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@# Objective: To investigate the expressions of programmed death ligand 1（PD-L1）in triple-negative breast cancer (TNBC) and its correlation with angiogenesis. Methods: 120 cases of TNBC patients who underwent surgery in the Fourth Hospital of Hebei Medical University from March 1, 2011 to June 1, 2012 were collected. The tumor tissues of patients were surgically resected and confirmed by pathology. PD-L1 protein expression in TNBC tissues of 120 patients was detected by tissue microarray combined with immunohistochemistry, and its relationship with various clinical indicators was analyzed. Blood vessels and lymphatic vessels were labeled withCD34andD2-40todetectmicrovesseldensity(MVD)andlymphaticvesseldensity(LVD)inTNBC.Results:Thepositiveexpression rate of PD-L1 in the tumor cells and interstitial infiltrating lymphocytes fromTNBC was 56.7% (68/120); No correlation was found between PD-L1 protein expression and the gender, age, histological grade, clinical stage, or tumor size of patients with TNBC (P>0.05), but related to the lymph node metastasis (P<0.05) and vascular thrombus (P<0.05). TNBC with high PD-L1 expression exhibited high incidence of lymph node metastasis and formation of vascular thrombus, and the expression of PD-L1 was positively correlated with MVD (r=0.500, P=0.02) as well as LVD (r=0.662, P=0.01). Log-Rank test showed that the survival time of TNBC patients with positive PD-L1 protein expression was significantly shorter than that of patients with negative expression (P<0.05). Cox multivariate analysis suggested that PD-L1 protein expression could be an independent prognostic factor for TNBC overall survival. Conclusion: PD-L1 plays an important role in TNBC angiogenesis and lymphangiogenesis, and is closely related to TNBC invasion and metastasis; blocking PD1/PD-L1 signal pathway is expected to be an effective new strategy for TNBC treatment.
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OBJECTIVE@#To explore the mechanism of smoking that promotes chronic periodontitis from the perspective of gingival microcirculation.@*METHODS@#In experiment one, upper anterior teeth (n=102) from smokers with chronic periodontitis (Group A), nonsmokers with chronic periodontitis (Group B), and nonsmokers with healthy periodontal conditions (Group C) were selected to undergo gingival blood flow (GBF) through laser doppler flowmetry. In experiment two, the tissues obtained from gums during periodontal flap surgery were divided into smoking (Group A') and nonsmoking (Group B') groups, and the gingival tissue obtained from periodontal healthy nonsmokers treated with crown lengthening surgery or impacted wisdom tooth extraction served as the control group (Group C'). The microvessels density (MVD) of the gingival tissue from the three groups was determined in the tissue sections. SPSS 22.0 was used for statistical analysis.@*RESULTS@#Compared with group C, GBF of all teeth increased in group B, and there were significant differences among 12, 21 and 23 teeth. MVD significantly differed between Group B' and C' (P<0.05), but they did not significantly differ between Group A' and B'.@*CONCLUSIONS@#Periodontitis can increase GBF and MVD, but smoking does not cause significant changes. However, the mechanism by which smoking promotes the occurrence and development of chronic periodontitis by influencing gingival microcirculation has not been discussed in this research.
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Humans , Chronic Periodontitis , Microcirculation , SmokingABSTRACT
Objective To investigate tumor lymphatic and mircovascular densities as prognostic markers in 69 cases of invasive breast cancer treated with partial or total mastectomy and lymph node dissection.Methods 69 cases of untreated primary unilateral invasive ductal breast carcinomas were selected.All cases were immunostained with D2-40 and CD31.Positively stained microvessels were counted in densely vascular/lymphatic foci (hot spots).The relationship between lymphatic vessel density (LVD),microvessel density(MVD) and prognosis was analyzed.Results The mean ± SD peritumoral lymphatic vessel density (P-LVD) was significantly higher than intratumoral LVD(I-LVD) (P ＜ 0.01).There was a positive correlation of D2-40 LVD(peritumoral) counts with lymph node metastasis (P =0.003) and clinical stage (P =0.026),and CD31 microvessel density was found significantly associated with clinical stage(P =0.038).No significant association was found between above variants with I-LVD (P ＞ 0.05).Univariate analysis showed that survival time was impaired by higher MVD and higher peritumoral LVD(P =0.007,P =0.008,P =0.014,P =0.024,log-rank test),but not I-LVD.Multivariate survival analysis showed that MVD,peritumoral LVD,TNM stage and lymph node metastasis were independent prognostic factors for overall survival.Conclusions Peritumoral LVD and MVD were significantly correlated with survival status of patients with breast cancer.This is the first attempt to predict prognosis of breast cancer patients by quantifying the peritumoral LVD and MVD.