Expression and potential clinical significance of cytidine triphosphate: phosphocholine cytidylyltransferase-α in oral squamous cell carcinoma / 中华口腔医学杂志

Objective@#To examine the expression and potential clinical significance of CCT (cytidine triphosphate: phosphocholine cytidylyltransferase)-α in oral squamous cell carcinoma (OSCC).@*Methods@#Fifty-eight OSCC and paired adjacent non-malignant epithelia samples (between May 2016 and July 2016) were obtained from dental center, Second Xiangya Hospital, Central South University. CCT-α expression was examined by immunohistochemistry. The relationship between CCT-α and clinicopathological features of OSCC patients was analyzed. Quantitative real-time PCR and Western blot were performed to measure the expression of CCT-α mRNA and protein level in several OSCC cell line and two normal oral epithelial cell line.@*Results@#Immunohistochemistry showed that CCT-α positive staining was found in cell nuclear of OSCC cells and adjacent epithelial cells. CCT-α was positively expressed in OSCC, which was significantly higher than that adjacent to carcinoma tissues (P=0.000). The expression of CCT-α in oral squamous cell carcinoma was correlated with smoking, alcohol consumption, tumor size, differentiation degree and lymph node metastasis. The expression level of CCT-α protein was significantly increased in patients with a history of smoking and alcohol consumption (P=0.001, P=0.004). With the increase of tumor diameter, the expression of CCT-α protein was significantly increased (P=0.005). According to histopathological grade, the lower the degree of tumor differentiation, the higher the expression level of CCT-α protein (P=0.000). The expression of CCT-α protein was significantly higher in patients with lymph node metastasis compared with no lymph node metastasis (P=0.000). Quantitative real-time PCR results showed the CCT-α mRNA expression level was significantly higher in OSCC cells than that in normal oral epithelial cells (P=0.016). The protein expression level of CCT-α was significantly higher in OSCC cells than that in normal oral epithelial cells.@*Conclusions@#CCT-α may play a critical role in the carcinogenesis and development of OSCC.

HRCT diagnosis of Goodpasture syndrome / 实用放射学杂志

Objective To analyze the imaging features and follow-up changes of high-resolution CT(HRCT) in Goodpasture syndrome.Methods HRCT imaging features and follow-up findings of 15 cases Goodpasture syndrome confirmed by clinical were analyzed retrospectrively.The imaging features included extent,forms and follow-up changes.Results The lung lesion of Goodpasture syndrome involved two lobes(n=1), three lobes(n=2), four lobes(n=5) and five lobes (n=7).Upper lobe of the right lung was the most common involved region.Centered on the hilum of lung consolidations confused ground glass opacity (GGO) were showed in 7 cases, GGO distribution of pulmonary leaflets in 5 cases.On follow-up observation, lobar or segmental consolidation could change into GGO,GGO could disappear in short times.Conclusion Multiple lobar or segmental consolidations confused GGO without the lung bottom and periphery involvement is the imaging characteristics of Goodpasture syndrome patients with anemia and hemoptysis.HRCT is a helpful method for the diagnosis and following up of Goodpasture syndrome.

Diagnostic value of magnetic resonance imaging combined with transvaginal color doppler sonography on early-stage cervical cancer / 实用放射学杂志

Objective To evaluate the predictive value of magnetic resonance imaging (MRI)and transvaginal color doppler sonography (TVCDS)for the early-stage cervical cancer.Methods MRI and TVCDS images data of thirty-five patients with early-stage cervical cancer in Kailuan general hospital were retrospectively analyzed.The clinical stage of cases wereⅠb andⅡa.All patients were performed with MRI and TVCDS pre-operation.The accuracy rate of different methods and combined application were statistically analyzed.Results There were significant difference between MRI,TVCDS,MRI combined with TVCDS for tumor diameter,cervical stromal invasion,vaginal invasion,parametrial invasion,lymph node metastases(P<0.05),which accuracy rates were 88.4%,79.2%,89.4%,97.4%, 92.3% respectively for MRI combined with TVCDS.The MRI combined with TVCDS was the best method.Conclusion MRI combined with TVCDS has key value for early diagnosis of cervical cancer pre-operation.It can help to completely understand the situation of early stage cervical cancer and to select the suitable treatment.

LKB1 in lung cancerigenesis: a serine/threonine kinase as tumor suppressor

Lung cancer is featured with high mortality, with a 15% five-year survival rate worldwide. Genetic alterations, such as loss of function of tumor suppressor genes, frequently contribute to lung cancer initiation, progression and metastasis. Liver kinase B1 (LKB1), as a serine/threonine kinase and tumor suppressor, is frequently mutated and inactivated in non-small cell lung cancer (NSCLC). Recent studies have provided strong evidences that LKB1 loss promotes lung cancerigenesis process, especially lung cancer progression and metastasis. This review will summarize recent progress on how LKB1 modulates the process of lung cancerigenesis, emphasizing on LKB1 downstream signaling pathways and biological functions. We will further discuss the potential development of prognostic biomarkers or therapeutic targets in lung cancer clinic based on the molecular alteration associated with deregulated LKB1 signaling.

Expression of FHIT and MDM2 in oral submucous fibrosis and canceration tissues / 中南大学学报(医学版)

OBJECTIVE@#To determine the role of fragile histidine triad (FHIT) and MDM2 in carcinogenesis of oral submucous fibrosis (OSF).@*METHODS@#The expression of FHIT and MDM2 was examined by immunohistochemical S-P method in 44 OSF cases, 15 canceration tissues of OSF, and 10 normal oral mucosa tissues.@*RESULTS@#The expression of FHIT was positive in the normal oral mucosa epithelium. The positive expression of FHIT decreased in the OSF and canceration tissues of the OSF.The rate of FHIT positive expression was significantly lower in canceration tissues of OSF than that of the OSF (P < 0.05). The expression of MDM2 was negative in normal oral mucosa epithelium. The positive expression of MDM2 increased in the OSF and canceration tissues of the OSF, and the rate of MDM2 positive expression was significantly higher in the canceration tissues of OSF than that of the OSF (P < 0.05).@*CONCLUSION@#The loss of FHIT and over-expression of MDM2 may play an important role in the carcinogenesis of OSF.

Expression of human telomerase reverse transcriptase in oral submucous fibrosis and carcinogenesis of oral submucous fibrosis / 实用口腔医学杂志

Objective:To investigate the role of human telomerase reverse transcriptase(hTERT) in carcinogenesis of oral submucous fibrosis(OSF).Methods:The expression of hTERT was examined by immunohistochemical SP method in 10 cases of normal oral mucosa, 46 cases of OSF,14 of carcinogenesis of OSF and 10 of adjacent non-cancerous OSF tissue. Results:The expression of hTERT was negative in normal oral muscosal epithelium.The frequency of hTERT positive expression was higher in carcinogenesis lesions of OSF(12/14) than those in OSF(7/46)(P

The effect of keratinocytes preprocessed by arecoline on the differentiation of myofibroblast / 中国免疫学杂志

Objective:In order to elucidate the derivation and differentiation mechanisms for derivation of myofibroblasts in oral submucous fibrosis.Methods:Oral keratinocytes and fibroblasts were isolated and cultured,and a co-cultur system composed of the keratinocytes and fibroblasts was established in vitro.Expressions of ?-SMA protein and mRNA in fibroblasts were detected by immunohistochemistry and RT-PCR. The level of TGF-?1 in conditioned medium were evaluated by ELISA.Results:The expressions of ?-SMA mRNA and protein in fibroblasts co-cultured with keratinocytes preprocessed by arecoline was higher than that in fibroblasts co-cultured with keratinocytes and without preprocessed by arecoline. The level of TGF-?1 in conditioned medium of fibroblasts-keratinocytes preprocessed by arecoline co-cultures was higher than those of fibroblasts cultured alone.Conclusion:The derivation of myofibroblast from FB can be promoted by keratinocytes preprocessed by arecoline and TGF-?1 may play a role in the process.

Effects of arecoline on the expression of human telomerase reverse transcriptase in oral mucosa keratinocytes / 实用口腔医学杂志

Objective:To investigate the effects of arecoline on the expression of human telomerase reverse transcriptase(hTERT)mRNA and protein in cultured normal human oral mucosa keratinocytes(KCs),and then to investigate the role of hTERT in carcinogenesis of oral submucous fibrosis(OSF).Methods:Normal human oral mucosa KCs were cultured in vitro,and in experiment group,KCs was divided into 0.03,0.06,0.09 g/L arecoline group,and 0.0 g/L arecoline group served as the control.The hTERT mRNA and protein expression of KC was examined by reverse transcription polymerase chain reaction(RT-PCR)and Western blotting.Results:Arecoline induced the hTERT mRNA and protein expression of KC in a dose dependent manner.hTERT mRNA and protein expression of KC were increased by 0.03,0.06 and 0.09 g/L arecoline,when compared with the control group(P

Expression of ?-SMA in fibroblasts of oral submucous fibrosis / 中国免疫学杂志

Objective:To explore the effects of myofibroblast in the pathogenesis of oral submucous fibrosis(OSF).Methods:The expressions of ?-SMA in the tissues of OSF and normal control were detected by immunohistochemistry. Fibroblasts were isolated from oral mucosa of OSF patients and healthy controls and were cultured under stimulation by arecoline.The expressions of ?-SMA in OSF fibroblasts and normal fibroblast were detected by immunocellchemistry and RT-PCR.Results:(1)No positive expression was found in normal tissues except in the blood vessel,but in OSF tissue,?-SMA positive expression was found in many spindle cells in the oral submucousal layer.(2)Few fibroblasts in vitro from normal controls were ?-SMA positive.(3)Most of the second passage of OSF fibroblasts were ?-SMA positive(85.80%?3.56%). (4)The expression of ?-SMA in fibroblasts could not be increased by the stimulation of arecoline.Conclusion:Myofibroblasts may play an important role in the pathogenesis of OSF,and the appearrence of myofibroblasts in OSF may not be directly induced by the stimulation of arecoline.