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1.
World J Clin Cases ; 9(10): 2367-2372, 2021 Apr 06.
Article in English | MEDLINE | ID: mdl-33869615

ABSTRACT

BACKGROUND: Nocardia cyriacigeorgica (N. cyriacigeorgica) infection is uncommon in clinical practice. Pulmonary sequestration complicated with N. cyriacigeorgica has not been reported in the literature. Here, we present a case of pulmonary se-questration complicated with N. cyriacigeorgica infection in an immunocom-petent woman. CASE SUMMARY: A 37-year-old woman complaining of a recurrent cough was admitted to our hospital. Pulmonary sequestration in the lower lobe of the left lung was diagnosed by enhanced computed tomography. Bronchoalveolar lavage fluid was then collected, which showed gram positive bacilli with weakly positive modified acid-fast staining. The pathogen was identified as N. cyriacigeorgica after bacterial culture and mass spectrometry analysis. The patient was diagnosed with pulmonary sequestration complicated with N. cyriacigeorgica infection, and her symptoms quickly improved following anti-infective therapy. CONCLUSION: Nocardiosis is considered to be an opportunistic infection. This is the first report of pulmonary sequestration complicated with N. cyriacigeorgica infection in a patient with normal immunity.

2.
Medicine (Baltimore) ; 99(25): e19929, 2020 Jun 19.
Article in English | MEDLINE | ID: mdl-32569155

ABSTRACT

INTRODUCTION: Resection of a large intratracheal tumor with severe obstruction via flexible bronchoscope remains a formidable challenge to anesthesiologists. Many artificial airways positioned proximal to tracheal obstruction can not ensure adequate oxygen supply. How to ensure effective gas exchange is crucial to the anesthetic management. PATIENT CONCERNS: Five patients of intratracheal tumor occupying 70% to 85% of the tracheal lumen were scheduled for tumor resection via flexible bronchoscope. DIAGNOSIS: The patients were diagnosed with intratracheal tumor based on their symptoms, radiographic findings and tracheoscopy. INTERVENTIONS: We describe a technique of high frequency jet ventilation (HFJV) using an endobronchial suction catheter distal to tracheostenosis during the surgery, which ensured the good supply of oxygen. We applied general anesthesia with preserved spontaneous breathing. A comprehensive anesthesia protocol that emphasizes bilateral superior laryngeal nerve (SLN) block and sufficient topical anesthesia. An endobronchial suction catheter was introduced transnasally into the trachea and then advanced through the tracheostenosis with the tip proximal to the carina under direct vision with the aid of fiber bronchoscope. HFJV was then performed through the suction catheter. OUTCOMES: The SPO2 maintained above 97% during the surgery. Carbon dioxide retention was alleviated obviously when adequate patency of the trachea lumen achieved about 30 min after the beginning of surgery. HFJV was ceased and all patients had satisfactory spontaneous breathing at the end of the procedure. CONCLUSION: HFJV at the distal end of tracheostenosis is a suitable ventilation strategy during flexible bronchoscopic resection of a large intratracheal tumor.


Subject(s)
Bronchoscopy/methods , High-Frequency Jet Ventilation , Tracheal Neoplasms/surgery , Aged , Female , Humans , Male , Middle Aged
3.
World J Clin Cases ; 7(22): 3838-3843, 2019 Nov 26.
Article in English | MEDLINE | ID: mdl-31799312

ABSTRACT

BACKGROUND: Adult retropharyngeal abscess (RPA) is extremely rare, and most cases reported in the literature were related to tuberculous infection. We present a case of RPA with acute airway obstruction as the main manifestation in a 66-year-old woman that was considered to be non-tubercular suppurative inflammation in the retropharyngeal space. CASE SUMMARY: A 66-year-old woman complaining of chills and fever was admitted to our hospital. She was initially diagnosed with an acute upper respiratory tract infection. She lost consciousness twice during hospitalization. She regained consciousness immediately upon emergency tracheal intubation. Acute upper airway obstruction was suspected as arterial blood gas analysis showed obvious acute retention of carbon dioxide before the second tracheal intubation. The diagnosis of RPA was confirmed by computed tomography and magnetic resonance imaging. Kocuria kristinae was isolated from blood samples taken from both hands. The patient recovered and was subsequently discharged after receiving antibiotic therapy together with surgical incision and drainage of the abscess. CONCLUSION: Clinicians should be alert to the possibility of RPA in patients with acute airway obstruction. Surgical incision and drainage is an effective treatment for RPA.

4.
Afr Health Sci ; 19(2): 2073-2081, 2019 Jun.
Article in English | MEDLINE | ID: mdl-31656491

ABSTRACT

BACKGROUND: Repeatedly hospitalized patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD) are often exposed to more antibiotics, but the distribution of pathogenic bacteria in these patients is poorly understood. The objectives of this study were to analyze the distribution of pathogenic bacteria and the risk factors associated with multidrug-resistant (MDR) bacteria infection in early re-admission patients with AECOPD. METHODS: We retrospectively reviewed charts for patients with AECOPD admitted to our hospital between January 2011 and November 2012. The early re-admission group and non-early readmission group were determined by whether patients were readmitted within 31 days after discharge. Detection of potentially pathogenic microorganisms (PPMs) and MDR bacteria were analyzed. Logistic regression analysis was performed to identify independent risk factors for MDR bacteria infection. RESULTS: PPMs were isolated from 230 (32.0%) cases of respiratory tract specimens; MDR bacteria accounted for 24.7% (57/230). Pseudomonas aeruginosa (43.7%), Klebsiella pneumoniae (15.6%), and Acinetobacter baumannii (12.5%) were the top three PPMs in the early readmission group, while the top three PPMs in the non-early readmission group were K. pneumoniae (23.7%), P. aeruginosa (21.2%), and Streptococcus pneumoniae (17.1%). Multivariate analysis showed that use of antibiotics within 2 weeks (odds ratio [OR] 8.259, 95% confidence interval [CI] 3.056-22.322, p = 0.000) was the independent risk factor for MDR bacteria infection. CONCLUSION: Non-fermentative Gram-negative bacilli (NFGNB) and enterobacteria were the predominant bacteria in early readmission patients with AECOPD. The detection rate of MDR bacteria was high which was related to the use of antibiotics within 2 weeks before admission in these patients.


Subject(s)
Anti-Bacterial Agents/therapeutic use , Bacterial Infections/drug therapy , Bacterial Infections/microbiology , Patient Readmission/statistics & numerical data , Pulmonary Disease, Chronic Obstructive/drug therapy , Pulmonary Disease, Chronic Obstructive/microbiology , Acute Disease , Aged , Aged, 80 and over , China , Drug Resistance, Multiple, Bacterial , Female , Humans , Male , Middle Aged , Retrospective Studies , Risk Factors
5.
J Korean Med Sci ; 32(3): 439-447, 2017 Mar.
Article in English | MEDLINE | ID: mdl-28145647

ABSTRACT

This study explored the relationship between the fractional exhaled nitric oxide (FeNO) level and the efficacy of inhaled corticosteroid (ICS) in asthma-chronic obstructive pulmonary disease (COPD) overlap syndrome (ACOS) patients with different disease severity. A total of 127 ACOS patients with ACOS (case group) and 131 healthy people (control group) were enrolled in this study. Based on the severity of COPD, the ACOS patients were divided into: mild ACOS; moderate ACOS; severe ACOS; and extremely severe ACOS groups. We compared FeNO levels, pulmonary function parameters including percentage of forced expiratory volume in 1 second (FEV1) to predicted value (FEV1%pred), ratio of FEV1 to forced vital capacity (FEV1/FVC), inspiratory capacity to total lung capacity (IC/TLC) and residual volume to total lung capacity (RV/TLC), arterial blood gas parameters, including PH, arterial partial pressure of oxygen (PaO2) and arterial partial pressure of carbon dioxide (PaCO2), total serum immunoglobulin E (IgE), induced sputum eosinophil (EOS), plasma surfactant protein A (SP-A), plasma soluble receptor for advanced glycation end products (sRAGE), sputum myeloperoxidase (MPO), sputum neutrophil gelatinase-associated lipocalin (NGAL) and Asthma Control Test (ACT) scores, and COPD Assessment Test (CAT) scores. Compared with pre-treatment parameters, the FeNO levels, RV/TLC, PaCO2, total serum IgE, induced sputum EOS, plasma SP-A, sputum MPO, sputum NGAL, and CAT scores were significantly decreased after 6 months of ICS treatment, while FEV1%pred, FEV1/FVC, IC/TLC, PH, PaO2, plasma sRAGE, and ACT scores were significantly increased in ACOS patients with different disease severity after 6 months of ICS treatment. This finding suggests that the FeNO level may accurately predict the efficacy of ICS in the treatment of ACOS patients.


Subject(s)
Adrenal Cortex Hormones/therapeutic use , Asthma/drug therapy , Nitric Oxide/analysis , Pulmonary Disease, Chronic Obstructive/drug therapy , Administration, Inhalation , Adult , Aged , Asthma/complications , Asthma/pathology , Biomarkers/blood , Biomarkers/metabolism , Blood Gas Analysis , Case-Control Studies , Female , Forced Expiratory Volume , Humans , Immunoglobulin E/blood , Lipocalin-2/metabolism , Male , Middle Aged , Peroxidase/metabolism , Pulmonary Disease, Chronic Obstructive/complications , Pulmonary Disease, Chronic Obstructive/pathology , Pulmonary Surfactant-Associated Protein A/blood , Receptor for Advanced Glycation End Products/blood , Respiratory Function Tests , Severity of Illness Index , Sputum/enzymology , Sputum/metabolism
6.
J Infect Dev Ctries ; 10(5): 533-6, 2016 May 31.
Article in English | MEDLINE | ID: mdl-27249531

ABSTRACT

Herein we describe a rare fatal case of a novel bunyavirus-associated hemophagocytic lymphohistiocytosis (HLH) in a 62-year-old female patient. The novel bunyavirus infects patients with or without HLH who have similar clinical features such as fever, thrombocytopenia, and leukocytopenia. Therefore, the diagnosis of HLH can be easily missed. When HLH occurs, the disease worsens and the fatality rate rises. Our finding highlights the importance of bone marrow biopsy performed as soon as possible for patients suspected of having a novel bunyavirus infection and showing marked cytopenia in three cell lines.


Subject(s)
Bunyaviridae Infections/diagnosis , Bunyaviridae Infections/pathology , Lymphohistiocytosis, Hemophagocytic/diagnosis , Lymphohistiocytosis, Hemophagocytic/etiology , Orthobunyavirus/isolation & purification , Biopsy , Bone Marrow/pathology , Bunyaviridae Infections/virology , Fatal Outcome , Female , Humans , Lymphohistiocytosis, Hemophagocytic/pathology , Middle Aged
7.
Zhonghua Yu Fang Yi Xue Za Zhi ; 46(10): 912-5, 2012 Oct.
Article in Chinese | MEDLINE | ID: mdl-23363866

ABSTRACT

OBJECTIVE: To investigate the possible association between the SNP in the 5' untranslated region (5' UTR) of the human beta defensin 1 (DEFB1) gene and the susceptibility to pulmonary tuberculosis (PTB) in Chinese Han population. METHODS: In this case-control study, venous blood was collected from 102 patients with PTB and 148 healthful persons. Genomic DNA was extracted using whole blood DNA extraction kit. The -52A/G, -44C/G and -20A/G SNP were genotyped by PCR-directed sequencing. The genotypes and allele frequency were analyzed using the χ(2) test. The linkage disequilibrium and haplotype were analyzed by SHEsis software. RESULTS: A total of 102 patients with PTB (69 males and 33 females, (53.42 ± 20.22) years old) and 148 healthy control cases (95 males and 53 females, (50.67 ± 14.53) years old) were enrolled, with no difference in gender and age (all P values > 0.05). DEFB1 -44 CC genotype was significantly more frequently found in PTB patients than in control group (81.4% (83/102) vs 66.9% (99/148), χ(2) = 5.114, P < 0.05, OR = 2.096, 95%CI: 1.095 - 4.011), so was -44C allele (89.2% (182/204) vs 80.4% (238/296), χ(2) = 6.975, P < 0.05, OR = 1.576, 95%CI: 1.086 - 2.286). No difference in -52 A/G and -20 A/G SNP was observed between the two groups. The proportion of the GGG (-52/-44/-20) haplotype was lower in PTB patients than in the control group (0.030 vs 0.081, χ(2) = 5.629, P < 0.05, OR = 0.348, 95%CI: 0.140 - 0.863). No linkage disequilibrium was found among the SNP of the three sites (D' values were 0.132, 0.064, 0.088; r(2) values were 0.003, 0.002, 0.003; all P values > 0.05). CONCLUSION: These results suggest that the SNP of DEFB1 5' UTR is associated with susceptibility to PTB in Chinese Han population. -44 C→G SNP and the related haplotype (GGG) might play a protective role in the pathogenesis of PTB.


Subject(s)
Genetic Predisposition to Disease , Polymorphism, Single Nucleotide , Tuberculosis, Pulmonary/genetics , beta-Defensins/genetics , Adult , Aged , Case-Control Studies , Female , Gene Frequency , Genotype , Haplotypes , Humans , Male , Middle Aged
9.
Sheng Li Xue Bao ; 59(2): 210-4, 2007 Apr 25.
Article in Chinese | MEDLINE | ID: mdl-17437045

ABSTRACT

The purpose of the present study was to explore the expression changes of intermedin/adrenomedullin 2 (IMD/ADM2), a novel small molecular bioactive peptide, and its receptors, calcitonin receptor-like receptor (CRLR) and receptor activity modifying proteins (RAMP1, RAMP2, RAMP3) in the right ventricle of rats with chronic hypoxia-induced pulmonary hypertension. Twenty male Sprague-Dawley rats were randomly divided into 4-week hypoxia group and normal control group (each n=10). The rats in hypoxia group were placed in an isobaric hypoxic chamber, in which O(2) content was maintained at 9%-11% by delivering N(2), and CO(2) content was maintained at <3% for 4 weeks (8 h/d, 6 d/week). The rats in the control group were housed in room air. The protein levels of IMD/ADM2 and adrenomedullin (ADM) in blood plasma and right ventricular tissue were measured by radioimmunoassay. The mRNA expressions of IMD/ADM2, ADM and their receptors CRLR, RAMP1, RAMP2, RAMP3 in right ventricular tissue were determined by reverse transcription-polymerase chain reaction (RT-PCR). The results showed that the ratio of right ventricle weight to left ventricle plus septum weight [RV/(LV+S)] and mean pulmonary arterial pressure (mPAP) were higher in hypoxia group than those in the control group (all P<0.01), suggesting that the rat model of pulmonary hypertension was successfully established. However, the mean carotid arterial pressure (mCAP) between the two groups had no significant difference. Compared with that in the control group, ADM contents in plasma and right ventricular tissue in hypoxia group increased by 1.26 and 1.68 folds (all P<0.01), respectively. Likewise, IMD/ADM2 contents in blood plasma and right ventricular tissue in hypoxia group increased by 0.90 and 1.19 folds (P<0.01), respectively, compared with that in the control group. The data of RT-PCR showed that mRNA levels of ADM, IMD/ADM2 and RAMP2 in hypoxia group increased by 155.1% (P<0.01), 80.9% (P<0.01) and 52.9% (P<0.05), respectively, compared with those in the control group. There were no significant differences in mRNA expressions of CRLR, RAMP1 and RAMP3 between the two groups (all P>0.05). Taken together, the results show that the level of IMD/ADM2 increases in the rats with chronic hypoxia-induced pulmonary hypertension.


Subject(s)
Adrenomedullin/metabolism , Calcitonin Receptor-Like Protein/metabolism , Heart Ventricles/metabolism , Hypertension, Pulmonary/metabolism , Neuropeptides/metabolism , Receptor Activity-Modifying Proteins/metabolism , Animals , Hypertension, Pulmonary/etiology , Hypertension, Pulmonary/physiopathology , Hypoxia/complications , Male , Rats , Rats, Sprague-Dawley
10.
Zhongguo Ying Yong Sheng Li Xue Za Zhi ; 23(4): 467-71, 2007 Nov.
Article in Chinese | MEDLINE | ID: mdl-21180135

ABSTRACT

AIM: To investigate the changes and probable roles of adrenomedullin2/intermedin (AIDM2/IMD), a novel micromolecular bioactive peptide, in the lungs of rats with chronic hypoxic pulmonary hypertension. METHODS: Twenty male SD rats were randomly divided into normal control group (NC) and normobaric hypoxia group (4H). The protein levels of ADM and ADM2/IMD) in the plasma and lung were measured by radioimmunoassay and immunohistochemistry. The mRNA expressions of ADM, ADM2/IMD and their receptors C (RLR, RAMP1, RAMP2 and RAMP3 in the lung tissue were determined by reverse transcription-polymerase chain reaction (RT-PCR). RESULTS: (1) The rat model of chronic pulmonary hypertension was confirmed by the increased mean pulmonary arterial pressure (mPAP) and weight ratio of right ventricle to left ventricle plus septum [RV/(LV + S)] in 4H group compared to NC group. (2) The concentrations of ADM in the plasma and lung homogenate of 4H group were 2.3 and 3.2 folds of NC group, respectively (all P < 0.01). The levels of ADM2/IMD were higher 89.6% and 45.0% in the plasma and lung homogenate of 4H group than those of NC group (respectively, P < 0.01, P < 0.05). (3) The mRNA expressions of ADM2/IMD and ADM in the lung of 4H group were up-regulated (respectively, P < 0.01, P < 0.05 vs. NC group). The expressions of CRLR and RAMP1 mRNAs were down-regulated (all P < 0.01 vs. NC group), while the levels of RAMP2 and RAMP3 mRNAs were no significant difference between the two groups. (4) The strong ADM2/IMD immunostaining was detected in the endothelial and adventitial cells of the rat pulmonary arteriole. CONCLUSION: ADM2/IMD, like its paralog ADM, might be closely related to the chronic hypoxic pulmonary hypertension in rats. The disorders of the gene expression and/or the synthesis and metabolism of ADM2/IMD and its receptor CRLR/RAMP1 possibly take part in the pathogenesis of chronic hypoxic pulmonary hypertension in rats.


Subject(s)
Adrenomedullin/metabolism , Hypertension, Pulmonary/metabolism , Lung/metabolism , Neuropeptides/metabolism , Animals , Hypertension, Pulmonary/etiology , Hypoxia/complications , Hypoxia/metabolism , Male , Rats , Rats, Sprague-Dawley
11.
Zhongguo Ying Yong Sheng Li Xue Za Zhi ; 22(4): 488-91, 2006 Nov.
Article in Chinese | MEDLINE | ID: mdl-21155283

ABSTRACT

AIM: To investigate the expression of hypoxia-inducible factor-1 alpha (HIF-1alpha) in rats with chronic pulmonary hypertension induced by hypoxia and hypercapnia and its relationship with nitric oxide(NO). METHODS: Fourty male Sprague-Dawley rats were randomly divided into four groups, normal control group (NC), hypoxia-hypercapnia group (HH), hypoxia - hypercapnia + L-arginine liposome group(HP) and hypoxia-hypercapnia+ N-nitro-L-arginine methylester group (HM). Colorimetric analysis, immunohistochemistry and in situ hybridization were used for detection of NO, HIF-1alpha and constitutive nitric oxide synthase (ecNOS). RESULTS: (1) The mean pulmonary arterial pressure (mPAP) and the weight ratio of right ventricular to left ventricle plus septum (RV/(LV + S)) of HH group were higher than those of NC group (P < 0.05), HP group much lower than HH group (P < 0.01), mPAP of HM higher than HH group ( P < 0.05). 2)0 Contents of NO in plasma and pulmonary tissue homogenates of HH group were much lower than those of NC group (P < 0.01), HP group higher than HH group (P < 0.01). There were no difference between HM group and HH group. (Expression of HIF-1alpha and HIF-1alpha mRNA in pulmonary arterioles of HH group were significantly higher than those of NC group( P < 0.01), HP group lower than HH group (P < 0.01) ,HM group higher than HH group (P < 0.01); Whereas expression of ecNOS and ecNOS mRNA in pulmonary arterioles of HH were lower than those of NC group( P < 0.05, IP group higher than HH group (P < 0.01), HM group lower than HH group (P < 0.05). CONCLUSION: HIF-1alpha is involved in the pathogenesis of chronic pulmonary hypertension induced by hypoxia and hypercapnia. The protective function of NO in the pathogenesis might be partly depended on its effects on the expression/activity of HIF-1alpha in lung.


Subject(s)
Hypertension, Pulmonary/metabolism , Hypoxia-Inducible Factor 1, alpha Subunit/metabolism , Hypoxia , Nitric Oxide/metabolism , Animals , Hypertension, Pulmonary/etiology , Male , Nitric Oxide Synthase/metabolism , RNA, Messenger/genetics , Rats , Rats, Sprague-Dawley
12.
Article in Chinese | MEDLINE | ID: mdl-21186587

ABSTRACT

AIM: To observe the expression of Urotensin II (U II) and its receptor (UT) on right ventricle in rats with chronic pulmonary hypertension induced by hypoxia and hypercapnia. METHODS: Twenty male SD rats were randomly divided into normal control group (NC) and hypoxia-hypercapnia 4-week group(HH). Mean pulmonary arterial pressure(MPAP) and the weight ratio of right ventricle (RV) to left ventricle plus septum (LV+ S) were calculated separately. U II in plasma was measured using radioimmunoassay. The expression of U II was observed in right ventricle myocytes and right ventricle arteries by immunohistochemistry. The expression of U II mRNA and UT mRNA were observed in right ventricle myocytes and right ventricle arteries by in situ hybridization. RESULTS: (1) The MPAP and RV/LV + S of HH group were higher respectively than those of NC group (P < 0.01, respectively). (2) The plasma U II content of HH group did not increased obviously than that of NC group. (3) The expression score of U II, U II mRNA, UT mRNA by right ventricle myocytes in HH group were higher significantly than those of NC group (P < 0.01 respectively). (4) The average value of integral light density (LD) of U II, U II mRNA, UT mRNA by right cardial arteries in HH group were higher significantly than those of NC group (P < 0.01, respectively). CONCLUSION: The expression of U II in right ventricle arteries and right ventricle myocytes increase significantly during the formation of pulmonary hypertension and right ventricle hypertrophy in rats chronically exposed to hypoxia-hypercapnia. These changes indicate that U II might be involved in right ventricle remodeling, which promotes proliferation of cardiac muscle cells.


Subject(s)
Heart Ventricles/metabolism , Hypertension, Pulmonary/metabolism , Receptors, G-Protein-Coupled/metabolism , Urotensins/metabolism , Animals , Hypoxia/metabolism , Male , Rats , Rats, Sprague-Dawley
13.
Zhongguo Ying Yong Sheng Li Xue Za Zhi ; 21(4): 377-81, 2005 Nov.
Article in Chinese | MEDLINE | ID: mdl-21180151

ABSTRACT

AIM: To investigate the dynamic changes and functions of urotensin II (U lI) receptor (UT) in pulmonary arteries of rats chronically exposed to hypoxia-hypercapnia. METHODS: In rats with hypoxia-hypercapnia at 1, 2 and 4 weeks U II receptor binding of pulmonary arteries sarcolemma was determined by radioligand assay. U II mRNA and UTmRNA in various grades of pulmonary arterioles were measured by in situ hybridization. RESULTS: (1) Mean pulmonary pressure (mPAP) and weight ratio of right ventricle to left ventricle and septum (RV/LV + S) of 1-week group were higher than those of normal control (NC) group by 26.2% and 21.6% (P < 0.01), respectively, and 2-week group higher than 1-week group by 22.5% and 14.1% (respectively, P < 0.01). However, no significant changes were found between 4-week and 2-week group. (2) U Il receptor (Bmax) of 1-week group was higher than NC group by 38.8%, 2-week group higher than 1-week group by 23.2%, and 4-week group increased 7.3% compared with 2-week group (respectively, P < 0.01). The UT changes were time-dependent, while the affinity to U II (Kd) was no different among each group. (3) UII mRNA in each grade of pulmonary arterioles of 2-week group and 4-week group were higher than NC group (respectively, P < 0.01), and those of 2-week group were higher than 1-week group by 5.9% (P > 0.05), 16.4% and 9.1% (respectively, P < 0.01), while no differences existed between 2-week group and 4-week group. (4) UT mRNA in each grade of pulmonary arterioles of all hypoxia-hypercapnia groups was higher than NC group (respectively, P < 0.01), and those of two abaxial grade vessels in 1-week group were the highest. No differences existed between 2-week group and 4-week group. (5) The pulmonary vessels remodeling were time-dependently aggravated by hypoxia-hypercapnia. CONCLUSION: The dynamic changes of UT in pulmonary arterioles might have important contribution to the development of pulmonary hypertension and pulmonary arteriole remodeling induced by chronic hypoxia-hypercapnia in rats.


Subject(s)
Arterioles/metabolism , Hypercapnia/metabolism , Hypertension, Pulmonary/metabolism , Hypoxia/metabolism , Pulmonary Artery/metabolism , Receptors, G-Protein-Coupled/metabolism , Animals , Arterioles/physiopathology , Hypertension, Pulmonary/physiopathology , Male , Pulmonary Artery/physiopathology , Rats , Rats, Sprague-Dawley
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