[Protective effects of acidic fibroblast growth factor on intestinal ischemia/reperfusion in rats].

OBJECTIVE: To observe the change in hepatic and renal functions, change in the plasma D-lactate level, and the expression of proliferating cell nuclear antigen (PCNA) after intestinal I/R injury, so as to explore the effects of reconstructive human acid fibroblast growth factor(aFGF) on intestinal I/R injury in rats. METHODS: One hundred and twenty-six Wistar rats were divided into sham-operated, ischemia (45 minutes) plus reperfusion, reconstructive human aFGF treatment (2, 4, 8 microg aFGF) and wild type aFGF(2, 6, 12, and 24 hours, respectively) groups. Hepatic and renal functions and the levels of plasma D-lactate were determined and the expression of PCNA was assessed. RESULTS: Compared with all other groups, bowel barrier function and hepatic and renal functions showed most marked deterioration in sham-operated group. The damages were less marked in reconstructive human aFGF group compared with other groups 24 hours after ischemia/reperfusion of the intestine, and the protective effect was best shown when 4 microg of aFGF was given. The trend of expression of PCNA was similar to that of changes in D-lactate level. CONCLUSION: Wild type reconstructive human aFGF treatment significantly improves the outcome of ischemia/reperfusion injury to the intestine, and the effect is dose-dependent.

[Protective effects of modified recombinant human acidic fibroblast growth factor on small intestine after ischemia/reperfusion injury in rats].

OBJECTIVE: To explore the protective effect of modified recombinant human acidic fibroblast growth factor (rhaFGF) on small intestinal after ischemia/reperfusion (I/R) injury in rats. METHODS: The clamp on the superior mesenteric artery (SMA) was removed after clamping it for 45 minutes to replicate I/R injury of the intestine in the rat. Rats were then divided randomly into sham operation group, normal saline treatment group and rhaFGF treatment group, in which the rats of the normal saline treatment group were injected 0.1 ml of normal saline and that of the rhaFGF group were given 4 microg of rhaFGF immediately after reperfusion. The content of D-lactate in the plasma was determined and the changes in intestinal pathology were observed. At the same time, the rates of apoptosis of intestinal epithelial cells were assessed 2, 6, 12 and 24 hours after I/R, and compared to the sham operation group. RESULTS: The plasma content of D-lactate in the saline treatment group at 6 hours after I/R reached (0.34+/-0.09) mg/L and was significantly higher than that in the rhaFGF treatment group((0.23+/-0.07)mg/L, P<0.05). It was shown histologically that the intestinal structures were damaged more seriously in saline treatment group than in rhaFGF group. The apoptosis rates in the saline treatment group and rhaFGF group were elevated significantly, peaking at 12 hours after I/R injury((62.8+/-1.7)% in saline group and (42.5+/-2.6)% in rhaFGF treatment group), then the rate began to fall. There was statistically significant difference between the two groups at 12 hours after I/R injury. CONCLUSION: rhaFGF can reduce content of D-lactate in the plasma and rate of apoptosis of epithelial cells in the intestine after I/R injury, thus it seems to afford a protective effect on the small intestine after I/R injury in rats.

[Effects of acidi fibroblast growth factor on hepatic and renal functions after intestinal ischemia/reperfusion injury].

OBJECTIVE: To investigate the change in hepatic and renal functions parameters after intestinal ischemia-reperfusion (I/R) injury, and to explore the effects of acidic fibroblast growth factor (aFGF) on hepatic and renal functions after intestinal I/R injury in rats. METHODS: Seventy-eight Wistar rats were divided into four groups, which are sham-operated (C) group, ischemia (45 minutes) plus reperfusion (R), reconstructive human aFGF treatment (rhF), and wild type aFGF treatment (wtF) groups. The animals were sacrificed at 2, 6, 12 and 24 hours, respectively. Hepatic and renal functions were analyzed. RESULTS: In comparison with those in group C, the hepatic and renal functions were damaged in group R, rhF and wtF decreased. Treatment with rhF and wtF markedly abated the hepatic and renal dysfunction. The desquamation of intestine villi and infiltration of inflammation cells in the submucosa were observed in all groups. CONCLUSION: Hepatic and renal functions are damaged after intestinal I/R injury. Treatment with rhF and wtF could protect against multiple organ dysfunction associated with intestinal ischemia-reperfusiun injury.

[Effects of reconstructive human acidic fibroblast growth factor and wild type acidic fibroblast growth factor on skin cell proliferation].

OBJECTIVE: To investigate the effects of reconstructive human acidic fibroblast growth factor (aFGF) and wild type aFGF on skin cell proliferation in rat. METHODS: Neonatal rat skin (area of 2 mmx2 mm) was cultured in Dulbecco's modification of Eagle's medium containing reconstructive human aFGF and wild type aFGF, respectively. The concentrations of aFGF were 1 microg/L, 10 microg/L, and 100 microg/L. After being cultured for 4 days, the area of skin was measured. RESULTS: After treatment with two different growth factors in three different concentrations (1 microg/L, 10 microg/L and 100 microg/L) for 4 days, the areas of skin in three reconstructive human aFGF groups were 1.4, 1.5 and 1.3 fold of that of control, respectively and the areas of three wild type aFGF groups were 1.5, 3.2 and 1.6 fold of that of control, respectively, while the area of skin in the control group was (2.96+/-1.12) mm(2). In comparison with those of other groups, the skin area of 10 microg/L wild type aFGF group was significantly increased (P<0.05). CONCLUSION: Reconstructive human aFGF confers less impact on cutaneous cell growth. The capability of wild type aFGF to induce cutaneous cell proliferation is much greater than that of reconstructive human aFGF.