Persistence of the benefit of an antioxidant therapy in children and teenagers with Down syndrome.
Antioxidant pills lower cell stress in Down youth yet bring no behavior gains, so keep focusing on skill teaching.
01Research in Context
What this study did
Doctors gave the kids and teens with Down syndrome antioxidant pills every day for six months. They drew blood before, during, and six months after the pills stopped to check oxidative stress markers. No control group was used.
What they found
Oxidative damage dropped while the kids took the pills. Surprisingly, some benefits stayed even after they quit the supplement. The study did not measure behavior or learning gains.
How this fits with other research
Stancliffe et al. (2007) also tracked oxidative enzymes in Down teens, but used exercise instead of pills and saw only a weak link with waist size. Their result looks different, yet both agree that changing one lifestyle factor nudges oxidative markers.
Micai et al. (2021) meta-analysis shows Down youth have small inhibition problems compared with mental-age peers. Benedetti’s pill study never tested inhibition, so the two pieces fit side-by-side: physiology can improve while cognitive control stays unchanged.
Andrews et al. (2024) ran a five-session parent-training program and saw real behavior gains. Together the papers remind us that biochemical fixes and behavioral coaching target different systems; you can have one without the other.
Why it matters
If you work with Down syndrome clients, know that antioxidant therapy might help internal cell stress but will not replace skill teaching. Keep running your usual behavior programs. Share the blood data with families and pediatricians so medical and behavioral plans stay aligned.
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02At a glance
03Original abstract
This study examined the effect of an antioxidant intervention in biomarkers of inflammation and oxidative stress (OS) in the blood of Down syndrome (DS) children and teenagers during four different stages. A control group was composed by healthy children (n=18), assessed once, and a Down group composed by DS patients (n=21) assessed at the basal period (t0), as well as after 6 months of antioxidant supplementation (t1), after 12 months (after interruption of the antioxidant intervention for 6 months) (t2), and again after further 6 months of antioxidant supplementation (t3). Biomarkers of inflammation (myeloperoxidase activity - MPO and levels of IL-1β and TNF-α) and OS (thiobarbituric acid reactive substances - TBARS, protein carbonyls - PC), reduced glutathione (GSH), uric acid (UA) and vitamin E levels, as well as antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GPx), glutathione reductase (GR), glutathione-S-transferase (GST) and gamma-glutamyltransferase (GGT) activities, were measured after each period. After the antioxidant supplementation, the activities of SOD, CAT, GPx, GR, GGT and MPO were downregulated, while TBARS contents were strongly decreased, the contents of GSH and vitamin E were significantly increased, and no changes in G6PD and GST activity as well as in UA and PC levels were detected. After the interruption of the antioxidant therapy for 6 months, DS patients showed elevated GPx and GGT activities and also elevated UA and TBARS levels. No changes in SOD, CAT, GR, GST, G6PD and MPO activities as well as in GSH, vitamin E, PC, TNF-α and IL-1β levels were detected. The results showed that the antioxidant intervention persistently attenuated the systemic oxidative damage in DS patients even after a relatively long period of cessation of the antioxidant intervention.
Research in developmental disabilities, 2015 · doi:10.1016/j.ridd.2015.07.010