keyword
MENU ▼
Read by QxMD icon Read
search

HAMP

keyword
https://www.readbyqxmd.com/read/28410873/under-the-superficial-dichotomy-pathogen-and-allergen-are-two-manifestations-of-same-immune-activation-and-pathogenesis-mechanisms
#1
S Patel
Pathogens and allergens are deemed as two contrasting facets of host immune status, deficiency and exuberant. In silico domain analysis of a diverse panel of pathogen and allergen proteins has revealed the shortcoming of this notion. Both the pathogen and allergen proteins elicit immune activation, with the outcome of immune agitation depending on the pathogen strain, allergen exposure duration, and host factors. Pathogens can replicate within the host and constantly irritate the immune system, leading to blood coagulation, respiratory collapse and death...
April 11, 2017: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/28405918/hepcidin-suppression-in-%C3%AE-thalassemia-is-associated-with-the-down-regulation-of-atonal-homolog-8
#2
Supranee Upanan, Andrew T McKie, Gladys O Latunde-Dada, Sittiruk Roytrakul, Chairat Uthaipibull, Peraphan Pothacharoen, Prachya Kongtawelert, Suthat Fucharoen, Somdet Srichairatanakool
Atonal homolog 8 (ATOH8) is defined as a positive regulator of hepcidin transcription, which links erythropoietic activity with iron-sensing molecules. In the present study, we investigated the association between hepcidin and ATOH8 expression in β-thalassemia. We found that inhibition of hepcidin expression in β-thalassemia is correlated with reduced ATOH8 expression. Hepatic hepcidin 1 (Hamp1) and Atoh8 mRNA expression were down-regulated in β-thalassemic mice. Hepcidin (HAMP) and ATOH8 mRNA expression were consistently suppressed in Huh7 cells cultured in medium supplemented with β-thalassemia patient serum...
April 12, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/28402881/stability-and-conformation-of-a-chemoreceptor-hamp-domain-chimera-correlates-with-signaling-properties
#3
Nattakan Sukomon, Joanne Widom, Peter P Borbat, Jack H Freed, Brian R Crane
HAMP domains are dimeric, four-helix bundles that transduce conformational signals in bacterial receptors. Genetic studies of the Escherichia coli serine receptor (Tsr) provide an opportunity to understand HAMP conformational behavior in terms of functional output. To increase its stability, the Tsr HAMP domain was spliced into a poly-HAMP unit from the Pseudomonas aeruginosa Aer2 receptor. Within the chimera, the Tsr HAMP undergoes a thermal melting transition at a temperature much lower than that of the Aer2 HAMP domains...
April 11, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28386570/pathogenic-roles-of-glutamic-acid-decarboxylase-65-autoantibodies-in-cerebellar-ataxias
#4
REVIEW
Hiroshi Mitoma, Mario Manto, Christiane S Hampe
Reports suggesting a pathogenic role of autoantibodies directed against glutamic acid decarboxylase 65 (GAD65Abs) in cerebellar ataxias (CAs) are reviewed, and debatable issues such as internalization of antibodies by neurons and roles of epitopes are discussed. GAD65 is one of two enzymes that catalyze the conversion of glutamate to the inhibitory neurotransmitter gamma-aminobutyric acid (GABA). A pathogenic role of GAD65Ab in CAs is suggested by in vivo and in vitro studies. (1) Intracerebellar administration of cerebrospinal fluid (CSF) immunoglobulins (IgGs) obtained from GAD65Ab-positive CA patients impairs cerebellar modulation of motor control in rats...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28363629/juvenile-hemochromatosis-and-hepatocellular-carcinoma-in-a-patient-with-a-novel-mutation-in-the-hjv-gene
#5
Khushnooda Ramzan, Faiqa Imtiaz, Hamad I Al-Ashgar, Moeenaldeen AlSayed, Raashda A Sulaiman
Juvenile hemochromatosis is a rare but the most severe form of hereditary hemochromatosis which develops due to mutations in the HJV or HAMP genes. It presents in early adulthood mainly as cardiomyopathy, hypogonadism and liver fibrosis. Unlike hereditary hemochromatosis due to HFE mutation, hepatocellular carcinoma is not known to be associated with juvenile hemochromatosis. Here, we report a patient of Arab ancestry who presented with severe cardiomyopathy. Sequence analysis of the HJV gene followed by homozygosity mapping, identified a previously undescribed homozygous missense variation in exon 3 (c...
March 28, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28335084/identification-of-new-bmp6-pro-peptide-mutations-in-patients-with-iron-overload
#6
Chiara Piubelli, Annalisa Castagna, Giacomo Marchi, Monica Rizzi, Fabiana Busti, Sadaf Badar, Monia Marchetti, Marco De Gobbi, Antonella Roetto, Luciano Xumerle, Eda Suku, Alejandro Giorgetti, Massimo Delledonne, Oliviero Olivieri, Domenico Girelli
Hereditary Hemochromatosis (HH) is a genetically heterogeneous disorder caused by mutations in at least 5 different genes (HFE, HJV, TFR2, SLC40A1, HAMP) involved in the production or activity of the liver hormone hepcidin, a key regulator of systemic iron homeostasis. Nevertheless, patients with an HH-like phenotype that remains completely/partially unexplained despite extensive sequencing of known genes are not infrequently seen at referral centers, suggesting a role of still unknown genetic factors. A compelling candidate is Bone Morphogenetic Protein 6 (BMP6), which acts as a major activator of the BMP-SMAD signaling pathway, ultimately leading to the upregulation of hepcidin gene transcription...
March 23, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28321044/investigation-of-the-early-response-genes-in-chemical-induced-renal-carcinogenicity-for-the-prediction-of-chemical-carcinogenicity-in-rats
#7
Hiroshi Matsumoto, Fumiyo Saito, Masahiro Takeyoshi
This study was designed to identify early-response genes of chemical-induced renal carcinogenicity for the prediction of chemical carcinogenicity in rats. We conducted a 28-day repeated-dose test in male Crl:CD (SD) rats with 12 carcinogens and 10 non-carcinogens as the training dataset, and five carcinogens and five non-carcinogens as the validation dataset. Renal gene expression profiles were analyzed by using a microarray. Fifteen candidate genes were selected from the gene expression profiles of the training dataset as genes that showed specific expression in response to carcinogens...
2017: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/28282554/erythropoietin-administration-increases-splenic-erythroferrone-protein-content-and-liver-tmprss6-protein-content-in-rats
#8
Iuliia Gurieva, Jana Frýdlová, Zuzana Rychtarčíková, Martin Vokurka, Jaroslav Truksa, Jan Krijt
Erythroferrone (ERFE) and TMPRSS6 are important proteins in the regulation of iron metabolism. The objective of the study was to examine splenic ERFE and liver TMPRSS6 synthesis in rats treated with a combination of iron and erythropoietin (EPO). EPO was administered to female Wistar rats at 600U/day for four days, iron-pretreated rats received 150mg of iron before EPO treatment. Content of ERFE and TMPRSS6 proteins was determined by commercial antibodies. Iron pretreatment prevented the EPO-induced decrease in hepcidin expression...
February 28, 2017: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28274107/pathophysiology-and-management-of-alcoholic-liver-disease-update-2016
#9
REVIEW
Felix Stickel, Christian Datz, Jochen Hampe, Ramon Bataller
Alcoholic liver disease (ALD) is a leading cause of cirrhosis, liver cancer, and acute and chronic liver failure and as such causes significant morbidity and mortality. While alcohol consumption is slightly decreasing in several European countries, it is rising in others and remains high in many countries around the world. The pathophysiology of ALD is still incompletely understood but relates largely to the direct toxic effects of alcohol and its main intermediate, acetaldehyde. Recently, novel putative mechanisms have been identified in systematic scans covering the entire human genome and raise new hypotheses on previously unknown pathways...
March 15, 2017: Gut and Liver
https://www.readbyqxmd.com/read/28263819/cortisol-plays-a-role-in-the-high-environmental-ammonia-associated-suppression-of-the-immune-response-in-zebrafish
#10
A F Gonçalves, J V Neves, J Coimbra, P Rodrigues, M M Vijayan, J M Wilson
Exposure to high environmental ammonia (HEA) levels increases the vulnerability of fishes to parasitic, viral and bacterial diseases. We tested the hypothesis that elevated plasma cortisol levels play a role in the HEA-mediated immunosuppression in fishes. To this end, we tested the effect of exogenous cortisol treatment on the lipopolysaccharide (LPS)-induced immune response in zebrafish (Danio rerio). Also, to test whether glucocorticoid receptor (GR) signaling is involved in HEA-mediated immunosuppression, zebrafish were treated with mifepristone, a GR antagonist, and the LPS-induced immune response assessed after HEA exposure...
March 2, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28228829/hepatic-iron-storage-is-related-to-body-adiposity-and-hepatic-inflammation
#11
Chan Yoon Park, Jayong Chung, Kyung-Ok Koo, Min Soo Kim, Sung Nim Han
BACKGROUND: Obesity has been reported to be associated with iron deficiency. However, few studies have investigated iron status in low adiposity. To investigate whether body adiposity was associated with altered hepatic iron status, we compared liver iron levels and markers involved in inflammation and iron absorption in obese, control, and mildly calorie restricted mice. METHODS: Seven week old C57BL/6 mice were fed control (10% kcal fat, Control) or high fat (60% kcal fat, HFD) diets, or reduced amount of control diet to achieve 15% calorie restriction (CR) for 16 weeks...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28228505/postdiagnostic-mediterranean-and-healthy-nordic-dietary-patterns-are-inversely-associated-with-all-cause-mortality-in-long-term-colorectal-cancer-survivors
#12
Ilka Ratjen, Clemens Schafmayer, Romina di Giuseppe, Sabina Waniek, Sandra Plachta-Danielzik, Manja Koch, Ute Nöthlings, Jochen Hampe, Sabrina Schlesinger, Wolfgang Lieb
Background: Dietary factors are known to affect the risk of new-onset colorectal cancer (CRC), but information on the extent to which postdiagnostic diet affects mortality in long-term CRC survivors is scarce.Objective: We investigated the association of 2 a priori-defined postdiagnostic dietary patterns [Modified Mediterranean Diet Score (MMDS) and healthy Nordic Food Index (HNFI)] with all-cause mortality in long-term CRC survivors.Methods: Diet was assessed at a median time of 6 y after cancer diagnosis in 1404 CRC survivors (median age: 69 y; 56% men) in a prospective cohort study in Northern Germany by using a semiquantitative food-frequency questionnaire...
February 22, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28213091/convergence-of-hepcidin-deficiency-systemic-iron-overloading-heme-accumulation-and-rev-erb%C3%AE-%C3%AE-activation-in-aryl-hydrocarbon-receptor-elicited-hepatotoxicity
#13
Kelly A Fader, Rance Nault, Mathew P Kirby, Gena Markous, Jason Matthews, Timothy R Zacharewski
Persistent aryl hydrocarbon receptor (AhR) agonists elicit dose-dependent hepatic lipid accumulation, oxidative stress, inflammation, and fibrosis in mice. Iron (Fe) promotes AhR-mediated oxidative stress by catalyzing reactive oxygen species (ROS) production. To further characterize the role of Fe in AhR-mediated hepatotoxicity, male C57BL/6 mice were orally gavaged with sesame oil vehicle or 0.01-30μg/kg 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) every 4days for 28days. Duodenal epithelial and hepatic RNA-Seq data were integrated with hepatic AhR ChIP-Seq, capillary electrophoresis protein measurements, and clinical chemistry analyses...
February 16, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28210661/maraviroc-as-possible-treatment-for-pml-iris-in-natalizumab-treated-patients-with-ms
#14
Sibylle C Hodecker, Klarissa H Stürner, Veit Becker, Birte Elias-Hamp, Brigitte Holst, Manuel A Friese, Christoph Heesen
No abstract text is available yet for this article.
March 2017: Neurology® Neuroimmunology & Neuroinflammation
https://www.readbyqxmd.com/read/28204924/genome-wide-analysis-of-transposable-elements-in-the-coffee-berry-borer-hypothenemus-hampei-coleoptera-curculionidae-description-of-novel-families
#15
Eric M Hernandez-Hernandez, Rita Daniela Fernández-Medina, Lucio Navarro-Escalante, Jonathan Nuñez, Pablo Benavides-Machado, Claudia M A Carareto
The coffee berry borer (CBB) Hypothenemus hampei is the most limiting pest of coffee production worldwide. The CBB genome has been recently sequenced; however, information regarding the presence and characteristics of transposable elements (TEs) was not provided. Using systematic searching strategies based on both de novo and homology-based approaches, we present a library of TEs from the draft genome of CBB sequenced by the Colombian Coffee Growers Federation. The library consists of 880 sequences classified as 66% Class I (LTRs: 46%, non-LTRs: 20%) and 34% Class II (DNA transposons: 8%, Helitrons: 16% and MITEs: 10%) elements, including families of the three main LTR (Gypsy, Bel-Pao and Copia) and non-LTR (CR1, Daphne, I/Nimb, Jockey, Kiri, R1, R2 and R4) clades and DNA superfamilies (Tc1-mariner, hAT, Merlin, P, PIF-Harbinger, PiggyBac and Helitron)...
February 15, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28197547/neural-progenitor-cells-promote-axonal-growth-and-alter-axonal-mrna-localization-in-adult-neurons
#16
Tanuja T Merianda, Ying Jin, Ashley L Kalinski, Pabitra K Sahoo, Itzhak Fischer, Jeffery L Twiss
The inhibitory environment of the spinal cord and the intrinsic properties of neurons prevent regeneration of axons following CNS injury. However, both ascending and descending axons of the injured spinal cord have been shown to regenerate into grafts of embryonic neural progenitor cells (NPCs). Previous studies have shown that grafts composed of glial-restricted progenitors (GRPs) and neural-restricted progenitors (NRPs) can provide a permissive microenvironment for axon growth. We have used cocultures of adult rat dorsal root ganglion (DRG) neurons together with NPCs, which have shown significant enhancement of axon growth by embryonic rat GRP and GRPs/NRPs, both in coculture conditions and when DRGs are exposed to conditioned medium from the NPC cultures...
January 2017: ENeuro
https://www.readbyqxmd.com/read/28172755/p326-efficacy-of-vedolizumab-on-patient-reported-outcomes-in-ulcerative-colitis-patients-results-from-a-prospective-german-observational-study
#17
C Schmidt, C Langbein, R Atreya, T Bruns, A Dignass, K Ende, J Hampe, F Hartmann, M F Neurath, J Maul, J C Preiss, R Schmelz, B Siegmund, H Schulze, N Teich, U van Arnim, D Medicine Baumgart, A Stallmach
No abstract text is available yet for this article.
February 1, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28167524/gas-sensing-and-signaling-in-the-pas-heme-domain-of-the-pseudomonas-aeruginosa-aer2-receptor
#18
Darysbel Garcia, Emilie Orillard, Mark S Johnson, Kylie J Watts
The Aer2 chemoreceptor from Pseudomonas aeruginosa contains a PAS sensing domain that coordinates b-type heme and signals in response to the binding of O2, CO or NO. PAS-heme structures suggest that Aer2 uniquely coordinates heme via a His residue on a 310 helix (H234 on Eη), stabilizes O2 binding via a Trp residue (W283), and signals via both W283 and an adjacent Leu residue (L264). Ligand binding may displace L264 and reorient W283 for hydrogen-bonding to the ligand. Here we clarified the mechanisms by which Aer2-PAS binds heme, regulates ligand-binding, and initiates conformational signaling...
February 6, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28165484/new-insights-on-signal-propagation-by-sensory-rhodopsin-ii-transducer-complex
#19
A Ishchenko, E Round, V Borshchevskiy, S Grudinin, I Gushchin, J P Klare, A Remeeva, V Polovinkin, P Utrobin, T Balandin, M Engelhard, G Büldt, V Gordeliy
The complex of two membrane proteins, sensory rhodopsin II (NpSRII) with its cognate transducer (NpHtrII), mediates negative phototaxis in halobacteria N. pharaonis. Upon light activation NpSRII triggers a signal transduction chain homologous to the two-component system in eubacterial chemotaxis. Here we report on crystal structures of the ground and active M-state of the complex in the space group I212121. We demonstrate that the relative orientation of symmetrical parts of the dimer is parallel ("U"-shaped) contrary to the gusset-like ("V"-shaped) form of the previously reported structures of the NpSRII/NpHtrII complex in the space group P21212, although the structures of the monomers taken individually are nearly the same...
February 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28163301/homeostasis-altering-molecular-processes-as-mechanisms-of-inflammasome-activation
#20
REVIEW
Adrian Liston, Seth L Masters
The innate immune system uses a distinct set of germline-encoded pattern recognition receptors (PRRs) to initiate downstream inflammatory cascades. This recognition system is in stark contrast to the adaptive immune system, which relies on highly variable, randomly generated antigen receptors. A key limitation of the innate immune system's reliance on fixed PRRs is its inflexibility in responding to rapidly evolving pathogens. Recent advances in our understanding of inflammasome activation suggest that the innate immune system also has sophisticated mechanisms for responding to pathogens for which there is no fixed PRR...
March 2017: Nature Reviews. Immunology
keyword
keyword
68154
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"