scholarly journals P034 Preliminary evidence for a role of the renin angiotensin system in intestinal fibrosis in Crohn's disease using angiotensin receptor immunohistochemistry

2014 ◽  
Vol 8 ◽  
pp. S78
Author(s):  
S. Ray ◽  
J. Soeda ◽  
J. Oben ◽  
J. Sanderson
2018 ◽  
Vol 453 (1-2) ◽  
pp. 103-110 ◽  
Author(s):  
Zheng Zhang ◽  
Shi-min Jiang ◽  
Ye-ping Ma ◽  
Pei-lin Dai ◽  
Yi-ning Wang ◽  
...  

Author(s):  
Si-Nan Lin ◽  
Ren Mao ◽  
Chenchen Qian ◽  
Dominik Bettenworth ◽  
Jie Wang ◽  
...  

Intestinal fibrosis is considered an inevitable complication of Crohn's disease (CD) that results in symptoms of obstruction and stricture formation. Endoscopic or surgical treatment is required to treat the majority of patients. Progress in the management of stricturing CD is hampered by the lack of effective anti-fibrotic therapy; however, this situation is likely to change because of recent advances in other fibrotic diseases of the lung, liver and skin. In this review, we summarized data from randomized controlled trials (RCT) of anti-fibrotic therapies in these conditions. Multiple compounds have been tested for the anti-fibrotic effects in other organs. According to their mechanisms, they were categorized into growth factor modulators, inflammation modulators, 5-hydroxy-3-methylgultaryl-coenzyme A (HMG-CoA) reductase inhibitors, intracellular enzymes and kinases, renin-angiotensin system (RAS) modulators and others. From our review of the results from the clinical trials and discussion of their implications in the gastrointestinal tract, we have identified several molecular candidates that could serve as potential therapies for intestinal fibrosis in CD.


Author(s):  
Ю.Н. Быков ◽  
Н.А. Тетюшкин ◽  
В.А. Чипизубов ◽  
А.Н. Калягин ◽  
С.Ю. Лаврик

Введение. В настоящее время в научной литературе имеется большой объем данных, посвященных болезни Паркинсона. В то же время недостаточно освещена роль ренин-ангиотензиновой системы (РАС) в патогенезе заболевания. Цель - оценка современных патогенетически обоснованных подходов к терапии болезни Паркинсона. Методика. В базах данных Medline (PubMed) и eLibrary осуществлен подбор и анализ современных источников литературы, посвященных изучению роли ренин-ангиотензиновой системы в патогенезе болезни Паркинсона. Результаты. Болезнь Паркинсона является хроническим нейродегенеративным заболеванием, которое проявляется моторными и немоторными нарушениями. Анализ литературы показал, что помимо системной ренин-ангиотензиновой системы во многих тканях и органах имеется локальная РАС. Авторами было показано, что дофамин и ангиотензин II взаимодействуют в черной субстанции (SN) и стриатуме в реципрокном отношении. В модельных экспериментах на животных доказано, что снижение уровней дофамина сопровождается гиперактивацией ренин-ангиотензиновой системы. При этом так же отмечается выброс активных форм кислорода, индуцируемый микроглиальной тканью, и развитие нейровоспаления, что сопровождается нейродегенерацией. Применение блокаторов ангиотензиновых рецепторов в моделях на животных и в клинических испытаниях позволило значительно снизить прогрессирование нейродегенерации черной субстанции. Заключение. Авторами изложены результаты, свидетельствующие о том, что развитие болезни Паркинсона сопровождается гиперактивацией мозговой РАС. Подразумевается, что на новое звено патогенеза можно терапевтически воздействовать. Необходимы дополнительные исследования для понимания механизмов данных процессов. Background. A large amount of literature on Parkinson’s disease is currently available. However, the role of the renin-angiotensin system in the pathogenesis of this disease is not sufficiently covered. Aim. To highlight new therapeutic possibilities based on pathophysiological mechanisms of Parkinson’s disease. Methods. The literature retrieved from the PubMed, Medline, and eLibrary databases focusing on the role of the renin-angiotensin system in the pathogenesis of Parkinson’s disease was analyzed. Results. Parkinson’s disease (PD) is a chronic neurodegenerative disease associated with persistent neurological disorders. Studies have demonstrated that a local renin-angiotensin system (RAS) exists in many tissues and organs along with the systemic RAS. The authors showed that dopamine and angiotensin II interact reciprocally in the substantia nigra (SN) and striatum. In animal models, a decrease in the dopamine level was accompanied by RAS overactivation. Furthermore, microglial tissue induced production of reactive oxygen species, which was associated with neuroinflammation. The angiotensin receptor blocker treatment used in animal models and clinical trials significantly reduced the progression of SN neurodegeneration. Conclusions. The authors reviewed the data of literature demonstrating that the progression of Parkinson’s disease is associated with overactivation of the cerebral RAS. Apparently, it is possible to influence therapeutically this new pathogenetic component of Parkinson’s disease. Further study is required for understanding the mechanisms of this process.


2001 ◽  
Vol 21 (6) ◽  
pp. 580-592 ◽  
Author(s):  
Arnold Boonstra ◽  
Dick de Zeeuw ◽  
Paul E. de Jong ◽  
Gerjan Navis

2020 ◽  
Vol 27 (6) ◽  
pp. 520-528 ◽  
Author(s):  
Izabela Guimarães Barbosa ◽  
Giulia Campos Ferreira ◽  
Diomildo Ferreira Andrade Júnior ◽  
Cássio Rocha Januário ◽  
André Rolim Belisário ◽  
...  

Bipolar Disorder (BD) is a chronic a multifactorial psychiatric illness that affects mood, cognition, and functioning. BD is associated with several psychiatric conditions as well clinical comorbidities, particularly cardiovascular diseases. The neurobiology of BD is complex and multifactorial and several systems have been implicated. Considering that the Renin Angiotensin System (RAS) plays an important role in cardiovascular diseases and that recently evidence has suggested its role in psychiatric disorders, the aim of the present study is to summarize and to discuss recent findings related to the modulation of RAS components in BD. A systematic search of the literature using the electronic databases MEDLINE and LILACS was conducted through March 2019. The search terms were: “Bipolar Disorder”; “Renin Angiotensin System”; “Angiotensin 2”; “Angiotensin receptors”; “Angiotensin 1-7”; “ACE”; “ACE2”; “Mas Receptor”. We included original studies assessing RAS in BD patients. Two hundred twenty-two citations were initially retrieved. Eleven studies were included in our systematic review. In the majority of studies (6 of 8), the ACE insertion/deletion (I/D) polymorphism did not differ between BD patients and controls. BD patients presented higher plasma renin activity in comparison with controls. The studies evaluating the RAS molecules in BD are very scarce and heterogeneous. The literature suggests a potential role of RAS in BD. Further studies are necessary to investigate this relationship.


2004 ◽  
Vol 181 (4) ◽  
pp. 549-559 ◽  
Author(s):  
B. L. Jensen ◽  
J. Stubbe ◽  
K. Madsen ◽  
F. T. Nielsen ◽  
O. Skott

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