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- W2794392911 abstract "Abstract Background Gastrointestinal ( GI ) dysmotility is common in patients with cancer. There are a few studies about the myenteric plexus in the presence of anatomically remote tumors. Methods Forty‐eight male Wistar rats were divided into a control ( CT ) or Walker‐256 ( TW ) group. Tumor cells were subcutaneously injected and saline was injected in the CT group. After 14 days, the small and large intestines were removed for histochemical analysis. The macroscopic morphology of the intestines and the fecal excretion were also observed. Key Results The upper GI transit and weight of fecal pellets were reduced and the walls of the large intestine in tumor‐bearing rats showed multiple constrictions. In the capsules’ constitution of the myenteric plexus of the TW group, there were type III collagen fibers in addition to type I fibers, and the thin septa inside the capsule were absent. The large intestine in the TW group exhibited smaller neurons and the number of nitrergic‐positive neurons was also reduced in the myenteric plexus, compared to the CT group. In the TW group, the neuronal numbers and the staining intensity of acetylcholinesterase ( AC hE) were reduced in the large intestine. Staining was not different in the small intestine. Conclusions and Inferences This study showed that the Walker‐256 tumor induced alterations in the morphology of nitrergic and cholinergic neurons in the myenteric plexus and decreased the upper GI transit with the presence of multiple constrictions in the colon. Therefore, these alterations can interfere on neurotransmission and can be related to the intestinal motility alterations observed in tumor‐bearing rats." @default.
- W2794392911 created "2018-03-29" @default.
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- W2794392911 date "2018-03-15" @default.
- W2794392911 modified "2023-10-14" @default.
- W2794392911 title "Walker-256 tumor alters morphology of intestinal myenteric plexus in rats" @default.
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- W2794392911 doi "https://doi.org/10.1111/nmo.13322" @default.
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