AIM: To explore the feasibility of culturing human umbilical vein endothelial cells ( HUVEC ) on acellular corneal stroma and performing the posterior lamellar endothelial keratoplasty ( PLEK ) treating corneal endothelial decompensation.
METHODS: Thirty New-Zealand rabbits were divided into three groups randomly, 10 rabbits for experimental group, 10 for stroma group and 10 for control group. Corneal endothelial cells were removed to establish animal model of corneal endothelial failure. PLEK was performed on the rabbits of experimental group and stroma group, and nothing was transplantated onto the rabbits of control group with the deep layer excised only. Postoperative observation was taken for 3mo. The degree of corneal edema and central corneal thickness were recorded for statistical analysis.
RESULTS:Corneas in experimental group were relieved in edema obviously compared with that in stroma group and the control group, and showed increased transparency 7d after the operation. The average density of endothelial cells was 2 026. 4±129. 3cells/mm2 , and average central corneal thickness was 505. 2±25. 4μm in experimental group, while 1 535. 6±114. 5μm in stroma group and 1 493. 5±70. 2μm in control group 3mo after operation.
CONCLUSION:We achieved preliminary success in our study that culturing HUVEC on acellular corneal stroma and performing PLEK for corneal endothelial decompensation. HUVEC transplanted could survive in vivo, and have normal biological function of keeping cornea transparent. This study provides a new idea and a new way clinically for the treatment of corneal endothelial diseases.

Biomarkers, Tumor ; metabolism ; Carcinoma, Papillary ; metabolism ; Cathepsin B ; metabolism ; Cell Cycle Proteins ; metabolism ; HSP27 Heat-Shock Proteins ; metabolism ; Humans ; Proteomics ; Repressor Proteins ; metabolism ; S100 Calcium Binding Protein A6 ; S100 Proteins ; metabolism ; Serpins ; metabolism ; Thyroid Neoplasms ; metabolism

Objective To investigate the clinical significance of serum pepsinogen (PG) in gastric cancer screening. Methods The clinical data of 930 patients underwent colonoscopy were retrospectively analyzed. Among them, non chronic atrophic gastritis was in 550 cases (chronic atrophic gastritis group), chronic atrophic gastritis in 300 cases (chronic atrophic gastritis group), gastric cancer in 80 cases (gastric cancer group). The patients in chronic atrophic gastritis group were divided into mild chronic atrophic gastritis subgroup (100 cases), moderate chronic atrophic gastritis subgroup (120 cases) and severe chronic atrophic gastritis subgroup (80 cases) according to the severity of the atrophy. The levels of serum PGⅠand PGⅡwere detected by enzyme linked immunosorbent assay (ELISA) method, and the ratio of PGⅠand PGⅡ(PGR) was calculated. Results There was no statistical difference in PGⅡ among the 3 groups (F = 1.226, P>0.05). The PG Ⅰand PGR in gastric cancer group were significantly lower than those in chronic atrophic gastritis and non chronic atrophic gastritis:(70.41 ± 39.42)μg/L vs. (83.10 ± 30.08) and (165.5 ± 41.40)μg/L, 3.76 ± 2.03 vs. 5.08 ± 1.82 and 6.84 ± 1.88, those in chronic atrophic gastritis were significantly lower than those in non chronic atrophic gastritis group, there were statistical differences (P<0.05). The PG Ⅰand PGR in mild and moderate chronic atrophic gastritis subgroup were significantly higher than those in severe chronic atrophic gastritis subgroup and gastric cancer group:(95.50 ± 30.80) and (82.10 ± 31.42)μg/L vs. (70.12 ± 20.12) and (70.41 ± 39.42) μg/L, 5.84 ± 2.88 and 5.08 ± 1.89 vs. 3.90 ± 2.78 and 3.76 ± 2.03, there were statistical differences (P<0.05), but there was no statistical difference between severe chronic atrophic gastritis subgroup and gastric cancer group (P>0.05), and there was no statistical difference between mild chronic atrophic gastritis subgroup and moderate chronic atrophic gastritis subgroup (P>0.05). The receiver operating characteristic (ROC) curve was used, the optimal critical value of PG Ⅰ was 74.8μg/L, the area under curve (AUC) was 0.842, the sensitivity was 90%, specificity was 75%;the optimal critical value of PGR was 4.46, AUC was 0.837, the sensitivity was 75%, specificity was 82%;the AUC of combined detection of PG Ⅰ and PGR was 0.906, the sensitivity was 88%, specificity was 85%. Conclusions Detection of PG Ⅰ combined with PGR can be used as gastric cancer screening, the recommended level of PGⅠ≤74.80μg/L and PGR≤4.46.

Objective To investigate the diagnostic value of serum homocysteine in the diagnosis of colon cancer.Methods The performance rate method was used to detect the level of serum homocysteine(Hcy) in colon cancer group(50 cases) who were treated in Beijing Tiantan Hospital Affiliated to Capital Medical University from March 2011 to June 2016 and control group(50 cases).The expression of independent samples t test was used to analysis of the difference of the Hcy levels between the two groups.The ROC curve was used to evaluate the value of Hcy in diagnosis of colon cancer.Results The serum Hcy level in colon cancer group was (18.6±8.9) μmol/L,in healthy control group was (10.7±4.3) μmol/L,colon cancer group serum Hcy levels were significantly higher than those of healthy control group,there was significant difference(t=5.627,P<0.01).AUC of ROC curve was 0.775,cut-off value of 18.5 μmol/L,sensitivity was 0.50,specificity was 0.94,95%CI was 0.682-0.868(P<0.01).Conclusion Serum Hcy can be used as a reference index of the diagnosis of colon cancer.

The RAS (rat sarcoma) gene is one of the important oncogenes, and its mutation is present in about 30% human tumors. KRAS (kirsten rat sarcoma viral oncogene) is one of the three RAS subtypes, and KRAS mutations are more common than the mutations in other two RAS subtypes. In recent years, with the continuous research, new ideas have been provided for the treatment of cancers via targeting-KRAS. Efforts have been made to develop various KRAS inhibitors. Here, based on the mechanism of action, we classified KRAS inhibitors into two categories: inhibitors that directly target KRAS and inhibitors that indirectly act on KRAS. The representative KRAS inhibitors were summarized and introduced in this paper.

Carcinoma in Situ ; epidemiology ; etiology ; pathology ; Carcinoma, Squamous Cell ; pathology ; surgery ; Disease Progression ; Female ; Humans ; Lichen Sclerosus et Atrophicus ; epidemiology ; etiology ; pathology ; Prevalence ; Vulvar Neoplasms ; epidemiology ; etiology ; pathology

Objective To compare and analyze different factors that influence hypertension between subjects with and without gout, and to recognize and understand them further. Methods A total of 7395 patients ( 6935 males and 460 females) from the gout clinic of Affiliated Hospital of Qingdao University between May 2009 and January 2016 were chosen as gout group, while 8379 people without gout (7858 males and 521 females) were served as control group. The height, weight, waist circumference, hip circumference, blood pressure, fasting plasma glucose ( FPG) , triglyceride(TG), cholesterol(TC), blood urea nitrogen (BUN), creatinine(Cr), and uric acid (UA) of both groups were monitored. Clinical and biochemical differences of the two groups were analyzed. The morbidity rate of hypertension in the two groups was also compared. According to different criteria, the subjects were divided into several subgroups. The data were analyzed mainly by Empower statistical software. Results The risk ratio of hypertension in gout group was 63. 25%, and it was higher than that in control group(49. 19%,x2=316. 25,P<0. 01). The risk ratio of hypertension in gout group was 1. 173 times higher than that in control group. After adjusting UA, it would drop to 1. 065 times, but the difference still remained significant. In groups with diabetes, hyperlipidemia, hypercholesterolemia, obesity, the risk ratio of hypertension increased by 13. 7%, 15. 3%, 21. 8%, and 23. 6% respectively, in gout group. FPG, TG, TC, BMI, and WHR were all associated with HP in both gout and normal groups, but Cr was associated with HP in gout group only(OR=1. 396, 95%CI 1. 197-1. 629). Age had different saturation effects in two groups. Conclusion The factors influence hypertension differently in patients with and without gout, especially those of gout itself and creatinine. The precision medicine should be applied.

OBJECTIVE: To investigate the effect of eating on pharmacokinetics of ethanesulfonic acid levofloxacin tablets.METHODS: The blood concentration of 10 healthy male subjects were determined by HPLC after receiving single oral dose of 200mg ethanesulfonic acid levofloxacin both before and after eating by randomized crossover way.The data processing was conducted with 3p97 software so as to figure out the pharmacokinetic parameters.RESULTS: The plasma concentration-time curves of the subjects after administration of drugs were in conformity with two-compartment model.The respective main pharmacokinetic parameters of the eating group and the empty stomach group were as follows: Cmax were (1.91?0.36)mg/L and(2.16?0.69) mg/L; AUC0～t were (14.14?2.32)(mg?h)/L and(14.40?3.11)(mg?h)/L; t1/2? were(6.59?1.66)h and(6.94?0.81 )h.CONCLUSION: Neither eating nor empty stomach has effect on the pharmacokinetics of ethanesulfonic acid levofloxacin tablets.

Objective To explore the clinical significance of adenosine deaminase ( ADA) in pleural ef-fusion for diagnosis of tuberculosis pleuritis in children. Methods The level of ADA in pleural effusion was ret-rospectively analyzed in 28 cases with purulent pleuritis,thirty-four cases with mycoplasma pneumoniae pleuri-tis,forty-five cases with tuberculosis pleuritis from July 2011 to January 2014 in Beijing Children′s Hospital Af-filiated to Capital Medical University. Results The level of ADA in three groups was expressed by median (range interquartile). ADA in the purulent pleuritis group [126. 35 (76. 80,178. 13)U/L]was higher than the group of mycoplasma pneumoniae pleuritis [ 55. 55 ( 42. 80, 79. 03 ) U/L ] and tuberculosis pleuritis [ 26. 50 (22. 05,50. 95)U/L]. The difference was statistically significant (P< 0. 01). The cut-off value of pleural effu-sion ADA for diagnosis of tuberculosis pleuritis is not available by application of ROC curve. Conclusion Higher ADA value is not only the characteristic of tuberculosis pleuritis,but also purulent pleuritis and mycoplas-ma pneumoniae pleuritis. ADA has no clinical value in diagnosis of tuberculosis pleuritis in children.

Objective To explore the clinical outcome of vascularized iliac bone flap combined with tantalum rod implantation for the treatment of osteonecrosis of the femoral head (ONFH).Methods Totally 28 cases (36 hips) of non traumatic avascular necrosis of the femoral head patients from January 2010 to January 2011,which were 15 males and 13 females; a mean age of 40 years (ranged,18-53years),according to ARCO stages:eight hips of stage Ⅱ a,ten hips of stage Ⅱ b,nine hips of stage Ⅲ a,nine hips of stage Ⅲ b,adopt to vascularized iliac grafting combined with tantalum rod Implantation for osteonecrosis of the femoral head.The Harris hip score and VAS score of pre-and post-operation was recorded to evaluate the clinical outcome,and to compare observe and analyze the change of postoperative of patients by used three-dimensional gait.Results All 28 cases (36 hips) were followed up 6 ～20 months,averaged 12 months.The results of Harris hip score and VAS score of the 6 months postoperatively and last follow-up were significantly higher than preoperative ones (P ＜0.05).And the Harris hip score of the last follow-up was also significantly higher than the one of 6 months postoperatively (P ＜ 0.05).However,there was no significant different in that of VAS score (P ＞0.05).There were 13 cases in excellent,fourteen in good and 4 in fair with an excellent and good rate of 89.8％,which shows that the extension of time and changes in patients gait tends to normal by three-dimensional gait analysis.Conclusion Vascularized iliac bone flap transplantation combined with tantalum screw was an effective method with high clinical success rate for treatment of younger patients with early-mid stage ONFH.It provided good blood supply and enough mechanical support to reduce the progress of femoral head collapse.