[Budesonide attenuates airway remodeling and modules the expression of Janus protein tyrosine kinase 1, and signal transducers and activators of transcription 6 in asthma: an experiment with mice].

Objective: To investigate the effects of budesonide (BUD) on the airway remodeling and the expression of Janus protein tyrosine kinases 1 (JAK1) and signal transducer and activator of transcription 6 (STAT6) in asthma.

Methods: Thirty female Balb/c mice were randomly divided into 3 equal groups: control group; asthma group, sensitized on day 1, 8, and 15 and challenged from day 21 to 52 with periodically repeated intranasal drip of ovalbumin (OVA); and BUD treated group, undergoing intranasal drip of OVA as mentioned above and intranasal administration of BUD 2 hours before each OVA challenge. 24 h after the final OVA inhalation an invasive single-chamber whole body plethysmograph was used to assess the airway responsiveness.

Evaluation by indirect immunofluorescent assay and enzyme linked immunosorbent assay of the dynamic changes of serum antibody responses against severe acute respiratory syndrome coronavirus.

Background: Severe acute respiratory syndrome coronavirus (SARS-CoV) is a newly emerging virus that gives rise to SARS patients with high rates of infectivity and fatality. To study the humoral immune responses to SARS-CoV, the authors evaluated IgG and IgM specific antibodies in patients' sera.

Methods: Two methods, enzyme-linked immunosorbent assay (ELISA) and indirect immunofluorescent assay (IFA), were used to detect specific serum IgG and IgM against SARS-CoV in 98 SARS patients and 250 controls consisting of patients with pneumonia, health-care professionals and healthy subjects.

Chemokine-like factor 1, a novel cytokine, contributes to airway damage, remodeling and pulmonary fibrosis.

Background: Chemokine-like factor 1 (CKLF1) was recently identified as a novel cytokine. The full-length CKLF1 cDNA contains 530 bp encoding 99 amino acid residues with a CC motif similar to that of other CC family chemokines. Recombinant CKLF1 exhibits chemotactic activity on leucocytes and stimulates proliferation of murine skeletal muscle cells.

[Protective effect of specific antibody in serum of convalescent patient with SARS].

Objective: To investigate inhibitory effect of serum severe acute respiratory syndrome (SARS) -specific antibodies from convalescent patients after half an year of onset on SARS-CoV-mediated cytopathic response.

Methods: SARS-CoV immunoglobulin G (IgG) antibody was determined by enzyme linked immunoadsorbent assay (ELISA). Twelve serum samples from convalescent patients, diluted by 1:8 with maintenance medium, were mixed with the three dilution supernatants of SARS-CoV.