Derailed T-cell activation can give rise to life-threatening macrophage activation, the final common pathway of the different forms of reactive macrophage activation syndromes (rMAS). Besides inappropriate activation of the immune system, impaired termination of immune responses might be another mechanism leading to rMAS. The Fas (CD95)/Fas ligand (CD95 ligand) system functions in turning off immune responses by executing activation-induced cell death (AICD). Soluble Fas (sFas) and Fas ligand (sFasL) can interfere with their corresponding membrane-bound counterparts, qualifying them as potential parameters of impaired immune termination. Hence, sFas and sFasL were analyzed in sera of rMAS patients. We show that soluble Fas/CD95 (sFas) is elevated >2 SD over the mean of controls in all 8 rMAS episodes studied (mean 12.08 +/- 6.12 ng/mL, range 3.7-20.2; controls 2.46 +/- 0.49, range 1.5-2.9). sFasL was detected during five rMAS episodes (0.70 +/- 0.49 ng/mL, range 0.16-1.28; controls all below the limit of detection of 0.1). In addition, both parameters decrease during convalescence, reflecting clinical evolution. In conclusion, sFas seems to be consistently elevated during acute rMAS. sFasL is detected only in a subgroup of our adult rMAS patients extending the recent finding of sFasL elevation in a majority of children with macrophage activation syndromes (Hasegawa et al. Blood 1998;91(8):2793-2799). By interfering with AICD, sFas and sFasL might contribute to the pathogenesis of at least a subset of rMAS.
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January 2025
School of Science, Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application, Harbin Institute of Technology, Shenzhen, 518055, China.
Antibiotic-resistant bacteria often cause lethal infections in both the surficial and deep organs of humans. Failure of antibiotics in resistant infections leads to more effective alternative therapies, like spatiotemporally controllable piezodynamic therapy (PZDT) with deep penetration. Currently, PZDT demands further investigation for improved treatment outcomes and the corresponding therapeutic mechanisms.
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January 2025
Department of Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.
Unlabelled: Sepsis-induced acute liver injury (SALI) is a prevalent and life-threatening complication associated with sepsis. The gut microbiota plays a crucial role in the maintenance of health and the development of diseases. The impact of physical exercise on gut microbiota modulation has been well-documented.
View Article and Find Full Text PDFMediterr J Rheumatol
December 2024
Department of Clinical Immunology and Rheumatology, KGMU, Lucknow, India.
MDA5+ DM, or anti-melanoma differentiation-associated gene 5 antibody-positive dermatomyositis (DM), is a rare autoimmune illness that primarily affects women of Asian origin. The typical presentation of MDA5+ DM includes a variety of cutaneous lesions accompanied by either no muscular weakness (amyopathic) or hypomyopathic features. In patients with MDA5+ DM, rapid progression of interstitial lung disease is a frequent manifestation associated with poor prognosis.
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January 2025
Obstetrics and Gynecology Center, Department of Gynecology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, 510280, China.
Background: Preeclampsia, characterized by hypertension and proteinuria during pregnancy, poses significant risks to both mother and fetus. The complement system's aberrant activation, notably the C3AR1, is important to the pathogenesis of preeclampsia, although the precise mechanisms are not fully understood.
Materials And Methods: Utilizing the Comparative Toxicogenomics Database (CTD) and Molecular Signatures Database (MSigDB), we identified complement system targets associated with preeclampsia and environmental pollutants.
Cancer Lett
January 2025
Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China, 250117. Electronic address:
Successful immunotherapy requires systemic activation of the immune system. Radio-immunotherapy has a synergistic effect, enhancing this activation, but still faces many challenges, requiring methods to further improve its efficacy. Interleukin 15 (IL-15) is considered a potential therapeutic agent because of its broad immunoregulatory activity.
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