helena

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l-多巴在发育中的白化病眼中缺乏,导致视网膜发育异常和视力损害。出生后持续的视网膜发育也已在发育中的白化病眼中得到证实,这为人类提供了一个潜在的治疗窗口。为了研究在神经可塑性的关键出生后时期期间施用人类等效剂量的l-DOPA/卡比多巴是否可以挽救视觉功能,OCA C57 BL/6 J-c2 J OCA 1小鼠用3种不同剂量的口服l-DOPA/卡比多巴从出生后15至43天的年龄(PNA)治疗28天的疗程,并持续3种不同的治疗长度,以确定最佳剂量和治疗长度。在4、5、6、12和16周PNA时测量视觉电生理、敏锐度和视网膜形态,并与未处理的C57 BL/6 J(WT)和OCA 1小鼠进行比较。还进行了PEDF、β III-微管蛋白和突触融合蛋白-3表达的定量。我们的数据显示,与WT小鼠相比,未治疗的OCA 1小鼠的视网膜形态受损,视网膜功能下降,视力降低。当用更高剂量的l-DOPA/卡比多巴治疗时,这些变化减少或消除。我们的研究结果表明,在视网膜神经可塑性的出生后关键时期,以人类等效剂量口服l-多巴/卡比多巴补充剂可以通过PEDF上调和调节视网膜突触发生来挽救视觉视网膜形态和视网膜功能,为开发白化病患者的有效治疗方法提供了进一步的步骤。
l-DOPA is deficient in the developing albino eye, resulting in abnormalities of retinal development and visual impairment. Ongoing retinal development after birth has also been demonstrated in the developing albino eye offering a potential therapeutic window in humans. To study whether human equivalent doses of l-DOPA/Carbidopa administered during the crucial postnatal period of neuroplasticity can rescue visual function, OCA C57BL/6 J-c2J OCA1 mice were treated with a 28-day course of oral l-DOPA/Carbidopa at 3 different doses from 15 to 43 days postnatal age (PNA) and for 3 different lengths of treatment, to identify optimum dosage and treatment length. Visual electrophysiology, acuity, and retinal morphology were measured at 4, 5, 6, 12 and 16 weeks PNA and compared to untreated C57BL/6 J (WT) and OCA1 mice. Quantification of PEDF, βIII-tubulin and syntaxin-3 expression was also performed. Our data showed impaired retinal morphology, decreased retinal function and lower visual acuity in untreated OCA1 mice compared to WT mice. These changes were diminished or eliminated when treated with higher doses of l-DOPA/Carbidopa. Our results demonstrate that oral l-DOPA/Carbidopa supplementation at human equivalent doses during the postnatal critical period of retinal neuroplasticity can rescue visual retinal morphology and retinal function, via PEDF upregulation and modulation of retinal synaptogenesis, providing a further step towards developing an effective treatment for albinism patients.
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