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https://www.readbyqxmd.com/read/28806642/circulating-follicular-helper-t-cells-presented-distinctively-different-responses-toward-bacterial-antigens-in-primary-biliary-cholangitis
#1
Zun-Qiang Zhou, Da-Nian Tong, Jiao Guan, Mei-Fang Li, Qi-Ming Feng, Min-Jie Zhou, Zheng-Yun Zhang
Primary biliary cholangitis (PBC) is a chronic and progressive cholestatic liver disease with unknown causes. The initiation of PBC is associated with bacterial infections and abnormal immune correlates, such as the presence of self-reactive anti-mitochondrial antibodies and shifted balance of T cell subsets. In particular, the CD4(+)CXCR5(+) follicular helper T (Tfh) cells are highly activated in PBC patients and are significantly associated with PBC severity, but the underlying reasons are unknown. In this study, we found that the circulating CD4(+)CXCR5(+) T cells were enriched with the interferon (IFN)-γ-secreting Th1-subtype and the interleukin (IL)-17-secreting Th17-subtype, but not the IL-4-secreting Th2 subtype...
August 11, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28797090/imidazoquinoxaline-anticancer-derivatives-and-imiquimod-interact-with-tubulin-characterization-of-molecular-microtubule-inhibiting-mechanisms-in-correlation-with-cytotoxicity
#2
Alexis Courbet, Nicole Bec, Caroline Constant, Christian Larroque, Martine Pugniere, Safia El Messaoudi, Zahraa Zghaib, Sonia Khier, Carine Deleuze-Masquefa, Florence Gattacceca
Displaying a strong antiproliferative activity on a wide variety of cancer cells, EAPB0203 and EAPB0503 belong to the imidazo[1,2-a]quinoxalines family of imiquimod structural analogues. EAPB0503 has been shown to inhibit tubulin polymerization. The aim of the present study is to characterize the interaction of EAPB0203 and EAPB0503 with tubulin. We combine experimental approaches at the cellular and the molecular level both in vitro and in silico in order to evaluate the interaction of EAPB0203 and EAPB0503 with tubulin...
2017: PloS One
https://www.readbyqxmd.com/read/28796885/photodynamic-therapy-is-more-effective-than-imiquimod-for-actinic-keratosis-in-organ-transplant-recipients-a-randomized-intra-individual-controlled-trial
#3
K Togsverd-Bo, C Halldin, C Sandberg, H Gonzalez, A M Wennberg, S S Sørensen, H C O Wulf, M Haedersdal
BACKGROUND: Actinic keratoses (AKs) in solid organ transplant recipients (OTRs) are difficult-to-treat pre-malignancies and comparison of topical therapies is therefore warranted. OBJECTIVES: In an intra-individual study to compare efficacy and safety of field treatment with methyl aminolevulinate photodynamic therapy (MAL-PDT) and imiquimod (IMIQ) for AKs in OTRs. MATERIALS AND METHODS: OTRs (n=35) with 572 AKs (grade I-III) in two similar areas in the face, scalp, dorsal hands or forearms were included...
August 10, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28777892/therapeutical-modulation-of-plasmacytoid-dendritic-cells-in-experimental-arthritis
#4
Ramzi Nehmar, Ghada Alsaleh, Benjamin Voisin, Vincent Flacher, Alexandre Mariotte, Victoria Saferding, Antonia Puchner, Birgit Niederreiter, Thierry Vandamme, Gernot Schabbauer, Philippe Kastner, Susan Chan, Peggy Kirstetter, Martin Holcmann, Christopher Mueller, Jean Sibilia, Seiamak Bahram, Stephan Blüml, Philippe Georgel
OBJECTIVES: The role of plasmacytoid dendritic cells (pDCs) and type I Interferons in rheumatoid arthritis (RA) remains controversial. To explore their contribution to RA pathogenesis, we induced experimental arthritis in various animal models of pDC depletion. We also monitored the effect of localized pDC recruitment and activation on joint inflammation and bone damage. METHODS: Experimental arthritis in mice was obtained by K/BxN serum transfer, heterologous collagen immunization (CIA) or in hTNF-transgenics...
August 4, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28777803/gm-csf-in-murine-psoriasiform-dermatitis-redundant-and-pathogenic-roles-uncovered-by-antibody-induced-neutralization-and-genetic-deficiency
#5
Tatjana Scholz, Andreas Weigert, Bernhard Brüne, Christian D Sadik, Beate Böhm, Harald Burkhardt
Granulocyte-macrophage colony-stimulating factor (GM-CSF) is a pleiotropic, Th17-derived cytokine thought to critically contribute to the pathogenesis of diverse autoimmune diseases, including rheumatoid arthritis and psoriasis. Treatment with monoclonal antibodies that block GM-CSF activity is associated with favorable therapeutic effects in patients with rheumatoid arthritis. We evaluated the role of GM-CSF as a potential target for therapeutic interference in psoriasis using a combined pharmacologic and genetic approach and the mouse model of imiquimod-induced psoriasiform dermatitis (IMQPD)...
2017: PloS One
https://www.readbyqxmd.com/read/28769106/lipoxin-a4-and-its-analog-suppress-inflammation-by-modulating-hmgb1-translocation-and-expression-in-psoriasis
#6
Xinxin Liu, Xin Wang, Xiaoru Duan, Devesh Poorun, Juntao Xu, Song Zhang, Lu Gan, Mengwen He, Ke Zhu, Zhangyin Ming, Feng Hu, Hongxiang Chen
Psoriasis is a chronic inflammatory skin disease that affects 2-3% of the global population, and there is still no known possibility of a cure. Lipoxin A4 (LXA4), an endogenous lipoxygenase-derived eicosanoid mediator, has potent dual pro-resolving and anti-inflammatory properties. BML-111 (5(S)-6(R)-7-trihydroxyheptanoic acid methyl ester), a lipoxin receptor agonist, has been previously confirmed to be equivalent to LXA4 in the anti-inflammatory processes. High mobility group box 1 (HMGB1) serves as an inflammatory cytokine when secreted extracellularly in psoriatic lesions and is involved in the development of psoriasis...
August 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28768901/essential-role-for-ccr6-in-certain-inflammatory-diseases-demonstrated-using-specific-antagonist-and-knockin-mice
#7
Remy Robert, Caroline Ang, Guizhi Sun, Laurent Juglair, Ee X Lim, Linda J Mason, Natalie L Payne, Claude Ca Bernard, Charles R Mackay
The chemokine receptor CCR6 marks subsets of T cells and innate lymphoid cells that produce IL-17 and IL-22, and as such may play a role in the recruitment of these cells to certain inflammatory sites. However, the precise role of CCR6 has been controversial, in part because no effective monoclonal antibody (mAb) inhibitors against this receptor exist for use in mouse models of inflammation. We circumvented this problem using transgenic mice expressing human CCR6 (hCCR6) under control of its native promoter (hCCR6-Tg/mCCR6-/-)...
August 3, 2017: JCI Insight
https://www.readbyqxmd.com/read/28761880/therapeutic-effects-of-methanol-extract-from-euphorbia-kansui-radix-on-imiquimod-induced-psoriasis
#8
Soo Jeong Kim, Ye Won Jang, Kyung Eun Hyung, Da Kyoung Lee, Kee Hyeob Hyun, So-Young Park, Eon-Sub Park, Kwang Woo Hwang
The roots of Euphorbia kansui, which belong to the family Euphorbiaceae, have been used as a traditional medicine for the treatment of various diseases such as diabetes, ascites, and leukemia. Recently, it was reported that the methylene chloride fraction of E. kansui radix (EKC) regulated the differentiation of Th17 cells and alleviated the symptoms of Th17-related inflammatory bowel disease. Imiquimod (IMQ), a TLR7/8 agonist, has been used to induce psoriasis in a mouse model. In this study, we evaluated the effect of EKC in an IMQ-induced psoriasis model...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28752123/topical-imiquimod-for-the-palliative-treatment-of-recurrent-oral-squamous-cell-carcinoma
#9
Annie Wester, Jennifer T Eyler, James W Swan
No abstract text is available yet for this article.
July 2017: JAAD Case Reports
https://www.readbyqxmd.com/read/28737238/the-possible-role-of-human-papillomavirus-infection-in-the-development-of-lichen-sclerosus
#10
REVIEW
Anna K Hald, Jan Blaakaer
Lichen sclerosus (LS) is a chronic inflammatory skin disease of unknown origin predominantly affecting the anogenital area that causes pruritus and pain and is associated with an increased risk of malignancy. In some cases, LS vanishes after application of imiquimod, raising the question whether human papillomavirus (HPV) may have an etiopathogenic role in anogenital LS. The databases MEDLINE and Embase were systematically searched using the PRISMA guidelines. Twenty-seven papers were included that reported the prevalence of HPV in LS and in LS associated with neoplasia...
July 24, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/28736282/imiquimod-induced-psoriasis-like-inflammation-in-differentiated-human-keratinocytes-its-evaluation-using-curcumin
#11
Sandeep R Varma, Thiyagarajan O Sivaprakasam, Abheepsa Mishra, Sunil Prabhu, Rafiq M, Rangesh P
Psoriasis is considered to be a systemic disease of immune dysfunction. It is still unclear what triggers the inflammatory cascade associated with psoriasis but recent evidences suggest the vital role of IL-23/IL-17A cytokine axis in etiology of psoriasis. Several studies have been conducted in psoriatic-like animal models but ethical issues and complexity surrounding it halts the screening of new anti-psoriatic drug candidates. Hence, in this study, we developed a new in-vitro model for psoriasis using imiquimod (IMQ) induced differentiated HaCaT cells which could be used for screening of new anti-psoriatic drug candidates...
July 21, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28726542/generation-and-functional-characterization-of-anti-human-and-anti-mouse-il-36r-antagonist-monoclonal-antibodies
#12
Rajkumar Ganesan, Ernest L Raymond, Detlev Mennerich, Joseph R Woska, Gary Caviness, Christine Grimaldi, Jennifer Ahlberg, Rocio Perez, Simon Roberts, Danlin Yang, Kavita Jerath, Kristopher Truncali, Lee Frego, Eliud Sepulveda, Priyanka Gupta, Su-Ellen Brown, Michael D Howell, Keith A Canada, Rachel Kroe-Barrett, Jay S Fine, Sanjaya Singh, M Lamine Mbow
Deficiency of interleukin (IL)-36 receptor antagonist (DITRA) syndrome is a rare autosomal recessive disease caused by mutations in IL36RN. IL-36R is a cell surface receptor and a member of the IL1R family that is involved in inflammatory responses triggered in skin and other epithelial tissues. Accumulating evidence suggests that IL-36R signaling may play a role in the pathogenesis of psoriasis. Therapeutic intervention of IL-36R signaling offers an innovative treatment paradigm for targeting epithelial cell-mediated inflammatory diseases such as the life-threatening psoriasis variant called generalized pustular psoriasis (GPP)...
July 20, 2017: MAbs
https://www.readbyqxmd.com/read/28708859/interleukin-17a-induced-production-of-acute-serum-amyloid-a-by-keratinocytes-contributes-to-psoriasis-pathogenesis
#13
Elodie Couderc, Franck Morel, Pierre Levillain, Amandine Buffière-Morgado, Magalie Camus, Camille Paquier, Charles Bodet, Jean-François Jégou, Mathilde Pohin, Laure Favot, Martine Garcia, Vincent Huguier, Jiad Mcheik, Corinne Lacombe, Hans Yssel, Gérard Guillet, François-Xavier Bernard, Jean-Claude Lecron
BACKGROUND: Acute-serum Amyloid A (A-SAA), one of the major acute-phase proteins, is mainly produced in the liver but extra-hepatic synthesis involving the skin has been reported. Its expression is regulated by the transcription factors NF-κB, C/EBPβ, STAT3 activated by proinflammatory cytokines. OBJECTIVES: We investigated A-SAA synthesis by resting and cytokine-activated Normal Human Epidermal Keratinocytes (NHEK), and their inflammatory response to A-SAA stimulation...
2017: PloS One
https://www.readbyqxmd.com/read/28702024/full-length-interleukin-33-aggravates-radiation-induced-skin-reaction
#14
Olga Kurow, Benjamin Frey, Louis Schuster, Verena Schmitt, Susanne Adam, Madelaine Hahn, Derek Gilchrist, Iain B McInnes, Stefan Wirtz, Udo S Gaipl, Gerhard Krönke, Georg Schett, Silke Frey, Axel J Hueber
The interleukin (IL)-1 family member IL-33 has been described as intracellular alarmin with broad roles in wound healing, skin inflammation but also autoimmunity. Its dichotomy between full length (fl) IL-33 and the mature (m) form of IL-33 and its release by necrosis is still not fully understood. Here, we compare functional consequences of both forms in the skin in vivo, and therefore generated two lines of transgenic mice which selectively overexpress mmIL-33 and flmIL-33 in basal keratinocytes. Transgene mRNA was expressed at high level in skin of both lines but not in organs due to the specific K14 promoter...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28693290/therapy-with-transcutaneous-administration-of-imiquimod-combined-with-oral-administration-of-sorafenib-suppresses-renal-cell-carcinoma-growing-in-an-orthotopic-mouse-model
#15
Takashi Karashima, Keiko Udaka, Mayumi Niimura, Katsuhide Suzuki, Hiroto Osakabe, Tsutomu Shimamoto, Satoshi Fukata, Keiji Inoue, Naoto Kuroda, Motoharu Seiki, Taro Shuin
Imiquimod is an imidazoquinoline immune response modifier that is used in antiviral and antiallergic creams. Combination therapy using transcutaneous imiquimod and oral sorafenib was previously demonstrated to reduce the tumor burden of renal cell carcinoma growing cutaneously in a mouse model. In the present study, an orthotopic mouse model was used to investigate whether combined treatment with oral sorafenib and transcutaneous imiquimod inhibited renal cell carcinoma growing in the kidney. Kidneys of female BALB/c mice were orthotopically implanted with RENCA mouse kidney cancer cells, and the mice were transcutaneously treated with cream containing imiquimod and/or with orally administered sorafenib 5 days following cell implantation...
July 2017: Oncology Letters
https://www.readbyqxmd.com/read/28689773/the-toll-like-receptor-ligands-hiltonol-%C3%A2-polyiclc-and-imiquimod-effectively-activate-antigen-specific-immune-responses-in-tasmanian-devils-sarcophilus-harrisii
#16
Amanda L Patchett, Cesar Tovar, Lynn M Corcoran, A Bruce Lyons, Gregory M Woods
Devil facial tumour disease (DFTD) describes two genetically distinct transmissible tumours that pose a significant threat to the survival of the Tasmanian devil. A prophylactic vaccine could protect devils from DFTD transmission. For this vaccine to be effective, potent immune adjuvants will be required. Toll-like receptors (TLRs) promote robust immune responses in human cancer studies and are highly conserved across mammalian species. In this study, we investigated the proficiency of TLR ligands for immune activation in the Tasmanian devil using in vitro mononuclear cell stimulations and in vivo immunisation trials with a model antigen...
July 6, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28677206/imiquimod-applied-interleukin-10-deficient-mice-better-reflects-severe-and-persistent-psoriasis-with-systemic-inflammatory-state
#17
Seon-Pil Jin, Seong-Joon Koh, Da-Ae Yu, Min-Woo Kim, Hee Tae Yun, Dong Hun Lee, Hyun-Sun Yoon, Soyun Cho, Hyun-Sun Park
Previous studies have shown that imiquimod-induced psoriasis-like skin inflammation in mice resembles phenotypic changes and cytokine profiles of human psoriasis. However, a psoriasis animal model reflecting the chronic inflammatory course and comorbidities has not yet been established. We aimed to evaluate the imiquimod-applied interleukin (IL)-10 deficient mouse model in comparison to previous models. IL-10 deficient and wild type (WT) mice received either imiquimod or vehicle cream for 12 days and were sacrificed on day 15...
July 4, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28672903/efficacy-of-fulguration-combined-with-imiquimod-cream-on-condyloma-acuminatum-and-the-effect-on-immune-functions-and-serums-levels-of-il-2-and-il-10
#18
Quan Chen, Ridong Yang, Aili Gao, Daoqing Zhong, Huilan Zhu
The objective of the present study was to investigate the clinical efficacy of high-frequency fulguration combined with 5% imiquimod cream for condyloma acuminatum (CA), and the effect on T cell immune function and serum levels of interleukin (IL)-2 and IL-10. We enrolled 112 patients with CA between January 2014 and January 2016. Patients were randomly divided into the control group (n=56) and observation group (n=56). The control group received high-frequency fulguration combined with intramuscular injection of Bacillus Calmette-Guérin polysaccharide nucleic acid, and the observation group received high-frequency fulguration combined with external application of 5% imiquimod cream...
July 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28670076/acute-exacerbation-of-myasthenia-gravis-with-topical-imiquimod-use
#19
Saadeddine Saad, Bobbak Mansouri, Chad Housewright
Imiquimod activates the immune system when applied to a local area. We report a patient with a history of well-controlled myasthenia gravis who was prescribed imiquimod for lentigo maligna. Treatment was halted after 2 weeks when the patient reported itching and irritating sensations in his throat, consistent with previous myasthenia exacerbations. The symptoms improved once imiquimod use was discontinued. We advise clinicians to be cautious when prescribing imiquimod to a patient with a history of myasthenia gravis...
July 2017: Proceedings of the Baylor University Medical Center
https://www.readbyqxmd.com/read/28668835/immunomodulatory-effect-of-imiquimod-through-ccl22-produced-by-tumor-associated-macrophages-in-b16f10-melanomas
#20
Sadanori Furudate, Taku Fujimura, Yumi Kambayashi, Aya Kakizaki, Takanori Hidaka, Setsuya Aiba
BACKGROUND/AIM: Tumor-associated macrophages (TAMs), together with splenic CD11b(+) cells, help maintain the tumor microenvironment. The immunomodulatory compound imiquimod (IQM) stimulates innate immune cells, including macrophages, to induce antitumor effects. In order to elucidate the effects of IQM on the tumor microenvironment, we investigated the immunomodulatory effect of IQM during melanoma growth by using the B16F10 melanoma model. MATERIALS AND METHODS: To elucidate the immunomodulatory effects of IQM on the tumor microenvironment, we isolated CD11b(+) TAMs and splenic CD11b(+) cells and evaluated the immunomodulatory effects of IQM, using the B16F10 melanoma model...
July 2017: Anticancer Research
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