ABSTRACT
Objective To explore clinical value of tumor specific growth factors (TSGF) in serum and bronchoalveolar lavage fluid (BALF) on differential diagnosis of benign and malignant periphery solitary pulmonary nodules (PSPN). Methods Serum and BALF from both normal and afflicted side were collected from 211 patients with PSPN(case group) and from 196 patients without any type of tumor (control group). TSGF and carcinoembry-onic antigen (CEA) in serum and BALF were measured in both groups. Results In the malignant PSPN patients, CEA in serum, normal and afflicted side were 28.73 (SD: 15.61) μg/L,63.31 (SD:21.28) μg/L and 85.54(SD: 26.19)μg/L,respectively, which was significantly higher than that of the benign PSPN patients (7.21(SD:2.43) μg/L, 12.36(SD:6.93)μg/L and 14.65 (SD:8.07)μg/L,respectively), as well as that of the control group (4.68 (SD: 1.25) μ/L and 11.06(SD:8.03) μg/L in serum and BALF, respectively (P < 0.05). TSGF in the serum and BALF from the normal and afflicted side of malignant PSPN patients was 88.73 (SD:13.51)μg/L, 110.73 (SD: 18.64) μg/L and 162.80(SD:58.89) μg/L, respectively, which were significantly higher than that of the benign PSPN patients (56.31(SD: 2.43) μg/L, 79.25 [SD: 36.86] and 86.29 (SD: 37.07) μg/L, respectively) (P <0.05). Furthermore, in the malignant PSPN patients, TSGF and CEA in the afflicted side were significantly higher than that of the normal side. Sensitivity, specificity and accuracy of TSGF in BALF from the afflicted side for malig-nant diagnosis were 86.6%,100.0% and 98.6%,respectively,which was higher than that of CEA (70.2% ,78. 9% and 76.5% respectively) and that of serum TSGF (73.1% ,88.9% and 85.7% respectively). Conclusions TSGF in bronchoalveolar lavage fluid and serum has a significant role in differential diagnosis of benign and malig-nant periphery solitary pulmonary nodules. Furthermore, measurement of TSGF in bilateral BALF is helpful in diag-nosis of tumor location.
ABSTRACT
Eighteen adult rabbits were randomly divided into three groups: normal, control and experimental group. The model of global cerebral ischemia was produced by four-vessel occulsion. The cerebral temporal cortex samples were collected to determine volume of the water, LPO and Ca~(2+) concentration,SOD activity,and pathologic examinations of the cortex were made by optical and electronic microscope. The results showed that fructose-1, 6-diphosphate (FDP) reduced the water content and intracellular Ca~(2+)level, restrained the LPO production, enhanced the SOD activity of the brain. It is concluded that FDP protects cerebral biological membrane to a certain degree from ischemia and reperfusion injury.