In vitro effect of ochratoxin A and deoxynivalenol on the expression of interleukin 5 and interferon-gamma in broiler chicken lymphocytes

2016 ◽  
Vol 9 (2) ◽  
pp. 299-304 ◽  
Author(s):  
C. Lautert ◽  
L. Ferreiro ◽  
M.I. Azevedo ◽  
S.A. Botton ◽  
J.T. Santos ◽  
...  
Keyword(s):  
Ochratoxin A ◽  
Interferon Gamma ◽  
Broiler Chickens ◽  
Broiler Chicken ◽  
Fungal Metabolites ◽  
Interleukin 5 ◽  
T Helper 2 ◽  
Ifn Γ ◽  
Vitro Effect

Cytokines are proteins secreted by cells of innate and acquired immunity, produced in response to various antigens and responsible for mediating several function of these cells. Our study evaluated the profile of cytokines interleukin 5 (IL-5) and interferon gamma (IFN-γ), induced in lymphocytes of broiler chickens in response to secondary fungal metabolites ochratoxin A (OTA) and deoxynivalenol (DON) at concentrations of 0.001, 0.01, 0.1 and 1 μg/ml. The quantification of the cytokines was analysed at 24, 48 and 72 h after incubation with mycotoxins, using real-time PCR (qRT-PCR). The results obtained showed that OTA induced mRNA synthesis of IL-5 at concentrations 0.001, 0.1 and 1 μg/ml after 24 h of lymphocyte incubation, while at 48 h only the expression of the IL-5 cytokine at a concentration of 1 μg/ml (P<0.05) was detected. DON in a concentration of 1 μg/ml induced the expression of IL-5 in the lymphocytes only at 48 h post-incubation period (P<0.05). Regarding IFN-γ, gene expression was not observed in the lymphocytes of broiler chickens incubated with OTA and DON. The data obtained represent a profile of response mediated by T helper 2 cells to the exposure of broiler chicken immune cells to different concentrations of OTA and DON.

Interferon resistance of cutaneous T-cell lymphoma–derived clonal T-helper 2 cells allows selective viral replication

Blood ◽  
2001 ◽  
Vol 97 (2) ◽  
pp. 523-527 ◽  
Author(s):  
Reinhard Dummer ◽  
Udo Döbbeling ◽  
Ralf Geertsen ◽  
Jörg Willers ◽  
Günter Burg ◽  
...  
Keyword(s):  
T Cell ◽  
Viral Replication ◽  
Human Leukocyte ◽  
T Helper ◽  
Cd4 Cells ◽  
Efficient Treatment ◽  
T Helper 2 ◽  
Ifn Γ ◽  
The Impact

Abstract Cutaneous T-cell lymphomas (CTCL) comprise a heterogeneous group of lymphoproliferative disorders that are characterized by an accumulation of T-lymphocytes in the skin and occasionally in blood known as Sézary syndrome (SS). In most cases the dominant clone displays T-helper 2 cytokines. Because IFN-γ is a natural inhibitor of T-helper 2 cells and IFN-α is frequently used in CTCL, the impact of IFNs on SS-derived purified clonal T-helper 2 cells was studied using anti-Vβ antibodies. Moreover, IFNs are known to mediate virus resistance in normal cells. The isolated clonal CD4+ cells, but not the nonclonal CD4+ cells, appeared resistant to IFN-γ and IFN-α stimulation in terms of human leukocyte antigen up-regulation and MxA induction caused in part by alterations in Stat-1 molecule mRNA and IFNγR1 mRNA transcription. The IFN resistance of the patient-derived clonal cells was then targeted by vesicular stomatitis virus infection after IFN-α priming, resulting in selective viral replication in clonal cells. In contrast, nonclonal cells of the same patient showed IFN-dependent MxA expression, which is a major mediator protein of viral protection. The IFN resistance of the dominant T-helper 2 cells might be important for lymphomagenesis. Interferon signaling deficiencies can be targeted for purging patients' cells in vitro. Furthermore, this approach may allow specific molecular interventions, resulting in the efficient treatment of CTCL and other IFN-resistant neoplasms such as lung cancer.

scholarly journals PERCENTAGE OF CD3+ T LYMPHOCYTES EXPRESSING IFN-γ AFTER CFP-10 STIMULATION (Persentase Limfosit T-CD3+ yang Mengekspresikan Interferon Gamma Setelah Stimulasi Antigen CFP-10)

2018 ◽  
Vol 23 (1) ◽  
pp. 31
Author(s):  
Yulia Nadar Indrasari ◽  
Betty Agustina Tambunan ◽  
Jusak Nugraha ◽  
Fransiska Sri Oetami
Keyword(s):  
Flow Cytometry ◽  
Mycobacterium Tuberculosis ◽  
T Lymphocytes ◽  
Interferon Gamma ◽  
Tuberculosis Antigen ◽  
Mycobacterium Tuberculosis Antigen ◽  
Ifn Γ

Tuberkulosis (TB) merupakan penyakit infeksi menular, disebabkan oleh Mycobacterium tuberculosis. Respons imun adaptif yangdiperantarai oleh limfosit T berperan sangat penting dalam menyingkirkan bakteri intraseluler. Hasilan sitokin IFN-γ merupakanmekanisme efektor utama dari limfosit T. Pengembangan vaksin yang efektif dalam melawan infeksi TB mempertimbangkan faktor yangmengatur hasilan IFN-γ. CFP-10 merupakan antigen yang disekresikan oleh Mycobacterium tuberculosis. Antigen ini dikenal sebagaikomponen vaksin potensial untuk TB. Tujuan penelitian ini adalah membandingkan respons imun seluler yaitu persentase limfosit T-CD3+yang mengekspresikan IFN-γ setelah dirangsang antigen CFP-10 di pasien TB paru kasus baru, TB laten dan orang sehat. Penelitianini menggunakan desain eksperimen murni di laboratorium secara in vitro pada kultur PBMC pasien TB paru kasus baru, TB latendan orang sehat. Subjek penelitian adalah 8 pasien TB paru kasus baru, 7 TB laten dan 7 orang sehat di RS Khusus Paru Surabaya.Pemeriksaan persentase limfosit T-CD3+ yang mengekspresikan IFN-γ dengan metode Flow cytometry (BD FACSCalibur). Hasil dianalisisdengan Kruskal-Wallis atau ANOVA satu arah. Rerata persentase limfosit T-CD3+ yang mengekspresikan IFN-γ di TB paru kasus barusetelah stimulasi antigen CFP-10 (4,36%) lebih tinggi daripada sebelum stimulasi (3,50%) (nilai P=0,015). Rerata persentase limfositT-CD3+ yang mengekspresikan IFN-γ di TB laten setelah stimulasi antigen CFP-10 (3,96%) lebih tinggi dibandingkan sebelum stimulasi(2,50%) tetapi tidak bermakna (nilai P=0,367). Rerata persentase limfosit T- CD3+ yang mengekspresikan IFN-γ di orang sehat setelahstimulasi (1,66%) lebih rendah daripada sebelum stimulasi (2,89%) tetapi tidak bermakna (nilai P=0,199). Perubahan persentaselimfosit T-CD3+ yang mengekspresikan IFN-γ setelah stimulasi antigen CFP-10 antarkelompok tidak berbeda bermakna (nilai P=0,143).Berdasarkan hasil telitian ini dapat disimpulkan bahwa terdapat peningkatan persentase limfosit T-CD3+ yang mengekspresikan IFN-γdi TB paru kasus baru setelah stimulasi antigen CFP-10. Hal ini menunjukkan limfosit T-CD3+ yang mengekspresikan IFN-γ berperandalam perlindungan terhadap infeksi TB paru.

scholarly journals Interferon-gamma improves splicing efficiency of CYBB gene transcripts in an interferon-responsive variant of chronic granulomatous disease due to a splice site consensus region mutation

Blood ◽  
2000 ◽  
Vol 95 (11) ◽  
pp. 3548-3554 ◽  
Author(s):  
Antonio Condino-Neto ◽  
Peter E. Newburger
Keyword(s):  
B Cell ◽  
Chronic Granulomatous Disease ◽  
Cell Line ◽  
Interferon Gamma ◽  
Granulomatous Disease ◽  
First Intron ◽  
Cybb Gene ◽  
Nuclear Rna ◽  
Ifn Γ

Abstract X-linked chronic granulomatous disease (CGD) derives from defects in the CYBB gene, which encodes the gp91-phox component of NADPH oxidase. We studied the molecular basis of the disease in a kindred with variant CGD, due to a single base substitution at the sixth position of CYBB first intron. The patients' phagocytes have been shown previously to greatly increase superoxide release in response to interferon-gamma (IFN-γ) in vitro and in vivo. We examined CYBB gene expression in an Epstein-Barr virus (EBV)-transformed B-cell line from 1 patient in this kindred. These cells showed markedly decreased levels of CYBB transcripts in total RNA (5% of normal) and nuclear RNA (1.4% of normal), despite equal CYBB transcription rates in the CGD and control cells. Incubation with IFN-γ produced a 3-fold increase in CYBBtotal messenger RNA (mRNA) levels in the patient's cells, and decreased nuclear transcripts to undetectable levels. Reverse transcriptase–polymerase chain reaction analysis of RNA splicing revealed a preponderance of unspliced CYBB transcripts in the patient's nuclear RNA. In vitro incubation with IFN-γ increased by 40% the ratio of spliced relative to unspliced CYBB mRNA in nuclei from the CGD B-cell line. Total RNA harvested from the same patient's monocytes, on and off therapy with IFN-γ, showed a similar improvement in splicing. We conclude that IFN-γ partially corrects a nuclear processing defect due to the intronic mutation in theCYBB gene in this kindred, most likely by augmentation of nuclear export of normal transcripts, and improvement in the fidelity of splicing at the first intron.

scholarly journals Protein and energy relationships in the broiler chicken

1993 ◽  
Vol 70 (3) ◽  
pp. 667-678 ◽  
Author(s):  
R. W. Rosebrough ◽  
J. P. McMurtry
Keyword(s):  
Broiler Chickens ◽  
Crude Protein ◽  
Broiler Chicken ◽  
Protein Levels ◽  
Low Protein ◽  
Dietary Crude Protein ◽  
Energy Relationships ◽  
Limiting Amino Acid ◽  
Limiting Amino Acids

Male broiler chickens growing from 7 to 35d were fed on a diet containing 150g crude protein (N × 6·25)/kg diet supplemented with lysine to equal that in diets containing 166, 183 and 200g crude protein/kg diet (Expt 1). A second group of male broiler chickens growing over the same period were fed on a diet containing 120g crude protein/kg supplemented with lysine, arginine, tryptophan, threonine and isoleucine equal to that in diets containing 144, 172 and 200g crude protein/kg diet (Expt 2). Growth was improved by lysine supplementation but not to the level attained by feeding 200g crude protein/kg (Expt 1). Lysine, arginine, tryptophan, threonine and isoleucine supplementation of a low-protein diet also improved growth, but growth again fell short of that attained by feeding a diet containing 200g crude protein/kg. Plasma insulin-like growth factor-1 and thyroxine concentrations increased and triiodothyronine decreased as the crude protein level increased from 150 to 200g/kg diet. Supplemental lysine did not affect plasma levels of these hormones. Although dietary crude protein levels noticeably changed rates ofin vitrolipogenesis, changing either the level of a single limiting amino acid or the levels of several limiting amino acids did not change lipogenesis.

scholarly journals TIM-3 Expression Is Downregulated on Human NK Cells in Response to Cancer Targets in Synergy with Activation

Cancers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2417 ◽  
Author(s):  
Tram N. Dao ◽  
Sagar Utturkar ◽  
Nadia Atallah Lanman ◽  
Sandro Matosevic
Keyword(s):  
T Cell ◽  
Nk Cells ◽  
Natural Killer ◽  
Interferon Gamma ◽  
Nk Cell ◽  
Ex Vivo ◽  
Cell Dysfunction ◽  
Nk Cell Receptors ◽  
Ifn Γ

Among natural killer (NK) cell receptors, the T-cell immunoglobulin and mucin-containing domain (TIM-3) has been associated with both inhibitory and activating functions, depending on context and activation pathway. Ex vivo and in vitro, expression of TIM-3 is inducible and depends on activation stimulus. Here, we report that TIM-3 expression can be downregulated on NK cells under specific conditions. When NK cells are exposed to cancer targets, they synergize with stimulation conditions to induce a substantial decrease in TIM-3 expression on their surface. We found that such downregulation occurs following prior NK activation. Downregulated TIM-3 expression correlated to lower cytotoxicity and lower interferon gamma (IFN-γ) expression, fueling the notion that TIM-3 might function as a benchmark for human NK cell dysfunction.

Killing of schistosomula of Schistosoma mansoni by macrophages: induction by T-cell clone-derived lymphokines and interferon-gamma

Parasitology ◽  
1986 ◽  
Vol 92 (2) ◽  
pp. 325-336 ◽  
Author(s):  
C. F. Kubelka ◽  
A. Ruppel ◽  
P. H. Krammer ◽  
D. Gemsa
Keyword(s):  
T Cell ◽  
Interferon Gamma ◽  
Macrophage Activation ◽  
Cell Clone ◽  
T Cell Clones ◽  
Cell Clones ◽  
T Cell Clone ◽  
Ifn Γ

SUMMARYThe induction of schistosomulicidal activity of peritoneal macrophages by concanavalin A-stimulated supernatants from long-term T-cell clones and by interferon-gamma (IFN-γ) was investigated in detail. Optimal conditions of in vitro macrophage activation by T-cell clone supernatants were established. Macrophages from 13-week S. mansoni-infected mice responded to lymphokine activation as well as resident mnacrophages from uninfecteci mice. IFN-γ was shown to play an essential role in induction of schistosomulicidal macrophage activity: recombinant IFN-γ at high concentration could induce schistosomula killing, and an anti-IFN-γ antiserum inhibited the induction ofschistosomulicidal activity by T-cell clone supernatants. Our data also indicate that macrophage activation could be obtained by IFN-γ in synergy with other lymphokines in the supernatant of long-term T-cell clones. Macrophages from mice injected with T-cell clone supernatants were primed in vivo and triggered to kill schistosomula in vitro in the presence of lipopolysaccharide (LPS). The data demonstrate that lymphokines produced by T-cell clones and, in particular, IFN-γ can participate in the activation of schistosomulicidal macrophages.

scholarly journals Dietary l-arginine inhibits intestinal Clostridium perfringens colonisation and attenuates intestinal mucosal injury in broiler chickens

2017 ◽  
Vol 118 (5) ◽  
pp. 321-332 ◽  
Author(s):  
Beibei Zhang ◽  
Zengpeng Lv ◽  
Huixian Li ◽  
Shuangshuang Guo ◽  
Dan Liu ◽  
...  
Keyword(s):  
Mrna Expression ◽  
Clostridium Perfringens ◽  
Broiler Chickens ◽  
Mucosal Injury ◽  
Intestinal Damage ◽  
Intestinal Mucosal Injury ◽  
Ifn Γ ◽  
Arginine Supplementation

AbstractWe investigated the effects of dietary l-arginine level and feeding duration on the intestinal damage of broilers induced by Clostridium perfringens (CP) in vivo, and the antimicrobial effect of its metabolite nitric oxide (NO) in vitro. The in vivo experiment was designed as a factorial arrangement of three dietary treatments×two challenge statuses. Broilers were fed a basal diet (CON) or a high-arginine diet (ARG) containing 1·87 % l-arginine, or CON for the first 8 d and ARG from days 9 to 28 (CON/ARG). Birds were co-infected with or without Eimeria and CP (EM/CP). EM/CP challenge led to intestinal injury, as evidenced by lower plasma d-xylose concentration (P<0·01), higher paracellular permeability in the ileum (P<0·05) and higher numbers of Escherichia coli (P<0·05) and CP (P<0·001) in caecal digesta; however, this situation could be alleviated by l-arginine supplementation (P<0·05). The intestinal claudin-1 and occludin mRNA expression levels were decreased (P<0·05) following EM/CP challenge; this was reversed by l-arginine supplementation (P<0·05). Moreover, EM/CP challenge up-regulated (P<0·05) claudin-2, interferon-γ (IFN-γ), toll-like receptor 2 and nucleotide-binding oligomerisation domain 1 (NOD1) mRNA expression, and l-arginine supplementation elevated (P<0·05) IFN-γ, IL-10 and NOD1 mRNA expression. In vitro study showed that NO had bacteriostatic activity against CP (P<0·001). In conclusion, l-arginine supplementation could inhibit CP overgrowth and alleviate intestinal mucosal injury by modulating innate immune responses, enhancing barrier function and producing NO.

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