provided the histology images

provided the histology images. binding affinity toAcanthamoebaand chemotactic capacity bothin vitroandin vivo. Furthermore,in vivoanimal investigations indicated that the fusion protein presented excellent therapeutic effect and could effectively eliminate theAcanthamoebaburden. == Interpretation == This study revealed an immune evasion mechanism employed byAcanthamoebaand offered a therapeutic approach. It presents promising potential for enhancing the treatment of infectious diseases by targeting and overcoming challenges posed by immune evasion. == Funding == This work was funded by National Natural Science Foundation of China (grant number 82171017 and 82471041) and the Beijing Municipal Public Welfare Development and Reform Pilot Project for Medical Research Institutes (PWD&RPP-MRI, JYY2023-6). Keywords:Acanthamoebakeratitis, Single-cell RNA sequencing, Neutrophil, Immune therapy == Research in context. == == Evidence before this study == Since the first identification ofAcanthamoebakeratitis (AK) in 1974, Chlorantraniliprole its incidence has gradually increased in recent years. Despite substantial research efforts, the fundamental mechanisms underlying corneal infection remain poorly understand. This knowledge gap has contributed to limited treatment options and a poor prognosis. Previous investigators have revealed the correlation between immune cell (including neutrophil, macrophage and T cell) with prognosis. However, histopathology orin vivoconfocal microscopy could only provide limited information on the selected section. As a result, there Chlorantraniliprole is an urgent need to comprehensively understand the host immune response in AK. Likewise, the potential of immune-based interventions as a therapeutic strategy should be further explored and evaluated. == Added value of this study == Our investigation reveals significant neutrophil depletion and downregulation of neutrophil-active chemokines in the cornea of patients with AK. The engineered immunotherapeutic modality successfully reconstituted the neutrophil-mediated anti-Acanthamoebaaxis, demonstrating microenvironmental modulation capacity with therapeutic efficacy in preclinical models. == Implications of all the available evidence == Our study indicates that the antibody-cytokine fusion protein could effectively harness the targeting ability of antibodies and the chemotactic function of cytokines to recruit neutrophils. This immunotherapeutic approach holds promise not only forAcanthamoebakeratitis, but also for other infectious diseases characterized by immune evasion mechanisms. == Introduction == Acanthamoebakeratitis (AK) is a severe ocular infectious disease caused by theAcanthamoebaparasite, and its incidence has surged in parallel with the growing use of corneal contact lenses, especially orthokeratology lenses.1,2,3,4,5,6Current treatment options primarily include antiparasitic medications as well as surgical interventions in severe cases.7,8,9,10However, these treatments are limited and Chlorantraniliprole often ineffective, due to the parasites invasive and insidious nature complicates therapeutic interventions.11Despite extensive research, the immunological interactions between the host and the pathogen in AK remain poorly understood, leaving a gap in the understanding of the underlying mechanisms. To investigate Rabbit Polyclonal to SLC25A12 immune cell alteration in AK, we previously compared the corneal transcriptomes of AK patients with those of healthy controls. Surprisingly, the minimal differences in the composition of neutrophils and M1 macrophages were detected in both groups.12This finding suggests that AK patients have an inadequate immune response to effectively kill the pathogens causing the infection, despite the presence of these inflammatory cells.13There are several hypotheses including the alteration of surface antigens during the transformation of the parasite from trophozoites to cysts,14,15the degradation of host antibodies by the parasite,16,17or the parasite’s modulation of the host immune response.18However, these hypotheses are primarily derived from pathology or animal model results, while the precise corneal changes in the immune landscape and functions of immune cell in.