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581.
Bladder masses are represented by either benign or malignant entities. Malignant bladder tumors are frequent causes of disease and death in western countries. However, in children they are less common. Additionally, different features are found in childhood, in which non epithelial tumors are more common than epithelial ones. Rhabdomyosarcoma is the most common pediatric bladder tumor, but many other types of lesions may be found, such as malignant rhabdoid tumor (MRT), inflammatory myofibroblastic tumor and neuroblastoma. Other rarer tumors described in literature include urothelial carcinoma and other epithelial neoplasms. Rhabdomyosarcoma is associated to a variety of genetic syndromes and many genes are involved in tumor development. PAX3-FKHR and PAX7-FKHR (P-F) fusion state has important implications in the pathogenesis and biology of RMS, and different genes alterations are involved in the pathogenesis of P-F negative and embryonal RMS, which are the subsets of tumors most frequently affecting the bladder. These genes include p53, MEF2, MYOG, Ptch1, Gli1, Gli3, Myf5, MyoD1, NF1, NRAS, KRAS, HRAS, FGFR4, PIK3CA, CTNNB1, FBXW7, IGF1R, PDGFRA, ERBB2/4, MET, BCOR. Malignant rhabdoid tumor (MRT) usually shows SMARCB1/INI1 alterations. Anaplastic lymphoma kinase (ALK) gene translocations are the most frequently associated alterations in inflammatory myofibroblastic tumor (IMT). Few genes alterations in urothelial neoplasms have been reported in the paediatric population, which are mainly related to deletion of p16/lnk4, overexpression of CK20 and overexpression of p53. Here, we reviewed available literature to identify genes associated to bladder malignancies in children and discussed their possible relationships with these tumors. 相似文献
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Pape A. Diaw Olivier M.A. Mbaye Diene D. Thiar Nihal Oturan Mame Diabou Gaye‐Seye Atanasse Coly Bernard Le Jeune Philippe Giamarchi Mehmet A. Oturan Jean‐Jacques Aaron 《Luminescence》2019,34(5):465-471
Diflubenzuron (DFB) and fenuron (FEN) are benzoylurea and phenylurea pesticides, widely used in Senegal, that do not exhibit any natural fluorescence, but can be determined by means of photoinduced fluorescence (PIF) methods. Photodegradation of DFB and FEN yielded a number of fluorescent and non‐fluorescent photoproducts. For both pesticides, at least 10 photoproducts were detected and identified by gas chromatography–mass spectrometry (GC/MS). To identify the formed fluorescent DFB and FEN photoproducts, their fluorescence spectra were compared with those of standard compounds, including phenol and p‐hydroxyaniline. 相似文献
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Hussain Tabassum Li Jingsong Feng Xiaohui Asrar Hina Gul Bilquees Liu Xiaojing 《Journal of plant research》2021,134(4):779-796
Journal of Plant Research - Ion secretion facilitates recretohalophytes to tolerate saline and drought conditions but its relative contribution to the survival of many species remains poorly... 相似文献
584.
Acquired or innate resistance to chemotherapy is a major drawback of cancer therapeutics, which is frequently seen in epithelial cancers. However, the molecular mechanisms underlying chemotherapy resistance remain poorly understood. The mitochondrial pathway is a critical death pathway common to many different types of chemotherapy. Aberrations in this pathway can result in resistance to chemotherapy. The Bcl-2 family of proteins control commitment to programmed cell death by mitochondrial apoptosis. In this review, we will summarize the strategies in determining the components of apoptotic defects responsible for chemotherapy resistance, mainly focused on Bcl-2 protein network. 相似文献
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Lauren Rockwell Haiying Bao Francis Insaidoo Ijeoma Ikechukwu Nihal Tugcu Sunitha Kandula 《Biotechnology progress》2022,38(3):e3238
Purification of peptides typically includes expensive reverse phase (RP) processes, which utilize high pressure and large volumes of solvent. For two conjugated peptides, chromatography process development targeted a low-pressure aqueous process that could achieve target product purities of ≥95%, comparable to purities seen with traditional RP. A high throughput screening approach of different modalities was used to identify binding and elution conditions on a cation exchange resin and small-scale columns were used in order to assess impurity removal and process yield. The parameters for load and gradient elution were optimized to increase product purity and process productivity with a wide operating window identified where high purity and productivity are achieved. Computational modeling was then used to validate experimental chromatography results and to gain insight on the effect of the chemical modifications on the surface properties of the two peptides. Both modeling and experimental data showed that with optimization, cation exchange could be utilized as a single polishing step for conjugated peptides. Similar purities were achieved as those seen with RP with up to double the productivity. 相似文献
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Kavakcıoğlu Yardımcı Berna Geyikoglu Fatime Aysin Ferhunde Koc Kubra Simsek Ozek Nihal Küçükatay Vural 《Molecular biology reports》2021,48(5):4009-4019
Molecular Biology Reports - β-blockers having specific affinities to β-adrenergic receptors are routinely used to treat cardiovascular problems. Additionally, it has been demonstrated... 相似文献
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Ercument Cengiz Burcak Karaca Yuksel Kucukzeybek Gurbuz Gorumlu Mustafa K. Gul Cigdem Erten Harika Atmaca Selim Uzunoglu Bulent Karabulut Ulus A. Sanli Ruchan Uslu 《Molecular biology reports》2010,37(3):1269-1277
Drug resistance is a significant challenge of daily oncology practice. Docetaxel and gossypol both have antitumoral activity in hormone-refractory prostate cancer (HRPC). Our results revealed that docetaxel and gossypol were synergistically cytotoxic and apoptotic in PC-3 cells in a dose- and time-dependent manner. We further investigated the expression profiles of genes involved in drug resistance and metabolism with a Human Cancer Drug Resistance and Metabolism PCR Array® (SuperArray). Six of the 84 genes that are known to regulate drug resistance, metabolism, cell cycle, DNA repair and oncogenesis were downregulated ≥3-fold change by the combination treatment. These results may be important in devising mechanism-based and targeted therapeutic strategies for prostate cancer, especially in devising combination therapy for drug resistant prostate cancers. 相似文献