Interaction Study between Population Mobility and Economic Growth : Evidence from Chongqing

Based on economic convergence model and its derivatives, this paper examines the relationship between popultion mobility and economic growth in Chongqing and its five functional areas by using 2000~2013 panel data. The results show that there exists interactive relationship between population mobility and economic growth, and this interaction is rendered as mutual inhibition. The restrain from economic growth to population mobility shows smaller effect than the reverse. In the sparsely populated areas, economic growth is promoted by population mobility, and in the densely populated areas, economic growth is driven by investment. Therefore, government has to regulate population mobility to achieve sustainable economic growth.

A LIM Domain Protein from Tobacco Involved in Actin-Bundling and Histone Gene Transcription

The two LIM domain-containing proteins from plants （LIMs） typically exhibit a dual cytoplasmic-nuclear dis-tribution, suggesting that, in addition to their previously described roles in actin cytoskeleton organization, they partici-pate in nuclear processes. Using a south-western blot-based screen aimed at identifying factors that bind to plant histone gene promoters, we isolated a positive clone containing the tobacco LIM protein WLIM2 （NtWLIM2） cDNA. Using both green fluorescent protein （GFP） fusion-and immunology-based strategies, we provide clear evidence that NtWLIM2 local-izes to the actin cytoskeleton, the nucleus, and the nucleolus. Interestingly, the disruption of the actin cytoskeleton by latrunculin B significantly increases NtWLIM2 nuclear fraction, pinpointing a possible novel cytoskeletal-nuclear crosstalk. Biochemical and electron microscopy experiments reveal the ability of NtWLIM2 to directly bind to actin filaments and to crosslink the latter into thick actin bundles. Electrophoretic mobility shift assays show that NtWLIM2 specifically binds to the conserved octameric cis-elements （Oct） of the Arabidopsis histone H4A748 gene promoter and that this binding largely relies on both LIM domains. Importantly, reporter-based experiments conducted in Arabidopsis and tobacco proto-plasts confirm the ability of NtWLIM2 to bind to and activate the H4A748 gene promoter in live cells. Expression studies indicate the constitutive presence of NtWLIM2 mRNA and NtWLIM2 protein during tobacco BY-2 cell proliferation and cell cycle progression, suggesting a role of NtWLIM2 in the activation of basal histone gene expression. Interestingly, both live cell and in vitro data support NtWLIM2 di/oligomerization. We propose that NtWLIM2 functions as an actin-stabilizing protein, which, upon cytoskeleton remodeling, shuttles to the nucleus in order to modify gene expression.

Traditional Chinese Medicines alleviated myocardial ischemia by regulating Qi and promoting blood circulation

OBJECTIVE:To investigate the efficacy of Chinese medicines on Qi stagnation and blood stasis in rats with myocardial ischemia.METHODS:Fifty male Wistar rats were randomly divided into five groups(n=10)as follows:(a)sham operation(Sham),(b)myocardial ischemia(Model),(c)treatment that regulates Qi(Qi),(d)treatment that promotes blood circulation(Blood),(e)treatment that both regulates Qi and promotes blood circulation(QB).The rat model was established via activities restriction for 6 h followed by tail clamp stimulation for 5 mins every day for 7 d and occlusion left coronary anterior descending artery.Afterwards rats were treated with medicines that regulate Qi and/or promote blood circulation via gavage for 14 d.Behavioral parameters were evaluated using open field and elevated plus-maze tests.The tongue color and sublingual vein were visually examined.Blood flow perfusion of tongue and auricle were detected using PIMⅡ.The mesenteric microcirculation was examined via capillaroscopy,and hemodynamics was assessed using a polygraph system.Serum homocysteine(Hcy),creatine kinase isoenzyme(CKMB)levels and endothelin-1(ET-1)were measured.Hematoxylin and eosin staining and transmission electron microscopy were employed to detect the myocardial morphology and ultrastructure,respectively.RESULTS:Compared with findings in Sham group,rats in model group had coarse hair,dark mucosa of the lips and claw,low activity,and increased anxiety.Compared with findings in Model group,rats in the three treatment groups exhibited a lighter tongue color without an extended and varicose sublingual vein.There were significant increases of auricle blood flow perfusion in the Qi group and tongue bottom blood flow perfusion in the QB group.Compared with findings in Model rats,rats in Blood group exhibited improved mesenteric microcirculation associated with increased mesenteric blood flow and a larger arteriole diameter.Moreover,compared with findings in Model rats,Qi and QB rats exhibited increased left ventricular±dp/dtmax,decreased serum CKMB,Hcy,ET-1 levels,and reduced myocardial ultrastructural damage.CONCLUSION:Myocardial ischemia damage was suppressed by Traditional Chinese Medicines that regulate Qi and promote blood circulation.