Zusammenfassung
Typ-2-Diabetes mellitus (T2DM) ist mit einem erhöhten Aufkommen freier Radikale assoziiert, die eine entscheidende Rolle in der Manifestation des Diabetes und in der Progression diabetischer Komplikationen spielen. Peroxiredoxine sind bedeutsame Komponenten der erythrozytären antioxidativen Abwehr. Daher verglichen wir die Gehalte an Peroxiredoxin-Isoformen (PRDX1-6 immunohistochemische Färbungen) in den Erythrozyten von übergewichtigen/adipösen T2DM-Männern (n = 6) und von BMI-ähnlichen nicht-diabetischen männlichen Kontrollpersonen (n = 6). Nur die erythrozytären Proteine PRDX1 und PRDX2 konnten immunohistochemisch detektiert werden. PRDX1 war signifikant erhöht bei T2DM-Männern im Vergleich zu den Kontrollpersonen (+95,9 %, P ≤ 0,05). Desweiteren haben wir den Einfluss eines 3-monatigen Ausdauer-Trainingsprogrammes (3mal wöchentlich, Fahrradfahren bei 75 % der maximalen Herzfrequenz) auf die Gehalte an PRDX1 und PRDX2 in den Erythrozyten übergewichtiger/adipöser T2DM-Männer (n = 11) untersucht. Das Training erhöhte basales PRDX2 signifikant (+96 %, P ≤ 0,05). Die Hochregulierung des Peroxiredoxin-Systems könnte dabei helfen, freie Radikale in den Erythrozyten von T2DM-Patienten zu puffern.
Summary
Type 2 diabetes mellitus (T2DM) is associated with an increased release of free radicals which play an important role in the manifestation of diabetes and in the progression of diabetic complications. Peroxiredoxins are thought to be essential components of the erythrocyte antioxidative defense. Therefore, we compared peroxiredoxin isoform contents (PRDX1-6 immunohistochemial stainings) in the erythrocytes of overweight/obese T2DM men (n = 6) and of BMI-matched non-diabetic male control subjects (n = 6). Only erythrocyte PRDX1 and PRDX2 proteins were detectable using immunohistochemical methods. PRDX1 was significantly increased in T2DM men relative to control subjects (+95.9%, P ≤ 0.05). Furthermore, we studied the influence of a 3-month endurance training program (3 times a week, cycling at 75% maximal heart rate) on erythrocyte PRDX1 and PRDX2 contents in overweight/obese T2DM men (n = 11). Training significantly increased PRDX2 at rest (+96%, P ≤ 0.05). The up-regulation of the peroxiredoxin system may help counteract free radicals in the erythrocytes of T2DM patients.
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Moghaddam, D., Heber, A., Capin, D. et al. Training increases peroxiredoxin 2 contents in the erythrocytes of overweight/obese men suffering from type 2 diabetes. Wien Med Wochenschr 161, 511–518 (2011). https://doi.org/10.1007/s10354-011-0037-0
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DOI: https://doi.org/10.1007/s10354-011-0037-0