Inflammatory Cytokine-Producing Cells and Inflammation Markers in the Synovium of Osteoarthritis Patients Evidenced in Human Herpesvirus 7 Infection

A direct association between joint inflammation and the progression of osteoarthritis (OA) has been proposed, and synovitis is considered a powerful driver of the disease. Among infections implicated in the development of joint disease, human herpesvirus 7 (HHV-7) infection remains poorly characterized. Therefore, we assessed synovitis in OA patients; determined the occurrence and distribution of the HHV-7 antigen within the synovial membrane of OA-affected subjects; and correlated plasma levels of the pro-inflammatory cytokines tumor necrosis factor (TNF), interleukin-6 (IL-6), and TNF expressed locally within lesioned synovial tissues with HHV-7 observations, suggesting differences in persistent latent and active infection. Synovial HHV-7, CD4, CD68, and TNF antigens were detected immunohistochemically. The plasma levels of TNF and IL-6 were measured by an enzyme-linked immunosorbent assay. Our findings confirm the presence of persistent HHV-7 infection in 81.5% and reactivation in 20.5% of patients. In 35.2% of patients, virus-specific DNA was extracted from synovial membrane tissue samples. We evidenced the absence of histopathologically detectable synovitis and low-grade changes in the majority of OA patients enrolled in the study, in both HHV-7 PCR+ and HHV-7 PCR‒ groups. The number of synovial CD4-positive cells in the HHV-7 polymerase chain reaction (PCR)+ group was significantly higher than that in the HHV-7 PCR‒ group. CD4- and CD68-positive cells were differently distributed in both HHV-7 PCR+ and HHV-7 PCR‒ groups, as well as in latent and active HHV-7 infection. The number of TNF+ and HHV-7+ lymphocytes, as well as HHV-7+ vascular endothelial cells, was strongly correlated. Vascular endothelial cells, especially in the case of infection reactivation, appeared vulnerable. The balance between virus latency and reactivation is a long-term relationship between the host and infectious agent, and the immune system appears to be involved in displaying overreaction when a shift in the established equilibrium develops.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:21

Enthalten in:

International journal of molecular sciences - 21(2020), 17 vom: 20. Aug.

Sprache:

Englisch

Beteiligte Personen:

Groma, Valerija [VerfasserIn]
Tarasovs, Mihails [VerfasserIn]
Skuja, Sandra [VerfasserIn]
Semenistaja, Sofija [VerfasserIn]
Nora-Krukle, Zaiga [VerfasserIn]
Svirskis, Simons [VerfasserIn]
Murovska, Modra [VerfasserIn]

Links:

Volltext

Themen:

Biomarkers
CD4 Antigens
Cytokines
DNA, Viral
ELISA
HHV-7
IL6 protein, human
Immunohistochemistry
Interleukin-6
Journal Article
Osteoarthritis
PCR
Synovium
TNF protein, human
Tumor Necrosis Factor-alpha

Anmerkungen:

Date Completed 13.04.2021

Date Revised 13.04.2021

published: Electronic

Citation Status MEDLINE

doi:

10.3390/ijms21176004

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM313991669