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ELISA Kit for Interferon Alpha (IFNa) Organism: Rhesus monkey (Simian)

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[#E90033Si] ELISA Kit for Interferon Alpha (IFNa) Organism: Rhesus monkey (Simian)


E90033Si | ELISA Kit for Interferon Alpha (IFNa) Organism: Rhesus monkey (Simian), 96T
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(1) Neutralizing antibody production against Rebif® and ReciGen® in Relapsing-Remitting Multiple Sclerosis (RRMS) patients and its association with patient's disability.[TOP]

Pubmed ID :29990690
Publication Date : //
Human recombinant interferon beta (IFN-β) is one of the first line treatments for Relapsing-Remitting Multiple Sclerosis (RRMS). However, the production of neutralizing antibodies (NAb) can impair its function. The aim of this study was to investigate the production of neutralizing antibodies against Rebif® and ReciGen® (two brands of IFN-β-1a) and to evaluate its correlation with Expanded Disability Status Scale (EDSS).

Authors : Shokrollahi Barough Mahdieh, Ashtari Fereshteh, Sadat Akhavi Mehdi, Asghari Nabiollah, Mosayebi Ghasem, Mirmohammadkhani Majid, Kokhaei Naser, Bahraminia Farhad, Ajami Arman, Kokhaei Parviz,

(2) Tryptophan metabolic profile in term and preterm breast milk: implications for health.[TOP]

Pubmed ID :29686862
Publication Date : //
Breast milk is the only source of the essential amino acid tryptophan (TRP) in breast-fed infants. Low levels of TRP could have implications for infant neurodevelopment. The objectives of the present study were to compare the relationship of TRP and its neuroactive pathway metabolites kynurenine (Kyn) and kynurenic acid (KynA) in preterm and term expressed breast milk (EBM) in the first 14 d following birth, and the relationship of TRP metabolism to maternal stress and immune status. A total of twenty-four mothers were recruited from Cork University Maternity Hospital: twelve term (>38 weeks) and twelve preterm (<35 weeks). EBM samples were collected on days 7 and 14. Free TRP, Kyn and KynA were measured using HPLC, total TRP using MS, cytokines using the Meso Scale Discovery (MSD) assay system, and cortisol using a cortisol ELISA kit. Although total TRP was higher in preterm EBM in comparison with term EBM ( < 0·05), free TRP levels were lower ( < 0·05). Kyn, KynA and the Kyn:TRP ratio increased significantly in term EBM from day 7 to day 14 ( < 0·05), but not in preterm EBM. TNF-α, IL-6 and IL-8 were higher in day 7 preterm and term EBM in comparison with day 14. There were no significant differences between term and preterm EBM cortisol levels. Increased availability of total TRP, lower levels of free TRP and alterations in the temporal dynamics of TRP metabolism in preterm compared with term EBM, coupled with higher EBM inflammatory markers on day 7, may have implications for the neurological development of exclusively breast-fed preterm infants.

Authors : O'Rourke Louise, Clarke Gerard, Nolan Aoife, Watkins Claire, Dinan Timothy G, Stanton Catherine, Ross R Paul, Ryan Cornelius Anthony,

(3) Characterization of exosomes derived from and their functions in modulating immune responses.[TOP]

Pubmed ID :29403276
Publication Date : //
Exosomes are nanograde membrane-bound vesicles secreted from most cell types through the fusion of multivesicular bodies with plasma membranes. Some of these exosomes are well defined, and are known to have immunomodulatory properties as well as play critical roles in intercellular communications. In this study, we characterized the exosomes derived from and their functions in aspect of immune responses.

Authors : Li Yawen, Liu Yuan, Xiu Fangming, Wang Jianing, Cong Hua, He Shenyi, Shi Yongyu, Wang Xiaoyan, Li Xun, Zhou Huaiyu,

(4) Ultrasound-targeted microbubble destruction-mediated Foxp3 knockdown may suppress the tumor growth of HCC mice by relieving immunosuppressive Tregs function.[TOP]

Pubmed ID :29387180
Publication Date : //
The aim of the present study was to investigate the effect of Forkhead family transcription factor P3 (Foxp3) knockdown on the function of cluster of differentiation (CD)4CD25 regulatory T cell (Tregs) and the tumor growth of a hepatocellular carcinoma (HCC) mouse model. CD4CD25 Tregs and CD4CD25 T cells were sorted from peripheral blood mononuclear cells (PBMCs) of patients with HCC. Then, ultrasound-targeted microbubble destruction (UTMD)-mediated Foxp3-microRNA (miRNA) was transfected into Tregs. Subsequently, CD4CD25 T cells were co-cultured with PBMC and Tregs without Foxp3-miRNA (Foxp3Tregs) or Tregs with Foxp3-miRNA (Foxp3Tregs) and the proliferation-inhibition ratio of CD4CD25 T cells was detected using a Cell Counting Kit-8. Additionally, HCC mice were treated with UTMD-mediated Foxp3-shRNA, the tumor volume was calculated and the content of CD4 and CD25 T cells in the blood were detected using flow cytometry. The content of interferon-γ (IFN-γ), interleukin (IL)-2, IL-10, transforming growth factor-β (TGF-β) and vascular endothelial growth factor (VEGF) in cultural supernatant and serum were detected by ELISA analysis. Foxp3Tregs significantly reduced the inhibition effect of Foxp3Tregs on the proliferation of CD4CD25 T cells (P<0.01). The content of IFN-γ and IL-2 significantly increased, while IL-10 and TGF-β significantly decreased in the co-cultured system of Foxp3Tregs compared with the co-cultured system of Foxp3Tregs (P<0.01). Following treatment with Foxp3-shRNA, the average tumor volume, ratio of Tregs/CD4 T cells and level of IL-10, TGF-β and VEGF significantly decreased, however, the level of IFN-γ and IL-2 significantly increased compared with un-treated HCC mice (P<0.05). Foxp3 knockdown may suppress the tumor growth of HCC mice through relieving the immunosuppressive function of Tregs.

Authors : Shi Chunying, Zhang Yu, Yang Haichao, Dong Tianxiu, Chen Yaodong, Xu Yutong, Yang Xiuhua, Liu Pengfei,

(5) Effects of Salvia miltiorrhiza Polysaccharides on Lipopolysaccharide-Induced Inflammatory Factor Release in RAW264.7 Cells.[TOP]

Pubmed ID :29328882
Publication Date : //
This study investigated the anti-inflammatory effects and possible underlying mechanisms of Salvia miltiorrhiza polysaccharides (SMP) in lipopolysaccharide (LPS)-stimulated RAW264.7 cells. The cytotoxicity of SMP was detected by the MTT method. The morphological change of RAW264.7 was observed by Diff-Quik staining. Enzyme-linked immunosorbent assay was used to evaluate the production of cytokines in LPS-induced RAW264.7 cells. The nitric oxide (NO) kit assay detected the NO release from LPS-induced RAW264.7 cells. Real-time polymerase chain reaction was used to detect the transcriptions of tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), inducible NO synthase (iNOS), and cyclooxygenase (COX)-2 in LPS-induced RAW264.7 cells. The protein expression of nuclear NF-κB was measured by Western blot. The results showed that the safe medication range of SMP was less than 3 mg/mL. Compared with the LPS model group, SMP (2, 1, and 0.5 mg/mL) improved the degree of cell deformation and reduced the amount of pseudopodia, and statistically reduced the secretions of cytokines in cells induced by LPS (P < 0.01) at different time points. SMP significantly inhibited the mRNA transcriptions of TNF-α, IL-6, iNOS, and COX-2 and the protein expressions of NF-κB, p-p65, and p-IκBa. In conclusion, this study preliminarily proved the protective effect of SMP on LPS-induced RAW264.7 macrophage. Its mechanism might be related to inhibition of NF-κB signal pathway and the gene expressions and secretion of cytokines.

Authors : Han Chao, Yang Jinkai, Song Pengyan, Wang Xiao, Shi Wanyu,

(6) Human Leukocyte Antigen-G Inhibits the Anti-Tumor Effect of Natural Killer Cells via Immunoglobulin-Like Transcript 2 in Gastric Cancer.[TOP]

Pubmed ID :29224003
Publication Date : //
Human leukocyte antigen-G (HLA-G) plays an important role in inhibiting natural killer (NK) cell function and promoting immune escape. However, the specific mechanism of HLA-G on NK in gastric cancer (GC) remains not well understood. This study investigated the expression of HLA-G in GC and the role of HLA-G-effected NK cells in GC progression.

Authors : Wan Rui, Wang Zi-Wei, Li Hui, Peng Xu-Dong, Liu Guang-Yi, Ou Jun-Ming, Cheng An-Qi,

(7) Role of miR-124a in T cell activation and immunity in AIDS patients.[TOP]

Pubmed ID :29201183
Publication Date : //
The role of microRNA-124a (miR-124a) in the regulation of T cell activation and immunity in patients with AIDS, was studied to provide new insights for the study, diagnosis, alleviation and treatment of AIDS. RT-qPCR technique was used to quantitatively analyze the expression of miR-124a in peripheral blood CD4 T cells. Dual-luciferase reporter assay system was established to report possible regulatory relations between miR-124a and its potential target gene SIRT1. RT-qPCR and western blot analysis were used to detect the expression level of mRNA and protein of the target genes in T cells. Normal CD4 T cells from controls were transfected with miR-124a mimics and its negative control, and miR-124a inhibitor and its negative control were transfected into CD4 T cells from patients with AIDS by T lymphocyte transfection kit to detect the relative expression level of SIRT1 mRNA and protein. The levels of interferon (IFN)-γ, interleukin (IL)-10, transforming growth factor (TGF)-β, IL-2, IL-4 and IL-6 secreted by T helper cells were detected by enzyme-linked immunosorbent assay (ELISA). miR-124a was upregulated in CD4 T cells of patients with AIDS. The results of firefly luciferase activity detection showed that miR-124a can directly interact with target gene SIRT1 and negatively regulate its expression. miR-124a mimics/inhibitor transfection experiments showed that overexpression of miR-124a in normal CD4 T cells significantly reduced SIRT1 expression compared with control group, and the expression of miR-124a was positively correlated with IL-10 and TGF-β expression and negatively correlated with IFN-γ expression, but showed no correlation with other cytokines. In AIDS patients, the inhibition of expression of miR-124a in CD4 T cells significantly increased the expression of SIRT, at the same time, the expression levels of IL-10 and TGF-β were significantly decreased, while the expression level of IFN-γ was significantly increased and no significant difference was found in the expression of other cytokines. The expression of miR-124a in CD4 T cells of AIDS patients was upregulated and the Th2 type CD4 T cells are activated by SIRT1 expression inhibition, which in turn enhance the immunity of HIV-infected cells. Our study provides a new molecular target for the diagnosis, alleviation and treatment of AIDS.

Authors : Zhao Wenge, Liu Chuansheng, Shi Changhe, Fan Tianli, Chu Kaiqiu, Ma Yanli,

(8) Plasma But Not Cerebrospinal Fluid Interleukin 7 and Interleukin 5 Levels Pre-Antiretroviral Therapy Commencement Predict Cryptococcosis-Associated Immune Reconstitution Inflammatory Syndrome.[TOP]

Pubmed ID :29048509
Publication Date : //
Patients with human immunodeficiency virus/AIDS-associated cryptococcal meningitis (CM) frequently experience clinical deterioration, known as cryptococcosis-associated immune reconstitution inflammatory syndrome (C-IRIS), upon initiation of antiretroviral therapy (ART). The immunological mechanisms underlying C-IRIS are incompletely defined and no reliable predictive biomarkers exist. We investigated whether plasma or cerebrospinal fluid (CSF) levels of cytokines and chemokines predicted C-IRIS and are potential predictive biomarkers.

Authors : Akilimali Ngomu Akeem, Chang Christina C, Muema Daniel M, Reddy Tarylee, Moosa Mahomed-Yunus S, Lewin Sharon R, French Martyn A, Ndung'u Thumbi,

(9) Serum IFN-λ3 Levels Correlate with Serum Hepatitis C Virus RNA Levels in Symptomatic Patients with Acute Hepatitis C.[TOP]

Pubmed ID :29040985
Publication Date : //
Recent genome-wide association studies demonstrated that 2 single nucleotide polymorphisms (SNPs), upstream of the interferon-λ (IFNL) 3 gene, are associated with the spontaneous clearance of hepatitis C virus (HCV) in symptomatic patients with acute hepatitis C (AHC). Although these 2 SNPs, rs8099917 and rs12979860, have established their significant roles in the innate immunity response to spontaneously clear HCV in patients with AHC, the detailed mechanisms of their roles remain largely unknown.

Authors : Imoto Susumu, Kim Soo Ryang, Amano Keisuke, Iio Etsuko, Yoon Seitetsu, Hirohata Shigeya, Yano Yoshihiko, Ishikawa Toru, Katsushima Shinji, Komeda Toshiki, Fukunaga Toyokazu, Chung Hobyung, Kokuryu Hiroyuki, Horie Yutaka, Hatae Takashi, Fujinami Aya, Kim Soo Ki, Kudo Masatoshi, Tanaka Yasuhito,

(10) The crosstalk between endometrial stromal cells and macrophages impairs cytotoxicity of NK cells in endometriosis by secreting IL-10 and TGF-β.[TOP]

Pubmed ID :28971893
Publication Date : //
The dysfunction of NK cells in women with endometriosis (EMS) contributes to the immune escape of menstrual endometrial fragments refluxed into the peritoneal cavity. The reciprocal communications between endometrial stromal cells (ESCs) and lymphocytes facilitate the development of EMS. However, the mechanism of these communications on cytotoxicity of natural killer (NK) cells in endometriotic milieus is still largely unknown. To imitate the local immune microenvironment, the co-culture systems of ESCs from patients with EMS and monocyte-derived macrophages or of ESCs, macrophages and NK cells were constructed. The cytokine levels in the co-culture unit were evaluated by ELISA. The expression of functional molecules in NK cells was detected by flow cytometry (FCM). The NK cell behaviors were analyzed by cell counting kit-8 and cytotoxic activation assays. After incubation with ESCs and macrophages, the expression of CD16, NKG2D, perforin and IFN-γ, viability and cytotoxicity of NK cells were significantly downregulated. The secretion of interleukin (IL)-1β, IL-10 and transforming growth factor (TGF)-β in the co-culture system of ESCs and macrophages was increased. Exposure with anti-IL-10 receptor β neutralizing antibody (αhIL-10Rβ) or αTGF-β could partly reverse these effects of ESCs and macrophages on NK cells These results suggest that the interaction between macrophages and ESCs downregulates cytotoxicity of NK cells possibly by stimulating the secretion of IL-10 and TGF-β, and may further trigger the immune escape of ectopic fragments and promote the occurrence and the development of EMS.

Authors : Yang Hui-Li, Zhou Wen-Jie, Chang Kai-Kai, Mei Jie, Huang Li-Qing, Wang Ming-Yan, Meng Yi, Ha Si-Yao, Li Da-Jin, Li Ming-Qing,