Harnessing lipid signaling pathways to target specialized pro-angiogenic neutrophil subsets for regenerative immunotherapy

To gain insights into neutrophil heterogeneity dynamics in the context of sterile inflammation and wound healing, we performed a pseudotime analysis of single-cell flow cytometry data using the spanning-tree progression analysis of density-normalized events algorithm. This enables us to view neutrophil transitional subsets along a pseudotime trajectory and identify distinct VEGFR1, VEGFR2, and CXCR4 high-expressing pro-angiogenic neutrophils. While the proresolving lipid mediator aspirin-triggered resolvin D1 (AT-RvD1) has a known ability to limit neutrophil infiltration, our analysis uncovers a mode of action in which AT-RvD1 leads to inflammation resolution through the selective reprogramming toward a therapeutic neutrophil subset. This accumulation leads to enhanced vascular remodeling in the skinfold window chamber and a proregenerative shift in macrophage and dendritic cell phenotype, resulting in improved wound closure after skin transplantation. As the targeting of functional immune subsets becomes the key to regenerative immunotherapies, single-cell pseudotime analysis tools will be vital in this field.

Wet cocker spaniel therapy: an essay on technique in family therapy

Wet Cocker Spaniel Therapy is a metaphor for the therapist's use of spontaneous techniques arising from the specific therapeutic situation rather than planned techniques from the therapist's training or allegiances. The paper proposes a problem-oriented, rather than technique-oriented, approach to family therapy. Most therapy can be performed in a calm, polite, rational, straightforward manner without any tricks or therapeutic razzle-dazzle. From time to time, the therapist may have to startle or jerk the family past a snag point and into change. Ideally, the therapist's techniques should arise from the content of the hour and the symbolism of the family and should be applied sparingly. I hope this paper will make therapists feel more comfortable being sane, polite, and practical, and unashamed when not being brilliant.