October 1986
Volume 27, Issue 10
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Articles  |   October 1986
The accumulation of myoinositol and rubidium ions in galactose-exposed rat lens.
Investigative Ophthalmology & Visual Science October 1986, Vol.27, 1522-1526. doi:
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      T Kawaba, H M Cheng, J H Kinoshita; The accumulation of myoinositol and rubidium ions in galactose-exposed rat lens.. Invest. Ophthalmol. Vis. Sci. 1986;27(10):1522-1526.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

When rat lens is incubated in 30 mM galactose overnight, the extent of accumulation of rubidium ions (Rb) and myoinositol (MI) are affected, as well as the Na-K ATPase activity. Rb accumulation and Na-K ATPase activity are only slightly affected compared to the dramatic drop in MI accumulation. These changes are completely abolished by sorbinil, which blocks polyol formation, or by rendering the galactose medium hypertonic to offset the osmotic effect of polyol formation. On the other hand, the addition of excess MI to the galactose medium had no effect on correcting these changes. The results obtained are consistent with the polyol-osmotic theory of sugar cataract formation.

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