Innate Lymphoid Cells (Non‐NK ILCs)

Until a decade ago, natural killer (NK) cells constituted the major—if not the sole—player of innate lymphoid cell populations. The discovery of the presence and execution of curial functions by lymphoid tissue inducer‐like cells (LTi) in adults is followed by the discovery of Th2‐like innate cells and later Th1‐like helper group 1 ILCs. With these findings, the innate lymphocyte family has expanded and a new paradigm has emerged. Apparently, innate versions of helper subsets of CD4+ T cells existed in humans and mice. These cells, unlike their adaptive counterparts, lack CD3, T and B cell receptors, do not rearrange their antigen receptors and get activated by microbial products or cytokines. Furthermore, these cells rely on similar transcription factors that helper CD4+ T cells use for their development and functions (such as T‐bet, Gata3 and Rorγt); they produce similar effector cytokines (such as IFN‐γ; IL‐5, IL‐13, IL‐4; IL‐17A, IL‐22, GMCSF, respectively). Moreover, these cells assume crucial functions as an immediate, first line source of cytokines/chemokines against pathogens during protective immune responses. Lastly, very much like their adaptive counterparts, they are present and contribute to pathogenesis in various chronic inflammatory diseases of mice and humans in several tissues

Utilization of Water Hyacinth and Banana Wastes Compost in Reclamation of Sandy Soils for Increasing Growth, Yield of Cowpea

Pot experiments were carried out in the greenhouse of the Faculty of Agriculture, Fayoum University, to study the effect of water hyacinth and banana wastes compost (0, 10, 15 and 20 ton/fed) combined with inorganic nitrogenous fertilizers namely ammonium sulphate, ammonium nitrate and urea (in the rate of 60 kg N/Fed and this rate was 50% of the recommended dose), on the growth, yield and nutrient content of cowpea plants. All pots received P and K as recommended. The addition of various rates of water hyacinth and banana wastes composts (H.B.C.) under study significantly increased all plant growth parameters under the study, i.e., plant height, plant fresh weight and dry weight of both shoots and roots, the number of root nodules as well as the nutrient content of the different plant organs compared with the control and the chemical fertilizer application of the recommended dose (100%). There was a marked increase in pod characters, yield and its components, i.e., number of pods per plant, length, diameter and weight of pods per plant. The highest values of growth characters of yield and its components and the contents of nutrient elements were noticed when applying compost at the higher rates (20 ton/fed.) followed by 15 and 10 ton/fed., in a descending order as compared with the control. The best combination of nitrogen forms and the compost is considered to be one of the primary factors for high yield production and quality as well as yield components of cowpea. The highest significant increase in growth characters, yield and yield components, as well as the total carbohydrates and crude protein content of the seeds, were obtained via the application of compost in combination with ammonium sulphate at the rate of 20 ton/fed

Evaluation of the genotoxicity and cytotoxicity in the general population in Turkey by use of the cytokinesis-block micronucleus cytome assay

The cytokinesis-block micronucleus cytome (CBMN-Cyt) assay was originally developed as an ideal system for measuring DNA damage, cytostasis and cytotoxicity. The objective of the present study is to simultaneously evaluate the background levels of micronuclei (MN), nucleoplasmic bridges (NPBs), nuclear buds (NBUDs), cell death (necrosis or apoptosis) and nuclear division index (NDI) in the peripheral blood lymphocytes of non-occupationally exposed, healthy subjects living in the city of Kayseri in Turkey. We used the CBMN-Cyt assay, taking into account factors - age, gender, and smoking habits - that might affect MN frequency and also other CBMN-Cyt assay parameters. Ninety-six healthy subjects (48 female and 48 male) were selected with ages varying between 21 and 60 years. The parameters, except for the number of binucleated (BN) cells with NPBs, showed no statistically significant difference between smokers and non-smokers. There were significant differences between female and male groups in MN frequency (higher in females) and in the number of NPBs (lower in females), while the other parameters were not significantly different between genders. The correlations between years of age and MN frequency, number of NPBs and the frequency of necrotic cells were statistically significant, while the correlations between the years of age and the other parameters were not. The results of the correlation analysis between years of smoking and MN frequency were positive, although no statistically significant correlation was found between the years of smoking and the other parameters. Among the smokers, no correlation was found either between the pack-years of smoking and the parameters assessed in this group. The results of the present study provide evidence of increasing MN frequency, number of NPBs and frequency of necrotic cells with increasing age in the peripheral blood lymphocytes of healthy individuals and influencing MN frequency and number of NPBs by gender. (c) 2012 Elsevier B.V. All rights reserved

Basal level micronucleus frequency in stimulated lymphocytes of untreated patients with leukemia

Structural chromosomal aberrations have been described in various types of human leukemia. The micronucleus technique provides a measure of both chromosome breakage and chromosome loss. The present study investigated micronucleus (MN) frequency in mitogen-stimulated peripheral blood lymphocytes from 20 newly diagnosed and untreated leukemia patients: 4 with acute lymphoblastic leukemia (ALL), 10 with acute myeloid leukemia (AML), and 6 with chronic lymphocytic leukemia (CLL). The mean MN frequency for untreated patients was 3.65 +/- 1.47 in ALL, 3.55 +/- 1.24 in AML, 3.03 +/- 1.05 in CLL. No differences in MN frequency were seen between leukemia types ALL, AML, and CLL (P = 0.503). The mean basal MN frequency for all patients, regardless of leukemia type, was 3.41 +/- 1.19, which was significantly higher (P = 0.001) than that of 20 age-matched control subjects, 1.87 +/- 0.75. Although no significant relationship was found between age and MN frequency in patients with leukemia (r = 0.050; P = 0.835), the MN frequency in the lymphocytes of healthy control increased regularly and significantly with age (r- = 0.531; P = 0.016). These data indicate that the increased baseline MN frequency in lymphocytes of untreated patients with leukemia may reflect genomic instability or deficiency of DNA repair capacity. MN enhancement in this disease may thus be a consequence of the disease process. (C) 2008 Elsevier Inc. All rights reserved

Evaluation of genotoxicity, cytotoxicity and cytostasis in human lymphocytes exposed to patulin by using the cytokinesis-block micronucleus cytome (CBMN cyt) assay

Patulin (PAT) is a fungal secondary metabolite commonly present in apples and apple products. In the present study, PAT was evaluated for its genotoxic, cytotoxic and cytostatic effects to human peripheral blood lymphocytes by using the cytokinesis-block micronucleus cytome (CBMN Cyt) assay. Lymphocyte cultures were treated with PAT at the following concentrations, 0.1, 0.3, 0.5, 1.0, 2.5, 5.0, and 7.5 mu M, as well as 0.5 mu M mitomycin c (MMC) as a positive control and dimethyl sulfoxide (DMSO) as a vehicle control. PAT was found to induce nucleoplasmic bridges (NPBs) at 5.0 and 7.5 mu M concentrations (P<0.05), apoptotic cells at 0.1, 1.0, 5.0 mu M (P< 0.05), 7.5 mu M concentrations (P< 0.01) and necrotic cells at 0.3 and 2.5 mu M (P< 0.05), 5.0 and 7.5 mu M (P < 0.01) concentrations in human lymphocytes. The 2.5, 5.0, and 7.5 mu M PAT concentrations also led to a clear decrease in the nuclear division index (NDI) (P< 0.05). PAT caused a significant dose-dependent increase in the number cells of NPBs, in the frequency of apoptotic and necrotic cells, and a significant dose-dependent decrease in the NDI values in lymphocytes. These results indicate that PAT at high concentrations is genotoxic, cytotoxic and cytostatic in cultured human lymphocytes

Higher NORs-expression in lymphocyte of trisomy 21 babies/children: In vivo evaluation

Extra chromosome 21 of Down syndrome (DS) or trisomy 21 patients contains an average of 40 extra copies of rRNA genes and the in vivo regulation of these genes is not known. The objective of this work is to compare the NORs expression in interphase nuclei in non-stimulated lymphocytes of DS patients and healthy controls

Micronucleus evaluation in mitogen-stimulated lymphocytes of narrow-band (311 nm TL01) UVB-treated patients

Background: Narrow-band UVB (311 nm) lamps (TL01) are being increasingly used for phototherapy of psoriasis and other dermatoses, for their excellent effect compared with broad-band UVB sources and photochemotherapy. It is acknowledged that the TL01 lamp is probably two to three times more carcinogenic per minimum erythema dose than broad-band UVB, but the cumulative dose is considerably less than broadband UVB sources. Micronucleus (MN) test is used to detect both clastogenic (breaking) and aneugenic (abnormal segregation) effect of physical/chemical agents on chromosomes. The aim of this study is to evaluate MN frequencies in mitogen-stimulated lymphocytes of narrow-band UVB-treated patients