Differential Role of Cyclooxygenase 1 and 2 Isoforms in the Modulation of Colonic Neuromuscular Function in Experimental Inflammation

2006 ◽  
Vol 317 (3) ◽  
pp. 938-945 ◽  
Author(s):  
Matteo Fornai ◽  
Corrado Blandizzi ◽  
Luca Antonioli ◽  
Rocchina Colucci ◽  
Nunzia Bernardini ◽  
...  
2021 ◽  
Vol 28 ◽  
Author(s):  
Josiane Viana Cruz ◽  
Joaquín María Campos Rosa ◽  
Njogu Mark Kimani ◽  
Silvana Giuliatti ◽  
Cleydson Breno Rodrigues dos Santos

: This article presents a simplified view of celecoxib as a potential inhibitor in the treatment of inflammatory diseases. The enzyme cyclooxygenase (COX) has, predominantly, two isoforms called cyclooxygenase 1 (COX-1) and cyclooxygenase 2 (COX-2). The former plays a constitutive role that is related to homeostatic effects in renal and platelets, while the latter is mainly responsible for induction of inflammatory effects. Since COX-2 plays an important role in the pathogenesis of inflammatory diseases, it has been signaled as a target for the planning of anti-inflammatory intermediates. Many inhibitors developed and planned for COX-2 inhibition have presented side effects to humans, mainly in the gastrointestinal and/or cardiovascular tract. Therefore, it is necessary to design new potential COX-2 inhibitors, which are relatively safe and without side effects. To this end, of the generation of non-steroidal anti-inflammatory drugs from “coxibs”, celecoxib is the only potent selective COX-2 inhibitor that is still commercially available. Thus, the compound celecoxib became a commercial prototype inhibitor for the development of anti-inflammatory agents for COX-2 enzyme. In this review, we provide highlights where such inhibition should provide a structural basis for the design of promising new non-steroidal anti-inflammatory drugs (NSAIDs) which act as COX-2 inhibitors with lesser side effects on the human body.


1998 ◽  
Vol 114 ◽  
pp. A82
Author(s):  
T. Brzozowski ◽  
P.C. Konturek ◽  
R. Pajdo ◽  
N. Nagraba ◽  
A. Szczeklik ◽  
...  

The 3-cycles per minute (cpm) gastric pacesetter potential is a fundamental electrical phenomenon of the stomach. This low-frequency biorhythm is the basis for normal neuromuscular function of the stomach. In regard to the origins and the various neural and hormonal influences that affect the 3-cpm rhythm, many mysteries remain. Ongoing and future inquiries into the very nature of rhythmicity will provide deeper understanding of gastric myoelectrical activity and the electrical activity detected in the electrogastrogram (EGG). The role of knockout mice that lack interstitial cells of Cajal will be increasingly important in understanding the crucial role of rhythmic electrical events in normal and abnormal neuromuscular function of the stomach. These and other animal studies will also continue to help clinicians understand the deficits in gastric neuromuscular function caused by electrical dysrhythmias. A delicate balance maintains normal 3-cpm activity. Stomach electrical rhythmicity is rather unstable during fasting, for example, compared with the rhythmic 3-cpm electrical events and contractile events that occur in the postprandial period. What mechanisms produce these fasting and postprandial electrical changes? Are neural or hormonal circuits most critical? Are extrinsic or intrinsic nerves the most important? Studies of fasting and postprandial EGG activity may offer insights into sensations of hunger and satiety. The EGG signal is responsive to brain-gut interactions such as the cephalic-vagal reflex. Sham feeding studies with healthy subjects indicated that the sight, smell, and taste of food significantly increased 3- cpm activity. However, in subjects who indicated that the sham feeding experience was disgusting, no increase in 3-cpm activity occurred in this situation. Future studies of patients with eating disorders such as bulimia or anorexia nervosa using EGG recording methods may reveal new insights into the pathophysiology of eating disorders and be of value in monitoring the progress of treatment. Different EGG patterns induced by different meals reflect the different gastric neuromuscular work required to receive, mix, and empty the specific meal. Characteristics of the EGG signal from frequency to amplitude may also correlate with perceptions of stomach fullness, hunger, or satiety.


1995 ◽  
Vol 39 (8) ◽  
pp. 1019-1023 ◽  
Author(s):  
E. GARCIA ◽  
R. CALVO ◽  
J. M. RODRIGUEZ-SASIAIN ◽  
R. JIMLNEZ ◽  
I. F. TROCONIZ ◽  
...  

1999 ◽  
Vol 385 (1) ◽  
pp. 47-61 ◽  
Author(s):  
Tomasz Brzozowski ◽  
Peter Ch Konturek ◽  
Stanislaw J Konturek ◽  
Zbigniew Sliwowski ◽  
Danuta Drozdowicz ◽  
...  

2011 ◽  
Vol 65 (Suppl 1) ◽  
pp. A316-A316
Author(s):  
N. Yoshimura ◽  
S. Muraki ◽  
H. Oka ◽  
H. Kawaguchi ◽  
K. Nakamura ◽  
...  

2015 ◽  
Vol 47 ◽  
pp. 325
Author(s):  
Geoffrey L. Hartley ◽  
Cody L. Watson ◽  
Matthew J. Greenway ◽  
Philip N. Ainslie ◽  
Stephen S. Cheung

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