The present study was aimed to investigate the influence of thoracic epidural blockade on hypoxia-induced pulmonary hypertension in rats.Forty eight Wistar rats were randomly divided into 4 equal groups, named normoxia hypoxia hypoxia/ ropivacaine and hypoxia/saline. Animals were placed in a hypoxia chamber and instrumented with epidural catheters at the thoracic level. Rats were injected with saline or ropivacaine. Haemodynamic measurements included pulmonary artery pressure and right ventricular hypertrophy. Degree of pulmonary vascular remodeling was determined by Hematoxylin and Eosin (HE) staining. Serum cyclic GMP (cGMP) and TNF-α were measured using radioimmuno assay. Real-time PCR and western boltting were employed to examine the expression of cAMP responding-element binding protein (CREB).We found that the thoracic epidural blockade significantly decreased chronic hypoxia-induced pulmonary hypertension and vascular remodeling in rats. Ropivacaine-treated rats exhibited significantly lower mean pulmonary artery pressure (mPAP), ratio of right ventricular weight to left ventricular plus septal weight (RV/(LV+S)) and wall thickness of pulmonary artery compared with those of control rats. Hypoxia-induced increase in levels of serum cGMP and TNF-α was reversed by thoracic epidural blockade. Moreover, hypoxia increased expression of CREB at mRNA and protein levels which could be suppressed by thoracic epidural blockade.Thoracic epidural blockade reduced mPAP and serum level of TNF-α and increased cGMP. The treatment reversed upregulated expression of CREB at mRNA and protein production.
To investigate the expressions of Urotensin II (UII) protein and mRNA and its receptor (UT) mRNA of medium and small pulmonary arteries of rats with chronic thromboembolic pulmonary hypertension.The Wistar rats were injected thrombi through the jugular vein 2 times in 2 weeks and tranexamic acid was injected peritoneally once daily during the experiment to prevent thrombolysis. The mean pulmonary artery pressure (mPAP) was measured using right cardiac atheterzation. The expressions of UII protein in pulmonary arteries were studied by immunohischemistry with a polycolonal antibody. The expressions of UII mRNA and UT mRNA were detected by in situ hybridization using UII and UT oligonuclear probes. The changes of structures in pulmonary vessle were observed, including relative medial thickness of pulmonary artery (PAMT) and vessle wall area/total vessle area (WA/TA).The mPAP of the 4 weeks to the 12 weeks groups were (19.9 +/- 6.2) mm Hg (1 mm Hg = 0.133 kPa), (23.8 +/- 4.1) mm Hg and (27.4 +/- 5.4) mm Hg, higher than that of the control group (F = 13.75, P < 0.01, respectively). The PAMT of the 4 weeks to the 12 weeks groups were (42.6 +/- 11.16)%, (47.82 +/- 10.02)% and (53.79 +/- 10.41)%, and WA/TA of the 4 weeks to the 12 weeks groups were (22.75 +/- 6.79)%, (25.32 +/- 4.90)% and (27.05 +/- 7.71)%, both changed significantly as compared to the control group (F = 5.52 and 6.61, P < 0.01, respectively; P < 0.05 in 4 weeks group; P < 0.01 in 8 weeks and 12 weeks groups, respectively). The expressions of UIIprotein, UII mRNA and UT mRNA in the 4 weeks to the 12 weeks groups were obviously higher than the control group (F = 30.39, 30.78 and 14.49, P < 0.01, respectively), and their expressions were more marked in the small pulmonary arteries than in medium pulmonary arteries. The expressions of UIIprotein, UII mRNA and UT mRNA were positively correlated with mPAP and PAMT. The pulmonary vascular remodeling was time-dependently aggravated after embolism (r: 0.822, 0.866 and 0.846; 0.675, 0.712 and 0.756, P < 0.01, respectively).The expressions of UII protein, UII mRNA and UT mRNA of pulmonary arteries in the animal models were higher than those in the control group. These dynamic changes of UII mRNA, UIIprotein and UT mRNA may contribute to the development of pulmonary hypertension and vascular remodeling after pulmonary thromboembolism.
Objective: In the acid-fast staining experiment of pathological tissues, sulfuric acid and hydrochloric acid were used to evaluate the staining results, so as to get the best staining method. Methods: Using sulfuric acid differentiation solution and hydrochloric acid differentiation solution, the paraffin blocks of pathological tissues known to contain Mycobacterium tuberculosis were compared to evaluate the staining effect. Results: When 0.5% hydrochloric acid differentiation solution is used and the differentiation time is 6 s, the dyeing effect is better than that of sulfuric acid differentiation solution.
Abstract A fluorescent Fe3+ probe ((C10H7NO2)2B18H20, M1) by introducing two isoquinoline-1-carboxylic acid group into the 6,9-position of anti-B18H22 was designed and synthesized. The structure of M1 was investigated by 1H NMR, MS, FT-IR and theoretical calculation, and its optical properties were characterized with UV-Vis and PL. M1 showed aggregation induced emission enhancement(AIEE) properties in THF/H2O solution, and exhibited excellent selectivity toward Fe3+ in THF/H2O (v/v, ƒw=95%) solution with a detection limit of 1.93×10-5 M. The interaction mechanism of probes with Fe3+ was attributed to the involvement of intermolecular charge transfer (ICT) process. Furthermore, a optical fiber fluorescent Fe3+ sensor based on M1 sensing film was developed, the detection limit of the optical fiber Fe3+ fluorescent sensor could be improved to13.8pM, the ultra-low detection limit is superior to most reported fluorescent probes (or sensors) towards Fe3+. This method has the advantages of high sensitivity, anti-interference and easy to operate, and has great potential in the field of the analysis of environmental and biological samples.
To evaluate the correlation between the expressions of intercellular adhesion molecule-1 (ICAM-1) and tissue inhibitor of metalloproteinase-1 (TIMP-1) and matrix metalloproteinase-9 (MMP-9) in lung tissues of patients with COPD.Lung tissues from patients with COPD (COPD group, n = 19) and those without COPD (smokers and nonsmokers with normal lung function, n = 11 and 9, respectively) were obtained from surgical excisions of lung cancer patients. The mRNA expression of ICAM-1, TIMP-1 and MMP-9 was detected using semi-quantitative RT-PCR. The protein expression of ICAM-1, TIMP-1 and MMP-9 was detected by using immunohistochemistry method.There were significant differences in FEV1% and FEV1/FVC% among smokers without COPD, nonsmokers without COPD and COPD patients. MMP-9 was highly expressed in alveolar epithelial cells, bronchial epithelial cells, vascular smooth muscle cells, alveolar macrophages, and interstitial cells in the COPD group, compared with smokers without COPD group and nonsmokers without COPD group (54.0 +/- 15.0), (1.2 +/- 0.7) and (1.4 +/- 0.8). Low level expression of TIMP-1 was detected in alveolar macrophages, alveolar epithelial cells and vascular smooth muscle cells in the COPD group, but no expression in smokers and nonsmokers without COPD. High level expression of ICAM-1 was detected in alveolar epithelial cells, and the expression was higher in the COPD group (52.1 +/- 13.4), (2.1 +/- 1.1) and (4.5 +/- 2.4). The mRNA level of MMP-9 showed significant difference among patients with COPD, smokers without COPD and nonsmokers without COPD (0.71 +/- 0.16), (0.20 +/- 0.08) and (0.17 +/- 0.05). The mRNA level of TIMP-1 was also significantly different among patients with COPD, smokers without COPD and nonsmokers without COPD (0.47 +/- 0.10), (0.26 +/- 0.08) and (0.20 +/- 0.06). ICAM expression was also significantly higher in patients with COPD as compared with smokers without COPD and nonsmokers without COPD (0.62 +/- 0.15), (0.44 +/- 0.12) and (0.37 +/- 0.11). Both the mRNA and the protein levels of MMP-9 were inversely correlated with FEV1 % and FEV1/FVC% (r= -0.759, -0.756, -0.772, -0.725, respectively, P <0.01). TIMP-1 mRNA level was inversely correlated with FEV1% and FEV1/FVC% (r = -0.675, -0.623, respectively P <0.01). Negative correlations were also noted between ICAM-1 expressions (both mRNA and protein) and FEV1% or FEV1/FVC% (r = -0.580, -0.531, -0.739, -0.756, respectively P <0.01). Interestingly, the mRNA expression of TIMP-1, MMP-9 and ICAM-1 was positively correlated (r = 0.576, 0.524, P < 0.01), while the protein levels of MMP-9 and ICAM-1 were positively correlated (r = 0.964, P <0.01).There was a significant correlation between over-expression of ICAM-1 and TIMP-land MMP-9 in lung tissues from COPD patients. Over-expressions of ICAM-1 in the lung may result in accumulation of inflammatory cells releasing certain inflammatory factors that could destroy the normal lung structure. In addition, highly expressed TIMP-1 and MMP-9 in lung tissues may also contribute to the destruction and reconstitution of the bronchial or/and alveolar wall, which is likely to play a major role in airway obstruction.
Objective: To explore the relationships between serum lipoprotein-associated phospholipase A2 (Lp-PLA2) and KIM-based white matter lesion (WML) and carotid atherosclerotic plaque. Methods: From November 2018 to July 2019, 155 patients admitted to the Department of Neurology of the First Affiliated Hospital of Anhui Medical University were enrolled, with 125 cases of brain MRI manifestations of white matter lesions allocated to WML group and 30 cases of normal MRI in control group (NC group). According to KIM classification, WML patients were further divided into juxtaventricular white matter lesion (JVWML) group (n=30), periventricular white matter lesion (PVWML) group (n=33), juxtacortical white matter lesion (JCWML) group (n=30) and deep white matter lesion (DWML) group (n=32). Clinical Data of vascular risk factors in all subjects was collected and reviewed. Serum Lp-PLA2 content was determined by double-antibody sandwich enzyme-linked immunosorbent assay (ELISA). Carotid atherosclerosis plaques were detected by carotid artery ultrasonography and divided into stable and vulnerable plaques, and thus total score of each plaque was subsequently calculated according to the Crouse method. Results: The Lp-PLA2 ((117±37) ng/ml vs (95±30) ng/ml), stable Crouse plaque integral (CPI) (0 (0,2.5) vs 0) and unstable CPI (0 (0,3.4) vs 0) in the WML group were significantly higher than those in the NC group (all P<0.05). Lp-PLA2 ((138±41) ng/ml) and unstable CPI (1.5(0,3.8)) in the PVWML group were significantly higher than those in the NC group (all P<0.05). Lp-PLA2 levels in the PVWML group were significantly higher than those in the JVWML group ((100±28) ng/ml) and JCWML group ((101±27) ng/ml) (all P<0.05). Correlation analysis revealed that blood glucose (r=0.600, P=0.000), triglyceride (TG) (r=0.371, P=0.034), low-density lipoprotein cholesterol (LDL-C) (r=0.367, P=0.036) and Lp-PLA2 (r=0.567, P=0.001) were positively correlated with unstable CPI in PVWML group, while it is negatively correlated with HDL-C (r=-0.368, P=0.035). Multivariate linear regression of all relevant factors and unstable CPI in the PVWML group showed that blood glucose (b=0.463, P<0.01) and Lp-PLA2 (b=0.347, P<0.05) were still positively correlated with unstable CPI. Conclusions: Serum Lp-PLA2 is an indicator of atherosclerosis, which is associated with carotid instability plaques in periventricular WML, suggesting that inflammatory mechanism plays an important role in the development of ischemic white matter lesions.目的： 探讨血清脂蛋白相关磷脂酶A2（Lp-PLA2）与基于KIM分型脑白质病变（WML）以及颈动脉粥样硬化斑块的相关性。 方法： 收集2018年11月至2019年7月于安徽医科大学第一附属医院神经内科以头痛或头晕起病的住院患者155例，其中头颅MRI表现为WML者125例（WML组），头颅MRI正常30例作为对照组（NC组）。WML组患者根据KIM分型分为脑室旁组（JVWML组）（n=30）、近脑室组（PVWML组）（n=33）、近皮质组（JCWML组）（n=30）、深部组（DWML组）（n=32）。调查所有受试对象血管危险因素临床资料并记录；采用双抗体夹心酶联免疫吸附法（ELISA）对所有受试对象血清Lp-PLA2含量进行测定；应用颈动脉超声检测颈动脉粥样硬化斑块并分为稳定性和不稳定性斑块，并按照Crouse法计算各自斑块总积分。 结果： WML组Lp-PLA2[（117±37）ng/ml比（95±30）ng/ml]、稳定斑块积分[0（0,2.5）分比0分]、不稳定斑块积分[0（0,3.4）分比0分]均明显高于NC组（均P<0.05）；PVWML组Lp-PLA2[（138±41）ng/ml]和不稳定斑块积分[1.5（0,3.8）分]明显高于NC组（均P<0.05）；PVWML组Lp-PLA2水平明显高于JVWML组[（100±28）ng/ml]、JCWML组[（101±27）ng/ml]（均P<0.05）。相关分析显示，PVWML组不稳定斑块积分与血糖（r=0.600, P=0.000）、TG（r=0.371, P=0.034）、LDL-C（r=0.367, P=0.036）、Lp-PLA2（r=0.567, P=0.001）呈正相关，与HDL-C呈负相关（r=-0.368, P=0.035）。将PVWML组所有相关因素与不稳定斑块积分进行多元线性回归显示：血糖（b=0.463, P<0.01）、Lp-PLA2（b=0.347, P<0.05）与不稳定斑块积分仍呈正相关。 结论： 血清Lp-PLA2是反映动脉粥样硬化的一项指标，其与近脑室型WML颈动脉不稳定性斑块存在一定的相关性，提示炎症机制在缺血性WML发生发展中起重要作用。.
Objective
To explore the long-term effects of radiation injury and to provide scientific basis for the evaluation of the effects of ionizing radiation injury by carrying out medical follow-up of patients involved in the 5.7 radiative source accident in Nanjing in 2014.
Methods
Through interviewing and investigating, we inquired about the new disease history of the exposed patients from rehabilitation treatment to medical follow-up peroid. Physical and laboratory examinations were carried out. According to relevant standards, physiological and biochemical indexes such as hematopoietic system, immune system, endocrine system, ophthalmology, circulatory system, digestive system, urinary system and bone mineral density were systematically evaluated, with the long-term effects being evaluated.
Results
The patient′s vital signs were good without new diseases. The indexes of hematopoietic system, immune system and endocrine system tended to be normal, the circulatory system, digestive system and urinary system showed degenerative changes, the ophthalmic examination showed visual acuity continue to decline, and bone mineral density examination indicated low bone mass.
Conclusions
Physiological and biochemical indicators of the patients gradually returned to normal without obvious symptoms of radiation damage. Further medical follow-up observation still needs to continue.
Key words:
Radiation emergency; Acute radiation sickness; Radiation damage; Long-term effect; Medical follow-up
This paper analyzes the recently epidemic status of schistosomiasis, the change of natural and social factors, and field survey and evaluation data of schistosomiasis in Ya'an City after Lushan Earthquake on April 20, 2013, and proposes that it is necessary to strengthen the conventional schistosomiasis control measures, the control of exogenous infection sources, the control of Oncomelania hupensis snails and health education for ensuring no major epidemics after the disaster. This paper also recommends the direction and suggestions for future schistosomiasis control in Ya' an City.
Objective To evaluate the clinical value of LAM-IgG in diagnosing active pulmonary tuberculosis. Methods The serum LAM-IgG of 471 tuberculosis patients and 102 non-tuberculosis patients were detected with tuberculosis quick diagnostic outfit. Results The sensitivity of LAM-IgG in diagnosing active tuberculosis was 64 percent, the specificity was 83. 3 percent. In diagnosing active pulmonary tuberculosis the sensitivity was 80. 5 percent. The positive consistency between serum LAM-IgG and sputum examination for tubercle bacillus was 64. 1 percent. Among active pulmonary tuberculosis patients 73. 6 percent recovered. Conclusion Serum LAM-IgG is proved to be a useful anxiliary examination in diagnosing pulmonary tuberculosis.
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