Rapid clearance of erythrodermic psoriasis with apremilast.

Cell Type–Dependent Pro- and Anti-Inflammatory Role of Signal Transducer and Activator of Transcription 3 in Alcoholic Liver Injury

Nonalcoholic fatty liver disease (NAFLD), the major reason for abnormal liver function in the Western world, is associated with obesity and diabetes and is characterized by insulin resistance (IR). IR is regulated by mediators released from cells of the immune system or adipocytes and proinflammatory cytokines such as tumor necrosis factor-α (TNFα). The importance of TNFα in human and animal fatty liver diseases, both caused by genetic manipulation and overnutrition, has been shown convincingly. Furthermore, neutralization of TNFα activity improves IR and fatty liver disease in animals. Adiponectin is a potent TNFα-neutralizing and anti-inflammatory adipokine and in vitro and experimental animal studies have proven the importance of this mediator in counteracting inflammation and IR. Anti-inflammatory effects of adiponectin are exerted both by suppressing TNFα synthesis and by induction of anti-inflammatory cytokines such as interleukin-10 or interleukin-1–receptor antagonist. Therefore, the balance between various mediators, either derived from the immune system or adipose tissue, appears to play an important role in hepatic and systemic insulin action and in the development of fatty liver disease.

Intestinal infections are associated with Gram-negative bacteria like Escherichia coli. When eliminated by treatments during replication, E. coli release lipopolysaccharides (LPS) that can activate the intestinal immune system and increase the expression of cytokines, such as interleukin (IL)-8, IL-18, tumor necrosis factor-alpha (TNF-α), and interferon-gamma (IFN-γ), by the intestinal epithelium under pathological conditions. This study aimed to evaluate the addition of Bacillus subtilis to the duodenal gene expression of pro-inflammatory and anti-inflammatory cytokines in broilers exposed to LPS from E. coli. RNA was extracted using the Zymo Research total RNA commercial kit, according to the manufacturer's specifications, from the intestinal tissue of the duodenum previously resuspended in the lysis buffer of the kit. The expression of the cytokines of interest was measured using the QuantiNova SYBR green real-time polymerase chain reaction kit (Qiagen). Transcript quantification was performed by the ΔΔC(t) method using glyceraldehyde 3-phosphate dehydrogenase as a normalizing constitutive gene. For the measurement of pro-inflammatory (IL-8, IL-18, TNF-α, and IFN-γ) and anti-inflammatory (IL-10) cytokines, there was no statistically significant difference (p > 0.05) between the basal diet and the diet with antibiotic (avilamycin). There was a statistical difference (p < 0.05) between diets with LPS. The diet with B. subtilis presented the lowest expression; the results differed on each sampling day (days 14, 28, and 42). A decrease in the expression of pro-inflammatory cytokines (IL-8, IL-18, TNF-α, and IFN-γ) and an increase in IL-10 (anti-inflammatory) was observed; in this way, a balance of the inflammatory response to bacterial infection is achieved, suggesting that the use of B. subtilis as an additive in a broiler diet has a similar effect to that produced with antibiotic growth promoter.

The structure and function of the carotid body are greatly altered during chronic hypoxia. Recent studies showed the expression of interleukin (IL)-1 receptor and IL-6 receptor in the carotid body, suggesting a role of proinflammatory cytokines in the chemoreceptor function. The present study aimed to examine the hypothesis that the expression of pro-inflammatory cytokines, namely IL-1beta, IL-6 and tumor necrosis factor (TNF)alpha, plays a role in the rat carotid body in chronic hypoxia. Levels of the mRNA expression of the cytokines and their receptors IL-1r1, gp130 and TNFr1, were significantly increased in the carotid body of hypoxic rats when compared with the normoxic control. Immunohistochemistry showed that the expressions of cytokines and receptors were localized in the lobules of chemosensitive glomus cells containing tyrosine hydroxylase. There were significantly more positive-staining cells in the hypoxic groups with treatment for 3, 7 and 28 days than those of the normoxic controls. Application of exogenous cytokines (0.1 nM) elevated intracellular calcium ([Ca(2+)](i)) responses to acute hypoxia in the dissociated fura-2-loaded glomus cells. The increased [Ca(2+)](i) response in the hypoxic group was significantly greater than that of the normoxic group. Moreover, the gene transcripts of inflammatory mediator inducible nitric oxide synthase and chemokines (MCP-1, CCR2, MIP-1alpha, and ICAM-1) were increased in the carotid body of hypoxic rats. Collectively, results suggest that the increased expressions of proinflammatory cytokines play a functional role in the carotid body with local inflammation during chronic hypoxia.

To explore the effects of urantide, a urotensin II receptor (UT) inhibitor, on lipopolysaccharide (LPS)/D-galactosamine (D-GalN)-induced acute hepatocyte apoptosis in mice. Male BALB/c mice were randomly divided into 4 groups (n = 6 each): normal control, pre-treatment control, model and pre-treatment model. The pre-treatment control and pre-treatment model groups received urantide (0.6 mg/kg body weight) by a caudal vein injection. At 30 minutes post-injection, the model and pre-treatment model groups were treated with LPS/D-GalN to induce acute hepatocyte apoptosis via an intraperitoneal injection. Hepatocyte apoptosis was examined by terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling (TUNEL) and caspase-3 colorimetric assay. The expressions of proinflammatory cytokines, such as tumor necrosis factor alpha (TNF-α), interferon-γ (IFN-γ) and interleukin-1 beta (IL-1β), were detected by reverse transcription-polymerase chain reaction (RT-PCR) and enzyme-linked immunosorbent assay. Massive hepatocyte apoptosis were detected in the model group. The apoptotic index was clearly reduced in the pre-treatment model group [(26 ± 11)% vs (77 ± 20)%, P < 0.01]. And the activity of caspase-3 was also lower in the pre-treatment model group than that in the model group [(2.50 ± 0.83) pmol · min(-1) · mg(-1) vs (3.76 ± 0.42) pmol · min(-1) · mg(-1), P < 0.01]. In addition, the serum and liver tissue levels of TNF-α, IL-1β and IFN-γ in the pre-treatment model group were significantly lower than those in the model group[1.69 ± 0.47 vs 3.57 ± 0.79, 0.31 ± 0.02 vs 0.46 ± 0.06, 2.81 ± 0.72 vs 3.35 ± 0.84, (233 ± 36) pg/ml vs (441 ± 157) pg/ml, (228 ± 21) pg/ml vs (364 ± 20) pg/ml, (93.8 ± 5.2) pg/ml vs (180.3 ± 4.3) pg/ml, all P < 0.01]. LPS/D-GalN-induced acute hepatocyte apoptosis can be inhibited by a pretreatment of urantide through an inhibition of expression and secretion of proinflammatory cytokines. The UII/UT receptor system plays a pivotal role in the liver immuno-inflammatory injury of acute liver failure (ALF). And it may become a new drug target of ALF therapy.

Enteropathogenic Escherichia coli (EPEC) produces attaching and effacing (A/E) lesions and watery diarrhea, both of which are intimin and EspA dependent. In this work, we explored the mucosal immune response by detecting cytokine induction in rabbits with diarrhea caused by rabbit EPEC (REPEC). Orally inoculated rabbits exhibited weight loss and mucosal inflammation, developed watery diarrhea, and died (day 7). At day 6 postinoculation, animals were analyzed for the induction of proinflammatory cytokines in enterocytes. The role of lymphocyte-dependent immunity was determined through the expression of proinflammatory cytokines by lymphocytes from Peyer's patches (PP) and the spleen. EspA and intimin mutants were used to explore the role of A/E lesions in the expression of these cytokines. REPEC-infected rabbit enterocytes showed increased interleukin 1beta (IL-1beta), IL-6, IL-8, and tumor necrosis factor alpha (TNF-alpha) mRNA expression, but that of anti-inflammatory IL-10 was increased only slightly. In contrast, intimin mutant-infected rabbits were unable to produce this proinflammatory cytokine profile but did produce a remarkable increase in IL-10 expression. Bacteria lacking EspA increased the expression of IL-8 and TNF-alpha, but that of IL-10 was increased only slightly. PP lymphocytes also produced proinflammatory cytokines, which were dependent on EspA (except for TNF-alpha) and intimin, while IL-10 was induced by EspA and intimin mutants. In contrast, spleen lymphocytes (systemic compartment) were unable to produce IL-1beta and TNF-alpha. These data show the importance of the proinflammatory cytokines secreted by enterocytes and those expressed locally by PP lymphocytes, which can activate effector mechanisms at the epithelium. Furthermore, this cytokine profile, including IL-6 and IL-1beta, which may be involved in the diarrhea produced by EPEC, depends on intimin.

The Systemic Inflammatory Response to Cardiopulmonary Bypass

Blastocystis is a common enteric protistan parasite that can cause acute, as well as chronic, infection and is associated with irritable bowel syndrome (IBS). However, the pathogenic status of Blastocystis infection remains unclear. In this study, we found that Blastocystis antigens induced abundant expression of proinflammatory cytokines, including interleukin 1β (IL-1β), IL-6, and tumor necrosis factor alpha (TNF-α), in mouse intestinal explants, in mouse colitis colon, and in macrophages. Further investigation utilizing RAW264.7 murine macrophages showed that Blastocystis treatment in RAW264.7 macrophages induced the activation of ERK, JNK, and p38, the three major groups of mammalian mitogen-activated protein (MAP) kinases that play essential roles in the expression of proinflammatory cytokines. ERK inhibition in macrophages significantly suppressed both mRNA and protein expression of IL-6 and TNF-α and mRNA expression of IL-1β. On the other hand, JNK inhibition resulted in reductions in both c-Jun and ERK activation and significant suppression of all three proinflammatory cytokines at both the mRNA and protein levels. Inhibition of p38 suppressed only IL-6 protein expression with no effect on the expression of IL-1β and TNF-α. Furthermore, we found that serine proteases produced by Blastocystis play an important role in the induction of ERK activation and proinflammatory cytokine expression by macrophages. Our study thus demonstrated for the first time that Blastocystis could induce the expression of various proinflammatory cytokines via the activation of MAP kinases and that infection with Blastocystis may contribute to the pathogenesis of inflammatory intestinal diseases through the activation of inflammatory pathways in host immune cells, such as macrophages.

Tumor Necrosis Factor-α: A Multifaceted Mediator of Inflammation

PurposeGouty arthritis could be triggered by the deposition of monosodium uric acid (MSU) crystals. Palmatine (PAL), a protoberberine alkaloid, has been proven to possess compelling health-beneficial activities. In this study, we aimed to explore the effect of PAL on LPS plus MSU crystal-stimulated gouty arthritis in vitro and in vivo.MethodsPMA-differentiated THP-1 macrophages were primed with LPS and then stimulated with MSU crystal in the presence or absence of PAL. The expression of pro-inflammatory cytokines and oxidative stress-related biomarkers and signal pathway key targets were determined by ELISA kit, Western blot, immunohistochemistry and qRT-PCR, respectively. In addition, the anti-inflammatory and antioxidant activities of PAL on MSU-induced arthritis mice were also evaluated.ResultsThe results indicated that PAL (20, 40 and 80 μM) dose-dependently decreased the mRNA expression and levels of pro-inflammatory cytokines (interleukin-1beta (IL-1β), IL-6, IL-18 and tumor necrosis factor alpha (TNF-α)). The levels of superoxide dismutase (SOD) and glutathione (GSH) were remarkably enhanced, while the level of malondialdehyde (MDA) was reduced. Western blot analysis revealed that PAL appreciably inhibited NF-κB/NLRP3 signaling pathways through inhibiting the phosphorylation of p-65 and IκBα, blocking the expression of NLRP3, ASC, IL-1β and Caspase-1, as well as enhancing the antioxidant protein expression of Nrf2 and HO-1. In vivo, PAL attenuated MSU-induced inflammation in gouty arthritis, as evidenced by mitigating the joint swelling, and decreasing the productions of IL-1β, IL-6, IL-18, TNF-α and MDA, while enhancing the levels of SOD and GSH. Moreover, PAL further attenuated the infiltration of neutrophils into joint synovitis.ConclusionPAL protected against MSU-induced inflammation and oxidative stress via regulating the NF-κB/NLRP3 and Nrf2 pathways. PAL may represent a potential candidate for the treatment of gouty arthritis.

Targeting inflammatory mediators with ferulic acid, a dietary polyphenol, for the suppression of monosodium urate crystal-induced inflammation in rats

Tumor necrosis factor alpha and its soluble receptors in obese children with NAFLD

Eckol from Ecklonia cava ameliorates TNF-α/IFN-γ-induced inflammatory responses via regulating MAPKs and NF-κB signaling pathway in HaCaT cells

Psoriasis is a common, chronic inflammatory skin disease which typically follows a relapsing and remitting course, and is associated with joint disease in approximately 25% of patients.1 The significant reduction in quality of life and the psychosocial disability suffered by patients underline the need for prompt, effective treatment, and long-term disease control (reviewed2, 3). Localized, limited disease can usually be managed satisfactorily with topical agents. Those with moderate to severe disease often require systemic treatment. Phototherapy and traditional 'standard' systemic therapies, while often effective, can be associated with long-term toxicity; some are expensive, and some patients have treatment-resistant disease.4 Also, phototherapy is not available to many due to geographical, logistical or other constraints. Patients themselves demonstrate high levels of dissatisfaction with standard approaches to treatment.5, 6 Biologic therapies for psoriasis utilize molecules designed to block specific molecular steps important in the pathogenesis of psoriasis and now comprise a number of well-established, licensed, treatment options for patients with severe disease. Since 2005, when the British Association of Dermatologists (BAD) first published guidance on the use of biologic therapies in psoriasis,7 much has changed. There is a substantial body of new evidence pertinent to the clinical use of these treatments, the U.K. National Institute for Health and Clinical Excellence (NICE) has approved the use of a number of biologic therapies in severe chronic plaque psoriasis and the BAD Biologic Interventions Register (BADBIR) has been successfully launched. Despite these developments, use of biologic therapy in clinical practice remains limited in the U.K., with a shortfall in funding cited as a significant obstacle to prescribing in approximately 40% of units recently surveyed.8 These guidelines have been revised and updated in accordance with a predetermined scope. This is based on the original scope used in 2005, and extended to include additional areas of practice. Recommendations in this guideline supersede those in the 2005 guideline. The overall objective of these guidelines is to provide up-to-date, evidence-based recommendations on use of biologic therapies (infliximab, adalimumab, etanercept, ustekinumab) in adults and children with all types of psoriasis and, where relevant, psoriatic arthritis, for clinical staff involved in the care of patients treated with biologic therapies. Efalizumab remains in the scope of the guideline in relation to safety only, given that the European Medicines Agency has withdrawn the marketing authorization of this drug because of concerns over the development of progressive multifocal leukoencephalopathy (PML). This guidance does not cover agents licensed outside the U.K. (alefacept) or use of biologic therapies for indications other than psoriasis and psoriatic arthritis. The guideline working group represents all relevant stakeholders including dermatologists, nurses, rheumatologists and patients. Draft guidance was made available for consultation and review by patients, the BAD membership and the British Dermatological Nursing Group (BDNG). Advice relating to tuberculosis was reviewed and approved by the British Thoracic Society. The guideline has been developed using the BAD's recommended methodology9 and with reference to the AGREE (Appraisal of Guidelines Research and Evaluation) instrument.10 Recommendations were developed for implementation in the National Health Service using a process of considered judgment based on the evidence and an awareness of the European product licence of the various treatments. Cochrane, EMBASE and Medline databases were searched between 1990 and June 2009 for clinical trials involving adalimumab, efalizumab, etanercept, infliximab and ustekinumab using an agreed protocol. Two reviewers screened all titles and abstracts independently, and full papers of relevant material were obtained. In relation to efficacy, only randomized controlled trials (RCTs) of high quality (1+ or more; see Appendix 1) were included for chronic plaque psoriasis, whereas in other clinical phenotypes, given the paucity of published data, all data were included. Data from each paper were extracted by two members of the guideline group using standardized literature evaluation forms in order to create evidence tables. Evidence on safety was extracted from literature on use of biologic agents for any indication in view of the relatively limited data specifically relating to use in psoriasis. The methodological limitations of the safety analysis are detailed in section 15. The guideline was peer reviewed by the Clinical Standards Unit of the BAD (made up of the Therapy & Guidelines and Audit & Clinical Standards Subcommittees) prior to publication. These guidelines have been prepared on behalf of the BAD and reflect the best data available at the time the report was prepared. Caution should be exercised in interpreting the data; the results of future studies may require alteration of the conclusions or recommendations in this report. It may be necessary or even desirable to depart from the guidelines in the interests of specific patients and special circumstances. Just as adherence to guidelines may not constitute defence against a claim of negligence, so deviation from them should not necessarily be deemed negligent. This field of psoriasis biologic therapeutics is in a rapid phase of development, and revision of the scope and content of the guidelines will therefore occur on an annual basis. Where necessary, the guideline will be updated via the BAD website, and a fully revised version is planned for 2012. Most patients with moderate to severe disease achieve satisfactory disease control (i.e. significant or complete clearing of disease) in the short term with at least one of the systemic agents currently available.4 Long-term disease control frequently requires some form of continuous therapy and consequent, predictable risks of toxicity. At present, the risks and benefits of biologic therapies relative to standard systemic therapy are largely unknown. Widespread use of these agents in uncomplicated moderate to severe psoriasis is inappropriate and is not supported by the licensed indications for these drugs. Eligibility criteria should encompass both objective measures of disease severity and the impact the disease has on quality of life. All existing disease severity assessment tools are imperfect11-13 and most require some training to complete. The Psoriasis Area and Severity Index (PASI) is a measure of disease severity in chronic plaque psoriasis12 and has been chosen for the purposes of this guideline as it has been widely used in clinical trials including those investigating biologic therapies, and has also been adopted by NICE. A PASI score of ≥ 10 (range 0–72) has been shown to correlate with a number of indicators commonly associated with severe disease such as need for hospital admission or use of systemic therapy,14 and reflects the minimal level of disease severity required for patient inclusion in most of the clinical trials of biologic therapies to date. Where the PASI is not applicable (e.g. pustular psoriasis), body surface area (BSA) affected should be used, with severe disease defined as > 10% BSA affected.14 The Dermatology Life Quality Index (DLQI) is a validated tool for the measurement of quality of life across all skin diseases, including psoriasis, and has been used in both trial and clinical practice settings.13, 15 A score of > 10 (range 0–30) has been shown to correlate with at least 'a very large effect' on an individual's quality of life.12, 14, 16 When using the PASI and DLQI to determine whether or not a patient should be considered for biologic therapy, clinicians should take into account the applicability of these measures to each individual patient. There are circumstances where the use of these tools fails to give a sufficiently accurate assessment of the clinical situation. With respect to the PASI, this is especially pertinent in patients with localized disease that involves special 'high-impact' sites (genitalia, hands, feet, head and neck) where highly significant functional and/or psychosocial morbidity may exist with a PASI < 10. The DLQI may be a poor indicator of emotional disabilities resulting from psoriasis and the validity of the DLQI (and of other quality of life measures) may also be undermined due to linguistic or other communication difficulties.13 Patients with psoriasis may be considered eligible to receive treatment with any of the licensed biologic interventions when they fulfil the eligibility criteria set out below. However, the decision to proceed with treatment must be made in collaboration with the patient and include a careful assessment of the associated risks and benefits17 Eligibility criteria To be considered eligible for treatment, patients must have severe disease as defined in (a) and fulfil one of the clinical categories outlined in (b): (a) Severe disease defined as a PASI score of 10 or more (or a BSA of 10% or greater where PASI is not applicable) and a DLQI > 10. In exceptional circumstances (for example, disease affecting high-impact sites with associated significant functional or psychological morbidity such as acral psoriasis), patients with severe disease may fall outside this definition but should be considered for treatment (Strength of recommendation D; level of evidence 3) AND (b) Fulfil at least one of the following clinical categories (Strength of recommendation D; level of evidence 3, and formal consensus) where phototherapya and alternative standard systemic therapyb are contraindicated or cannot be used due to the development of, or risk of developing, clinically important treatment-related toxicity. are intolerant to standard systemic therapy are unresponsive to standard systemic therapyb have significant, coexistent, unrelated comorbidity which precludes use of systemic agents such as ciclosporin or methotrexate have severe, unstable, life-threatening disease Eligibility criteria for patients with skin and joint disease patients with active psoriatic arthritis or skin disease that fulfils defined British Society for Rheumatology (BSR)18 or BAD guideline criteria, respectively patients with severe skin psoriasis and psoriatic arthritis who have failed or cannot use methotrexate may need to be considered for biologic treatment given the potential benefit of such treatment on both components of psoriatic disease aPhototherapy may be inappropriate in patients (i) who have exceeded safe exposure limits (150–200 treatments for PUVA, 350 treatments for narrowband UVB19, 20), (ii) who are nonresponsive or relapse rapidly, (iii) who have a history of skin cancer or repeated episodes of severe sunburn, (iv) who are intolerant of UV exposure, especially if skin phototype I (sun-sensitive), or (v) for logistical reasons bStandard systemic therapy includes ciclosporin (2·5 mg kg−1 daily; up to 5 mg kg−1 daily), and in men, and women not at risk of pregnancy, methotrexate [single dose (oral, subcutaneous, intramuscular) of 15 mg weekly; max 25 mg weekly] and acitretin (25–50 mg daily) An adequate response to treatment is defined as either (i) a 50% or greater reduction in baseline PASI (PASI 50 response) (or % BSA where the PASI is not applicable) and a 5-point or greater improvement in DLQI4, 21-23or (ii) a 75% reduction in PASI score compared with baseline (PASI 75 response). Initial response to therapy should be assessed at time points appropriate for the drug in question (Table 1). For patients on tumour necrosis factor (TNF) antagonist treatment with psoriasis and psoriatic arthritis, treatment may be continued if there has been a sufficient response in at least one of these components (see BSR guidelines18 for definition of disease response in psoriatic arthritis). TNF is a proinflammatory cytokine produced by a wide variety of cell types including keratinocytes. It plays a central role in the pathogenesis of psoriasis, psoriatic arthritis and a number of other disease states. TNF is released from cells as a soluble cytokine (sTNF) following cleavage from its cell surface-bound precursor (transmembrane TNF, tmTNF). Both sTNF and tmTNF are biologically active, and bind to either of two distinct receptors: TNF receptor 1 (TNFR1, p55) and TNF receptor 2 (TNFR2, p75). This leads to NF-κB activation (which promotes inflammation) and/or cell apoptosis. In addition, tmTNF can itself act as a ligand (via a process of reverse signalling) to induce cell activation, cytokine suppression or apoptosis of the tmTNF-bearing cell. Soluble forms of the TNF receptors also exist and, by binding and neutralizing sTNF, may act as natural TNF antagonists. There are currently two approved groups of biologic agents that target TNF: anti-TNF monoclonal antibodies (adalimumab and infliximab), and sTNF receptors (etanercept). Infliximab is a chimeric human–murine monoclonal antibody (∼ 25% mouse-derived protein) whereas adalimumab is fully human. Etanercept is a genetically engineered fusion protein composed of a dimer of the extracellular portions of human TNFR2 (p75) fused to the Fc domain of human IgG1. All three agents specifically bind both soluble and transmembrane forms of TNF and act by (i) blocking TNFR-mediated mechanisms and (ii) inducing tmTNF (reverse-signalling) events. Etanercept also binds members of the lymphotoxin family [LTα3 (also known as TNF-β) and LTα2β1] although the biological significance of this is unclear. Aside from the latter, there are important differences between the three agents with respect to pharmacokinetics, immunogenicity and structure-based mechanisms of action (only some of which are completely understood).24 It is likely that these differences, in the context of the highly complex biology of TNF, account for observed differences in the efficacy and adverse events profile of TNF antagonists. Lymphocyte function-associated antigen-1 (LFA-1) is a cell surface protein that binds to intracellular adhesion molecule (ICAM) 1–3 and plays a key role in T-lymphocyte recirculation, trafficking to sites of inflammation, antigen presentation by dendritic cells and other activated cells including keratinocytes, and T-cell costimulation. Efalizumab is a recombinant humanized IgG1 monoclonal antibody that binds specifically to the CD11a subunit of LFA-1, which by interfering with LFA-1/ICAM binding inhibits several key steps important in the pathogenesis of psoriasis including T-cell migration into the skin and T-cell activation. More recently, in vivo data have shown that efalizumab induces a state of reversible T-cell 'hyporesponsiveness' including downregulation of a number of T-cell surface molecules unrelated to LFA-1 both in the circulation and in psoriatic plaques.25, 26 Interleukin (IL)-12 and IL-23 are heterodimeric cytokines secreted by activated antigen-presenting cells, and share a common protein subunit, p40. Of relevance to psoriasis, IL-12 activates CD4 and natural killer cells to induce expression of type 1 cytokines (TNF and interferon-γ) while IL-23 stimulates survival and proliferation of a subset of T cells that produce IL-17 (Th17 cells). Recent immunological27 and genetic studies indicate a central role for IL-23 in the pathogenesis of psoriasis.28Ustekinumab is a fully human IgG1κ monoclonal antibody which acts as an IL inhibitor by binding with high affinity and specificity to the p40 protein subunit. It thus prevents IL-12 and IL-23 from binding to their IL-12Rβ1 receptor protein expressed on the surface of immune cells. Three large RCTs demonstrate that etanercept is effective in chronic plaque psoriasis.29-31 Onset of action is slower than that seen with the monoclonal antibodies, with clinically significant improvement in disease severity scores evident between 4 and 8 weeks after initiation of treatment.30 Response is dose related, with 34% (25 mg biweekly) and 48% (50 mg biweekly) of patients achieving PASI 75 by 12 weeks (Table 2). Continuing therapy up to 6 months improves response rates further (43% and 57% for 25 mg biweekly and 50 mg biweekly, respectively).29, 30, 32 While there are no RCT data establishing efficacy beyond 6 months, data from a 2-year, open-label etanercept 50 mg biweekly extension study32 (following the phase III study reported by Tyring et al.31) suggest that efficacy is maintained for up to 1 year, with approximately 75% of patients maintaining their PASI 75 response over the ensuing year. Overall, continuous therapy provides better disease control and higher levels of patient satisfaction compared with interrupted therapy. When treatment is stopped, disease relapses slowly: median time to disease relapse as defined by loss of PASI 50 in those who achieved PASI 75 after 24 weeks of continuous etanercept 25 or 50 mg biweekly, was 85 and 91 days, with no evidence of disease PASI scores were with the of patients achieving efficacy after 12 further weeks (i.e. and of PASI 75 achieved this level of efficacy on Aside from objective measures of disease improvement studies also report associated clinically in quality of life reduction in and and of patients in analysis of two of these RCTs that response rates in those over were the as those although in the group were The 25 mg and 50 mg are given that their are that the number of patients achieving PASI 75 at 12 weeks following etanercept 50 mg an RCT compared with was with that seen in other RCTs investigating etanercept 25 mg biweekly and that no significant differences were observed in PASI or DLQI in a of patients open-label etanercept 25 mg biweekly and etanercept 50 mg In the RCTs the of adverse events or adverse events in patients etanercept was no greater than in the control patients, with the of in each treatment RCT has shown efficacy of etanercept 25 mg compared with acitretin mg kg−1 at 24 weeks (see the role of TNF in levels of TNF in patients, and the used for etanercept, response rates may occur in patients, with This is in by published RCT and data cited in the study by et The of etanercept and methotrexate has been shown to be more effective in arthritis than either with no significant additional toxicity. data suggest that the of methotrexate may also etanercept efficacy in psoriasis. A RCT the efficacy and safety of etanercept (25 mg biweekly) in patients on and reported of patients or at 24 weeks on therapy, as compared with those in methotrexate was A reported both efficacy with the of methotrexate in patients on etanercept and loss of efficacy on of methotrexate from patients on Data from a RCT reported that the of etanercept 25 mg with acitretin mg kg−1 is as effective as etanercept 25 mg and that both these interventions are more effective that acitretin These data suggest that in the short term at the may additional efficacy as there is no additional associated toxicity. The patient in the cited RCTs may not be of patients likely to be treated in clinical practice as to the studies required patients only to be considered or have or systemic therapy. However, objective disease severity criteria were the as those currently recommended by the BAD and and PASI scores on to studies were higher from 16 to studies of practice report response rates in patients who have failed systemic therapies, all of which that data from the RCTs can be to clinical 50 There is a of long-term RCT data beyond 6 months, and only limited data on the two published studies one is and both report following one of treatment RCT data indicate that 50 mg biweekly is more effective than 25 mg biweekly, but there are no trial data whether the dose to 50 mg biweekly in patients who to achieve or adequate on 25 mg biweekly results in disease This is especially pertinent given guidance which currently limits treatment to the 25 mg biweekly dose (see Etanercept is licensed for use in moderate to severe psoriasis at either 50 or 25 mg biweekly for the first months, and 25 mg biweekly for up to 24 therapy beyond 24 weeks may be appropriate for some patients has approved use of etanercept in severe plaque psoriasis to defined disease at the 25 mg biweekly dose only, and not the 50 mg dose effective, with therapy to be continued only in those patients achieving disease response at months (Table 1). Etanercept is recommended for the treatment of patients with severe psoriasis who fulfil the disease severity criteria to section (Strength of recommendation level of evidence Etanercept therapy may be at either 50 or 25 mg and disease response assessed at months (Strength of recommendation level of evidence The of which dose to use will on clinical disease body and, in the U.K., the dose that will be (Strength of recommendation level of evidence Patients on etanercept 25 mg may to to etanercept 50 mg as these two are in of efficacy (Strength of recommendation level of evidence In patients who treatment may be continued to clinical although long-term data on efficacy are limited to 2 (Strength of recommendation level of evidence may be risk of disease although there may be a response on therapy (Strength of recommendation level of evidence may be recommended in clinical where it is required for associated or to efficacy (Strength of recommendation level of evidence Three large indicate that infliximab therapy is highly effective in chronic plaque psoriasis (Table Onset of action is with evidence of significant improvement the first 2 weeks of treatment and benefit by 10 when of patients achieve PASI 75 (Table (and in DLQI of This response is largely maintained over time with and achieving PASI 75 at 6 and 12 months, respectively (Table 2). of efficacy with development of antibodies to which in of patients continuous therapy and 5 mg following a standard 2 and 6 continuous therapy at 5 mg kg−1 8 weeks achieved to relapse in the by loss of PASI was as and in the of although data were not An that 50% patients relapse of PASI by There are no published trial data beyond 1 year. study assessed disease using the Psoriasis Severity Index to a a improvement in from baseline was observed at 10 with a of improvement reported at This was maintained of patients with complete of disease the target continued to between weeks 24 and 50 and There are no RCT data on use of methotrexate in with infliximab in psoriasis. In both and psoriatic arthritis, with methotrexate is a licensed and response rates and are at least in these disease levels of infliximab have been reported with methotrexate which may in of mg also the of antibodies to The patient in the cited RCTs may not be of patients likely to be treated in clinical practice. The PASI at baseline was ≥ 10 in all the studies However, of systemic therapy was not an in that most studies required patients to be for systemic therapy and/or failed A of patients in the study by et indicate that baseline PASI > and the of treatments two or more systemic therapies, or biologic no on treatment The of the study investigating continuous infliximab therapy is in that study at patients randomized to receive therapy receive infliximab at PASI 75 was not and in both were reported as Infliximab is licensed for use mg kg−1 8 in moderate to severe plaque psoriasis. has approved use of infliximab in patients with severe (PASI ≥ DLQI ≥ with treatment beyond 10 weeks recommended only in those who achieve response Infliximab is recommended for the treatment of patients with severe psoriasis who fulfil the disease severity criteria to section (Strength of recommendation level of evidence Infliximab therapy should be at a dose of 5 mg kg−1 at weeks 2 and 6 and disease response assessed at months (Strength of recommendation level of evidence In patients who mg should be given at to disease control although long-term data are available only up to 1 (Strength of recommendation level of evidence therapy should be given the associated risk of and disease control (Strength of recommendation level of evidence may be recommended in clinical where it is required for associated to efficacy or to the development of antibodies to infliximab (Strength of recommendation D; level of evidence 3) Three large RCTs demonstrate that adalimumab is a highly effective treatment for chronic plaque psoriasis (Table Onset of action is with significant in disease severity evident 2 weeks of treatment and disease response seen between weeks 12 and Response is dose with of patients achieving PASI 75 at 12 with adalimumab mg other (i.e. the licensed dose for psoriasis), and achieving PASI 75 with adalimumab mg relevant in quality of life indicators are also In one a subset of patients who failed to achieve PASI 50 following at least 24 weeks of adalimumab other was to the dose for the of the study 40% of this PASI 50 that dose may further data are available up to 1 year, with no evidence of significant loss of response over time in those patients who and are continued on of response on treatment was also in the phase of the study reported by et those who maintained PASI 75 by were to receive either or a further weeks of adalimumab While time to relapse was not of patients PASI 50 response relative to baseline with a of a in PASI score relative to compared with relapse in those on adalimumab by of this patients who

Helicobacter pylori induces the expression of proinflammatory cytokines in vitro by activating nuclear factor-kappaB, a transcriptional regulator. However, it has not been clarified whether H. pylori-induced proinflammatory cytokines are also mediated through nuclear factor-kappaB in vivo. The aim of this study was to evaluate the role of nuclear factor-kappaB on the expressions of proinflammatory cytokines in H. pylori-infected mice. We evaluated nuclear factor-kappaB (p65) activation in the H. pylori-infected gastric mucosa of mice by immunofluorescent staining using antip65 polyclonal antibody, and the expressions of proinflammatory cytokines with inhibition of nuclear factor-kappaB pathway by using phosphorothioate antisense and sense oligonucleotide against the nuclear factor-kappaB (p65). In the H. pylori-infected gastric mucosa of mice, immunofluorescent staining using antip65 polyclonal antibody showed nuclear factor-kappaB (p65) activation, which was particularly localized to epithelial cells. Tumor necrosis factor-alpha and interleukin-1beta concentrations in gastric mucosa by enzyme-linked immunosorbent assay (ELISA) were elevated in the infected group versus the uninfected group. Pretreatment with nuclear factor-kappaB (p65) antisense oligonucleotide inhibited the activation of nuclear factor-kappaB and the expressions of tumor necrosis factor-alpha and interleukin-1beta in H. pylori-infected gastric mucosa. Sense oligonucleotide did not influence on the expression of proinflammatory cytokines. H. pylori infection was found to activate the expressions of proinflammatory cytokines via nuclear factor-kappaB in vivo, and this may play an important role in the initiation of H. pylori-induced gastric inflammation.