Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
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SHR Neuro Krebs Kardio Lipid Stoffw Microb
Russ, M; Jauk, S; Wintersteiger, R; Gesslbauer, B; Greilberger, J; Andra, M; Ortner, A.
Stabilization of Angiotensin-(1-7) in Cardioprotective Solutions
INT J PEPT RES THER. 2019; 25(4): 1271-1278.
Doi: 10.1007/s10989-018-9773-y
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- Co-Autor*innen der Med Uni Graz
- Andrä Michaela
- Greilberger Joachim
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- Abstract:
- Angiotensin-(1-7) (Ang 1-7) has been previously studied in combination with an antioxidant containing preparation as a cardioprotective reperfusion solution. In this study a stability improvement of aqueous Ang 1-7 solutions was observed. However, no data was provided on the responsibilities and causes of the noticed stability enhancement. Therefore, the influence of pH and pharmaceutical additives as well as the effect of the single specific agents present in the antioxidant preparation such as alpha-ketoglutaric acid (alpha-KG), 5-hydroxymethylfurfural (5-HMF), N-acetyl-seleno-l-methionine (NASeLM) and N-acetyl-l-methionine (NALM) on the stability was evaluated. Analyses were performed by an HPLC method with fluorescence detection. Crucial instability was found in a pH range of 5.0-7.5 without addition of the antioxidative mixture. Zetasizing confirmed the presence of microparticles and MS studies showed no degradation products within 25 days. 5-HMF was identified as main component for stability enhancement of Ang 1-7 solution. By adding this substance the stability of the cardioprotective peptide solution can be prolonged and appears as a promising approach for transplant purposes.
- Find related publications in this database (Keywords)
- 5-Hydroxymethylfurfural
- Angiotensin-(1-7)
- Peptide stabilization
- HPLC
- MS
- Fluorescence detection