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Itch protein

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https://www.readbyqxmd.com/read/28542131/aroclor1254-disrupts-the-blood-testis-barrier-by-promoting-endocytosis-and-degradation-of-junction-proteins-via-p38-mapk-pathway
#1
Xiaoyu Jia, Ying Xu, Weixing Wu, Yunxia Fan, Guoli Wang, Tianbiao Zhang, Wenhui Su
The blood-testis barrier (BTB) constituted by coexisting junction apparatus between Sertoli cells (SCs) plays an important role in spermatogenesis, which is a known target of various environmental toxicants. The commercial polychlorinated biphenyls mixture, Aroclor1254, has been shown to impair male reproduction by decreasing sperm count and affecting SC metabolism. This study was designed to investigate the effects of Aroclor1254 on the BTB integrity and elucidate the underlying mechanisms. We found that Aroclor1254 treatment in rats (1 or 3 mg/kg per day for 21 consecutive days) and in primary cultured SCs (5 or 10 μg/ml for 48 h) could induce BTB disruption via p38 MAPK pathway, concurrently with increments in junction proteins (JAM-A, N-cadherin, and β-catenin) endocytosis, and occludin ubiquitination...
May 25, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28512665/involvement-of-%C3%A2%C2%B5-opioid-receptors-and-%C3%AE%C2%BA-opioid-receptors-in-itch-related-scratching-behaviour-of-imiquimod-induced-psoriasis-like-dermatitis-in-mice
#2
Nobuaki Takahashi, Mitsutoshi Tominaga, Ryohei Kosaka, Yayoi Kamata, Yoshie Umehara, Hironori Matsuda, Azumi Sakaguchi, Hideoki Ogawa, Kenji Takamori
The pathogenesis of psoriatic itch is poorly understood. The aim of this study was to investigate the involvement of opioid receptors in scratching behaviour of imiquimod-induced psoriasis-like dermatitis model mice. Topical application of 5% imiquimod cream to the rostral back skin of mice induced antihistamine-resistant scratching behaviour. The expression of µ-opioid receptor (MOR) protein increased in the epidermis, dorsal root ganglia (DRG) and spinal cord of imiquimod-treated mice. In contrast, the expression of κ-opioid receptor (KOR) protein decreased in the DRG and spinal cord of imiquimod-treated mice, and was undetectable in the epidermis of both groups...
May 17, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/28465707/extract-from-periostracum-cicadae-inhibits-oxidative-stress-and-inflammation-induced-by-ultraviolet-b-irradiation-on-hacat-keratinocytes
#3
Tsong-Min Chang, Jen-Horng Tsen, Hsuan Yen, Ting-Ya Yang, Huey-Chun Huang
Periostracum cicadae is widely used for the treatment of skin diseases such as eczema, pruritus, and itching. The current study sought to evaluate the effect of P. cicadae extract on ultraviolet B (UVB) irradiation and identify the mechanisms involved. Photodamage-protective activity of P. cicadae extracts against oxidative challenge was screened using HaCaT keratinocytes. P. cicadae extracts did not affect cell viability but decreased reactive oxygen species (ROS) production. The extract attenuates the expression of interleukin-6 (IL-6), matrix metalloproteinase-2 (MMP-2), and MMP-9 in UVB-treated HaCaT cells...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28455968/dishevelled-3-phosphorylation-is-governed-by-hipk2-pp1c%C3%AE-itch-axis-and-the-non-phosphorylated-form-promotes-cancer-stemness-via-lgr5-in-hepatocellular-carcinoma
#4
Yu-Man Tsui, Karen Man-Fong Sze, Edmund Kwok-Kwan Tung, Daniel Wai-Hung Ho, Terence Kin-Wah Lee, Irene Oi-Lin Ng
Dishevelled-3 (Dvl3) is regarded as a binding hub with many different interacting partners. However, its regulation and mechanism on cancer stemness remain to be explored. In this study, we showed that Dvl3 was significantly overexpressed in human hepatocellular carcinomas (HCCs) and promoted cancer stemness both in vitro and in vivo. We found that the non-phosphorylated (NP)-Dvl3 was more stable than the phosphorylated form, more active in activating β-catenin transcriptional activity, and more potent in enhancing self-renewal ability in HCC cells...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28445195/protective-effect-of-botulinum-toxin-type-a-against-atopic-dermatitis-like-skin-lesions-in-nc-nga-mice
#5
Sang Bum Han, Hyeree Kim, Sang Hyun Cho, Jin Ho Chung, Hei Sung Kim
BACKGROUND: Botulinum neurotoxin (BTX) A possesses various biological activities, including anti-inflammatory and antipruritic actions. Human and animal studies have shown that BTX is effective in treating histamine-induced itch, lichen simplex chronicus, psoriasis, rosacea, allergic rhinitis, and scar prevention. However, its effect on atopic dermatitis (AD) has not been studied yet. OBJECTIVE: To examine the effect of BTX on AD using a mouse model. The primary outcome was skin thickness and transepidermal water loss (TEWL), and the secondary outcome was the alteration in skin severity scores, histological, and laboratory test results...
April 24, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28439030/epithelial-ezh2-serves-as-an-epigenetic-determinant-in-experimental-colitis-by-inhibiting-tnf%C3%AE-mediated-inflammation-and-apoptosis
#6
Yongfeng Liu, Junjie Peng, Tongyu Sun, Ni Li, Le Zhang, Jiale Ren, Huairui Yuan, Shan Kan, Qiang Pan, Xiang Li, Yufeng Ding, Min Jiang, Xiaoji Cong, Minjia Tan, Yushui Ma, Da Fu, Sanjun Cai, Yichuan Xiao, Xiaoming Wang, Jun Qin
Epithelial barrier disruption is a major cause of inflammatory bowel disease (IBD); however, the mechanism through which epigenetic regulation modulates intestinal epithelial integrity remains largely undefined. Here we show that EZH2, the catalytic subunit of polycomb repressive complex (PRC2), is indispensable for maintaining epithelial cell barrier integrity and homeostasis under inflammatory conditions. In accordance with reduced EZH2 expression in patients, the inactivation of EZH2 in IECs sensitizes mice to DSS- and TNBS-induced experimental colitis...
May 9, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28436082/tricellulin-is-a-target-of-the-ubiquitin-ligase-itch
#7
Susanne Jennek, Sonnhild Mittag, Juliane Reiche, Julie K Westphal, Stefanie Seelk, Max J Dörfel, Thorsten Pfirrmann, Karlheinz Friedrich, Anja Schütz, Udo Heinemann, Otmar Huber
Tricellulin, a member of the tight junction-associated MAGUK protein family, preferentially localizes to tricellular junctions in confluent polarized epithelial cell layers and is downregulated during the epithelial-mesenchymal transition. Posttranslational modifications are assumed to play critical roles in the process of downregulation of tricellulin at the protein level. Here, we report that the E3 ubiquitin ligase Itch forms a complex with tricellulin and thereby enhances its ubiquitination. Pull-down assays confirmed a direct interaction between tricellulin and Itch, which is mediated by the Itch WW domain and the N-terminus of tricellulin...
April 24, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28406540/salivary-chromogranin-a-levels-correlate-with-disease-severity-but-do-not-reflect-anxiety-or-personality-of-adult-patients-with-atopic-dermatitis
#8
Sakae Kaneko, Lijuan Liu, Takeyasu Kakamu, Masako Minami-Hori, Eishin Morita
Stress-induced scratching is an issue in patients with adult atopic dermatitis (AD). Although itching and stress are believed to be intimately related, no objective index is available; therefore, most evaluations are subjective. Using saliva, which is easily collected, we investigated the degree to which AD severity and patient stress levels are reflected in stress proteins in the saliva. Here, we evaluated the severity (Scoring Atopic Dermatitis [SCORAD] score), stress (State-Trait Anxiety Index [STAI] score), personality (Tokyo University Egogram [TEG] II score) and quality of life (Dermatology Life Quality Index [DLQI] score) of 51 patients with AD who were examined in the Department of Dermatology of Shimane University between April and December 2015...
April 13, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28396809/beer-cider-and-wine-allergy
#9
Rhea A Bansal, Susan Tadros, Amolak S Bansal
Background. Allergy to beer is often due to specific proteins in barley and sometimes to lipid transfer protein. Allergy to wine is frequently due to a sensitivity to grape proteins. We present a rare case of allergy to beer, wine, and cider resulting from IgE reactivity to yeasts and moulds which also explained the patient's additional sensitivity to yeast extracts and blue cheese. Case Presentation. The patient's symptoms included throat and facial itching accompanied by mild wheeze and severe urticaria. Diagnosis of allergy to yeast was confirmed by specific IgE testing as well as that to relevant foods and beverages...
2017: Case Reports in Immunology
https://www.readbyqxmd.com/read/28355943/atopic-eczema
#10
Stephen M Bauer
Atopic eczema (AE), or atopic dermatitis (AD), is a common inflammatory skin disease with a disrupted epidermal barrier and an allergic immune response. AD/AE is prominently characterized by a symptomatic itch and transient skin lesions. Infants compose a significant percentage affected. Two models have been proposed to explain AD/AE skin pathology: the gut microbiome-focused inside-outside model and the outside-inside model concentrating on the disrupted skin barrier/skin microbiome. Gene disruptions contributing to epidermal structure, as well as those in immune system genes, are implicated...
January 1, 2017: International Journal of Toxicology
https://www.readbyqxmd.com/read/28328802/curative-effect-of-neutral-macroporous-resin-hemoperfusion-on-treating-hemodialysis-patients-with-refractory-uremic-pruritus
#11
RANDOMIZED CONTROLLED TRIAL
Wen-Hong Li, Yu-Min Yin, Hao Chen, Xiao-Dan Wang, He Yun, Hui Li, Jie Luo, Jin-Wen Wang
This study aims to investigate the efficacy and safety of neutral macroporous resin hemoperfusion in treating maintenance hemodialysis (MHD) patients with refractory uremic pruritus (RUP).Ninety patients were enrolled and were randomly divided into 3 groups: control group, experiment 1 group, and experiment 2 group. Clinical symptom scores of skin itching were recorded before and at 4 and 8 weeks after the treatment. In addition, serum parathyroid hormone (PTH), calcium (Ca), phosphorus (P), and C-reactive protein (CRP) were detected; and the calcium-phosphorus product ([Ca] × [P]) was calculated to compare the curative effect...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28299654/roles-of-runx-genes-in-nervous-system-development
#12
Jae Woong Wang, Stefano Stifani
Runt-related (Runx) transcription factors play essential roles during development and adult tissue homeostasis and are responsible for several human diseases. They regulate a variety of biological mechanisms in numerous cell lineages. Recent years have seen significant progress in our understanding of the functions performed by Runx proteins in the developing and postnatal mammalian nervous system. In both central and peripheral nervous systems, Runx1 and Runx3 display remarkably specific expression in mostly non-overlapping groups of postmitotic neurons...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28298321/ubiquitin-e3-ligase-itch-negatively-regulates-osteoblast-function-by-promoting-proteasome-degradation-of-osteogenic-proteins
#13
J Liu, X Li, H Zhang, R Gu, Z Wang, Z Gao, L Xing
OBJECTIVES: Ubiquitin E3 ligase-mediated protein degradation regulates osteoblast function. Itch, an E3 ligase, affects numerous cell functions by regulating ubiquitination and proteasomal degradation of related proteins. However, the Itch-related cellular and molecular mechanisms by which osteoblast differentiation and function are elevated during bone fracture repair are as yet unknown. METHODS: We examined the expression levels of E3 ligases and NF-κB members in callus samples during bone fracture repair by quantitative polymerase chain reaction (qPCR) and the total amount of ubiquitinated proteins by Western blot analysis in wild-type (WT) mice...
March 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28288109/in-silico-design-of-novel-probes-for-the-atypical-opioid-receptor-mrgprx2
#14
Katherine Lansu, Joel Karpiak, Jing Liu, Xi-Ping Huang, John D McCorvy, Wesley K Kroeze, Tao Che, Hiroshi Nagase, Frank I Carroll, Jian Jin, Brian K Shoichet, Bryan L Roth
The primate-exclusive MRGPRX2 G protein-coupled receptor (GPCR) has been suggested to modulate pain and itch. Despite putative peptide and small-molecule MRGPRX2 agonists, selective nanomolar-potency probes have not yet been reported. To identify a MRGPRX2 probe, we first screened 5,695 small molecules and found that many opioid compounds activated MRGPRX2, including (-)- and (+)-morphine, hydrocodone, sinomenine, dextromethorphan, and the prodynorphin-derived peptides dynorphin A, dynorphin B, and α- and β-neoendorphin...
May 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28285986/calcium-dependent-regulation-of-protein-ubiquitination-interplay-between-e3-ligases-and-calcium-binding-proteins
#15
REVIEW
Rukmini Mukherjee, Aneesha Das, Saikat Chakrabarti, Oishee Chakrabarti
The ubiquitination status of proteins and intracellular calcium levels are two factors which keep changing inside any living cell. These two events appear to be independent of each other but recent experimental evidences show that ubiquitination of cellular proteins are influenced by calcium, Calmodulin, Calmodulin-dependent kinase II and other proteins of calcium dependent pathways. E3 ligases like Nedd4, SCF complex, APC, GP78 and ITCH are important regulators of calcium mediated processes. A bioinformatics analysis to inspect sequences and interacting partners of 242 candidate E3 ligases show the presence of calcium and/or Calmodulin binding motifs/domains within their sequences...
March 8, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28263039/sertraline-can-reduce-the-uremic-pruritus-in-hemodialysis-patient-a-double-blind-randomized-clinical-trial-from-southern-iran
#16
Maryam Pakfetrat, Leila Malekmakan, Noushin Hashemi, Taraneh Tadayon
INTRODUCTION: Uremic pruritus is an undesirable complication of end stage renal disease (ESRD). In spite of introduction of many treatments for this complication, it has no certain cure. The aim of this study was to assess sertraline effect on uremic pruritus. METHODS: In the present clinical trial study, we randomly divided our patients into two groups; trial group that received sertraline and control group that consumed placebo. We measured the severity of pruritus by two scoring systems (visual analogue scale and DUO) at the beginning and during the study with a-2-week interval...
March 6, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28235806/molecular-basis-of-interactions-between-sh3-domain-containing-proteins-and-the-proline-rich-region-of-the-ubiquitin-ligase-itch
#17
Guillaume Desrochers, Laurent Cappadocia, Mathieu Lussier-Price, Anh-Tien Ton, Riham Ayoubi, Adrian Serohijos, James G Omichinski, Annie Angers
The ligase Itch plays major roles in signaling pathways by inducing ubiquitylation-dependent degradation of several substrates. Substrate recognition and binding are critical for the regulation of this reaction. Like closely related ligases, Itch can interact with proteins containing a PPXY motif via its WW domains. In addition to these WW domains, Itch possesses a proline-rich region (PRR) that has been shown to interact with several Src homology 3 (SH3) domain-containing proteins. We have previously established that despite the apparent surface uniformity and conserved fold of SH3 domains, they display different binding mechanisms and affinities for their interaction with the PRR of Itch...
April 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28219706/substance-p-activates-mas-related-g-protein-coupled-receptors-to-induce-itch
#18
Ehsan Azimi, Vemuri B Reddy, Paula Juliana Seadi Pereira, Sebastien Talbot, Clifford J Woolf, Ethan A Lerner
BACKGROUND: Substance P (SP) is linked to itch and inflammation through activation of receptors on mast cells and sensory neurons. There is increasing evidence that SP functions through Mas-related G protein-coupled receptors (Mrgprs) in addition to its conventional receptor, neurokinin-1. OBJECTIVE: Because Mrgprs mediate some aspects of inflammation that had been considered mediated by neurokinin-1 receptor (NK-1R), we sought to determine whether itch induced by SP can also be mediated by Mrgprs...
February 20, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28134655/a-central-role-for-r7bp-in-the-regulation-of-itch-sensation
#19
Mritunjay Pandey, Jian-Hua Zhang, Santosh K Mishra, Poorni R Adikaram, Benjamin Harris, John F Kahler, Anna Loshakov, Roxanne Sholevar, Allison Genis, Claire Kittock, Juraj Kabat, Sundar Ganesan, Richard R Neubig, Mark A Hoon, William F Simonds
Itch is a protective sensation producing a desire to scratch. Pathologic itch can be a chronic symptom of illnesses such as uremia, cholestatic liver disease, neuropathies and dermatitis, however current therapeutic options are limited. Many types of cell surface receptors, including those present on cells in the skin, on sensory neurons and on neurons in the spinal cord, have been implicated in itch signaling. The role of G protein signaling in the regulation of pruriception is poorly understood. We identify here 2 G protein signaling components whose mutation impairs itch sensation...
May 2017: Pain
https://www.readbyqxmd.com/read/28130358/inhibition-mediated-by-glycinergic-and-gabaergic-receptors-on-excitatory-neurons-in-mouse-superficial-dorsal-horn-is-location-specific-but-modified-by-inflammation
#20
Tomonori Takazawa, Papiya Choudhury, Chi-Kun Tong, Charles M Conway, Grégory Scherrer, Pamela D Flood, Jun Mukai, Amy B MacDermott
The superficial dorsal horn is the synaptic termination site for many peripheral sensory fibers of the somatosensory system. A wide range of sensory modalities are represented by these fibers, including pain, itch, and temperature. Because the involvement of local inhibition in the dorsal horn, specifically that mediated by the inhibitory amino acids GABA and glycine, is so important in signal processing, we investigated regional inhibitory control of excitatory interneurons under control conditions and peripheral inflammation-induced mechanical allodynia...
March 1, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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