Treatment with hyperbaric O2 (HBO) ameliorates ischemia-reperfusion (I/R) injury. Since tumor necrosis factor-alpha (TNF-alpha) plays an important role in I/R injury, we hypothesized that the effect of HBO in I/R injury may be due to its ability to inhibit TNF-alpha production. In this study, one group of rats received HBO during 60 min of ischemia (HBO group, n = 9), while control rats endured the same procedure but did not receive HBO (non-HBO, n = 9). A group of sham-operated control rats (SHAM, n = 6) underwent laparotomy without occlusion of the artery and HBO treatment. Intestinal I/R led to an increase in serum TNF-alpha concentration to [mean (SEM)] 165 (32) pg/ml (P < 0.01 vs SHAM rats). HBO attenuated this increase [34 (9) pg/ml; P<0.05 vs non-HBO group]. Intestinal I/R also resulted in a marked increase in lung myeloperoxidase content [0.62 (0.04) U/g vs 0.17 (0.02) U/g of SHAM rats, P<0.01]. HBO suppressed this increase [0.40 (0.04) U/g, P<0.05 vs non-HBO rats]. HBO ameliorated the injury to the intestine and lung. The number of neutrophils sequestered in the lung was reduced in HBO rats compared to non-HBO rats [6.4 (0.9) neutrophils/per oil field and 10.9 (2) neutrophils/per oil field, respectively; P < 0.05]. These findings demonstrate that HBO inhibits TNF-alpha production during intestinal I/R, and this reduced TNF-alpha production may be attributed to the beneficial effects of HBO.

Hyperbaric O2 reduces intestinal ischemia-reperfusion-induced TNF-alpha production and lung neutrophil sequestration.

BOSCO, GERARDO;
2001

Abstract

Treatment with hyperbaric O2 (HBO) ameliorates ischemia-reperfusion (I/R) injury. Since tumor necrosis factor-alpha (TNF-alpha) plays an important role in I/R injury, we hypothesized that the effect of HBO in I/R injury may be due to its ability to inhibit TNF-alpha production. In this study, one group of rats received HBO during 60 min of ischemia (HBO group, n = 9), while control rats endured the same procedure but did not receive HBO (non-HBO, n = 9). A group of sham-operated control rats (SHAM, n = 6) underwent laparotomy without occlusion of the artery and HBO treatment. Intestinal I/R led to an increase in serum TNF-alpha concentration to [mean (SEM)] 165 (32) pg/ml (P < 0.01 vs SHAM rats). HBO attenuated this increase [34 (9) pg/ml; P<0.05 vs non-HBO group]. Intestinal I/R also resulted in a marked increase in lung myeloperoxidase content [0.62 (0.04) U/g vs 0.17 (0.02) U/g of SHAM rats, P<0.01]. HBO suppressed this increase [0.40 (0.04) U/g, P<0.05 vs non-HBO rats]. HBO ameliorated the injury to the intestine and lung. The number of neutrophils sequestered in the lung was reduced in HBO rats compared to non-HBO rats [6.4 (0.9) neutrophils/per oil field and 10.9 (2) neutrophils/per oil field, respectively; P < 0.05]. These findings demonstrate that HBO inhibits TNF-alpha production during intestinal I/R, and this reduced TNF-alpha production may be attributed to the beneficial effects of HBO.
2001
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2487478
Citazioni
  • ???jsp.display-item.citation.pmc??? 17
  • Scopus 61
  • ???jsp.display-item.citation.isi??? 51
  • OpenAlex ND
social impact