Corrigendum: Identification of ACKR4 as an immune checkpoint in pulmonary arterial hypertension.

[This corrects the article DOI: 10.3389/fimmu.2023.1153573.].

Identification of ACKR4 as an immune checkpoint in pulmonary arterial hypertension.

Objective: Inflammation is recognized as a contributor in the development of pulmonary arterial hypertension (PAH), and the recruitment and functional capacity of immune cells are well-orchestrated by chemokines and their receptors. This study is aimed at identification of critical chemokines in the progression of PAH via transcriptomic analysis. Methods: Differentially expressed genes (DEGs) from lungs of PAH patients were achieved compared to controls based on Gene Expression Omnibus (GEO) database. Gene set enrichment analysis (GSEA) was applied for functional annotation and pathway enrichement. The abundance of immune cells was estimated by the xCell algorithm. Weighted correlation network analysis (WGCNA) was used to construct a gene expression network, based on which a diagnostic model was generated to determine its accuracy to distinguish PAH from control subjects. Target genes were then validated in lung of hypoxia-induce pulmonary hypertension (PH) mouse model. Results: ACKR4 (atypical chemokine receptor 4) was downregulated in PAH lung tissues in multiple datasets. PAH relevant biological functions and pathways were enriched in patients with low-ACKR4 level according to GSEA enrichment analysis. Immuno-infiltration analysis revealed a negative correlation of activated dendritic cells, Th1 and macrophage infiltration with ACKR4 expression. Three gene modules were associated with PAH via WGCNA analysis, and a model for PAH diagnosis was generated using CXCL12, COL18A1 and TSHZ2, all of which correlated with ACKR4. The ACKR4 expression was also downregulated in lung tissues of our experimental PH mice compared to that of controls. Conclusions: The reduction of ACKR4 in lung tissues of human PAH based on transcriptomic data is consistent with the alteration observed in our rodent PH. The correlation with immune cell infiltration and functional annotation indicated that ACKR4 might serve as a protective immune checkpoint for PAH.

Effect of a 1-Piece Drainable Pouch on Incontinence-Associated Dermatitis in Intensive Care Unit Patients With Fecal Incontinence: A Comparison Cohort Study.

PURPOSE: The purpose of this study was to compare the effect of a 1-piece drainable pouch to standard care on occurrences of incontinence-associated dermatitis (IAD) in intensive care unit (ICU) patients with fecal incontinence (FI). DESIGN: Nonrandomized comparison cohort (quasi-experimental) study. METHODS: Sixty-two bedridden patients with FI and indwelling urinary catheters in the ICU of the Shunde Hospital, Southern Medical University, Foshan, China, participated in the study. Thirty-one were assigned to the control group (standard IAD preventive care alone) and 31 to the intervention group (standard IAD preventive care plus application of a 1-piece drainable pouch). Stool consistency was evaluated via the Bristol Stool Scale. Trained nurses assessed the status of IAD using the Incontinence-Associated Dermatitis Intervention Tool. The incidence of IAD and the perianal skin status were investigated over a 7-day period. RESULTS: Participants in the experimental group had fewer IAD occurrences than participants in the control group (12.9% vs 41.9%, P < .05). Occurrences of IAD in the perianal were also significantly lower in the experimental group than in the control group (χ = 7.884, P < .05). CONCLUSION: Applying a 1-piece drainable pouch may reduce occurrences of IAD in ICU patients with FI compared with the patients receiving standard IAD preventive care.

A new approach combining venoarterial extracorporeal membrane oxygenation and CRRT for adults: a retrospective study.

PURPOSE: This study aimed to assess a new approach combining venoarterial (VA) extracorporeal membrane oxygenation (ECMO) and continuous renal replacement therapy (CRRT) in adults, while monitoring CRRT circuit pressures. METHODS: The inlet and outlet of the CRRT circuit were connected to preoxygenator port and postoxygenator port, respectively. Then, complications and CRRT circuit pressures were evaluated. RESULTS: 7 patients underwent combined VA-ECMO and CRRT; 16 filters were used. CRRT blood flow ranged from 150 to 200 mL/min; the CRRT to ECMO blood flow ratio was <0.1. The CRRT pressures at treatment initiation were normal. No complications were reported. CONCLUSIONS: This approach combining VA-ECMO and CRRT in adults did not compromise the accuracy of pressure monitoring systems for CRRT circuit function, and caused no complications. Hence, it may be a feasible method for performing combined VA-ECMO and CRRT in adults.

[A basic study and clinical trial of 585 nm pulsed dye laser in the treatment of congestive scars].

OBJECTIVE: To study the biological effects of 585 nm pulsed dye laser (FLPDL) in the treatment of congestive scar. METHODS: By histological study, collagen VG staining and microvascular staining, we investigated the changes of collagen fibers and the density of microvessels in the congestive scars after FLPDL treatment. RESULTS: Histological and immunohistochemistry examinations showed that FLPDL achieved normal vascularity in the scar after over 3 times of treatment. CONCLUSIONS: PDL treatment can change fundamentally the physiology of wound healing if applied in the early phases.