Objective To study the effect of magnetic field on serum activity of superoxide dismutase (SOD), content of malon-dialdehyde (MDA)and content of nitric oxide (NO)in patients undergoing operation for pituitary Tumor. Methods Sixteen ASA Ⅰor Ⅱ patients undergoing pituitary tumor surgery under general anesthesia were randomly divided into 2 groups (n=8 each): magnetic field group (M) and control group (C). Patients in magnetic field group were exposed in 150 mT magnetic field during the operation period.Blood samples were taken from radial artery for determination of serum SOD,MAD and NO before induction of anesthesia(T_0, baseline),after induction(T_1),70 min after induction(exposed in magnetic field for 60 min) (T_2)and 130 min after induction (exposed in magnetic field for 120 min) (T_3). Results There was no significant difference between the two groups in age, sex (M/F ratio),body weight,body height,duration of operation and duration of anaesthesia.The serum activity of SOD and content of NO were significantly higher at T_3 in group M than that in group C,and the serum content of MDA was lower at T_3 in group M than that in group C. Conclusions The magnetic field not only increases serum SOD activity and the content of NO in patient undergoing operation for pituitary tumor,but also reduces the content of MDA in them.

Objective To observe the safety and efficacy of FOLFOX4 regiment in elderly versus young patients with advanced colorectal cancer. Methods There were 61 patients enrolled in this study, with 28 elderly patients aged 70 years and over, 33 young patients aged less than 70 years.They suffered from advanced/recurrent colorectal cancer and received FOLFOX4 regiment (Oxaliplatin +CF+5-FU). Every 14 days were as a cycle, and the therapeutic safety and efficacy were evaluated after three cycles. Adverse events and response to treatment were compared between the elderly and young patients. Results The main adverse effects were myelosuppression, gastrointestinal disturbance and neurotoxicity. The incidence rate of diarrhea was significantly higher in elderly patients than in young patients, but the most of diarrhea were at grade Ⅰ - Ⅱ. The incidence rates of leucocyte decrease and neutrophil decrease were higher in elderly patients than in young patients (92. 8% vs. 78. 8%, 39.3% vs. 36.3%), but there were no statistically significant differences between them. The incidence rate of neurotoxicity was 46.5% in elderly patients and 36.4% in young patients (P＞0. 05). The recent efficacy rate was 25%, disease control rate was 71.4% and median time-to-progression (TTP) was 6 months in elderly patients and 24.2%, 84.8% and 7 months in young patients (all P＞0.05). Conclusions FOLFOX4 regiment is well-tolerated and effective in both young and elderly patients.

ObjectiveTo investigate mutations in exons 19, 20 and 21 of epidermal growth factor receptor (EGFR) gene in elderly patients with non-small cell lung cancer (NSCLC). MethodsEGFR gene mutations in exons 19, 20 and 21 were detected by nested PCR amplification and DNA sequencing in 46 elderly patients with non-small cell lung cancer. The relationship between mutations and clinical characteristics of these patients was analyzed. ResultsEGFR gene mutations were found in 56.5% (26/46) patients and 41.3% (19/46)were non-silent mutations. Mutation of exon 19 was detected in 6 cases (13.0%), mutation of exon 20 in 13 cases(28.2%) and that of exon 21 in 14 cases (30.4%). Seven patients among them had double mutations and the rest only had a single mutation. The incidence of EGFR gene mutations was higher in non-smokers than in smokers(P＜ 0.01). Higher EGFR mutation rate in exon 19, 20 and 21 were found in patients with clinical benefit who were treated with tyrosine kinase inhibitor(TKl)(P＜0.05). There was no difference in EGFR mutation rate between 60～69 age group and 70～85 age group. ConclusionsThe data suggest that the characteristics of EGFR gene mutations in elderly patients with NSCLC is the same as in the general NSCLC patients. The forecast informations of TKI treatment can be obtained by gene detection in elderly NSCLC patients.

Objective To analyze and determine the efficient T- and B-combined (T/B) antigenic epitopes in Helicobacter pylori adhesin A. Methods Recombinant HpaA (rHpaA) was expressed for immunizing rabbit to generate antiserum. T- and B-cell epitopes in HpaA molecule were predicted by using bioinformatic technique. The segments to encode T/B combined epitope peptides were amplified by PCR and the phage display systems of T/B combined epitopes were subsequently constructed. PEG/NaCl precipitation method was applied to extract the recombinant phage PⅢ (rPⅢ) that displayed T/B combined epitopes. By using either commercial IgG against whole-cell of Helicobacter pylori or rHpaA antiserum as the primary antibody, the T/B combined epitopes displayed in rP Ⅲ s were screened and identified by Western blot and ELISA. MTT was applied to determine the proliferation of rHpaA-immunized mouse splenocytes after stimulation of the different recombinant rPⅢ proteins. Results In the HpaA molecule there were five T/B combined epitopes: HpaA10, HpaA37, HpaA79, HpaA116 and HpaA143. All the T/B combined epitopes were successfully displayed on the surface of PⅢ protein of phage M13. The results of Western blot, ELISA and MTT confirmed that HpaA116 was the predominant antigenic epitope, both HpaA37 and HpaA79 were the efficient antigenic epitopes. However, HpaA10 and HpaA143 were identified as ineffective antigenic epitopes. Conclusion The phage display systems of T/B combined epitope peptides of H. pylori adhesin A have been successfully generated in this study. HpaA37 and HpaA79, especially HpaA116 are the efficient T/B combined antigenic epitopes in HpaA of H. pylori.

Objective To discuss the clinical value of interventional management before surgical therapy for massive gastrointestinal hemorrhage, and to compare the clinical efficacy and re-bleeding rate between hypophysin infusion group and embolization group. Methods During the period of June 1998-Apr.2009, 31 patients with massive gastrointestinal hemorrhage in our institution underwent preoperative interventional managements before they received surgical treatment. According to DSA manifestations, the patients underwent trunsarterial hypophysin infusion or transcatheter embolization as interventional management. The clinical efficacy of interventional procedures and its influence on the surgery were evaluated, and the hemostasis rate and re-bleeding rate were compared the two kind of intervention managements. The numeration data were analyzed with Fisher's exact test, and the SPSS 11.0 was used as statistical software. Results The interventional managements were successfully performed in all the 31patients, with a total hemostasis rate of 83.9% (26/31) and a total re-bleeding rate 30.7% (8/26). The hemostasis rate and re-bleeding rate of hypephysin infusion group and embolization group were 69.2% (9/13), 94.4% (17/18) and 44.4% (4/9), 23.7% (4/17), respectively. All the 31 patients received surgery after interventional therapy, of which selective operation was carried out in 20. Neither surgery-related or intervention-related serious complications nor death occurred. Conclusion Preoperative interventional managements can provide patients with massive gastrointestinal hemorrhage with valuable chance of a successful surgery, enable the physician to take a selective operation to replace an emergency one, as a result, the surgical risk will be greatly reduced. Therefore, it is worth popularizing the preoperative interventional managements in clinical practice.

BACKGROUNDTo summarize the preliminary experience on Iressa for refractory non-small cell lung cancer (NSCLC).

METHODSFifty-five patients with NSCLC, who failed after surgery, radiotherapy, chemotherapy or combination of the above modalities, were registered in this clinical trail. Prior to Iressa, 50 patients were in stage IV, and 5 in stage III. Iressa was administered orally at 250 mg, once a day until cancer progressed or severe toxicity occured, which made patients intolerable. The median time for administration of Iressa was 4 months.

RESULTSThe toxicity of Iressa was tolerable with 47% of skin toxicity (rash) and 2%-7% of diarrhea, nausea, orally mucosal ulceration and alopecia. Overall response rate was 20%. Different sites of distant metastases responded to Iressa in different ways with higher response rate for pulmonary disseminations. One quarter of patients felt improvement of their symptoms over 2 weeks. Median survival time for entire group was 5 months (1-17 months). Median time to progression (TTP) was 3.6 months. Survival at 6 months was 67%. Prognostic predictor, which could imply the outcome, was skin toxicity with higher response rate and longer survival time ( P < 0.05), and no relationship with sex, histological types of NSCLC and distant metastasis had been found.

CONCLUSIONSIressa could be tolerated by refractory NSCLC patients with acceptable side-effects, and have palliative effects.

Objective To establish a mini pig model suitable for interventional studies in vivo. Methods The endothelia of unilateral renal arteries in 8 purebred Chinese experimental mini pigs(CEMP)was denuded by inflated balloons after the animals were fed with high cholesterol diet for 13 weeks.The CEMP were fed with h high cholesterol diet continuously till the 40th week.The levels of blood lipid panel and creatinine were tested at week 1,14 and 40.Bilateral renal arteries were examined with intravascular uhrasonography at week 14 and 40.The vessel samples were collected at week 40 and stained with haematoxylin-eosin,Masson trichrome technique, oil O and anti-macrophage immunohistological technique. Results Significant differences of blood lipid panel and creatinine were found between week 1 and week 40.Focal ischemic renal injury could be observed pathologically.Renal arteries of CEMP were suitable for interventional procedure such as angiography and intravascular ultrasonography.Cross-sectional information of vessels could be provided clearly by intravascular ultrasonography and the intimamedian thickness of injured renal arteries was much thicker than that of non-injured ones[(0.89±0.03)mm vs (0.30±0.02)mm,P＜0.05]as evidenced by this diagnostic technique.Pathological findings demonstrated the atheroselerotic profiles of the injured renal arteries.Fibrous and fibro-fatty plaques were the main pathologic types in this CEMP model. Conclusions An animal model with renal arterial atherosclerosis mimicking the progression of atheroselerotic renovaseular disease,which is suitable for interventional procedure is established successfully.Intravascular ultasonography may have potential clinical prospect on the evaluation of atherosclerotic renovaseular disease.

ObjectiveTo investigate the protective effect of Zuoguiwan against ⁶⁰Co-γ ray-induced premature aging of rats based on the phosphatidylinositol-3-kinases/protein kinase B/mammalian target of rapamycin （PI3K/Akt/mTOR） signaling pathway. MethodSixty sexually mature female SD rats were irradiated with ⁶⁰Co-γ rays （6.0 Gy， LD₄₀） for 24 h at one time. Then they were randomized into model group， Bujiale group （0.18 g·kg^-1·d^-1）， Bujiale （0.09 g·kg^-1·d^-1） + high-dose Zuoguiwan group （23.625 g·kg^-1·d^-1）， high-dose Zuoguiwan group （23.625 g·kg^-1·d^-1）， medium-dose Zuoguiwan group （9.45 g·kg^-1·d^-1）， and low-dose Zuoguiwan group （4.725 g·kg^-1·d^-1）. The administration （once a day） lasted 21 days. Serum indexes ［follicle-stimulating hormone （FSH）， luteinizing hormone （LH）， and estradiol （E₂）］ of rats were detected by enzyme-linked immunosorbent assay （ELISA）， and morphological changes of ovarian tissues were observed based on hematoxylin and eosin （HE） staining. The apoptosis rate of granulosa cells was detected by terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling （TUNEL） and the protein expression of phosphorylated （p）-PI3K， p-Akt， p-mTOR， B-cell lymphoma-2 （Bcl-2）， and Bcl-2-associated X protein （Bax） in ovarian tissues by Western blot. ResultCompared with normal group， model group demonstrated increase in serum FSH （P<0.01）， decrease in E₂ （P<0.05）， and reduction of follicles and luteum in early ovary （P<0.01）. Moreover， the elevation of apoptosis rate of granulosa cells （P<0.01）， down-regulation of p-PI3K， p-Akt， p-mTOR， and Bcl-2 in ovarian tissue， and increase in expression of Bax were also observed in the model group as compared with the normal group （P<0.01）. In comparison with the model group， the administration groups showed rise of the number of early ovarian follicles， decrease in the apoptosis rate of granulosa cells， increase in the expression of p-PI3K， p-Akt， p-mTOR， and Bcl-2， and down-regulation of Bax， particularly the Bujiale + high-dose Zuoguiwan group（P<0.05，P<0.01）. ConclusionZuoguiwan protects radiation-damaged ovary by activating the expression of PI3K/Akt/mTOR protein in ovarian tissue， increasing Bcl-2， and inhibiting the expression of Bax.

As a noninvasive neuromodulation technique, transcranial magnetic stimulation (TMS) is widely used in the clinical treatment of neurological and psychiatric diseases, but the mechanism of its action is still unclear. The purpose of this paper is to investigate the effects of different frequencies of magnetic stimulation (MS) on neuronal excitability and voltage-gated potassium channels in the
Action Potentials ; Animals ; Magnetic Phenomena ; Mental Disorders ; Mice ; Neurons ; Patch-Clamp Techniques ; Potassium Channels, Voltage-Gated

BACKGROUND: Lung cancer has been the leading cause of cancer-related deaths worldwide for many years. This study aimed to investigate the global patterns and trends of lung cancer. METHODS: Lung cancer incidence and mortality were derived from the GLOBOCAN 2020 database. Continuous data from Cancer Incidence in Five Continents Time Trends were used to analyze the temporal trends from 2000 to 2012 using Joinpoint regression, and average annual percent changes were calculated. The association between the Human Development Index and lung cancer incidence and mortality was assessed by linear regression. RESULTS: An estimated 2.2 million new lung cancer cases and 1.8 million lung cancer-related deaths occurred in 2020. The age-standardized incidence rate (ASIR) ranged from 36.8 per 100,000 in Demark to 5.9 per 100,000 in Mexico. The age-standardized mortality rate (ASMR) varied from 32.8 per 100,000 in Poland to 4.9 per 100,000 in Mexico. Both ASIR and ASMR were approximately twice higher in men than in women. The ASIR of lung cancer showed a downward trend in the United States of America (USA) between 2000 and 2012, and was more prominent in men. The age-specific incidence rates of lung cancer for ages of 50 to 59 years showed an upward trend in China for both men and women. CONCLUSIONS The burden of lung cancer is still unsatisfactory, especially in developing countries like China. Considering the effectiveness of tobacco control and screening in developed countries, such as the USA, there is a need to strengthen health education, accelerate the establishment of tobacco control policies and regulations, and improve early cancer screening awareness to reduce the future burden of lung cancer.
Male ; Humans ; Female ; United States ; Middle Aged ; Incidence ; Lung Neoplasms/epidemiology* ; Linear Models ; China/epidemiology*