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19 protocols using c57bl 6j apcmin mice

1

Apc(Min/+) Mice for Cancer Research

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ApcMin/+ (C57BL/6J) mice were developed by Jackson Laboratories (Bar Harbor, Maine, USA). In this study, C57BL/6J mice were purchased from Japan SLC (Shizuoka, Japan) and sacrificed by cervical dislocation immediately before experiments. All animal experiments conformed to the Guide for the Care and Use of Laboratory Animals and were approved by the Institutional Committee of Laboratory Animal Experimentation and Research Ethics Committee of Nagasaki International University. This article does not contain any experiments with human subjects performed by any of the authors. Mice were maintained under specific pathogen-free conditions in the animal experimentation facility at Nagasaki International University, with temperature and lighting controlled throughout the experimental period. Mice were provided with food and water ad libitum.
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2

ApcMin/+ Mice for Intestinal Cancer

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ApcMin/+ C57BL/6J mice were obtained from the Jackson Laboratory and crossed into ApcMin/+ mice and wild-type littermates. All animals were kept under specific pathogen-free conditions in filter-top cages. Genotyping was performed at 4 weeks by PCR for AhRfl/fl mice and villin-CreER mice, as described previously 27 (link),28 (link). We subsequently crossed mice with a floxed AhR-/-Cre locus to ApcMin/+ mice to restrict AhR deficiency to ApcMin/+ mice.
In total, all the mice were obtained from Shanghai Super-B&K Animal Laboratory Co., Ltd. (Shanghai, China) with Certification No. SCXK 2016-0016. All animals were housed under specific pathogen-free conditions in accordance with the Chinese Experimental Animals Administration Legislation.
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3

UAT-B Impacts Intestinal Tumorigenesis

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C57BL/6J-APCmin/+ mice were obtained from Jackson Laboratory. Eight-week-old male mice of the same parental generation were divided into two groups that received 1 mg/kg UAT-B or vehicle via intraperitoneal injection every other day. The mice were sacrificed and tumors of longitudinal dissection of the small intestine and colon were imaged. Tumor numbers were calculated. Then, the small intestines and colons were sectioned and stained with immunohistochemistry. The survival time of mice after UAT-B treatment was recorded.
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4

Generating Apc^Min/+;P-sel^-/- Mice

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C57BL/6J-ApcMin/+ mice were purchased from the Jackson Laboratory. Male ApcMin/+ mice were mated with female P-sel-/- mice on the C57BL/6J background to obtain ApcMin/+;P-sel+/- mice. To generate ApcMin/+;P-sel-/- mice, the ApcMin/+;P-sel+/- mice were backcrossed with P-sel-/- mice. Their genotypes were identified by PCR using the following primers: ApcMin/+, GCCATCCCTTCACGTTAG, TTCCACTTTGGCATAAGGC and TTCTGAGAAAGACAGAAGTTA; and P-selectin, CTGAATGAACTGCAGGACGA, ATACTTTCTCGGCAGGAGCA, TTGTAAATCAGAAGGAAGTGG and AGAGTTACTCTTGATGTAGATTCC.
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5

Colorectal Adenoma Prevention in Mice

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The animal experiment was performed as reported earlier [9] (link). Briefly, 4–6 week old heterozygous female and male C57BL/6J-ApcMin/+ mice (Jackson Laboratories) were fed with either 2500 mg/kg 5-ASA (A3537, Sigma-Aldrich) mixed into the chow or with a control diet (C1000, Altromin). The 5-ASA dose corresponds to the intake of 3 g/day in humans [18] (link). After 12 weeks the mice were euthanized, the whole gut dissected and coiled up to a Swiss roll. The intestine was fixed in neutral buffered formalin (10%) for 24 h and embedded in paraffin.
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6

ApcMin/+ Mice Dietary Intervention

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Eighteen male C57BL/6J ApcMin/+ mice (Jackson laboratories, Bar Harbor, ME, USA) were obtained at 5 weeks of age. Upon arrival, mice were acclimated for 24 h before being randomly assigned to treatment groups (n = 9/group). Dietary treatment lasted for 10 weeks, at which point mice were sacrificed, tumor and non-tumor intestinal tissues collected, and analyses performed. Mice were housed individually in microisolator cages in a room controlled for temperature (21 ± 1 °C), humidity, and light (12 h light:dark cycle). Mice consumed water and food ad libitum. Food intake and overall health were monitored once every three days, as fresh diet was provided and uneaten/spilled food was measured on the same schedule. Body weights were monitored weekly. All animal procedures followed the Institutional Animal Care and Use Committee procedures at Case Western Reserve University (CWRU), in accordance with the NIH guidelines.
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7

Ginsenoside Effects on Apc^Min/+ Mice

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Heterozygous male ApcMin/+ (C57BL/6J-ApcMin/+) mice were purchased from Jackson Laboratory. Mice were housed in a 12-h light–dark cycle facility and were fed with PicoLab®Rodent Diet 20-5053 (LabDiet, USA). All the mice had free access to food and water. Ginsenoside Rb3 (Purity 99.65%) and ginsenoside Rd (Purity 99.23%) were purchased from Man-Si-Te biological technological CO., Ltd (Chengdu, China). Rb3 and Rd were dissolved in 0.5% carboxymethyl cellulose (CMC). Total 32 male ApcMin/+ mice (aged 6 weeks) were divided into three groups; 10 mice in the control group and 22 mice equally divided for Rb3 and Rd treatments. The mice  were daily gavage with a single dose of Rb3 or Rd at 20 mg/kg, or solvent control. The treatments were carried out for 8 consecutive weeks. The dosage was chosen based on our previous results and others published reports on the mouse dosages of ginsenosides. American Veterinary Medical Association guidance was followed for carbon dioxide based euthanasia. All the experimental processes were conducted within the approved guidelines of the Ethics Review Committee for Animal Research of Macau University of Science & Technology.
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8

Evaluating Intestinal Polyp Formation in APC-Mutant Mice

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Animal procedures were performed in accordance with guidelines from the local animal ethics committee. Two cohorts with 15 C57BL/6J-APCmin/+ mice (Jackson Laboratory, Maine) each were fed control chow or PLX4720 (the laboratory tool compound for vemurafenib)-infused (high dose) chow (13 (link)) for 28 days. Upon sacrifice, small intestine and colon were cut open length-wise, and polyp number and size were evaluated in a blinded fashion for proximal small intestine (PSI), distal small intestine (DSI), and colon using a Nikon SMZ645 microscope. Wild type C57Bl6 mice were treated with control and PLX chow for 6 months and sacrificed. All gastrointestinal tracts were formalin fixed, and paraffin embedded. Immunohistochemistry for phospho-ERK, and beta-catenin, was performed as previously described (14 (link)) using the following antibodies: phospho-ERK (Cell Signaling 4370); beta-catenin (Cell Signaling 9562). Stained slides were evaluated for histological features of mouse intestinal polyps, the number of polyps, and nuclear phospho-ERK and β-catenin were scored in a blinded fashion. For the latter, a polyp with a well oriented section, permitting evaluation of luminal and basal epithelium and with the highest proportion of nuclear staining was given an estimated percentage of positive nuclei in the polyp.
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9

Intestinal Adenoma Analysis in ApcMin Mice

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C57BL/6J-ApcMin mice (stock number 002020) were from the Jackson Laboratory (Sacramento, CA). The presence and morphology of intestinal adenomas were confirmed by H&E staining and by immunohistochemical (IHC) analysis for either Deptor, β-catenin or c-Myc.
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10

Murine Intestinal Tumor Model Characterization

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C57BL/6J and C57BL/6J-ApcMin/+ mice were obtained from The Jackson Laboratory. C57BL/6J/Sv129-M-lyslys-EGFP/lys-EGFP mice (18 (link)) were obtained from Albert Einstein College of Medicine. All mice were bred in-house, kept under isolator conditions at temperatures between 19 and 23°C on a 12-h light-dark cycle. They were pathogen-free by regular bacteriological and serological testing. Relative humidity was kept between 45 and 55%. The mice were fed on mouse complete maintenance diet with free access to food and water. For the experiments described here, the following mice were utilized: Apc+/+M-Lys+/+ (n=20), ApcMin/+M-Lys+/+ (n=23), Apc+/+M-Lyslys-EGFP/+ (n=9) And ApcMin/+M-Lyslys-EGFP/+ (n=12).
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