Effects of Astaxanthin Supplementation on Oxidative Stress

2020 ◽  
Vol 90 (1-2) ◽  
pp. 179-194 ◽  
Author(s):  
Di Wu ◽  
Hao Xu ◽  
Jinyao Chen ◽  
Lishi Zhang
Keyword(s):  
Systematic Review ◽  
Superoxide Dismutase ◽  
Antioxidant Capacity ◽  
Subgroup Analysis ◽  
Total Antioxidant Capacity ◽  
Meta Analysis ◽  
Antioxidant Effect ◽  
High Dose ◽  
Standard Mean Difference ◽  
Total Antioxidant

Abstract. A systematic review and meta-analysis was conducted in six databases from 1948 to 2015 to assess the antioxidant activity of astaxanthin in humans. Nine randomized controlled trials were included in the systematic review. Results of meta-analysis revealed a borderline significant antioxidant effect of astaxanthin between the intervention and control groups, with a malondialdehyde-lowering effect for lipid peroxidation ( p = 0.050). However, the data included here are insufficient. When compared with the baseline in intervention groups, the meta-analysis suggested that astaxanthin supplements significantly decreased plasma malondialdehyde {Standard mean difference (SMD) −1.32 μmol/L [95% CI −1.92, −0.72]; p < 0.0001} and isoprostane (SMD −3.10 ng/mL [95% CI −4.69, −1.51]; p < 0.0001). However, they increased superoxide dismutase (SMD 1.57 U/mL [95% CI 0.57, 2.56]; p = 0.002) and total antioxidant capacity (SMD 0.77 mmol 95% CI [0.12, 1.43]; p = 0.018). For dosage subgroup analysis, high dose (≥20 mg/day) of astaxanthin showed significant antioxidant effect (on total antioxidant capacity, isoprostane, and superoxide dismutase, p < 0.05). However, low dose (<20 mg/day) showed no significant effect ( p > 0.05). Further duration subgroup analysis indicated that astaxanthin showed antioxidant effect after a 3-week intervention ( p < 0.001), whereas this effect was not observed after a 12-week or 3-month intervention (on isoprostane and superoxide dismutase, p > 0.05). This review suggested that the antioxidant effect of astaxanthin on humans is unclear.

The effect of Nigella sativa on oxidative stress and inflammatory biomarkers: a systematic review and meta-analysis

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sanaz Malekian ◽  
Nafiseh Ghassab-Abdollahi ◽  
Mojgan Mirghafourvand ◽  
Azizeh Farshbaf-Khalili
Keyword(s):  
Oxidative Stress ◽  
Systematic Review ◽  
Superoxide Dismutase ◽  
Total Antioxidant Capacity ◽  
Nigella Sativa ◽  
Meta Analysis ◽  
Inflammatory Biomarkers ◽  
Controlled Trials ◽  
Tnf Α ◽  
Total Antioxidant

Abstract Objectives The present systematic review of literature was conducted to study the effect of Nigella sativa (N.S) on oxidative stress and inflammatory biomarkers. Content Different online databases such as Cochrane Central Register of Controlled Trials, MEDLINE (PubMed), Scopus, Web of Sciences, EMBASE, and Clininaltrial.gov for English articles and national databases of SID, Magiran, Irandoc, and Iranmedex for Persian articles, which were published until March; 2019 were scrutinized. All Randomised Controlled Trials (RCTs) and quasi-experimental studies that aimed to compare the impact of N.S along, with placebo or without supplementation, on inflammatory factors and oxidative stress were entered in the present study. Summary Finally, 11 RCTs covering 710 women and men, in total, were participated in the present meta-analysis. Significant differences were observed in Tumor Necrosis Factor alpha (TNF-α) (Weighted Mean Difference (WMD) =−2.15 pg/mL, 95% Confidence Interval (CI) =−3.22–−1.09, I2=32%; 5 trials with 262 participants) superoxide dismutase (WMD=63.79 µ/gHb, 95% CI=6.84–120.75, I2=0%; 2 trials, with 88 participants), and total antioxidant capacity (WMD=0.34 mmol/L, 95% CI=0.04 to 0.63, I2=94%; 5 trials with 232 participants). Nevertheless, there was no significant difference in high sensitivity C-reactive protein (WMD=−0.98 mg/L, 95% CI=−1.98–0.03, I2=78%; 5 trials with 267 participants), Interleukin 6 (IL-6) (WMD=−0.25 pg/mL, 95% CI=−0.65 to 0.16, I2=0%; 2 trials with 134 participants), and malondialdehyde (WMD=−0.95 nmol/mL, 95% CI=−1.97–0.08, I2=68%; 4 trials with 179 participants). Outlook Generally speaking, N.S probably results in the improvement of superoxide dismutase serum levels, TNF-α, and total antioxidant capacity. Thus, further studies are required to fully assess its impacts on all oxidative stress and inflammatory biomarkers.

Higher dietary total antioxidant capacity (TAC) reduces the risk of cardio-metabolic risk factors among adults: An updated systematic review and meta-analysis

2021 ◽  
pp. 1-15
Author(s):  
Mahdieh Abbasalizad Farhangi ◽  
Ali Mohammad-Rezaei
Keyword(s):  
Systematic Review ◽  
Blood Pressure ◽  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Observational Studies ◽  
Meta Analysis ◽  
Dietary Antioxidants ◽  
Total Antioxidant ◽  
Dietary Total Antioxidant Capacity

Abstract. Background: Numerous studies have revealed the protective role of dietary antioxidants against hypertension and diabetes. In the current systematic review and meta-analysis, we evaluated the possible role of dietary total antioxidant capacity (TAC) against metabolic parameters in the adult population. Methods: A literature search of authentic electronic resources including PubMed, Scopus, Web of Sciences, and Cochrane had been performed to retrieve the qualified observational studies that reported the mean plus/minus the SD for the parameter in subjects of the highest versus lowest dietary TAC categories up to July 2020. Results: Totally, the number of included studies was 13 for fasting blood sugar (FBS), 12 for systolic blood pressure (SBP), and 12 for diastolic blood pressure (DBP), with the participants’ number of 26349. The results of the current study showed that being at highest category of TAC significantly reduces serum FBS (WMD: −2.381; CI: −3.445, −1.316; P<0.001), SBP (WMD: −1.080; CI: −1.458, −0.701; P<0.001) and DBP (WMD: −0.854; CI: −1.655, −0.052; P<0.001), while no significant difference in the serum insulin, HOMA-IR values, prevalence of type 2 diabetes (T2DM) (P=0.37) and hypertension (HTN) (P=0.09) was observed. Subgroup analysis revealed the geographical location, dietary assessment tool, sample size, and gender as possible sources of heterogeneity. Conclusion: Higher intake of dietary TAC was associated with reduced SBP, DBP, and FBS in the current observational studies of this meta-analysis. These findings further confirm the clinical importance of dietary antioxidants in the prevention of different metabolic disorders.

Low-dose or no aspirin administration in acute-phase Kawasaki disease: a meta-analysis and systematic review

2020 ◽  
pp. archdischild-2019-318245
Author(s):  
Ming-Hsiu Chiang ◽  
Hsingjin Eugene Liu ◽  
Jinn-Li Wang
Keyword(s):  
Systematic Review ◽  
Kawasaki Disease ◽  
Acute Phase ◽  
Low Dose ◽  
Meta Analysis ◽  
Length Of Hospital Stay ◽  
High Dose ◽  
Cochrane Central Register ◽  
Factors Affecting ◽  
Standard Mean Difference

ObjectiveTo compare the efficacy of low-dose or no aspirin with conventional high-dose aspirin for the initial treatment in the acute-phase of Kawasaki disease (KD).DesignA meta-analysis and systematic review of randomised control trials and cohort studies.MethodsAll available articles that compared different dosage of aspirin in the acute-phase of KD published until 20 September 2019 were included from the databases of PubMed, Embase and Cochrane Central Register of Controlled Trials Central without language restrictions. Extracted data from eligible studies were reviewed by two authors independently and analysed by using RStudio software.ResultsNine cohorts with a total of 12 182 children were enrolled. We found that low-dose (3–5 mg/kg/day) or no aspirin in the acute-phase KD was associated with reducing the risk of coronary artery lesions (CALs, OR=0.81, 95% CI 0.69 to 0.95). No differences were observed in intravenous immunoglobulin resistance, length of hospital stay and fever days after admission (OR=1.35, 95% CI 0.91 to 1.98; standard mean difference (SMD)=0.17, 95% CI −1.07 to 1.4; SMD=0.3, 95% CI −1.51 to 2.11) in the low-dose/no aspirin subgroup compared with the high-dose (≥30 mg/kg/day) aspirin subgroup. We did not identify any potential factors affecting the homogeneity of CAL risk as well as clinical important effects in all included studies.ConclusionsPrescribing low-dose or no aspirin in the acute-phase of KD might be associated with a decreased incidence of CAL. However, additional well-designed prospective trials are required to support the theory.

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