Tuberkuloz ve toraks最新文献

{"title":"Tuberculosis - The master of disguise: A case of disseminated tuberculosis masquerading as metastatic cancer.","authors":"Ezgi Aysu Şahin Mavi, Muhammed Çağrı Akdemir, Ali Eren Akin, Oğuz Abdullah Uyaroğlu, Deniz Köksal","doi":"10.5578/tt.202402915","DOIUrl":"10.5578/tt.202402915","url":null,"abstract":"<p><p>Tuberculosis (TB) is an airborne infectious disease caused by Mycobacterium tuberculosis (MTB). Although it typically affects the lungs (pulmonary TB), one-fifth of TB cases present as extrapulmonary TB. The diagnosis of extrapulmonary TB is often overlooked due to its atypical clinical and radiological manifestations. Differentiating TB from neoplastic conditions poses significant challenges. A 33-year-old female patient was admitted to the emergency clinic with shortness of breath, cough, and abdominal pain. Postero-anterior chest X-ray revealed massive pleural effusion leading to mediastinal shift. With a preliminary diagnosis of malignant pleural effusion, a pleural catheter was inserted, and the patient was referred for a positron emission tomography (PET/CT) to assess the primary site and the optimal location for a biopsy. The PET/CT revealed asymmetric soft tissue thickening on the left side of the nasopharynx, and increased fluorodeoxyglucose (FDG) uptake in the left cervical lymph nodes raised suspicion regarding primary nasopharyngeal cancer. Additionally, there was an increased FDG uptake observed in the mass lesion located in the right upper lobe, mediastinal lymph nodes, pleural surfaces in the left hemithorax, perihepatic areas, and peritoneum, indicating diffuse metastatic disease. Tuberculosis diagnosis was confirmed through biopsies demonstrating granulomatous inflammation in the lung and nasopharynx, along with culturing MTB from pleural effusion. Positron emission tomography played a crucial role in identifying sites of TB involvement. Despite its rarity, healthcare professionals should consider nasopharyngeal TB as a potential diagnosis when evaluating nasopharyngeal masses.</p>","PeriodicalId":519894,"journal":{"name":"Tuberkuloz ve toraks","volume":"72 2","pages":"167-172"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11390073/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of age and smoking in NSCLC patients with uncommon EGFR mutations.","authors":"Yosuke Maezawa, Manato Taguchi, Takeshi Kawakami, Toshihide Inui, Shinichiro Okauchi, Takeshi Numata, Toshihiro Shiozawa, Kunihiko Miyazaki, Ryota Nakamura, Kesato Iguchi, Takeo Endo, Tohru Sakamoto, Hiroaki Satoh, Nobuyuki Hizawa","doi":"10.5578/tt.202402913","DOIUrl":"10.5578/tt.202402913","url":null,"abstract":"<p><strong>Introduction: </strong>In addition to the two common epidermal growth factor receptor (EGFR) mutations, there are many uncommon mutations. Due to the high number of uncommon types, as well as the rarity of patients, there is lack of information regarding patient demographics, especially age distribution and smoking status. Against this background, we conducted an analysis to clarify the background of patients with uncommon EGFR mutations, especially considering their age distribution and smoking status.</p><p><strong>Materials and methods: </strong>We retrospectively reviewed the medical records of non-small cell lung cancer (NSCLC) patients diagnosed in a multicenter clinical practice from 2002 to 2023. Patients included all cases of non-advanced and advanced NSCLC with uncommon EGFR mutations.</p><p><strong>Result: </strong>Information on 158 patients with uncommon EGFR mutation was collected. Median age was 72 years, with the age distribution showing that most patients were in their 70s. There was a significant difference between the proportion of patients aged up to 59 years and the proportion aged 75 years or older. In 88 patients with a smoking habit history, a significant correlation was found between smoking index and age. Among non-smokers, there was a peak between ages 70 and 74, which was older than the peak among smokers.</p><p><strong>Conclusions: </strong>Even in elderly patients and NSCLC patients with a history of smoking, although it is unclear whether EGFR mutation is common or uncommon, EGFR gene testing should be performed considering the possibility of these patients being EGFR-positive.</p>","PeriodicalId":519894,"journal":{"name":"Tuberkuloz ve toraks","volume":"72 2","pages":"107-113"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11390093/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of lung ultrasound and ultrasound elastography in diagnosis of interstitial lung diseases.","authors":"Zarifa Abdullayeva, Müge Aydoğdu, Ebru Öztürk, Nilgün Yilmaz Demirci, Haluk Şaban Türktaş, Nurdan Köktürk","doi":"10.5578/tt.202402873","DOIUrl":"10.5578/tt.202402873","url":null,"abstract":"<p><strong>Introduction: </strong>Ultrasound elastography (US-E) is a novel, tissue stiffness-sensitive imaging method. We aimed to investigate whether lung ultrasound (US) and US-E can play a role in diagnosing interstitial lung diseases (ILDs) in which lung elasticity is affected due to fibrosis.</p><p><strong>Materials and methods: </strong>A prospective cohort study. Patients with ILD were defined as ''ILD group'' and with other pulmonary diseases as ''control group\". All subjects were examined and compared by lung US in B and elastography modes. Besides, the relationship between ultrasonography and high-resolution computerized tomography (HRCT) and chest X-ray findings was evaluated.</p><p><strong>Result: </strong>A total of 109 patients, 55 in ILD and 54 in the control group, with a mean age of 62 ± 14 years, were included. A positive correlation was found between the Warrick score (calculated from HRCT to determine the severity of ILD) and the number of B-lines (discrete vertical reverberation artifacts, indicating interstitial lung syndrome) in lung US (p= 0.001, r= 0.550) in the ILD group. In US-E, blue color (meaning more rigid tissue) dominated in the ILD group, and green color (indicating medium tissue stiffness) dominated in the control group (p= 0.001). Lung US diagnosed the ILD with 69% accuracy, 80% sensitivity, and 60% specificity compared to HRCT. Combined with chest X-ray, diagnostic accuracy was 74%, sensitivity 60%, and specificity 89%.</p><p><strong>Conclusions: </strong>Although lung US and US-E are not superior to gold standard HRCT in diagnosing ILDs, they can still be accepted as promising, novel, noninvasive tools, especially when combined with chest X-rays. Their role still needs to be clarified with further studies.</p>","PeriodicalId":519894,"journal":{"name":"Tuberkuloz ve toraks","volume":"72 2","pages":"95-106"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11390075/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring intensivist involvement: Patient characteristics, interventions and outcomes.","authors":"Hüseyin Arikan, Ayvaz Yeler, Ramazan Esen","doi":"10.5578/tt.202402940","DOIUrl":"10.5578/tt.202402940","url":null,"abstract":"<p><strong>Introduction: </strong>Intensivists play a critical role in the management of intensive care units (ICUs) and in providing high quality care. While international guidelines recommend intensivist staffing for improved patient outcomes, there is a shortage of qualified intensivists in many regions, including Türkiye. This study aimed to assess the impact of introducing a full-time intensivist to a medical ICU on patient characteristics, outcomes, and ICU interventions.</p><p><strong>Materials and methods: </strong>This retrospective study analyzed data from the Internal Medicine ICU at Van Yüzüncü Yıl University Dursun Odabaş Medical Center over two periods: Pre- and post-intensivist recruitment. The study included adult patients admitted to the ICU from February 2018 to January 2020. Patient demographics, reasons for ICU admission, APACHE-II and SOFA scores, ICU interventions, and outcomes were recorded and compared between the two periods.</p><p><strong>Result: </strong>Of the 868 patients admitted during the study period, 820 were included in the analysis. There were no significant differences in demographic characteristics between the pre- and post-intensivist periods. However, patients in the post-intensivist period had higher APACHE-II and SOFA scores. Intensive care units mortality rates were comparable between the two periods. The post-intensivist period saw increased use of invasive mechanical ventilation and non-invasive ventilation compared to the pre-intensivist period. Renal replacement therapy usage and enteral nutrition provision also increased in the post-intensivist period. ICU and hospital lengths of stay remained similar between the two periods.</p><p><strong>Conclusions: </strong>The introduction of a full-time intensivist to the medical ICU led to changes in ICU interventions, including increased use of mechanical ventilation and renal replacement therapy. Despite these changes, ICU mortality rates remained unchanged. Further research is needed to explore the longterm impact of intensivist staffing on patient outcomes in Türkiye.</p>","PeriodicalId":519894,"journal":{"name":"Tuberkuloz ve toraks","volume":"72 2","pages":"145-151"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11390079/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The relation of lactate level and carbon dioxide pressure discrepancies between transcutaneous and arterial measurements.","authors":"Aslıhan Gürün Kaya, Şeyda Nur Özpinar, Miraç Öz, Serhat Erol, Fatma Arslan, Aydın Çiledağ, Akın Kaya","doi":"10.5578/tt.202402920","DOIUrl":"10.5578/tt.202402920","url":null,"abstract":"<p><strong>Introduction: </strong>Partial carbondioxide pressure of the arterial blood (PaCO2) is used to evaluate alveolar ventilation. Transcutaneous carbon dioxide pressure (TcCO2) monitoring has been developed as a non-invasive (NIV) alternative to arterial blood gas analysis (ABG). Studies have shown that decreased tissue perfusion leads to increased carbondioxide (CO2). The use of transcutaneous capnometry may be unreliable in patients with perfusion abnormalities. In this study, we aimed to evaluate the relation between TcCO2-PaCO2 and lactate level which is recognized as a marker of hypoperfusion.</p><p><strong>Materials and methods: </strong>In this prospective cohort study in critical care patients with hypercapnic respiratory failure (PaCO2 ≥45 mmHg) who received NIV between April 2019 and January 2020 in the intensive care unit were enrolled in the study. Patients' simultaneously measured TcCO2 and PaCO2 values of hypercapnic patients were recorded. Each paired measurement was categorized into two groups; normal lactate (<2 mmol/L) and increased lactate (≥2 mmol/L).</p><p><strong>Result: </strong>A total of 116 paired TcCO2 and PaCO2 measurements of 29 patients were recorded. Bland-Altman analysis showed the mean bias between the TcCO2 and PaCO2 and 95% limits of agreement (LOA) in all measurements (1.75 mmHg 95% LOA -3.67 to 7.17); in the normal lactate group (0.66 mmHg 95% LOA -1.71 to 3.03); and in the increased lactate group (5.17 mmHg 95% LOA -1.63 to 11.97). The analysis showed a correlation between lactate level and the difference between TcCO2 and PaCO2 (r= 0.79, p< 0.001) and a negative correlation between mean blood pressure and the difference between TcCO2 and PaCO2 (r= -0.54, p= 0.001). Multiple regression analysis results showed that lactate level was independently associated with increased differences between TcCO2 and PaCO2 (Beta= 0.875, p< 0.001).</p><p><strong>Conclusions: </strong>TcCO2 monitoring may not be reliable in patients with increased lactate levels. TcCO2 levels should be checked by ABG analysis in these patients.</p>","PeriodicalId":519894,"journal":{"name":"Tuberkuloz ve toraks","volume":"72 2","pages":"120-130"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11390064/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Are omicron infections more frequently associated with bacterial co-infections?","authors":"Faig Teymurlu, Yaşar Selim Sarsilmaz, Özge Güzel Aygören, Beltinge Gültekin, Şeymanur Gül, Aslı Suner, Abdullah Sayiner","doi":"10.5578/tt.202402885","DOIUrl":"10.5578/tt.202402885","url":null,"abstract":"<p><strong>Introduction: </strong>Clinical observations suggest that Omicron infections may present with different radiographic findings and be more frequently associated with bacterial co-infections, but there is a paucity of published data. This study aimed to compare the clinical and radiographic findings of patients hospitalized with Omicron versus alpha-delta infections.</p><p><strong>Materials and methods: </strong>Between January 1, 2021 and June 30, 2021 (alpha and delta period) and between January 1, 2022 and July 31, 2022 (Omicron period), respectively 149 and 163 COVID-19 PCR-positive patients who were followed up in the COVID-19 ward and intensive care unit of a tertiary care center were included in the study. Clinical (presence of fever and purulent sputum), laboratory and radiologic findings of the two groups were compared. Sputum culture results and antibiotic use were also evaluated.</p><p><strong>Result: </strong>In the alpha/delta group, ground glass opacities were seen in 75.2% (112) of the patients, consolidation in 2.7% (4), and both findings together in 6.0% (9). In the Omicron group, ground glass was seen in 40.5% (66), consolidation in 5.5% (9), and both ground glass and consolidation together in 8.7% (13) (p< 0.001). Procalcitonin levels were 0.25 µg/L or higher in 29.6% and 43.9% of the patients in the alpha/delta and Omicron groups, respectively. Mean PCT values were 0.36 µg/L and 1.93 µg/L, respectively (p> 0.05). CRP levels were similar in both groups. Mean LDH level in the Omicron group was 278 U/L and was significantly lower than the alpha/delta group (381 U/L) (p< 0.001). The proportion of patients requiring intensive care during hospitalization was higher in the alpha/delta group (36.2% vs 26.4%) (p= 0.06).</p><p><strong>Conclusions: </strong>Lower LDH levels, less need for intensive care and less frequent development of ARDS indicate that Omicron causes milder disease, while a higher rate of consolidation and higher procalcitonin levels suggest a higher frequency of bacterial co-infections.</p>","PeriodicalId":519894,"journal":{"name":"Tuberkuloz ve toraks","volume":"72 2","pages":"131-136"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11390068/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The definition of remission in asthma should be unique and specific.","authors":"İnsu Yilmaz, Gülden Paçaci Çetin, Murat Türk","doi":"10.5578/tt.202402909","DOIUrl":"10.5578/tt.202402909","url":null,"abstract":"","PeriodicalId":519894,"journal":{"name":"Tuberkuloz ve toraks","volume":"72 2","pages":"176-178"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11390085/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retrospective evaluation of the effects of pulmonary artery and aortic diameters on hospitalization duration and survival in patients hospitalized with COVID-19.","authors":"Derya Doğan, Cantürk Taşçi, Deniz Doğan, Nesrin Öcal, Yakup Arslan, Uğur Bozlar","doi":"10.5578/tt.202402930","DOIUrl":"10.5578/tt.202402930","url":null,"abstract":"<p><strong>Introduction: </strong>This study explores the impact of vascular diameters on mortality risk in Coronavirus disease-2019 (COVID-19) patients. COVID-19, caused by severe acute respiratory syndrome Coronavirus 2 (SARS-CoV-2), presents diverse clinical manifestations and is associated with thrombosis.</p><p><strong>Materials and methods: </strong>In this study, we retrospectively examined the data of patients who were hospitalized and treated in our hospital between September 1, 2020, and November 30, 2020, and whose COVID-19 diagnosis was confirmed by reverse transcriptase polymerase chain reaction (RT-PCR). The diameters of the ascending aorta, main pulmonary artery, and right and left pulmonary arteries were measured from the chest computed tomography (CT) scans taken at the time of admission. The aim of the study was to investigate the impact of vascular diameters on the course of the disease.</p><p><strong>Result: </strong>Of 1.705 patients, 840 were eligible for the study. We concluded that 36 of the patients (4.3%) died, and among the non-survivors patients, 12 (33.3%) were females, and 24 (66.7%) were males. Hospitalization duration was 7.1 ± 3.1 vs. 6.1 ± 2 days (p= 0.004) in surviving and non-surviving patients respectively. On the other hand, we found the mean diameters of the right pulmonary artery in the chest CT of patients to be 2.17 ± 0.35 vs. 2.44 ± 0.29 cm in survivors and non-survivors, respectively (p< 0.001). In addition, we found the mean diameters of the left pulmonary artery 2.12 ± 0.32 vs. 2.34 ± 0.28 cm in survivors and non-survivors, respectively (p< 0.001). Mean diameters of the ascending aorta were 3.53 ± 0.46 vs. 3.72 ± 0.34 cm in survivors and non-survivors, respectively (p= 0.017).</p><p><strong>Conclusions: </strong>The study underscores the potential prognostic value of vascular diameters, especially in the ascending aorta and main pulmonary artery, as indicators of mortality risk in COVID-19 patients. The association between vascular dilation and severity of COVID-19, coupled with elevated D-dimer levels, suggests a link between thrombosis and vascular involvement.</p>","PeriodicalId":519894,"journal":{"name":"Tuberkuloz ve toraks","volume":"72 2","pages":"137-144"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11390091/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The performance of Khorana risk score for prediction of venous thromboembolism in patients with lung cancer: A retrospective cohort study.","authors":"Deniz Kizilirmak, Uğur Fidan, Yavuz Havlucu","doi":"10.5578/tt.202402921","DOIUrl":"10.5578/tt.202402921","url":null,"abstract":"<p><strong>Introduction: </strong>Cancer-related venous thromboembolism is one of the leading causes of mortality and morbidity in cancer patients. Lung cancer is the second most common cancer in the world and is closely related to venous thromboembolism. Venous thromboembolism affects survival in patients with cancer and it is important to be able to predict the possibility of thrombosis in patients with cancer. It was aimed to evaluate the predictive performance of the Khorana risk score in patients with lung cancer.</p><p><strong>Materials and methods: </strong>The medical data of the patients followed up with lung cancer were analyzed retrospectively. Venous thromboembolism events in lung cancer patients were described. The relationship between the Khorana risk score and the risk of venous thromboembolism was investigated using the cumulative incidence function with compared risk models.</p><p><strong>Result: </strong>Eight hundred fourteen lung cancer patients were included in the study. Venous thromboembolism was detected in 79 (9.7%) of the patients. Sixty one (77.2%) of the patients had pulmonary embolism, 15 (19%) had peripheral deep vein thrombosis and three (3.8%) had venous thrombosis of other sites. The cumulative incidences of venous thromboembolism for high and intermediate Khorana risk scores were 10.1% and 9.7%, respectively (p= 0.09). The cumulative incidences of venous thromboembolism at 3, 6, 12, and 24 months were 4.7%, 5.8%, 6.4%, and 9.6% for the high-grade Khorana risk score; 4.6%, 5.7%, 6.3% and 7.8% for the intermediate Khorana risk score (p= 0.11).</p><p><strong>Conclusions: </strong>The Khorana risk score was not found useful in the risk stratification of venous thromboembolism (intermediate or high risk) in patients with lung cancer. New scoring systems are needed to calculate the risk of venous thromboembolism in patients with lung cancer.</p>","PeriodicalId":519894,"journal":{"name":"Tuberkuloz ve toraks","volume":"72 2","pages":"114-119"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11390077/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of peripheral lymphocyte subsets and T-cell exhaustion in SARS-CoV-2 Infection.","authors":"Şadan Soyyiğit, Dilek Öksüzer Çimşir, Ali Öncül, Aysel Pekel, Ferda Öner Erkekol, Rahmet Güner, Seval İzdeş, Derya Gökmen, Şerife Gökbulut Bektaş, Osman İnan, Emin Gemcioğlu, Abdurrezzak Yılmaz, Enes Seyda Şahiner, İmran Hasanoğlu, Ayşe Kaya Kalem, Bircan Kayaaslan, Fatma Eser, İhsan Ateş","doi":"10.5578/tt.202402929","DOIUrl":"https://doi.org/10.5578/tt.202402929","url":null,"abstract":"<p><strong>Introduction: </strong>: Immune responses against Coronavirus (SARS-CoV-2) may be highly complex. It has been suggested that T-cell fatigue develops due to continuous stimulation of T-cells by SARS-CoV-2 in Coronavirus disease-2019 (COVID-19). It was aimed to assess peripheral lymphocyte subsets and T-cell exhaustion in various clinical courses of the disease in patients diagnosed with COVID-19.</p><p><strong>Materials and methods: </strong>This study included 150 patients who were assigned into the \"mild-to-moderate disease\" group, or \"severe disease\" group based on their clinical and laboratory characteristics. Peripheral lymphocyte subsets and T-cell exhaustion markers [programmed cell death protein 1 (PD-1) and T-cell immunoglobulin and mucin-domain containing-3 (Tim-3)] were determined in the peripheral blood using flow cytometry.</p><p><strong>Result: </strong>Mean (±SD) age was 53.3 ± 14.5 years, and female to male ratio was 55/95. In the mild-to-moderate disease (MMD) group, 55 patients had pneumonia and 20 patients had COVID-19 without pneumonia. In the severe disease (SD) group, 43 patients had severe pneumoniae and 32 patients were in critical condition. Lymphocyte counts were less than 1.0 x 109/L in 69.3% of the patients in the SD group, and the difference between the MMD group and SD group was statistically significant (p= 0.001). Total T cells, CD4+ and CD8+ T-cell counts were significantly lower in the SD group vs. MMD group (p< 0.001, p< 0.001, p< 0.001, respectively). PD-1 expression by CD8+ and CD4 T+ cells was higher (p= 0.042, p= 0.029, respectively) and Tim-3 expression from CD4 T+ cells was lower (p= 0.000) in the SD group vs. MMD group. Serum IFN-γ levels were not statistically different in the MMD and SD groups (p= 0.2).</p><p><strong>Conclusions: </strong>T-cell counts may be significantly reduced along with an increased expression of the T-cell exhaustion marker PD-1 in severe COVID-19, but Tim-3 expression was not increased in our study patients.</p>","PeriodicalId":519894,"journal":{"name":"Tuberkuloz ve toraks","volume":"72 2","pages":"152-166"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}