In recent years , the emergence and progress of cancer genomics and targeted therapies have remarkably expanded the application fields of protein-protein interaction in cancer research .Fluorescence resonance energy transfer ( FRET ) is a kind of nonradiation energy transfer technique , which can timing , quantitative , positioning , and dynamically monitor the interaction between protein and protein in living cells .With the discovery of novel fluorescent proteins and the development of FRET -based biosensors , FRET has became an important method for visualizing spatial and temporal dynamics of interactions among biological macromolecules in native environments .This review summarises the recent studies and technological advances that have enhanced the use of FRET tech -nology in cancer basic research , early diagnosis , prognosis evaluation , drug development and other areas .

Objective: To investigate the awareness of hepatitis C prevention and control knowledge and its influencing factors among female sex workers (FSWs) in Jiaxing City, Zhejiang Province. Methods: According to the HIV/AIDS Sentinel Surveillance Plan, FSWs at ages of 15 to 65 years monitored by the national AIDS surveillance sentinel in Jiaxing City were recruited, and demographic information, awareness of hepatitis C prevention and control knowledge and related behaviors were collected by questionnaire surveys. Factors affecting the awareness of hepatitis C prevention and control knowledge were identified by a multivariable logistic regression model. Results: A total of 430 questionnaires were allocated, and 412 were valid, with an effective rate of 95.81%. The respondents had a mean age of (28.58±4.93) years, and included 258 unmarried FSWs (62.62%), 344 with registered residence outside Zhejiang Province (83.50%), 212 with junior high school education or below (51.46%) and 243 from high-end entertainment places (58.98%). The overall awareness of hepatitis C prevention and control knowledge among FSWs was 20.39%, and the awareness of "Transfusion of blood containing hepatitis C virus may acquire hepatitis C" (38.83%) and the awareness of "tattooing, eyebrow tattooing and ear piercing in streets or small shops may infect hepatitis C" (38.11%) were relatively low. Multivariable logistic regression analysis identified marital status (divorced or widowed, OR=0.161, 95%CI: 0.054-0.482), educational level (high school or technical secondary school, OR=2.568, 95%CI: 1.446-4.560; junior college or above, OR=6.110, 95%CI: 2.658 -14.045) and grade of entertainment places (high-end entertainment places, OR=2.756, 95%CI: 1.525-4.982) as factors affecting the awareness of hepatitis C prevention and control knowledge among FSWs. Conclusion FSWs in Jiaxing City have a low awareness of hepatitis C prevention and control knowledge, especially lacking of knowledge about the transmission routes and prognosis of hepatitis C.

Humans ; Pathology, Molecular ; Prognosis ; Thymoma ; diagnosis ; pathology ; Thymus Neoplasms ; diagnosis ; pathology

Objective To investigate the effects of urotensin Ⅱ/urotensin Ⅱreceptor ( UⅡ/UT) system on the expression of inflammatory signal molecules p 38 mitogen-activated protein kinase ( p38 MAPK) and nuclear factor-κB ( NF-κB ) in lipopolysaccharide ( LPS )-stimulated Kupffer cells ( KCs ) . Methods Rat KCs were isolated and purified by means of in situ perfusion and density gradient centrifuga-tion.The isolated cells were randomly divided into six treatment groups including group 1:UⅡ(-) urantide (-)LPS(-), group 2:UⅡ(+)urantide(-)LPS(-), group 3: UⅡ(-)urantide(+)LPS(-), group 4:UⅡ(-)urantide(-)LPS(+), group 5:UⅡ(+) urantide(-) LPS(+) and group 6:UⅡ(-)urantide(+) LPS(+) .Western blot assay was performed to detect p 38 MAPK/p-p38 MAPK protein and NF-κB p65 sub-unit.The DNA-binding activity of NF-κB was tested by electrophoretic mobility shift assay (EMSA).Re-sults There was no significant difference with the expression of p 38 MAPK protein in KCs among the six groups (P>0.05).The expression of p65 protein and p-p38 MAPK and the DNA-binding activity of NF-κB were significantly enhanced in LPS-stimulated KCs from groups 4, 5 and 6 in comparison with those in group 1 (P<0.01).No significant differences with the levels of p65 protein and phosphor-p38 MAPK and the DNA-binding activity of NF-κB were observed between UⅡ/urantide-treated cells ( group 2 or group 3) and untreated cells (group 1) (all P>0.05), but that were decreased in group 6 than those in group 4 (all P<0.01).Conclusion UⅡ/UT system participated in the activation of p38 MAPK and NF-κB signaling pathways in LPS-stimulated primary Kupffer cells .

OBJECTIVETo study the clinical, pathologic, immunophenotype, molecular characteristics and prognosis of HIV-negative plasmablastic lymphoma (PBL).

METHODSTwelve cases of HIV-negative PBLs diagnosed between 2005 and 2014 in Guangdong General Hospital were identified according to WHO classification of tumors of haematopoietic and lymphoid tissues (2008). The clinicopathologic features and outcome were analyzed and the relevant literatures were reviewed.

RESULTSThe patients were predominantly male (11/12) with a median age of 55.5 years. The tumor cells showed the characteristic combination of immunoblastic/plasmablastic morphology, plasma cell phenotype and high proliferation, no expression of mature B cell markers. 7/10 of the cases were EBER positive. Two cases were positive for C-myc translocation. Four of twelve patients were died.

CONCLUSIONSPBL is a rare, aggressive B-cell lymphoma. HIV-negative PBL has lower rate of oral involvement and EBER expression than HIV-positive patients, the differential diagnosis is very challenging, and the prognosis is worse.

Diagnosis, Differential ; Female ; HIV Seronegativity ; Humans ; Immunophenotyping ; Lymphoma, B-Cell ; diagnosis ; Male ; Middle Aged ; Plasma Cells ; classification ; Plasmablastic Lymphoma ; diagnosis ; pathology ; Prognosis ; Translocation, Genetic

Objective To explore the relationship between the nicotinamide adenine dinucleotide phosphate (NADPH) oxidase p22phox subunit C242T gene polymorphism and large artery atherosclerotic cerebral infaretion(LAACI) among Han population in Songjiang district of Shanghai city.Methods The polymerase chain reaction-restrictive fragment length polymorphism analysis and gene sequencing techniques were adopted to conduct the gene type and allele frequency detection of C242T gene polymorphism loci in 310 Han patients with LAACI and 330 healthy individuals as control group in Shanghai Songjiang area.Then the correlation between C242T gene polymorphism and LAACI was analyzed.Results The level of MDA and the activity of NADPH oxidase in the LAACI group were significantly higher than those in the control group (P＜0.05).The smoking rate,alcohol drinking rate,hypertension rate,systolic pressure,diastolic pressure,and levels of blood glucose,TC,TG,LDL,ox-HDL and ox-LDL in the LAACI group were higher than those in the control group (P＜0.05),while the HDL level in LAACI group was lower than that in the control group (P＜0.05).The frequencies of CT+TT genetype and T allelic gene in the LAACI group were much higher than those in the control group (P＜0.05);the Logistic regression analysis found that smoking,hypertension,systolic pressure,diastolic pressure,blood glucose level,Lp (a),ox-HDL level,MDA level,NADPH oxiolase activity and NADPH C242T genotype were independent risk factors for LAACI.Conclusion NADPH oxidase P22phox C242T gene polymorphism has a correlation with LAACI and is another independent risk factor for LAACI except for hypertension,smoking and lipid oxidation.

Objective To explore the relations ofnicotinamide adenine dinucleotide phosphate (NAD [P]H) oxidase p22phox C242T gene polymorphism with hyperlipidemia and cerebral infarction.Methods A case-control association study containing 207 hyperlipidemia patients (collected from Physical Examination Center from March 2014 to March 2015),185 cerebral infarction patients (collected from Department of Neurology from March 2014 to March 2015) and 183 controls (collected from Physical Examination Center from March 2014 to March 2015) was carried out.The genetypes and allele frequency were compared;the clinical data,lipoprotein oxidation level and NAD (P)H oxidase activity were performed correlation analysis between different patient groups and different genetypes.Results There were no differences in low-density lipoprotein (LDL),oxidized LDL and malondialdehyde levels,NAD (P)H oxidase activity,and frequencies of CT+TT genotype and T allelic gene between patients with hyperlipidemia and controls (P＞0.05).Group of cerebral infarction had significantly higher serum levels of oxidized high-density lipoprotein (HDL) and malondialdehyde,and NAD(P)H oxidase activity than the controls (P＜0.05);the frequencies of CT+TT genotype and T allelic gene in patients with cerebral infarction were significantly higher than those in the controls (P＜0.05).There was no difference between CC genotype patients and CT+TT genotype patients in the serum levels of triglyceride,cholesterol and HDL (P＞0.05),but CC genotype patients had significantly higher serum levels of oxidized HDL,oxidized LDL and malondialdehyde,and NADPH oxidase activity than CT+TT genetype patients (P＜0.05).Logistic regression analysis indicated that smoking,hypertension,serum levels oflipoprotein (a),oxidized HDL and malondialdehyde,NADPH oxidase activity and T allelic gene (OR=0.299,95％CI:0.102-1.879,P=0.028) were independent risk factors for cerebral infarction.Conclusion C242T polymorphism is associated with lipoprotein oxidation and cerebral infarction in Han people from Shanghai Songjiang of China,and T allelic gene and lipoprotein oxidation are independent risk factors for cerebral infarction.

Objective To investigate the effects of hydrochloride fasudil on inflammation and secondary brain injury in rats after intracerebral hemorrhage (ICH).Methods One hundred and seventeen male Wistar rats were randomly divided into normal group (n=9),sham-operated group (n=36),ICH group (n=36) and hydrochloride fasudil treatment group (ICH/HF,n=36).ICH was caused by injecting non-anticoagulant autologous arterial blood into the right caudate nucleus,3 mg HF was dissolved in 2 mL 0.9％ saline solution and administrated intraperitioneally once daily (12 mg/kg/d) since 12 h ofICH onset.Rats in the sham-operated group and ICH group received an equal volume of normal saline.On one,3,7 and 14 d ofICH induction,Bederson method was used to score neurological deficits in rats;interleukin (IL)-6 and tumor necrosis factor (TNF)-α levels in serum were detected by enzyme-linked immunosorbent assay (ELISA).Brain edema was measured by comparing wet and dry brain weights.Inflammatory cell infiltration around the hematoma was visualized using hematoxylin and eosin,and changes in neuronal morphology were detected by Nissl staining.Immunohistochemistry method was used to detect the expressions of Caspase-3 and Bcl-2.Results (1) The neurological deficit scale scores on one and 3 d ofICH in the ICH/HF group were significantly decreased as compared with those in the ICH group (P＜0.05).(2) Serum IL-6 (except 14 d of ICH) and TNF-α levels in ICH/HF group were significantly decreased as compared with those in the ICH group (P＜0.05).(3) Brain water contents at each time point in ICH/HF group were significantly decreased as compared with those in the ICH group (P＜0.05).(4) HE staining showed the sizes of hematoma on one and 3 d ofICH in the ICH/HF group and ICH group were consistent;but ICH/HF group had smaller hematomas on 7 d of ICH,and disappeared hematoma and glial cell hyperplasia on 14 d of ICH.Mass neutrophils infiltration developed in the perihematomal areas of the ICH and ICH/HF groups;however,neutrophils infiltration in the ICH/HF group ([20.56±6.37] cells/field) was significantly decreased as compared with that in the ICH group ([41.50±8.91] cells/field) on one d of ICH (P＜0.05).(5) Nissl staining showed neuron death and loss in the perihematomal areas on one,3 and 7 d of ICH in the ICH group;but ICH/HF group had significantly increased neuron number as compared with the ICH group (P＜0.05).(6) The Caspase-3 expression on 3 and 7 d ofICH in the ICH/HF group was significantly decreased as compared with that in the ICH group (P＜0.05);the Bcl-2 expressions at each time point in the ICH/HF group was significantly increased as compared with that in the ICH group (P＜0.05).Conclusion HF exerts neuroprotective effects in ICH rat models by decreasing serum IL-6 and TNF-α levels,reducing neutrophils infiltration and neuronal necrosis around the hematoma,restraining the cell apoptosis through down-regulating Caspase-3 and up-regulating expression of Bcl-2,alleviating the brain edema,and improving the neurological outcome.

Objective: To evaluate the efficacy and safety of maintenance therapy with reduced dose of rhTPO in the patients with primary immune thrombocytopenia (ITP) who attained stable platelet (PLT) counts after daily administration of rhTPO. Methods: Treatment was started with a daily administration of rhTPO (300 U/kg) for 2 consecutive weeks. Patients who attained stable PLT≥50×10⁹/L were enrolled to maintenance therapy starting with every other day administration of rhTPO, then adjusted dose interval to maintain platelet count (30-100) ×10⁹/L. Results: A total of 91 eligible patients were enrolled. Fourteen patients discontinued the study due to noncompliance (12/14) and investigator decision (2/14) . Among 77 patients who completed the study, 38 patients with the administration of rhTPO at every other day or less could maintain PLT≥30×10⁹/L for 12 weeks. The percentage of patients with a platelet response (PLT≥30×10⁹/L) at 4^th week, 8^th week and 12^th week of maintain therapy was 92.6% (63/68) , 82.7% (43/52) and 85.0% (34/40) , respectively. Median platelet counts remained in the range of (70-124) ×10⁹/L. The overall incidence of rhTPO-related adverse events was 7.7%. All the adverse events were generally mild. Conclusion Extending the dose interval of rhTPO is feasible to maintain stable platelet count in the patients with ITP, but the optimal dose interval is uncertain and might vary with individuals.

Objective: To investigate the effects between fish, seafood and pickled food intakes on oral squamous cell carcinoma (OSCC). Methods: A case-control study was carried out in Fujian area during September 2010 to December 2016, in which 604 newly diagnosed primary OSCC cases confirmed by pathological diagnosis were collected from hospital and 1 343 control subjects were enrolled from community and healthy hospital population. Demographic data, history of smoking drinking and tea drinking, oral hygiene status and dietary behaviors (fish, seafood and pickled food intakes) were collected by in-person interviews using a standard questionnaire.Using unconditional logistic regression to estimate adjusted odds ratios (ORs) and corresponding 95% confidence intervals (CIs) to assess the effects of fish, seafood and pickled food intakes on OSCC. Analysis stratified by smoking, alcohol drinking and bad prosthesis to explore the possible difference in association between subgroups. Multiplicative interactions and additive interactions between fish and bad prosthesis, seafood and alcohol drinking, pickled food and bad prosthesis were assessed by unconditional logistic regression, relative excess risk due to interaction (RERI), attributable proportion due to interaction (AP) and synergy index (S). Results: The average age of case group and control group were separately (58.69±13.92) years old and (59.27±11.37) years old (χ²=4.75, P=0.191). The people whose fish and seafood intakes ≥3 times/week had the lower risk of OSCC, the adjusted OR (95%CI) values were 0.63 (0.52-0.77) and 0.51 (0.41-0.64); The stratified analysis indicated that the people having bad prosthesis had the lower risk of OSCC if they eating fish ≥3 times/week, and the adjusted OR (95%CI) values was 0.53 (0.39-0.71); the people having bad prosthesis had the higher risk of OSCC if they eating pickled food ≥3 times/week, the adjusted OR (95%CI) values was 1.37 (1.02-1.88). Regularly eating seafood can decrease the risk of OSCC for non-smokers, smokers, non-drinkers, drinkers, people without bad prosthesis and had bad prosthesis, the adjusted OR (95%CI) values were 0.49 (0.36-0.68), 0.52 (0.37-0.73), 0.41 (0.31-0.55), 0.77 (0.51-0.96), 0.49 (0.36-0.67), 0.59 (0.42-0.83). Crossover analysis showed fish and bad prosthesis exist multiplication interaction relationship (adjusted OR=0.66, 95%CI: 0.44-0.97) and additional interaction relationship (RERI=-0.81, 95%CI:-1.43--0.19; AP=-0.76, 95%CI:-1.35--0.17; S=0.08, 95%CI: 0.01-0.98); pickled food and bad prosthesis exist multiplication interaction relationship (adjusted OR=1.63, 95%CI: 1.06-2.51) and addition interaction relationship (RERI=0.65, 95%CI:0.08-1.22; AP=0.36, 95%CI:0.10-0.62; S=5.19, 95%CI:1.32-54.49). Conclusion Reducing the consumption of pickled food, quitting smoking and limiting alcohol consumption, and regularly eating fish and seafood can prevent the occurrence of OSCC.