scholarly journals Antibody-mediated broad sarbecovirus neutralization through ACE2 molecular mimicry

Science ◽  
2022 ◽  
Author(s):  
Young-Jun Park ◽  
Anna De Marco ◽  
Tyler N. Starr ◽  
Zhuoming Liu ◽  
Dora Pinto ◽  
...  
Keyword(s):  
Molecular Mimicry

scholarly journals CagA-PositiveHelicobacter pyloriInfection and Reduced Sperm Motility, Vitality, and Normal Morphology

2013 ◽  
Vol 35 ◽  
pp. 229-234 ◽  
Author(s):  
E. Moretti ◽  
G. Collodel ◽  
L. Mazzi ◽  
M. S. Campagna ◽  
N. Figura
Keyword(s):  
Sperm Motility ◽  
Normal Forms ◽  
Molecular Mimicry ◽  
Sperm Quality ◽  
Semen Analysis ◽  
Normal Morphology ◽  
Partial Linear ◽  
Caga Status ◽  
The Relationship ◽  
Autoimmune Phenomena

Helicobacter pylori(HP) infection, particularly when caused by strains expressing CagA, may be considered a concomitant cause of male and female reduced fertility. This study explored, in 87 HP-infected males, the relationship between infection by CagA-positive HP strains and sperm parameters. HP infection and CagA status were determined by ELISA and Western blotting; semen analysis was performed following WHO guidelines. The amino acid sequence of human enzymes involved in glycolysis and oxidative metabolism were “blasted” with peptides expressed by HP J99. Thirty-seven patients (42.5%) were seropositive for CagA. Sperm motility (18% versus 32%; ), sperm vitality (35% versus 48%; ) and the percentage of sperm with normal forms (18% versus 22%; ) in the CagA-positive group were significantly reduced versus those in the CagA-negative group. All the considered enzymes showed partial linear homology with HP peptides, but four enzymes aligned with four different segments of the samecagisland protein. We hypothesize a relationship between infection by strains expressing CagA and decreased sperm quality. Potentially increased systemic levels of inflammatory cytokines that occur in infection by CagA-positive strains and autoimmune phenomena that involve molecular mimicry could explain the pathogenetic mechanism of alterations observed.

scholarly journals FRI0435 THE CLINICAL SIGNIFICANCE OF SERUM AUTOANTIBODIES AND HLA-B27 MOLECULE TESTING IN UYGUR PATIENTS WITH HUMAN IMMUNODEFICIENCY VIRUS INFECTION

2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 815.3-815
Author(s):  
X. Chen ◽  
L. Wu ◽  
X. Wu ◽  
C. N. Luo ◽  
Y. M. Shi
Keyword(s):  
Human Immunodeficiency Virus ◽  
Hiv Infection ◽  
Highly Active Antiretroviral Therapy ◽  
Molecular Mimicry ◽  
Molecular Testing ◽  
Hla B27 ◽  
Clinical Value ◽  
Rheumatic Manifestations ◽  
Immunodeficiency Virus ◽  
Positive Rate

Background:AIDS is a deadly infectious disease caused by the HIV. When HIV infects a host, it may induce production of autoantibodies due to the structural antigen similarity between viral proteins and selfantigens.The molecular mimicry between HIV protein and self-antigens could cause antibody cross-reactions and lead to development of autoimmune disease.Objectives:To explore the clinical value of serum autoantibodies and human leukocyte antigen (HLA-B27) molecular testing in Uygur patients with human immunodeficiency virus (HIV) infection.Methods:A total of 727 HIV-infected Uygur patients who visited Kuche Infectious Diseases Hospital during May 2016 to March 2017 were include in this study. The other 390 healthy people were enrolled as controls. Serum antinuclear antibodies (ANA) and ANA Profile, anti-cyclic citrullinated peptide (CCP) antibody, and HLA-B27 molecule were tested.Results:Among 727 HIV-infected Uygur patients, 317 were males and 410 were females with mean age (35.52±13.44) years old. The mean duration of disease was (6.34±3.05)years. There were 697(95.87%) patients receiving Highly active antiretroviral therapy (HAART) with mean duration of treatment (6.34±3.05)years. Rheumatic manifestations were recorded in 238 (32.74%) HIV-infected Uygur patients, mainly with dry mouth and dry eye (15.41%), alopecia (9.90%), arthralgia (8.94%), ect. Compared with the health controls, positive ANA was more common in HIV infected Uygur patients (33.42%vs.17.43%,P< 0.001) with low titers (ANA titer:1:100). HIV-infected Uygur patients had higher positive anti-u1-RNP antibodies positive rate (1.10%), but lower anti-SSA antibodies positive rate (0.14%) and anti-CCP antibodies positive rate (0.28%). Patients with positive ANA in HAART group were significantly less than that in non-treatment group (38.72%vs.50.00%,P=0.049).Only one female patient was HLA-B27 positive (0.14%), which was significantly lower than that in healthy controls (3.08%) (P<0.001). Also, only one patient was diagnosed with rheumatoid arthritis (RA).Conclusion:Rheumatic manifestations are common in HIV-infected Uygur patients. Several autoantibodies are positive, but the coincidence of rheumatic diseases is rare. It’s noted that patients with Rheumatic manifestations and low titre positive ANA should be considered as a differential diagnosis of HIV infection.Disclosure of Interests:None declared

scholarly journals Molecular mimicry in the post-COVID-19 signs and symptoms of neurovegetative disorders?

2021 ◽  
Vol 2 (3) ◽  
pp. e94
Author(s):  
Antonella Marino Gammazza ◽  
Sébastien Légaré ◽  
Giosuè Lo Bosco ◽  
Alberto Fucarino ◽  
Francesca Angileri ◽  
...  
Keyword(s):  
Molecular Mimicry ◽  
Signs And Symptoms
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