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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Use of protein monocyte chemoattractant-1 as a biomarker early kidney injury in patients with sickle cell disease / Uso da proteÃna quimiotÃtica de monÃcitos-1 como biomarcador de lesÃo renal precoce em pacientes com anemia falciforme

Talyta Ellen de Jesus dos Santos 17 April 2014 (has links)
CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / Novos biomarcadores da funÃÃo renal estÃo sendo estudados com o propÃsito de detectar precocemente alteraÃÃes renais em portadores de AF, dentre eles encontra-se a proteÃna quimiotÃtica de monÃcitos 1 (MCP-1), uma quimiocina de monÃcitos e macrÃfagos, produzida por cÃlulas do sistema renal em resposta ao processo de isquemia-reperfusÃo. OBJETIVO: Avaliar o uso de MCP-1 como biomarcador de lesÃo renal precoce em pacientes adultos com anemia falciforme em uso ou nÃo de hidroxiureia (HU). METODOLOGIA: Participaram do estudo 50 pacientes: 30 em uso de (HU)-grupo SSHU e 20 sem HU-grupo SS. Um grupo controle foi composto por 20 indivÃduos com HbAA, sem complicaÃÃes renais. ProteinÃria, albuminÃria, creatinina e urÃia urinÃrias, marcadores do estresse oxidativo como MDA e NOx foram determinados por mÃtodos espectrofotomÃtricos. MCP-1 urinÃrio foi detectado por enzima imunoensaio (ELISA). Os dados clÃnicos e de hemograma, creatinina e ureia sÃricas foram retirados do prontuÃrio mÃdico. Foi coletada a primeira urina do dia. O programa Graph Pad Prism 5.0 foi utilizado para anÃlise estatÃstica. A comparaÃÃo das mÃdias entre os grupos foi realizada atravÃs do teste t de Student e anÃlise de variÃncia (ANOVA). RESULTADOS E DISCUSSÃO: Albumina urinÃria esteve maior nos pacientes em relaÃÃo ao grupo controle (Controle-3.12 Â 4.35; SSHU- 11.85 Â 9.16; SS- 14.13 Â 12.22; p <0.0001). A taxa de filtraÃÃo glomerular estimada apresentou-se significantemente menor no grupo controle (Controle- 95.9 Â 19.92; SSHU- 137.9 Â 40.7 e SS- 140.1 Â 53.9; p= 0.0024). Observaram-se nÃveis elevados de MCP-1 (Controle- 42.12 Â 27.6; grupo SSHU- 166.2 Â 88.37 e grupo SS- 219.7 Â 115.0; p<0.001; p=0.039); MDA (Controle- 2.29 Â 1.13; grupo SSHU-5.25 Â 2.33 e grupo SS- 6.93 Â 2.12; p<0.0001;p=0.006) e NOx (Controle-2.25Â1.9; grupo SSHU-56.54 Â 9.15 e grupo SS 39.12 Â9.02; p<0.0001; p=0.001) nos pacientes em comparaÃÃo aos controles saudÃveis, e mais elevados no grupo SS em relaÃÃo ao grupo SSHU. Os pacientes com haplÃtipo Bantu/Bantu apresentaram maior concentraÃÃo de MCP-1, independente do uso de HU, seguido de Bantu/ Benin e Benin/Benin (p=0.01). Observou-se correlaÃÃo positiva entre os uma correlaÃÃo entre os nÃveis de MCP-1 e contagem de monÃcitos (p=0.004; r= 0.42); proteinÃria (p=0.002; r=0.43); albuminÃria (p=0.0004; r=0.47); TFG (p=0.02; r=0.32); MDA (p=0.02; r=0.32) e NOx (p=0.007; r= 0.38). CONCLUSÃO: Os resultados indicam que MCP-1 foi preditivo na detecÃÃo de alteraÃÃo renal, e que pode estar correlacionado ao dano causado pelo estresso oxidativo nos rins, evidenciado pelos altos nÃveis de MDA. Ainda, a HU parece ter reduzido o dano renal, visto que os pacientes em uso do fÃrmaco apresentaram nÃveis reduzidos desses parÃmetros.
12

Einfluss eines Inhibitors der Glutaminylzyklase auf die in-Stent Restenose im atherosklerotischen Kaninchenmodell

Nykiel, Vera 14 June 2017 (has links)
Die Hauptursache für menschliche Erkrankungen des Herz Kreislaufsystems in den westlichen Industrienationen ist die Atherosklerose. Die konventionelle minimalinvasive Therapie in der Humanmedizin ist die perkutane transluminale Angioplastie (PTA), bei der durch einen arteriellen Gefäßzugang die Stenose mittels Ballonkatheter aufgedehnt und optional eine Gefäßstütze (Stent) implantiert werden kann, um das atherosklerotische Gefäß offen zu halten. In 20 % der Fälle kommt es jedoch ein Jahr nach der Behandlung zum Gefäßwiederverschluss, der in-Stent Restenose (ISR). Einer der postulierten verantwortlichen molekularen Mechanismen ist die überschießende Monozyteninvasion, die durch die Freisetzung spezifischer Signalmoleküle, vor allem dem Monozyten-anlockenden Chemokin CCL2, ausgelöst wird. Die metabolische Stabilität von CCL2 wird durch das Enzym isoGlutaminylzyklase (isoQC) vermittelt. Diese enzymatische Modifikation ist relevant für die chemotaktische Potenz und schützt CCL2 vor einem N-terminalen Abbau durch Aminopeptidasen und der somit verbundenen Inaktivierung. Ziel dieser Arbeit war es, in einem geeigneten Tiermodell das Enzym isoQC nach Stentimplantation zu hemmen, dadurch die Konzentration von zyklisiertem CCL2 zu reduzieren und somit den potentiellen für die ISR mitverantwortlichen Wirkmechanismus der Monozyteninvasion in vivo zu darzustellen.
13

CCL2 as a potential therapeutic target for clear cell renal cell carcinoma / CCL2は淡明型腎細胞癌に対する治療ターゲットとなりうる

Arakaki, Ryuichiro 23 March 2017 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(医学) / 甲第20265号 / 医博第4224号 / 新制||医||1021(附属図書館) / 京都大学大学院医学研究科医学専攻 / (主査)教授 柳田 素子, 教授 武田 俊一, 教授 野田 亮 / 学位規則第4条第1項該当 / Doctor of Medical Science / Kyoto University / DFAM
14

The Presence of Pain Related Cytokines and Chemokines in Schwannomas and Their Potential Association with Chronic Pain in Schwannomatosis

Nagamoto, Jackson D 01 January 2019 (has links)
Schwannomatosis (SWN) is a genetic disorder that predisposes affected individuals to develop multiple Schwannomas anywhere in the peripheral nervous system. This can be due to a mutation in the LZTR1 or SMARCB1 genes on chromosome 22. SWN has the defining clinical symptom of chronic pain and a lack of vestibular schwannomas, which sets it apart from other, related disorders such as Neurofibromatosis Type II (NF2). Currently, it is unknown what causes the chronic pain of SWN patients but it is hypothesized that cytokines may have promote the neuropathic pain experienced by patients. This study investigates the presence of the chemokine CCL2 and the cytokine IL6 in human SWN schwannomas and non-SWN schwannomas to determine if there is a difference in the presence of these cytokines between the two tumor types. It was demonstrated that all of the SWN schwannomas expressed both CCL2 and IL6 whereas the non-SWN schwannomas expressed only one or the other protein if either. These results indicate that the presence of these cytokines within the SWN schwannomas is different from non-SWN schwannomas and could be a potential contributing factor in the occurrence of neuropathic pain experienced by SWN which is part of the differential diagnosis for NF2 and SWN.
15

Mise en évidence du rôle physiologique de la chimiokine CCL2 dans la neurotransmission nociceptive au niveau spinal / Demonstration of the physiological function of the CCL2 chemokine in spinal nociceptive neurotransmission

Dansereau, Marc-André January 2015 (has links)
Résumé : Contrairement à ce que l'on pourrait croire, les douleurs chroniques ne constituent pas uniquement des symptômes, mais bien une pathologie à part entière. La pharmacopée actuelle ne permettant pas de les soulager efficacement, il y a maintenant un besoin de les considérer dans leur spécificité lors de la recherche de nouvelles thérapies. Dans cette optique, nous avons étudié le rôle des chimiokines et de leurs récepteurs dans le contrôle de la douleur. Connu pour leur rôle dans la réponse immunitaire, nous avons en particulier investigué le rôle du couple ligand-récepteur CCL2-CCR2 dans la régulation des douleurs d’origine arthritique. Nous avons d'abord évalué l'effet analgésique de notre molécule antagoniste du récepteur CCR2, l'INCB3344, dans un modèle de douleur inflammatoire où elle renverse d'environ 50% les douleurs provoquées et les douleurs spontanées lorsqu'administrée par voie spinale. Nous avons également pu observer que bloquer l'activation de CCR2 au niveau de la moelle épinière limite non seulement la neuroinflammation spinale, mais permet également de réduire la sévérité de l'atteinte inflammatoire périphérique en limitant le transport rétrograde de la substance P. Nous avons ensuite appliqué nos observations sur un modèle de douleur arthritique plus près de la réalité clinique des patients souffrant d'arthrite rhumatoïde. Nous y avons reproduit la majorité de nos effets analgésiques suite à une administration spinale. Le traitement est cependant demeuré sans effet sur l'œdème périphérique. Parallèlement à cela, l'administration périphérique du composé, sur une base de deux bolus par jour ou en libération continue par des mini-pompes osmotiques, n'a eu que de très faibles effets analgésiques, mais s'est révélé avoir un impact marquant sur l'œdème périphérique et le gain de poids des animaux. Finalement, c'est en combinant l'INCB3344 avec de l'ibuprofène qu'il a été possible d'avoir un impact positif sur le plus grand nombre de paramètres associés à la douleur chronique. Ces résultats suggèrent donc qu'un antagoniste du récepteur CCR2 possède un potentiel analgésique intéressant, d'autant plus lorsqu'il s'agit de douleur d'origine inflammatoire puisqu'il permet d'agir à la fois sur l'hypersensibilité nociceptive et sur la source même de la douleur inflammatoire. Ce potentiel devient d'autant plus intéressant que de le combiner à un anti-inflammatoire non-stéroïdien (l'ibuprofène) améliore l'efficacité des deux composés. // Abstract : Contrary to popular beliefs, chronic pain is not only a set of symptoms, but a bona fide pathology that the drugs currently available are not sufficient to efficiently relieve. There is thus a need to modify our approach to discover new analgesic agents, taking into consideration the specific physiopathology of chronic pain. With this in mind, we investigated the role of chemokines and their receptors in the modulation of pain. Also known for their participation in the immune response, we focused on the CCL2-CCR2 ability to regulate arthritic pain. We first evaluated the analgesic properties of INCB3344, a specific antagonist of the CCR2 receptor, in a model of inflammatory pain. It reverses both provoked and spontaneous pain by 50% when administered i.t. We also observed that spinally blocking CCR2 limited the expression of proinflammatory mediators. It also reduced peripheral inflammation by preventing peripheral transport of SP. We then translated our findings in a model of arthritic pain, closer to the clinical reality of patients with rheumatoid arthritis. Spinal administration of INCB3344 had similar analgesic actions, but did not altered peripheral inflammation. On the other hand, peripheral administration of INCB3344, either by subcutaneous injection or by continuous release assured by an osmotic pump, had almost no analgesic effects, but significantly reduced peripheral inflammation and reduced the weight loss. By combining INCB3344 with a daily administration of ibuprofen, we were however able to reduce both pain hypersensitivity and the severity of the peripheral inflammation. Taken together, these results suggest that CCR2 antagonism has promising analgesic properties; especially for inflammatory or arthritic pain as it can acts both on the sensibilized nociceptive network and on the peripheral source of the inflammatory pain. This become even more interesting as its mechanism is at least not completely redundant with those of classic non-steroidal anti-inflammatory drugs, which allow the combination of both class of molecule to yield even larger effect.
16

Úloha míšních TRPV1 receptorů v nociceptivním přenosu a modulační účinky chemokinu CCL2 a agonistů µ-opioidního receptoru / The role of spinal TRPV1 receptors in nociceptive signalling and the modulatory effect of chemokine CCL2 and µ-opioid receptor agonists

Šulcová, Dominika January 2017 (has links)
The first nociceptive synapse in the spinal cord dorsal horn represents an important site, where nociceptive synaptic transmission can be modulated under pathological conditions. One of the modulatory mechanism involves activation of the transient receptor potential vanilloid 1 (TRPV1) that is expressed on central terminals of primary nociceptive neurons, where it regulates release of neurotransmitters and neuromodulators. Previous studies suggested that changes in TRPV1 activity may be related to effects of chemokine CCL2 (C-C motif ligand 2) and may be also involved in synaptic transmission modulation after µ-opioid receptors (MOP-R) activation. Because CCL2 receptors CCR2 often co-localize with TRPV1 and MOP-R, the goal of this work was to studypossible interactions of these receptors on the pre-synaptic endings of primaryafferents in the spinal cord dorsal horn and their role in nociceptive signalling under pathological conditions. The presented thesis focused on the effect of CCL2 during peripheral neuropathy and its interference with µ-opioid receptor activation. To studysynaptic transmission at the spinal cord level, patch-clamp recordings of excitatory post-synaptic currents (EPSC) in superficial spinal cord dorsal horn neurons in acute lumbar spinal cord slices from rats was used....
17

Identifying a Biomarker for Systemic Sclerosis Using Existing Genomic Data

Dutta, Joyeeta January 2021 (has links)
No description available.
18

Exploring the roles of atypical MAP kinases ERK3 and ERK4 during inflammation

Barbagallo, Michelle 08 1900 (has links)
No description available.
19

Dissecting the Roles of Macrophage Subpopulations Responding to Peripheral Nerve Injury in Conditioning-Lesion Enhanced Regeneration in vivo

Talsma, Aaron David 27 January 2023 (has links)
No description available.
20

CCL2 (MCP-1) MEDIATES CHRONIC PELVIC PAIN THROUGH MAST CELLS IN EXPERIMENTAL AUTOIMMUNE CYSTITIS

Bicer, Fuat 28 August 2012 (has links)
No description available.

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