Anti-CD4 monoclonal antibody, clone ZLJY413.0

Intraspinal inflammatory and immune responses are considered to play central roles in the pathological development of spinal cord injury. This study aimed to decipher the dynamics of systemic immune responses, initiated by spinal cord injury. The spinal cord in mice was completely transected at T8. Changes in the in vivo inflammatory response, between the acute and subacute stages, were observed. A rapid decrease in C-reactive protein levels, circulating leukocytes and lymphocytes, spleen-derived CD4(+) interferon-gamma(+) T-helper cells, and inflammatory cytokines, and a marked increase in neutrophils, monocytes, and CD4(+)CD25(+)FOXP3(+) regulatory T-cells were observed during the acute phase. These systemic immune alterations were gradually restored to basal levels during the sub-acute phase. During the acute phase of spinal cord injury, systemic immune cells and factors showed significant inhibition; however, this inhibition was transient, and the indicators of these serious disorders gradually returned to baseline levels during the subacute phase.

Background: The world is facing the global spread of the severe acute respiratory syndrome coronavirus 2 (SARSCoV-2). T cell-induced immune responses during acute SARS-CoV-2 infection have rarely been reported. Methods: We use cell counting chips and PCR arrays to offer the first insights into the T cell involved in the course of acute SARS-CoV-2 infection. All consecutive patients with suspected SARS-CoV-2 infection treated at the designated hospital between January 2020 and February 2020 were recruited for the study, and cases were confirmed by real-time RT-PCR. Baseline characteristics for inpatients were prospectively collected and analyzed. Results: 96 patients with suspected SARS-CoV-2 infection in our center were screened for inclusion in the study. The median age of the patients was 39.0 years, and 47 (49.0%) were female. Multivariate logistic regression analysis showed that only the CD4+ cell counts were significantly lower in the infection group and slightly higher in the control group. Receiver operating characteristic curve analysis showed good discrimination power between subjects with and subjects without infection. Limitations: This is a single-center study of patients with a specific ethnic background and lacks a mechanism. Conclusions: These findings imply the importance of CD4+ T cells (but not CD8+ and CD3+ T cells) in SARSCoV-2 infection associated pneumonia and indicate that CD4+ T cells might be important for the control of SARS-CoV-2.