Fatty acid ethyl ester synthase inhibition ameliorates ethanol-induced Ca2+-dependent mitochondrial dysfunction and acute pancreatitis

Wei Huang, David M. Booth, Matthew C. Cane, Michael Chvanov, Muhammad A. Javed, Victoria L. Elliott, Jane A. Armstrong, Hayley Dingsdale, Nicole Cash, Yan Li, William Greenhalf, Rajarshi Mukherjee, Bhupendra Kaphalia, Mohammed Jaffar, Ole H. Petersen, Alexei V. Tepikin, Robert Sutton, David N. Criddle

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Abstract

Objective Non-oxidative metabolism of ethanol (NOME) produces fatty acid ethyl esters (FAEEs) via carboxylester lipase (CEL) and other enzyme action implicated in mitochondrial injury and acute pancreatitis (AP). This study investigated the relative importance of oxidative and nonoxidative pathways in mitochondrial dysfunction, pancreatic damage and development of alcoholic AP, and whether deleterious effects of NOME are preventable. Design Intracellular calcium ([Ca2+]C), NAD(P)H, mitochondrial membrane potential and activation of apoptotic and necrotic cell death pathways were examined in isolated pancreatic acinar cells in response to ethanol and/or palmitoleic acid (POA) in the presence or absence of 4-methylpyrazole (4-MP) to inhibit oxidative metabolism. A novel in vivo model of alcoholic AP induced by intraperitoneal administration of ethanol and POA was developed to assess the effects of manipulating alcohol metabolism. Results Inhibition of OME with 4-MP converted predominantly transient [Ca2+]C rises induced by low ethanol/POA combination to sustained elevations, with concurrent mitochondrial depolarisation, fall of NAD(P)H and cellular necrosis in vitro. All effects were prevented by 3-benzyl-6-chloro-2-pyrone (3-BCP), a CEL inhibitor. 3-BCP also significantly inhibited rises of pancreatic FAEE in vivo and ameliorated acute pancreatic damage and inflammation induced by administration of ethanol and POA to mice. Conclusions A combination of low ethanol and fatty acid that did not exert deleterious effects per se became toxic when oxidative metabolism was inhibited. The in vitro and in vivo damage was markedly inhibited by blockade of CEL, indicating the potential for development of specific therapy for treatment of alcoholic AP via inhibition of FAEE generation.

Original languageEnglish (US)
Pages (from-to)1313-1324
Number of pages12
JournalGut
Volume63
Issue number8
DOIs
StatePublished - 2014

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Pancreatitis
Ethanol
Alcoholic Pancreatitis
Carboxylesterase
Fatty Acids
Esters
NAD
Acinar Cells
Mitochondrial Membrane Potential
Poisons
fatty acyl ethyl ester synthase
Cell Death
Necrosis
Alcohols
Inflammation
Calcium
palmitoleic acid
Wounds and Injuries
Enzymes

ASJC Scopus subject areas

  • Gastroenterology

Cite this

Huang, W., Booth, D. M., Cane, M. C., Chvanov, M., Javed, M. A., Elliott, V. L., ... Criddle, D. N. (2014). Fatty acid ethyl ester synthase inhibition ameliorates ethanol-induced Ca2+-dependent mitochondrial dysfunction and acute pancreatitis. Gut, 63(8), 1313-1324. https://doi.org/10.1136/gutjnl-2012-304058

Fatty acid ethyl ester synthase inhibition ameliorates ethanol-induced Ca2+-dependent mitochondrial dysfunction and acute pancreatitis. / Huang, Wei; Booth, David M.; Cane, Matthew C.; Chvanov, Michael; Javed, Muhammad A.; Elliott, Victoria L.; Armstrong, Jane A.; Dingsdale, Hayley; Cash, Nicole; Li, Yan; Greenhalf, William; Mukherjee, Rajarshi; Kaphalia, Bhupendra; Jaffar, Mohammed; Petersen, Ole H.; Tepikin, Alexei V.; Sutton, Robert; Criddle, David N.

In: Gut, Vol. 63, No. 8, 2014, p. 1313-1324.

Research output: Contribution to journalArticle

Huang, W, Booth, DM, Cane, MC, Chvanov, M, Javed, MA, Elliott, VL, Armstrong, JA, Dingsdale, H, Cash, N, Li, Y, Greenhalf, W, Mukherjee, R, Kaphalia, B, Jaffar, M, Petersen, OH, Tepikin, AV, Sutton, R & Criddle, DN 2014, 'Fatty acid ethyl ester synthase inhibition ameliorates ethanol-induced Ca2+-dependent mitochondrial dysfunction and acute pancreatitis', Gut, vol. 63, no. 8, pp. 1313-1324. https://doi.org/10.1136/gutjnl-2012-304058
Huang, Wei ; Booth, David M. ; Cane, Matthew C. ; Chvanov, Michael ; Javed, Muhammad A. ; Elliott, Victoria L. ; Armstrong, Jane A. ; Dingsdale, Hayley ; Cash, Nicole ; Li, Yan ; Greenhalf, William ; Mukherjee, Rajarshi ; Kaphalia, Bhupendra ; Jaffar, Mohammed ; Petersen, Ole H. ; Tepikin, Alexei V. ; Sutton, Robert ; Criddle, David N. / Fatty acid ethyl ester synthase inhibition ameliorates ethanol-induced Ca2+-dependent mitochondrial dysfunction and acute pancreatitis. In: Gut. 2014 ; Vol. 63, No. 8. pp. 1313-1324.
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abstract = "Objective Non-oxidative metabolism of ethanol (NOME) produces fatty acid ethyl esters (FAEEs) via carboxylester lipase (CEL) and other enzyme action implicated in mitochondrial injury and acute pancreatitis (AP). This study investigated the relative importance of oxidative and nonoxidative pathways in mitochondrial dysfunction, pancreatic damage and development of alcoholic AP, and whether deleterious effects of NOME are preventable. Design Intracellular calcium ([Ca2+]C), NAD(P)H, mitochondrial membrane potential and activation of apoptotic and necrotic cell death pathways were examined in isolated pancreatic acinar cells in response to ethanol and/or palmitoleic acid (POA) in the presence or absence of 4-methylpyrazole (4-MP) to inhibit oxidative metabolism. A novel in vivo model of alcoholic AP induced by intraperitoneal administration of ethanol and POA was developed to assess the effects of manipulating alcohol metabolism. Results Inhibition of OME with 4-MP converted predominantly transient [Ca2+]C rises induced by low ethanol/POA combination to sustained elevations, with concurrent mitochondrial depolarisation, fall of NAD(P)H and cellular necrosis in vitro. All effects were prevented by 3-benzyl-6-chloro-2-pyrone (3-BCP), a CEL inhibitor. 3-BCP also significantly inhibited rises of pancreatic FAEE in vivo and ameliorated acute pancreatic damage and inflammation induced by administration of ethanol and POA to mice. Conclusions A combination of low ethanol and fatty acid that did not exert deleterious effects per se became toxic when oxidative metabolism was inhibited. The in vitro and in vivo damage was markedly inhibited by blockade of CEL, indicating the potential for development of specific therapy for treatment of alcoholic AP via inhibition of FAEE generation.",
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T1 - Fatty acid ethyl ester synthase inhibition ameliorates ethanol-induced Ca2+-dependent mitochondrial dysfunction and acute pancreatitis

AU - Huang, Wei

AU - Booth, David M.

AU - Cane, Matthew C.

AU - Chvanov, Michael

AU - Javed, Muhammad A.

AU - Elliott, Victoria L.

AU - Armstrong, Jane A.

AU - Dingsdale, Hayley

AU - Cash, Nicole

AU - Li, Yan

AU - Greenhalf, William

AU - Mukherjee, Rajarshi

AU - Kaphalia, Bhupendra

AU - Jaffar, Mohammed

AU - Petersen, Ole H.

AU - Tepikin, Alexei V.

AU - Sutton, Robert

AU - Criddle, David N.

PY - 2014

Y1 - 2014

N2 - Objective Non-oxidative metabolism of ethanol (NOME) produces fatty acid ethyl esters (FAEEs) via carboxylester lipase (CEL) and other enzyme action implicated in mitochondrial injury and acute pancreatitis (AP). This study investigated the relative importance of oxidative and nonoxidative pathways in mitochondrial dysfunction, pancreatic damage and development of alcoholic AP, and whether deleterious effects of NOME are preventable. Design Intracellular calcium ([Ca2+]C), NAD(P)H, mitochondrial membrane potential and activation of apoptotic and necrotic cell death pathways were examined in isolated pancreatic acinar cells in response to ethanol and/or palmitoleic acid (POA) in the presence or absence of 4-methylpyrazole (4-MP) to inhibit oxidative metabolism. A novel in vivo model of alcoholic AP induced by intraperitoneal administration of ethanol and POA was developed to assess the effects of manipulating alcohol metabolism. Results Inhibition of OME with 4-MP converted predominantly transient [Ca2+]C rises induced by low ethanol/POA combination to sustained elevations, with concurrent mitochondrial depolarisation, fall of NAD(P)H and cellular necrosis in vitro. All effects were prevented by 3-benzyl-6-chloro-2-pyrone (3-BCP), a CEL inhibitor. 3-BCP also significantly inhibited rises of pancreatic FAEE in vivo and ameliorated acute pancreatic damage and inflammation induced by administration of ethanol and POA to mice. Conclusions A combination of low ethanol and fatty acid that did not exert deleterious effects per se became toxic when oxidative metabolism was inhibited. The in vitro and in vivo damage was markedly inhibited by blockade of CEL, indicating the potential for development of specific therapy for treatment of alcoholic AP via inhibition of FAEE generation.

AB - Objective Non-oxidative metabolism of ethanol (NOME) produces fatty acid ethyl esters (FAEEs) via carboxylester lipase (CEL) and other enzyme action implicated in mitochondrial injury and acute pancreatitis (AP). This study investigated the relative importance of oxidative and nonoxidative pathways in mitochondrial dysfunction, pancreatic damage and development of alcoholic AP, and whether deleterious effects of NOME are preventable. Design Intracellular calcium ([Ca2+]C), NAD(P)H, mitochondrial membrane potential and activation of apoptotic and necrotic cell death pathways were examined in isolated pancreatic acinar cells in response to ethanol and/or palmitoleic acid (POA) in the presence or absence of 4-methylpyrazole (4-MP) to inhibit oxidative metabolism. A novel in vivo model of alcoholic AP induced by intraperitoneal administration of ethanol and POA was developed to assess the effects of manipulating alcohol metabolism. Results Inhibition of OME with 4-MP converted predominantly transient [Ca2+]C rises induced by low ethanol/POA combination to sustained elevations, with concurrent mitochondrial depolarisation, fall of NAD(P)H and cellular necrosis in vitro. All effects were prevented by 3-benzyl-6-chloro-2-pyrone (3-BCP), a CEL inhibitor. 3-BCP also significantly inhibited rises of pancreatic FAEE in vivo and ameliorated acute pancreatic damage and inflammation induced by administration of ethanol and POA to mice. Conclusions A combination of low ethanol and fatty acid that did not exert deleterious effects per se became toxic when oxidative metabolism was inhibited. The in vitro and in vivo damage was markedly inhibited by blockade of CEL, indicating the potential for development of specific therapy for treatment of alcoholic AP via inhibition of FAEE generation.

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