Abstract | BACKGROUND: METHODS: In the first experiment, rats (n = 68) received atropine 1 mg/kg or saline injection 10 min prior to LPS injection and were randomization into four 30-min treatment subgroups: LPS only control, anesthesia control, CO2 pneumoperitoneum, and helium pneumoperitoneum. In a second experiment, rats (n = 40) received atropine 2 mg/kg or saline 10 min prior to randomization into the same four subgroups described previously. In a third experiment, rats (n = 96) received atropine 2 mg/kg or saline 10 min prior to randomization into eight 30-min treatment subgroups followed by LPS injection: LPS only control; anesthesia control; and CO2 or helium pneumoperitoneum at 4, 8, and 12 mmHg. In a fourth experiment, rats (n = 58) were subjected to bilateral subdiaphragmatic truncal vagotomy or sham operation. Two weeks postoperatively, animals were randomized into four 30-min treatment subgroups followed by LPS injection: LPS only control, anesthesia control, CO2 pneumoperitoneum, and helium pneumoperitoneum. Blood samples were collected from all animals 1.5 h after LPS injection, and cytokine levels were determined by enzyme-linked immunosorbent assay. RESULTS: Serum tumor necrosis factor-alpha ( TNF-alpha) levels were consistently suppressed among the saline-CO2 pneumoperitoneum groups compared to saline-LPS only control groups (p < 0.05 for all four experiments). All chemically vagotomized animals had significantly reduced TNF-alpha levels compared to their saline-treated counterparts (p < 0.05 for all), except among the CO2 pneumoperitoneum-treated animals. Increasing insufflation pressure with helium eliminated differences (p < 0.05) in TNF-alpha production between saline- and atropine-treated groups but had no effect among CO2 pneumoperitoneum-treated animals. Finally, vagotomy (whether chemical or surgical) independently decreased LPS-stimulated TNF-alpha production in all four experiments. CONCLUSION:
|
Authors | J M Fuentes, E J Hanly, A R Aurora, A De Maio, S P Shih, M R Marohn, M A Talamini |
Journal | Surgical endoscopy
(Surg Endosc)
Vol. 20
Issue 8
Pg. 1225-32
(Aug 2006)
ISSN: 1432-2218 [Electronic] Germany |
PMID | 16865627
(Publication Type: Journal Article, Research Support, N.I.H., Extramural)
|
Chemical References |
- Lipopolysaccharides
- Parasympatholytics
- Tumor Necrosis Factor-alpha
- Carbon Dioxide
- Atropine
|
Topics |
- Animals
- Atropine
(pharmacology)
- Carbon Dioxide
- Cholinergic Fibers
- Immune System
(physiopathology)
- Laparoscopy
- Lipopolysaccharides
(pharmacology)
- Male
- Nerve Block
- Neural Pathways
(physiopathology)
- Parasympathetic Nervous System
(physiopathology)
- Parasympatholytics
(pharmacology)
- Physical Stimulation
- Pneumoperitoneum, Artificial
- Rats
- Rats, Sprague-Dawley
- Tumor Necrosis Factor-alpha
(antagonists & inhibitors, metabolism)
- Vagotomy
- Vagus Nerve
(drug effects)
|