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The hippocampus plays an important role in fear learning and memory processing.It is a key brain area in the pathogenesis of post-traumatic stress disorder (PTSD). Neuroimaging studies have confirmed that the hippocampal structure and functional connectivity of patients with PTSD are abnormal, but the changes in hippocampal subregions are still unclear.The results of brain structure studies showed that the cornu ammonis and dentate gyrus atrophy in adult PTSD patients and the symptom of re-experience may be related to pattern separation dysfunction caused by reduced dentate gyrus neurogenesis.Among children diagnosed with PTSD, there is no significant change found in cornu ammonis and dentate gyrus, while atrophy in presubiculum was observed, which could result in fear extinction and deficits in episodic memory.The alteration of hippocampal volume in PTSD may have a gender-specific lateralization phenomenon.The results of brain function studies show that the functional connectivity of hippocampal subregions in PTSD patients is selectively damaged, especially the connectivity with key brain regions in the default mode network is reduced.This article systematically reviews the structural and functional connectivity changes of hippocampal subregions in patients with PTSD from the perspective of neuroimaging, in order to promote the understanding of the pathogenesis of PTSD and identify the therapeutic targets of hippocampal subregions.
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Objective: To study the microstructure development of mandibular bone in rats on timing sequence and under different occlusal force. Methods: 63 male SD rats aged 23 days were randomly divided into three groups (n = 7): Baseline group, soft-diet (SD) group and hard-diet (HD) group. 7 rats were killed at week 0, 2, 4, 6 and 8 respectively after feeding the food with different hardness.Micro-CT was used to reconstruct and analysis microstructure of the region of interest in mandible of the rats. Results: Compared with HD group, bone volume/total volume (BV/TV) and trabecular thickness (Tb. Th) decreased significantly after 4 th week (P ＜ 0. 05), the bone surface/bone volume (BS/BV) and trabecular separation (Tb. Sp) increased significantly during the 4 th to the 6 th week (P ＜0. 05) . Conclusion: In the process of mandibular development in rats, reduction of occlusal force may lead to reduction of bone mass, and the changes of microstructure are closely related to the time of intervention.
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<p><b>OBJECTIVE</b>To understand the knowledge of acupuncture disease spectrum, expectation of acupuncture treatment in Chengdu residents.</p><p><b>METHODS</b>A questionnaire regarding the knowledge of acupuncture disease spectrum and expectation of acupuncture treatment in Chengdu residents was established. By field sampling and internet survey, related data were collected and analyzed.</p><p><b>RESULTS</b>Totally 1 548 valid questionnaires were collected, including 1 041 from field survey and 507 from internet survey. The results indicated the knowledge of acupuncture and its disease spectrum were moderate in Chengdu residents; among the disease spectrum of acupuncture, the disease with the highest cognition was insomnia, accounting for 45.0% in field survey and 75.4% in internet survey; while the disease with the lowest cognition was infertility, accounting for 8.3% in field survey and 34.3% in internet survey.</p><p><b>CONCLUSIONS</b>The knowledge of acupuncture in Chengdu residents could be further improved, and the promotion of popular science of acupuncture should be strengthened in future.</p>
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<p><b>OBJECTIVE</b>This study aims to observe the expression of Sclerostin during movement of orthodontic teeth and determine the effect of this protein on remodeling of periodontal tissues.</p><p><b>METHODS</b>Twenty-four Wistar rats were chosen. Orthodontic forces were applied between the bilateral incisor and first molar to achieve mesial movement. Rats in each group were executed at different time points (0, 1, 3, 5, 7, 14 d). Morphology of periodontal tissue was observed by hematoxylin-eosin (HE) staining. The number of osteoclasts were observed by tartrate-resistant acid phosphatase (TRAP) staining. Sclerostin expression were observed by immunohistochemical staining.</p><p><b>RESULTS</b>HE staining revealed that the resorption of alveolar bone intensified with prolonged movement. Results of immunohistochemical and TRAP staining revealed that Sclerostin expression and number of osteoclasts were related to duration of movement of orthodontic tooth. After staining for 5 days, the number of osteoclasts and Sclerostin expression reached their peak and then began to decline. The numbers of osteoclasts and the expression level of Sclerostin were higher at the compressive side than those at the tensive side.</p><p><b>CONCLUSION</b>Sclerostin affected orthodontic tooth movement by inhibiting the Wnt signaling pathway and by indirectly or directly controlling bone morphogenetic protein.</p>
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Animals , Rats , Bone Morphogenetic Proteins , Metabolism , Genetic Markers , Incisor , Molar , Movement , Osteoclasts , Periodontal Ligament , Metabolism , Periodontium , Rats, Wistar , Tooth Movement TechniquesABSTRACT
OBJECTIVE:To analyze the dyeing status of cinnabar and its pieces,and provide reference for its quality clinical safetey appicaton. METHODS:TLC was used for the qualitative identification of amaranth,carmine,erythrosine,acid red 73, 808 udan and indirubin. HPLC-MS was used to detect the 808 udan :HPLC conditions were as follows,column was Acquity UPLC BEH C18 with mobile phase of cetonitrile-0.1% formic acid(70∶30,V/V)at a flow rate of 0.3 ml/min,the detection wave-length was 520 nm;MS conditions were as follows,ion source was electrospray ionization source,scanning mode was positive ion scanning with full scanning tandem mass spectrometry,nebulizer pressure was 30 psi,drying gas was nitrogen,ion spray voltage was 4 000 V,collision energy was 30 V,and the injection volume was 5 μl. The volumetric method was used for content determi-nation of HgS. RESULTS:TLC spots of amaranth,carmine,erythrosine,acid red 73,808 udan and indirubin were clear and well-separated. 4 batches of 808 udan dyeing were included in the 18 batches of samples,6 batches had non-compliance contents (including 3 batches of 808 udan dyeing). CONCLUSIONS:Dyeing-doped and other quality problems exist in the cinnabaris in markets,which should be noticed.
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Leptin is a protein hormone produced mainly by obese gene and secreted by adipose tissue and exerts the biological effects through leptin receptors. With the progress in research on the function and receptor signal transduction related leptin and leptin resistance, it has been found that leptin is associated with the development and progression of many cardiovascular diseases, such as hypertension and left ventricular hypertrophy. Some studies have reported that leptin resistance is the pathologic basis for a variety of cardiovascular diseases. This paper will briefly review the advances in the study of correlation between leptin and hypertensive-left ventricular hypertrophy (HLVH), focusing on the relationship between leptin and various factors related to HLVH, such as sympathetic nervous system, renin angiotensin aldosterone system, growth factors, inflammatory factors and insulin resistance.
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Humans , Adipose Tissue , Cardiovascular Diseases , Hypertension , Hypertrophy, Left Ventricular , Insulin Resistance , Leptin , Physiology , Receptors, Leptin , Renin-Angiotensin System , Sympathetic Nervous SystemABSTRACT
OBJECTIVE:To establish a method for the content determination of rosin acid in Rheumatoid arthritis tablet. METH-ODS:HPLC was performed on the column of ZORBAX SB-C18 with mobile phase of acetonitrile-0.1% formic acid(82∶18,V/V) at flow rate of 1.0 ml/min ,detection wavelength was 241 nm ,column temperature was 30 ℃ and volume injection was 10 μl. MS/MS column was ZORBAX SB-C18 with mobile phase of acetonitrile-0.1% formic acid(80∶20,V/V)at flow rate of 0.2 ml/min;column temperature was 30 ℃;volume injection was 0.5 μl. Ionization mode was ESI+,atomization gas pressure was 25 psi,gas flow as 8.0 L/min,capillary voltage was 4 000 V,capillary outlet voltage was 120 V,precursor ion was 303 m/z,scan range was 50-500 m/z and the gas temperature was 350 ℃. RESULTS:The linear range of rosin acid was 2.5-100.0 μg/ml. RSDs of preci-sion,stability and reproducibility tests were lower than 2.0%,recoveries was 96.75%-98.11%(RSD=0.53%,n=6). CONCLU-SIONS:The method is simple,accurate and reproducible,and suitable for the content determination of rosin acid in Rheumatoid arthritis tablet.
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Objective To analyze the relationship between serum intermedin ( IMD ) , CystatinC ( CysC ) and fibro-blast growth factor23(FGF23) with hypertensive left ventricular hypertrophy (HLVH). Methods Serum IMD,Cy-sC and FGF23 levels of 30 patients with essential hypertension(EH group),30 hypertensions with LVH(HLVH group)and 30 healthy subjects(control group)were detected by enzyme-linked immunosorbent assay(ELISA). All the subjects did UCG for LVMI. Results LVMI and serum IMD,CysC,FGF23 levels were significantly higher in EH group than in control(P<0. 05),higher in HLVH group than in EH and control groups(P<0. 05). In the pa-tients with hypertension LVMI and serum IMD,CysC,FGF23 levels were increasing with increased blood pressure levels. LVMI level was positively correlated with serum IMD,CysC and FGF23 levels(r=0. 769,0. 517,0. 700;P<0. 01). Line to LVMI level as the dependent variable,multiple stepwise regression analysis showed that:systolic blood pressure( SBP) ,IMD,CysC,homocysteine( Hcy) ,FGF23 entered regression equation. They were independent risk factors for LVMI. Conclusion Serum IMD, CysC and FGF23 levels are closely associated with EH and HLVH. They may participate in the development of EH and affect the process of HLVH. Combined-detection of ser-um IMD,CysC and FGF23 can be used as a reference index for the condition and prognosis of HLVH.
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Objective This research aimed to investigate the function mechanism of lung injury after acute pulmonary embolism.Methods 30 healthy New Zealand rabbits were selected and randomly divided into five groups:control group (with venepuncture applied) and model groups including none-saline (NS) control group,exogenos laptin low doses group,medium dose group and high dose group.ELISA was applied to examine the TNF-αand IL-1β in serum.Results TNF-α and IL-1β content in saline group were higher than that in control group,and the results were statistically significant.In medium dose (50 μg/kg) group,TNF-α and IL-1β levels decreased apparently and the results were statistically significant.In low doses (20 μg/kg) group,TNF-α and IL-1β levels decreased,but the results were not statistically significant.In high dose (100 μg/kg) group,TNF-α and IL-1β levels increased on the contrary.Conclusion Suitable dose of leptin will lead the decrease of postoperative levels of TNF-α and IL-1β after acute pulmonary embolism,which thus have protection function to the injured lung.
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<p><b>OBJECTIVE</b>To investigate the metabolites in rat urine after orally administrating gossypetin-8-O-beta-D-glucuronide.</p><p><b>METHOD</b>Gossypetin-8-O-beta-D-glucuronide was administrated orally at the dose of 250 mg x kg(-1) to healthy rats, then the urine was collected, pre-treated appropriately and detected by HPLC-DAD-MS(n).</p><p><b>RESULT</b>In the rat urine, gossypetin-8-O-beta-D-glucuronide, along with 6 metabolites, were detected, and their structures were elucidated on the basis of reference standards, UV and MS(n) spectra. The metabolic pathways of gossypetin-8-O-beta-D-glucuronide included mainly deglycosylation, glucuronidation and methylation.</p><p><b>CONCLUSION</b>A rapid and sensitive method for the analysis of metabolites in rat urine after orally administrating gossypetin-8-O-beta-D-glucuronide was established and this will be useful for the further metabolism study of gossypetin-8-O-beta-D-glucuronide.</p>
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Animals , Male , Rats , Administration, Oral , Chromatography, High Pressure Liquid , Flavonoids , Metabolism , Magnetic Resonance Spectroscopy , Rats, Sprague-DawleyABSTRACT
Objective: To study the expression of hepatocyte growth factor(HGF) in acute pulmonary embolism, and the diagnostic value of HGF thereof. Methods: The acute autoblood pulmonary thromboembolism was used to establish rat pulmonary embolism model. There were blood plasma HGF detection group,organization HGF mRNA detection group and control group respectively. The expressions of plasma HGF and organization HGF were observed during the different periods of acute pulmonary embolism. Results:The expression of HGF was much higher in blood plasma HGF detection group than that of control group at different time points(P ＜ 0.01). The expression of HGF mRNA increased in organization HGF detection group compared with that of control group at 12 h after pulmonary embolism(P ＜ 0.01). Conclusion: The expression of HGF increased in acute pulmonary embolism, which can be used as a diagnosis indicator in acute pulmonary embolism.
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AIM:To observe the effect of levcromakalim(Lev) on endthelin-1(ET-1) induced proliferation and the expression of protein kinase C(PKC) in cultured rat vascular smooth muscle cells(VSMCs).METHODS: VSMCs were isolated from rat aorta and were cultured with different concentrations of Lev in vitro after stimulated to proliferation by ET-1(10~(-8)(mol?L~(-1))).Vitality of VSMCs was detected by MTT;DNA replication was evaluated by 3H-TdR method.Flow cytometry was used to analyze cell cycle and apoptosis.The expression of PKC? protein and mRNA were determined by Western blot and reverse transcription-polymerase chain reaction(RT-PCR).RESULTS:Vitality of VSMCs and 3H-TdR intermingle rate were decreased(P
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0.05,while the left ventricle weight index correlated with both leptin concentrations in the early phase of AMI with P0.05.CONCLUSION:Leptin is involved in the progress of AMI in the experimental SD rats.An increase in leptin level during AMI may signify myocardial deterioration.