Volume 128, Issue 1, Pages (January 2005)

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Volume 128, Issue 1, Pages 74-85 (January 2005) A major quantitative trait locus on mouse chromosome 3 is involved in disease susceptibility in different colitis models  Michelle E.A. Borm, Jianping He, Brian Kelsall, A. Salvador Peña, Warren Strober, Gerd Bouma  Gastroenterology  Volume 128, Issue 1, Pages 74-85 (January 2005) DOI: 10.1053/j.gastro.2004.10.044 Copyright © 2005 American Gastroenterological Association Terms and Conditions

Figure 1 Distribution of colitis scores in different groups of mice. One illustrative experiment out of several, each including 10 mice per group, is shown. Each dot represents a single mouse. Gastroenterology 2005 128, 74-85DOI: (10.1053/j.gastro.2004.10.044) Copyright © 2005 American Gastroenterological Association Terms and Conditions

Figure 2 Microscopic views of normal and diseased colons. Representative H&E-stained longitudinal sections of colons of (A) wild-type C3H/HeN, (B) Gnai2−/− C3H/HeN, (C) wild-type C57BL/6J, (D) Gnai2−/− C57BL/6J, (E) Gnai2−/− C3H/HeN × C57BL/6J F1, and (F–J) Gnai2−/− F2 mice, with increasing histologic scores. (Original magnification 100×.) Gastroenterology 2005 128, 74-85DOI: (10.1053/j.gastro.2004.10.044) Copyright © 2005 American Gastroenterological Association Terms and Conditions

Figure 3 Distribution of colitis in Gnai2-deficient F2 mice. The dotted line indicates the cutoff for resistant/susceptible mice. The severity of colitis follows a bimodal distribution. Also, female mice are more severely affected than male mice. Hatched bars and lines indicate male mice, solid bars and lines indicate female mice. Gastroenterology 2005 128, 74-85DOI: (10.1053/j.gastro.2004.10.044) Copyright © 2005 American Gastroenterological Association Terms and Conditions

Figure 4 Quantitative trait analysis of chromosomes 1, 3, and 9. On chromosome 1, after stratification by Gpdc1, a broad peak is found, spanning a region of approximately 30 cM, from 39 cM to 70 cM (Gpdc2). The peak has an LRS of 19.7. On chromosome 3, a very broad region shows linkage to colitis susceptibility, with the 95% confidence interval of 22 cM around the peak marker D3Mit348, which had an LRS of 32.4 (Gpdc1). After stratification by Gpdc1, on chromosome 9 a peak at 42 cM with marker D9Mit123 just reaches the significance cutoff LRS of 16.5 as indicated by the vertical line (Gpdc3). All susceptibility loci are C3H/HeN derived. Gastroenterology 2005 128, 74-85DOI: (10.1053/j.gastro.2004.10.044) Copyright © 2005 American Gastroenterological Association Terms and Conditions

Figure 5 Distribution of colitis score for different genotypes at D3Mit348 and D1Mit308. A significant difference between the C57BL/6J homozygous and C3H/HeN homozygous groups of mice for markers D3Mit348 and D1Mit308 was found. BB, homozygous for the C57BL/6J strain; BC, heterozygous; CC, homozygous for the C3H/HeN strain. Gastroenterology 2005 128, 74-85DOI: (10.1053/j.gastro.2004.10.044) Copyright © 2005 American Gastroenterological Association Terms and Conditions