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Changes in Serum Amyloid A (SAA) and 8-OHdG in Patients with Senile Early Cognitive Impairment

Xiaohong Cao, Ping Chen

(Department of Senile Endocrinology, Sichuan Provincial People’s Hospital, Chengdu, Sichuan, China (mainland))

Med Sci Monit 2020; 26:e919586

DOI: 10.12659/MSM.919586


BACKGROUND: This study assessed variations in SAA and 8-OHdG in patients with senile early cognitive impairment (CI).
MATERIAL AND METHODS: The subjects were divided into 3 groups: 121 patients with mild cognitive impairment (MCI), 131 with Alzheimer’s disease (AD), and 100 healthy persons that underwent physical examinations during the same period (Control). These groups were evaluated by MMSE and MoCA, and the SAA and 8-OHdG levels in these groups were tested using ELISA sandwich technique.
RESULTS: The AD group had significantly higher TG and ApoB levels, followed by the MCI and Control groups, respectively (P<0.05). The MCI group had the highest HDL-C level significantly, while the Control group had the lowest (P<0.05). The Control (normal) group had significantly higher MoCA and MMSE scores, followed by the MCI group and the AD group (P<0.05). The Control (normal) group had significantly lower SAA and 8-OHdG levels, followed by the MCI group and the AD group (P<0.05). The MoCA and MMSE scores and serum 8-OHdG and serum SAA levels in the 3 groups were negatively correlated, but their SAA and 8-OHdG levels were positively correlated.
CONCLUSIONS: SAA and 8-OHdG in the MCI and AD groups were highly expressed but had an inverse correlation with cognitive function scores (hereafter referred to as CFs scores). They can also be applied as test indicators of MCI. We also detected an apparent link between SAA and 8-OHdG.

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