Subcutaneous injection of an immunologically tolerated protein up to 5 days before skin injuries improves wound healing

Oral tolerance blocks the development of specific immune responses to proteins ingested by the oral route. One of the first registries of oral tolerance showed that guinea pigs fed corn became refractory to hypersensitivity to corn proteins. Mice fed with chow containing corn are tolerant to zein, and parenteral injection of zein plus adjuvant blocks immunization to unrelated proteins injected concomitantly and reduces unspecific inflammation. Extensive and prolonged inflammatory infiltrate in the wound bed is one of the causes of pathological wound healing. Previous research shows that intraperitoneal injection of zein concomitant with skin injuries reduces the inflammatory infiltrate in the wound bed and improves wound healing. Herein, we tested if one subcutaneous injection of zein before skin injury improves wound healing. We also investigated how long the effects triggered by zein could improve skin wound healing. Mice fed zein received two excisional wounds on the interscapular skin under anesthesia. Zein plus Al(OH)3 was injected at the tail base at 10 min, or 3, 5, or 7 days before skin injuries. Wound healing was analyzed at days 7 and 40 after injury. Our results showed that a zein injection up to 5 days before skin injury reduced the inflammatory infiltrate, increased the number of T-cells in the wound bed, and improved the pattern of collagen deposition in the neodermis. These findings could promote the development of new strategies for the treatment and prevention of pathological healing using proteins normally found in the common diet.

Metallic limus-eluting stents abluminally coated with biodegradable polymers: angiographic and clinical comparison of a novel ultra-Thin sirolimus stent versus biolimus stent in the DESTINY Randomised Trial

AIMS:To evaluate the outcomes of patients treated with a new drug-eluting stent formulation with low doses of sirolimus, built in an ultra-thin-strut platform coated with biodegradable abluminal coating.METHODS:This study is a randomized trial that tested the main hypothesis that the angiographic late lumen loss of the novel sirolimus-eluting stent is noninferior compared with commercially available biolimus-eluting stent. A final study population comprising 170 patients with one or two de novo lesions was randomized in the ratio 2:1 for sirolimus-eluting stent or biolimus-eluting stent, respectively. The primary endpoint was 9-month angiographic in-stent late lumen loss. Adverse clinical events were prospectively collected for 1 year.RESULTS:After 9 months, the novel sirolimus-eluting stent was shown noninferior compared with the biolimus stent for the primary endpoint (angiographic in-stent late lumen loss: 0.20 ± 0.29 mm vs. 0.15 ± 0.20 mm, respectively; P value for noninferiority <0.001). The 1-year incidence of death, myocardial infarction, repeat revascularization, and stent thrombosis remained low and not significantly different between the groups.CONCLUSIONS:The present randomized trial demonstrates that the tested novel sirolimus-eluting stent was angiographically noninferior in comparison with a last-generation biolimus-eluting stent.

Mesh-covered embolic protection stent implantation in ST-segment-elevation myocardial infarction: final 1-year clinical and angiographic results from the MGUARD for acute ST elevation reperfusion trial

The MGuard, a bare metal stent covered with a polymer mesh, was designed to reduce distal embolization during percutaneous coronary intervention in ST-segment-elevation myocardial infarction. In the MGUARD for Acute ST Elevation Reperfusion trial, the primary end point of complete ST-segment resolution was significantly improved with the MGuard compared with control. We evaluated 1-year clinical and angiographic results.METHODS AND RESULTS:Patients with ST-segment-elevation myocardial infarction ≤12 hours undergoing primary percutaneous coronary intervention of a single de novo native lesion were randomized to the MGuard versus any commercially available metallic stent (39.8% drug-eluting). Clinical follow-up was performed through 1 year, and angiography at 13 months was planned in 50 MGuard patients. There was no difference in major adverse cardiac events (1.8% versus 2.3%; P=0.75) at 30 days between the groups. Major adverse cardiac events at 1 year were higher with the MGuard, driven by greater ischemia-driven target lesion revascularization (8.6% versus 0.9%; P=0.0003). Conversely, mortality tended to be lower with the MGuard at 30 days (0% versus 1.9%; P=0.04) and at 1 year (1.0% versus 3.3%; P=0.09). Late lumen loss at 13 months in the MGuard was 0.99±0.80 mm, and binary restenosis was 31.6%.CONCLUSIONS:In patients with ST-segment-elevation myocardial infarction undergoing primary percutaneous coronary intervention, a trend toward reduced 1-year mortality was present in patients treated with the MGuard stent. Target lesion revascularization and major adverse cardiac events rates during follow-up were higher in the MGuard group than in the control stent group, and angiographic late loss of the MGuard was consistent with that expected from bare metal stents.

A randomized trial of creatine-kinase leak after rosuvastatin in elective percutaneous coronary intervention (CLEAR-PCI)

OBJECTIVES: To determine the impact of percutaneous coronary intervention (PCI) performed at the same time of the peak concentration of rosuvastatin to reduce periprocedural myocardial infarction (PMI). BACKGROUND: Prior studies suggest that a high dose of statin before PCI reduce periprocedural myocardial infarction. However, there is no information regarding the elective PCI performed at the time of the peak of statin concentration to reduce PMI. METHODS: From 2001 to 2013, at a single center in Brazil we enrolled 544 patients who underwent elective PCI and after exclusions for baseline biases in clinical and angiographic characteristics, yielding 528 patients, we prospectively randomly assigned them to either a high loading dose of Rosuvastatin before PCI (n = 264) or standard treatment (n = 264). After exclusions for biases in procedural characteristics a total of 487 patients underwent to end points analysis. The primary outcome was the incidence of MB fraction of creatine kinase (CK-MB) greater than three times the upper limit of normal.RESULTS:The primary end point occurred in 7.6% in the rosuvastatin and 4.8% in the control group (P = 0.200). There was a higher incidence in elevation of CK-MB than normal baseline in the rosuvastatin (67.1% vs 59.2%, P = 0.701). There was no difference in major adverse event (0% in the rosuvastatin group vs 0.8% in control).