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This study aimed to explore novel molecular mechanisms of disease for SCA2, based on the assessment of blood glucose homeostasis.\u00a0A case-control and correlational study was conducted in 79 normoglycemic Cuban patients with SCA2 and 83 sex- and age-matched control subjects during a fasting state. A subset of 20 patients with SCA2 and 19 control individuals underwent an oral glucose tolerance test (OGTT). Several indices for assessing blood glucose homeostasis, derived from the fasting state or the OGTT, were included in the study.\u00a0Fasting glucose levels showed a small increase, whereas the QUICKI index for insulin sensitivity was slightly decreased among patients. Markers of glucose homeostasis derived from the OGTT were no different between patients and controls. Fasting insulin levels, QUICKI, McAuley\u00b4s, HOMA2-%S, HOMA2-IR, and HOMA2-%\u03b2 indices showed weak to moderate correlations with markers of body composition. McAuley\u00b4s, TyG, HOMA2-IR, and HOMA2-%\u03b2 indices correlated with the age at onset, progression rate, or INAS count.\u00a0Patients with SCA2 with mild-to-moderate ataxia do not have any major alteration in blood glucose homeostasis. Markers of glucose homeostasis associate with body composition and have nominal modifying effects on disease severity and progression rate in patients with SCA2, with McAuley\u2019s index showing effects more consistently. Further studies are needed to describe the changes in blood glucose homeostasis in the different stages of disease, and to delve into its pathophysiological relevance.<\/jats:p>","DOI":"10.1007\/s12311-026-02076-1","type":"journal-article","created":{"date-parts":[[2026,8,29]],"date-time":"2026-08-29T03:17:40Z","timestamp":1787973460000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Blood Glucose Homeostasis is Preserved in Patients with Mild-to-moderate Spinocerebellar Ataxia Type 2"],"prefix":"10.1007","volume":"25","author":[{"given":"Ra\u00fal","family":"Aguilera-Rodr\u00edguez","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dennis","family":"Almaguer-Gotay","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amarilis","family":"\u00c1lvarez-Sosa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marilennis","family":"Anidos-Machado","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanelis","family":"Silva-Ricardo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dany","family":"Cuello-Almarales","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anneli\u00e9","family":"Estupi\u00f1\u00e1n-Rodr\u00edguez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luis E.","family":"Almaguer-Mederos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,8,29]]},"reference":[{"key":"2076_CR1","doi-asserted-by":"publisher","first-page":"587","DOI":"10.1016\/j.tins.2013.07.001","volume":"36","author":"P Mergenthaler","year":"2013","unstructured":"Mergenthaler P, Lindauer U, Dienel GA, Meisel A. 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