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Kaeberlein M.,University of Washington | Kaeberlein M.,Guangdong Medical College | Kennedy B.K.,Guangdong Medical College | Kennedy B.K.,Buck Institute for Research on Aging | And 5 more authors.
Mechanisms of Ageing and Development | Year: 2011

The " Trinations Aging Symposium" was held on the campus of Guangdong Medical College in Dongguan, China from April 28 to 30, 2011. The goal was to promote interaction, collaboration, and exchange of ideas between scientists in the field of aging research from Japan, South Korea, and China. Aging research is on the rise in Asia. This represents an important development, since Korea and Japan are the two longest-lived countries in the world, and life expectancy is increasing rapidly in China and other Asian countries. The world will see a greater percentage of people over age 65 in coming years than any period in human history. Developing therapeutic approaches to increase healthspan has the potential not only to enhance quality of life, but would also help stem the looming economic crisis associated with a high percentage of elderly. The focus of the Trinations Aging Symposium was on the basic biology of aging, and topics discussed included genome maintenance, metabolism and aging, longevity genes and interventions, and new therapies for age-related diseases. The meeting finished with a commitment for another symposium next year that will include additional Asian countries and the formation of a new scientific organization, the Asian Association for Aging Research. © 2011.

Huang H.,Southern Medical University | Wu Y.,Affiliated Hospital of Guangdong Medical University | Liao D.,Guangdong Medical University | Liao D.,Key Laboratory for Epigenetics of Dongguan City | And 2 more authors.
Minerva Medica | Year: 2016

INTRODUCTION: Previous studies about the possible link between genetic polymorphisms of interleukin-10 (IL-10) and nasopharyngeal carcinoma (NPC) risk offer controversial results, and the sample sizes recruited in these trials were relatively modest. To further determine this association, a comprehensive analysis was performed in the present study. EVIDENCE ACQUISITION: Eligible studies were selected from PubMed, Embase, Chinese National Knowledge Infrastructure (CNKI), China Biological Medicine Database and Wanfang Database. A total of 623 cases and 1,018 controls for the IL-10 -1082G/A polymorphism, 463 cases and 862 controls for the IL-10 -819T/C polymorphism, and 463 cases and 862 controls for the IL-10 -592A/C polymorphism were finally included in this meta-analysis. EVIDENCE SYNTHESIS: Pooled odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the strength of the association by fixed-effects or random-effects models according to heterogeneity. In the present analysis, a strong relationship between the -1082G/A polymorphism in IL-10 promoter and NPC susceptibility was found in all genetic models [allele, 0.65 (0.45-0.94), P=0.02; co-dominant, 0.15 (0.06-0.38), P<0.0001;, dominant 14.37 (2.86-72.09), P=0.001; and recessive fashions, 0.56 (0.45-0.71), P<0.0001)]. However, NPC risk was linked to -592A/C or -819T/C polymorphism in IL-10 promoter only in the co-dominant model in both genetic situations [for -819T/C, 0.36 (0.17-0.78), P=0.01; for -592A/C, 0.39 (0.19-0.80), P=0.01]. CONCLUSIONS: Our study has shown that the IL-10 -1082G/A polymorphism might be associated with increased risk of NPC under all genetic models. However, NPC risk is linked to -592A/C or -819T/C polymorphism in IL-10 promoter only in the co-dominant model in both genetic situations. ©2016 Edizioni Minerva Medica.

Liu B.,Guangdong Medical College | Liu B.,Key Laboratory for Medical Molecular Diagnostics of Guangdong Province | Chen W.-C.,Guangdong Medical College | Liu X.-G.,Guangdong Medical College | And 2 more authors.
Progress in Biochemistry and Biophysics | Year: 2012

Caloric restriction(CR) can delay aging and the onset of aging-related diseases. Sirtuin plays a key role in the aging process regulated by CR because of its ability to sense the metabolic status and to integrate into adaptive transcriptional outputs. Sirtuin regulates the aging process by altering protein activity and stability through lysine acetylation. Moderate CR in yeast influences replicative lifespan and chronological lifespan mainly by increasing the NAD +/NADH ratio and regulating the level of nicotinamide. Similar mechanism also exist among Caenorhabditis elegans and Drosophila melanogasters. SIRT1 protein level increases in response to CR in mammals, leading to an increase in PNC1/Nampt expression, which favors the synthesis of NAD + from NAM, potentially acting as a major mechanism to drop the leash of SIRT1 inhibition. NO up-regulates SIRT1 and mitochondrial biogenesis. Cellular and organism's senescence may be influenced through the deacetylation of histone, p53, NES1, FOXO by SIRT1, indicating sirtuin and its homologous analogues play important roles in aging process and lifespan extension under CR in different organisms.

Wang G.-H.,Guangdong Medical University | Huang G.-L.,Guangdong Medical University | Huang G.-L.,Key Laboratory for Medical Molecular Diagnostics of Guangdong Province | Zhao Y.,Guangdong Medical University | And 5 more authors.
Journal of Materials Chemistry B | Year: 2016

Stimuli-responsive nanocarriers for anticancer drug and gene co-delivery are a promising strategy in cancer therapy due to their combination of chemotherapy and gene therapy. In this work, we developed a facile and effective method to fabricate stimuli-responsive nanocarriers for anticancer drug and gene co-delivery based on complexes of polyethylenimine (PEI) with an adenosine triphosphate (ATP) responsive aptamer duplex (ARAD). No chemical reactions or complex modifications were used in the construction processes. In this system, Doxorubicin-loaded aptamer duplex and plasmid DNA (p53) can be bound by PEI by electronic interactions to form stable complexes which effectively protect the aptamer and p53 from DNase degradation. The intercalated Dox can be released on-demand by a structural change in the aptamer duplex in an ATP-rich environment. The morphology and average size of the nanocarriers were characterized by zeta potential and transmission electron microscopy (TEM). The nanocarriers exhibit lower cell toxicity in HeLa cell lines relative to PEI. RT-PCR and Western blot analysis confirmed that p53 could be effectively delivered and expressed in HeLa cells by PEI/ARAD/p53 complexes. Moreover, the apoptosis percentage of HeLa cells treated with PEI/ARAD/Dox/p53 complex increased to 40.8%, compared to 24.7% for PEI/ARAD/Dox complex and 11.5% for PEI/ARAD/p53, respectively. The result demonstrated that the combinatorial delivery of Dox and p53 by nanocarriers could induce synergistic actions and lead to effective cancer cell apoptosis. © 2016 The Royal Society of Chemistry.

Lu Y.,Guangdong Medical College | Lu Y.,Key Laboratory for Medical Molecular Diagnostics of Guangdong Province | Huang G.-L.,Guangdong Medical College | Huang G.-L.,Key Laboratory for Medical Molecular Diagnostics of Guangdong Province | And 9 more authors.
Molecular Biology Reports | Year: 2013

Peptidylprolyl cis/trans isomerase, NIMA-interacting 1 (PIN1) plays an important role in cell transformation and oncogenesis. Association between PIN1 promoter polymorphisms and cancer risk was reported in several cancers. This study aimed to evaluate the association between two single nucleotide polymorphisms (SNPs, -667T>C, rs2233679 and -842G>C, rs2233678) on PIN1 promoter and risk of nasopharyngeal carcinoma (NPC). The two SNPs were genotyped using polymerase chain reaction-restriction fragment length polymorphism in a total of 334 native Chinese subjects consisting of 178 cases and 156 controls. The results indicated that the -667CT heterozygote and -667CC homozygote exhibited a significantly decreased risk of nasopharyngeal carcinoma when compared with -667TT homozygote (OR = 0.639, 95 % CI = 0.452-0.903, p = 0.011 for -667CT; and OR = 0.441, 95 % CI = 0.213-0.915, p = 0.038 for -667CC, respectively). In the -842G>C polymorphism, compared with -842GG homozygote, only -842CG heterozygote but not -842CC homozygote had a significantly decreased risk of nasopharyngeal carcinoma (OR = 0.465, 95 % CI = 0.249-0.871, p = 0.010). Genotype in the two SNPs in patients showed no significant associations with the clinicopathologic features examined. Our study showed that the minor genotypes of PIN1 promoter (-667CT, -667CC and -842CG) were associated with decreased risk of NPC in a Chinese population, suggested that PIN1 promoter polymorphisms might play an important role in NPC carcinogenesis. © 2012 Springer Science+Business Media Dordrecht.

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