Evaluation of Polymorphisms in IL8 and IL16 Genes in Patients with Acute Coronary Syndrome

Abstract Background: Acute coronary syndrome (ACS) is a cardiovascular disease caused by obstruction of coronary arteries by atheromatous plaque. Susceptibility to this disease may be related to genetic variations, such as single nucleotide polymorphisms (SNPs). Objective: In this study, we evaluated the relationship between SNPs in IL8 (rs4073; -251 A/T) and IL16 (rs11556218; T/G) genes and SCA in a Brazilian population. Materials and Methods: A sample of 200 patients with ACS and 50 non-ACS patients hospitalized at the Real Hospital Português, Recife - PE, Brazil, and 220 blood donors (donors) was used. Genotyping was carried out by polymerase chain reaction, and DNA sequencing. Statistical analyzes were performed using the Williams G, Chi-square and Kruskal Wallis tests, using the BioEstat 5.0 program, and the data with a value of p < 0.05 were considered significant. Results: In the IL8 gene, the AT genotype was the most frequent (p > 0.05) in all three groups. In the IL16 gene, genotypic distributions were different between patients with ACS and the donor group (p = 0.002), with the most frequent G allele in the second group (p = 0.0052). The IL-16 cytokine was higher in donors than in patients with ACS (p = 0.04) and the G (TG + GG) allele had higher values of this cytokine (p = 0.01). Conclusions: The results demonstrate the important role of the rs11556218 SNP in IL16 gene in SCA, evidencing that the G allele may be associated with a decreased risk of the disease.

Effect of Hydroxychloroquine Treatment on Dry Eyes in Subjects with Primary Sjögren's Syndrome: a Double-Blind Randomized Control Study

The effect of hydroxychloroquine (HCQ) on dry eye has not been fully determined. This study aimed to compare the 12-week efficacy of HCQ medication with that of a placebo in the management of dry eye in primary Sjögren's syndrome (pSS). A double-blind, randomized control study was conducted in 39 pSS subjects from May 2011 through August 2013. pSS was diagnosed based on the classification criteria of the American-European Consensus Group. Subjects received 300 mg of HCQ or placebo once daily for 12 weeks and were evaluated at baseline, 6, and 12 weeks, with a re-visit at 16 weeks after drug discontinuance. The fluorescein staining score, Schirmer test score, tear film break-up time (TBUT), and ocular surface disease index (OSDI) were measured, and tears and blood were collected for ESR, IL-6, IL-17, B-cell activating factor (BAFF), and Th17 cell analysis. Color testing was performed and the fundus was examined to monitor HCQ complications. Twenty-six subjects completed the follow-up. The fluorescein staining score and Schirmer test score did not differ significantly. The OSDI improved with medication in the HCQ group but was not significantly different between the groups. TBUT, serum IL-6, ESR, serum and tear BAFF, and the proportion of Th17 cells did not change in either group. HCQ at 300 mg daily for 12 weeks has no apparent clinical benefit for dry eye and systemic inflammation in pSS (ClinicalTrials.gov. NCT01601028).

Observation of the inflammatory factors level and the correlation between induced sputum and whole lung lavage fluid for silicosis / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To detect the inflammatory factors of induced sputum (IS) and whole lung lavage fluid in pneumonoconiosis patients and to explore the correlation between the inflammatory factors with pulmonary function.</p><p><b>METHODS</b>The records of 45 cases of pneumonoconiosis patients were observed. All patients underwent lung function examination, sputum induction and massive whole lung lavage (WLL) sequentially through advance. IS and whole lung lavage fluid were collected respectively. Inflammatory factors of the two specimens were detected by using enzyme linked immunosorbent assay. The correlation of inflammatory factors between the two specimens was analyzed. The relationship between the inflammatory factor and lung function index was observed. The statistical analysis is performed with SPSS 17.0 for Windows. P < 0.05 is considered to be statistically significant.</p><p><b>RESULTS</b>Cytokines (MCP-1, TNF-α MIP-1α, NO(2)(-)/NO(3)(-) and IL-16) were significantly associated between IS and whole lung lavage fluid (P < 0.05), while TNF-α, MCP-1, NO(2)(-)/NO(3)(-) and IL-16 were no significantly associated with lung function index (P > 0.05). MIP-1α was significantly associated with FEV(1.0)/VCmax and MEF(25), respectively (P < 0.05).</p><p><b>CONCLUSIONS</b>Inflammatory factors were significantly associated between IS and whole lung lavage fluid, which could indicate early lung injury in pneumonoconiosis patients.</p>

The discriminant analysis of the silicosis's induction on cytokines in phlegm and combined multi-markers / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To investigate the changes of cytokines in induced sputum at different stages of silicosis patients.</p><p><b>METHODS</b>A total of 200 workers from one of the Shandong Province gold mine were chosen as object of observation. Among which 40 patients at silicosis stage I and 40 patients at silicosis stage II were divided into silicosis observed object group, silicosis stage I group, silicosis stage II group, and another 80 workers exposed to silica dust without suffering from silicotic Clinical symptoms, however, were chosen as group of dust exposed, and 40 logistical workers without being exposed and history of silicosis's illness were chosen as control group. And ask their basic information by questionnaire. Then, spray-inhalation the induced sputum and apply the ELISA to assess the level of tumor necrosis factor (TNF), interleukin (IL), macrophage inflammatory protein-1 (MIP-1α), monocyte chemotactic factor-1 (MCP-1), metalloproteinases (MMP), transforming growth factor-β (TGF-β), platelet derived growth factor (PDGF) in induced sputum from subjects.</p><p><b>RESULTS</b>The level of TGF-β [(901.60 ± 30.09) ng/L] in the induced sputumof patients in silicosis stage I group is lower than that in the observed object group [(913.02 ± 20.51) ng/L], and the level of MMP-9 [(212.49 ± 5.97) ng/L], MCP-1 [(129.91 ± 4.30) ng/L] has various degrees of increase than that in control group, observed object group and dust exposed group. All the differences have statistical significances (P < 0.05). The level of TNF-α [(85.76 ± 3.78) ng/L] in the induced sputum of patients in silicosis stage I group reaches the maximum, there are significant differences comparing with that level in the silica dust exposure group and the control group, whose differences are statistically significant (P < 0.05). Compared with the control group, the level of MMP-2 (427.95 ± 23.64) in the induced sputum of patients in silicosis stage I group has increased, whose differences also have statically significant (P < 0.05). Compared with the control group, silica dust exposed group, the observation group of objects, the pneumosilicosis patients of IL-16 in induced sputum IL-16 (21.40 ± 9.24) decreased, the content of PDGF [(5.96 ± 0.51) ng/L], MMP-2 [(447.86 ± 27.10) ng/L], MMP-9 [(223.91 ± 12.28) ng/L], MCP-1 [(122.87 ± 6.08) ng/L] increased, the differences are statistically significant (P < 0.05).</p><p><b>CONCLUSION</b>As silicosis biomarkers, TNF-alpha, TGF-beta, IL-16, PDGF, MMP-2, MMP-9 and MCP-1 have certain significance, further suggesting that early detection rate of patients with silicosis can be improved by employing the multiple indexes discriminate equation.</p>

Analysis of the level and significance of IL-16 and IL-17 in nasal secretion and in serum of patients with allergic rhinitis and non-allergic rhinitis / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To test the immunoglobulin free light chain (FLC) from nasal secretion and serum of patients with allergic rhinitis(AR)and non-allergic rhinitis(NAR) for the purpose of exploring the possible immunological mechanism.@*METHOD@#Ninety consecutive patients were selected between January 2009 and January 2012, involving 45 patients with AR and 45 patients with NAR diagnosed by symptoms,signs,skin prick tests(SPT) and specific IgE (slgE). Forty-five volunteers were chosen as healthy control (HC). According to the visual analogue scale (VAS) scores,the nasal symptoms of AR and NAR,including sneeze. Nasal discharge. Nasal obstruction and nasal itching were compared. ELISA was used to detect the total IgE, IL-16, IL-17 in nasalsecretion and serum. The data was analyzed by SPSS 17.0 software.@*RESULT@#There was no statistical difference between AR and NAR group in nasal symptoms (P > 0.05); In serum, IL-16 and IL-17 increased in AR group comparared to NAR group (P < 0.05); IL-16 and IL-17 increased in NAR group comparared to HC group (all P < 0.05); In nasal secretion, IL-16 and IL-17 increased in NAR and AR group comparared to HC group (all P < 0.05).@*CONCLUSION@#IL-16, IL-17 takes part in the path of physiological process of AR and NAR with the immunological mechanism.

Expression and significance of pulmonary surfactant protein D and IL-16 in allergic rhinitis and nasal polyps / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To detect the expression and distribution of the lung surfactant protein D (surfactant protein D,SP-D ) and IL-16 in nasal mucosa of allergic rhinitis and nasal polyps, and then probe into their significance in the pathology of allergic rhinitis and nasal polyps.@*METHOD@#Fifteen cases of allergic rhinitis, fifteen cases of nasal polyps and fifteen cases of inferior turbinate mucosa were studied to detect the expression of SP-D and IL-16 by immunohistochemistry method.@*RESULT@#The expression of SP-D and IL-16 in allergic rhinitis and nasal polyps were dramatically higher in controls (P 0.05).@*CONCLUSION@#Both normal tissue and diseased tissue express SP-D and IL-16. SP-D is likely to play key roles in the inflammatory reaction process of allergic rhinitis and nasal polyps. IL-16 is an important eosinophil chemokine in the process of allergic rhinitis and nasal polyps,and it can also enhance the local role of eosinophils,thus it can involve in the process of allergic rhinitis and nasal polyps disease.

Changes of cell factor in bronchoalveolar lavage fluid in rats exposed to silica / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To investigate the changes in the levels of inflammatory cytokines in bronchoalveolar lavage fluid (BALF) in rats exposed to silica dust.</p><p><b>METHODS</b>Experimental rats were randomly divided into control group and three experimental groups (doses of dust: 15, 30, and 60 mg/ml), with 42 rats in each group. Each rat in the control group was treated with 1 ml of normal saline by intratracheal instillation, while each rat in the experimental groups was exposed to 1 ml of silica suspension by a single intratracheal instillation. Seven rats in each group were killed at 1, 3, 7, 14, 21, and 28 days after exposure, and then BALF was collected. Enzyme-linked immunosorbent assay was used to measure the levels of interleukin (IL)-1, IL-6, IL-16, macrophage inflammatory protein-1 alpha (MIP-1α), monocyte chemoattractant protein-1 (MCP-1), tumor necrosis factor-α (TNF-α), and transforming growth factor-β (TGF-β).</p><p><b>RESULTS</b>The levels of cytokines in each experimental group were higher than those in the control group at any time point. In the early stage of exposure (day 1-3), BALF IL-1 level increased significantly with the increase in dust dose, and on day 14, BALF IL-6 and IL-16 levels increased significantly with the increase in dust dose; the levels of IL-1, IL-6, and IL-16 in the experimental groups reached the peak on day 14. There were significant differences in the levels of MIP-1α and MCP-1 between the experimental groups (FMIP-1α = 30.106, P<0.01; FMCP-1 = 17.193, P<0.01). In each group, the level of MCP-1 varied significantly at different time points (F = 0.618, P>0.05). On day 1-14, BALF TNF-α level increased with the increase in dust dose, with a significant dose-response relationship (P < 0.05). In each experimental group, TNF-α level reached the peak on day 14. On days 14, 21, and 28, the high-dose group had significantly higher BALF TGF-β levels than the low-dose group (P<0.05); on days 14 and 28, the high-dose group had significantly higher BALF TGF-β levels than the middle-dose group (P<0.05).</p><p><b>CONCLUSION</b>IL-1, IL-6, IL-16, MIP-1α, MCP-1, and TNF-α play a role in the development and progression of silicosis inflammation. TGF-β may be related to (related to; associated with; correlated with) fibrosis.</p>

Association between polymorphisms in IL-16 genes and coronary heart disease risk

We aimed to investigate the role of polymorphisms in IL-16 genes on the susceptibility of Coronary Artery Disease [CAD]. A total of 260 CAD cases and 281 health controls were collected between January 2008 and November 2011. Genotyping of IL-16 rs8034928, rs3848180, rs1131445, rs4778889 and rs11556218 was conducted by polymerase chain reaction [PCR] and matrix-assisted laser desorption/ionization time-of-flight [MALDI-TOF] mass spectrometry technologies. The frequencies of rs8034928 C allele and rs3848180 G allele in the CAD cases in CAD group were significantly higher than in controls. Compared with rs8034928 T/T genotype, a significant higher risk of CAD was found in C/C genotype [OR=1.87, 95%CI=1.17-3.03], and variant of rs8034928 showed a significant increased risk of CAD in dominant [OR=1.48, 95%CI=1.04-2.10] and recessive model [OR=1.70, 95%CI=1.10-2.67]. The rs3848180 G/G was found to be associated with risk of CAD [OR=1.79, 95%CI=1.16-2.75], and G allele carries had a significant risk of CAD [OR=1.47, 95%CI=1.02-2.13]. Our study indicated that rs8034928 and rs11556218 polymorphisms are associated with CAD risk in a Chinese population, and IL-16 gene polymorphisms may be used as a predictor to the susceptibility of CAD

Myeloid differentiation primary response protein 88 blockade upregulates indoleamine 2,3-dioxygenase expression in rheumatoid synovial fibroblasts

Indoleamine 2,3-dioxygenase (IDO) is a key negative regulator of immune responses and has been implicated in tumor tolerance, autoimmune disease and asthma. IDO was detected in the joint synovial tissue in the inflammatory microenvironment of rheumatoid arthritis (RA), but IDO expression in joint synovial tissue is not sufficient to overcome the inflamed synovial environment. This study aimed to unravel the mechanisms involving the failure to activate tolerogenic IDO in the inflamed joint. We demonstrate that both poly (I:C) and lipopolysaccharide (LPS) induce expression of IDO in synovial fibroblasts. However, inflammatory cytokines such as IL-17, TNF-alpha, IL-12, IL-23 and IL-16 did not induce IDO expression. Poly (I:C) appeared to induce higher IDO expression than did LPS. Surprisingly, toll-like receptor (TLR)4-mediated IDO expression was upregulated after depletion of myeloid differentiation primary response protein 88 (MyD88) in synovial fibroblasts using small interfering RNA (siRNA). IDO, TLR3 and TLR4 were highly expressed in synovial tissue of RA patients compared with that of osteoarthritis patients. In addition, RA patients with severe disease activity had higher levels of expression of IDO, TLR3 and TLR4 in the synovium than patients with mild disease activity. These data suggest that upregulation of IDO expression in synovial fibroblasts involves TLR3 and TLR4 activation by microbial constituents. We showed that the mechanisms responsible for IDO regulation primarily involve MyD88 signaling in synovial fibroblasts, as demonstrated by siRNA-mediated knockdown of MyD88.

Cellular sources of interleukin 16 in benign and malignant pleural effusions / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Interleukin 16 (IL-16) can be detected by ELISA in pleural effusion (PE) and its concentration is higher than in serum. This study investigated the cellular sources of IL-16 in PE.</p><p><b>METHODS</b>The samples of PE were collected from 34 patients who were newly diagnosed having PE in the pleural cavity. We performed cell culture to purify the pleural mesothelial cells (PMC), Wright staining to count the purity and immunocytochemical stain to identify the cultured cells. The intracellular IL-16 expression was detected by flow cytometry (FCM). The different cells in PE were first separated by magnetic cell sorting (MCAS) then the separated cells were cultured in RPMI1640 with 10% fetal calf serum (FCS). We extracted the supernatant and detected IL-16 concentration by ELISA. The IL-16 protein was detected by immunohistochemistry and double immunofluorescence staining.</p><p><b>RESULTS</b>The percentages of cells which secreted IL-16 were: CD3(+)CD8(-) cells ((74.27 ± 15.56)%, n = 34); CD3(+)CD8(+) cells ((69.86 ± 18.55)%, n = 34); CD19(+) cells ((45.30 ± 18.77)%, n = 15); CD14(+) cells ((16.91 ± 16.69)%, n = 15); and PMC ((2.05 ± 1.85)%, n = 7). The concentrations of IL-16 in the supernatant from cultured cells were: CD4(+) cells ((102.50 ± 42.51) ng/L, n = 5); CD8(+) cells ((92.58 ± 18.34) ng/L, n = 5); CD19(+) cells ((79.85 ± 5.62) ng/L, n = 5); CD14(+) cells ((58.51 ± 25.38) ng/L, n = 5); and PMC ((18.14 ± 8.37) ng/L, n = 5). In lymphocytes, monocytes/macrophages and PMC, we could observe the cells that expressed IL-16 protein. In paraffin-embedded sections, we also could observe by immunohistochemistry the CD4(+)IL-16(+) cells, CD8(+)IL-16(+) cells, CD19(+)IL-16(+) cells, and CD14(+)IL-16(+) cells.</p><p><b>CONCLUSIONS</b>IL-16 in PE is mainly secreted by T lymphocytes, including CD3(+)CD8(-) cells and CD3(+)CD8(+) cells. CD19(+) cells and CD14(+) cells can also secrete IL-16, but the percentage of PMC that can secrete IL-16 is very low.</p>

Serum cytokine profiling of prostate cancer and benign prostatic hyperplasia using recombinant antibody microarray / 中华男科学杂志

<p><b>OBJECTIVE</b>To identify the differential expressions of serum cytokines between prostate cancer (PCa) and benign prostatic hyperplasia (BPH), and provide proteomic evidence for the early diagnosis of PCa.</p><p><b>METHODS</b>We used human cytokine array to determine the profiles of the serum cytokines obtained from 6 PCa and 6 BPH patients with the PSA level within the grey scale of 4 - 10 ng/ml.</p><p><b>RESULTS</b>We identified 19 differentially expressed cytokines in the PCa patients, 16 obviously up-regulated, including IL-3, IL-6 and IL-16, and 3 markedly down-regulated, which were Fas/TNFRSF6, TRALR-3 and IGFBP-6. Most of them were involved in such cellular bioprocesses as transcription, proliferation, signal transduction, and apoptosis.</p><p><b>CONCLUSION</b>The cytokine antibody assay permits simultaneous measurement of multiple markers in a small volume of serum, and can identify a panel of key cytokines related to the malignant biological behavior of cancer cells. And it helps to find the biomarkers for the early diagnosis, efficacy assessment and prognosis of prostate cancer.</p>

Different plasma levels of interleukins and chemokines: comparison between children and adults with AIDS in China / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>The immunological differences between children and adults with AIDS in China are not well documented. Th1/Th2 cytokines and chemokines are two types of immune factors intimately involved in disease progression of HIV-1 infection. This study aimed to identify changes in plasma levels of Th1/Th2 cytokines inerleukin (IL)-18, IL-16, IL-10 and chemokines regulated on activation, normal T cell expressed and secreted (RANTES), stromal cell-derived factor-1 (SDF-1) and monocyte chemoattractant protein-1 (MCP-1) in HIV-1-infected children and adults in China.</p><p><b>METHODS</b>Seventy-five children with AIDS and 35 adult AIDS patients were recruited and clinical data were collected. CD4(+) T lymphocyte counts were measured by flow cytometery and plasma HIV RNA levels were measured by quantitative RT-PCR. Plasma levels of IL-18, IL-10, IL-16, RANTES, MCP-1, SDF-1alpha and SDF-1beta were quantified by enzyme-linked immunosorbent assay. The levels of beta2-microglobulin (beta2-MG) and soluble Fas (sFas) were measured to validate the level of humoral and cellular immune activation.</p><p><b>RESULTS</b>The mean levels of all cytokines in pediatric and adult AIDS patients were significantly higher than in their healthy controls (P < 0.01). The mean levels of these cytokines were higher in pediatric patients than in adult patients (P < 0.05, except for SDF-1alpha and beta2-MG). Some of the cytokine levels in patients younger than 6 years old was higher than in older children and adults with AIDS (IL-10, IL-18, SDF-1alpha, MCP, RANTES and sFas, P < 0.05). Levels of IL-18, IL-10, RANTES and beta2-MG of pediatric patients increased as the levels of viral load increased (P < 0.05).</p><p><b>CONCLUSIONS</b>Abnormal immune activation can be measured in Chinese pediatric and adult patients with AIDS, and is higher in children than in adult patients. The cytokines levels coincide with disease progression of AIDS, but have no direct relationship with total CD4(+) T cell count.</p>

IL-17 induces the production of IL-16 in rheumatoid arthritis

The purpose of this study was to investigate the expression of IL-16 in the rheumatoid synovium and the role of inflammatory cytokines and Toll-like receptor (TLR) ligands in IL-16 production by fibroblast- like synoviocytes (FLS) of rheumatoid arthritis (RA) patients. Immunohistochemical staining was performed with a monoclonal antibody to IL-16 in synovial tissues from patients with RA and likewise in patients with osteoarthritis (OA). FLS were isolated from RA synovial tissues and stimulated with IL-15, IL-1beta, IFN-gamma, and IL-17. The IL-16 mRNA level was assessed by semiquantitative RT-PCR and real time (RT) PCR and a comparison was made between IL-16 mRNA levels produced by RA-FLS and OA-FLS. Production of IL-16 was identified by a western blot assay, and IL-16 production after stimulation by specific ligands of TLR2 and TLR4 was assessed by RT-PCR. While immunohistochemical staining demonstrated strong expression of IL-16 mRNA in synovial tissues from patients with RA, similar findings were not present in the OA group. Moreover, mRNA expression of IL-16 by RA-FLS increased after treatment with IL-17 but not with IL-15, IL-1beta, and IFN-gamma. Specifically, IL-17 increased IL-16 mRNA level by RA-FLS and peripheral blood mononuclear cells in a dose-dependent manner. However, IL-17 did not stimulate IL-16 production in OA-FLS. Peptidoglycan, a selective TLR2 ligand, also increased production of IL-16 by RA-FLS dose- dependently, whereas LPS, a selective TLR4 ligand, had no such stimulatory effect. The results from our data demonstrate that IL-17 and TLR2 ligands stimulate the production of IL-16 by RA-FLS.

The expression of serum IL-10,12,13,16 in patients with allergic rhinitis and vasomotor rhinitis / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To study the role of serum IL-10, 12, 13, 16 in patients with allergic rhinitis and vasomotor rhinitis.@*METHOD@#The serum levels of IL-10, 12, 13, 16 were measured by ELISA in 30 cases of allergic rhinitis, 25 cases of vasomotor rhinitis and 20 healthy people.@*RESULT@#The level of IL-12 in allergic rhinitis was (170.33 +/- 90.58) ng/L, which was significantly lower than that of normal controls [(376.69 +/- 140.70) ng/L, P < 0.01]. The levels of IL-13 and IL-16 in allergic rhinitis were (408.51 +/- 189.68) ng/L and (151.53 +/- 63.56) ng/L, which were significantly higher than those of normal controls [(151.92 +/- 85.08) ng/L, (60.65 +/- 32.45) ng/L, P < 0.01]. There were no significant difference of levels of IL-10, 13, 16 between vasomotor rhinitis and normal controls, while the level of IL-12 in vasomotor rhinitis was lower than that of normal controls [(196.03 +/- 96.31) ng/L vs. (376.69 +/- 140.70) ng/L, P < 0.01]. It was suggested that IL-10 had positive correlation with IL-12 (r = 0.73, P < 0.01), and IL-13 had positive correlation with IL-16 (r = 0.94, P < 0.01).@*CONCLUSION@#The imbalance of IL-12, IL-13 and IL-16 play crucial roles of regulation in the onset and developing of allergic rhinitis. Further research is needed on the role of IL-12 in vasomotor rhinitis.

Serum interleukin-16 level in systemic lupus erythematosus

To detect serum interleukin-16 level in patients with systemic lupus erythematosus and to find out its correlation with disease activity. The study included 30 female patients with systemic lupus erythematosus. 20 apparently healthy females with matched age represent the control group. All patients subjected to full history taking, thorough clinical assessment of disease activity using SLE Disease Activity Index [SLEDAI] serum level of IL-16 mere examined using an enzyme-linked immunosorbent assay [ELISA]. Serum level of interleukin-16 [IL-16] was significantly increased in patients with systemic lupus erythematosus compared to controls and there was a significant positive correlation between IL-16 levels and disease activity assessed by the SLEDAI score. Circulating IL-16 levels are high in SLE patients and are correlated with the disease activity so serum level of IL-16 can be used as a useful indicator of SLE disease activity

Association between the polymorphisms of IL-4 gene promoter [-590C>T], IL-13 coding region [R130Q] and IL-16 gene promoter [-295T>C] and allergic asthma

Allergic asthma is a multifactorial disease, influenced by genetic and environmental factors. Recent family-based studies have revealed evidence for linkage of human chromosomes 5q31-33, 12ql5-24, Ilql3 and 15q23.6 as regions likely to contain genes related to asthma. Among the candidate genes in these regions are the genes encoding for human interleukin-4, interleukin-13 and interleukin-16. To evaluate this linkage, we examined an Iranian population of patients with asthma. A total of 30 patients with allergic asthma and 50 normal subjects were studied. Allergic asthma was confirmed using skin prick test and spirometry. DNA was extracted from blood cells and IL-4 [-590C>T], IL-13 [R130Q] and IL-16 [-295T>C] polymorphisms were determined by PCR-RFLP method. Out of 30 patients with allergic asthma, the following genotypes for IL-4, IL-13 and IL-16 cytokines were found: IL-4 genotypes consisted of 17 [56.7%] CC, 8 [26.7%] CT and 5 [16.7%] TT; IL-13 genotypes consisted of 11 [36.7%] GG, 13 [43.3%] GA and 6 [20%] AA; IL-16 genotypes consisted of 23 [76.7%] TT and 7 [23.3%] CT. No patient showed CC genotype for IL-16. A higher proportion of case subjects with the C allele for the IL-4, G allele for the IL-13 and T allele for the IL-16 polymorphisms was found compared with the T, A and C alleles, respectively. These results suggest an influence of genetic variability at the promoter of IL-4 gene [-590C>T] and a coding region of IL-13 gene [R130Q] on the occurrence of allergic asthma and no relationship between IL-16 promoter polymorphism [-295T>C] and this disease

Correlation of serum IL-16, IL-18 levels and immunoglobulins in children with asthma / 中国当代儿科杂志

<p><b>OBJECTIVE</b>This study examined the changes of serum levels of interleukin (IL)-16, IL-18 and immunoglobulins and the correlation of serum IL-16, IL-18 levels and immunoglobulins in children with asthma and aimed to explore the role of IL-16, IL-18 and immunoglobulins in the pathogenesis of asthma.</p><p><b>METHODS</b>Thirty-four children with asthma and 21 age and gender-matched healthy children were enrolled in this study. The levels of IL-16, IL-18 and immunoglobulin E (IgE) were determined using ELISA. Immunoglobulin G (IgG), immunoglobulin M (IgM) and immunoglobulin A (IgA) were detected by immunoturbidimetry.</p><p><b>RESULTS</b>The levels of IL-16, IL-18 and IgE in patients with asthma at both acute attack and convalescence stages were significantly higher than those in healthy controls. An increased IgG and a decreased IgA levels were found in asthmatic patients at the acute attack stage. There was a positive correlation between the IL-16 and IL-18 levels at both acute attack and convalescence stages of asthma (r=0.70, P < 0.01; r=0.70, P < 0.05). The IL-16 level correlated positively with the IgE level at acute attack stage of asthma (r=0.624, P < 0.01).</p><p><b>CONCLUSIONS</b>IL-16, IL-18 and IgE may be involved in the pathogenesis of asthma. The immunologic imbalance exists in children with asthma at both acute attack and convalescence stages. Anti-allergic therapy should be administered through the acute attack to the convalescence stages of asthma.</p>

Circulating Levels of IFN-gamma, IL-10 and IL-16 in Patients with Alopecia Areata / 대한피부과학회지

BACKGROUND: Alopecia areata (AA) is an autoimmune condition of the hair follicle, resulting in bald patches. The details of the pathogenesis of AA still remain unclear. However, several recent studies have indicated that AA is an organ-specific autoimmune disease in which T cells (especially CD8+T cells), as well as certain cytokines (especially Th1 cytokines, IL-1, IFN-gamma, and TNF-alpha) may play an important role in its development. OBJECTIVE: The purpose of this study was to characterize the cytokine response in the peripheral blood of patients with AA, before and after treatment. METHODS: Twenty one active AA patients and 10 healthy people were evaluated in this study. The levels of 3 cytokines, including IFN-gamma, IL-10, and IL-16, in all subjects were measured at the first visit and 3 months after treatment. RESULTS: The levels of IFN-gamma, IL-10, and IL-16 in the AA group were significantly elevated (p75%), and was decreased in comparision to the level before treatment (p=0.003). There was no difference in the cytokine levels after PUVA, DPCP, or a combination therapy of PUVA and DPCP (p>0.05). CONCLUSION: The results suggest the involvement of IFN-gamma in the AA process. Also, IFN-gamma could be a potential marker for treatment. Even though different treatments have different mechanisms, IFN-gamma is considered to be a common pathway for alopecia areata treatment.

Determination of interleukine-16 levels in peritoneal fluid and serum of women with endometriosis / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To investigate the role of interleukine-16 (IL-16) in the pathogenesis of endometriosis.</p><p><b>METHODS</b>Enzyme-linked immunosorbent assay (ELISA) was used to determine the levels of IL-16 in peritoneal fluid and serum specimens of 22 women with different stage endometriosis and 22 controls.</p><p><b>RESULTS</b>The median levels of IL-16 in peritoneal fluid and serum were 290.5 pg/ml and 539.4 pg/ml in women with endometriosis, and 296.6 pg/ml and 778.1 pg/ml in controls, respectively; there was no significant difference between two groups (P>0.05). However, the IL-16 levels in peritoneal fluid and serum of patients with minimal/mild stage endometriosis and controls were all significantly higher than those of patients with moderate/severe endometriosis (P<0.01, <0.05). In addition, there was no statistical correlation of peritoneal IL-16 levels with those in serum (P>0.05).</p><p><b>CONCLUSION</b>Reduced levels of IL-16 in peritoneal fluid and serum of women with advanced stage endometriosis may imply a role of IL-16 in the development and progression of endometriosis.</p>

role of interleukin 16 in the immunopathogenesis of rheumatoid arthritis

Rheumatoid Arthritis [RA] is a chronic inflammatory disease characterized by hyperplasia of the synovium and excessive cellular infiltration, which leads to progressive joint destruction. We analyzed, interleukin 16 [IL16], in relation to disease activity to characterize its biologic function in RA. Secreted IL-16 was measured by enzyme immunoassay in sera from 30 RA patients and 30 healthy controls [HC], and also in synovial fluid [SF] from 16 RA patients and 15 patients with non-RA synovitis as controls. IL-16 expression in peripheral blood mononuclear cells [PBMC] was characterized by flow cytometric analysis after intracellular cytokine staining for IL-16. In synovial tissue specimens, both were done: Immunohistochemistry for localization of IL-16, and histopathology, in which the tissue scored semiquantitatively for synovial hyperplasia and cellular infiltration. IL-16 was detected at significantly higher levels in sera and SF of RA patients in comparison to HC and non-RA synovitis [p<0.001 and p<0.0001 respectively]. Also, IL-16 was detected significantly higher in SF in comparison to sera in RA patients [p<0.001]. Flow cytometry of PBMC showed that a great proportion of both CD4+ and CD8+ cells expressed IL-16 protein. Also, immunohistochemistry revealed more CD4+ and less frequency of CD8+ cells in synovial infiltration. A significant correlation between IL-16 expression and local inflammatory activity could not be established [p>0.21] by microscopic analysis of the synovial cells infiltrate. In addition, no significant association was observed between serum, SF, and synovial tissue expression of IL-16 and clinical disease activity in RA [p>0.61, p>0.5 and p>0.42 respectively]. This indicated that, IL-16 played a regulatory rather than a proin-flammatory role in the immunopathogenesis of RA