Navigation Links
What is the effect of fluoxetine on mast cell?
Date:12/23/2008

Mast cells are now recognized as "granular cells of the connective tissue", whose activation exacerbates allergic immune responses and as key players in the establishment of innate immunity as well as modulators of adaptive immune responses. The role of mast cells in the gastrointestinal mucosa is not only to react to antigens, but also to actively regulate the barrier and transport properties of the intestinal epithelium. In clinical studies, it has become clear that psychological factors, especially anxiety and depression, play an important role in gastrointestinal diseases by precipitating exacerbation of symptoms. Fluoxetine hydrochloride (fluoxetine) is a kind of selective serotonin reuptake inhibitors (SSRIs), which belong to a class of antidepressants used in the treatment of depression and anxiety disorders.

The research team led by He-Shen Luo, from the Renmin Hospital of Wuhan University of China, investigated the effects of fluoxetine on mast cell morphology and rMCP-1 expression in gastric antrum in a rat model of depression. This will be published on December 7, 2008 in the World Journal of Gastroenterology.

A Sprague-Dawley rat model of chronic stress-induced depression was established. Fifty experimental rats were randomly divided into the five groups: normal control group, fluoxetine + normal control group, depressed model group, saline + depressed model group, and fluoxetine + depressed model group. Laser scanning confocal microscopy (LSCM) immunofluorecence and RT-PCR techniques were used to investigate rMCP-1 expression in gastric antrum. Mast cell morphology was observed under transmission electron microscopy.

They found that depression induced mast cell proliferation, activation, and granule hyperplasia. Compared with the normal control group, the average immunofluorescence intensity of gastric antrum rMCP-1 significantly increased in depressed model group (37.4 7.7 vs 24.5 5.6, P < 0.01) or saline + depressed model group (39.9 5.0 vs 24.5 5.6, P < 0.01), while there was no significant difference between fluoxetine + normal control group (23.1 3.4) or fluoxetine + depressed model group (26.1 3.6) and normal control group. The average level of rMCP-1mRNA of gastric antrum significantly increased in depressed model group (0.759 0.357 vs 0.476 0.029, P < 0.01) or saline + depressed model group (0.781 0.451 vs 0.476 0.029, P < 0.01 ), while no significant difference was found between fluoxetine + normal control group(0.460 0.027) or fluoxetine + depressed model group (0.488 0.030) and normal control group. Fluoxetine showed partial inhibitive effects on mast cell ultrastructural alterations and de-regulated rMCP-1 expression in gastric antrum of the depressed rat model.

These findings will conduce to understand that chronic heterotypic stress may induce the immune responses in gastric mucosa. Treatment with fluoxetine can ameliorate pathological changes in gastric antrum of depressed rat model, suggesting that SSRIs are an effective therapeutic agent for some gastroduodenal diseases caused by psychological factors.


'/>"/>

Contact: Lai-Fu Li
wjg@wjgnet.com
0086-105-908-0039
World Journal of Gastroenterology
Source:Eurekalert

Related medicine news :

1. New study shows that a cough medicine ingredient could effectively treat prostate cancer
2. Common treatment for mens pelvic pain proves ineffective, Queens-led study shows
3. Experts Say Blood Sugar Guidelines Remain Effective
4. Cardiac stent patients with diabetes may benefit from drug that counteracts the effects of leptin
5. The Obama Effect: New Job Trends to Watch in 2009
6. MRI scans can predict effects of MS flare-ups on optic nerve
7. The profound effects of numbing agents
8. Precision Optics Corporation to Effect Reverse Split and Ticker Symbol Change
9. Treadmill Desks More Effective in Decreasing Prostate Cancer Risks Than Vitamin and Antioxidant Supplements
10. New Resource for No Side Effect Drugs
11. New therapy prevents dangerous side effect for lymphoma patients
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/8/2016)... ... 08, 2016 , ... Russ DiGilio , founder and ... #QuackGivesBack campaign which supported local breast cancer organizations during National Breast Cancer Awareness ... Back initiative, and we’re very pleased with the participation in every franchisee’s ...
(Date:12/8/2016)... , ... December 08, 2016 , ... CURE Media Group, ... and advocacy groups, has aligned with Upstage Lung Cancer in efforts to combat lung ... announcement, Michael J. Hennessy, Jr said, “CURE Media Group is honored to team up ...
(Date:12/8/2016)... Fla (PRWEB) , ... December 08, 2016 , ... ... smarter modes of access for customers and employees that are both engaging and ... 7 with Service Smart Technology, the software company revealed today its plans to ...
(Date:12/8/2016)... ... 08, 2016 , ... STAT courier is pleased to announce that due to ... they are expanding their presence in Dallas. One of the most exciting parts for ... jobs to the Dallas and Forth Worth market. STAT takes pride in treating their ...
(Date:12/8/2016)... ... December 08, 2016 , ... Vida Health, the ... Series B led by Canvas Ventures . Other investors include Nokia Growth Partners ... mobile platform to serve more consumers who are managing chronic conditions or ...
Breaking Medicine News(10 mins):
(Date:12/9/2016)... 9, 2016 Research and Markets has announced ... report to their offering. ... The global travel vaccines market to grow at a ... covers the present scenario and the growth prospects of the global ... report considers the revenue generated from the sales of various vaccines ...
(Date:12/8/2016)... , Dec. 8, 2016 Australia Ophthalmic Lasers ... report, "Australia Ophthalmic Lasers Market Outlook to 2022", provides ... The report provides value, in millions of US dollars, ... segements - Excimer Lasers, Femtosecond Lasers and YAG Lasers. ... shares data for each of these market segements, and ...
(Date:12/8/2016)... KEY FINDINGS The global medical ... Various reasons for growth of the medical lifting sling ... chronic diseases, high recovery cost of injuries and government ... lifting sling refers to an assistive device that helps ... connect to the lift and hold the patient. It ...
Breaking Medicine Technology: