1.NINJ1 impairs the anti-inflammatory function of hUC-MSCs with synergistic IFN-γ and TNF-α stimulation.
Wang HU ; Guomei YANG ; Luoquan AO ; Peixin SHEN ; Mengwei YAO ; Yuchuan YUAN ; Jiaoyue LONG ; Zhan LI ; Xiang XU
Chinese Journal of Traumatology 2025;28(4):276-287
PURPOSE:
To investigate the regulatory role of nerve injury-induced protein 1 (NINJ1) in the anti-inflammatory function of human umbilical cord mesenchymal stem cells (hUC-MSCs) co-stimulated by interferon-gamma (IFN-γ) and tumor necrosis factor-alpha (TNF-α).
METHODS:
hUC-MSCs were expanded in vitro using standard protocols, with stem cell characteristics confirmed by flow cytometry and multilineage differentiation assays. The immunomodulatory properties and cellular activity of cytokine-co-pretreated hUC-MSCs were systematically evaluated via quantitative reverse transcription RT-qPCR, lymphocyte proliferation suppression assays, and Cell Counting Kit-8 viability tests. Transcriptome sequencing, Western blotting and small interfering RNA interference were integrated to analyze the regulatory mechanisms of NINJ1 expression. Functional roles of NINJ1 in pretreated hUC-MSCs were elucidated through gene silencing combined with lactate dehydrogenase release assays, Annexin V/Propidium Iodide apoptosis analysis, macrophage co-culture models, and cytokine Enzyme-Linked Immunosorbent Assay. Therapeutic efficacy was validated in a cecal ligation and puncture-induced septic mouse model: 80 mice were randomly allocated into 4 experimental groups (n=20/group): sham group (laparotomy without cecal ligation); phosphate-buffered saline-treated group (cecal ligation and puncture (CLP) + 0.1 mL phosphate-buffered saline); hUC-MSCs (small interfering RNA (siRNA)-interferon-gamma and tumor necrosis factor-alpha co-stimulation (IT))-treated group (CLP + hUC-MSCs transfected with scrambled siRNA); and hUC-MSCs (siNINJ1-IT)-treated group (CLP + hUC-MSCs with NINJ1-targeting siRNA).
RESULTS:
hUC-MSCs demonstrated compliance with International Society for Cellular Therapy criteria, confirming their stem cell identity. IFN-γ/TNF-α co-pretreatment enhanced the immunosuppressive capacity of hUC-MSCs, accompanied by the reduction of cellular viability, while concurrently upregulating pro-inflammatory cytokines such as interleukin-6 and interleukin-1β. This co-stimulation significantly elevated NINJ1 expression in hUC-MSCs, whereas genetic silencing of NINJ1 effectively suppressed pro-inflammatory cytokine production and attenuated damage-associated molecular patterns release through inhibition of programmed plasma membrane rupture. Furthermore, the NINJ1 interference potentiated the ability of cytokine-pretreated hUC-MSCs to suppress LPS-induced pro-inflammatory responses in RAW264.7 macrophages. In cecal ligation and puncture-induced sepsis model, NINJ1-silenced hUC-MSCs exhibited enhanced therapeutic efficacy, manifested by reduced systemic inflammation and multi-organ damage.
CONCLUSION
Our findings shed new light on the immunomodulatory functions of cytokine-primed MSCs, offering groundbreaking insights for developing MSC-based therapies against inflammatory diseases via interfering the expression of NINJ1.
Mesenchymal Stem Cells/drug effects*
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Animals
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Interferon-gamma/pharmacology*
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Tumor Necrosis Factor-alpha/pharmacology*
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Humans
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Mice
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Umbilical Cord/cytology*
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Cells, Cultured
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Apoptosis
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Male
2.Regulatory Effects of Cytokines on Spontaneous Pyroptosis in Neutrophils.
Tong CHEN ; Qian REN ; Feng-Xia MA
Acta Academiae Medicinae Sinicae 2025;47(4):497-508
Objective To explore the regulatory effects of cytokines interleukin(IL)-1β,IL-6,tumor necrosis factor alpha(TNF-ɑ),gamma interferon(IFN-γ),granulocyte colony-stimulating factor(G-CSF),and granulocyte-macrophage colony-stimulating factor(GM-CSF)on spontaneous pyroptosis in neutrophils.Methods Neutrophils isolated from mouse bone marrow by density-gradient centrifugation were cultured in vitro for 20 h with or without 10,50 or 100 ng/mL IL-1β,IL-6,IFN-γ,G-CSF or GM-CSF,or for 12 h with or without 1,10 or 50 ng/mL TNF-α.After incubation,cells were stained with annexin Ⅴ(AV)/propidium iodide(PI),and the proportions and absolute number of neutrophils undergoing different forms of cell death were determined by fluorescence microscopy combined with manual counting.Pyroptotic neutrophils were identified by cell morphology in conjunction with AV/PI staining.Flow cytometry with counting beads was employed to measure the proportions and number of AV/PI-stained Ly6g+neutrophils in different forms of cell death.Western blotting was employed to assess the cleavage and activation levels of cysteinyl aspartate-specific proteinase-3(caspase-3)and gasdermin E(GSDME).Results Treatment with IL-1β or IL-6 had no significant effect on the proportion or number of neutrophils undergoing spontaneous pyroptosis.After 12 h of treatment with TNF-α at 1,10,and 50 ng/mL,the proportions of pyroptotic neutrophils were(14.79±0.45)%,(19.99±3.02)%,and(20.66±1.99)%,respectively,higher than that[(10.22±1.12)%]in the untreated control(P=0.024,P<0.001,and P<0.001,respectively).Treatment with 10,50,and 100 ng/mL IFN-γ for 20 h reduced the proportion of pyroptotic neutrophils from(17.43±1.88)%to 12.00%(all P<0.001).G-CSF at 10,50,and 100 ng/mL reduced the proportion of pyroptotic cells to around 6.00%and greatly inhibited the cleavage of both caspase-3 and GSDME.After 20 h of treatment with 10,50,and 100 ng/mL GM-CSF,the proportions of pyroptotic neutrophils decreased to(7.52±0.53)%,(5.27±2.30)%,and(0.64±1.11)%,respectively.Conclusions Neither IL-1β nor IL-6 affects GSDME-mediated spontaneous pyroptosis in neutrophils.TNF-ɑ induces spontaneous pyroptosis in neutrophils,whereas IFN-γ,G-CSF,and GM-CSF demonstrate inhibitory effects.
Pyroptosis/drug effects*
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Animals
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Neutrophils/cytology*
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Mice
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Cytokines/pharmacology*
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Interleukin-1beta/pharmacology*
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Granulocyte-Macrophage Colony-Stimulating Factor/pharmacology*
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Cells, Cultured
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Granulocyte Colony-Stimulating Factor/pharmacology*
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Tumor Necrosis Factor-alpha/pharmacology*
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Interferon-gamma/pharmacology*
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Interleukin-6/pharmacology*
3.Dermatophagoides farinae induces conjunctival epithelial cell damage to promote neutrophil migration and neutrophil extracellular traps formation.
Meili WU ; Ru YAN ; Wenjun ZHAO
Chinese Journal of Schistosomiasis Control 2023;35(3):271-278
OBJECTIVE:
To investigate the mechanisms underlying allergic conjunctivitis caused by conjunctival epithelial cell damage, neutrophil migration and neutrophil extracellular traps (NETs) formation induced by crude extracts of Dermatophagoides farinae mite (CDM).
METHODS:
Human conjunctival epithelial cells were stimulated with 500, 1 000, 2 000, 4 000 ng/mL, and the expression levels of interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), interferon-γ (IFN-γ) and IL-8 were detected using quantitative real-time PCR (qPCR) assay and enzyme-linked immunosorbent assay (ELISA). The culture supernatant of human conjunctival epithelial cells was collected and co-cultured with neutrophils. Neutrophil migration was measured using Transwell migration assay, and the expression of NETs markers myeloperoxidase (MPO) and citrullinated histone H3 (CitH3) was quantified using immunofluorescence staining. Neutrophils were stimulated with phorbol 12-myristate 13-acetate (PMA), and then NETs were collected for treatment of human conjunctival epithelial cells. Cell apoptosis was detected using flow cytometry, and the levels of IL-6, TNF-α, IFN-γ and IL-8 were measured in the cell culture supernatant using ELISA.
RESULTS:
Treatment with CDM at concentrations of 2 000 ng/mL and 4 000 ng/mL up-regulated IL-6, TNF-α, IFN-γ and IL-8 expression in human conjunctival epithelial cells. Following treatment with CDM at concentrations of 2 000 ng/mL and 4 000 ng/mL, the culture supernatant of human conjunctival epithelial cells promoted neutrophil migration and induced increases in the staining intensity of MPO and CitH3. In addition, increased NETs triggered the apoptosis of human conjunctival epithelial cells and IL-6, TNF-α, IFN-γ and IL-8 secretion in the culture supernatant of human conjunctival epithelial cells.
CONCLUSIONS
CDM induces human conjunctival epithelial cell damages, thereby promoting neutrophil migration and NETs formation, while the release of NETs further aggravates human conjunctival epithelial cell damages.
Animals
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Humans
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Extracellular Traps
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Neutrophils
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Interleukin-8/metabolism*
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Dermatophagoides farinae
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Interleukin-6/metabolism*
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Tumor Necrosis Factor-alpha/metabolism*
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Epithelial Cells
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Interferon-gamma/metabolism*
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Tetradecanoylphorbol Acetate/pharmacology*
4.Action Mechanism of Ethambutol Tablets on Pulmonary Tuberculosis Rat Model Based on Janus Kinase/Signal Transducer and Activator of Transcription Signaling Pathway.
Jian-Jun LI ; Su-Fang WU ; Feng-Xi BAI
Acta Academiae Medicinae Sinicae 2022;44(4):555-562
Objective To explore the therapeutic effect of ethambutol tablets (EMB) on pulmonary tuberculosis (PTB) in rats and whether the action mechanism of EMB is related to Janus kinase (JAK)/signal transducer and activator of transcription (STAT) signaling pathway. Methods Sixty SD rats were assigned into a control group,a PTB group,a PTB+EMB group (30 mg/kg),and a PTB+EMB+Colivelin (JAK/STAT pathway activator) group (30 mg/kg+1 mg/kg) via the random number table method,with 15 rats in each group.The rats in other groups except the control group were injected with 0.2 ml of 5 mg/ml Mycobacterium tuberculosis suspension to establish the PTB model.After the modeling,the rats were administrated with corresponding drugs for 4 consecutive weeks (once a day).On days 1,14,and 28 of administration,the body weights of rats were measured and the Mycobacterium tuberculosis colonies were counted.Hematoxylin-eosin staining was carried out to detect the pathological changes in the lung tissue.Enzyme-linked immunosorbent assay was employed to measure the levels of interleukin(IL)-6,tumor necrosis factor-α (TNF-α),IL-1β,and interferon-γ (IFN-γ) in the serum.Flow cytometry was used to determine the levels of T lymphocyte subsets CD3+,CD4+,CD8+,and CD4+/CD8+.The 16S rRNA sequencing was performed to detect the relative abundance of the intestinal microorganisms.Western blotting was employed to determine the expression of the proteins in the JAK/STAT pathway. Results Compared with the control group,the modeling of PTB reduced the rat body weight (on days 14 and 28),increased Mycobacterium tuberculosis colonies,caused severe pathological changes in the lung tissue,and elevated the levels of IL-6,TNF-α,and IL-1β in serum and CD8+.Moreover,the modeling increased the relative abundance of Bacteroides,Peptococcus,Clostridium,Actinomyces,Lactobacillus,Verrucomicrobium,and Veillonella in the intestine,up-regulated the protein levels of phosphorylated JAK2 and phosphorylated STAT3 in the lung tissue,and lowered the levels of CD3+,CD4+,CD4+/CD8+,and IFN-γ levels (all P<0.001).Compared with the PTB group,PTB+EMB increased the rat body weight (on days 14 and 28),reduced Mycobacterium tuberculosis colonies,alleviated the pathological damage in lung tissue,lowered the levels of IL-6,TNF-α,and IL-1β in serum and CD8+.Moreover,the treatment decreased the relative abundance of Bacteroides,Peptococcus,Clostridium,Actinomyces,Lactobacillus,Verrucomicrobium,Veillonella in the intestine,down-regulated the protein levels of phosphorylated JAK2 and phosphorylated STAT3 in the lung tissue,and elevated the levels of CD3+,CD4+,CD4+/CD8+,and IFN-γ (all P<0.001).Colivelin weakened the alleviation effect of EMB on PTB (all P<0.001). Conclusion EMB can inhibit the JAK/STAT signaling pathway to alleviate the PTB in rat.
Animals
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Body Weight
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Ethambutol/pharmacology*
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Interferon-gamma/pharmacology*
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Interleukin-6/metabolism*
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Janus Kinases/pharmacology*
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Mycobacterium tuberculosis/metabolism*
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RNA, Ribosomal, 16S
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Rats
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Rats, Sprague-Dawley
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STAT Transcription Factors/pharmacology*
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Signal Transduction
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Tablets/pharmacology*
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Tuberculosis, Pulmonary/metabolism*
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Tumor Necrosis Factor-alpha/metabolism*
5.Site-specific monoPEGylated interferon alpha2a mediated by microbial transglutaminase.
Xiwu HUI ; Weirong CAO ; Di ZHANG ; Wenli GE ; Shuli LI ; Yingui LI
Chinese Journal of Biotechnology 2020;36(4):750-762
PEGylation is considered one of the most successful techniques to improve the characteristics of protein drugs including to increase the circulating half-life of proteins in blood and to decrease their immunogenicity and antigenicity. One known PEG modification method is to attach PEG to the free amino group, typically at lysine residues or at the N-terminal amino acid with no selectivity, resulting in a heterogeneous product mixture. This lack of selectivity can present problems when a therapeutic PEGylated protein is being developed, because predictability of activity and manufacturing reproducibility are needed for regulatory approval. Enzymatic PEGylation of proteins is one route to overcome this limitation. Transglutaminases (TGase) are enzyme candidates for site-specific PEGylation. We use human interferon alpha 2a (IFN α2a) as a test case, and predict that the potential modification residues are Gln101 by computational approach as it contains 12 potential PEGylation sites. IFN α2a was PEGylated by Y shaped PEG40k-NH2 mediated by microbial transglutaminase. Our results show that the microbial transglutaminase mediated PEGylation of IFN α2a was site-specific only at the site of Gln101 in IFN α2a, yielding the single mono-conjugate PEG-Gln101-IFN α2a with a mass of 59 374.66 Da. Circular dichroism studies showed that PEG-Gln101-IFN α2a preserved the same secondary structures as native IFN α2a. As expected, the bioactivity and pharmacokinetic profile in rats of PEG-Gln101-IFN α2a revealed a significant improvement to unmodified IFN α2a, and better than PEGASYS.
Animals
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Antiviral Agents
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Humans
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Interferon alpha-2
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metabolism
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Interferon-alpha
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biosynthesis
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pharmacokinetics
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Polyethylene Glycols
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pharmacokinetics
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Protein Structure, Secondary
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Rats
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Recombinant Proteins
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biosynthesis
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pharmacokinetics
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pharmacology
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Reproducibility of Results
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Transglutaminases
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metabolism
6.Interferon-α2b spray inhalation did not shorten virus shedding time of SARS-CoV-2 in hospitalized patients: a preliminary matched case-control study.
Shao-Rui HAO ; Ren YAN ; Shan-Yan ZHANG ; Jiang-Shan LIAN ; Huan CAI ; Xiao-Li ZHANG ; Lin ZHENG ; Hong-Yu JIA ; Jian-Hua HU ; Guo-Dong YU ; Jue-Qing GU ; Chan-Yuan YE ; Ci-Liang JIN ; Ying-Feng LU ; Jiao-Jiao XIN ; Ji-Fang SHENG ; Yi-Da YANG
Journal of Zhejiang University. Science. B 2020;21(8):628-636
BACKGROUND:
Currently, there are no drugs that have been proven to be effective against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Because of its broad antiviral activity, interferon (IFN) should be evaluated as a potential therapeutic agent for treatment of coronavirus disease 2019 (COVID-19), especially while COVID-19-specific therapies are still under development.
METHODS:
Confirmed COVID-19 patients hospitalized in the First Affiliated Hospital, School of Medicine, Zhejiang University in Hangzhou, China, from January 19 to February 19, 2020 were enrolled in a retrospective study. The patients were separated into an IFN group and a control group according to whether they received initial IFN-α2b inhalation treatment after admission. Propensity-score matching was used to balance the confounding factors.
RESULTS:
A total of 104 confirmed COVID-19 patients, 68 in the IFN group and 36 in the control group, were enrolled. Less hypertension (27.9% vs. 55.6%, P=0.006), dyspnea (8.8% vs. 25.0%, P=0.025), or diarrhea (4.4% vs. 19.4%, P=0.030) was observed in the IFN group. Lower levels of albumin and C-reactive protein and higher level of sodium were observed in the IFN group. Glucocorticoid dosage was lower in the IFN group (median, 40 vs. 80 mg/d, P=0.025). Compared to the control group, fewer patients in the IFN group were ventilated (13.2% vs. 33.3%, P=0.015) and admitted to intensive care unit (ICU) (16.2% vs. 44.4%, P=0.002). There were also fewer critical patients in the IFN group (7.4% vs. 25.0%, P=0.017) upon admission. Although complications during admission process were comparable between groups, the discharge rate (85.3% vs. 66.7%, P=0.027) was higher and the hospitalization time (16 vs. 21 d, P=0.015) was shorter in the IFN group. When other confounding factors were not considered, virus shedding time (10 vs. 13 d, P=0.014) was also shorter in the IFN group. However, when the influence of other factors was eliminated using propensity score matching, virus shedding time was not significantly shorter than that of the control group (12 vs. 15 d, P=0.206).
CONCLUSIONS
IFN-α2b spray inhalation did not shorten virus shedding time of SARS-CoV-2 in hospitalized patients.
Albumins/analysis*
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Antiviral Agents/administration & dosage*
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Betacoronavirus
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C-Reactive Protein/analysis*
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COVID-19
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Case-Control Studies
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China
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Coronavirus Infections/drug therapy*
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Glucocorticoids/pharmacology*
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Hospitalization
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Humans
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Interferon alpha-2/administration & dosage*
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Nasal Sprays
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Pandemics
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Pneumonia, Viral/drug therapy*
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Propensity Score
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Retrospective Studies
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SARS-CoV-2
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Sodium/blood*
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Virus Shedding/drug effects*
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COVID-19 Drug Treatment
7.Characteristics of lymphocyte phenotypes in HBV transgenic mice and the effect of interferon-α: a preliminary study.
Xin YAN ; Rui-Hua ZHONG ; Jin-Hong LIU ; Yang ZHOU ; Li-Bo TANG ; Yong-Yin LI ; Guang-Ze LIU ; Jin-Lin HOU
Journal of Southern Medical University 2016;36(6):870-874
OBJECTIVETo analyze the characteristics of lymphocyte phenotypes in hepatitis B virus (HBV) transgenic mice and the effect of exogenous interferon-α on virological profiles and lymphocytes phenotypes of the mice.
METHODSHBV transgenic mice and wild-type (WT) mice were examined for serum levels of HBsAg, HBcAb, IL-21, and IL-6 using ELISA. The frequencies of CD4(+)T and CD19(+)B cells separated from the liver, spleen, and peripheral blood were detected by flow cytometry. Nine HBV transgenic mice were injected subcutaneously with recombinant mouse interferon alpha (rmIFN-α) and another 9 transgenic mice were injected with PBS, and their HBsAg, HBV DNA, IL-6, and IL-21 levels and frequencies of peripheral blood CD4(+)T and CD19(+)B cells were detected.
RESULTSHBV transgenic mice showed a high level of HBsAg with a detectable level of HBcAb and significantly increased serum levels of IL-21 and IL-6 as compared with WT mice (P<0.05). The transgenic mice had a significantly lower frequency of CD4(+) T cells in the peripheral blood, liver and spleen (P<0.05) but a significantly higher frequency of CD19(+) B cells in the liver (P<0.05). An inverse correlation between intrahepatic CD4(+) T cell frequency and serum HBsAg level while a positive correlation between intrahepatic CD19(+) B cell frequency and HBcAb level were found in HBV transgenic mice. Administration of rmIFN-α significantly increased the frequencies of CD4(+) T and CD19(+) B cells in the peripheral blood and the serum level of IL-6 in HBV transgenic mice (P<0.05).
CONCLUSIONHBV transgenic mice have lymphocyte subset dysregulation and exogenous interferon-α can modulate the immune function of the mice by regulating the frequencies of lymphocyte subsets.
Animals ; Antiviral Agents ; pharmacology ; B-Lymphocytes ; drug effects ; DNA, Viral ; blood ; Hepatitis B ; drug therapy ; immunology ; Hepatitis B Antibodies ; blood ; Hepatitis B Surface Antigens ; blood ; Hepatitis B virus ; Interferon-alpha ; pharmacology ; Interleukin-6 ; blood ; Interleukins ; blood ; Liver ; immunology ; Lymphocyte Subsets ; cytology ; drug effects ; Mice ; Mice, Transgenic ; Phenotype ; T-Lymphocytes ; drug effects
8.Comparison of Several Optimization Schemes for the Induction and Expansion of Antibody-Mediated High Efficiency CIK (AMHE-CIK) In Vitro.
Xue YIN ; Xin XU ; Yao ZHAO ; Zhan-Ju WANG ; Hai-Ying WANG ; Zhen-Bo HU
Journal of Experimental Hematology 2016;24(1):191-196
OBJECTIVETo compare several schemes of inducing and expanding the antibody-mediated high efficiency CIK (AMHE-CIK) in vitro, so as to find out a method that can acquire a large number of cells capable to kill the tumor cells in a short time.
METHODSPeripheral blood mononuclear cells (PBMNC) from healthy volunteers was isolated and activated with CD3 antibody, then were cultured with the addition of different cytokines (IL-2, IL-4, G-CSF, GM-CSF, IFN-γ, TNF-α) for 14 days in vitro. The morphological changes of cells were observed by light microscopy. Based on the immunophenotypes of cells in each groups analyzed by flow cytometry, the cytokines capable to induce the dendritic cells and killer cells were screened out, respectively. According to different combination of cytokines, the cells were divided 4 groups: control, IL-2, group 1 (componant A included IL-2, IL-4, and GM-CSF. Componant B included IL-2, G-CSF, IFN-γ, and TNF-α), and group 2 (componant A included IL-2, IL-4, and GM-CSF. Componant B included IL-2, IL-4, G-CSF, IFN-γ, and TNF-α). The proliferation and differentiation of CD3(+) CD8(+) and CD3(+) CD56(+) cells were measured by flow cytometry after culture in vitro for 7 days.
RESULTSAfter inducing and expanding in vitro for 7 days, the cell proliferation rate of control group, IL-2 group, group 1 and group 2 were 1.57 ± 0.01, 4.17 ± 0.16, 5 ± 0.47, 7.17 ± 0.24-folds, respectively. The differences between IL-2 group, group 1, group 2 and control group were statistically significant (P < 0.05). The immunophenotype analysis showed that the proportion of CD3(+) CD8(+) induced by each protocol was 13.96 ± 0.23%, 26.33 ± 0.55%, 36.83 ± 0.34% and 35.88 ± 0.16%, respectively. The proportion of CD3(+) CD8(+) in group 1 and 2 was higher than that in IL-2 group (P < 0.05), but the difference between them was not significant (P < 0.05). The proportions of CD3(+) CD56(+) induced by each protocol were 11.03 ± 0.28%, 29.31 ± 0.60%, 39.96 ± 0.38% and 29.33 ± 0.54%, respectively, the proportion of group 1 was higher than that of IL-2 group and group 2 (P < 0.05), but the difference between IL-2 group and group 2 was not significant (P < 0.05).
CONCLUSIONThe group 1 protocol obtained from this study can promote the proliferation of DC-CIK and also increase the proportion of the tumor killing cells (CD3(+) CD8(+) and CD3(+) CD56(+)).
Cell Culture Techniques ; Cells, Cultured ; Culture Media ; chemistry ; Cytokine-Induced Killer Cells ; cytology ; Granulocyte Colony-Stimulating Factor ; pharmacology ; Granulocyte-Macrophage Colony-Stimulating Factor ; pharmacology ; Humans ; Immunophenotyping ; Interferon-gamma ; pharmacology ; Interleukin-2 ; pharmacology ; Interleukin-4 ; pharmacology ; Tumor Necrosis Factor-alpha ; pharmacology
9.Intragastric administration of interferon-α-transformed Bifidobacterium promotes lymphocyte proliferation and maturation in mice.
Weisen ZENG ; Shuxian ZHANG ; Congwen SHAO ; Yuanjian HUANG ; Wenying LIANG ; Mingyue ZHENG
Journal of Southern Medical University 2015;35(3):326-332
OBJECTIVETo investigate the effects of intragastric administration of human interferon-α (hIFN-α)-transformed Bifidobacterium on immune functions of mice.
METHODSThe E.coli-Bifidobacterium shuttle expression vector containing hIFN-α gene was constructed and transformed into Bifidobacterium. The hIFN-α-transformed Bifidobacterium suspension (1010 /ml) was prepared after induction with 0.2% L-arabinose for hIFN-α expression and administered intragastrically in male Balb/C mice at the dose of 0.1 ml every other day for 2 weeks, with the mice receiving empty vector-transformed Bifidobacteria as the negative control and those having an equal volume of saline as the blank control. The percentages of mononuclear cell subsets in the thymus, spleen and blood were detected in the mice by flow cytometry, and the serum levels of IL-4, IL-12, IFN-γ and TNF-α were assayed using mouse cytokine FlowCytomix Kit.
RESULTSThe percentages of CD3⁺CD8⁺ and CD4⁺CD8⁺ cells in the thymus, CD3⁺CD4⁺, CD3⁺CD8⁺ and CD4⁺CD8⁺ cells in the spleen, and CD3⁺CD8⁺ cells in the blood all increased significantly in IFN group as compared with those in the negative and blank control groups (P<0.01 or 0.05). The serum level of IFN-γ also increased significantly (P<0.05) while IL-4 level remained unchanged in IFN group compared with those in the two groups.
CONCLUSIONIntragastric administration of hIFN-α-transformed Bifidobacterium promotes lymphocyte proliferation and maturation and increases the serum levels of Th1 cytokines in mice.
Animals ; Bifidobacterium ; Cell Proliferation ; Genetic Vectors ; Humans ; Interferon-alpha ; pharmacology ; Interferon-gamma ; blood ; Interleukin-12 ; blood ; Interleukin-4 ; blood ; Lymphocyte Activation ; drug effects ; Male ; Mice ; Mice, Inbred BALB C ; Recombinant Proteins ; pharmacology ; Spleen ; cytology ; Th1 Cells ; cytology ; Thymus Gland ; cytology ; Tumor Necrosis Factor-alpha ; blood
10.The effects of Shadu Cao Mixture on immune functions of immunosuppression mice.
Shun-fei LU ; Liang-liang WANG ; Jun-wan LU ; Bing-jin LIU ; Ying-peng TONG ; Xiao-dong CHENG ; Ting-mei YE
Chinese Journal of Applied Physiology 2015;31(3):266-269
OBJECTIVETo investigate the effects of Shadu Cao Mixture (SDCM, traditional Chinese medicine) on immune functions of immunosuppression mice.
METHODSFifty BALB/C mice were randomly divided into blank control group, model group, SDCM low-dose, middle-dose and high-dose group. Except the blank control group, other groups were intraperitoneal injected with cyclophosphamide (40 mg/kg) to establish immunosuppression mice model. The blank control group and model group received gavage administration with nonnal saline, while the other groups received gavage administration with different doses of SDCM (10, 20, 40 m/kg for 15 days) respectively. The number of leukocytes and serum levels of interleukin-2 (IL-2), tumor necrosis factor-α (TNF-α) and interferon-γ (IFN-γ) in peripheral blood, spleen index, and the function of NK cells were measured.
RESULTSCompared with the model group , SDCM increased the number of leukocytes and serum concentrations of IL-2, TNF-α and IFN-γ in peripheral blood and improved the spleen index and the function of NK cells significantly (P < 0.05-0.01).
CONCLUSIONSDCM could remarkably enhance the immune functions of immunosuppression mice induced by cyclophosphamide.
Animals ; Cyclophosphamide ; Disease Models, Animal ; Drugs, Chinese Herbal ; pharmacology ; Immunosuppression ; Interferon-gamma ; blood ; Interleukin-2 ; blood ; Killer Cells, Natural ; immunology ; Mice ; Mice, Inbred BALB C ; Spleen ; immunology ; Tumor Necrosis Factor-alpha ; blood

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