Improving Functional Muscle Regeneration in Volumetric Muscle Loss Injuries by Shifting the Balance of Inflammatory and Pro-Resolving Lipid Mediators.

Severe tissue loss resulting from extremity trauma, such as volumetric muscle loss (VML), poses significant clinical challenges for both general and military populations. VML disrupts the endogenous tissue repair mechanisms, resulting in acute and unresolved chronic inflammation and immune cell presence, impaired muscle healing, scar tissue formation, persistent pain, and permanent functional deficits. The aberrant healing response is preceded by acute inflammation and immune cell infiltration which does not resolve.

Determinants of acute kidney injury in children with new onset type 1 diabetes: A cohort study of children aged <15 years: Auckland, New Zealand (2006-2016).

Objective: Acute kidney injury (AKI) may contribute to the risk of diabetic kidney disease, however, there have been limited studies of the incidence of AKI in well-defined populations of children with type 1 diabetes. The aim was to quantify AKI in children presenting with new onset type 1 diabetes from the regional paediatric diabetes service, Auckland, New Zealand.

Research Design And Methods: A retrospective analysis of a prospectively identified cohort study of children and adolescents presenting from 2006 to 2016 with type 1 diabetes aged <15 years.

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.

Teaching fidelity.

Working therapeutically with individuals or couples either following an affair or prior to its occurrence requires teaching them about risks to monogamy and the challenges of recovering from infidelity. Risks to monogamy include cultural myths about both infidelity and marriage that may be shared not only by lay persons, but also by their ill-informed therapists. Exacerbating risks to fidelity are physiological components of emotional and physical attraction that contribute to cognitive and affective disorientation.

Morphologic observations of experimental Campylobacter jejuni infection in the hamster intestinal tract.

The authors have developed a model for the diarrhea and intestinal lesions seen in Campylobacter jejuni enterocolitis by colonizing the hamster ileum and cecum with C jejuni. Erythematous inflammation of the ileum and cecum and distention of the cecum with fluid were observed at autopsy. The cecal mucosa appeared edematous.

Children of the rich.

Growing up rich is not an unmixed blessing. Great wealth has undoubted benefits, but it is not good for children. It distorts their functional relationship with the world, it belittles their own accomplishments, and it grotesquely amplifies their sense of what is good enough.

Entamoeba histolytica: purification of cathepsin B.

A cytotoxic cysteine proteinase with a molecular weight of 16,000 was isolated from axenically grown trophozoites of Entamoeba histolytica. The enzyme was purified from frozen-thawed strain HM-1 by ion-exchange chromatography on DEAE-cellulose, organomercurial agarose affinity chromatography, and size-exclusion chromatography. The purified enzyme had proteinase activity that could be demonstrated on azocasein (pH 5), hemoglobin (pH 5), or carbobenzoxy-L-arginyl--L-arginyl-7-amino-4-trifluoromethylcoumarin++ + (Z-arg-arg-AFC), a substrate specific for cathepsin B.

Experimental infection of hamsters with Campylobacter jejuni.

Campylobacter jejuni is a major cause of diarrhea and enterocolitis in humans and animals. A mammalian model has been developed for studying pathogenesis of the disease in hamsters by colonizing the ileum and cecum with C. jejuni via either oral intubation after purgation or direct surgical inoculation into the cecum.

Proteinase activities of Entamoeba histolytica cytotoxin.

The proteinase activity of the low molecular weight cytotoxin of Entamoeba histolytica was correlated with its cytotoxicity. Gel-filtered amebal toxin (mol wt 10-30,000) proteinase activities could be assayed on azocasein at pH 6 or on hemoglobin at pH 4.5.

Relationship of cytotoxins of axenically cultivated Entamoeba histolytica to virulence.

Clarified homogenates prepared from different strains of axenically reared Entamoeba histolytica were assayed for acid and neutral proteinase activity, cytotoxicity, and protein content. The homogenates of the more virulent strains contained more acid or neutral proteinase and more toxin units per 10(6) trophozoites. Toxicity and neutral proteinase activities had a similar pattern of distribution.

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.

Inhibition of Entamoeba histolytica cytotoxin by alpha 1 antiprotease and alpha 2 macroglobulin.

We previously reported partial purification of a proteinaceous substance with cytotoxic and enterotoxic activity isolated from the soluble fraction of sonicated axenically cultivated Entamoeba histolytica trophozoites. Demonstration of cytotoxic activity of the preparation (amebal toxin) was dependent on removal of serum from the tissue culture assay system. The objective of the present study was to identify the factor(s) in non-immune sera responsible for producing in vitro inhibition of amebal toxin cytotoxicity on HeLa cells.

Sequential histopathology of cavitary liver abscess. Formation induced by axenically grown Entamoeba histolytica.

Multiple hamster liver passage of Entamoeba histolytica trophozoites with intervening recovery into axenic culture caused increased virulence as measured by increase in the size of the lesion produced. Lesions produced by amebae that had not been liver-passaged did not persist; however, multiply liver-passaged substrains produced large, fluid-filled abscesses one month to six weeks after inoculation. Six days after inoculation, lesions consisted of multiple granulomas, lymphocytes, and E histolytica trophozoites.

Tolazamide-induced cholestasis.

The sulfonylurea hypoglycemic agent tolazamide is thought to be a rare cause of jaundice and to exhibit no hepatic cross-sensitivity with other sulfonylurea compounds. We have described a patient who had self-limited cholestatic jaundice after treatment with chlorpropamide. Subsequent treatment with tolazamide resulted in recurrence of jaundice, which disappeared after cessation of treatment.

Cimetidine-induced exfoliative dermatitis.

A 68-year-old woman developed exfoliative dermatitis while taking cimetidine for gastritis. She had no history of previous drug reactions, allergies, or skin disorders and had taken no other medications for three months. Although cimetidine is a relatively safe drug, severe reactions such as exfoliative dermatitis can occur.

Sequential histopathology of cavitary liver abscess formation induced by axenically grown Entamoeba histolytica.

Animal models of amebic hepatic abscess should parallel the human disease. Experimental amebic hepatic abscess in the hamster results in granulomatous lesions during the early period (six days) following inoculation. Hamster inoculated intrahepatically with axenically grown, non-liver passaged strains of Entamoeba histolytica revealed no evidence of lesions when sacrificed at later times.

Further studies on a cytotoxin/enterotoxin from Entamoeba histolytica.

More virulent strains of Entamoeba histolytica contain more cytotoxic activity per trophozoite than do less virulent strains. Clarified sonicates of the more virulent strains are more cytotoxic than those of less virulent strains. The cytotoxins of all these strains are inhibited by specific immune IgG raised in rabbits or produced by natural human infection.

Microscopic observations on the filopodia of Entamoeba histolytica.

Living Entamoeba histolytica trophozoites were examined by phase-contrast microscopy. Intact critical point dried trophozoites were examined by transmission electron microscopy at an accelerating voltage of 1000 kV (HVEM) and by scanning electron microscopy (SEM). Half and quarter micrometer thick sections of epoxy-embedded trophozoites were examined by HVEM.

Partial purification of a toxin found in hamsters with antibiotic-associated colitis. Reversible binding of the toxin by cholestyramine.

A toxin with cytotoxic and enterotoxic activities was isolated from cecal contents of hamsters receiving lincomycin. The toxin was partially purified by ultracentrifugation, ultrafiltration, (NH4)2SO4 precipitation, and gel filtration. Cytotoxic activity, assayed on monolayers of HeLa cells, was restricted to material that eluted in the molecular weight range of 107,000 +/- 6,000 daltons.

Light and electron microscopic studies of antibiotic associated colitis in the hamster.

Lincomycin and its analogue, clindamycin, are capable of producing mild to severe colonic mucosal injury in humans (antibiotic associated colitis). Patients with the disorder may have severe diarrhoea, pseudomembranous plaques, confluent pseudomembranes, and/or a frank, diffuse haemorrhagic colitis. The present study was designed to assess the Golden Syrian hamster as an animal model for antibiotic associated colitis and to describe lesions seen in the animal model by light, transmission electron, and scanning electron microscopy.

Isolation of a cytotoxin-enterotoxin from Entamoeba histolytica.

A heat-labile material with cytotoxic and enterotoxic activities was isolated from axenically cultivated Entamoeba histolytica. The cytotoxin-enterotoxin was partially purified from the particulate-free supernatant of sonicated trophozoites by ammonium sulfate precipitation and gel filtration. Cytotoxic activity, assayed on monolayers of HeLa or BHK-21 cells, was restricted to proteins that eluted in the molecular weight range of 25,000--35,000 daltons.

Cytotoxicity of a cell free extract of Entamoeba histolytica.

Previous attempts to demonstrate toxicity of cell-free extracts prepared from axenically cultivated E. histolytica have proved unsuccessful. We report here the successful production of cytopathic effect by cell-free extracts of two strains (HM-1 and HK-9) of E.