ABSTRACT
Objective Rho signaling component α-catulin,is a cytoskeletal linker protein and plays an important role in apoptotic and senescence resistance,cytoskeletal reorganization,mobility,invasion and epithelial to mesenchymal transition(EMt)of cancer cells. Methods Here,we ex-amined α-catulin expression in squamous epithelium,dysplasia and cancer of head and neck on tissue microarrays by immunostaining. Its expres-sion was compared with clinicopathological parameters and survival rate of cancers. Results It was found that α-catulin expression level was signifi-cantly higher in primary cancers than that in normal squamous epithelium and dysplasia(P 0.05). Cox′s proportional hazard model indicated that distant metastasis and tNM staging were independent prognostic factors for overall survival of the patients with head and neck squamous carcinoma(HNSCC,P < 0.05). Conclusion these findings suggested that up-regulated expression of α-catulin protein may play an important role in the pathogenesis of HNSCC,which might be employed as a potential marker for tumorgenesis of HNSCCs.
ABSTRACT
Objective To investigate the relationship between orthostatic hypotension (OH) and antihypertensive therapy in the elderly hypertensive population.Methods A total of 1174 elderly retired people (849 cases with hypertension and 325 cases without hypertension) in Guangzhou Military Region underwent health physical examination.All people were surveyed by questionnaires.The orthostatic blood pressure and heart rate were measured in supine position after resting for more than 5 minutes and then at 0 and 2 minutes after standing.Comparative analysis was made on the prevalence of OH and the relationship between OH and antihypertensive therapy.Results A significant difference in the prevalence of OH was observed between hypertensive patients and nonhypertensive patients [29.4％ (250/849) vs.15.7％ (51/325),x2 =23.32,P＜0.01].There was no significant difference in the prevalence of orthostatic hypotension in patients with versus without antihypertensive therapy [30.5％ (220/721) vs.23.4％ (30/128),x2 =2.62,P＞0.05].Conclusions Orthostatic hypotension is common observed in elderly hypertensive patients.Antihypertensive therapy may not increase the prevalence of OH.
ABSTRACT
Objective To investigate the association between the systolic/diastolic orthostatic hypotension (OH-S/OH-D) and myoeardial infarction (MI) in the elderly.Methods Health screening physical examination were carried in 1081 subjects without MI aged over 65 years in Guangzhou Military region.The orthostatic blood pressure and heart rate were measured in supine position after resting for more than 5 minutes and at 0 and 2 minutes after standing.All the cases were divided into systolic or diastolic group on the basis of definition of orthostatic hypotension and followed up by telephone or inpatient medical records with mean period of 315.8 days.The primary endpoint was MI occurrence.Results The prevalence of OH in this cohort was 24.5％ ( OH-S/OH-D:19.3％/17.2％ ).Significant differences in the occurrence of OH and OH-S were found in the elderly and the very elderly subjects( ≥80 years) (26.1％ vs 20.1％,P=0.045; 21.0％ vs 14.6％,P =0.018),while no difference was found in OH-D.The prevalence of MI in the OH positive subjects was significantly higher than that in the OH negative subjects,as well as in OH-S or OH-D group.After adjustment of age,supine blood pressure,creatinine and cerebrovascular history by logistic regression,the association was observed between MI and OH ( HR 15.635,95 ％ CI 3.299-74.091,P=0.001),OH-S(HR 8.760,95％CI2.487-30.851,P=0.001)and OH-D(HR 3.889,95％ CI 1.097-13.790,P =0.035 ).Conclusion OH-S and OH-D hypotension are robust predictors for MI in the elderly.
ABSTRACT
BACKGROUND: Craniofacial hard tissue structures vary in age, gender, regional and racial differences. Some researchers have conducted X-ray cephalometric measures of malocclusion deformity in some domestic cities, and obtained normal cephalometric measures of craniofacial hard tissue structure. However, little data have been available concerning cephalometric measures of craniofacial hard tissue structure of Tibetan youth in Tibet region. OBJECTIVE: To observe structural features of craniofacial hard tissue of permanent tooth occlusal period in the adolescent of Lhasa. DESIGN, TIME AND SETTING: Stratified cluster sampling survey was performed at Naqu, Tibet from June to August 2008. PARTICIPANTS: A total of 200 adolescents at permanent tooth occlusal period, 100 males and 100 females aged 11-14 years were selected from middle and primary schools of Lhasa in 2003. The inclusion criteria included: teeth in order, neutral occlusal adjustment, normal maxilla and mandible appearance and relationship, normal teeth number and overbite and overjet, concordant face, and no history of orthodontic management. METHODS: According to the requirements and standards for the irradiation, 200 subjects underwent X-ray cephalometric measures, and the results were compared with normal values of the same age. MAIN OUTCOME MEASURES: SNA angle, SNB angle, ANB angle, 1-SA angle, 1-NA angle, 1-NA, T-MP angle, Y axial angle, NP-FH angle, NA-PA angle, 1-T angle, MP-SN angle, Po-NB, T-NB angle, T-NB, and MP-FH angle. RESULTS: No significant differences were found between Lhasa adolescents and normal values in terms of SNA angle, SNB angle, ANB angle, 1-SN angle, 1-NA angle, 1-NA, T-MP angle, Y axial angle, NP-FH, NA-PA, 1-T, and MP-SN. Po-NB was slightly greater than normal value and T-NB angle, T-NB and MP-FH were significantly less than normal values. CONCLUSION: Lhasa adolescents have significantly different craniofacial hard tissue structure from normal values: forward protrusion of mental region, flat mandible angle, straight mandible anterior teeth, upward and forward rotated mandible, and straight face type.
ABSTRACT
BACKGROUND: It has been confirmed that some casting alloy can inhibit the activity of human gingival fibroblasts in vitro, which can be used for inducing apoptosis of human gingival fibroblasts (HGFs). However, the mechanism of this effect is poorly understood.OBJECTIVE: To investigate the effect of Ni-Cr, Co-Cr, Au and pure Ti ceramic alloys on the expression of P70S6k by HGFs in vitro.DESIGN, TIME AND SETTING: Grouping controlled experiments with the expression of P70s6k by HGFs in each group as observation objects. Experiments were performed at the Institute of Immunohistochemistry and Western blotting, Technology Building of Liaoning Medical University from July to October 2009.MATERIALS: Ni-Cr, Co-Cr, Au and pure Ti ceramic alloys were processed by Shenzhen Mecodent Dental Laboratory Co., Ltd. The gingival from gingival neck of the first premolar (which goes to be extracted due to the need of orthodontic treatment) of teenager who was15 years old without any clinical disease was obtained, followed by the primary culture of HGFs. The fifth passage of cells in logarithmic phase were used to measure indexes.METHODS: Ni-Cr, Co-Cr, Au and pure Ti ceramic alloys were incubated in DMEM to prepare alloy leaching liquor, which were then added in HGF medium at 10% concentration. DMEM containing 10% fetal bovine serum was used in negative controls. MAIN OUTCOME MEASURES: The expression of P70S6k in each group was measured by Western Blotting following 72 hours of intervention with alloy leaching liquor.RESULTS: Western-blot results showed that there was no significant difference in the average gray value of P70S6k expression in Au, pure Ti ceramic alloys and control groups (P > 0.05). There was also no significant difference between Au ceramic alloys and pure Ti ceramic alloys groups or between Ni-Cr ceramic alloys and Co-Cr ceramic alloys groups. (P > 0.05), but Ni-Cr ceramic alloys group or Co-Cr ceramic alloys group showed significant difference compared with the Au, pure Ti ceramic alloys and control groups (P < 0.01).CONCLUSION: Au ceramic alloys and pure Ti ceramic alloys show that they have no obvious effect on the proliferation activity of HGFs. Ni-Cr and Co-Cr ceramic alloys showed an inhibitory effect on the proliferation activity of HGFs.
ABSTRACT
BACKGROUND:Craniofacial hard tissue structures vary in age,gender,regional and racial differences.Some researchers have conducted X-ray cephalometric measures of malocclusion deformity in some domestic cities,and obtained normal cephalometric measures of craniofacial hard tissue structure.However,little data have been available concerning cephalometric measures of craniofacial hard tissue structure of Tibetan youth in Tibet region.OBJECTIVE:To observe structural features of craniofacial hard tissue of permanent tooth occlusal period in the adolescent of Lhasa.DESIGN,TIME AND SETTING:Stratified cluster sampling survey was performed at Naqu,Tibet from June to August 2008.PARTICIPANTS:A total of 200 adolescents at permanent tooth occlusal period,100 males and 100 females aged 11-14 years were selected from middle and primary schools of Lhasa in 2003.The inclusion criteria included:teeth in order,neutral occlusal adjustment,normal maxilla and mandible appearance and relationship,normal teeth number and overbite and overjet,concordant face,and no history of orthodontic management.METHODS:According to the requirements and standards for the irradiation,200 subjects underwent X-ray cephalometric measures,and the results were compared with normal values of the same age.MAIN OUTCOME MEASURES:SNA angle,SNB angle,ANB angle,1-SA angle,1-NA angle,1-NA,?-MP angle,Y axial angle,NP-FH angle,NA-PA angle,1-? angle,MP-SN angle,Po-NB,?-NB angle,?-NB,and MP-FH angle.RESULTS:No significant differences were found between Lhasa adolescents and normal values in terms of SNA angle,SNB angle,ANB angle,1-SN angle,1-NA angle,1-NA,?-MP angle,Y axial angle,NP-FH,NA-PA,1-?,and MP-SN.Po-NB was slightly greater than normal value and ?-NB angle,?-NB and MP-FH were significantly less than normal values.CONCLUSION:Lhasa adolescents have significantly different craniofacial hard tissue structure from normal values:forward protrusion of mental region,flat mandible angle,straight mandible anterior teeth,upward and forward rotated mandible,and straight face type.