Colorado PROFILES, The Colorado Clinical and Translational Sciences Institute (CCTSI)
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Colin Tucker Shearn

TitleAsst Professor-Research
InstitutionUniversity of Colorado Denver - Anschutz Medical Campus
DepartmentSOM-PEDS

    Collapse Biography 
    Collapse education and training
    Iowa State University, Ames, IowaPh.D.08/2004Immunobiology

    Collapse Research 
    Collapse research activities and funding
    F32AA018613     (SHEARN, COLIN)May 1, 2010 - Apr 30, 2013
    NIH
    Regulation of PTEN in chronic alcohol mediated liver disease
    Role: Principal Investigator

    Collapse Bibliographic 
    Collapse selected publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    1. Shearn CT, Anderson AL, Devereaux MW, El Kasmi KC, Orlicky DJ, Sokol RJ. Expression of circadian regulatory genes is dysregulated by increased cytokine production in mice subjected to concomitant intestinal injury and parenteral nutrition. PLoS One. 2023; 18(8):e0290385. PMID: 37647292.
      View in: PubMed
    2. Davidson EA, Chen Y, Singh S, Orlicky DJ, Thompson B, Wang Y, Charkoftaki G, Furnary TA, Cardone RL, Kibbey RG, Shearn CT, Nebert DW, Thompson DC, Vasiliou V. Endocrine pancreas-specific Gclc gene deletion causes a severe diabetes phenotype. bioRxiv. 2023 Jun 26. PMID: 37398356.
      View in: PubMed
    3. Shearn CT, Anderson AL, Miller CG, Noyd RC, Devereaux MW, Balasubramaniyan N, Orlicky DJ, Schmidt EE, Sokol RJ. Thioredoxin reductase 1 regulates hepatic inflammation and macrophage activation during acute cholestatic liver injury. Hepatol Commun. 2023 01 01; 7(1):e0020. PMID: 36633484.
      View in: PubMed
    4. Shearn CT, Anderson AL, Devereux MW, Orlicky DJ, Michel C, Petersen DR, Miller CG, Harpavat S, Schmidt EE, Sokol RJ. The autophagic protein p62 is a target of reactive aldehydes in human and murine cholestatic liver disease. PLoS One. 2022; 17(11):e0276879. PMID: 36378690.
      View in: PubMed
    5. El Kasmi KC, Ghosh S, Anderson AL, Devereaux MW, Balasubramaniyan N, D'Alessandro A, Orlicky DJ, Suchy FJ, Shearn CT, Sokol RJ. Pharmacologic activation of hepatic farnesoid X receptor prevents parenteral nutrition-associated cholestasis in mice. Hepatology. 2022 02; 75(2):252-265. PMID: 34387888.
      View in: PubMed
    6. El Kasmi KC, Anderson AL, Devereaux MW, Balasubramaniyan N, Suchy FJ, Orlicky DJ, Shearn CT, Sokol RJ. Interrupting tumor necrosis factor-alpha signaling prevents parenteral nutrition-associated cholestasis in mice. JPEN J Parenter Enteral Nutr. 2022 07; 46(5):1096-1106. PMID: 34664730.
      View in: PubMed
    7. Charkoftaki G, Golla JP, Santos-Neto A, Orlicky DJ, Garcia-Milian R, Chen Y, Rattray NJW, Cai Y, Wang Y, Shearn CT, Mironova V, Wang Y, Johnson CH, Thompson DC, Vasiliou V. Identification of Dose-Dependent DNA Damage and Repair Responses From Subchronic Exposure to 1,4-Dioxane in Mice Using a Systems Analysis Approach. Toxicol Sci. 2021 09 28; 183(2):338-351. PMID: 33693819.
      View in: PubMed
    8. Ghosh S, Devereaux MW, Anderson AL, Gehrke S, Reisz JA, D'Alessandro A, Orlicky DJ, Lovell M, El Kasmi KC, Shearn CT, Sokol RJ. NF-?B Regulation of LRH-1 and ABCG5/8 Potentiates Phytosterol Role in the Pathogenesis of Parenteral Nutrition-Associated Cholestasis. Hepatology. 2021 12; 74(6):3284-3300. PMID: 34310734.
      View in: PubMed
    9. Miller CG, Kundert JA, Prigge JR, Amato JA, Perez AE, Coppo L, Rizzo GN, Kavanaugh MP, Orlicky DJ, Shearn CT, Schmidt EE. Supplemental Ascorbate Diminishes DNA Damage Yet Depletes Glutathione and Increases Acute Liver Failure in a Mouse Model of Hepatic Antioxidant System Disruption. Antioxidants (Basel). 2021 Feb 27; 10(3). PMID: 33673577.
      View in: PubMed
    10. Alnaas AA, Watson-Siriboe A, Tran S, Negussie M, Henderson JA, Osterberg JR, Chon NL, Harrott BM, Oviedo J, Lyakhova T, Michel C, Reisdorph N, Reisdorph R, Shearn CT, Lin H, Knight JD. Multivalent lipid targeting by the calcium-independent C2A domain of synaptotagmin-like protein 4/granuphilin. J Biol Chem. 2021 Jan-Jun; 296:100159. PMID: 33277360.
      View in: PubMed
    11. Gao RY, Shearn CT, Orlicky DJ, Battista KD, Alexeev EE, Cartwright IM, Lanis JM, Kostelecky RE, Ju C, Colgan SP, Fennimore BP. Bile acids modulate colonic MAdCAM-1 expression in a murine model of combined cholestasis and colitis. Mucosal Immunol. 2021 03; 14(2):479-490. PMID: 33004979.
      View in: PubMed
    12. Pan G, Deshpande M, Pang H, Stemmer PM, Carruthers NJ, Shearn CT, Backos DS, Palaniyandi SS. 4-Hydroxy-2-nonenal attenuates 8-oxoguanine DNA glycosylase 1 activity. J Cell Biochem. 2020 Dec; 121(12):4887-4897. PMID: 32628320.
      View in: PubMed
    13. Shearn CT, Fennimore B, Orlicky DJ, Gao YR, Saba LM, Battista KD, Aivazidis S, Assiri M, Harris PS, Michel C, Merrill GF, Schmidt EE, Colgan SP, Petersen DR. Cholestatic liver disease results increased production of reactive aldehydes and an atypical periportal hepatic antioxidant response. Free Radic Biol Med. 2019 11 01; 143:101-114. PMID: 31377417.
      View in: PubMed
    14. McLoughlin MR, Orlicky DJ, Prigge JR, Krishna P, Talago EA, Cavigli IR, Eriksson S, Miller CG, Kundert JA, Sayin VI, Sabol RA, Heinemann J, Brandenberger LO, Iverson SV, Bothner B, Papagiannakopoulos T, Shearn CT, Arn?r ESJ, Schmidt EE. TrxR1, Gsr, and oxidative stress determine hepatocellular carcinoma malignancy. Proc Natl Acad Sci U S A. 2019 06 04; 116(23):11408-11417. PMID: 31097586.
      View in: PubMed
    15. Ali HR, Assiri MA, Harris PS, Michel CR, Yun Y, Marentette JO, Huynh FK, Orlicky DJ, Shearn CT, Saba LM, Reisdorph R, Reisdorph N, Hirschey MD, Fritz KS. Quantifying Competition among Mitochondrial Protein Acylation Events Induced by Ethanol Metabolism. J Proteome Res. 2019 04 05; 18(4):1513-1531. PMID: 30644754.
      View in: PubMed
    16. Ali H, Assiri MA, Shearn CT, Fritz KS. Lipid peroxidation derived reactive aldehydes in alcoholic liver disease. Curr Opin Toxicol. 2019 Feb; 13:110-117. PMID: 31263795.
      View in: PubMed
    17. Shearn CT, Pulliam CF, Pedersen K, Meredith K, Mercer KE, Saba LM, Orlicky DJ, Ronis MJ, Petersen DR. Knockout of the Gsta4 Gene in Male Mice Leads to an Altered Pattern of Hepatic Protein Carbonylation and Enhanced Inflammation Following Chronic Consumption of an Ethanol Diet. Alcohol Clin Exp Res. 2018 07; 42(7):1192-1205. PMID: 29708596.
      View in: PubMed
    18. Petersen DR, Orlicky DJ, Roede JR, Shearn CT. Aberrant expression of redox regulatory proteins in patients with concomitant primary Sclerosing cholangitis/inflammatory bowel disease. Exp Mol Pathol. 2018 08; 105(1):32-36. PMID: 29852184.
      View in: PubMed
    19. Petersen DR, Saba LM, Sayin VI, Papagiannakopoulos T, Schmidt EE, Merrill GF, Orlicky DJ, Shearn CT. Elevated Nrf-2 responses are insufficient to mitigate protein carbonylation in hepatospecific PTEN deletion mice. PLoS One. 2018; 13(5):e0198139. PMID: 29799837.
      View in: PubMed
    20. Kharbanda KK, Ronis MJJ, Shearn CT, Petersen DR, Zakhari S, Warner DR, Feldstein AE, McClain CJ, Kirpich IA. Role of Nutrition in Alcoholic Liver Disease: Summary of the Symposium at the ESBRA 2017 Congress. Biomolecules. 2018 03 26; 8(2). PMID: 29587455.
      View in: PubMed
    21. Maclean KN, Jiang H, Aivazidis S, Kim E, Shearn CT, Harris PS, Petersen DR, Allen RH, Stabler SP, Roede JR. Taurine treatment prevents derangement of the hepatic ?-glutamyl cycle and methylglyoxal metabolism in a mouse model of classical homocystinuria: regulatory crosstalk between thiol and sulfinic acid metabolism. FASEB J. 2018 03; 32(3):1265-1280. PMID: 29101223.
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    22. Shearn CT, Orlicky DJ, Petersen DR. Dysregulation of antioxidant responses in patients diagnosed with concomitant Primary Sclerosing Cholangitis/Inflammatory Bowel Disease. Exp Mol Pathol. 2018 02; 104(1):1-8. PMID: 29180269.
      View in: PubMed
    23. Shearn CT, Saba LM, Roede JR, Orlicky DJ, Shearn AH, Petersen DR. Differential carbonylation of proteins in end-stage human fatty and nonfatty NASH. Free Radic Biol Med. 2017 12; 113:280-290. PMID: 28988798.
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    24. Assiri MA, Roy SR, Harris PS, Ali H, Liang Y, Shearn CT, Orlicky DJ, Roede JR, Hirschey MD, Backos DS, Fritz KS. Chronic Ethanol Metabolism Inhibits Hepatic Mitochondrial Superoxide Dismutase via Lysine Acetylation. Alcohol Clin Exp Res. 2017 Oct; 41(10):1705-1714. PMID: 28804911.
      View in: PubMed
    25. Prigge JR, Coppo L, Martin SS, Ogata F, Miller CG, Bruschwein MD, Orlicky DJ, Shearn CT, Kundert JA, Lytchier J, Herr AE, Mattsson ?, Taylor MP, Gustafsson TN, Arn?r ESJ, Holmgren A, Schmidt EE. Hepatocyte Hyperproliferation upon Liver-Specific Co-disruption of Thioredoxin-1, Thioredoxin Reductase-1, and Glutathione Reductase. Cell Rep. 2017 06 27; 19(13):2771-2781. PMID: 28658624.
      View in: PubMed
    26. Ronis M, Mercer K, Engi B, Pulliam C, Zimniak P, Hennings L, Shearn C, Badger T, Petersen D. Global Deletion of Glutathione S-Transferase A4 Exacerbates Developmental Nonalcoholic Steatohepatitis. Am J Pathol. 2017 Feb; 187(2):418-430. PMID: 27998724.
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    27. Sundaram SS, Halbower A, Pan Z, Robbins K, Capocelli KE, Klawitter J, Shearn CT, Sokol RJ. Nocturnal hypoxia-induced oxidative stress promotes progression of pediatric non-alcoholic fatty liver disease. J Hepatol. 2016 09; 65(3):560-9. PMID: 27501738.
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    28. Osna NA, Carter WG, Ganesan M, Kirpich IA, McClain CJ, Petersen DR, Shearn CT, Tomasi ML, Kharbanda KK. Aberrant post-translational protein modifications in the pathogenesis of alcohol-induced liver injury. World J Gastroenterol. 2016 Jul 21; 22(27):6192-200. PMID: 27468209.
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    29. Shearn CT, Orlicky DJ, McCullough RL, Jiang H, Maclean KN, Mercer KE, Stiles BL, Saba LM, Ronis MJ, Petersen DR. Liver-Specific Deletion of Phosphatase and Tensin Homolog Deleted on Chromosome 10 Significantly Ameliorates Chronic EtOH-Induced Increases in Hepatocellular Damage. PLoS One. 2016; 11(4):e0154152. PMID: 27124661.
      View in: PubMed
    30. Shearn CT, Fritz KS, Shearn AH, Saba LM, Mercer KE, Engi B, Galligan JJ, Zimniak P, Orlicky DJ, Ronis MJ, Petersen DR. Deletion of GSTA4-4 results in increased mitochondrial post-translational modification of proteins by reactive aldehydes following chronic ethanol consumption in mice. Redox Biol. 2016 Apr; 7:68-77. PMID: 26654979.
      View in: PubMed
    31. Shearn CT, Orlicky DJ, Saba LM, Shearn AH, Petersen DR. Increased hepatocellular protein carbonylation in human end-stage alcoholic cirrhosis. Free Radic Biol Med. 2015 Dec; 89:1144-53. PMID: 26518673.
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    32. Harris PS, Roy SR, Coughlan C, Orlicky DJ, Liang Y, Shearn CT, Roede JR, Fritz KS. Chronic ethanol consumption induces mitochondrial protein acetylation and oxidative stress in the kidney. Redox Biol. 2015 Dec; 6:33-40. PMID: 26177469.
      View in: PubMed
    33. Shearn CT, Petersen DR. Understanding the tumor suppressor PTEN in chronic alcoholism and hepatocellular carcinoma. Adv Exp Med Biol. 2015; 815:173-84. PMID: 25427907.
      View in: PubMed
    34. Ronis MJ, Mercer KE, Gannon B, Engi B, Zimniak P, Shearn CT, Orlicky DJ, Albano E, Badger TM, Petersen DR. Increased 4-hydroxynonenal protein adducts in male GSTA4-4/PPAR-a double knockout mice enhance injury during early stages of alcoholic liver disease. Am J Physiol Gastrointest Liver Physiol. 2015 Mar 01; 308(5):G403-15. PMID: 25501545.
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    35. Galligan JJ, Fritz KS, Backos DS, Shearn CT, Smathers RL, Jiang H, MacLean KN, Reigan PR, Petersen DR. Oxidative stress-mediated aldehyde adduction of GRP78 in a mouse model of alcoholic liver disease: functional independence of ATPase activity and chaperone function. Free Radic Biol Med. 2014 Aug; 73:411-20. PMID: 24924946.
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    36. Shearn CT, Mercer KE, Orlicky DJ, Hennings L, Smathers-McCullough RL, Stiles BL, Ronis MJ, Petersen DR. Short term feeding of a high fat diet exerts an additive effect on hepatocellular damage and steatosis in liver-specific PTEN knockout mice. PLoS One. 2014; 9(5):e96553. PMID: 24818992.
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    37. Shearn CT, Backos DS, Orlicky DJ, Smathers-McCullough RL, Petersen DR. Identification of 5' AMP-activated kinase as a target of reactive aldehydes during chronic ingestion of high concentrations of ethanol. J Biol Chem. 2014 May 30; 289(22):15449-62. PMID: 24722988.
      View in: PubMed
    38. Shearn CT, Smathers RL, Backos DS, Reigan P, Orlicky DJ, Petersen DR. Increased carbonylation of the lipid phosphatase PTEN contributes to Akt2 activation in a murine model of early alcohol-induced steatosis. Free Radic Biol Med. 2013 Dec; 65:680-692. PMID: 23872024.
      View in: PubMed
    39. Li Y, He L, Zeng N, Sahu D, Cadenas E, Shearn C, Li W, Stiles BL. Phosphatase and tensin homolog deleted on chromosome 10 (PTEN) signaling regulates mitochondrial biogenesis and respiration via estrogen-related receptor a (ERRa). J Biol Chem. 2013 Aug 30; 288(35):25007-25024. PMID: 23836899.
      View in: PubMed
    40. Shearn CT, Smathers RL, Jiang H, Orlicky DJ, Maclean KN, Petersen DR. Increased dietary fat contributes to dysregulation of the LKB1/AMPK pathway and increased damage in a mouse model of early-stage ethanol-mediated steatosis. J Nutr Biochem. 2013 Aug; 24(8):1436-45. PMID: 23465594.
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    41. Smathers RL, Galligan JJ, Shearn CT, Fritz KS, Mercer K, Ronis M, Orlicky DJ, Davidson NO, Petersen DR. Susceptibility of L-FABP-/- mice to oxidative stress in early-stage alcoholic liver. J Lipid Res. 2013 May; 54(5):1335-45. PMID: 23359610.
      View in: PubMed
    42. Galligan JJ, Smathers RL, Shearn CT, Fritz KS, Backos DS, Jiang H, Franklin CC, Orlicky DJ, Maclean KN, Petersen DR. Oxidative Stress and the ER Stress Response in a Murine Model for Early-Stage Alcoholic Liver Disease. J Toxicol. 2012; 2012:207594. PMID: 22829816.
      View in: PubMed
    43. Smathers RL, Fritz KS, Galligan JJ, Shearn CT, Reigan P, Marks MJ, Petersen DR. Characterization of 4-HNE modified L-FABP reveals alterations in structural and functional dynamics. PLoS One. 2012; 7(6):e38459. PMID: 22701647.
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    44. Shearn CT, Reigan P, Petersen DR. Inhibition of hydrogen peroxide signaling by 4-hydroxynonenal due to differential regulation of Akt1 and Akt2 contributes to decreases in cell survival and proliferation in hepatocellular carcinoma cells. Free Radic Biol Med. 2012 Jul 01; 53(1):1-11. PMID: 22580126.
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    45. Shearn CT, Fritz KS, Thompson JA. Protein damage from electrophiles and oxidants in lungs of mice chronically exposed to the tumor promoter butylated hydroxytoluene. Chem Biol Interact. 2011 Jul 15; 192(3):278-86. PMID: 21536018.
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    46. Shearn CT, Fritz KS, Reigan P, Petersen DR. Modification of Akt2 by 4-hydroxynonenal inhibits insulin-dependent Akt signaling in HepG2 cells. Biochemistry. 2011 May 17; 50(19):3984-96. PMID: 21438592.
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    47. Fritz KS, Galligan JJ, Smathers RL, Roede JR, Shearn CT, Reigan P, Petersen DR. 4-Hydroxynonenal inhibits SIRT3 via thiol-specific modification. Chem Res Toxicol. 2011 May 16; 24(5):651-62. PMID: 21449565.
      View in: PubMed
    48. Shearn CT, Smathers RL, Stewart BJ, Fritz KS, Galligan JJ, Hail N, Petersen DR. Phosphatase and tensin homolog deleted on chromosome 10 (PTEN) inhibition by 4-hydroxynonenal leads to increased Akt activation in hepatocytes. Mol Pharmacol. 2011 Jun; 79(6):941-52. PMID: 21415306.
      View in: PubMed
    49. Galligan JJ, Fritz KS, Tipney H, Smathers RL, Roede JR, Shearn CT, Hunter LE, Petersen DR. Profiling impaired hepatic endoplasmic reticulum glycosylation as a consequence of ethanol ingestion. J Proteome Res. 2011 Apr 01; 10(4):1837-47. PMID: 21319786.
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    50. Hail N, Chen P, Kepa JJ, Bushman LR, Shearn C. Dihydroorotate dehydrogenase is required for N-(4-hydroxyphenyl)retinamide-induced reactive oxygen species production and apoptosis. Free Radic Biol Med. 2010 Jul 01; 49(1):109-16. PMID: 20399851.
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    51. Senchina DS, Flinn GN, McCann DA, Kohut ML, Shearn CT. Bloodroot (Sanguinaria canadensis L., Papaveraceae) Enhances Proliferation and Cytokine Production by Human Peripheral Blood Mononuclear Cells in an In Vitro Model. J Herbs Spices Med Plants. 2009 Jan 01; 15(1):45. PMID: 20111671.
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    52. Shearn CT, Fritz KS, Meier BW, Kirichenko OV, Thompson JA. Carbonyl reductase inactivation may contribute to mouse lung tumor promotion by electrophilic metabolites of butylated hydroxytoluene: protein alkylation in vivo and in vitro. Chem Res Toxicol. 2008 Aug; 21(8):1631-41. PMID: 18597497.
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    53. Shearn CT, Norris FA. Biochemical characterization of the type I inositol polyphosphate 4-phosphatase C2 domain. Biochem Biophys Res Commun. 2007 Apr 27; 356(1):255-9. PMID: 17349979.
      View in: PubMed
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