scholarly journals Differential expression of CXCR3 and CCR6 on CD4+ T-lymphocytes with distinct memory phenotypes characterizes tuberculosis-associated immune reconstitution inflammatory syndrome

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Paulo S. Silveira-Mattos ◽  
Gopalan Narendran ◽  
Kevan Akrami ◽  
Kiyoshi F. Fukutani ◽  
Selvaraj Anbalagan ◽  
...  
Keyword(s):  
T Lymphocytes ◽  
Differential Expression ◽  
Immune Reconstitution Inflammatory Syndrome ◽  
Immune Reconstitution ◽  
Inflammatory Syndrome

scholarly journals A potential mechanism of the onset of immune-related pneumonitis triggered by anti-PD-1 treatment in a patient with advanced adenocarcinoma lung cancer: case report

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Yu Feng ◽  
Cuncun Chen ◽  
Liming Zhao ◽  
Xuyou Zhu ◽  
Xiaoping Zhu ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Case Report ◽  
T Lymphocytes ◽  
Immune Reconstitution Inflammatory Syndrome ◽  
Immune Reconstitution ◽  
Treg Cells ◽  
Potential Mechanism ◽  
Long Term Treatment ◽  
Inflammatory Syndrome

Abstract Background In recent years, the application of immunotherapy combined with chemotherapy in the first-line lung cancer has showed significant benefit in improving long-term survival. Immunotherapy also has risks of immune-related pneumonitis (IRP) after long-term treatment. Despite the treatment strategy of the IRP has been very clear. However, the mechanism is unclear. Case presentation A 73-year-old male patient was diagnosed with left lung adenocarcinoma IVa, EGFR, ALK, ROS1 negative. The patient received anti-PD1 antibody combined with pemetrexed and cisplatin. After 5 cycles of treatment, partial response was obtained. Subsequently, the patient continued the treatment of anti-PD1 antibody combined with pemetrexed. Before the 7th cycle, the CT found a new lesion in the basal segment of the right lower lobe. It was diagnosed with IRP and pneumocystis jirovecii. The patient did not give trimethoprim–sulphamethoxazole (TMP–SMX) and corticosteroids, symptoms and radiological lesions had improved. We describe the report of immune-related pneumonitis trigged by anti PD-1 and monitored the dynamic changes of CD4+, CD8+ T lymphocytes, MDSC and Treg cells in the bilateral bronchoalveolar alveolar lavage fluid. From the point of view of immune cells, the mechanism of immune reconstitution inflammatory syndrome is confirmed. Based on the current case report and literature, this study proposes a potential mechanism of the onset. Conclusion Immune reconstitution inflammatory syndrome may be potential mechanism of IRP. This study may improve our understanding of the pathogenesis underlying IRP. We believe the detection and dynamic monitoring CD4+, CD8+ T lymphocytes, MDSC and Treg cells can provide more accurate procedures.

scholarly journals Dynamics of T-Lymphocyte Activation Related to Paradoxical Tuberculosis-Associated Immune Reconstitution Inflammatory Syndrome in Persons With Advanced HIV

2021 ◽  
Vol 12 ◽  
Author(s):  
Rafael Tibúrcio ◽  
Beatriz Barreto-Duarte ◽  
Gopolan Naredren ◽  
Artur T. L. Queiroz ◽  
Selvaraj Anbalagan ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
T Lymphocytes ◽  
T Lymphocyte ◽  
Immune Reconstitution Inflammatory Syndrome ◽  
Immune Reconstitution ◽  
Lymphocyte Activation ◽  
Art Initiation ◽  
T Lymphocyte Activation ◽  
Inflammatory Syndrome

Most persons living with HIV (PLWH) experience a significant restoration of their immunity associated with successful inhibition of viral replication after antiretroviral therapy (ART) initiation. Nevertheless, with the robust quantitative and qualitative restoration of CD4+ T-lymphocytes, a fraction of patients co-infected with tuberculosis develop immune reconstitution inflammatory syndrome (TB-IRIS), a dysregulated inflammatory response that can be associated with significant tissue damage. Several studies underscored the role of adaptive immune cells in IRIS pathogenesis, but to what degree T lymphocyte activation contributes to TB-IRIS development remains largely elusive. Here, we sought to dissect the phenotypic landscape of T lymphocyte activation in PLWH coinfected with TB inititating ART, focusing on characterization of the profiles linked to development of TB-IRIS. We confirmed previous observations demonstrating that TB-IRIS individuals display pronounced CD4+ lymphopenia prior to ART initiation. Additionally, we found an ART-induced increase in T lymphocyte activation, proliferation and cytotoxicity among TB-IRIS patients. Importantly, we demonstrate that TB-IRIS subjects display higher frequencies of cytotoxic CD8+ T lymphocytes which is not affected by ART. Moreover, These patients exhibit higher levels of activated (HLA-DR+) and profilerative (Ki-67+) CD4+ T cells after ART commencenment than their Non-IRIS counterparts. Our network analysis reveal significant negative correlations between Total CD4+ T cells counts and the frequencies of Cytotoxic CD8+ T cells in our study population which could suggest the existance of compensatory mechanisms for Mtb-infected cells elimination in the face of severe CD4+ T cell lymphopenia. We also investigated the correlation between T lymphocyte activation profiles and the abundance of several inflammatory molecules in plasma. We applied unsupervised machine learning techniques to predict and diagnose TB-IRIS before and during ART. Our analyses suggest that CD4+ T cell activation markers are good TB-IRIS predictors, whereas the combination of CD4+ and CD8+ T cells markers are better at diagnosing TB-IRIS patients during IRIS events Overall, our findings contribute to a more refined understanding of immunological mechanisms in TB-IRIS pathogenesis that may assist in new diagnostic tools and more targeted patient management.

scholarly journals “Chronic Disseminated Aspergillosis,” a Novel Fungal Immune Reconstitution Inflammatory Syndrome

2020 ◽  
Vol 7 (11) ◽  
Author(s):  
Annabelle Pourbaix ◽  
Romain Guery ◽  
Julie Bruneau ◽  
Estelle Blanc ◽  
Gregory Jouvion ◽  
...  
Keyword(s):  
Immune Reconstitution Inflammatory Syndrome ◽  
Immune Reconstitution ◽  
Clinical Presentation ◽  
Castleman Disease ◽  
Disease Symptoms ◽  
Disseminated Candidiasis ◽  
Multicentric Castleman Disease ◽  
Chronic Disseminated Candidiasis ◽  
Disseminated Aspergillosis ◽  
Inflammatory Syndrome

Abstract We report a case of chronic hepatosplenic aspergillosis following immune reconstitution complicating colic aspergillosis in an AIDS patient with multicentric Castleman disease. Symptoms mimicked the clinical presentation of chronic disseminated candidiasis and responded to corticosteroid. This emerging entity enlarges the spectrum of fungal immune reconstitution inflammatory syndrome in the HIV setting.

scholarly journals High Levels of TNF-α and TIM-3 as a Biomarker of Immune Reconstitution Inflammatory Syndrome in People with HIV Infection

Life ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 527
Author(s):  
Lucero A. Ramon-Luing ◽  
Ranferi Ocaña-Guzman ◽  
Norma A. Téllez-Navarrete ◽  
Mario Preciado-García ◽  
Dámaris P. Romero-Rodríguez ◽  
...  
Keyword(s):  
Immune Reconstitution Inflammatory Syndrome ◽  
Immune Reconstitution ◽  
Control Group ◽  
Hiv Patients ◽  
Art Initiation ◽  
Tnf Α ◽  
Ifn Γ ◽  
Α Level ◽  
Inflammatory Syndrome

Immune reconstitution inflammatory syndrome (IRIS) is an exacerbated immune response that can occur to HIV+ patients after initiating antiretroviral therapy (ART). IRIS pathogenesis is unclear, but dysfunctional and exhausted cells have been reported in IRIS patients, and the TIM-3/Gal-9 axis has been associated with chronic phases of viral infection. This study aimed to evaluate the soluble levels of TIM-3 and Gal-9 and their relationship with IRIS development. TIM-3, Gal-9, TNF-α, IFN-γ, IL-6, TNFR1, TNFR2, E-cadherin, ADAM10, and ADAM17 were measured to search for IRIS-associated biomarkers in plasma samples from 0-, 4-, 8-, 12-, and 24-weeks after ART initiation of 61 HIV+ patients (15 patients developed IRIS, and 46 did not). We found that patients who developed IRIS had higher levels of TIM-3 [median 4806, IQR: 3206–6182] at the time of the IRIS events, compared to any other follow-up time evaluated in these patients or compared with a control group of patients who did not develop IRIS. Similarly, IRIS patients had a higher TNF-α level [median 10.89, IQR: 8.36–12.34] at IRIS events than any other follow-up time evaluated. Other molecules related to the TIM-3 and TNF-α pathway (Gal-9, IL-6, IFN-γ, TNFR1, TNFR2, ADAM-10, and ADAM-17) did not change during the IRIS events. In conclusion, our data suggest that a high level of soluble TIM-3 and TNF-α could be used as an IRIS biomarker.

scholarly journals Disseminated Mycobacterium simiae and Mycobacterium avium infection causing an immune reconstitution inflammatory syndrome in a female patient with HIV infection

2021 ◽  
Vol 14 (5) ◽  
pp. e241037
Author(s):  
Jacqueline Alexandra Bachofner ◽  
Kristian Ikenberg ◽  
Bettina Schulthess ◽  
Johannes Nemeth
Keyword(s):  
Hiv Infection ◽  
Mycobacterium Avium ◽  
Immune Reconstitution Inflammatory Syndrome ◽  
Immune Reconstitution ◽  
Avium Infection ◽  
Inflammatory Syndrome ◽  
Mycobacterium Simiae ◽  
Mycobacterium Avium Infection ◽  
Standard Treatment Regimen

This case study discusses the management of a disseminated Mycobacterium simiae and Mycobacterium avium infection causing an immune reconstitution inflammatory syndrome in a 52-year-old woman with HIV infection. Disseminated M. avium infections have extensively been described in HIV patients; however, reports of infections with M. simiae are rare. Treatment of M. simiae infections is challenging due to its high rates of natural drug resistances, and thus far, no standard treatment regimen exists.

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