Immunophenotype of the inflammatory response in the central and enteric nervous systems of cockatiels (Nymphicus hollandicus) experimentally infected with parrot bornavirus 2

2022 ◽  
pp. 030098582110691
Author(s):  
Jeann Leal de Araújo ◽  
Raquel R. Rech ◽  
Aline Rodrigues-Hoffmann ◽  
Paula R. Giaretta ◽  
Cinthya Cirqueira ◽  
...  

Proventricular dilatation disease is a lethal disease of psittacine birds. In this study, we characterized the local cellular immune response in the brain, proventriculus, and small intestine of 27 cockatiels ( Nymphicus hollandicus) experimentally infected with parrot bornavirus 2 (PaBV-2). Perivascular cuffs in the brain were composed of CD3+ T-lymphocytes and Iba1+ macrophages/microglia in most cockatiels (n = 26). In the ganglia of the proventriculus, CD3+ T-lymphocytes (n = 17) and Iba1+ macrophages (n = 13) prevailed. The ganglia of the small intestine had a more homogeneous distribution of these leukocytes, including PAX5+ B-lymphocytes (n = 9), CD3+ T-lymphocytes (n = 8), and Iba1+ macrophages (n = 8). Our results indicate that perivascular cuffs in the brain and the inflammatory infiltrate in the proventriculus of PaBV-2-infected cockatiels is predominately composed of T-lymphocytes, while the inflammatory infiltrates in the ganglia of the small intestine are characterized by a mixed infiltrate composed of T-lymphocytes, B-lymphocytes, and macrophages.

2002 ◽  
Vol 39 (4) ◽  
pp. 445-451 ◽  
Author(s):  
J. Pérez ◽  
P. M. García ◽  
M. J. Bautista ◽  
Y. Millán ◽  
J. Ordás ◽  
...  

The immunophenotype of tumor cells and inflammatory infiltrate associated with cutaneous melanocytic lesions (29 melanocytomas, two malignant melanomas, and 23 residual lesions) from 54 adult Iberian and Iberian X Duroc pigs were examined using a panel of nine antibodies. All neoplastic cells were vimentin−, cytokeratin−, and alpha-1-antitrypsin− and the majority were S100+, whereas all pigmented macrophages were vimentin+, cytokeratin−, and S100− and most expressed alpha-1-antitrypsin. Regressing tumors were characterized by zones with low density of neoplastic cells accompanied by heavy infiltration of CD3+ T lymphocytes, whereas zones with high density of neoplastic cells showed very low numbers of CD3+ T lymphocytes. The infiltrate of CD79a+ B cells and IgG, IgM, and IgA plasma cells was low. The majority of lymphocytes of the peri- and intratumoral infiltrate were major histocompatibility complex class II+, but neoplastic cells did not express class II antigen. The 17 residual lesions examined were composed of macrophages containing abundant melanin pigment and low to moderate numbers of CD3+ T lymphocytes. The results of the present study suggest that the local cellular immune response plays a crucial role in the host response that induces regression of cutaneous melanomas and melanocytomas of the Iberian and crossbred Iberian X Duroc pigs.


2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Eliângela de Castro Côbo ◽  
Thales Parenti Silveira ◽  
Adilha Misson Micheletti ◽  
Eduardo Crema ◽  
Sheila Jorge Adad

To compare parasitism and inflammatory process in esophagus and colon from chronic chagasic patients, immunohistochemistry was carried out to research forT. cruziand to evaluate the inflammatory infiltrate in the muscular and myenteric plexus in 39 esophagi (20 with and 19 without megaesophagus) and 50 colons (25 with and 25 without megacolon). The frequency ofT. cruziin megaesophagus was 20%, and in megacolon it was 4%. No amastigotes were found in organs without mega; considering the total of esophagi (with and without mega), the frequency ofT. cruziwould be 10% and 2% in the colon. Myositis and ganglionitis were more frequent and intense in organs with mega compared to those without mega, and in esophagus compared to colon. Qualitatively, inflammatory infiltration in esophagus and colon, with or without mega, was similar, consisting predominantly of T lymphocytes (CD3+), scarce macrophages (CD68+), and rare B lymphocytes (CD20+).


2018 ◽  
pp. 5-8
Author(s):  
A.Ye. Demkovych ◽  
Yu.I. Bondarenko ◽  
M.M. Yakymchuk

One of the important factors that leads to damage of structures of the periodontal complex and leads to the formation of inflammatory process of varying degrees is the disruption of immunological processes. The aim of the study was to clarify the pathogenetic role of cellular adaptive immunity in the process of formation of chronic inflammatory reaction in the late period of the experimental bacterial-immune periodontitis. The study was conducted on white, non-breeding, clinically healthy male rats. Experimental bacterial-immune periodontitis in experimental animals was caused by insertion into the tissues of the periodontal complex a mixture of microorganisms diluted with egg protein. The obtained digital data was statistically processed using parametric and nonparametric statistical methods. The article represents the results of research on the parameters of cellular immune defense, determined by the relative number of CD3+ (common T-lymphocytes), CD4+ (T-helpers), CD8+ (cytotoxic cells, T-killers), CD19+ (B-lymphocytes), CD16+ (natural killers, NK-cell) and immunoregulatory index (CD4+ / CD8+) in intact animals and on the 30th day of experimental bacterial-immune periodontitis development. It was established that the nature of the course of experimental inflammation in the tissues of the periodontal complex depended on changes in the cellular immune status, accompanied by a decrease of the content of common mature T-lymphocytes (CD3+) in the blood of animals with experimental bacterial-immune periodontitis on the 30th day of the study. In the process of the development of the experimental bacterial-immune periodontitis there was a decrease of the content of T-lymphocytes-helper (CD4+) in the blood of animals and on the 30th day of the study an increase in T-suppressors (CD8+), an increase in the content of natural killers (CD16+) and a decrease in the relative content of B-lymphocytes (CD19+). The immunoregulatory index (CD4+ / СD8+) decreased in comparison with this indicator of a group of intact animals. In rats with bacterial-immune periodontitis, an immunosuppressive state developed in the late period of the inflammatory reaction due to both T-helper cells and cytotoxic T-suppressors / killers. These changes can be considered as signs of formation of the chronic course of the inflammatory process in the tissues of periodontal complex.


2005 ◽  
Vol 73 (7) ◽  
pp. 3923-3928 ◽  
Author(s):  
Lijin Li ◽  
Sharon M. Dial ◽  
Monika Schmelz ◽  
Margaret A. Rennels ◽  
Neil M. Ampel

ABSTRACT The in situ immunologic response in human coccidioidomycosis remains undefined. To explore this further, pulmonary necrotizing coccidioidal granulomata were examined using immunohistochemical staining for lymphocyte subsets and for the cytokines interleukin-10 (IL-10) and gamma interferon (IFN-γ). Discrete perigranulomatous lymphocytic clusters were seen in eight of nine tissues examined. In these tissues, T lymphocytes (CD3+) significantly outnumbered B lymphocytes (CD20+) in the mantle area of the granulomata (P = 0.028), whereas the clusters were composed of roughly equal numbers of T and B lymphocytes. While the number of cells in the mantle expressing IL-10 was similar to those in the perigranulomatous clusters, there were significantly more cells expressing IFN-γ in the mantle than in the clusters (P = 0.037). Confocal microscopy revealed that CD4+ T lymphocytes and B lymphocytes are associated with IL-10 production. CD4+CD25+ T lymphocytes were identified in the perigranulomatous clusters but were not associated with IL-10 production. This is the first report noting perigranulomatous lymphocyte clusters and IL-10 in association with human coccidioidal granulomata and suggests that down-regulation of the cellular immune response is occurring within coccidioidal granulomata.


2019 ◽  
Vol 67 (1) ◽  
pp. 81-86 ◽  
Author(s):  
Tais Meziara Wilson ◽  
Mizael Machado ◽  
Davi Emanuel Ribeiro De Sousa ◽  
Tainã Braúna ◽  
Rafael Torres Neto ◽  
...  

At clinical examination, a 5-year-old male domestic short-haired cat exhibited painful swelling and erythema of the pinnae of both ears. Microscopically, the lesions on both pinnae were composed of diffuse granulomatous chondritis with degeneration and necrosis of the pinnal cartilage. Numerous mast cells were also observed within and surrounding the inflammatory lesion. Immunohistochemistry showed a mixed inflammatory infiltrate characterised by the predominance of macrophages (CD68+, MAC 387+ and Lysozyme+), T lymphocytes (CD3+), some B lymphocytes (CD79α+) and neutrophils. Immunopathological characterisation of the lesion showed a granulomatous inflammation profile and suggests that the morphological changes and immunopathogenesis of auricular chondritis in cats presents a similarity with relapsing polychondritis in humans.


Author(s):  
Antonina Kouli ◽  
Marta Camacho ◽  
Kieren Allinson ◽  
Caroline H. Williams-Gray

AbstractParkinson’s disease dementia is neuropathologically characterized by aggregates of α-synuclein (Lewy bodies) in limbic and neocortical areas of the brain with additional involvement of Alzheimer’s disease-type pathology. Whilst immune activation is well-described in Parkinson’s disease (PD), how it links to protein aggregation and its role in PD dementia has not been explored. We hypothesized that neuroinflammatory processes are a critical contributor to the pathology of PDD. To address this hypothesis, we examined 7 brain regions at postmortem from 17 PD patients with no dementia (PDND), 11 patients with PD dementia (PDD), and 14 age and sex-matched neurologically healthy controls. Digital quantification after immunohistochemical staining showed a significant increase in the severity of α-synuclein pathology in the hippocampus, entorhinal and occipitotemporal cortex of PDD compared to PDND cases. In contrast, there was no difference in either tau or amyloid-β pathology between the groups in any of the examined regions. Importantly, we found an increase in activated microglia in the amygdala of demented PD brains compared to controls which correlated significantly with the extent of α-synuclein pathology in this region. Significant infiltration of CD4+ T lymphocytes into the brain parenchyma was commonly observed in PDND and PDD cases compared to controls, in both the substantia nigra and the amygdala. Amongst PDND/PDD cases, CD4+ T cell counts in the amygdala correlated with activated microglia, α-synuclein and tau pathology. Upregulation of the pro-inflammatory cytokine interleukin 1β was also evident in the substantia nigra as well as the frontal cortex in PDND/PDD versus controls with a concomitant upregulation in Toll-like receptor 4 (TLR4) in these regions, as well as the amygdala. The evidence presented in this study show an increased immune response in limbic and cortical brain regions, including increased microglial activation, infiltration of T lymphocytes, upregulation of pro-inflammatory cytokines and TLR gene expression, which has not been previously reported in the postmortem PDD brain.


1994 ◽  
Vol 37 (10) ◽  
pp. 1423-1430 ◽  
Author(s):  
Martin Aringer ◽  
Winfried Wintersberger ◽  
Carl W. Steiner ◽  
Hans Kiener ◽  
Elisabeth Presterl ◽  
...  

PLoS ONE ◽  
2016 ◽  
Vol 11 (3) ◽  
pp. e0150945 ◽  
Author(s):  
Nathalie Strazielle ◽  
Rita Creidy ◽  
Christophe Malcus ◽  
José Boucraut ◽  
Jean-François Ghersi-Egea

1981 ◽  
Vol 153 (4) ◽  
pp. 871-882 ◽  
Author(s):  
H Y Tse ◽  
J J Mond ◽  
W E Paul

For the purpose of examining more closely the interaction between T and B lymphocytes, we have developed an in vitro T lymphocyte-dependent B lymphocyte proliferation assay. Proliferation of B lymphocytes in response to antigen was found to depend on the presence of primed T lymphocytes; the B lymphocytes could be derived from nonprimed animals. It appears that these B cells were nonspecifically recruited to proliferate. This nonspecific recruitment, however, was found to be Ir-gene restricted in that B lymphocytes from B10.S mice, which are genetic nonresponders to the polymer Glu60-Ala30-Tyr10 (GAT), could not be stimulated by GAT-primed (responder X nonresponder) F1 T cells. The apparent lack of antigen specificity in the face of Ir gene-restricted T-B interaction may have important implications in our understanding of the recognition unit(s) on T lymphocytes.


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