ABSTRACT
Objective:To investigate the value of serum gastrin-17 (G-17), pepsinogen (PG) I and II, and narrow-band imaging endoscopy in combination for identifying early gastric cancer.Methods:A total of 86 patients with suspected gastric cancer admitted to Zhoushan Hospital from January to September 2021 were included in this study. These patients underwent serum G-17, PG I, and PG II examination and narrow-band imaging endoscopy. PG I/PG II ratio (PGR) was calculated. Taking pathological results as a gold standard, the sensitivity, specificity, and accuracy of serum G-17, PG I, PG II, and narrow-band imaging endoscopy in combination for identifying early gastric cancer were calculated.Results:Serum G-17 level and PGR in the gastric cancer group were (20.14 ± 4.59) pmol/L and (20.21 ± 4.50) μg/L, respectively, which were significantly higher than (17.06 ± 4.05) pmol/L and (17.15 ± 4.08) μg/L in the atrophic gastritis group ( q = 4.12, 3.77, both P < 0.05) and (12.35 ± 3.31) pmol/L and (10.82 ± 5.26) μg/L in the non-atrophic gastritis group ( q = 9.34, 10.39, both P < 0.05). PG I and PGR in the gastric cancer group were (63.90 ± 14.41) μg/L and (3.17 ± 2.08), respectively, which were significantly lower than (79.34 ± 16.25) μg/L and (5.04 ± 3.61) in the atrophic gastritis group ( q = 5.33, 3.44, both P < 0.05) and (106.42 ± 20.18) μg/L and (9.22 ± 4.06) in the non-atrophic gastritis group ( q = 13.16, 9.97, both P < 0.05). Among the 86 patients included, gastric cancer was determined by biopsy in 43 patients. Pathological results showed that 37 patients had early gastric cancer and 6 patients had gastric cancer involving the muscle layer or serous layer. Narrow-band imaging endoscopy results showed that 83.78% (31/37) of patients had early gastric cancer. Serum G-17, PG, and narrow-band imaging endoscopy in combination showed that 91.89% (34/37) of patients had early gastric cancer. Taking pathological results as a gold standard, the sensitivity, specificity, positive predictive value, and negative predictive value of serum G-17 combined with PG for screening early gastric cancer were 72.97% (27/37), 77.55% (38/49), 71.05% (27/38), and 79.17% (38/48), respectively. The sensitivity, specificity, positive predictive value, and negative predictive value of narrow-band imaging endoscopy for screening early gastric cancer were 83.78% (31/37), 85.71% (42/49), 83.10% (31/38), and 87.50% (42/48). The sensitivity and specificity of serum G-17, PG, and narrow-band imaging endoscopy in combination for screening early gastric cancer were 91.89% (34/37) and 91.84% (45/49), respectively. Conclusion:Serum G-17, pepsinogen, and narrow-band imaging endoscopy in combination can improve the diagnostic accuracy of early gastric cancer and is an effective method for screening early gastric cancer.
ABSTRACT
Objective To explore the role of glucose-regulated protein 78 (GRP78),p38 mitogen-activated protein kinase(p38MAPK) signal pathway in seizure-reduced brain injures and the regulatory effect of Nimodipine on it.Methods Sprague-Dawley(SD) rats were randomly divided into status convulsion group (SC group),Nimodipine group(NM group),and a normal control group(NC group).The expressions of GRP78/Bip and p38MAPK mRNA and protein were detected by reverse transcription(RT)-PCR and immunohistochemistry.The expression of apoptosis cells was observed by TdT-mediated dUTP nick end labeling (TUNEL).Results (1) Immunohistochemistry:at 4 h after induction of status convulsion,the expression of GRP78 protein in the hippocampus CA1 domain began increasing slightly,and reached a maximum at 24 h,and then began decreasing slowly ; at 4 h after induction of status convulsion,the expression of p38MAPK protein in the hippocampus CA1 domain began increasing,and reached a maximum at 24 h,and decreased remarkably at 48 h.(2) RT-PCR:at 4 h after induction of status convulsion,the expression of GRP78 protein in the hippocampus CA1 domain began increasing slightly,and reached a maximum at 24 h,and then began decreasing slowly.The NM group was much higher than the SC group and the NC group(all P ＜ 0.05) ; at 4 h after induction of status convulsion,the expression of p38MAPK protein in the hippocampus CA1 domain began increasing,and reached a maximum at 24 h,and decreased remarkably at 48 h;the NM group was much lower than the SC group,and higher than the NC group (all P ＜ 0.05).(3) TUNEL:at 4 h after induction of status convulsion,the expression of the TUNEL positive cells in the hippocampus CA1 domain began increasing slightly,and reached a maximum at 48 h,and then began decreasing,and there was no difference between SC group and NC group;the NM group was much lower than the SC group(all P ＜ 0.05).Conclusions The correlation of the increased expression of p38MAPK and neuronal apoptosis indicates that GRP78 signal pathway may be mediated to cell apoptosis through p38MAPK.Nimodipine can affect the expression of GRP78/Bip and p38MAPK,and relieve endoplasmic reticulum stress,and lessen the pathologic damage to the hippocampus.