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1.
J Thorac Oncol ; 17(5): 661-674, 2022 05.
Article in English | MEDLINE | ID: covidwho-1804668

ABSTRACT

INTRODUCTION: Patients with thoracic malignancies are at increased risk for mortality from coronavirus disease 2019 (COVID-19), and a large number of intertwined prognostic variables have been identified so far. METHODS: Capitalizing data from the Thoracic Cancers International COVID-19 Collaboration (TERAVOLT) registry, a global study created with the aim of describing the impact of COVID-19 in patients with thoracic malignancies, we used a clustering approach, a fast-backward step-down selection procedure, and a tree-based model to screen and optimize a broad panel of demographics and clinical COVID-19 and cancer characteristics. RESULTS: As of April 15, 2021, a total of 1491 consecutive eligible patients from 18 countries were included in the analysis. With a mean observation period of 42 days, 361 events were reported with an all-cause case fatality rate of 24.2%. The clustering procedure screened 73 covariates in 13 clusters. A further multivariable logistic regression for the association between clusters and death was performed, resulting in five clusters significantly associated with the outcome. The fast-backward step-down selection procedure then identified the following seven major determinants of death: Eastern Cooperative Oncology Group-performance status (ECOG-PS) (OR = 2.47, 1.87-3.26), neutrophil count (OR = 2.46, 1.76-3.44), serum procalcitonin (OR = 2.37, 1.64-3.43), development of pneumonia (OR = 1.95, 1.48-2.58), C-reactive protein (OR = 1.90, 1.43-2.51), tumor stage at COVID-19 diagnosis (OR = 1.97, 1.46-2.66), and age (OR = 1.71, 1.29-2.26). The receiver operating characteristic analysis for death of the selected model confirmed its diagnostic ability (area under the receiver operating curve = 0.78, 95% confidence interval: 0.75-0.81). The nomogram was able to classify the COVID-19 mortality in an interval ranging from 8% to 90%, and the tree-based model recognized ECOG-PS, neutrophil count, and c-reactive protein as the major determinants of prognosis. CONCLUSIONS: From 73 variables analyzed, seven major determinants of death have been identified. Poor ECOG-PS was found to have the strongest association with poor outcome from COVID-19. With our analysis, we provide clinicians with a definitive prognostication system to help determine the risk of mortality for patients with thoracic malignancies and COVID-19.


Subject(s)
COVID-19 , Lung Neoplasms , Thoracic Neoplasms , C-Reactive Protein , COVID-19 Testing , Humans , Lung Neoplasms/diagnosis , Prognosis , Registries , Retrospective Studies , SARS-CoV-2 , Thoracic Neoplasms/diagnosis
2.
Mol Ther Nucleic Acids ; 27: 1235-1248, 2022 Mar 08.
Article in English | MEDLINE | ID: covidwho-1683484

ABSTRACT

Cyclic (di)nucleotides act as universal second messengers endogenously produced by several pathogens. Specifically, the roles of c-di-AMP in Mycobacterium tuberculosis immunity and virulence have been largely explored, although its contribution to the safety and efficacy of live tuberculosis vaccines is less understood. In this study, we demonstrate that the synthesis of c-di-AMP is negatively regulated by the M. tuberculosis PhoPR virulence system. Accordingly, the live attenuated tuberculosis vaccine candidate M. tuberculosis vaccine (MTBVAC), based on double phoP and fadD26 deletions, produces more than 25- and 45-fold c-di-AMP levels relative to wild-type M. tuberculosis or the current vaccine bacille Calmette-Guérin (BCG), respectively. Secretion of this second messenger was exclusively detected in MTBVAC but not in M. tuberculosis or in BCG. We also demonstrate that c-di-AMP synthesis during in vitro cultivation of M. tuberculosis is a growth-phase- and medium-dependent phenotype. To uncover the role of this metabolite in the vaccine properties of MTBVAC, we constructed and validated knockout and overproducing/oversecreting derivatives by inactivating the disA or cnpB gene, respectively. All MTBVAC derivatives elicited superior interleukin-1ß (IL-1ß) responses compared with BCG during an in vitro infection of human macrophages. However, both vaccines failed to elicit interferon ß (IFNß) activation in this cellular model. We found that increasing c-di-AMP levels remarkably correlated with a safer profile of tuberculosis vaccines in the immunodeficient mouse model. Finally, we demonstrate that overproduction of c-di-AMP due to cnpB inactivation resulted in lower protection of MTBVAC, while the absence of c-di-AMP in the MTBVAC disA derivative maintains the protective efficacy of this vaccine in mice.

3.
Am J Physiol Lung Cell Mol Physiol ; 322(3): L462-L478, 2022 03 01.
Article in English | MEDLINE | ID: covidwho-1622104

ABSTRACT

There is an urgent need to understand how SARS-CoV-2 infects the airway epithelium and in a subset of individuals leads to severe illness or death. Induced pluripotent stem cells (iPSCs) provide a near limitless supply of human cells that can be differentiated into cell types of interest, including airway epithelium, for disease modeling. We present a human iPSC-derived airway epithelial platform, composed of the major airway epithelial cell types, that is permissive to SARS-CoV-2 infection. Subsets of iPSC-airway cells express the SARS-CoV-2 entry factors angiotensin-converting enzyme 2 (ACE2), and transmembrane protease serine 2 (TMPRSS2). Multiciliated cells are the primary initial target of SARS-CoV-2 infection. On infection with SARS-CoV-2, iPSC-airway cells generate robust interferon and inflammatory responses, and treatment with remdesivir or camostat mesylate causes a decrease in viral propagation and entry, respectively. In conclusion, iPSC-derived airway cells provide a physiologically relevant in vitro model system to interrogate the pathogenesis of, and develop treatment strategies for, COVID-19 pneumonia.


Subject(s)
COVID-19 , Induced Pluripotent Stem Cells , Pluripotent Stem Cells , Epithelial Cells , Humans , SARS-CoV-2
5.
[Unspecified Source]; 2020.
Non-conventional in English | [Unspecified Source] | ID: grc-750471

ABSTRACT

The most severe and fatal infections with SARS-CoV-2 result in the acute respiratory distress syndrome, a clinical phenotype of coronavirus disease 2019 (COVID-19) that is associated with virions targeting the epithelium of the distal lung, particularly the facultative progenitors of this tissue, alveolar epithelial type 2 cells (AT2s). Little is known about the initial responses of human lung alveoli to SARS-CoV-2 infection due in part to inability to access these cells from patients, particularly at early stages of disease. Here we present an in vitro human model that simulates the initial apical infection of the distal lung epithelium with SARS-CoV-2, using AT2s that have been adapted to air-liquid interface culture after their derivation from induced pluripotent stem cells (iAT2s). We find that SARS-CoV-2 induces a rapid global transcriptomic change in infected iAT2s characterized by a shift to an inflammatory phenotype predominated by the secretion of cytokines encoded by NF-kB target genes, delayed epithelial interferon responses, and rapid loss of the mature lung alveolar epithelial program. Over time, infected iAT2s exhibit cellular toxicity that can result in the death of these key alveolar facultative progenitors, as is observed in vivo in COVID-19 lung autopsies. Importantly, drug testing using iAT2s confirmed the efficacy of TMPRSS2 protease inhibition, validating putative mechanisms used for viral entry in human alveolar cells. Our model system reveals the cell-intrinsic responses of a key lung target cell to infection, providing a platform for further drug development and facilitating a deeper understanding of COVID-19 pathogenesis.

6.
Hum Vaccin Immunother ; 17(11): 4299-4327, 2021 11 02.
Article in English | MEDLINE | ID: covidwho-1508315

ABSTRACT

TIPiCO is an annual expert meeting and workshop on infectious diseases and vaccination. The edition of 2020 changed its name and format to aTIPiCO, the first series and podcasts on infectious diseases and vaccines. A total of 13 prestigious experts from different countries participated in this edition launched on the 26 November 2020. The state of the art of coronavirus disease-2019 (COVID-19) and the responsible pathogen, the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), and the options to tackle the pandemic situation were discussed in light of the knowledge in November 2020. Despite COVID-19, the status of other infectious diseases, including influenza infections, respiratory syncytial virus disease, human papillomavirus infection, measles, pertussis, tuberculosis, meningococcal disease, and pneumococcal disease, were also addressed. The essential lessons that can be learned from these diseases and their vaccines to use in the COVID-19 pandemic were also commented with the experts.


Subject(s)
COVID-19 , Communicable Diseases , Influenza Vaccines , Communicable Diseases/epidemiology , Humans , Pandemics , SARS-CoV-2
7.
Sci Rep ; 11(1): 21185, 2021 10 27.
Article in English | MEDLINE | ID: covidwho-1493214

ABSTRACT

Interferon lambda 4 (IFNλ4) has shown antiviral activity against RNA viruses, including some coronaviruses. Besides, genetic variants of IFNL4 can be predictive of the clearance of RNA viruses. However, little is known about the effect of these genetic variants on SARS-CoV-2 infection. In this study, we investigated whether there was a relationship of the rs12979860 polymorphism of IFNL4 with COVID-19. We found that the T allele of rs12979860 was overexpressed in COVID-19 patients with regard to the general population without this disease (36.16% vs. 26.40%, p = 6.4 × 10-4; OR 0.633 C vs T; 95% CI 0.487, 0.824), suggesting that this allele could be a risk factor for COVID-19. Accordingly, the CC genotype was significantly lower in COVID-19 patients compared to controls (37.85% vs. 55.51%, p = 8 × 10-5; OR 0.488; 95% CI 0.342, 0.698). These results were not affected by sex, age, and disease severity in patients with COVID-19. Our findings suggest that, like other infectious diseases caused by RNA viruses, genetic variants of IFNL4 can predispose to COVID-19. Confirmation of our results may contribute to better understanding the mechanisms of this disease.


Subject(s)
COVID-19/genetics , COVID-19/immunology , Interleukins/genetics , Polymorphism, Single Nucleotide , SARS-CoV-2 , Adult , Aged , Aged, 80 and over , COVID-19/epidemiology , Case-Control Studies , Female , Gene Frequency , Genetic Predisposition to Disease , Humans , Male , Middle Aged , Pandemics , Risk Factors , Spain/epidemiology
8.
J Thromb Thrombolysis ; 53(2): 471-478, 2022 Feb.
Article in English | MEDLINE | ID: covidwho-1198486

ABSTRACT

An increased risk of venous thromboembolism (VTE) in hospitalized patients with COVID-19 has been reported. We aimed to describe the incidence rate of VTE on patients with non-hematological cancer who required hospitalization due to COVID-19 at our center. In this prospective study, non-hematological cancer patients hospitalized for confirmed COVID-19 at our institution from 1st March to 30th April 2020, were evaluated daily for VTE complications during their hospital stay, and after discharge until 30th June 2020. Furthermore, Doppler ultrasound of lower limbs was routinely performed in asymptomatic patients based on D-dimer levels and current active cancer therapy. The primary outcome of this study was the cumulative incidence of VTE. Secondary outcomes were the cumulative incidence of bleeding and mortality. A total of 58 hospitalized non-hematological cancer patients and confirmed COVID-19 were identified. Median follow-up since initial symptoms of COVID-19 was 91 days (IQR 19-104). Pulmonary embolism was diagnosed in three (5%) patients. Symptomatic catheter-related deep vein thrombosis (DVT) was observed in one patient. Doppler ultrasound of lower limbs was done in 11 asymptomatic patients, showing distal DVT in two of them (18%). The cumulative incidence of VTE on day 14 after admission was 10%, without new VTE events after hospital discharge and up to 90 days follow-up. No bleeding complication was observed. Seventeen patients (29%) died in the first 14 days after COVID-19 diagnosis. Four patients died after discharge due to malignancy progression. The cumulative incidence of VTE in non-hematological cancer patients under active treatment was 10% at day 14 after admission, with no further new events in the following 12 weeks.


Subject(s)
COVID-19 , Neoplasms , Pulmonary Embolism , Venous Thromboembolism , Venous Thrombosis , COVID-19/complications , COVID-19 Testing , Hospitalization , Humans , Incidence , Neoplasms/complications , Neoplasms/therapy , Prospective Studies , Pulmonary Embolism/diagnosis , Pulmonary Embolism/epidemiology , Risk Factors , SARS-CoV-2 , Spain/epidemiology , Venous Thromboembolism/diagnosis , Venous Thromboembolism/epidemiology , Venous Thrombosis/diagnosis , Venous Thrombosis/epidemiology
9.
Stem Cell Reports ; 16(4): 940-953, 2021 04 13.
Article in English | MEDLINE | ID: covidwho-1180038

ABSTRACT

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection leading to coronavirus disease 2019 (COVID-19) usually results in respiratory disease, but extrapulmonary manifestations are of major clinical interest. Intestinal symptoms of COVID-19 are present in a significant number of patients, and include nausea, diarrhea, and viral RNA shedding in feces. Human induced pluripotent stem cell-derived intestinal organoids (HIOs) represent an inexhaustible cellular resource that could serve as a valuable tool to study SARS-CoV-2 as well as other enteric viruses that infect the intestinal epithelium. Here, we report that SARS-CoV-2 productively infects both proximally and distally patterned HIOs, leading to the release of infectious viral particles while stimulating a robust transcriptomic response, including a significant upregulation of interferon-related genes that appeared to be conserved across multiple epithelial cell types. These findings illuminate a potential inflammatory epithelial-specific signature that may contribute to both the multisystemic nature of COVID-19 as well as its highly variable clinical presentation.


Subject(s)
COVID-19/pathology , Colon/pathology , Intestinal Mucosa/pathology , Organoids/pathology , Cell Line , Colon/virology , Epithelial Cells/virology , Humans , Induced Pluripotent Stem Cells/cytology , Inflammation/virology , Intestinal Mucosa/virology , Models, Biological , Organoids/cytology , Organoids/virology , SARS-CoV-2 , Virus Replication/physiology
10.
Life Sci ; 276: 119410, 2021 Jul 01.
Article in English | MEDLINE | ID: covidwho-1152567

ABSTRACT

BACKGROUND: The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus that causes de COVID-19 disease use as a principal receptor the angiotensin-converting enzyme-2 (ACE2). It has been suggested that dipeptidyl peptidase-4 (DPP4) can be another possible receptor for this virus. The present study aimed to establish if the DPP4 levels and DPP4 polymorphisms are associated with COVID-19 disease and its severity. METHODS: The study included 107 COVID-19 patients and 263 matched-healthy controls. Fifty patients required invasive mechanical ventilation. The DPP4 was quantified in serum using the Bioplex system. Based on the previous results and the functional prediction analysis, we select for the study 5 DPP4 polymorphisms (rs12617336, rs12617656, rs1558957, rs3788979, and rs17574) and these were determined using the 5´exonuclease TaqMan assays. RESULTS: Low levels of DPP4 were observed in COVID-19 patients (46.5 [33.1-57.7] ng/mL) when compared to healthy controls (125.3 [100.3-157.3] ng/mL) (P < 0.0001). Also, patients that required mechanical ventilation showed lower DPP4 levels (42.8 [29.8-56.9] ng/mL) than those that did not need this procedure (49.2 [39.9-65.6] ng/mL) (P = 0.012). DPP4 levels correlated negatively with age, fibrinogen, and platelet levels, and positively with albumin, alanine aminotransferase, and percentage of neutrophils. The DPP4 rs3788979 polymorphism was associated with a high risk of COVID-19 disease and, the TT genotype carriers had the lowest DPP4 levels. CONCLUSIONS: In summary, in the present study, an association of low levels of DPP4 with COVID-19 disease and severity was found. The association of the DPP4 rs3788979 polymorphism with COVID-19 is also reported.


Subject(s)
COVID-19/genetics , Dipeptidyl Peptidase 4/genetics , Adult , Aged , Angiotensin-Converting Enzyme 2/genetics , Angiotensin-Converting Enzyme 2/metabolism , COVID-19/enzymology , COVID-19/epidemiology , COVID-19/pathology , Dipeptidyl Peptidase 4/metabolism , Female , Gene Frequency , Humans , Male , Mexico/epidemiology , Middle Aged , Polymorphism, Single Nucleotide , SARS-CoV-2/isolation & purification , SARS-CoV-2/metabolism , Severity of Illness Index
11.
Am J Transplant ; 21(7): 2573-2582, 2021 07.
Article in English | MEDLINE | ID: covidwho-1147058

ABSTRACT

SARS-CoV-2 infection has produced high mortality in kidney transplant (KT) recipients, especially in the elderly. Until December 2020, 1011 KT with COVID-19 have been prospectively included in the Spanish Registry and followed until recovery or death. In multivariable analysis, age, pneumonia, and KT performed ≤6 months before COVID-19 were predictors of death, whereas gastrointestinal symptoms were protective. Survival analysis showed significant increasing mortality risk in four subgroups according to recipient age and time after KT (age <65 years and posttransplant time >6 months, age <65 and time ≤6, age ≥65 and time >6 and age ≥65 and time ≤6): mortality rates were, respectively, 11.3%, 24.5%, 35.4%, and 54.5% (p < .001). Patients were significantly younger, presented less pneumonia, and received less frequently specific anti-COVID-19 treatment in the second wave (July-December) than in the first one (March-June). Overall mortality was lower in the second wave (15.1 vs. 27.4%, p < .001) but similar in critical patients (66.7% vs. 58.1%, p = .29). The interaction between age and time post-KT should be considered when selecting recipients for transplantation in the COVID-19 pandemic. Advanced age and a recent KT should foster strict protective measures, including vaccination.


Subject(s)
COVID-19 , Kidney Transplantation , Aged , Humans , Infant , Kidney Transplantation/adverse effects , Pandemics , Registries , SARS-CoV-2 , Transplant Recipients
12.
Mol Cell ; 80(6): 1104-1122.e9, 2020 12 17.
Article in English | MEDLINE | ID: covidwho-933377

ABSTRACT

Human transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), causative pathogen of the COVID-19 pandemic, exerts a massive health and socioeconomic crisis. The virus infects alveolar epithelial type 2 cells (AT2s), leading to lung injury and impaired gas exchange, but the mechanisms driving infection and pathology are unclear. We performed a quantitative phosphoproteomic survey of induced pluripotent stem cell-derived AT2s (iAT2s) infected with SARS-CoV-2 at air-liquid interface (ALI). Time course analysis revealed rapid remodeling of diverse host systems, including signaling, RNA processing, translation, metabolism, nuclear integrity, protein trafficking, and cytoskeletal-microtubule organization, leading to cell cycle arrest, genotoxic stress, and innate immunity. Comparison to analogous data from transformed cell lines revealed respiratory-specific processes hijacked by SARS-CoV-2, highlighting potential novel therapeutic avenues that were validated by a high hit rate in a targeted small molecule screen in our iAT2 ALI system.


Subject(s)
Alveolar Epithelial Cells/metabolism , COVID-19/metabolism , Phosphoproteins/metabolism , Proteome/metabolism , SARS-CoV-2/metabolism , Alveolar Epithelial Cells/pathology , Alveolar Epithelial Cells/virology , Animals , Antiviral Agents , COVID-19/genetics , COVID-19/pathology , Chlorocebus aethiops , Cytopathogenic Effect, Viral , Cytoskeleton , Drug Evaluation, Preclinical , Humans , Induced Pluripotent Stem Cells/metabolism , Induced Pluripotent Stem Cells/pathology , Induced Pluripotent Stem Cells/virology , Phosphoproteins/genetics , Protein Transport , Proteome/genetics , SARS-CoV-2/genetics , Signal Transduction , Vero Cells , COVID-19 Drug Treatment
13.
Cell Stem Cell ; 27(6): 962-973.e7, 2020 12 03.
Article in English | MEDLINE | ID: covidwho-779662

ABSTRACT

A hallmark of severe COVID-19 pneumonia is SARS-CoV-2 infection of the facultative progenitors of lung alveoli, the alveolar epithelial type 2 cells (AT2s). However, inability to access these cells from patients, particularly at early stages of disease, limits an understanding of disease inception. Here, we present an in vitro human model that simulates the initial apical infection of alveolar epithelium with SARS-CoV-2 by using induced pluripotent stem cell-derived AT2s that have been adapted to air-liquid interface culture. We find a rapid transcriptomic change in infected cells, characterized by a shift to an inflammatory phenotype with upregulation of NF-κB signaling and loss of the mature alveolar program. Drug testing confirms the efficacy of remdesivir as well as TMPRSS2 protease inhibition, validating a putative mechanism used for viral entry in alveolar cells. Our model system reveals cell-intrinsic responses of a key lung target cell to SARS-CoV-2 infection and should facilitate drug development.


Subject(s)
Alveolar Epithelial Cells/virology , Inflammation/virology , SARS-CoV-2/physiology , Adenosine Monophosphate/analogs & derivatives , Adenosine Monophosphate/pharmacology , Alanine/analogs & derivatives , Alanine/pharmacology , Animals , Antiviral Agents/pharmacology , COVID-19/virology , Cells, Cultured , Drug Development , Enzyme Inhibitors/pharmacology , Humans , Models, Biological , Pluripotent Stem Cells/cytology , Pluripotent Stem Cells/virology , RNA-Seq , Serine Endopeptidases/metabolism , Virus Replication
14.
Transplantation ; 104(11): 2225-2233, 2020 11.
Article in English | MEDLINE | ID: covidwho-721042

ABSTRACT

BACKGROUND: Coronavirus infectious disease 2019 (COVID-19) pandemic has posed at risk the kidney transplant (KT) population. We describe clinical pictures, risk factors for death, and chances to recovery in a large cohort of KT recipients with COVID-19. METHODS: Inclusion in a Spanish prospectively filled registry was allowed for KT cases with confirmed COVID-19. Outcomes were assessed as in-hospital mortality or recovery. RESULTS: The study population comprised of 414 patients. Fever, respiratory symptoms, and dyspnea were the most frequent COVID-19-related symptoms, and 81.4% of them had pneumonia. More than one-third of patients showed digestive symptoms at diagnosis, combinations of nausea, vomiting, and diarrhea. Most patients were hospitalized, 12.1% in intensive care units, and 17.6% needed ventilator support. Treatment for COVID-19 included frequently hydroxychloroquine, azithromycin, high-dose steroids, lopinavir/ritonavir, and tocilizumab. After a mean follow-up of 44 days, the fatality rate was 26.3%. Pneumonia without gastrointestinal symptoms was associated with a 36.3% mortality (respiratory phenotype), and gastrointestinal symptoms without pneumonia with a 5.3% mortality (gastrointestinal phenotype). The mixed pneumonia and gastrointestinal phenotype showed an intermediate mortality of 19.5% (mixed phenotype). Multivariate Cox regression analysis showed that age and pneumonia were independently associated with death, whereas the gastrointestinal phenotype was associated with recovery. CONCLUSIONS: COVID-19 is frequent among the KT population. Advanced age and pneumonia are the main clinical features associated with a high-mortality rate. Gastrointestinal disease is associated with a more benign course and lower mortality.


Subject(s)
Coronavirus Infections/mortality , Gastrointestinal Diseases/virology , Kidney Transplantation , Pneumonia, Viral/mortality , Respiratory Tract Diseases/virology , Transplant Recipients , Aged , Betacoronavirus , COVID-19 , Female , Hospital Mortality , Humans , Male , Middle Aged , Multivariate Analysis , Pandemics , Phenotype , Proportional Hazards Models , Registries , Regression Analysis , SARS-CoV-2 , Spain , Survival Rate
15.
bioRxiv ; 2020 Aug 06.
Article in English | MEDLINE | ID: covidwho-637839

ABSTRACT

The most severe and fatal infections with SARS-CoV-2 result in the acute respiratory distress syndrome, a clinical phenotype of coronavirus disease 2019 (COVID-19) that is associated with virions targeting the epithelium of the distal lung, particularly the facultative progenitors of this tissue, alveolar epithelial type 2 cells (AT2s). Little is known about the initial responses of human lung alveoli to SARS-CoV-2 infection due in part to inability to access these cells from patients, particularly at early stages of disease. Here we present an in vitro human model that simulates the initial apical infection of the distal lung epithelium with SARS-CoV-2, using AT2s that have been adapted to air-liquid interface culture after their derivation from induced pluripotent stem cells (iAT2s). We find that SARS-CoV-2 induces a rapid global transcriptomic change in infected iAT2s characterized by a shift to an inflammatory phenotype predominated by the secretion of cytokines encoded by NF-kB target genes, delayed epithelial interferon responses, and rapid loss of the mature lung alveolar epithelial program. Over time, infected iAT2s exhibit cellular toxicity that can result in the death of these key alveolar facultative progenitors, as is observed in vivo in COVID-19 lung autopsies. Importantly, drug testing using iAT2s confirmed an antiviral dose-response to remdesivir and demonstrated the efficacy of TMPRSS2 protease inhibition, validating a putative mechanism used for viral entry in human alveolar cells. Our model system reveals the cell-intrinsic responses of a key lung target cell to infection, providing a physiologically relevant platform for further drug development and facilitating a deeper understanding of COVID-19 pathogenesis.

16.
Eur Arch Otorhinolaryngol ; 277(10): 2783-2792, 2020 Oct.
Article in English | MEDLINE | ID: covidwho-613073

ABSTRACT

OBJECTIVE: COVID-19 patients may present mild symptoms. The identification of paucisymptomatic patients is paramount in order to interrupt the transmission chain of the virus. Olfactory loss could be one of those early symptoms which might help in the diagnosis of COVID-19 patients. In this study, we aim to develop and validate a fast, inexpensive, reliable and easy-to-perform olfactory test for the screening of suspected COVID-19 patients. STUDY DESIGN: Phase I was a case-control study and Phase II a transversal descriptive study. SUBJECTS AND METHODS: Olfaction was assessed with the ethyl alcohol threshold test and symptoms with visual analogue scales. The study was designed in two phases: In Phase I, we compared confirmed COVID-19 patients and healthy controls. In Phase II, patients with suspected COVID-19 infection referred for testing were studied. RESULTS: 275 participants were included in Phase I, 135 in Phase II. The ROC curve showed an AUC of 0.749 in Phase I, 0.737 in Phase II. The cutoff value which offered the highest amount of correctly classified patients was ≥ 2 (10% alcohol) for all age intervals. The odds ratio was 8.19 in Phase I, 6.56 in Phase II with a 75% sensitivity. When cases report normal sense of smell (VAS < 4), it misdiagnoses 57.89% of patients detected by the alcohol threshold test. CONCLUSION: The olfactory loss assessed with the alcohol threshold test has shown high sensitivity and odds ratio in both patients with confirmed COVID-19 illness and participants with suspected SARS-CoV-2 infection.


Subject(s)
Betacoronavirus , Coronavirus Infections/complications , Ethanol/pharmacology , Olfaction Disorders/diagnosis , Pneumonia, Viral/complications , Adult , Aged , Aged, 80 and over , COVID-19 , Case-Control Studies , Costs and Cost Analysis , Female , Humans , Male , Middle Aged , Olfaction Disorders/etiology , Olfaction Disorders/physiopathology , Pandemics , SARS-CoV-2 , Smell , Young Adult
18.
Nefrologia (Engl Ed) ; 40(3): 272-278, 2020.
Article in English, Spanish | MEDLINE | ID: covidwho-611251

ABSTRACT

INTRODUCTION: The recent appearance of the SARS-CoV-2 coronavirus pandemic has had a significant impact on the general population. Patients on renal replacement therapy (RRT) have not been unaware of this situation and due to their characteristics they are especially vulnerable. We present the results of the analysis of the COVID-19 Registry of the Spanish Society of Nephrology. MATERIAL AND METHODS: The Registry began operating on March 18th, 2020. It collects epidemiological variables, contagion and diagnosis data, signs and symptoms, treatments and outcomes. It is an online registry. Patients were diagnosed with SARS-CoV-2 infection based on the results of the PCR of the virus, carried out both in patients who had manifested compatible symptoms or had suspicious signs, as well as in those who had undergone screening after some contact acquainted with another patient. RESULTS: As of April 11, the Registry had data on 868 patients, from all the Autonomous Communities. The most represented form of RRT is in-center hemodialysis (ICH) followed by transplant patients. Symptoms are similar to the general population. A very high percentage (85%) required hospital admission, 8% in intensive care units. The most used treatments were hydroxychloroquine, lopinavir-ritonavir, and steroids. Mortality is high and reaches 23%; deceased patients were more frequently on ICH, developed pneumonia more frequently, and received less frequently lopinavir-ritonavir and steroids. Age and pneumonia were independently associated with the risk of death. CONCLUSIONS: SARS-CoV-2 infection already affects a significant number of Spanish patients on RRT, mainly those on ICH, hospitalization rates are very high and mortality is high; age and the development of pneumonia are factors associated with mortality.


Subject(s)
Betacoronavirus , Coronavirus Infections/epidemiology , Nephrology/statistics & numerical data , Pandemics , Pneumonia, Viral/epidemiology , Registries/statistics & numerical data , Renal Replacement Therapy/statistics & numerical data , Age Factors , Aged , COVID-19 , Chi-Square Distribution , Coronavirus Infections/drug therapy , Coronavirus Infections/mortality , Female , Hemodialysis Units, Hospital/statistics & numerical data , Humans , Intensive Care Units/statistics & numerical data , Male , Middle Aged , Pneumonia, Viral/drug therapy , Pneumonia, Viral/mortality , SARS-CoV-2 , Societies, Medical , Spain/epidemiology , Statistics, Nonparametric , Symptom Assessment/statistics & numerical data , Transplant Recipients/statistics & numerical data
19.
Eur J Cancer ; 135: 242-250, 2020 08.
Article in English | MEDLINE | ID: covidwho-548773

ABSTRACT

AIM: Previous studies have suggested a more frequent and severe course of novel coronavirus SARS-CoV-2 infection in cancer patients undergoing active oncologic treatment. Our aim was to describe the characteristics of the disease in this population and to determine predictive factors for poor outcome in terms of severe respiratory distress (acute respiratory distress syndrome [ARDS]) or death. PATIENTS AND METHODS: Patients consecutively admitted for SARS-CoV-2 infection were prospectively collected, and retrospective statistical analysis was performed. Univariate and multivariate analyses were performed to assess potential factors for poor outcomes defined as ARDS or death. RESULTS: Sixty-three patients were analysed, and 34 of them developed respiratory failure (70% as ARDS). Lymphocytes/mm3 (412 versus 686; p = 0.001), serum albumin (2.84 versus 3.1); lactate dehydrogenase (LDH) (670 versus 359; p < 0.001) and C-reactive protein (CRP) levels (25.8 versus 9.9; p < 0.001) discriminate those that developed respiratory failure. Mortality rate was 25%, significantly higher among ARDS, neutropenic patients (p = 0.01) and in those with bilateral infiltrates (44% versus 0%; p < 0.001). Multivariate logistic analyses model confirmed the predictive value of severe neutropenia (odds ratio [OR] 16.54; 95% confidence interval [CI] 1.43-190.9, p 0.025), bilateral infiltrates (OR 32.83, CI 95% 3.51-307, p 0.002) and tumour lung involvement (OR 4.34, CI 95% 1.2-14.95, p 0.02). CONCLUSION: Cancer patients under active treatment admitted for SARS-CoV-2 infection have worse outcomes in terms of mortality and respiratory failure rates compared with COVID-19 global population. Lymphopenia, LDH, CRP and albumin discriminate illness severity, whereas neutropenia, bilateral infiltrates and tumour pulmonary involvement are predictive of higher mortality.


Subject(s)
Betacoronavirus/pathogenicity , Coronavirus Infections/mortality , Neoplasms/complications , Pneumonia, Viral/mortality , Respiratory Insufficiency/mortality , Aged , Antineoplastic Agents/adverse effects , Betacoronavirus/isolation & purification , COVID-19 , Coronavirus Infections/complications , Coronavirus Infections/diagnosis , Coronavirus Infections/virology , Female , Humans , Immunotherapy/adverse effects , Male , Middle Aged , Mortality , Neoplasms/therapy , Pandemics , Pneumonia, Viral/complications , Pneumonia, Viral/diagnosis , Pneumonia, Viral/virology , Prognosis , Prospective Studies , Respiratory Insufficiency/diagnosis , Respiratory Insufficiency/virology , Retrospective Studies , Risk Assessment , SARS-CoV-2
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