RESUMO
BACKGROUND: Vascular calcification has been found to be associated with increased risk of cardiovascular (CV) morbidity and mortality. Various bone-associated proteins have been suggested to be related with this process. In this study, we aimed to evaluate whether serum levels of bone morphogenic protein-4 (BMP-4) and matrix Gla protein (MGP) differed in patients who were found to have normal epicardial coronary arteries or a culprit lesion in the coronary angiography leading to acute coronary syndrome (ACS). METHODS: Patients admitted to emergency department with the diagnosis of ACS who underwent primary percutaneous coronary intervention (PCI) between October 2015 and April 2016 were consecutively recruited as the patient group. Age and gender-matched subjects who underwent coronary angiography following non-invasive ischemia assessment made the control group. RESULTS: A total of 90 subjects (63.00±14.02 years, 70% male) were included in this study. MGP (<0.001) and BMP-4 (<0.001) levels were significantly elevated when compared to subjects with normal coronary arteries. Fasting blood glucose (P=.024), HDL-cholesterol (P=.002), C-reactive protein (CRP) (P=.001) levels, and left ventricular ejection fraction (LVEF) (P=.021) were significantly correlated with serum MGP levels. HDL-cholesterol (P=.001) and CRP (P=.030) levels were also significantly correlated with serum BMP-4 levels. In the model including HDL-cholesterol, CRP, MGP, and BMP-4 levels, only MGP (odds ratio[OR]: 1.018, P=.019) and BMP-4 (OR: 1.313, P=.023) were found to be independently associated with ACS. CONCLUSION: This study shows that serum BMP-4 and MGP are independently associated with ACS occurrence when adjusted for other CV risk factors. These biomarkers may have a diagnostic potential in ACS patients.
Assuntos
Síndrome Coronariana Aguda/sangue , Síndrome Coronariana Aguda/epidemiologia , Biomarcadores/sangue , Proteína Morfogenética Óssea 4/sangue , Proteínas de Ligação ao Cálcio/sangue , Proteínas da Matriz Extracelular/sangue , Idoso , Aterosclerose , Estudos de Coortes , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Proteína de Matriz GlaRESUMO
BACKGROUND: Central nervous system (CNS) infections require prompt diagnosis, as the clinical condition progresses rapidly and may lead to severe permanent sequelae or death. The causative agents include viruses, bacteria, fungi, and parasites. In this study, samples with the diagnosis of CNS infection based on cerebrospinal fluid (CSF) sent to us from other hospitals/labs, were studied by multiplex real-time Polymerase Chain Reaction (PCR) method. The purpose of this study is to demonstrate, retrospectively, the most common bacteria and viruses causing meningitis and seasonal distribution of these agents using the multiplex real-time PCR method in CSF samples. METHODS: This study retrospectively evaluated the results of 470 CSF specimens that had been sent to the Molecular Unit of our hospital with a pre-diagnosis of CNS infection and had been tested with the PCR method between January 2014 and December 2015. Specimens were tested using multiplex real-time PCR assay for Adenovirus (AdV), Cytomegalovirus (CMV), Enteroviruses (EV) (Polioviruses, Coxackieviruses, Echoviruses, and other enteroviruses), Epstein- Barr virus (EBV), Herpes simplex virus 1 and 2, Human Herpes virus 6 and 7, Varicella-zoster virus (VZV), Human Parechoviruses and Parvovirus B19, Hemophilus influenzae, Streptococcus pneumoniae or Neisseria meningitidis. (FTD NEURO9 and FTD Bacterial meningitis, multiplex real-time PCR Kit). RESULTS: A bacterial or viral agent was identified in 98 (21%) of the 470 CSF samples. Of the patients, 85% were children and 15% were adults. Of the 98 positive samples, 22 (22.5%) patients were 15 years or older, and the remaining 76 (77.5%) were younger than 15 years. While Enterovirus (25%) was the most frequently identified agent, Adenovirus ranked second (22%) and Streptococcus pneumoniae ranked third (15%) in total. Positivity was highest in the 0 - 5-year age range. Bacteria were detected with the PCR method in 22 patients: S. pneumonia in 14, and N. meningitidis in 8. In cultures, S. pneumonia grew only in 7 and N. meningitidis in one. EV and AdV were seen in the summer months. The two coexisted in 3 (3%) patients. CONCLUSIONS: Early diagnosis and treatment of meningitis are very important for reducing its mortality and morbidity. In patients with suspected meningitis, early detection of the responsible agents may be possible with molecular methods, such as PCR. Significant economic benefits may be obtained by preventing unnecessary antibiotic use and hospitalizations through the early detection of the microbial agents.
Assuntos
Meningite Viral , Reação em Cadeia da Polimerase em Tempo Real , Humanos , Reação em Cadeia da Polimerase , Estudos Retrospectivos , VirosesRESUMO
The aim of this study was to evaluate the response of tuberculin skin test (TST) and the parameters that affect the response in patients with chronic renal failure (CRF) on different treatment regimens. The study population consisted of 150 patients (78 females, mean age 48.1 + or - 16.7 years, the mean disease duration 6.6 + or - 6.1 years). Of these patients, 50 were on haemodialysis (HD), 50 were renal transplant patients, 26 were on peritoneal dialysis (PD) and 24 were treated medically. TST was performed to all patients, an induration with a diameter of 10 mm or more was accepted as positive response in HD, PD, medical treatment groups, whereas 5 mm or more was considered as positive in transplant group. TST was positive in 52% of the study population (56% in HD group, 54% in PD group, 44% in transplant group, 58% in medical treatment group, p> 0.05). There was a positive correlation between TST and age in patients older than 60 of transplant and medical treatment groups (p= 0.008). In HD patients with negative TST, the number of female patients was higher (p= 0.02). In transplant patients with positive TST, duration of HD was shorter (p= 0.01), the blood urea level was lower (p= 0.04), hemoglobin level was higher (p= 0.04). The ratio of negative TST was higher (p< 0.05), TST reactivity was smaller (p= 0.01) in only transplant patients with no BCG scar. The number of BCG scar was correlated positively with TST (p= 0.04). In the medical treatment group, patients with positive TST response were older (p= 0.02) and in PD group the tuberculin reactivity was not affected by any of the patient-related parameters. It must be considered that the response to TST is low in young patients with uncontrolled CRF and under immunosuppressive therapy.
Assuntos
Falência Renal Crônica/complicações , Falência Renal Crônica/terapia , Teste Tuberculínico , Tuberculose/diagnóstico , Adulto , Fatores Etários , Nitrogênio da Ureia Sanguínea , Feminino , Humanos , Hospedeiro Imunocomprometido , Falência Renal Crônica/imunologia , Transplante de Rim , Masculino , Pessoa de Meia-Idade , Diálise Peritoneal , Diálise Renal , Fatores de Risco , Fatores Sexuais , Resultado do Tratamento , Tuberculose/epidemiologia , Turquia/epidemiologiaRESUMO
BACKGROUND AND AIM: Excess visceral fat accumulation results in altered release of adipokines. The aim of this study was to examine the relationship between new adipokines (omentin-1 and vaspin), insulin resistance, and serum inflammatory markers in obese subjects with metabolic syndrome (MS). PATIENTS AND METHODS: The study included a total of 121 obese children (79 females and 42 males, aged 12-17 years old). The obese subjects were divided into two groups based on the presence or absence of MS criteria (MS group and non-MS group). Serum omentin-1, vaspin, and high-sensitivity C-reactive protein (CRP) were measured in addition to the other glucose metabolism parameters. RESULTS: MS was diagnosed in 45 obese children and 76 children did not meet the MS criteria. Serum omentin-1 (289.5 ± 51.9 ng/mL vs. 268.2 ± 60 ng/mL, P = 0.03) levels were significantly lower in the MS group compared to the non-MS group. Serum vaspin levels (1058.3 ± 118 pg/mL vs. 1178.6 ± 158 pg/mL, P = 0.02) were higher in the MS group than the non-MS group. CRP levels correlated well with both the adipokines (r = -0.236, P = 0.04 for omentin-1 and r = 0.296, P = 0.008 for vaspin), although these adipokines did not show statistically significant correlations with fasting glucose-insulin levels, homeostasis model assessment of insulin resistance, and 2 hr postload glucose level. CONCLUSIONS: Higher vaspin and lower omentin-1 levels were determined in obese MS children compared to non-MS children and these adipokines were significantly correlated with high CRP values. These data support the view that adipokines in MS children contribute to increased inflammation markers before abnormal glucose metabolism.
Assuntos
Citocinas/sangue , Lectinas/sangue , Síndrome Metabólica/sangue , Obesidade Infantil/sangue , Serpinas/sangue , Adolescente , Biomarcadores/sangue , Proteína C-Reativa/metabolismo , Estudos de Casos e Controles , Criança , Feminino , Proteínas Ligadas por GPI/sangue , Humanos , Masculino , Síndrome Metabólica/complicações , Obesidade Infantil/complicaçõesRESUMO
AIMS: In this study, we aimed to investigate whether serum S100A8, S100A9 and S100A12 levels were markers of acute coronary syndrome (ACS). MATERIALS & METHODS: Patients who underwent coronary angiography and/or percutaneous coronary interventions between June 2015-October 2015 were consecutively recruited in this study and categorized three groups each containing 30 patients (normal coronary arteries, stable coronary artery disease, and acute coronary syndrome). Baseline characteristics, including co- morbidities and medications, were recorded and serum S100A8, S100A9, S100A12, and C- reactive protein levels were measured besides routine laboratory tests. RESULTS: A total of 90 patients (63.00 [56.00-73.00] years, 62.89% male) have been included. None of the groups differed from each other regarding baseline characteristics (p > 0.05). S100A9 levels were elevated in ACS when compared with the normal coronary arteries (p = 0.033) and S100A12 levels were found to be elevated in ACS when compared with both patients with normal coronary arteries and stable coronary artery disease (p = 0.001). S100A12 was identified as an independent associate of ACS (p = 0.002). CONCLUSION: These results suggest that S100A12 may serve as a marker of coronary plaque instability, and may have a therapeutic implication in ACS treatment.
Assuntos
Síndrome Coronariana Aguda/diagnóstico , Calgranulina B/sangue , Proteína S100A12/sangue , Síndrome Coronariana Aguda/metabolismo , Idoso , Biomarcadores/sangue , Proteína C-Reativa , Vasos Coronários/metabolismo , Creatinina/sangue , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Razão de Chances , Regulação para CimaRESUMO
Cisplatin-etoposide (CE) and mitomycin, ifosfamide and cisplatin (MIC) combinations are active conventional regimens in non-small cell lung cancer (NSCLC). In this retrospective study, we compared response rates, survival, duration of response, time-to-progression and toxicity of CE with MIC regimens in treatment of previously untreated patients with stage IIIB and IV NSCLC. We first determined the patients with NSCLC who had stage IIIB or IV and received CE or MIC between January 1997 and December 2002 in our clinic. Out of the eligible patients, 45 received MIC, 167 received CE. In addition 45 MIC patients, we included 46 of the 167 CE patients in the study by selecting one patient of every three patient randomly. In CE protocol, cisplatin 80 mg/m(2) on day 1 and etoposide 100 mg/m(2) on days 1, 2, 3 (every three weeks); in MIC protocol, mitomycin 6 mg/m(2), ifosfamide 3 g/m(2), cisplatin 50 mg/m(2) on day 1 (every three weeks) were performed. For statistical analysis, chi-square, t-test, Kaplan-Meier survival analysis, Cox regression analysis and logistic regression analysis were used by SPSS 11.5 computer program. The overall response rate was 33.3% in the MIC arm and 34.8% in the CE arm. A respective median survival was 28 weeks for the MIC arm and 35 weeks for the CE arm. Median duration of response and time to progression in each groups were 23 and 14 weeks in MIC arm and 32 and 22 weeks respectively. There was no statistical difference for response rates, duration of survival and response, time top progression and toxicity between the two arms. We consider that the combinations of MIC and CE have similar activity and they can be used confidently in advanced NSCLC.
Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Neoplasias Pulmonares/tratamento farmacológico , Carcinoma Pulmonar de Células não Pequenas/mortalidade , Carcinoma Pulmonar de Células não Pequenas/patologia , Cisplatino/administração & dosagem , Etoposídeo/administração & dosagem , Feminino , Humanos , Ifosfamida/administração & dosagem , Neoplasias Pulmonares/mortalidade , Neoplasias Pulmonares/patologia , Masculino , Pessoa de Meia-Idade , Mitomicina/administração & dosagem , Metástase Neoplásica , Estudos Retrospectivos , Análise de Sobrevida , Resultado do Tratamento , TurquiaRESUMO
As anergy is common in patients with chronic renal failure (CRF), the use of tuberculin skin test (TST) is controversial. Therefore, determination of the factors that affect the TST reactivity would increase the diagnostic value of the test. The aim of the present study was to investigate the factors affecting TST reactivity and evaluate the relationship between T-lymphocyte subsets and TST reactivity. We thus examined 44 patients (mean age 46.6 +/- 15.6 years, 25 males, duration of CRF 5.6 +/- 5.2 years), performed TST (an induration with a diameter of 5 mm or more was considered as positive) and measured Tlymphocyte subsets and biochemical parameters. Twenty-three patients were on hemodialysis, six were on peritoneal dialysis, seven were transplant recipients, and eight were on medical treatment. Eleven patients (25%) had immunosuppressive treatment. Eleven patients (25%) had two, 29 patients (66%) had one, and four patients (9%) had no BCG scars. Five patients (11%) had low body mass index (BMI). T-lymphocyte subsets were as follows: CD4= 40.7 +/- 7.6%, CD8= 32 +/- 8.9%, CD4/CD8= 1.7 +/- 2.5%, CD3= 71.4 +/- 9.4%, CD19= 6.3 +/- 5.1%, NK= 9.7 +/- 5.9. Twenty-two patients had positive TST reactivity. No relation was found between TST reactivity and age, gender, co-morbidity, BCG vaccination, BMI, immunosuppressive therapy, duration and treatment of CRF. Similarly, TST reactivity was not related to the biochemical parameters and Tlymphocyte subsets. These data provide that tuberculin reactivity does not seem to be associated with T-lymphocyte dysfunction and clinical features in patients with chronic renal failure.
Assuntos
Falência Renal Crônica , Subpopulações de Linfócitos T/imunologia , Teste Tuberculínico , Tuberculose Pulmonar/diagnóstico , Tuberculose Pulmonar/imunologia , Feminino , Humanos , Hospedeiro Imunocomprometido , Falência Renal Crônica/complicações , Falência Renal Crônica/terapia , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Diálise Renal , Tuberculose Pulmonar/complicaçõesRESUMO
BACKGROUND: Metabolic syndrome (MetS) is a chronic and multifactorial syndrome characterized by a low-grade chronic inflammation, and a major risk factor for type 2 diabetes mellitus (T2DM) and cardiovascular disease (CVD). In our study, we aimed to investigate the serum levels of high sensitive C-reactive protein (hs-CRP), haptoglobin (Hp), α2-macroglobulin (α2-MG), platelet factor-4 (PF-4), fetuin-A, serum amyloid P (SAP) and α1-acid glycoprotein (AGP) in an adolescent population with MetS. METHODS: This study was performed in 43 (18 males, 25 females) MetS adolescents between the ages of 13 and 17 years (14.70±1.15) and 43 lean controls were matched for age and sex. The serum levels of Hp, α2-MG, PF-4, fetuin-A, SAP and AGP were measured by using a multi-ELISA technique. RESULTS: Serum Hp, fetuin-A (p<0.01) and PF-4, hs-CRP, SAP, AGP (p<0.001) values of the MetS subjects were significantly higher than those of the controls. No difference was found in serum α2-MG levels between the MetS and control groups (p=0.184). CONCLUSIONS: This finding suggests the possibility of using these markers in diagnosis of MetS in adolescents to prevent future complications.
Assuntos
Proteína C-Reativa/análise , Haptoglobinas/análise , Síndrome Metabólica/sangue , Orosomucoide/análise , Fator Plaquetário 4/sangue , Componente Amiloide P Sérico/análise , alfa-2-Glicoproteína-HS/análise , Adolescente , Biomarcadores/sangue , Ensaio de Imunoadsorção Enzimática , Feminino , Hospitais de Ensino , Humanos , Resistência à Insulina , Masculino , Síndrome Metabólica/epidemiologia , Síndrome Metabólica/imunologia , Síndrome Metabólica/metabolismo , Ambulatório Hospitalar , Curva ROC , Risco , Turquia/epidemiologia , Regulação para CimaRESUMO
BACKGROUND: Chronic obstructive pulmonary disease (COPD) results from an abnormal inflammatory response of the lungs to noxious particles or gases. Serum soluble urokinase-type plasminogen activator receptor (suPAR) is a glycoprotein secreted during infections and inflammation. The main goal of this study was to evaluate the serum suPAR level in stable COPD patients compared with a control group. METHODS: Forty-six stable COPD patients and 41 control subjects were included in the study. Blood samples were collected from 46 stable COPD patients (40 men, 6 women; mean [SD] age, 55.92 [7.91] years; the forced expiratory volume in 1 second, 45.32% [19.1%] of predicted). Forty-one healthy subjects were selected as control subjects and were matched to COPD patients with respect to age and body mass index. Serum suPAR and plasma fibrinogen levels were measured in stable COPD patients and control subjects. RESULTS: Serum suPAR levels of the COPD patients were significantly higher than those of the control subjects (4.94 [2.79] and 2.40 [2.01] ng/mL, respectively; P < 0.001). Plasma fibrinogen levels of the COPD patients were significantly higher than those of the control subjects (406.77 [172.6] and 336.53 [96.1] g/L, respectively; P < 0.05). CONCLUSIONS: Our study indicated that serum suPAR may play an important role in the inflammatory process of COPD, and this increase may be particularly large for patients in Global Initiative for Chronic Obstructive Lung Disease stages III and IV. Serum suPAR and plasma fibrinogen level measurements may be useful for the evaluation of stable COPD.
Assuntos
Doença Pulmonar Obstrutiva Crônica/sangue , Receptores de Ativador de Plasminogênio Tipo Uroquinase/sangue , Biomarcadores/sangue , Estudos de Casos e Controles , Demografia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , SolubilidadeRESUMO
BACKGROUND: Mycophenolate mofetil (MMF) and tacrolimus (TAC) are more potent than conventional immunosuppressive drugs, i.e. azathioprine, cyclosporin and prednisolone, and may be associated with an increase in the incidence of infections in the post-transplantation (post-tx) period. The aim of this study was to determine if the use of either or both of MMF and TAC for immunosuppression in renal transplant recipients increases the prevalence or modifies the clinical presentation of tuberculosis (TB), when compared with conventional therapy. METHODS: The medical records of 443 adult patients who received a kidney transplant between 1994 and 2002 were reviewed retrospectively. Comparisons were made between patients who had conventional immunosuppressive treatments (cyclosporin, azathioprine and prednisolone) or an alternative regimen (including MMF, TAC or both). RESULTS: We found 20 patients (4.5%) to have post-tx TB. There were 13 cases of TB (age 38.9+/-10.6 years) among 328 patients who received conventional immunosuppressants (group I) (4.0%) and seven cases (age 24.2+/-7.4 years) among 115 (6.1%) who received an alternative immunosuppressive regimen (group II) (P>0.05). The patients in group II were younger than the patients in group I (P = 0.002). A significantly higher number of patients in group II developed TB within the first 6 months post-tx (P = 0.042). However, there was no significant difference between the two groups regarding clinical and radiographic presentations or outcomes. CONCLUSIONS: Immunosuppression with TAC or MMF is associated with the development of TB earlier in the post-tx period and in younger patients.
Assuntos
Terapia de Imunossupressão/efeitos adversos , Imunossupressores/efeitos adversos , Transplante de Rim , Ácido Micofenólico/análogos & derivados , Tacrolimo/efeitos adversos , Tuberculose/etiologia , Adulto , Azatioprina/efeitos adversos , Ciclosporina/efeitos adversos , Feminino , Humanos , Masculino , Ácido Micofenólico/efeitos adversos , Prednisolona/efeitos adversos , Estudos RetrospectivosRESUMO
OBJECTIVE: Cisplatin-gemcitabine (PG) and cisplatin-etoposide (PE) combinations are active regimens for non-small cell lung cancer (NSCLC). The present study aimed to compare PG with PE in the treatment of patients with stage IIIB and IV NSCLC. METHODOLOGY: We conducted a prospective, multicentre trial. A total of 166 patients were enrolled into the study and received either gemcitabine (1,000 mg/m(2)) on days 1, 8 and 15 plus cisplatin (80 mg/m(2)) on day 2 every 4 weeks, or etoposide (100 mg/m(2)) on days 1, 2 and 3 plus cisplatin (80 mg/m(2)) on day 1 every 3 weeks. RESULTS: The overall response rate was superior in the PG group (54.8%vs 39.0%, P=0.045). There was no significant difference in survival between the two groups, with respective median and 1-year survival of 38 weeks and 33.3% for the PG group, and 34 weeks and 23.2% for the PE group. There was also no statistical difference for time to progression between the two groups. Neutropenia and thrombocytopenia were seen more frequently in the PG group (grade 3 neutropenia, 33.3%vs 15.9%, P=0.012; grade 3 thrombocytopenia, 27.4%vs 3.7%, P<0.001 and grade 4 thrombocytopenia, 10.7%vs 1.2%, P=0.018). CONCLUSION: PG is an active chemotherapy regimen and has a better response rate than PE in advanced NSCLC, although there was no difference in time to progression and overall survival. A higher incidence of haematological toxicity was seen with PG than with PE.
Assuntos
Antineoplásicos/administração & dosagem , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Cisplatino/administração & dosagem , Desoxicitidina/análogos & derivados , Etoposídeo/administração & dosagem , Neoplasias Pulmonares/tratamento farmacológico , Adulto , Idoso , Carcinoma Pulmonar de Células não Pequenas/mortalidade , Carcinoma Pulmonar de Células não Pequenas/patologia , Desoxicitidina/administração & dosagem , Quimioterapia Combinada , Feminino , Humanos , Neoplasias Pulmonares/mortalidade , Neoplasias Pulmonares/patologia , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Taxa de Sobrevida , Resultado do Tratamento , Turquia , GencitabinaRESUMO
OBJECTIVE: To assess smoking habit and awareness of smoking as a potential cause of disease among relatives of patients with serious smoking-related disorders. DESIGN AND SETTING: A survey using a face-to-face interview-assisted questionnaire at the Ege University Hospital between October 1998 and March 1999. SUBJECTS: We interviewed 242 relatives of patients with serious smoking-related disorders, of whom 56.6% were female and 43.4% male. The mean age was 41.2 +/- 13.2 years (15-75). One relative per patient completed the questionnaire and the chosen relative took care of the patient during his illness and accompanied him during hospital visits. MAIN OUTCOME MEASURES: We assessed the relationship between smoking habit and the perception of smoking as a potential cause of illness by the relatives. Statistical analysis was performed by chi(2) test. RESULTS: The prevalence of smoking among relatives was 37.6% [49.5% males (n = 105) and 28.5% females (n = 137), p = 0.0003] and an additional 20.2% were ex-smokers. Of the relatives, 86.4% knew that the diseases were directly related to smoking, and 37.8% of these people were smokers and 21.5% ex-smokers. Only 7.2% reported that they had quit smoking after being influenced by the diseases of the patients. The decision to quit was statistically unrelated to the awareness of smoking as the cause of disease. Of all the relatives, 69.2% had tried to quit at least once, 86.8% considered quitting, and 89.0% considered using professional help for smoking cessation. CONCLUSION: The findings show that even though this group of smokers is aware of the harmful effects of smoking they cannot successfully quit smoking; however, the majority reconsider quitting and receiving professional help.
Assuntos
Relações Interpessoais , Fumar/psicologia , Transtornos Relacionados ao Uso de Substâncias/psicologia , Adolescente , Adulto , Idoso , Feminino , Humanos , Entrevistas como Assunto , Masculino , Pessoa de Meia-Idade , Abandono do Hábito de FumarRESUMO
BACKGROUND: Secondary pulmonary hypertension (PH) and cor pulmonale are the major clinical cardiovascular complications affecting prognosis in patients with chronic obstructive pulmonary disease (COPD). It is also known that endothelin-1 (ET-1) is a potent vasoconstrictor peptide produced by the pulmonary vascular endothelium, and ET-1 may be implicated in the pathogenesis of PH. OBJECTIVES: The purpose of this study was to investigate the presence of ET-1 in patients with COPD and to assess the correlation of ET-1 levels in the plasma and bronchoalveolar lavage (BAL) fluid (BALF) in COPD patients with or without PH. METHODS: Twenty-two patients with COPD and 15 healthy controls were enrolled in the study. Peripheral venous blood samples were collected in all patients and controls. BAL was obtained in COPD patients, and ET-1 levels were measured by radioimmunoassay in all plasma and BALF samples. RESULTS: Plasma ET-1 levels were 2.46 +/- 0.55 and 1.70 +/- 0.42 pmol/dl in patients with COPD and controls, respectively (p < 0.0001). Sixteen of the 22 patients with COPD (73%) had PH established by echocardiography. The ET-1 level in these patients amounted to 2.59 +/- 0.50 pmol/dl, and it was 2.10 +/- 0.54 pmol/dl in 6 patients with COPD without PH. In COPD patients with and without PH, BALF ET-1 levels were 0.19 +/- 0.08 and 0.24 +/- 0.01 pmol/dl, respectively (p > 0.05). CONCLUSIONS: These results suggest that ET-1 is detectable in both the peripheral blood and BALF of COPD patients, but the levels do not statistically differ between patients with and without PH.