Thyroid Hormone Nuclear Receptor TRα1 and Canonical WNT Pathway Cross-Regulation in Normal Intestine and Cancer

A pivotal role of thyroid hormones and their nuclear receptors in intestinal development and homeostasis have been described, whereas their involvement in intestinal carcinogenesis is still controversial. In this perspective article we briefly summarize the recent advances in this field and present new data regarding their functional interaction with one of the most important signaling pathway, such as WNT, regulating intestinal development and carcinogenesis. These complex interactions unveil new concepts and will surely be of importance for translational research.

The Extensive and Expensive Impacts of HEp-2 [HeLa], Intestine 407 [HeLa], and Other False Cell Lines in Journal Publications

Cell lines are essential models for biomedical research. However, they have a common and important problem that needs to be addressed. Cell lines can be misidentified, meaning that they no longer correspond to the donor from whom the cells were first obtained. This problem may arise due to cross-contamination: the accidental introduction of cells from another culture. The contaminant, which is often a rapidly dividing cell line, will overgrow and replace the original culture. The end result is a false cell line, also known as a misidentified or imposter cell line. False cell lines may come from an entirely different species, tissue, or cell type than the original donor. If undetected, false cell lines produce unreliable and irreproducible results that pollute the biomedical literature and threaten the development of reliable drug discovery and meaningful patient treatments. The goal of this study was to ascertain how widespread this problem is and how it affects the literature, as well as to estimate how much funding has been used to produce pools of scientific literature of questionable value. We focus on HEp-2 [HeLa] and Intestine 407 [HeLa], two false cell lines that are widely used in the scientific literature but were shown to be cross-contaminated in 1967. These two cell lines have been used in 8497 and 1397 published articles and extensively described as laryngeal cancer and normal intestine, respectively, rather than their true identity: the cervical cancer cell line HeLa. Discussed are tools, approaches, and resources that can address this issue—both retrospectively and prospectively.

Application of a temporary intestinal storage device in a small intestine gunshot wound dog model

Background: We aimed to verify the feasibility of a novel temporary intestinal storage device (TISD) using a simple intestinal gunshot wound model. Methods: Ten female beagle dogs were fasted for 12 hours and anesthetized. An incision protector was inserted into a 10-cm abdominal incision. The small intestine was exposed to the body by natural drooping. An automatic rifle was used to shoot the intestine from a distance of 25 meters to introduce a simple intestinal gunshot wound. The three phases of first aid for war injuries were followed: Care Under Fire, Tactical Field Care, and Tactical Evacuation Care. For Tactical Field Care, a novel TISD was used to reconstruct the ruptured intestine, and necrotic intestinal tissue was stored. The abdominal cavity was temporarily closed, and the abdomen was opened for exploration 4 hours after surgery. Treatment time was observed during Care Under Fire, transfer time was observed from Tactical Field Care to Tactical Evacuation Care, rescue was observed during Tactical Evacuation Care, and the treatment time of each intestinal segment was measured. After 4 hours, intestinal vitality was observed, and the heart, liver, spleen, lung, kidney, stomach, normal intestine, and necrotic intestine were examined before and 4 hours after surgery by light microscopy. The broken ends of the intestine were connected to the intestinal reconstruction device before and 4 hours after surgery and were examined by transmission electron microscopy. Results: The processing time of Care Under Fire was 41.55 ± 10.46 seconds, which is shorter than the maximum time limit of the battlefield first aid principle. Transit time from Care Under Fire to Tactical Field Care transit was 60.78 ± 15.95 seconds, which is shorter than the battlefield first aid principle. The treatment time of Tactical Field Care was 29.75 ± 5.13 minutes, and the reconstruction time of each intestinal segment was 4.44 ± 0.31 minutes. One dog died of anesthetic overdose, two died of splenic bleeding, and the rest completed all phases. The abdominal cavity was explored 4 hours after surgery, and the TISD was positioned. Intestinal tract reconstruction was normal, and no obvious necrosis was observed. Necrotic intestine had the same vitality as before storage. With light microscopy, the heart, liver, spleen, lung, kidney, and stomach showed no obvious necrosis, inflammatory cell infiltration, or necrosis of normal intestine before and after surgery. Before and 4 hours after surgery, intestinal necrosis involved local necrosis of villi and tissues, and marked inflammatory cell infiltration. Transmission electron microscopy showed that the villi of the intestinal stump connected to the TISD before surgery were intact, and no obvious necrosis was observed. The villi of the intestinal stump were moderately damaged after surgery, and focal necrosis was observed. Conclusions: The novel TISD can be used in the emergency treatment of simple small intestine gunshot wounds in beagle dogs and can prevent further deterioration after intestinal injury. Background: We aimed to verify the feasibility of a novel temporary intestinal storage device (TISD) using a simple intestinal gunshot wound model.

Usefulness of a finger-mounted tissue oximeter with near-infrared spectroscopy for evaluating the intestinal oxygenation and viability in rats

Purpose To investigate the utility of the device for evaluating intestinal oxygenation and viability using an animal model. Methods Sprague–Dawley rats underwent laparotomy under general anesthesia, and the blood vessels in the terminal ileum were clamped to create ischemia. We measured the regional tissue oxygenation saturation (rSO2) using an oximeter after 1, 3, and 6 h of vessel clamping. Ischemic tissue damage was assessed using a histological score. The intestine was reperfused after each clamping period, and intestinal rSO2 and survival rate were evaluated. Results When reperfusion was performed at 1 and 3 h after ischemia, rSO2 increased after 10 min, and it improved to the same level as for normal intestine after 1 h; all rats survived for 1 week. In contrast, after 6 h of ischemia, rSO2 did not increase after reperfusion, and all animals died within 2 days. The histological scores increased after 1 h of reperfusion, with longer clamping periods. Conclusion A finger-mounted tissue oximeter could evaluate intestinal ischemia and the viability, which is thus considered to be a promising result for future clinical application.

Fluid Shear Stress Enhances Differentiation of Jejunal Human Enteroids in Intestine-Chip

Background and Aims: There is increasing evidence that study of normal human enteroids duplicates many known aspects of human intestinal physiology. However, this epithelial cell-only model lacks the many non-epithelial intestinal cells present in the gastrointestinal tract and exposure to the mechanical forces to which the intestine is exposed. We tested the hypothesis that physical shear forces produced by luminal and blood flow would provide an intestinal model more closely resembling normal human jejunum. Methods: Jejunal enteroid monolayers were studied in the Emulate, Inc Intestine-Chip under conditions of constant luminal and basolateral flow that was designed to mimic normal intestinal fluid flow, with human umbilical vein endothelial cells (HUVECs) on the basolateral surface and with Wnt3A, R-spondin, Noggin only on the luminal surface. Results: The jejunal enteroids formed monolayers that remained confluent for 6-8 days; began differentiating at least as early as day two post-plating, and demonstrated continuing differentiation over the entire time of the study as shown by quantitative real-time polymerase chain reaction and Western blotting. These results were consistent with continual differentiation, as was shown to occur in mouse villus enterocytes. Compared to differentiated enteroid monolayers grown on Transwell inserts, enteroids exposed to flow were more differentiated but exhibited increased apoptosis and reduced carbohydrate metabolism as shown by proteomic analysis. Conclusions: This study of human jejunal enteroids-on-chip suggests that luminal and basolateral flow produce a model of continual differentiation over time and NaCl absorption that mimics normal intestine and should provide new insights in intestinal physiology.

Teknik Dasar Histologi pada Ikan Gurami (Osphronemus gouramy) [ The Basic Histology Technique of Gouramy Fish (Osphronemus gourami)]

Histology is science that learns about cell,organ, and body tissues in a microscopic condition. Whereas science that learns about morbidity or patology of a tissue that’s called as histopatology. Both of normal tissue’s structure and abnormal tissue’s stucturecan be learned by microscopic in a tissue preparation. This preparation made through processing of tissue until the preparation coloured. Then histology’s structure can be watched clearly so that make it easy to read. Field Work Practice purpose (PKL) this is to know the basic histoloy technique in fish. This Field Work Practice was held in Balai Uji Standar Karantina Ikan Pengendalian Mutu dan Keamanan Hasil Perikanan (BUSKIPM) Jl. Harapan I No. 01A Cilangkap, East Jakarta on 14th January 2013 until 14th February 2013. The method of this Field Work Practice is descriptive method by collecting data through primary data and secondary data. The histology technique in fish are tissue fixation, trimming (tissue selection), tissue dehydration, the tissue block making, tissue cutting, tissue colouring, and tissue observation. From the result got from the gourami’s tissue, there are edema and infestation of metacercaria parasites and myxosporidia in gill normal intestine tissue, normal liver tissue, and normal spleen tissue