The proportions of IgG subclasses (G1, G2, G3 and G4) were quantified in sera from Alzheimer's disease (AD) patients, older Down's syndrome (DS) patients and age-matched controls. The levels of IgG1, IgG2 and IgG4 were normal in AD patients, but the proportions of IgG3 were significantly elevated in 9 of 20 (45%) patients (0.803 +/- 0.141 mg/ml; p less than 0.001) compared to the level found in age-matched controls (0.471 +/- 0.161 mg/ml; n = 10). The IgG3 level in the remaining 11 AD patients was slightly lower than the controls (0.385 +/- 0.104 vs. 0.471 +/- 0.161 mg/ml), but it did not reach statistical significance (p = 0.149). In contrast, patients with DS displayed imbalance of IgG2, IgG3, and IgG4 subclasses; they had significantly increased IgG3 but decreased IgG2 and IgG4 levels. The IgG1 level was within normal range. Moreover, a majority of AD sera (8 of 9) with elevated IgG3 concentration were positive for brain autoantibody. The remaining 11 AD sera without elevated IgG3 level, all DS sera and all control sera were negative for brain autoantibody. This finding indirectly suggests that brain autoantibody is mainly due to IgG3 subclass, at least in one subset of AD patients.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.3109/08916938909019958 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Basic Science and Pathogenesis.
Alzheimers Dement
December 2024
Massachusetts General Hospital, Boston, MA, USA.
Two broad classes of mechanisms have emerged for understanding the Amyloid-Related Imaging Abnormalities (ARIA) associated with anti-beta-amyloid immunotherapy. One set of mechanisms proposes that ARIA is driven by large-scale transfer of antibody-bound amyloid from brain parenchyma to the perivascular and vascular compartments. This class of mechanisms is indirectly supported by neuropathological evidence that immunotherapy substantially clears plaque amyloid while increasing vessel-associated amyloid, but has been difficult to directly demonstrate.
View Article and Find Full Text PDFBasic Science and Pathogenesis.
Alzheimers Dement
December 2024
Brown University, Providence, RI, USA.
Background: Chitinase-3-like protein 1 (CHI3L1, or YKL-40) is an important regulator of immunity and, in the brain, is primarily secreted by activated astrocytes and heralds a neurotoxic inflammatory state. While it has been well known as a high-profile biomarker for Alzheimer's disease (AD) and inflammatory brain conditions (e.g.
View Article and Find Full Text PDFBasic Science and Pathogenesis.
Alzheimers Dement
December 2024
University of Milano - Bicocca, Monza, Monza, Italy, iCAB International Network, University of Milano - Bicocca, Monza, Italy.
ARIA-E/H (amyloid-related imaging abnormalities-Edema/Hemorrhage) is an umbrella term that defines the radiographic appearance of MRI images abnormality during treatments with Aβ-lowering monoclonal antibodies (mAbs) for Alzheimer's disease immunotherapy. Today, it is well-recognized that ARIA-E events can also occur spontaneously in patients with cerebral amyloid angiopathy-related inflammation (CAA-ri), a rare autoimmune encephalopathy associated with raised cerebrospinal fluid (CSF) concentrations of spontaneous auto-antibodies against Aβ (aAbs). In this framework, the last years of research and experience of the iCAB international Network generated an increased consensus that therapy-induced ARIA is the iatrogenic manifestation of CAA-ri.
View Article and Find Full Text PDFPredicting autoimmune thyroiditis in primary Sjogren's syndrome patients using a random forest classifier: a retrospective study.
Arthritis Res Ther
January 2025
Scientific Research Project Department, Guangdong Artificial Intelligence and Digital Economy Laboratory (Guangzhou), Pazhou Lab, Guangzhou, China.
Background: Primary Sjogren's syndrome (pSS) and autoimmune thyroiditis (AIT) share overlapping genetic and immunological profiles. This retrospective study evaluates the efficacy of machine learning algorithms, with a focus on the Random Forest Classifier, to predict the presence of thyroid-specific autoantibodies (TPOAb and TgAb) in pSS patients.
Methods: A total of 96 patients with pSS were included in the retrospective study.
Clozapine and rapamycin reverse behavioral abnormalities in an animal model of autoimmune schizophrenia.
Neuropharmacology
December 2024
State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China; Neuroscience center, Chinese Academy of Medical Sciences, Beijing, China. Electronic address:
Objective: Autoantibody-associated psychosis represents a distinct disease subgroup of patients with schizophrenia with a suspected autoimmune origin. Although preliminary studies have suggested adjunctive drug treatment strategies targeting the immune system, further validation of these findings is warranted. Autoantibodies against SFT2D2 have been identified in patients with schizophrenia.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!