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Articles by Hui Huang
Total Records ( 5 ) for Hui Huang
  Guowei Zhou , Hui Huang , Ziniu Yu , Zhijun Dong and Yuanchao Li
  Free-living Symbiodinium have been the focus of considerable attention among coral reef researchers because they represent a source of symbionts for both recently recruited corals and adult corals that are subject to environmental stress (e.g. climate change). We evaluated the genetic diversity of free-living Symbiodinium in seawater collected from the Xisha Islands in the South China Sea using sequence analysis of the hypervariable region of the chloroplast 23S. We sequenced a total of 267 cloned gene fragments representing Symbiodinium in clades A, B, C, D, F, and G, of which 34 were distinct types. The diversity of free-living Symbiodinium types was high at all sites. The majority of Symbiodinium sequences belonged to clade C. There was no significant difference in Symbiodinium sequence types among sites or depths. Our results highlight the high diversity of free-living Symbiodinium pools in the coral reef environment and provide a foundation for future studies of the spatiotemporal distribution of Symbiodinium. Such information is critical to understand and predict the influence of symbiotic dinoflagellates on the adaptation of their host to environmental changes.
  Weihua Zhou , Kedong Yin , Aimin Long , Hui Huang , Liangmin Huang and Dedi Zhu
  The spatial and seasonal dynamics of total and size-fractionated phytoplankton biomass (chlorophyll- a) as well as physical and chemical factors in the Yangtze River Estuary and adjacent East China Sea coastal waters were investigated from April 2002 to February 2003. Average surface total and water column integrated chlorophyll a biomass showed a clear seasonal variation in response to the Yangtze River discharge, with the highest in summer (~4 mg m-3 and >60 mg m-2), intermediate in spring and autumn (~1 mg m-3 and 26–28 mg m-2), and the lowest in winter (0.5 mg m-3 and <20 mg m-2). Summer maximum chlorophyll a concentrations (>10 mg m-3) occurred at intermediate salinities (~20–30) region beyond the front zone between 112.5°E and 123°E with sufficient nutrients replenishment for phytoplankton growth. Generally, spatial distribution of size-fractionated phytoplankton showed that phytoplankton biomass was dominated by the large size fraction (>20 μm) in the turbid eutrophic estuarine and near-shore waters, while the small-sized phytoplankton (<5 μm) were dominant in the offshore stations. Phosphate was the main limiting nutrient of phytoplankton biomass in river diluted water and most near-shore stations, while dissolved inorganic nitrogen became the potential limiting nutrient in some offshore stations, except for summer when phosphate limited almost all in the whole investigation region. Controlling the inputs of phosphate loading from the Yangtze River is one of the most effective strategies for reducing the increasing eutrophication and occurrences of harmful algal blooms in Yangtze River Estuary and adjacent East China Sea coastal waters.
  Xiubao Li , Sheng Liu , Hui Huang , Liangmin Huang , Zhiyou Jing and Chenglong Zhang
  Luhuitou fringing reef, which has been seriously affected by human activities and terrestrial runoff, has degraded quickly in recent decades. However, direct impact by hyperthermal stress has probably been minimal because of the influence of the Qiongdong upwelling in summer. Seawater temperature anomalies in 2010 resulted in mean monthly seawater temperatures in summer to be 1–2°C higher than in the same period of the 3 preceding years. Moderate coral bleaching at Luhuitou fringing reef was observed in the summer of 2010 due to high thermal stress. Montipora was the most susceptible taxon, whereas Galaxea fascicularis and Pocillopora damicornis were among the least susceptible taxa. Mortality of Montipora was 21.7%, whereas for the remaining taxa it was less than 5%. No mortality was observed for tabular Acropora, G. fascicularis, P. damicornis, Favites and Leptoria. Most taxa showed relatively high bleaching in larger colonies compared with that in smaller ones. Juvenile coral colonies showed less bleaching (3%) than adult coral colonies (28%). Our study suggested that although most taxa in the survey area might recover from this moderate coral bleaching episode, coral reproduction in the year following bleaching may be adversely affected.
  Hui Peng , Xiaoqiang Zhuang , Yu Bai , Xu Fang , Hui Huang and Shenglin Lu
  Background and Objective: P2Y11 is a sub type of purinergic receptors that altered the function of immune cells. Present study evaluates the beneficial effect of P2Y11 receptor blockage on rheumatoid arthritis (RA). Methodology: Arthritis was induced by the intraplantar injecting the mixture of complete freund’s adjuvant (CFA) and type II collagen in left hind paw. P2Y11 receptor was blocked by P2Y11 receptor antagonist (NF340). All the animals were separated in to five groups like control group, negative group (Rheumatoid arthritis group), NF340 0.3, 10 and 30 μM/day injected intrathecally for the period of 21 days. Development of RA was estimated by arthritic score, paw swelling and paw withdrawal latency. Pro-inflammatory cytokines in the synovial fluid, anti-type II collagen antibodies in serum and proliferation of T-cell was estimated in RA rats. Results: Data of the study reveals that treatment with NF340 attenuates the development of RA. There was significant (p<0.01) decrease in the pro-inflammatory cytokines in NF340 treated group compared to negative control group. Moreover treatment with NF340 significantly reduced anti-type II collagen antibodies and increase in the proliferation of T-cells compared to negative control group. Conclusion: Present investigation proves that gene expression of P2Y11 receptor blocked by NF340 attenuates the RA by ameliorating the cellular and humoral immunity.
  Yan Li , Hui Huang and Yue-Wei Guo
  A new norsesquiterpene, sinunorcaryophyllenol (1), together with four known related terpenoids (2-5) have been isolated from Hainan soft coral Sinularia sp. The structure of the new compound was elucidated on the basis of detailed spectroscopic data analysis and by comparison with related model compounds.
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