1.Improving the Fiscal Subsidy and Payment to Promote the Supply-Side Reform in Medical Service Field
Chinese Health Economics 2017;36(4):81-82
Based on the describing the effects and restricts of fiscal subsity and medical insurance payment on medical institutions and doctor behavior,the lead of fiscal subsidy and payment was managed as the important key for the supply-side reform in health service field,so as to promote the regression benefits for public hospitals,help to solve the core problems for new medical reform and achieve the main goal of medical service system reform.
2.Structural insight into enhanced calcium indicator GCaMP3 and GCaMPJ to promote further improvement.
Yingxiao CHEN ; Xianqiang SONG ; Sheng YE ; Lin MIAO ; Yun ZHU ; Rong-Guang ZHANG ; Guangju JI
Protein & Cell 2013;4(4):299-309
Genetically encoded Ca(2+) indicators (GECI) are important for the measurement of Ca(2+) in vivo. GCaMP2, a widely-used GECI, has recently been iteratively improved. Among the improved variants, GCaMP3 exhibits significantly better fluorescent intensity. In this study, we developed a new GECI called GCaMPJ and determined the crystal structures of GCaMP3 and GCaMPJ. GCaMPJ has a 1.5-fold increase in fluorescence and 1.3-fold increase in calcium affinity over GCaMP3. Upon Ca(2+) binding, GCaMP3 exhibits both monomeric and dimeric forms. The structural superposition of these two forms reveals the role of Arg-376 in improving monomer performance. However, GCaMPJ seldom forms dimers under conditions similar to GCaMP3. St ructural and mutagenesis studies on Tyr-380 confirmed its importance in blocking the cpEGFP β-barrel holes. Our study proposes an efficient tool for mapping Ca(2+) signals in intact organs to facilitate the further improvement of GCaMP sensors.
Calcium
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chemistry
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metabolism
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Calmodulin
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chemistry
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genetics
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metabolism
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Crystallography, X-Ray
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Dimerization
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Green Fluorescent Proteins
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chemistry
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genetics
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metabolism
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Histidine
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chemistry
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genetics
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metabolism
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Hydrogen-Ion Concentration
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Myosin-Light-Chain Kinase
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chemistry
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genetics
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metabolism
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Peptide Fragments
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chemistry
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genetics
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metabolism
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Protein Structure, Tertiary
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Recombinant Fusion Proteins
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biosynthesis
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chemistry
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genetics
3.Research progress on the mechanism of rapid antidepressant action of hydronorketamine
Xianqiang ZHANG ; Bo LIAN ; Changjiang LI ; Guohua LU ; Hongwei SUN ; Lin SUN
Chinese Journal of Behavioral Medicine and Brain Science 2020;29(2):183-188
Major depressive disorder is a mental illness characterized by depressed mood, lack of engagement in pleasurable activities, anhedonia, and cognitive-behavioral disorders. Currently, traditional pharmacological treatments for depression have a delayed therapeutic onset and low treatment effectiveness. (2R, 6R)-HNK, as a key metabolite of ketamine, can not only exert rapid and lasting antidepressant effects but also has no side effects such as hallucination and addiction caused by ketamine, which has potential clinical application values. Studies have found that the antidepressant effect of (2R, 6R)-HNK is closely related to the regulation mechanism of glutamate receptor and synaptic plasticity. Besides, the changes of downstream signaling pathways include the upregulation of brain-derived neurotrophic factor (BDNF) expression, dephosphorylation of eukaryotic elongation factor 2 (eEF2), and activation of the mammalian target of rapamycin (mTOR) play a key role in the antidepressant process of the drug. Understanding the molecular mechanisms underpinning (2R, 6R)-HNK's antidepressant effects will be invaluable for the identification of targets, which will drive the development of novel, effective, next-generation pharmacotherapies for the treatment of depression.
4.CT-guided diagnosis of banded vs membranaceous adhesive small bowel obstruction
Yong WEI ; Zhiyong CHEN ; Bingqiang LIN ; Tianran LIAO ; Junrong ZHANG ; Manduo OUYANG ; Xianqiang CHEN
Chinese Journal of General Surgery 2023;38(6):441-444
Objectives:To study the computed tomography features of banded adhesions(BA) and matted adhesions(MA) of adhesive small bowel obstruction(ASBO).Methods:We enrolled 150 patients operated on for ASBO. According to intraoperated findings, ASBO were classified into those caused by BA or MA. A multivariable logistic regression was established to analyze independent risk factors on Computed Tomography features.Results:There were significant differences in closed-loop sign (36.8% vs. 14.3%, P=0.002) mesenteric haziness (43.7% vs. 17.5%, P=0.001), beak sign (48.3% vs. 17.5%, P<0.001), fat notch sign (39.1% vs. 9.5%, P<0.001) and peritoneal fluid (54.0% vs. 34.9%, P=0.015) between the two groups. The presence of beak sign [ OR=6.15, 95% CI (2.55-14.84), P<0.001], fat notch sign [ OR=6.19, 95% CI (2.16-17.82), P=0.001] and mesenteric haziness [ OR=3.34, 95% CI (1.34-8.32), P=0.009] were independent risk factors with BA. Conclusion:Beak sign, fat notch sign and mesenteric haziness were independent risk factors for diagnosing BA.