Effects of neurotrophins on gastrointestinal myoelectric activities of rats
| Autor: | Li-Kun Yan, Xi-Lin Dong, Lei Dong, Ning-Li Chai, Jian-Hua Wang, Ke-Xin Du, Zongfang Li |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Male
medicine.medical_specialty Neurotrophin-3 Rats Sprague-Dawley Jejunum Mice Neurotrophin 3 Digestive System Physiological Phenomena Neurotrophic factors Internal medicine Nerve Growth Factor medicine Animals Humans Migrating motor complex Myoelectric Complex Migrating biology Electromyography business.industry Brain-Derived Neurotrophic Factor Stomach Gastroenterology Transverse colon General Medicine Anatomy Recombinant Proteins Rats medicine.anatomical_structure Endocrinology Nerve growth factor nervous system biology.protein Duodenum Female Brief Reports business Digestive System |
| Zdroj: | World Journal of Gastroenterology. 9:1874 |
| ISSN: | 1007-9327 |
| DOI: | 10.3748/wjg.v9.i8.1874 |
| Popis: | AIM: To observe the effects of mouse nerve growth factor (NGF), rat recombinant brain derived neurotrophic factor (rm-BDNF) and recombinant human neurotrophin-3 (rh-NT-3) on the gastrointestinal motility and the migrating myoelectric complex (MMC) in rat. METHODS: A randomized, double-blinded, placebo-controlled experiment was performed. 5-7 days after we chronically implanted four or five bipolar silver electrodes on the stomach, duodenum, jejunum and colon, 21 experimental rats were coded and divided into 3 groups and injected NGF, rm-BDNF, rh-NT-3 or placebo respectively via tail vein at a dose of 20 μg·kg- 1. The gastrointestinal myoelectrical activity was recorded 2 hours before and after the test substance infusions in these consciously fasting rats. RESULTS: The neurotrophins-induced pattern of activity was characterized by enhanced spiking activity of different amplitudes at all recording sites, especially in the colon. In the gastric antrum and intestine, only rh-NT-3 had increased effects on the demographic characteristics of electrical activities (P < 0.05), but did not affect the intervals of MMCs. In the colon, all the three kinds of neurotrophins could significantly increase the frequency, amplitude and duration levels of spike bursts, and also rh-NT-3 could prolong the intervals of MMC in the transverse colon (25 ± 11 min vs 19 ± 6 min, P < 0.05). In the distal colon rh-NT-3 could evoke phase III-like activity and disrupt the MMC pattern, which was replaced by a continuously long spike bursts (LSB) and irregular spike activity (ISA) for 48 ± 6 min. CONCLUSION: Exogenous neurotrophic factors can stimulate gut myoelectric activities in rats. |
| Databáze: | OpenAIRE |
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