[The influence factors of pathologic complete response of the ipsilateral supraclavicular lymph node of breast cancer after neoadjuvant chemotherapy].

Objective: To investigate the factors affecting the pathologic complete response (PCR) of the ipsilateral supraclavicular lymph node (ISLN) of breast cancer after neoadjuvant chemotherapy (NAC). Methods: A total of 178 patients with breast cancer who had primary ipsilateral supraclavicular lymph node metastasis (ISLNM), receiving NAC and subsequent ISLN dissection, were retrospectively reviewed. The single factor and multi factor analysis were carried out by the chi square test and the Logistic regression model. Results: The enrolled patients were all female, 28 to 74 years old. The rate of PCR on the ISLN was 52.2%. Single factor analysis showed that KI67 expression level (χ(2)=7.717,P=0.005), breast PCR (bPCR) (χ(2)=33.564,P<0.001), and axillary PCR (aPCR) (χ(2)=31.750, P<0.001) were associated with the ISLN PCR. Multifactor analysis showed that KI67 expression level (OR=4.096, 95%CI: 1.176-14.263, P=0.027), bPCR (OR=4.452, 95%CI: 1.894-10.461, P<0.001) and aPCR (OR=5.183, 95%CI: 1.974-13.605, P<0.001) were independent predictors of ISLN PCR. The rate of PCR on the ISLN was 90.9% in the patients with KI67>30% and simultaneous breast and axilla PCR. Conclusions: The PCR rate of the ISLN after neoadjuvant chemotherapy is higher than that of the breast and axillary PCR. The expression level of KI67, the bPCR and the aPCR are independent predictors of the PCR on the ISLN.

[The influence of lumpectomy on the axillary lymph node status of breast cancer patients].

Objective: To investigate the influence of lumpectomy on axillary lymph node status of breast cancer patients. Methods: The clinical data of 738 invasive breast cancer patients with non-palpable axillary lymph node and sentinel lymph node (SLN) biopsy from November 2011 to August 2013 in Henan Provincial Cancer Hospital were collected and retrospectively analyzed. Among them, 136 patients underwent preoperative lumpectomy (lumpectomy group) and 602 patients underwent puncture biopsy only (biopsy group). The difference of axillary lymph node status and positive ratio of SLN detected by color Doppler ultrasound were compared between these two groups. Results: Among the 738 breast cancer patients, the axillary lymph nodes of 444 (60.2%) cases could be detected by ultrasound. Among them, 92 cases belonged to lumpectomy group, significantly less than 352 cases of biopsy group (P=0.048). Among the patients with ultrasound-visible lymph nodes, the proportion of the biggest diameter of axillary lymph node >1 cm of lumpectomy group or biopsy group was 58.7% (54/92) or 52.8% (186/352), respectively, without significant difference (P=0.316). The proportion of patients with the ratio of long diameter to short diameter <2 of lumpectomy group or biopsy group was 37.0% (34/92) or 38.6% (136/352), respectively, with marginal difference (P=0.768). The positive rate of SLN of lumpectomy group or biopsy group was 23.5% (32/136) or 26.9% (162/602), respectively, without significant difference (P=0.419). The incidence rate of the ultrasound visible axillary lymph nodes of patients whose postoperative time ≤ 7 days or > 7days was 71.1% (64/90) or 60.9% (8/46), respectively, without significant difference (P=0.227). However, the positive rate of SLN of these two groups was 28.9% (26/90) and 13.0% (6/46), respectively, with significant difference (P=0.039). The number of ultrasound visible axillary lymph nodes, the biggest diameter of axillary lymph nodes and the ratio of the long diameter to short diameter <2 were substantially correlated with the positive rate of SLN (P<0.05). Conclusions: The incidence rate of ultrasound visible axillary lymph node in the patients with lumpectomy is higher than that of patients with puncture biopsy only. The positive rate of SLN of the patients with a long postoperative time is lower than that of patients with a short postoperative time, even though the axillary lymph nodes are ultrasound visible.

[Analysis of factors influencing the axillary lymph node metastasis and breast cancer-specific survival in patients with T1 breast cancer].

Objective: To investigate the predictors of axillary lymph node metastasis and the breast cancer-specific survival (BCSS) in patients with T1 breast cancer. Methods: A retrospective analysis of clinical and pathological data of 840 T1 invasive breast cancer cases between January 2009 and January 2014 in Henan Cancer Hospital was conducted.Chi square test and Logistic regression analysis were carried out to identify relevant factors of lymph node metastasis. Analysis of prognostic factors were analyzed by Log-rank test and Cox regression. Results: Among the 840 T1 breast cancer cases, positive axillary lymph nodes were found in 150 (17.9%) cases. Univariate analysis showed that tumor size, histological grade, tumor location, and HER2 status were associated with axillary lymph node status (P<0.05). Multivariate analysis showed that tumor size, histological grade, tumor location, and HER2 status were independent predictive factors of axillary lymph node metastasis (P<0.05). Log-rank test showed that tumor size, histological grade, HER2 status, partial response (PR) status and number of positive lymph nodes were important factors influencing BCSS of the patients with positive axillary lymph nodes (P<0.05). Cox analysis showed that the size of the primary tumors and the number of positive lymph nodes were independent factors affecting the BCSS of the patients(P<0.05). Conclusions: Tumor size, histological grade, tumor location and HER2 status correlated with axillary lymph nodes status of T1 breast cancer. For T1 breast cancer patients with positive axillary lymph node, more positive lymph nodes involved and smaller primary tumor correlated with worse prognosis.

[Analysis of predictive effect of Androgen receptor on the response to neoadjuvant chemotherapy in breast cancer patients].

Objective: To explore the expression of androgen receptor (AR) in the tissues as well as its association with the clinicopathological factors of primary breast cancer patients treated with neoadjuvant chemotherapy (NAC), and analyze the effect of AR in the prediction of pathologic complete response (PCR) rate. Method: A total of 668 breast cancer patients treated with NAC in Henan Cancer Hospital between March 2014 and June 2017 were retrospectively reviewed. The relationship of AR expression and clinicopathological characteristics was calculated using chi square test. Multivariate analysis using binary Logistic regression was used to analyze correlations of different factors with PCR. Result: All patients were female, with the age of 20-76 years old. AR was detected in 74.6% of tumors, and significantly correlated with hormone receptor (HR), human epidermalgrowth factor receptor-2 (HER-2), Ki-67, CK5/6, epidermal growth factor receptor (EGFR) and molecular subtypes (all P<0.05). Multivariate analysis showed that AR, HR and HER-2 were independent predictors for PCR (all P<0.05). Conclusions: The expressions of AR were more frequently in HR positive breast cancer tissues (86.7%), and lowest in triple-negative breast cancer (TNBC) group (23.2%). AR was independent predictor for PCR.

Expression of CDCA8 correlates closely with FOXM1 in breast cancer: public microarray data analysis and immunohistochemical study.

Forkhead Box M1 (FOXM1) is an oncogenic transcription factor implicated in breast cancer progression and metastasis. However, the clinical significance of FOXM1 and its associated signaling genes in human breast cancer still needed to be clarified. In this study, we first analyzed the co-expression gene pattern of FOXM1 in three breast cancer gene expression microarray datasets from the Oncomine database. Cell division cycle associated 8 (CDCA8) gene was identified to correlate closely with FOXM1. In silico analysis further indicated that CDCA8 overexpressed in breast cancer tissues compared with the normal controls is significantly associated with the triple-negative phenotype. Experimentally, we performed a immunohistochemical study to detect the expression of CDCA8 in 112 breast cancer samples, and evaluated its clinicopathological and prognostic significance. We found that CDCA8 was frequently over-expressed in breast cancer tissues, and increased expression of CDCA8 was positively associated with FOXM1 expression, triple-negative phenotype and shorter overall survival. Moreover, we also found that combination of CDCA8 and FOXM1 showed a higher hazard ratio than the individual markers. Our results suggest that FOXM1-CDCA8 signature might be involved in breast cancer progression, and serves as a potential prognostic factor and a promising therapeutical target.

Five lncRNAs associated with the survival of hepatocellular carcinoma: a comprehensive study based on WGCNA and competing endogenous RNA network.

OBJECTIVE: The competing endogenous RNA (ceRNA) presents a comprehensive regulatory network among lncRNAs, miRNAs and mRNA. The ceRNA provides significant information in understanding the pathology of cancer. This study aimed to explore a lncRNA-associated ceRNA network for predicting the overall survival of patients with hepatocellular carcinoma (HCC). MATERIALS AND METHODS: In this study, RNA-sequencing data of HCC were downloaded from The Cancer Genomes Atlas (TCGA) database. The module-trait relationship was analyzed with Weighted gene co-expression network analysis (WGCNA). The key module associated with tumor was identified, as well as the involved lncRNAs, mRNAs and miRNAs. The preliminary ceRNA network was constructed with Cytoscape. The survival analysis was further performed to screen survival-relevant lncRNAs, mRNAs and miRNAs, and then the survival-associated ceRNA network was reconstructed. RESULTS: Eventually, 5 lncRNAs, 10 miRNAs, and 25 mRNAs were included in the reconstructed ceRNA network. CONCLUSIONS: The identified lncRNAs were promising candidate biomarkers in HCC diagnosis and therapeutics. This analysis process was effective to construct ceRNA network. The result will be conductive to explore the significant lncRNAs and regulatory mechanism.

Atherosclerosis in transgenic mice overexpressing apolipoprotein A-II.

Concentrations of plasma high density lipoprotein (HDL) are inversely correlated with atherosclerotic coronary artery disease. The two most abundant protein constituents of HDL are apolipoproteins A-I and A-II (apoA-I and apoA-II). ApoA-I is required for assembly of HDL and, when overexpressed in transgenic mice, confers resistance to early atherosclerosis. The present studies reveal that transgenic mice that overexpress mouse apoA-II had elevated HDL-cholesterol concentrations but, nevertheless, exhibited increased atherosclerotic lesion development as compared to normal mice. The HDL in the transgenic mice was larger and had an increased ratio of apoA-II to apoA-I. Thus, both the composition and amount of HDL appear to be important determinants of atherosclerosis.

Immune-deficient mice develop typical atherosclerotic fatty streaks when fed an atherogenic diet.

Inbred strain C57BL/6J mice develop typical atherosclerotic fatty streaks in the aorta after 15 wk on a high fat, high cholesterol diet. To investigate the effects of the immune system on the development of fatty streaks in this model, C57BL/6J mice with a normal immune system were compared with C57BL/6J mice carrying mutations resulting in various immune deficiencies. These included mice with severe combined immune deficiency, athymic "nude" mice, class I MHC deficient mice, and class II MHC deficient mice. Despite similar lipoprotein profiles, lesion development in the immune compromised strains was similar to or increased compared with normal C57BL/6J mice. Class I MHC deficient mice demonstrated a threefold increase in lesion area (22,961 +/- 6,653 vs 8,868 +/- 1,817 microns2, P = 0.01). Immunohistochemical analysis of lesions showed characteristic features of atherosclerosis with vascular cell adhesion molecule-1 expression, immunoglobulin deposition, monocyte infiltration, and smooth muscle cell proliferation. These data indicate that the classical immune system, while not essential for atherosclerotic fatty streak development, may act to suppress the development of lesions.

Genetic evidence for a common pathway mediating oxidative stress, inflammatory gene induction, and aortic fatty streak formation in mice.

In a previous survey of inbred mouse strains on an atherogenic diet, we observed that the susceptibility to aortic atherosclerotic lesion formation was associated with the accumulation of lipid peroxidation products, induction of inflammatory genes, and the activation of NF-kB-like transcription factors (Liao, F., A. Andalibi, F. C. deBeer, A. M. Fogelman, and A.J. Lusis. 1993. J. Clin. Invest. 91:2572-2579). We hypothesized that the inflammation-related processes were stimulated by oxidized lipids, since injection of minimally oxidized LDL (MM-LDL) activated the same set of genes. We now report that the induction of inflammatory genes and activation of NF-kB-like transcription factors cosegregate with aortic atherosclerotic lesion formation in BXH recombinant inbred strains derived from parental C57BL/6J (susceptible) and C3H/HeJ (resistant) mice. In addition, the accumulation of hepatic conjugated dienes exhibited a significant correlation with inflammatory gene activation. These results provide strong evidence for the role of inflammatory mediators inducible by oxidative stress in atherogenesis. They also suggest that a major gene contributing to aortic lesion development in this mouse model, designated Ath-1, may control either the accumulation of lipid peroxides in tissues or the cellular responses to such lipid peroxides.

Reduced aortic lesions and elevated high density lipoprotein levels in transgenic mice overexpressing mouse apolipoprotein A-IV.

Transgenic mouse lines carrying several copies of the mouse apo A-IV gene were produced. Lipoprotein composition and function, and aortic lesion development were examined. Apo A-IV levels in the plasma of transgenic mice were elevated threefold compared with nontransgenic littermates on a chow diet, and sixfold in mice fed an atherogenic diet. Plasma concentrations of total cholesterol, HDL cholesterol, triglycerides, and free fatty acids were similar in transgenic and control mice fed a chow diet. However, with the atherogenic diet, male transgenic mice exhibited significantly higher levels of plasma triglycerides (P < 0.05), total cholesterol (P < 0.01), HDL cholesterol (P < 0.0001), and free fatty acids (P < 0.05), and lower levels of unesterified cholesterol (P < 0.05), than nontransgenic littermates. Expression of the apo A-IV transgene had a protective effect against the formation of diet-induced aortic lesions, with transgenics exhibiting lesion scores of approximately 30% those seen in control mice. HDL-sized lipoproteins isolated from transgenic mice fed the atherogenic diet promoted cholesterol efflux from cholesterol-loaded human monocytes more efficiently than comparable lipoproteins from nontransgenic counterparts. Plasma from transgenics also exhibited higher endogenous cholesterol esterification rates. Taken together, these results suggest that apo A-IV levels influence the metabolism and antiatherogenic properties of HDL.

Involvement of the tyrosinase gene in the deposition of cardiac lipofuscin in mice. Association with aortic fatty streak development.

Lipofuscin pigment, a terminal oxidation product, accumulates within cells during the normal aging process and under certain pathological conditions. We have analyzed a genetic cross between two inbred mouse strains, BALB/cJ and a subline of C57BL/6J, which differ in lipofuscin deposition. A comparison of the segregation pattern of cardiac lipofuscin with the albino locus (c) on mouse chromosome 7 revealed complete concordance. Analysis of spontaneous mutants of the tyrosinase gene, encoded by the albino locus, confirmed that the tyrosinase gene itself controls lipofuscin formation. Genetic analysis of other strains indicated that one or more additional genes cab contribute to the inheritance of lipofuscin. We also present evidence for an association between cardiac lipofuscin deposition and aortic fatty streak development in the mouse.

Heterozygous osteopetrotic (op) mutation reduces atherosclerosis in LDL receptor- deficient mice.

Previous studies of osteopetrotic (op) mice lacking macrophage colony-stimulating factor (M-CSF) have revealed an inhibition of atherosclerosis development in the apolipoprotein E (apo E)-deficient model and in a diet-induced model. Using LDL receptor-deficient mice, we now show that atheroma development depends on M-CSF concentration, as not only did homozygous osteopetrotic (op/op) mice have dramatically reduced lesions (approximately 0.3% of control lesion size) but heterozygous (op/+) mice had lesions < 1% of controls. Mice heterozygous for the op mutation (op/+) had plasma levels of M-CSF about half those in controls (+/+). The finding that an approximately 2-fold reduction in M-CSF expression reduced lesion size approximately 100-fold suggests the requirement for a threshold level of M-CSF. The effect of M-CSF on atherosclerosis did not appear to be mediated either by changes in plasma lipoprotein levels or alterations in the number of circulating monocytes, since both op/op and op/+ mice exhibited higher levels of atherogenic lipoprotein particles and (op/+) mice showed a near normal number of circulating monocytes. LDL receptor-null littermates of genotypes from op/op, op/+, to +/+ showed monocyte differentials of approximately 4.5, 8, and 10%, respectively. Taken together, these results suggest that the effects of M-CSF on atherogenesis may not be mediated by expression of M-CSF systemically or by modulation of the number of circulating monocytes. These studies support the conclusion that M-CSF participates critically in fatty streak formation and progression to a complex fibrous lesion.

New methods for time-resolved fluorescence spectroscopy data analysis based on the Laguerre expansion technique--applications in tissue diagnosis.

OBJECTIVES: A new deconvolution method for the analysis of time-resolved laser-induced fluorescence spectroscopy (TR-LIFS) data is introduced and applied for tissue diagnosis. METHOD: The intrinsic TR-LIFS decays are expanded on a Laguerre basis, and the computed Laguerre expansion coefficients (LEC) are used to characterize the sample fluorescence emission. The method was applied for the diagnosis of atherosclerotic vulnerable plaques. RESULTS: At a first stage, using a rabbit atherosclerotic model, 73 TR-LIFS in-vivo measurements from the normal and atherosclerotic aorta segments of eight rabbits were taken. The Laguerre deconvolution technique was able to accurately deconvolve the TR-LIFS measurements. More interesting, the LEC reflected the changes in the arterial biochemical composition and provided discrimination of lesions rich in macrophages/foam-cells with high sensitivity (> 85%) and specificity (> 95%). At a second stage, 348 TR-LIFS measurements were obtained from the explanted carotid arteries of 30 patients. Lesions with significant inflammatory cells (macrophages/foam-cells and lymphocytes) were detected with high sensitivity (> 80%) and specificity (> 90%), using LEC-based classifiers. CONCLUSION: This study has demonstrated the potential of using TR-LIFS information by means of LEC for in vivo tissue diagnosis, and specifically for detecting inflammation in atherosclerotic lesions, a key marker of plaque vulnerability.

The severity of coronary atherosclerosis at sites of plaque rupture with occlusive thrombosis.

Atherosclerotic plaque rupture with superimposed thrombosis is recognized as the lesion causing greater than 90% of acute myocardial infarctions. To determine the severity of atherosclerosis at the site of plaque rupture, 184 coronary arteries from autopsies of 162 patients who died of acute myocardial infarction were studied. There were 102 men, 72 +/- 10 years old (mean +/- SD), and 60 women, 75 +/- 8 years old. All arteries were dissected from the heart, fixed, decalcified, cut at 2 to 3 mm intervals and processed routinely for histologic examination. A planimeter was used to measure artery, plaque, thrombus and luminal cross-sectional area at the site of plaque rupture with thrombosis in sections projected at x13.8 magnification. At the site of atherosclerotic plaque rupture with superimposed thrombosis, the degree of stenosis due to plaque was: 90 +/- 7% for the right (n = 67), 91 +/- 6% for the left anterior descending (n = 79) and 91 +/- 6% for the left circumflex (n = 38) coronary arteries. Plaque rupture in fatal acute myocardial infarction occurs at sites of severe narrowing (mean 91%, range 67% to 99%). Thus, plaque rupture with thrombosis is unlikely to cause the fatal acute myocardial infarction in patients with mild to moderate coronary stenosis.

Direct gene transfer into donor hearts at the time of harvest.

Access to the donor heart at the time of harvest provides a unique opportunity for genetic manipulation of this organ before transplantation. We sought to determine (1) if donor mouse hearts express a foreign gene administered at harvest and, (2) if so, what route of gene delivery is most effective. At harvest, 30 micrograms of promoter cytomegalovirus-luciferase deoxyribonucleic plasmid in cationic liposomes was injected directly into the myocardial apex (group I), into the right atrium (group II), or into the coronary arteries (group III). The donor hearts were then transplanted into the abdomen of recipient mice of the same strain. The transplanted hearts were removed in 4 days and luciferase expression was assayed by immunohistochemistry. In group I, luciferase activity was localized to the apex. In group II, where plasmid was delivered into the right atrium, luciferase expression was detected in the right ventricle and sparsely in the coronary perivascular area. In group III, where plasmid was injected into the coronary arteries, the transplanted hearts demonstrated luciferase expression in (1) perivascular areas surrounding coronary arteries and veins, (2) coronary capillaries, and (3) the endocardia of both ventricles. This study suggests that (1) donor mouse hearts can be genetically modified at the time of harvest and (2) intracoronary infusion of plasmid yields the most effective method of delivery. Administration of plasmid in the coronary arteries localizes the expression to the endocardium and the coronary vasculature, both sites of immunologic interactions after heart transplantation.

Cytokine expression and endothelial cell and lymphocyte activation in human cardiac allograft rejection: an immunohistochemical study of endomyocardial biopsy samples.

We used monoclonal antibodies and immunohistochemical staining of frozen tissue sections to study the expression of cytokines in human cardiac allograft rejection. The 113 endomyocardial biopsy samples were stained for interleukin (IL)-2, IL-6, and interferon-gamma. The findings were compared to expression of the endothelial cell adhesion molecule ICAM-1, and the lymphocyte receptor for the adhesion molecule VCAM-1, VLA-4. Four biopsy samples from patients with idiopathic cardiomyopathy served as controls. IL-2 was not expressed in lymphocytes of controls and only occasionally in mild or moderate cellular rejection, humoral rejection, and Quilty lesions. IL-2 expression was prominent in severe cellular rejection. Interferon-gamma expression increased in proportion to the severity of cellular rejection and was not expressed in other conditions. IL-6 staining, which was only observed in occasional cases, was mild. Cytokine and adhesion molecule expression tended to increase with the severity of cellular rejection. This study shows that cytokine expression can be documented in human allograft endomyocardial biopsy samples with immunohistochemical techniques. The findings support the concept of an important role for cytokines in human cardiac allograft rejection.

Expression of cell adhesion molecules in human cardiac allograft rejection.

Adhesion of leukocytes to vascular endothelial cells is a critical step in a variety of inflammatory conditions. We studied the expression and distribution of intercellular adhesion molecule-1 (ICAM-1) and endothelial leukocyte adhesion molecule-1 (ELAM-1) in frozen sections of 83 endomyocardial biopsy specimens from human allograft hearts using monoclonal antibodies and an avidin-biotin complex-alkaline phosphatase staining technique. Cases with cellular or humoral rejection and Quilty lesions were studied. Staining was graded from 0 to 3+ in lymphocytes and in capillary, arterial, venular, and endocardial endothelial cells. Expression of ICAM-1 in capillaries increased with the severity of cellular rejection and was prominent in humoral rejection. ICAM-1 was also expressed in lymphocytes in proportion to the degree of rejection. Little or no ELAM-1 expression was noted. In Quilty lesions the intensity of ICAM-1 expression was similar to that of mild-to-moderate rejection. Thus adhesion molecule expression can be identified in endomyocardial biopsy specimens of patients with rejection, suggesting a role for adhesion molecules in the process of rejection. These findings may prove useful in monitoring rejection and its response to therapy and in developing specific antisera directed against these molecules.

Diagnosis of vulnerable atherosclerotic plaques by time-resolved fluorescence spectroscopy and ultrasound imaging.

In this study, time-resolved laser-induced fluorescence spectroscopy (TR-LIFS) and ultrasonography were applied to detect vulnerable (high-risk) atherosclerotic plaque. A total of 813 TR-LIFS measurements were taken from carotid plaques of 65 patients, and subsequently analyzed using the Laguerre deconvolution technique. The investigated spots were classified by histopathology as thin, fibrotic, calcified, low-inflamed, inflamed and necrotic lesions. Spectral and time-resolved parameters (normalized intensity values and Laguerre expansion coefficients) were extracted from the TR-LIFS data. Feature selection for classification was performed by either analysis of variance (ANOVA) or principal component analysis (PCA). A stepwise linear discriminant analysis algorithm was developed for detecting inflamed and necrotic lesion, representing the most vulnerable plaques. These vulnerable plaques were detected with high sensitivity (>80%) and specificity (>90%). Ultrasound (US) imaging was obtained in 4 carotid plaques in addition to TR-LIFS examination. Preliminary results indicate that US provides important structural information of the plaques that could be combined with the compositional information obtained by TR-LIFS, to obtain a more accurate diagnosis of vulnerable atherosclerotic plaque.