Insulin synthesis in chick embryo retinas during development

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Abstract

Retinas of chick embryos contain insulin and further, are capable of synthesizing it, as demonstrated by incubating retinas at different ages (7th-18th day) with [3H]leucine. The synthesized radioactive insulin was isolated and assayed by means of a HPLC procedure. The synthesis of insulin was found to be highest in the youngest retinas studied (day 7), afterwards it declined with age except for an increment found at 14-15 day. Explants of chick embryo retinas, cultured in vitro, rapidly degraded insulin. Nevertheless, the content of immunoreactive insulin in retinal explants diminished slowly with the age of culture, so that, after 8 days of incubation, it was about 60% of the content found in the retinas at the beginning of incubation. This was proof that cultured explants are capable of efficiently synthesizing insulin. The synthesized [3H]insulin was released from explants into the medium. This was evident also after 6-8 days in culture.
Lingua originaleEnglish
pagine (da-a)821-825
Numero di pagine5
RivistaNeurochemical Research
Volume19
Stato di pubblicazionePublished - 1994

All Science Journal Classification (ASJC) codes

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  • ???subjectarea.asjc.2800.2804???

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