Colonic Polyps ; genetics ; pathology ; Colorectal Neoplasms ; genetics ; pathology ; CpG Islands ; DNA Methylation ; Genes, APC ; Genes, ras ; Humans ; Intestinal Polyps ; genetics ; pathology ; Microsatellite Repeats ; Mucin-2 ; Mucins ; analysis ; Mutation

Objective To study the effects of hydrogen dioxide (oxygen free radical donator) and vitamin C (oxygen free radical scavenger) on the electric current of large conductance calcium -activated potassium channels (BKCa channels) in isolated outer hair cells in aging guinea pigs .Methods Acute enzyme was used to isolat outer hair cells of aging guinea pigs ,in which of BKCa channel's electric current was observed and recorded by whole-cell recording mode of patch -clamp .After recording the stable and normal electric current of BKCa channels ,added H2 O2 dilution (0 .2 mmol/L) 40 μl in the 2 ml chambers within freshly isolated outer hair cells so that the concen‐tration of H2 O2 in the balneum would be 4 μmol /L .The groups(n=5) received individually vitamin C solution (5 mg/ml) 0 ,10 ,20 ,40μl in the 2 ml chambers within freshly isolated outer hair cells so that the concentration of vi‐tamin C in the balneum would be 0 ,25 ,50 ,100 μg /ml ,observing and recording the effects of different concentration of vitamin C to electric current of BKCa channels .Results ①In the w hole-cell mode of patch -clamp ,the rapid activation and non-deactivation electric current with a string of large amplitude was recorded ,above -40~ -30 mV activation voltage .The electric current increased with the increasing membrane potential .The amplitude in‐creased continuously and performed characteristics of outward rectification .When the concentration of IbTX was 100 nmol /L ,the activity of the channel was completely blocked and confirmed BKCa channel's electric current .②Medication within three minutes ,when VT was +50 mV ,the BKCa channels'the maximum peak current densities of 4 μmol /L H2 O2 group rose from 22 .09 ± 0 .27 PA /PF to 43 .53 ± 1 .09 PA/PF ,amplification was 97 .06% .In H2 O2 4 μmol /L + vitamin C with different concentrations as 25 ,50 ,100 μg/ml groups ,the BKCa channels'elec‐tric current performed about concentration-dependent inhibition ,and electric current's amplitude and peak current density decreased with the increasing concentration of vitamin C ,the I-V curves were reduced .However ,this still could not be recovered to the normal levels .Conclusion The oxygen free radical /BKCa exists in the process .The vitamin C as oxygen free radical scavenger can reverse the process to a large extent .

OBJECTIVE:To explore the role of clinical pharmacists participating in the prevention and treatment of sotalol-in-duced QT prolongation in aged patient with heart failure. METHODS:Clinical pharmacists participated in the treatment for a aged patient with heart failure,and assisted physicians to identify and assess the risk of sotalol-induced QT prolongation. According to the clinical symptoms and laboratory indexes,it was suggested to continue to use sotalol for antiarrhythmic,adjust the hepatoprotec-tive drug,given pharmaceutical care of ECG,electrolyte level monitoring,drug education and so on. RESULTS:Physicians adopt-ed the suggestions of clinical pharmacists to relive the illness without malignant arrhythmia and discharged after 11 d. CONCLU-SIONS:The patient with heart failure should be dominated by improving cardiac function and maintaining hemodynamic stability;combined with related guidelines and documentation,clinical pharmacists can assist physicians to identify the drug that induced QT prolongation,asses the risk of torsades de pointes ventricular tachycardia and other bad consequences,develop and optimize the regimen and strengthen pharmaceutical care to ensure the safe and effective treatment.

OBJECTIVE: lo discuss the inmtluence of different thyroidectomy on perioperative blood calcium concentration. METHOD: Total number of patients was 240. These patients of thyroid tumors were recruited. Clinical and follow-up datum were retrospective analyzed. RESULT: Patients were divided into four groups by different operative methods. Group one was patients taken one-side thyroidectomy, group two taken one-side lymph node dissection plus, group three taken two-sides thyroidectomy,and group four taken one or two sides lymph node dissection plus. Group two was easier to become hypocalcemia and their calcium concentration decreased more remarkably, compared with group one. Patients taken two-sides thyroidectomy had the familiar outcome. CONCLUSION Patients taken lymph node dissection were easier to become hypocalcemia, compared with patients only taken thyroidectomy.
Calcium ; blood ; Humans ; Hypocalcemia ; etiology ; Lymph Node Excision ; Neoplasm Recurrence, Local ; Retrospective Studies ; Thyroid Neoplasms ; Thyroidectomy ; adverse effects

ObjectiveTo study the efficacy and safety of early endoscopic retrograde cholangiopancreatography(ERCP) and endoscopic sphincterotomy (EST) for patients with acute biliary pancreatitis.Methods420 patients who were admitted to our hospital for management of acute biliary pancreatitis were divided into early endoscopic therapy group (n=218 patients) and conservative therapy group (n=202 patients).The durations for complete disappearance of abdominal pain,decrease in serum and urine amylase levels to normal,liver function recovery time,white blood cell recovery time,and the mean duration and costs of hospitalizations were analyzed.ResultsIn the ERCP group,all patients received EST.The stones in 172 patients with choledocholithiasis were removed with dormia baskets or balloon catheters.In 20 patients with severe acute biliary pancreatitis,endoscopic pancreatic duct stents were inserted for drainage.The durations of complete disappearance of abdominal pain,decrease of serum and urine amylase values to normal,white blood cell recovery time,liver function recovery time,cost of hospitalization and duration of hospitalization were significantly shorter in the early ERCP group than the control group.The mortalities in the ERCP and the control groups were 8.0％ and 22.2％,respectively.Conclusions Early endoscopic management for patients with acute biliary pancreatitis was not only safe and efficacious,but the management helped to identify the underlying causes of pancreatitis and reduced the duration of hospital stay and expenses.

Hypoxia occurs in chronic and acute vascular diseases and tumor formation. The ability of tumor cells to maintain a balance between an adaptation to hypoxia and cell death is regulated by a family of transcription factors called hypoxia-inducible factor 1 (HIF-1). Tumor hypoxia mediated by HIF-1 would facilitate the likelihood of resistance to chemotherapy and radiotherapy, proliferation, metastasis and the invasive potential; all of which culminate in a decrease in patient survival. And HIF-1 alpha subunit decides the activity of HIF-1, which is regulated by oxygen. So understanding the role of HIF in signal pathway, drug resistance mechanism and its feature is crucial for developing novel anticancer therapies. In recent years, more attentions have focused on HIF-1 alpha inhibitors. It is expected that development of more potent and selective HIF inhibitors will provide an effective treatment of cancer and other HIF-related diseases. So we will focus on the biological characteristics and mechanism of HIF-1 to review currently studied HIF-1 inhibitors.

Hypoxia is a general characteristic of most solid malignancies and intimately related to cancer progression. Homeostatic response to hypoxia is primarily mediated by hypoxia inducible factor-1alpha (HIF-1alpha) that elicits transcriptional activity through recruitment P300 coactivator. Targeting the interaction of HIF- alpha and P300 would thus constitute a novel approach for cancer treatment by suppressing tumor angiogenesis and metastasis. Here, a screening assay was developed for inhibitors targeting the interaction between HIF-1alpha and P300. The nucleotide sequence of human HIF-1alpha and P300 were cloned into pBIND and pACT vectors, named pBIND-HIF1alpha and pACT-P300. The interaction of HIF-1alpha and P300 was identified in HEK293 cell using mammalian two-hybrid system. And compound chetomin decreased their interaction in this mammalian two-hybrid system. We further verified HIF-1 inhibition effect of chetomin in U251-HRE cells. Therefore, we established a screening assay combined HIF-1alpha and P300 mammalian two-hybrid system and U251-HRE reporter assay for HIF-1 selective inhibitors.

OBJECTIVE:To prepare the levofloxacin(LEF)thermosensitive gel for ophthalmic drug delivery,and to study the drug release in vitro.METHODS:Poloxamer407was used as themosensitive material for the LEF eye drop,the best con?centration of poloxamer in prescription was selected according to the temperature of gel,a novel membraneless model was used to study the drug release.RESUTS:The detected concentration of LEF was in the linear range of3～11?g/ml(r=0.9991,n=6),the recovery was99.62%;The best concentration of poloxamer in prescription was18%;Drug release followed zero-order kinetics,and the quantity of drug release was controlled by that of gel dissolution.CONCLUSION:The preparation is simple in method and easy to control in dosage,therefore it shows a promising future in development.

Carotid Body Tumor ; diagnosis ; therapy ; Humans