Faculty Opinions recommendation of Identical beta cell-specific CD8(+) T cell clonotypes typically reside in both peripheral blood lymphocyte and pancreatic islets.

2007 ◽  
Author(s):  
Mark Atkinson
Keyword(s):  
T Cell ◽  
Beta Cell ◽  
Pancreatic Islets ◽  
Peripheral Blood Lymphocyte ◽  
Peripheral Blood ◽  
Blood Lymphocyte ◽  
Cd8 T Cell

scholarly journals Identical β Cell-Specific CD8+ T Cell Clonotypes Typically Reside in Both Peripheral Blood Lymphocyte and Pancreatic Islets

2007 ◽  
Vol 178 (3) ◽  
pp. 1388-1395 ◽  
Author(s):  
Carmen P. Wong ◽  
Rosemary Stevens ◽  
Brian Long ◽  
Li Li ◽  
Yaming Wang ◽  
...  
Keyword(s):  
T Cell ◽  
Pancreatic Islets ◽  
Peripheral Blood Lymphocyte ◽  
Peripheral Blood ◽  
Blood Lymphocyte ◽  
Cd8 T Cell ◽  
Β Cell

scholarly journals B- and T-Cell Responses After SARS-CoV-2 Vaccination in Patients With Multiple Sclerosis Receiving Disease Modifying Therapies: Immunological Patterns and Clinical Implications

2022 ◽  
Vol 12 ◽  
Author(s):  
Marco Iannetta ◽  
Doriana Landi ◽  
Gaia Cola ◽  
Laura Campogiani ◽  
Vincenzo Malagnino ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
T Cell ◽  
Peripheral Blood Lymphocyte ◽  
T Lymphocyte ◽  
Peripheral Blood ◽  
Blood Lymphocyte ◽  
T Cell Responses ◽  
Immunological Responses ◽  
Cell Responses ◽  
Disease Modifying

BackgroundVaccination campaign to contrast the spread of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) has raised the issue of vaccine immunogenicity in special populations such as people with multiple sclerosis (PwMS) on highly effective disease modifying treatments (DMTs). While humoral responses to SARS-CoV-2 mRNA vaccines have been well characterized in the general population and in PwMS, very little is known about cell-mediated responses in conferring protection from SARS-CoV-2 infection and severe coronavirus disease-2019 (COVID-19).MethodsPwMS on ocrelizumab, fingolimod or natalizumab, vaccinated with two doses of mRNABNT162b2 (Comirnaty®) vaccine were enrolled. Anti-Spike (S) and anti-Nucleoprotein (N) antibody titers, IFN-gamma production upon S and N peptide libraries stimulation, peripheral blood lymphocyte absolute counts were assessed after at least 1 month and within 4 months from vaccine second dose administration. A group of age and sex matched healthy donors (HD) were included as reference group. Statistical analysis was performed using GraphPad Prism 8.2.1.ResultsThirty PwMS and 9 HDs were enrolled. All the patients were negative for anti-N antibody detection, nor reported previous symptoms of COVID-19. Peripheral blood lymphocyte counts were assessed in PwMS showing: (i) reduction of circulating B-lymphocytes in PwMS on ocrelizumab; (ii) reduction of peripheral blood B- and T-lymphocyte absolute counts in PwMS on fingolimod and (iii) normal B- and T-lymphocyte absolute counts with an increase in circulating CD16+CD56+ NK-cells in PwMS on natalizumab. Three patterns of immunological responses were identified in PwMS. In patients on ocrelizumab, anti-S antibody were lacking or reduced, while T-cell responses were normal. In patients on fingolimod both anti-S titers and T-cell mediated responses were impaired. In patients on natalizumab both anti-S titers and T-cell responses were present and comparable to those observed in HD.ConclusionsThe evaluation of T-cell responses, anti-S titers and peripheral blood lymphocyte absolute count in PwMS on DMTs can help to better characterize the immunological response after SARS-CoV-2 vaccination. The evaluation of T-cell responses in longitudinal cohorts of PwMS will help to clarify their protective role in preventing SARS-CoV-2 infection and severe COVID-19. The correlation between DMT treatment and immunological responses to SARS-CoV-2 vaccines could help to better evaluate vaccination strategies in PwMS.

scholarly journals Effects of Short-Term Low-Dose Glucocorticoids for Patients with Mild COVID-19

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Hai-Yan Fu ◽  
Yu Luo ◽  
Jian-Peng Gao ◽  
Lin Wang ◽  
Hong-Juan Li ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
Nucleic Acid ◽  
Peripheral Blood Lymphocyte ◽  
Effect Size ◽  
Peripheral Blood ◽  
Lymphocyte Count ◽  
Blood Lymphocyte ◽  
Short Term ◽  
The Absolute

Objectives. To evaluate the role of short-term low-dose glucocorticoids in mild COVID-19 patients. Methods. We conducted a retrospective, cross-sectional, single-center study in Kunming, China. A total of 33 mild COVID-19 cases were divided into two treatment groups (with and without glucocorticoids, methylprednisolone, were used in this setting), and the absolute value of peripheral blood lymphocyte count; CD3+, CD4+, and CD8+ T cell counts; and the time to achieve negative transformation of a nucleic acid pharyngeal swab were recorded. Peripheral blood lymphocyte and T cell counts were compared between the treatment group and 25 healthy individuals. At the point of time when there was a 50% accumulation conversion rate (positive to negative nucleic acid on pharyngeal swab), and the nucleic acid turned negative in half of the patients in two groups, the peripheral blood lymphocyte and T cell counts were compared between treatment groups. Results. The mean cumulative time for the 50% negative conversion rate of the nucleic acid in the pharyngeal swab was 17.7±5.1 days and 13.9±5.4 days in the glucocorticoid group and the nonglucocorticoid group, respectively. The absolute peripheral blood lymphocyte count and the T cell subset count in the glucocorticoid group were lower than those in the nonglucocorticoid group. When the nucleic acid turned negative in half of the patients, the absolute value of peripheral blood lymphocyte count and CD4+ T cells of the glucocorticoid group and the nonglucocorticoid group was not significantly different; the CD3+ and CD8+ T cells in the glucocorticoid group were lower than those in the nonglucocorticoid group. The absolute peripheral blood lymphocyte count, CD3+ T cells, and CD4+ T cells in the glucocorticoid group were lower than those of the healthy group during the whole disease period, and CD8+ T cells returned to normal at 19-21 days of the disease period. There was no significant difference between the nonglucocorticoid group and the healthy group for absolute peripheral blood lymphocyte and CD8+ T cells; moreover, CD3+ T cells and CD4+ T cells were lower in the nonglucocorticoid group than those in the healthy group from the day of admission to the 18th day and returned to normal at the period of 19-21 days. The absolute peripheral lymphocyte count (P=0.048, effect size d=0.727) and T cell subset count (CD3: P=0.042, effect size d=0.655; CD4: P<0.01, effect size d=0.599; and CD8: P=0.034, effect size d=0.550) in the nonglucocorticoid group were higher than those in the glucocorticoid group, and the difference between the groups was statistically significant. Conclusions. This study found that the use of short-term, low-dose glucocorticoids does not negatively influence the clinical outcome, without affecting the final clearance of viral nucleic acid in mild COVID-19 patients.

scholarly journals Decreased Peripheral Blood Lymphocyte-Monocyte Ratio and Platelet-Monocyte Ratio and the Peripheral Blood Score Model Predict Poor Survival in Peripheral T-cell Lymphoma Patients

2020 ◽  
Author(s):  
Yan Zhang ◽  
Yuanfei Shi ◽  
Huafei Shen ◽  
Lihong Shou ◽  
Qiu Fang ◽  
...  
Keyword(s):  
T Cell ◽  
High Risk ◽  
Peripheral Blood Lymphocyte ◽  
Peripheral Blood ◽  
Blood Lymphocyte ◽  
Cell Lymphoma ◽  
Risk Group ◽  
Low Risk ◽  
T Cell Lymphoma ◽  
Peripheral T Cell Lymphoma

Abstract Background. Peripheral T-cell lymphoma(PTCL) is a group of lymphoproliferative tumors originated from post-thymic T cells or mature natural killer (NK) cells. It shows highly aggressive clinical behaviour, resistance to conventional chemotherapy, and a poor prognosis. Its incidence rate in China is 1 to 2 times higher than in western countries. Therefore, optimal strategies for identifying high-risk patients are urgently needed. Methods. We retrospectively studied 347 newly diagnosed PTCL patients from January 2011 to October 2019 and analyzed the relationship between peripheral blood lymphocyte-monocyte ratio (LMR) and platelet-monocyte ratio (PMR) and prognosis. The model of Peripheral Blood Score was established to screen out high-risk patients.Results. The receiver operating characteristic (ROC) curve was used to determine the optimal cut-off value based on survival rate. It was found that patients with PTCL with LMR ≤ 1.68 and PMR ≤ 300 had inferior overall survival (OS) and the difference was significant in both low-risk (P＜0.001) and medium high-risk (P＜0.001) groups of IPI score. In multivariate analysis, LMR ≤ 1.68 (HR=1.751, 95% CI 1.158-2.647, p=0.006), PMR ≤ 300 (HR=1.762, 95% CI 1.201-2.586, p=0.002), stage III-IV (HR=3.276, 95% CI 1.512-7.099, p=0.003), Eastern Cooperative Oncology Group (ECOG) score 3-5 (HR=2.351, 95% CI 1.647-3.356, p＜0.001) and extra-nodal invasion more than one site (HR=1.659, 95% CI 1.125-2.445, p=0.039) were independently associated with short survival. LMR and PMR were integrated into "Peripheral Blood Score (PBS)" model. PTCL patients were divided into three risk groups: low-risk group, medium risk group and high-risk group. The 1-year OS was 86%, 55.3% and 22.6%, and the 3-year OS was 43.4%, 20% and 13.1%, respectively.Conclusion. Overall, LMR and PMR can be used as early prognostic indicators in PTCL patients. Moreover, we can easily detect the complete blood cell count (CBC), and use PBS model to preliminarily screen and stratify patients. It is simple, convenient and accurate to screen out patients with short lives, and formulate personalized treatment strategies.

scholarly journals Ovarian hormone level alterations during rat post-reproductive life-span influence CD8 + T-cell homeostasis

2015 ◽  
Vol 240 (10) ◽  
pp. 1319-1332 ◽  
Author(s):  
Nevena Arsenović-Ranin ◽  
Duško Kosec ◽  
Mirjana Nacka-Aleksić ◽  
Ivan Pilipović ◽  
Zorica Stojić-Vukanić ◽  
...  
Keyword(s):  
T Cell ◽  
Peripheral Blood Lymphocyte ◽  
Peripheral Blood ◽  
Blood Lymphocyte ◽  
Peripheral Blood Lymphocytes ◽  
Reproductive Period ◽  
Ovarian Hormone ◽  
Proliferating Cells ◽  
Blood Lymphocytes ◽  
Old Rats

The study examined the putative role of ovarian hormones in shaping of rat peripheral T-cell compartment during post-reproductive period. In 20-month-old rats ovariectomized (Ox) at the very end of reproductive period, thymic output, cellularity and composition of major TCRαβ + peripheral blood lymphocyte and splenocyte subsets were analyzed. Ovariectomy led to the enlargement of CD8 + peripheral blood lymphocyte and splenocyte subpopulations. This reflected: (i) a more efficient thymic generation of CD8 + cells as indicated by increased number of CD4+CD8 + double positive and the most mature CD4-CD8+TCRαβhigh thymocytes and CD8 + recent thymic emigrants (RTEs) in peripheral blood, but not in the spleen of Ox rats, and (ii) the expansion of CD8 + memory/activated peripheral blood lymphocytes and splenocytes. The latter was consistent with a greater frequency of proliferating cells among freshly isolated memory/activated CD8 + peripheral blood lymphocytes and splenocytes and increased proliferative response of CD8 + splenocytes to stimulation with plate-bound anti-CD3 antibody. The former could be related to the rise in splenic IL-7 and IL-15 mRNA expression. Although ovariectomy affected the overall number of CD4 + T cells in none of the examined compartments, it increased CD4+FoxP3 + peripheral blood lymphocyte and splenocyte counts by enhancing their generation in periphery. Collectively, the results suggest that ovariectomy-induced long-lasting disturbances in ovarian hormone levels (mirrored in diminished progesterone serum level in 20-month-old rats) affects both thymic CD8 + cell generation and peripheral homeostasis and leads to the expansion of CD4+FoxP3 + cells in the periphery, thereby enhancing autoreactive cell control on account of immune system efficacy to combat infections and tumors.

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