Your browser doesn't support javascript.
Show: 20 | 50 | 100
Results 1 - 9 de 9
Clin Infect Dis ; 73(9): e2814-e2817, 2021 11 02.
Article in English | MEDLINE | ID: covidwho-1501023


Intrahost analysis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) genomic sequences identified 2 viral haplotypes comprised of 3 genetically linked mutations from the respiratory and intestinal tracts of a patient with coronavirus disease 2019. Spatiotemporal data suggest that this patient initially had dual infection of 2 SARS-CoV-2 variants, which subsequently redistributed into the 2 systems.

COVID-19 , SARS-CoV-2 , Genomics , Humans , Respiratory System
Front Immunol ; 12: 735125, 2021.
Article in English | MEDLINE | ID: covidwho-1441109


Background: The global outbreak of coronavirus disease 2019 (COVID-19) has turned into a worldwide public health crisis and caused more than 100,000,000 severe cases. Progressive lymphopenia, especially in T cells, was a prominent clinical feature of severe COVID-19. Activated HLA-DR+CD38+ CD8+ T cells were enriched over a prolonged period from the lymphopenia patients who died from Ebola and influenza infection and in severe patients infected with SARS-CoV-2. However, the CD38+HLA-DR+ CD8+ T population was reported to play contradictory roles in SARS-CoV-2 infection. Methods: A total of 42 COVID-19 patients, including 32 mild or moderate and 10 severe or critical cases, who received care at Beijing Ditan Hospital were recruited into this retrospective study. Blood samples were first collected within 3 days of the hospital admission and once every 3-7 days during hospitalization. The longitudinal flow cytometric data were examined during hospitalization. Moreover, we evaluated serum levels of 45 cytokines/chemokines/growth factors and 14 soluble checkpoints using Luminex multiplex assay longitudinally. Results: We revealed that the HLA-DR+CD38+ CD8+ T population was heterogeneous, and could be divided into two subsets with distinct characteristics: HLA-DR+CD38dim and HLA-DR+CD38hi. We observed a persistent accumulation of HLA-DR+CD38hi CD8+ T cells in severe COVID-19 patients. These HLA-DR+CD38hi CD8+ T cells were in a state of overactivation and consequent dysregulation manifested by expression of multiple inhibitory and stimulatory checkpoints, higher apoptotic sensitivity, impaired killing potential, and more exhausted transcriptional regulation compared to HLA-DR+CD38dim CD8+ T cells. Moreover, the clinical and laboratory data supported that only HLA-DR+CD38hi CD8+ T cells were associated with systemic inflammation, tissue injury, and immune disorders of severe COVID-19 patients. Conclusions: Our findings indicated that HLA-DR+CD38hi CD8+ T cells were correlated with disease severity of COVID-19 rather than HLA-DR+CD38dim population.

CD8-Positive T-Lymphocytes/immunology , COVID-19/immunology , Immune System Diseases/immunology , SARS-CoV-2 , Adult , Aged , CD8 Antigens/immunology , Cytokines/immunology , Female , HLA-DR Antigens/immunology , Humans , Male , Middle Aged , Retrospective Studies , Severity of Illness Index , Young Adult
Natl Sci Rev ; 8(4): nwab006, 2021 Apr.
Article in English | MEDLINE | ID: covidwho-1254806


After a short recovery period, COVID-19 reinfections could occur in convalescent patients, even those with measurable levels of neutralizing antibodies. Effective vaccinations and protective public health measures are recommended for the convalescent COVID-19 patients.

China Tropical Medicine ; 20(9):871-874, 2020.
Article in Chinese | GIM | ID: covidwho-890732


Objective: To explore and analyze the clinical characteristics, treatment and outcome of some coronavirus disease 2019 (COVID-19) patients in Guangzhou.

Sci Rep ; 10(1): 17718, 2020 10 19.
Article in English | MEDLINE | ID: covidwho-880700


COVID-19 has been widely spreading. We aimed to examine adaptive immune cells in non-severe patients with persistent SARS-CoV-2 shedding. 37 non-severe patients with persistent SARS-CoV-2 presence that were transferred to Zhongnan hospital of Wuhan University were retrospectively recruited to the PP (persistently positive) group, which was further allocated to PPP group (n = 19) and PPN group (n = 18), according to their testing results after 7 days (N = negative). Epidemiological, demographic, clinical and laboratory data were collected and analyzed. Data from age- and sex-matched non-severe patients at disease onset (PA [positive on admission] patients, n = 37), and lymphocyte subpopulation measurements from matched 54 healthy subjects were extracted for comparison (HC). Compared with PA patients, PP patients had much improved laboratory findings. The absolute numbers of CD3+ T cells, CD4+ T cells, and NK cells were significantly higher in PP group than that in PA group, and were comparable to that in healthy controls. PPP subgroup had markedly reduced B cells and T cells compared to PPN group and healthy subjects. Finally, paired results of these lymphocyte subpopulations from 10 PPN patients demonstrated that the number of T cells and B cells significantly increased when the SARS-CoV-2 tests turned negative. Persistent SARS-CoV-2 presence in non-severe COVID-19 patients is associated with reduced numbers of adaptive immune cells. Monitoring lymphocyte subpopulations could be clinically meaningful in identifying fully recovered COVID-19 patients.

B-Lymphocytes/cytology , Coronavirus Infections/pathology , Pneumonia, Viral/pathology , T-Lymphocytes/cytology , Adult , B-Lymphocytes/immunology , B-Lymphocytes/metabolism , Betacoronavirus/isolation & purification , CD4-Positive T-Lymphocytes/cytology , CD4-Positive T-Lymphocytes/immunology , CD4-Positive T-Lymphocytes/metabolism , COVID-19 , Case-Control Studies , Coronavirus Infections/immunology , Coronavirus Infections/virology , Female , Humans , Killer Cells, Natural/cytology , Killer Cells, Natural/immunology , Killer Cells, Natural/metabolism , Male , Pandemics , Pneumonia, Viral/immunology , Pneumonia, Viral/virology , Retrospective Studies , SARS-CoV-2 , Severity of Illness Index , T-Lymphocytes/immunology , T-Lymphocytes/metabolism
Signal Transduct Target Ther ; 5(1): 192, 2020 09 07.
Article in English | MEDLINE | ID: covidwho-748172

Betacoronavirus/pathogenicity , Coronavirus Infections/immunology , Cytokine Release Syndrome/immunology , Gene Expression Regulation/immunology , Lymphopenia/immunology , Pneumonia, Viral/immunology , T-Lymphocytes/immunology , Adult , Aged , Aged, 80 and over , Betacoronavirus/immunology , Biomarkers/blood , COVID-19 , Coronavirus Infections/diagnosis , Coronavirus Infections/genetics , Coronavirus Infections/mortality , Cytokine Release Syndrome/diagnosis , Cytokine Release Syndrome/genetics , Cytokine Release Syndrome/mortality , Disease Progression , Female , Hepatitis A Virus Cellular Receptor 2/blood , Hepatitis A Virus Cellular Receptor 2/genetics , Hepatitis A Virus Cellular Receptor 2/immunology , Humans , Indoleamine-Pyrrole 2,3,-Dioxygenase/blood , Indoleamine-Pyrrole 2,3,-Dioxygenase/genetics , Indoleamine-Pyrrole 2,3,-Dioxygenase/immunology , Lymphocyte Count , Lymphopenia/diagnosis , Lymphopenia/genetics , Lymphopenia/mortality , Male , Middle Aged , Pandemics , Pneumonia, Viral/diagnosis , Pneumonia, Viral/genetics , Pneumonia, Viral/mortality , Retrospective Studies , SARS-CoV-2 , Severity of Illness Index , Survival Analysis , T-Lymphocytes/virology , Tumor Necrosis Factor Receptor Superfamily, Member 7/blood , Tumor Necrosis Factor Receptor Superfamily, Member 7/genetics , Tumor Necrosis Factor Receptor Superfamily, Member 7/immunology , Tumor Necrosis Factor Receptor Superfamily, Member 9/blood , Tumor Necrosis Factor Receptor Superfamily, Member 9/genetics , Tumor Necrosis Factor Receptor Superfamily, Member 9/immunology
Hypertension ; 76(1): 51-58, 2020 07.
Article in English | MEDLINE | ID: covidwho-611682


With the capability of inducing elevated expression of ACE2 (angiotensin-converting enzyme 2), the cellular receptor for severe acute respiratory syndrome coronavirus 2, angiotensin II receptor blockers (ARBs) or ACE inhibitors treatment may have a controversial role in both facilitating virus infection and reducing pathogenic inflammation. We aimed to evaluate the effects of ARBs/ACE inhibitors on coronavirus disease 2019 (COVID-19) in a retrospective, single-center study. One hundred twenty-six patients with COVID-19 and preexisting hypertension at Hubei Provincial Hospital of Traditional Chinese Medicine in Wuhan from January 5 to February 22, 2020, were retrospectively allocated to ARBs/ACE inhibitors group (n=43) and non-ARBs/ACE inhibitors group (n=83) according to their antihypertensive medication. One hundred twenty-five age- and sex-matched patients with COVID-19 without hypertension were randomly selected as nonhypertension controls. In addition, the medication history of 1942 patients with hypertension that were admitted to Hubei Provincial Hospital of Traditional Chinese Medicine from November 1 to December 31, 2019, before the COVID-19 outbreak were also reviewed for external comparison. Epidemiological, demographic, clinical, and laboratory data were collected, analyzed, and compared between these groups. The frequency of ARBs/ACE inhibitors usage in patients with hypertension with or without COVID-19 were comparable. Among patients with COVID-19 and hypertension, those received either ARBs/ACE inhibitors or non-ARBs/ACE inhibitors had comparable blood pressure. However, ARBs/ACE inhibitors group had significantly lower concentrations of hs-CRP (high-sensitivity C-reactive protein; P=0.049) and PCT (procalcitonin, P=0.008). Furthermore, a lower proportion of critical patients (9.3% versus 22.9%; P=0.061) and a lower death rate (4.7% versus 13.3%; P=0.216) were observed in ARBs/ACE inhibitors group than non-ARBs/ACE inhibitors group, although these differences failed to reach statistical significance. Our findings thus support the use of ARBs/ACE inhibitors in patients with COVID-19 and preexisting hypertension.

Angiotensin Receptor Antagonists/therapeutic use , Angiotensin-Converting Enzyme Inhibitors/therapeutic use , Coronavirus Infections , Hypertension , Pandemics , Pneumonia, Viral , Aged , Angiotensin-Converting Enzyme 2 , Betacoronavirus/isolation & purification , C-Reactive Protein/analysis , COVID-19 , China/epidemiology , Comorbidity , Coronavirus Infections/epidemiology , Coronavirus Infections/immunology , Coronavirus Infections/therapy , Female , Humans , Hypertension/blood , Hypertension/drug therapy , Hypertension/epidemiology , Hypertension/virology , Male , Medication Therapy Management/statistics & numerical data , Middle Aged , Peptidyl-Dipeptidase A/metabolism , Pneumonia, Viral/epidemiology , Pneumonia, Viral/immunology , Pneumonia, Viral/therapy , Procalcitonin/analysis , Retrospective Studies , SARS-CoV-2 , Survival Analysis , Treatment Outcome