scholarly journals CD69 Expression on CD4+ T Lymphocytes after In Vitro Stimulation with Tuberculin Is an Indicator of Immune Sensitization against Mycobacterium tuberculosis Antigens

2005 ◽  
Vol 12 (1) ◽  
pp. 101-106 ◽  
Author(s):  
Bojana Avgustin ◽  
Vladimir Kotnik ◽  
Mojca Škoberne ◽  
Tadej Malovrh ◽  
Aleksandra Skralovnik-Stern ◽  
...  
Keyword(s):  
Mycobacterium Tuberculosis ◽  
T Lymphocytes ◽  
Antigen Expression ◽  
Blast Transformation ◽  
Healthy Individuals ◽  
Purified Protein Derivative ◽  
Lymphocyte Blast Transformation ◽  
Cd69 Expression ◽  
Group B

ABSTRACT The expression of the CD69 antigen on CD4 T lymphocytes after in vitro stimulation with purified protein derivative (2 tuberculin units) was used to evaluate the tuberculin reactivities of 52 individuals from four experimental groups: Mycobacterium bovis BCG-vaccinated healthy individuals with a negative tuberculin skin test (TST) result (group A), BCG-vaccinated healthy individuals with a positive TST result (group B), patients with active tuberculosis (TB) before treatment (group C), and individuals with clinically inactive TB who had previously completed a prescribed course of chemotherapy (group D). The expression of CD69 on CD4 T lymphocytes was significantly higher in patients with active TB (16.2% ± 7.3%), individuals with clinically inactive TB (10.5% ± 7.4%), and healthy individuals with a positive TST result (15.5% ± 7.2%) than in healthy individuals with a negative TST result (3.8% ± 4.3%) (P < 0.005). We confirmed the correlation between CD69 antigen expression on T lymphocytes after stimulation with tuberculin and the TST induration diameter (Spearman rho = 0.783; P < 0.001), an assay for gamma interferon (the Quantiferon-TB assay; Spearman rho = 0.613; P < 0.001), and the lymphocyte BLAST transformation test (Spearman rho = 0.537; P < 0.001). Our results demonstrate the usefulness of the determination of CD69 on CD4 T lymphocytes after in vitro stimulation with tuberculin as a rapid indicator of immune sensitization against Mycobacterium tuberculosis.

scholarly journals Abnormal spontaneous interleukin 8 receptor expression: a brief report of two cases

2012 ◽  
Vol 45 (1) ◽  
pp. 134-137 ◽  
Author(s):  
Paulo Antas ◽  
Steven Holland ◽  
Timothy Sterling
Keyword(s):  
Mycobacterium Tuberculosis ◽  
T Lymphocytes ◽  
Ex Vivo ◽  
Receptor Expression ◽  
Interleukin 8 ◽  
Tuberculosis Infection ◽  
Mycobacterium Tuberculosis Infection ◽  
Purified Protein Derivative ◽  
Spontaneous Expression

Interleukin 8 (CXCL8) is an autocrine chemokine specific for the chemoattraction and activation of granulocytes, NKT cells and T lymphocytes. Patients with tuberculosis and latent Mycobacterium tuberculosis infection were assessed for the spontaneous expression of CXCR1 (CD128) and CXCR2 on lymphocytes and monocytes. Compared with ex vivo profiles, increased spontaneous CXCR2 expression and normal CXCR1 expression were found on lymphocytes in two out of 59 individuals. Monocytes showed normal ex vivo profiles for both receptors. After stimulation with purified protein derivative, the in vitro levels of CXCL8 were below the median levels of all patients with prior tuberculosis. Spontaneous CXCR2 modulation did not cause notable variation in the in vitro levels of CXCL8.

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 Immunomodulatory Activity and Phytochemical Profile of Infusions from Cleavers Herb

Molecules ◽  
2020 ◽  
Vol 25 (16) ◽  
pp. 3721 ◽  
Author(s):  
Tetiana Ilina ◽  
Weronika Skowrońska ◽  
Natalia Kashpur ◽  
Sebastian Granica ◽  
Agnieszka Bazylko ◽  
...  
Keyword(s):  
Skin Diseases ◽  
Herbal Remedy ◽  
Folk Medicine ◽  
Immunomodulatory Activity ◽  
Blast Transformation ◽  
Immunostimulatory Activity ◽  
Traditional Use ◽  
Aerial Parts ◽  
Lymphocyte Blast Transformation

Extracts from aerial parts of G. aparine (cleavers) constitute a herbal remedy with monography in British Herbal Pharmacopeia. On the European market, there are several drugs and food supplements consisting of Galium extracts. In folk medicine, cleavers was used topically in Europe, Asia, and the Americas to treat skin diseases. In several remedies, cleavers is also listed as an immunomodulatory active herb influencing the defense response of the human body. The aim of this study was to investigate the immunostimulatory activity and antioxidant potential in vitro of a raw infusion of cleavers and bioactive fractions. The functional activity of lymphocytes in the reaction of the lymphocyte blast transformation (RLBT) method was used for immunomodulatory activity assays and direct scavenging of 2,2-diphenyl-1-picrylhydrazyl (DPPH), nitric oxide (NO), and hydrogen peroxide (H2O2) was chosen for the examination of antioxidant activity. It was shown that both the raw extract and fractions show significant immunostimulatory and scavenging activities. The obtained data partially justify the traditional use of cleavers as topical remedy for skin infections and for wounds.

scholarly journals Investigation on the Effect of Immune Selection on Resistance to Bactericidal Antibodies to Group B Meningococci In Vitro

2009 ◽  
Vol 16 (11) ◽  
pp. 1693-1695 ◽  
Author(s):  
George F. Santos ◽  
Marzia Giuliani ◽  
Laura Santini ◽  
Jeanette Adu-Bobie ◽  
Mariagrazia Pizza ◽  
...  
Keyword(s):  
Selective Pressure ◽  
Antigen Expression ◽  
Immune Selection ◽  
Meningococcal Group ◽  
Bactericidal Antibody ◽  
Antibody Titers ◽  
Induction Of Resistance ◽  
Group B ◽  
Selection Event

ABSTRACT The induction of resistance by immune selective pressure to bactericidal antibodies from humans immunized with Novartis recombinant meningococcal group B vaccines was assessed. Serum bactericidal antibody titers against selected bacteria were within assay variability through a selection event frequency of 1 in 10−5. No change in antigen expression was observed by Western blotting.

scholarly journals Distinct cell surface ligands mediate T lymphocyte attachment and rolling on P and E selectin under physiological flow.

1994 ◽  
Vol 127 (5) ◽  
pp. 1485-1495 ◽  
Author(s):  
R Alon ◽  
H Rossiter ◽  
X Wang ◽  
T A Springer ◽  
T S Kupper
Keyword(s):  
T Cells ◽  
T Cell ◽  
T Lymphocytes ◽  
Cell Surface ◽  
Antigen Expression ◽  
Lymphocyte Antigen ◽  
Selectin Ligands ◽  
Distinct Cell ◽  
Cutaneous Lymphocyte Antigen

Memory T lymphocytes extravasate at sites of inflammation, but the mechanisms employed by these cells to initiate contact and tethering with endothelium are incompletely understood. An important part of leukocyte extravasation is the initiation of rolling adhesions on endothelial selectins; such events have been studied in monocytes and neutrophils but not lymphocytes. In this study, the potential of T lymphocytes to adhere and roll on endothelial selectins in vitro was investigated. We demonstrate that T cells can form tethers and rolling adhesions on P selectin and E selectin under physiologic flow conditions. Tethering and rolling on P selectin was independent of cell-surface cutaneous lymphocyte antigen (CLA) expression, which correlated strictly with the capacity of T cells to form rolling adhesions under flow on E selectin. T cell tethering to P selectin was abolished by selective removal of cell surface sialomucins by a P. haemolytica O-glycoprotease, while cutaneous lymphocyte antigen expression was unaffected. A sialomucin molecule identical or closely related to P selectin glycoprotein ligand-1 (PSGL-1), the major P selectin ligand on neutrophils and HL-60 cells, appears to be a major T cell ligand for P selectin. P selectin glycoprotein ligand-1 does not appear to support T cell rolling on E selectin. In turn, E selectin ligands do not appear to be associated with sialomucins. These data demonstrate the presence of structurally distinct ligands for P or E selectins on T cells, provide evidence that both ligands can be coexpressed on a single T cell, and mediate tethering and rolling on the respective selectins in a mutually exclusive fashion.

scholarly journals Bacille Calmette-Guérin infection in the mouse. Regulation of macrophage plasminogen activator by T lymphocytes and specific antigen.

1978 ◽  
Vol 147 (4) ◽  
pp. 1175-1188 ◽  
Author(s):  
S Gordon ◽  
Z A Cohn
Keyword(s):  
T Lymphocytes ◽  
Plasminogen Activator ◽  
Macrophage Activation ◽  
Specific Antigen ◽  
Peritoneal Macrophages ◽  
Bacille Calmette Guerin ◽  
Vitro Assay ◽  
Purified Protein Derivative ◽  
Peritoneal Cells

High levels of plasminogen activator (PA) were induced in mouse peritoneal macrophages by infection with BCG, 2-6 X 10(7) viable organisms intravenously, followed 3-4 wk later by intraperitoneal challenge with purified protein derivative (PPD) 2 days before harvest. Macrophages obtained from infected animal without boosting showed little fibrinolytic activity, but challenge of Bacille-Calmette-Guèrin (BCG)-primed peritoneal cells with PPD in culture also enhanced macrophage PA 4- to 10-fold. Stimulation of macrophage PA by PPD depended on specifically sensitized thymus-derived (T) lymphocytes because it was abolished by pretreatment of BCG-primed peritoneal cells with anti-thy 1.2 antiserum and complement. A direct assay was developed in which nylon wool separated sensitized lymphocytes and PPD induced PA in macrophages from uninfected animals under defined conditions on 125I-fibrin. Enhanced macrophage fibrinolysis was proportional to concentration of PPD and the number of sensitized lymphocytes transferred. An indirect two-stage assay was also used to show that BCG-sensitized peritoneal cells released a soluble inducer of macrophage PA into the culture medium, after challenge with PPD. Induction of macrophage PA by PPD challenge in vitro made it possible to study the generation and activity of sensitized peritoneal lymphocytes at different stages of infection. Our results show that nonadherent peritoneal cells of BCG-infected mice provide a rich source of specifically sensitized lymphocytes and that macrophage activation is limited by continued availability of antigen, as well as sensitized lymphocytes. Induction of macrophage PA provides a sensitive, versatile, and rapid in vitro assay to study the role of lymphocytes and specific antigen in macrophage activation by BCG.

scholarly journals Independent populations of primed F1 guinea pig T lymphocytes respond to antigen-pulsed parental peritoneal exudate cells.

1977 ◽  
Vol 145 (3) ◽  
pp. 618-630 ◽  
Author(s):  
W E Paul ◽  
E M Shevach ◽  
S Pickeral ◽  
D W Thomas ◽  
A S Rosenthal
Keyword(s):  
T Lymphocytes ◽  
Negative Selection ◽  
Suppressor Cells ◽  
Peritoneal Exudate ◽  
Proliferating Cells ◽  
F1 Hybrid ◽  
Peritoneal Exudate Cells ◽  
Purified Protein Derivative ◽  
Initial Culture

Thymus-dependent (T) lymphocytes from (2 x 13)F1 hybrid guinea pigs immunized to ovalbumin (OVA) in complete Freund's adjuvant can be stimulated to proliferate in vitro by antigen-pulsed peritoneal exudate cells (PECs) derived from either strain 2 or strain 13 donors. In this communication, we show that the population of primed F1 T lymphocytes which can be activated by antigen-pulsed strain 2 PECs is largely independent of the population of cells that can be activated by antigen-pulsed strain 13 PECs. This was demonstrated by both positive and negative selection procedures. In the former, T lymphocytes from OVA-primed (2 x 13)F1 donors were enriched by initial culture with OVA-pulsed strain 2 or strain 13 PECs for 1 wk. Cells selected by culture with OVA-pulsed strain 2 PECs responded well to OVA-pulsed strain 2 PECs and poorly to OVA-pulsed strain 13 PECs. If positive selection had been carried out with OVA-pulsed strain 13 PECs, the selected F1 T cells responded well to OVA-pulsed 13 PECs and poorly to OVA-pulsed 2 PECs. Negative selection was achieved by short term culture with antigen-pulsed PECs and by eliminating proliferating cells by treatment with bromodeoxyuridine and light. This procedure demonstrated that the population of primed F1 T lymphocytes which are responsive to OVA or to purified protein derivative of tuberculin can be divided into subpopulations uniquely responsive to antigen on either strain 2 or strain 13 PECs. Evidence was presented to indicate that this selective responsiveness was not the result of the action of alloantigen-specific suppressor cells. The results are considered in terms of current concepts of the genetic and molecular regulation of the interaction of PECs and T lymphocytes.

In Vitro Development of Macrophages from PHA-stimulated Blood Cultures in Hodgkin's Disease and in Chronic Lymphocytic Leukaemia.

1976 ◽  
Vol 62 (1) ◽  
pp. 19-24
Author(s):  
Roberto Navone ◽  
Mauro Tosto ◽  
Ester Poggio
Keyword(s):  
Chronic Lymphocytic Leukaemia ◽  
Hodgkin's Disease ◽  
Lymphocytic Leukaemia ◽  
Hodgkin’S Disease ◽  
Normal Subjects ◽  
Blood Cultures ◽  
Blast Transformation ◽  
Lymphocyte Blast Transformation ◽  
Vitro Development

Blood was cultured from 17 normal subjects, 28 cases of untreated chronic lymphocytic leukaemia (CLL) and 41 cases of Hodgkin's disease. Macrophages were not observed in PHA-stimulated cultures of normal subjects, of CLL or of 18 cases of Hodgkin's disease. The latter had an almost normal rate of lymphocyte blast transformation (70,2 ± 7,2%). On the other hand, macrophages were numerous in PHA-stimulated cultures of 23 cases of Hodgkin's disease with a low blast transformation (28,4 ± 13,7%). In Hodgkin's disease the development of macrophages in PHA cultures may be related to the lower blast transformation and cytotoxic activity of lymphocytes. In CLL the dilution of lymphocytes and monocytes by leukaemic B cells may account both for PHA unresponsiveness and low yield of macrophages in culture.

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