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1.
J Int Med Res ; 47(5): 1936-1947, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30843447

RESUMO

OBJECTIVE: To explore correlations between body mass index (BMI), preoperative systemic immune-inflammation index (SII) and endocrine therapy resistance, and evaluate BMI and SII as predictors of resistance, in patients with luminal breast cancer. METHODS: This retrospective study included patients with luminal breast cancer who underwent endocrine therapy at Hebei General Hospital. Relationships between BMI and SII subgroups, and clinicopathological parameters were analysed using χ2-tests. Disease-free survival was assessed using Log-rank statistics. Multivariate analysis of factors related to disease progression were analysed using Cox proportional hazards model. RESULTS: Out of 161 patients, those with normal BMI and low SII had significantly lower endocrine resistance rates versus those with high BMI and SII, and BMI was significantly positively correlated with SII. High BMI or SII was associated with significantly lower disease-free survival rates. Hazard ratios for disease progression risk were 6.036, 3.508 and 1.733, for SII, BMI and TNM stage, respectively. CONCLUSION: In patients with luminal breast cancer, high BMI (>23 kg/m2) and SII (>518 × 109/L) levels may predict high endocrine resistance rates. BMI, SII and TNM stage were independent prognostic factors for endocrine therapy resistance.


Assuntos
Peso Corporal , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/patologia , Resistencia a Medicamentos Antineoplásicos , Hormônios/uso terapêutico , Inflamação/imunologia , Índice de Massa Corporal , Feminino , Humanos , Inflamação/patologia , Pessoa de Meia-Idade , Análise Multivariada , Modelos de Riscos Proporcionais , Curva ROC
2.
J Ind Microbiol Biotechnol ; 36(1): 139-47, 2009 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-18846398

RESUMO

Genome shuffling is a powerful strategy for rapid engineering of microbial strains for desirable industrial phenotypes. Here we improved the thermotolerance and ethanol tolerance of an industrial yeast strain SM-3 by genome shuffling while simultaneously enhancing the ethanol productivity. The starting population was generated by protoplast ultraviolet irradiation and then subjected for the recursive protoplast fusion. The positive colonies from the library, created by fusing the inactivated protoplasts were screened for growth at 35, 40, 45, 50 and 55 degrees C on YPD-agar plates containing different concentrations of ethanol. Characterization of all mutants and wild-type strain in the shake-flask indicated the compatibility of three phenotypes of thermotolerance, ethanol tolerance and ethanol yields enhancement. After three rounds of genome shuffling, the best performing strain, F34, which could grow on plate cultures up to 55 degrees C, was obtained. It was found capable of completely utilizing 20% (w/v) glucose at 45-48 degrees C, producing 9.95% (w/v) ethanol, and tolerating 25% (v/v) ethanol stress.


Assuntos
Embaralhamento de DNA , Resistência a Medicamentos , Etanol/metabolismo , Genoma Fúngico , Microbiologia Industrial , Saccharomyces cerevisiae/fisiologia , Temperatura Alta , Mutação , Saccharomyces cerevisiae/genética
3.
Nat Mater ; 5(12): 966-70, 2006 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-17128261

RESUMO

Aliphatic polyesters, such as poly(lactic acid), which degrade by hydrolysis, from naturally occurring molecules form the main components of biodegradable plastics. However, these polyesters have become substitutes for only a small percentage of the currently used plastic materials because of their poor thermal and mechanical properties. Polymers that degrade into natural molecules and have a performance closer to that of engineering plastics would be highly desirable. Although the use of a high-strength filler such as a bacterial cellulose or modified lignin greatly increases the plastic properties, it is the matrix polymer that determines the intrinsic properties of the composite. The introduction of an aromatic component into the thermoplastic polymer backbone is an efficient method to intrinsically improve the material performance. Here, we report the preparation of environmentally degradable, liquid crystalline, wholly aromatic polyesters. The polyesters were derived from polymerizable plant-derived chemicals--in other words, 'phytomonomers' that are widely present as lignin biosynthetic precursors. The mechanical performance of these materials surpasses that of current biodegradable plastics, with a mechanical strength, sigma, of 63 MPa, a Young's modulus, E, of 16 GPa, and a maximum softening temperature of 169 degrees C. On light irradiation, their mechanical properties improved further and the rate of hydrolysis accelerated.

4.
Guang Pu Xue Yu Guang Pu Fen Xi ; 22(3): 371-4, 2002 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-12938306

RESUMO

Rare earth (Eu)-polymer ternary complexes were synthesized using copolymer of 4-vinyl pyridine-methyl acrylate as ligand, and using phen and bipy as coordination ligand. The compositions of the complexes were characterized by FTIR and elemental analysis. The photophysical process of photoluminescence of the complexes were characterized by FTIR and elemental analysis. The photophysical process of photoluminescence of the complexes was discussed more fully by UV spectra and fluorescence spectra. The experiment result shows that the copolymer of 4-vinyl pyridine can coordinate into rare ions directly by nitrogen atom in the pyridine ring. When small ligand reacts with coordination, the fluorescence intensity of the complexes increases greatly because of stronger intermolecular energy transfer.


Assuntos
Acroleína/análogos & derivados , Európio/química , Luminescência , Acroleína/química , Metais Terras Raras/química , Compostos Organometálicos/síntese química , Compostos Organometálicos/química , Polímeros , Piridinas/química , Espectrometria de Fluorescência , Espectrofotometria Infravermelho
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