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Correlation of serum complement factor 5a level with inflammatory response and cognitive function in patients with Alzheimer’s disease of different severity

BACKGROUND: Alzheimer’s disease (AD) is a common cause of dementia. Serum complement factor 5a (C5a) is exceedingly implicated in AD. We explored the role of C5a levels in AD patients of different severity. METHODS: Mild, moderate, and severe AD patients, and healthy controls were included. C5a and...

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Autores principales: Li, Zhilian, Wu, Huifang, Luo, Yi, Tan, Xianpei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10483705/
https://www.ncbi.nlm.nih.gov/pubmed/37679689
http://dx.doi.org/10.1186/s12883-023-03256-w
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author Li, Zhilian
Wu, Huifang
Luo, Yi
Tan, Xianpei
author_facet Li, Zhilian
Wu, Huifang
Luo, Yi
Tan, Xianpei
author_sort Li, Zhilian
collection PubMed
description BACKGROUND: Alzheimer’s disease (AD) is a common cause of dementia. Serum complement factor 5a (C5a) is exceedingly implicated in AD. We explored the role of C5a levels in AD patients of different severity. METHODS: Mild, moderate, and severe AD patients, and healthy controls were included. C5a and pro-inflammatory factor (TNF-α, IL-1β, IL-6, CRP) levels were assessed by ELISA, and cognitive function was evaluated by Mini-Mental state examination (MMSE) score. The correlations between C5a, inflammatory factor levels, MMSE score, and plasma Aβ42/Aβ40 ratio were analyzed by Pearson tests. Independent risk factors for AD aggravation were assessed by logistic multivariate regression analysis. According to the cut-off value of receiver operating characteristic (ROC) curve analysis of C5a level, AD patients were assigned into low/high expression groups, and severe AD incidence was compared. Severe AD cumulative incidence was analyzed by Kaplan-Meier curve. RESULTS: Serum C5a, TNF-α, IL-1β, IL-6 and CRP levels were raised, and MMSE score was lowered in AD. Serum C5a, TNF-α, IL-1β, IL-6 and CRP levels in severe AD patients were higher than those in mild/moderate AD patients, but there were no significant differences in these cytokines between moderate and mild AD groups. The MMSE score of severe AD patients was lower than that of mild/moderate AD patients. Serum C5a level was positively correlated with serum TNF-α, IL-1β, IL-6, and CRP levels, and negatively correlated with MMSE score, with no obvious correlation with plasma Aβ42/Aβ40 ratio. Serum C5a level was one of the independent risk factors for AD aggravation. The occurrence of severe AD might be related to an increase in serum C5a level. CONCLUSION: Serum C5a level increased with AD severity, and its expression was positively correlated with serum pro-inflammatory factor levels, and negatively correlated with cognitive function.
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spelling pubmed-104837052023-09-08 Correlation of serum complement factor 5a level with inflammatory response and cognitive function in patients with Alzheimer’s disease of different severity Li, Zhilian Wu, Huifang Luo, Yi Tan, Xianpei BMC Neurol Research BACKGROUND: Alzheimer’s disease (AD) is a common cause of dementia. Serum complement factor 5a (C5a) is exceedingly implicated in AD. We explored the role of C5a levels in AD patients of different severity. METHODS: Mild, moderate, and severe AD patients, and healthy controls were included. C5a and pro-inflammatory factor (TNF-α, IL-1β, IL-6, CRP) levels were assessed by ELISA, and cognitive function was evaluated by Mini-Mental state examination (MMSE) score. The correlations between C5a, inflammatory factor levels, MMSE score, and plasma Aβ42/Aβ40 ratio were analyzed by Pearson tests. Independent risk factors for AD aggravation were assessed by logistic multivariate regression analysis. According to the cut-off value of receiver operating characteristic (ROC) curve analysis of C5a level, AD patients were assigned into low/high expression groups, and severe AD incidence was compared. Severe AD cumulative incidence was analyzed by Kaplan-Meier curve. RESULTS: Serum C5a, TNF-α, IL-1β, IL-6 and CRP levels were raised, and MMSE score was lowered in AD. Serum C5a, TNF-α, IL-1β, IL-6 and CRP levels in severe AD patients were higher than those in mild/moderate AD patients, but there were no significant differences in these cytokines between moderate and mild AD groups. The MMSE score of severe AD patients was lower than that of mild/moderate AD patients. Serum C5a level was positively correlated with serum TNF-α, IL-1β, IL-6, and CRP levels, and negatively correlated with MMSE score, with no obvious correlation with plasma Aβ42/Aβ40 ratio. Serum C5a level was one of the independent risk factors for AD aggravation. The occurrence of severe AD might be related to an increase in serum C5a level. CONCLUSION: Serum C5a level increased with AD severity, and its expression was positively correlated with serum pro-inflammatory factor levels, and negatively correlated with cognitive function. BioMed Central 2023-09-07 /pmc/articles/PMC10483705/ /pubmed/37679689 http://dx.doi.org/10.1186/s12883-023-03256-w Text en © The Author(s) 2023, corrected publication 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research
Li, Zhilian
Wu, Huifang
Luo, Yi
Tan, Xianpei
Correlation of serum complement factor 5a level with inflammatory response and cognitive function in patients with Alzheimer’s disease of different severity
title Correlation of serum complement factor 5a level with inflammatory response and cognitive function in patients with Alzheimer’s disease of different severity
title_full Correlation of serum complement factor 5a level with inflammatory response and cognitive function in patients with Alzheimer’s disease of different severity
title_fullStr Correlation of serum complement factor 5a level with inflammatory response and cognitive function in patients with Alzheimer’s disease of different severity
title_full_unstemmed Correlation of serum complement factor 5a level with inflammatory response and cognitive function in patients with Alzheimer’s disease of different severity
title_short Correlation of serum complement factor 5a level with inflammatory response and cognitive function in patients with Alzheimer’s disease of different severity
title_sort correlation of serum complement factor 5a level with inflammatory response and cognitive function in patients with alzheimer’s disease of different severity
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10483705/
https://www.ncbi.nlm.nih.gov/pubmed/37679689
http://dx.doi.org/10.1186/s12883-023-03256-w
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