Aberrant mucin assembly in mice causes endoplasmic reticulum stress and spontaneous inflammation resembling ulcerative colitis
Chad K Heazlewood, Matthew C Cook, Rajaraman Eri, Gareth R Price, Sharyn B Tauro, Douglas Taupin, David J Thornton, Chin Wen Png, Tanya L Crockford, Richard J Cornall, Rachel Adams, Masato Kato, Keats A Nelms, Nancy A Hong, Timothy H J Florin, Christopher C Goodnow, Michael A McGuckin, Chad K Heazlewood, Matthew C Cook, Rajaraman Eri, Gareth R Price, Sharyn B Tauro, Douglas Taupin, David J Thornton, Chin Wen Png, Tanya L Crockford, Richard J Cornall, Rachel Adams, Masato Kato, Keats A Nelms, Nancy A Hong, Timothy H J Florin, Christopher C Goodnow, Michael A McGuckin
Abstract
Background: MUC2 mucin produced by intestinal goblet cells is the major component of the intestinal mucus barrier. The inflammatory bowel disease ulcerative colitis is characterized by depleted goblet cells and a reduced mucus layer, but the aetiology remains obscure. In this study we used random mutagenesis to produce two murine models of inflammatory bowel disease, characterised the basis and nature of the inflammation in these mice, and compared the pathology with human ulcerative colitis.
Methods and findings: By murine N-ethyl-N-nitrosourea mutagenesis we identified two distinct noncomplementing missense mutations in Muc2 causing an ulcerative colitis-like phenotype. 100% of mice of both strains developed mild spontaneous distal intestinal inflammation by 6 wk (histological colitis scores versus wild-type mice, p < 0.01) and chronic diarrhoea. Monitoring over 300 mice of each strain demonstrated that 25% and 40% of each strain, respectively, developed severe clinical signs of colitis by age 1 y. Mutant mice showed aberrant Muc2 biosynthesis, less stored mucin in goblet cells, a diminished mucus barrier, and increased susceptibility to colitis induced by a luminal toxin. Enhanced local production of IL-1beta, TNF-alpha, and IFN-gamma was seen in the distal colon, and intestinal permeability increased 2-fold. The number of leukocytes within mesenteric lymph nodes increased 5-fold and leukocytes cultured in vitro produced more Th1 and Th2 cytokines (IFN-gamma, TNF-alpha, and IL-13). This pathology was accompanied by accumulation of the Muc2 precursor and ultrastructural and biochemical evidence of endoplasmic reticulum (ER) stress in goblet cells, activation of the unfolded protein response, and altered intestinal expression of genes involved in ER stress, inflammation, apoptosis, and wound repair. Expression of mutated Muc2 oligomerisation domains in vitro demonstrated that aberrant Muc2 oligomerisation underlies the ER stress. In human ulcerative colitis we demonstrate similar accumulation of nonglycosylated MUC2 precursor in goblet cells together with ultrastructural and biochemical evidence of ER stress even in noninflamed intestinal tissue. Although our study demonstrates that mucin misfolding and ER stress initiate colitis in mice, it does not ascertain the genetic or environmental drivers of ER stress in human colitis.
Conclusions: Characterisation of the mouse models we created and comparison with human disease suggest that ER stress-related mucin depletion could be a fundamental component of the pathogenesis of human colitis and that clinical studies combining genetics, ER stress-related pathology and relevant environmental epidemiology are warranted.
Conflict of interest statement
Competing Interests: The authors have declared that no competing interests exist.
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References
- Herrmann A, Davies JR, Lindell G, Martensson S, Packer NH, et al. Studies on the “insoluble” glycoprotein complex from human colon. Identification of reduction-insensitive MUC2 oligomers and C-terminal cleavage. J Biol Chem. 1999;274:15828–15836.
- Lidell ME, Johansson ME, Morgelin M, Asker N, Gum JR, et al. The recombinant C-terminus of the human MUC2 mucin forms dimers in Chinese-hamster ovary cells and heterodimers with full-length MUC2 in LS 174T cells. Biochem J. 2003;372:335–345.
- Godl K, Johansson ME, Lidell ME, Morgelin M, Karlsson H, et al. The N terminus of the MUC2 mucin forms trimers that are held together within a trypsin-resistant core fragment. J Biol Chem. 2002;277:47248–47256.
- Asker N, Axelsson MAB, Olofsson SO, Hansson GC. Dimerization of the human MUC2 mucin in the endoplasmic reticulum is followed by a N-glycosylation-dependent transfer of the mono- and dimers to the Golgi apparatus. J Biol Chem. 1998;273:18857–18863.
- Sheehan JK, Thornton DJ, Howard M, Carlstedt I, Corfield AP, et al. Biosynthesis of the MUC2 mucin—evidence for a slow assembly of fully glycosylated units. Biochem J. 1996;315:1055–1060.
- Gasche C, Alizadeh B, Pena A. Genotype-phenotype correlations: how many disorders constitute inflammatory bowel disease. Eur J Gastroenterol Hepatol. 2003;15:599–606.
- Silverberg M, Satsangi J, Ahmad T, Arnott I, Bernstein C, et al. Toward an integrated clinical, molecular and serological classification of inflammatory bowel disease: Report of a Working Party of the 2005 Montreal World Congress of Gastroenterology. Can J Gastroenterol. 2005;19(Suppl A):5–36.
- Gasche C, Scholmerich J, Brynskov J, D'Haens G, Hanauer S, et al. A simple classification of Crohn's disease: report of the Working Party for the World Congresses of Gastroenterology, Vienna 1998. Inflamm Bowel Dis. 2000;6:8–15.
- Sartor RB. Mechanisms of disease: pathogenesis of Crohn's disease and ulcerative colitis. Nat Clin Pract Gastroenterol Hepatol. 2006;3:390–407.
- Xavier RJ, Podolsky DK. Unravelling the pathogenesis of inflammatory bowel disease. Nature. 2007;448:427–434.
- Dvorak AM, Osage JE, Monahan RA, Dickersin GR. Crohn's disease: transmission electron microscopic studies. III. Target tissues. Proliferation of and injury to smooth muscle and the autonomic nervous system. Hum Pathol. 1980;11:620–634.
- Trabucchi E, Mukenge S, Baratti C, Colombo R, Fregoni F, et al. Differential diagnosis of Crohn's disease of the colon from ulcerative colitis: ultrastructure study with the scanning electron microscope. Int J Tissue React. 1986;8:79–84.
- Tytgat KMAJ, van der Wal JWG, Einerhand AWC, Buller HA, Dekker J. Quantitative analysis of MUC2 synthesis in ulcerative colitis. Biochem Biophys Res Commun. 1996;224:397–405.
- Van Klinken BJW, van der Wal JWG, Einerhand AWC, Buller HA, Dekker J. Sulphation and secretion of the predominant secretory human colonic mucin MUC2 in ulcerative colitis. Gut. 1999;44:387–393.
- Corfield AP, Myerscough N, Bradfield N, Corfield CDA, Gough M, et al. Colonic mucins in ulcerative colitis: evidence for loss of sulfation. Glycoconj J. 1996;13:809–822.
- Hanski C, Born M, Foss HD, Marowski B, Mansmann U, et al. Defective post-transcriptional processing of MUC2 mucin in ulcerative colitis and in Crohn's disease increases detectability of the MUC2 protein core. J Pathol. 1999;188:304–311.
- Jass JR, Walsh MD. Altered mucin expression in the gastrointestinal tract: a review. J Cell Mol Med. 2001;5:327–351.
- Podolsky DK, Isselbacher KJ. Composition of human colonic mucin. Selective alteration in inflammatory bowel disease. J Clin Invest. 1983;72:142–153.
- Tysk C, Riedesel H, Lindberg E, Panzini B, Podolsky D, et al. Colonic glycoproteins in monozygotic twins with inflammatory bowel disease. Gastroenterology. 1991;100:419–423.
- An G, Wei B, Xia B, McDaniel JM, Ju T, et al. Increased susceptibility to colitis and colorectal tumors in mice lacking core 3-derived O-glycans. J Exp Med. 2007;204:1417–1429.
- Velcich A, Yang W, Heyer J, Fragale A, Nicholas C, et al. Colorectal cancer in mice genetically deficient in the mucin Muc2. Science. 2002;295:1726–1729.
- Van der Sluis M, De Koning BA, De Bruijn AC, Velcich A, Meijerink JP, et al. Muc2-deficient mice spontaneously develop colitis, indicating that MUC2 is critical for colonic protection. Gastroenterology. 2006;131:117–129.
- Itoh H, Beck PL, Inoue N, Xavier R, Podolsky DK. A paradoxical reduction in susceptibility to colonic injury upon targeted transgenic ablation of goblet cells. J Clin Invest. 1999;104:1539–1547.
- van der Waaij LA, Kroese FG, Visser A, Nelis GF, Westerveld BD, et al. Immunoglobulin coating of faecal bacteria in inflammatory bowel disease. Eur J Gastroenterol Hepatol. 2004;16:669–674.
- Devine PL, McGuckin MA, Birrell GW, Whitehead RH, Sachdev GP, et al. Monoclonal antibodies reacting with the MUC2 mucin core protein. Br J Cancer. 1993;67:1182–1188.
- Carlstedt I, Herrmann A, Hovenberg H, Lindell G, Nordman H, et al. “Soluble” and “insoluble” mucins—identification of distinct populations. Biochem Soc Trans. 1995;23:845–851.
- Thornton DJ, Khan N, Sheehan JK. Separation and identification of mucins and their glycoforms. Methods Mol Biol. 2000;125:77–85.
- McGuckin MA, Thornton DJ. Detection and quantitation of mucins using chemical, lectin, and antibody methods. Methods Mol Biol. 2000;125:45–55.
- Hong MY, Turner ND, Carroll RJ, Chapkin RS, Lupton JR. Differential response to DNA damage may explain different cancer susceptibility between small and large intestine. Exp Biol Med (Maywood) 2005;230:464–471.
- Hinoda Y, Akashi H, Suwa T, Itoh F, Adachi M, et al. Immunohistochemical detection of MUC2 mucin core protein in ulcerative colitis. J Clin Lab Anal. 1998;12:150–153.
- Shaoul R, Okada Y, Cutz E, Marcon MA. Colonic expression of MUC2, MUC5AC, and TFF1 in inflammatory bowel disease in children. J Pediatr Gastroenterol Nutr. 2004;38:488–493.
- Altmann GG. Morphological observations on mucus-secreting nongoblet cells in the deep crypts of the rat ascending colon. Am J Anat. 1983;167:95–117.
- Marciniak SJ, Ron D. Endoplasmic reticulum stress signaling in disease. Physiol Rev. 2006;86:1133–1149.
- Ron D, Walter P. Signal integration in the endoplasmic reticulum unfolded protein response. Nat Rev Mol Cell Biol. 2007;8:519–529.
- Marciniak SJ, Yun CY, Oyadomari S, Novoa I, Zhang Y, et al. CHOP induces death by promoting protein synthesis and oxidation in the stressed endoplasmic reticulum. Genes Dev. 2004;18:3066–3077.
- Hu P, Han Z, Couvillon AD, Kaufman RJ, Exton JH. Autocrine tumor necrosis factor alpha links endoplasmic reticulum stress to the membrane death receptor pathway through IRE1alpha-mediated NF-kappaB activation and down-regulation of TRAF2 expression. Mol Cell Biol. 2006;26:3071–3084.
- Deng J, Lu PD, Zhang Y, Scheuner D, Kaufman RJ, et al. Translational repression mediates activation of nuclear factor kappa B by phosphorylated translation initiation factor 2. Mol Cell Biol. 2004;24:10161–10168.
- Delpre G, Avidor I, Steinherz R, Kadish U, Ben-Bassat M. Ultrastructural abnormalities in endoscopically and histologically normal and involved colon in ulcerative colitis. Am J Gastroenterol. 1989;84:1038–1046.
- Gonzalez-Licea A, Yardley JH. Nature of the tissue reaction in ulcerative colitis. Light and electron microscopic findings. Gastroenterology. 1966;51:825–840.
- Donnellan WL. Early histological changes in ulcerative colitis. A light and electron microscopic study. Gastroenterology. 1966;50:519–540.
- Nagle GJ, Kurtz SM. Electron microscopy of the human rectal mucosa. A comparison of idiopathic ulcerative colitis with inflammation of known etiologies. Am J Dig Dis. 1967;12:541–567.
- O'Connor JJ. An electron microscopic study of inflammatory colonic disease. Dis Colon Rectum. 1972;15:265–277.
- Campbell BJ, Finnie IA, Hounsell EF, Rhodes JM. Direct demonstration of increased expression of Thomsen-Friedenreich (TF) antigen in colonic adenocarcinoma and ulcerative colitis mucin and its concealment in normal mucin. J Clin Invest. 1995;95:571–576.
- Mahida YR, Wu K, Jewell DP. Enhanced production of interleukin 1-beta by mononuclear cells isolated from mucosa with active ulcerative colitis of Crohn's disease. Gut. 1989;30:835–838.
- Gionchetti P, Campieri M, Belluzzi A, Tampieri M, Bertinelli E, et al. Interleukin 1 beta (IL-1 beta) release from fresh and cultured colonic mucosa in patients with ulcerative colitis (UC) Agents Actions Spec No: C50–52. 1992.
- Olson AD, Ayass M, Chensue S. Tumor necrosis factor and IL-1 beta expression in pediatric patients with inflammatory bowel disease. J Pediatr Gastroenterol Nutr. 1993;16:241–246.
- Fuss IJ, Neurath M, Boirivant M, Klein JS, de la Motte C, et al. Disparate CD4+ lamina propria (LP) lymphokine secretion profiles in inflammatory bowel disease. Crohn's disease LP cells manifest increased secretion of IFN-gamma, whereas ulcerative colitis LP cells manifest increased secretion of IL-5. J Immunol. 1996;157:1261–1270.
- Reimund JM, Wittersheim C, Dumont S, Muller CD, Baumann R, et al. Mucosal inflammatory cytokine production by intestinal biopsies in patients with ulcerative colitis and Crohn's disease. J Clin Immunol. 1996;16:144–150.
- Vainer B, Nielsen OH, Hendel J, Horn T, Kirman I. Colonic expression and synthesis of interleukin 13 and interleukin 15 in inflammatory bowel disease. Cytokine. 2000;12:1531–1536.
- Fuss IJ, Heller F, Boirivant M, Leon F, Yoshida M, et al. Nonclassical CD1d-restricted NK T cells that produce IL-13 characterize an atypical Th2 response in ulcerative colitis. J Clin Invest. 2004;113:1490–1497.
- Kadivar K, Ruchelli ED, Markowitz JE, Defelice ML, Strogatz ML, et al. Intestinal interleukin-13 in pediatric inflammatory bowel disease patients. Inflamm Bowel Dis. 2004;10:593–598.
- Heller F, Florian P, Bojarski C, Richter J, Christ M, et al. Interleukin-13 is the key effector Th2 cytokine in ulcerative colitis that affects epithelial tight junctions, apoptosis, and cell restitution. Gastroenterology. 2005;129:550–564.
- Heller F, Fuss IJ, Nieuwenhuis EE, Blumberg RS, Strober W. Oxazolone colitis, a Th2 colitis model resembling ulcerative colitis, is mediated by IL-13-producing NK-T cells. Immunity. 2002;17:629–638.
- McDermott JR, Humphreys NE, Forman SP, Donaldson DD, Grencis RK. Intraepithelial NK cell-derived IL-13 induces intestinal pathology associated with nematode infection. J Immunol. 2005;175:3207–3213.
- Jenkins RT, Ramage JK, Jones DB, Collins SM, Goodacre RL, et al. Small bowel and colonic permeability to 51Cr-EDTA in patients with active inflammatory bowel disease. Clin Invest Med. 1988;11:151–155.
- Wang F, Graham WV, Wang Y, Witkowski ED, Schwarz BT, et al. Interferon-gamma and tumor necrosis factor-alpha synergize to induce intestinal epithelial barrier dysfunction by up-regulating myosin light chain kinase expression. Am J Pathol. 2005;166:409–419.
- Majors AK, Austin RC, de la Motte CA, Pyeritz RE, Hascall VC, et al. Endoplasmic reticulum stress induces hyaluronan deposition and leukocyte adhesion. J Biol Chem. 2003;278:47223–47231.
- Zhang K, Shen X, Wu J, Sakaki K, Saunders T, et al. Endoplasmic reticulum stress activates cleavage of CREBH to induce a systemic inflammatory response. Cell. 2006;124:587–599.
- Shkoda A, Ruiz P, Daniel H, Kim S, Rogler G, et al. Interleukin 10 blocked endoplasmic reticulum stress in intestinal epithelial cells: Impact on chronic inflammation. Gastroenterology. 2007;132:190–207.
- Pahl HL, Baeuerle PA. A novel signal transduction pathway from the endoplasmic reticulum to the nucleus is mediated by transcription factor NF-kappa B. EMBO J. 1995;14:2580–2588.
- Rogler G, Brand K, Vogl D, Page S, Hofmeister R, et al. Nuclear factor kappaB is activated in macrophages and epithelial cells of inflamed intestinal mucosa. Gastroenterology. 1998;115:357–369.
- Andresen L, Jorgensen VL, Perner A, Hansen A, Eugen-Olsen J, et al. Activation of nuclear factor kappaB in colonic mucosa from patients with collagenous and ulcerative colitis. Gut. 2005;54:503–509.
- Bodger K, Halfvarson J, Dodson A, Campbell F, Wilson S, et al. Abnormal colonic glycoprotein expression in unaffected monozygotic twins of inflammatory bowel disease patients. Gut. 2006;55:973–977.
- Shroyer NF, Wallis D, Venken KJ, Bellen HJ, Zoghbi HY. Gfi1 functions downstream of Math1 to control intestinal secretory cell subtype allocation and differentiation. Genes Dev. 2005;19:2412–2417.
- Longman RJ, Poulsom R, Corfield AP, Warren BF, Wright NA, et al. Alterations in the composition of the supramucosal defense barrier in relation to disease severity of ulcerative colitis. J Histochem Cytochem. 2006;54:1335–1348.
- Bertolotti A, Wang X, Novoa I, Jungreis R, Schlessinger K, et al. Increased sensitivity to dextran sodium sulfate colitis in IRE1beta-deficient mice. J Clin Invest. 2001;107:585–593.
- Dvorak AM, Dickersin GR. Crohn's disease: transmission electron microscopic studies. I. Barrier function. Possible changes related to alterations of cell coat, mucous coat, epithelial cells, and Paneth cells. Hum Pathol. 1980;11:561–571.
- Meusser B, Hirsch C, Jarosch E, Sommer T. ERAD: the long road to destruction. Nat Cell Biol. 2005;7:766–772.
- Michiels JJ, Berneman Z, Gadisseur A, van der Planken M, Schroyens W, et al. Classification and characterization of hereditary types 2A, 2B, 2C, 2D, 2E, 2M, 2N, and 2U (unclassifiable) von Willebrand disease. Clin Appl Thromb Hemost. 2006;12:397–420.
- Williams CN, Kocher K, Lander ES, Daly MJ, Rioux JD. Using a genome-wide scan and meta-analysis to identify a novel IBD locus and confirm previously identified IBD loci. Inflamm Bowel Dis. 2002;8:375–381.
- Swallow DM, Vinall LE, Gum JR, Kim YS, Yang HY, et al. Ulcerative colitis is not associated with differences in MUC2 mucin allele length. J Med Genet. 1999;36:859–860.
- Moehle C, Ackermann N, Langmann T, Aslanidis C, Kel A, et al. Aberrant intestinal expression and allelic variants of mucin genes associated with inflammatory bowel disease. J Mol Med. 2006;84:1055–1066.
- Dixon AL, Liang L, Moffatt MF, Chen W, Heath S, et al. A genome-wide association study of global gene expression. Nat Genet. 2007;39:1202–1207.
- Xue X, Piao JH, Nakajima A, Sakon-Komazawa S, Kojima Y, et al. Tumor necrosis factor alpha (TNFalpha) induces the unfolded protein response (UPR) in a reactive oxygen species (ROS)-dependent fashion, and the UPR counteracts ROS accumulation by TNFalpha. J Biol Chem. 2005;280:33917–33925.
- Hogan SP, Seidu L, Blanchard C, Groschwitz K, Mishra A, et al. Resistin-like molecule beta regulates innate colonic function: barrier integrity and inflammation susceptibility. J Allergy Clin Immunol. 2006;118:257–268.
- McVay LD, Keilbaugh SA, Wong TM, Kierstein S, Shin ME, et al. Absence of bacterially induced RELMbeta reduces injury in the dextran sodium sulfate model of colitis. J Clin Invest. 2006;116:2914–2923.
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