Effects of Dachengqi Decoction () on morphological changes in enteric nerve system of rats with multiple organ dysfunction syndrome / 中国结合医学杂志

<p><b>OBJECTIVE</b>To observe the morphological changes in enteric nerve system (ENS) of rats with multiple organ dysfunction syndrome (MODS) treated by Dachengqi Decoction (, DCQD).</p><p><b>METHODS</b>Fifty Wistar rats were randomly assigned to the control group, MODS model group and DCQD treated group. The rats in MODS model group and DCQD treated group were injected Escherichia coli (E. coli) suspension into abdominal cavity under sterile condition. The DCQD treated group was gavaged with DCQD 2 days before the E. coli suspension was injected. Twenty-four hours after injection, the proximal segment of intestine was resected and studied by immunohistofluorescence using vesicular acetylcholine transporter, vasoactive intestinal polypeptide (VIP), substance P (SP) and neuronal nitric oxide synthase (nNOS) antibodies. The whole-mount preparations were observed by laser scanning confocal microscope to detect the changes of quantity and fluorescence integral optical density (IOD) value of intestine enteric nerves.</p><p><b>RESULTS</b>Compared with the control group, the quantity and IOD value of acetylcholine (ACh), VIP, SP and nitric oxide (NO) nerves of intestine in the MODS group were significantly decreased (P<0.01), and the network of enteric nerves was remarkably disrupted. Compared with the MODS group, the quantity and fluorescence IOD value of ACh, VIP, SP and NO nerves in the DCQD group were significantly increased (P<0.01), and the network of enteric nerves was remarkably recovered.</p><p><b>CONCLUSION</b>DCQD can protect and repair damage in the network of ACh, SP, NO and VIP nerves in rats with MODS, which may be one of mechanisms involved in promoting gastrointestinal motility by DCQD.</p>

Repair of xiangsha liujunzi decoction on damage of interstitial cells of cajal and gap junction in the gastric muscular layer of rats of Pi-Qi deficiency syndrome: an experiment study / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To explore the repair of Xiangsha Liujunzi Decoction (XSLJZD) on interstitial cells of Cajal (ICC) and gap junction (GJ) in the gastric muscular layer of rats of Pi-qi deficiency syn- drome (PQDS).</p><p><b>METHODS</b>PQDS was established using purgative method with bitter and cold drugs in 30 healthy Wistar rats. After successful modeling they were randomly divided into the treatment group and the model group, 15 in each group. Another 15 healthy Wistar rats were recruited as the healthy control group. Rats in the treatment group were gastric administered with XSLJZD at 2 mL/100 g body weight, once daily for 14 successive days. Equal volume of normal saline was gastrically administered to those in the healthy control group and the model group. The gastric muscle tissues were taken out before modeling, before intervention, and after intervention, respectively. Ultrastructural changes of ICC and GJ were observed using transmission electron microscope (TEM). The number and distribution of Connexin43 (Cx43) were detected using immunohistochemistry.</p><p><b>RESULTS</b>Results of TEM indicated that compared with the healthy control group, both ICC and GJ in the model group showed obvious injury. ICC and GJ were apparently repaired after intervention in the treatment group. Compared with the same group before modeling, the integrated optical density (IOD) of the Cx43 expression significantly decreased in the model group before and after intervention (P <0.05). Compared with before intervention, the IOD of the Cx43 expression significantly increased in the treatment group (P <0.05). Compared with the healthy control group, the IOD of the Cx43 expression significantly decreased in the model group before and after intervention (P <0.05). Compared with the model group, the IOD of the Cx43 expression significantly increased in the treatment group (P <0.05).</p><p><b>CONCLUSIONS</b>Ultrastructures of ICC and GJ in the gastric muscular layer of rats of PQDS were obviously damaged. XSLJZD could repair the structural damage of ICC and GJ in the gastric muscle tissues of rats of PQDS.</p>

Intervention effect of Dachengqi Granule on apoptosis of small intestine smooth muscle cells in rats with multiple organ dysfunction syndrome / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To observe the intervention of Dachengqi Granule (DG) on the apoptosis of small intestine smooth muscle cells (SMCs) in rats with multiple organ dysfunction syndrome (MODS) and its mechanisms.</p><p><b>METHODS</b>Healthy 100 adult Wistar rats were randomly divided into the control group (n =20), the MODS model group (n =40), and the DG group (n =40).E. coli suspension was peritoneally injected to rats in the model group and the DG group to establish bacterial peritonitis induced MODS model. DG at 1 mL/100 g was administered by gastrogavage to rats of the DG group, twice daily for 3 successive days. Twenty-four hours after modeling, the proximal segment of intestine was taken and stained by using terminal-deoxynucleotidyl transferase mediated nick end labeling (TUNEL) and immunohistochemistry. Changes of apoptosis quantity of SMCs and the expression of Bcl-2 associated X protein (Bax), B cell lymphoma/leukemia-2 (Bcl-2) and cytochrome c protein (Cyt c) in mitochondrial apoptotic signaling pathway were observed.</p><p><b>RESULTS</b>Compared with the control group, the apoptosis quantity of SMCs and the expression of Bax and Cyt c protein significantly increased, and the expression of Bcl-2 protein significantly decreased in the MODS model group (P <0.01). Compared with the MODS model group, the apoptosis quantity of SMCs and the expression of Bax and Cyt c proteins significantly decreased, and the expression of Bcl-2 protein significantly increased in the DG group (allP <0.01).</p><p><b>CONCLUSION</b>DG could inhibit apoptosis of SMCs through suppressing activation of mitochondrial apoptotic signaling pathway in intestinal SMCs, thus promoting the recovery of the gastrointestinal motility function in rats with MODS.</p>

Morphological changes in network of enteric nerve-interstitial cells of Cajal-smooth muscle cells in rats with multiple organ dysfunction syndrome and therapeutic effects of Dachengqi decoction (大承气汤) / 中国结合医学杂志

<p><b>OBJECTIVE</b>To observe the effects of Dachengqi Decoction (大承气汤, DCQD) on morphological changes in the network of enteric nerve-interstitial cells of Cajal (ICCs)-smooth muscle cells (SMC) of enteric deep muscular plexuses (DMP) in the rats with multiple organ dysfunction syndrome (MODS).</p><p><b>METHODS</b>One hundred Wistar rats of both sexes weighing 200 to 250 g were randomly divided into the control group, MODS group, and DCQD group. The morphologic changes of enteric nerve-ICC-SMC network in the DMP of intestine was observed using c-Kit and vesicular acetylcholine transporter/neuronal nitric oxide synthase immunohistochemical double-staining with whole-mount preparation technique, confocal laser scanning microscopy, and electron microscopy.</p><p><b>RESULTS</b>Compared with the control group, the distribution and densities of cholinergic/nitrergic nerves and ICC in the DMP (ICC-DMP) of intestine in the MODS group were significantly decreased (P<0.01), and the network of cholinergic nerve-ICC-SMC was disrupted; and the ultrastructural features of ICC-DMP, enteric nerve, and SMC were severely damaged. After treatment with DCQD, the damage in the network of enteric nerve-ICC-SMC was significantly recovered. Compared with the MODS group, the distribution and densities of cholinergic/nitrergic nerves and ICC-DMP in the DCQD group were significantly increased (P<0.01); and the ultrastructural features of ICC-DMP, enteric nerve, smooth muscle cells were significantly recovered.</p><p><b>CONCLUSIONS</b>DCQD can improve the gastrointestinal motility in MODS. The mechanism may be related to the effect of repairing the damages in the network of enteric nerve-ICC-SMC.</p>

Effect of emodin on motility signal transduction in colonic smooth muscle cells in rats with multiple organ dysfunction syndrome / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To observe the effect of emodin on motility signal transduction and calcium ion in colonic smooth muscle cells (SMC) in rats with bacterial peritonitis caused multiple organ dysfunction syndrome (MODS).</p><p><b>METHODS</b>Observation was conducted in colon of MODS model rats on (1) effects of emodin on the contraction of muscular strip and cells of colonic smooth muscle, and influences of specific myoglobulin light chain kinase inhibitor (ML-7) and selective proteinkinase C inhibitor (Calphostin C) on these effects; and (2) effect of emodin on calcium ion in SMC.</p><p><b>RESULTS</b>Emodin could directly contract the muscular strip and cells of smooth muscle; ML-7 and Calphostine could inhibit these contractile action to some extent. Under MODS condition, emodin could still increase the intracellular calcium ion concentration; this effect could be inhibited by heparin (inosamine triphosphate receptor inhibitor IP3 and ryanodine receptor inhibitor in MODS model but the calcium chelator EGTA and nifedipine (the specific cell membrane voltage dependent calcium channel blocker) showed no influence on it.</p><p><b>CONCLUSION</b>Emodin could directly contract the colonic smooth muscle in MODS model rats, which is mediated by raise the signal path MLCK of calcium ion and the PKCa path for increase calcium sensibility. The mechanism of increasing calcium ion is mainly through IP3 and RyR the two calcium ion channel receptor in the sarcoplasm.</p>

Effect of dachengqi granule on human gastrointestinal motility / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To study the therapeutic effect and mechanism of Dachengqi granule (DCQG) on some digestive motility disturbed diseases.</p><p><b>METHODS</b>Gastroduodenojejunal manometry, electrogastrography (EGG), RIA of motilin and orocecal transit time test were applied to directly observe the effect of DCQG on human gastrointestinal motility.</p><p><b>RESULTS</b>DCQG could significantly improve the postoperational EGG disorder, elevate the amplitude and time of migrating motor complex (MMC) phase III, prevent gastrointestinal reversed peristalsis, increase the blood level of motilin, decrease the orocecal transit time, and promote the recovery of gastrointestinal motility.</p><p><b>CONCLUSION</b>DCQG is an effective digestive kinetic agent, which could be medicated conveniently in treating digestive motility disturbed diseases.</p>