Oxidative stress and frailty: A systematic review and synthesis of the best evidence

Nicola Veronese, Patricia Schofield, Brisa S. Fernandes, Pinar Soysal, Nicola Veronese, Andre F. Carvalho, Brendon Stubbs, Marco Solmi, Ahmet Turan Isik

Risultato della ricerca: Articlepeer review

82 Citazioni (Scopus)

Abstract

Objective Oxidative stress (OS) is associated with accelerated aging. Previous studies have suggested a possible relationship between OS and frailty but this association remains unclear. We conducted a systematic review to investigate potential interactions between OS and frailty. Methods A systematic literature search of original reports providing data on ‘OS and antioxidant’ parameters and frailty was carried out across major electronic databases from inception until May 2016. Cross-sectional/case control and longitudinal studies reporting data on the association between frailty and anti-oxidants-OS biomarkers were considered for inclusion. Results were summarized with a synthesis based on the best evidence. Results From 1856 hits, 8 studies (cross-sectional/case control) were included (N = 6349; mean age of 75 ± 12 years; 56.4% females). Overall, there were 588 (=9.3%) frail, 3036 pre-frail (=47.8%), 40 (=0.6%) pre-frail/robust, and 2685 (=42.3%) robust subjects. Six cross-sectional/case control studies demonstrated that frailty was associated with an increase in peripheral OS biomarkers, including lipoprotein phospholipase A2 (1 study), isoprostanes (2 studies), malonaldehyde (2 studies), 8-hydroxy-20-deoxyguanosine (2 studies), derivate of reactive oxygen metabolites (2 studies), oxidized glutathione/glutathione (1 study), 4-hydroxy-2,3-nonenal (1 study), and protein carbonylation levels (1 study). In addition, preliminary evidence points to lower anti-oxidant parameters (vitamin C, E, α-tocopherol, biological anti-oxidant potential, total thiol levels) in frailty. Conclusion Frailty and pre-frailty appear to be associated with higher OS and possibly lower anti-oxidant parameters. However, due to the cross-sectional design, it is not possible to disentangle the directionality of the relationships observed. Thus, future high-quality and in particular longitudinal research is required to confirm or refute these relationships and to further elucidate pathophysiological mechanisms. © 2017 Elsevier B.V.
Lingua originaleEnglish
pagine (da-a)66-72
Numero di pagine7
RivistaMaturitas
Volume99
Stato di pubblicazionePublished - 2017

All Science Journal Classification (ASJC) codes

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  • Obstetrics and Gynaecology

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