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排序方式: 共有183条查询结果,搜索用时 31 毫秒
31.
Adolfo Paolin Diletta Trojan Antonio Leonardi Stefano Mellone Antonio Volpe Augusto Orlandi Elisa Cogliati 《Cell and tissue banking》2016,17(3):399-406
The aim of this work was to compare the effects on human amniotic membrane of freeze-drying and γ-irradiation at doses of 10, 20 and 30 kGy, with freezing. For this purpose, nine cytokines (interleukin 10, platelet-derived growth factor-AA, platelet-derived growth factor-BB, basic fibroblast growth factor, epidermal growth factor, transforming growth factor beta 1, and tissue inhibitors of metalloproteinase-1, -2, and -4) were titrated in 5 different preparations for each of 3 amniotic membranes included in the study. In addition, the extracellular matrix structure of each sample was assessed by transmission electron microscopy. While freeze-drying did not seem to affect the biological structure or cytokine content of the different amniotic membrane samples, γ-irradiation led to a significant decrease in the tissue inhibitors of metalloproteinase-4, basic fibroblast growth factor and epidermal growth factor, and induced structural damage to the epithelium, basement membrane and lamina densa. The higher the irradiation dose the more severe the damage to the amniotic membrane structure. In conclusion, the Authors recommend processing amniotic membrane under sterile conditions to guarantee safety at every step rather than final sterilization with γ-irradiation, thereby avoiding alteration to the biological characteristics of the amniotic membrane. 相似文献
32.
The recapitulation of primary tumour heterogenity and the existence of a minor sub-population of cancer cells,capable of initiating tumour growth in xenografts on serial passages, led to the hypothesis that cancer stem cells(CSCs) exist. CSCs are present in many tumours, among which is breast cancer. Breast CSCs(BCSCs) are likely to sustain the growth of the primary tumour mass, as wellas to be responsible for disease relapse and metastatic spreading. Consequently, BCSCs represent the most significant target for new drugs in breast cancer therapy. Both the hypoxic condition in BCSCs biology and proinflammatory cytokine network has gained increasing importance in the recent past. Breast stromal cells are crucial components of the tumours milieu and are a major source of inflammatory mediators. Recently, the antiinflammatory role of some nuclear receptors ligands has emerged in several diseases, including breast cancer. Therefore, the use of nuclear receptors ligands may be a valid strategy to inhibit BCSCs viability and consequently breast cancer growth and disease relapse. 相似文献
33.
Orlandi A Oliva F Taurisano G Candi E Di Lascio A Melino G Spagnoli LG Tarantino U 《Amino acids》2009,36(4):755-763
Osteoarthritis is a progressive joint disease characterized by cartilage degradation and bone remodeling. Transglutaminases
catalyze a calcium-dependent transamidation reaction that produces covalent cross-linking of available substrate glutamine
residues and modifies the extracellular matrix. Increased transglutaminases-mediated activity is reported in osteoarthritis,
but the relative contribution of transglutaminases-2 (TG2) is uncertain. We describe TG2 expression in human femoral osteoarthritis
and in wild-type and homozygous TG2 knockout mice after surgically-induced knee joint instability. Increased TG2 levels were
observed in human and wild-type murine osteoarthritic cartilage compared to the respective controls. Histomorphometrical but
not X-ray investigation documented in osteoarthritic TG2 knockout mice reduced cartilage destruction and an increased osteophyte
formation compared to wild-type mice. These differences were associated with increased TGFβ-1 expression. In addition to confirming
its important role in osteoarthritis development, our results demonstrated that TG2 expression differently influences cartilage
destruction and bone remodeling, suggesting new targeted TG2-related therapeutic strategies. 相似文献
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35.
Laura Di Renzo Fabio Galvano Carmine Orlandi Alessia Bianchi Claudia Di Giacomo Luca La Fauci Rosaria Acquaviva Antonino De Lorenzo 《Obesity (Silver Spring, Md.)》2010,18(11):2125-2130
The normal‐weight obese (NWO) syndrome was identified in women whose body weight (BW) and BMI are normal but whose fat mass (FM) is >30%. In these subjects, an early inflammatory status has been demonstrated. The aim was to verify whether oxidative stress occurs in NWO. Sixty age‐matched white Italian women were studied and subdivided as follows: 20 normal‐weight individuals (NW) (BMI <25 kg/m2; FM% <30%); 20 NWO (BMI <25 kg/m2; FM% >30%); 20 preobese‐obese (OB) (BMI >25 kg/m2; FM% >30%). Anthropometric, body composition (by dual‐energy X‐ray absorptiometry) variables, plasma levels of some cytokines, reduced glutathione (GSH), lipid hydroperoxide (LOOH), nitric oxide (NO) metabolites (NO2?/NO3?), antioxidant nonproteic capacity (ANPC) were measured and compared between groups. Glucose and lipid metabolism parameters were assessed. GSH and NO2?/NO3? levels resulted lower in OB and NWO compared to NW (P < 0.01). LOOH levels resulted higher in OB and NWO (P < 0.01). ANPC in NWO was lower than NW but higher with respect to OB (P < 0.01). Correlation analysis revealed strong associations between GSH levels and BW, BMI, FM% (R = ?0.45, at least P < 0.05); waist circumference (W) (R = ?0.33, P < 0.05); FFM% (R = 0.45, P < 0.01); IL‐1α, IL‐6, IL‐10, IL‐15 (R = ?0.39, ?0.33, ?0.36 ?0.34, respectively, P < 0.05); triglycerides (R = ?0.416, P < 0.05). LOOH levels were negatively related to FFM% (R = ?0.413, P < 0.05) and positively to FM%, IL‐15, TNF‐α, insulin, total cholesterol, low‐density lipoprotein cholesterol, and triglycerides (R = 0.408, R = 0.502, R = 0.341, R = 0.412, R = 0.4036, R = 0.405, R = 0.405, respectively, P < 0.05). The study clearly indicates that NWO, besides being in early inflammatory status, are contextually exposed to an oxidative stress related to metabolic abnormalities occurring in obesity. 相似文献
36.
M. Scimeca A. Orlandi I. Terrenato S. Bischetti E. Bonanno 《European journal of histochemistry : EJH》2014,58(3)
Human cardio-respiratory diseases are strongly correlated to concentrations of atmospheric elements. Bioaccumulation of heavy metals is strictly monitored, because of its possible toxic effects. In this work, we utilized the EDX microanalysis in order to identify the potential heavy metal accumulation in the lung tissue. To this aim, we enrolled 45 human lung biopsies: 15 non-small cell lung cancers, 15 lung benign lesions and 15 control biopsies. Lung samples were both paraffin embedded for light microscopy study and epon-epoxid embedded for transmission electron microscopy. EDX microanalysis was performed on 100 nm thick unstained ultrathin-sections placed on specific copper grids. Our results demonstrated that the EDX technology was particularly efficient in the study of elemental composition of lung tissues, where we found heavy metals, such as Cobalt (Co), Chromium (Cr), Manganese (Mn) and Lead (Pb). Furthermore, in malignant lesions we demonstrated the presence of multiple bio-accumulated elements. In fact, a high rate of lung cancers was associated with the presence of 3 or more bio-accumulated elements compared to benign lesions and control tissue (91.7%, 0%, 8.3%, respectively). The environmental impact on pulmonary carcinogenesis could be better clarified by demonstrating the presence of polluting agents in lung tissues. The application of EDX microanalysis on biological tissues could shed new light in the study of the possible bioaccumulation of polluting agents in different human organs and systems.Key words: EDX microanalysis, transmission electron microscopy, non-small cell lung cancer, heavy metals, environmental pollution 相似文献
37.
Chang Gong Ziliang Cheng Yaping Yang Jun Shen Yingying Zhu Li Ling Wanyi Lin Zhigang Yu Zhihua Li Weige Tan Chushan Zheng Wenbo Zheng Jiajie Zhong Xiang Zhang Yunjie Zeng Qiang Liu R.Stephanie Huang Andrzej L.Komorowski Eddy S.Yang Fran?ois Bertucci Francesco Ricci Armando Orlandi Gianluca Franceschini Kazuaki Takabe Suzanne Klimberg Naohiro Ishii Angela Toss Mona P.Tan Mathew A Cherian Erwei Song 《中国科学:生命科学英文版》2022,65(11):2205-2217
Patients with hormone receptor(HR)-positive tumors breast cancer usually experience a relatively low pathological complete response(p CR) to neoadjuvant chemotherapy(NAC). Here, we derived a 10-micro RNA risk score(10-mi RNA RS)-based model with better performance in the prediction of p CR and validated its relation with the disease-free survival(DFS) in 755 HRpositive breast cancer patients(273, 265, and 217 in the training, internal, and external validation sets, respectively). This model,pres... 相似文献
38.
Fabio Orlandi Herminia Garcia-Mozo Carmen Galán Bruno Romano Consuelo Diaz de la Guardia Luis Ruiz Maria del Mar Trigo Eugenio Dominguez-Vilches Marco Fornaciari 《International journal of biometeorology》2010,54(2):151-163
The aim of this study was to investigate the main climatic and biological trends related to olive flowering in central-southern
Italy compared to those in Andalusia, Spain. Results since 1982 were compared for the two long-series monitoring areas of
Cordoba and Perugia, and since 1992–1999 for the short-series areas. The relationship between climatic trends and the biological
response of the olive, a widespread culture in the Mediterranean basin, were investigated. An aerobiological method involving
capturing pollen released into the atmosphere was utilised as a bioindicator of flowering phenology. The study results confirm
the strong relationship between flowering periods and spring temperature trends for the olive. Temperature during March, April
and May was the parameter most related to flowering date in the study areas, particularly in Italy. In some cases we found
a significant correlation between flowering and past autumn temperatures, probably due to their effect on floral bud dormancy
induction, but this phenomenon appeared to be of minor importance in the studied areas. The phenological trend results show
the continuous advance of flowering dates to the late 1990s, followed by a relatively stationary time series related to a
short-term temperature fluctuation in the Mediterranean area. This latter period probably represents a mesoscale event forced
by a macroscale event—the North Atlantic Oscillation. The results reveal that the trend towards increased temperatures, and
the consequent flowering advance of some species, indicated some years ago is nowadays not as clear as was expected and should
be confirmed over the next few years in the Mediterranean areas under investigation. 相似文献
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