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Oxidative stress causes plasma protein modification.
Indian Journal of Experimental Biology
|February 14, 2015
Summary
Oxidative stress from Chloramine-T significantly reduced total plasma protein levels and increased protein carbonyls in healthy volunteers. This indicates protein modifications impact function, influenced by the stress agent and experimental methods.
Area of Science:
- Biochemistry
- Oxidative Stress Research
Background:
- Oxidative systems can alter biological molecules.
- Plasma proteins are susceptible to modifications by free radicals.
Purpose of the Study:
- To investigate the impact of oxidative stress on plasma proteins.
- To evaluate the effects of Chloramine-T on protein integrity and function.
Main Methods:
- Plasma specimens from healthy volunteers were treated with Chloramine-T.
- Spectrophotometry was used for total protein and plasma carbonyl assays.
- SDS-PAGE, electrophoresis, and HPLC were employed to assess protein modifications and fragmentation.
Main Results:
- Oxidized plasma showed significantly lower total protein levels (4.08 ± 0.12 g/dL) compared to controls (7.86 ± 0.03 g/dL).
- Plasma carbonyl levels were markedly higher in oxidized samples (1.94 ± 0.38 nmol/mg protein) versus controls (0.03 ± 0.01 nmol/mg protein).
- Protein fragmentation was observed in oxidized plasma, while protein and lipid levels remained largely unaffected.
Conclusions:
- Chloramine-T-induced oxidative stress causes significant plasma protein modifications, including fragmentation.
- These protein alterations likely affect protein functions.
- The extent of protein modification is dependent on the stress agent, treatment duration, and analytical methodology.
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