Abstract
Ammonia is diffused and transported across all plasma membranes. This entails that hyperammonemia leads to an increase in ammonia in all organs and tissues. It is known that the toxic ramifications of ammonia primarily touch the brain and cause neurological impairment. However, the deleterious effects of ammonia are not specific to the brain, as the direct effect of increased ammonia (change in pH, membrane potential, metabolism) can occur in any type of cell. Therefore, in the setting of chronic liver disease where multi-organ dysfunction is common, the role of ammonia, only as neurotoxin, is challenged. This review provides insights and evidence that increased ammonia can disturb many organ and cell types and hence lead to dysfunction.


Similar content being viewed by others
Explore related subjects
Discover the latest articles and news from researchers in related subjects, suggested using machine learning.References
Abdo AA (2006) An evidence-based update on hepatic encephalopathy. Saudi J Gastroenterol 12:8–15
Agusti A, Cauli O, Rodrigo R, Llansola M, Hernández-Rabaza V, Felipo V (2011) p38 MAP kinase is a therapeutic target for hepatic encephalopathy in rats with portacaval shunts. Gut 60:1572–1579
Aldridge DR, Tranah EJ, Shawcross DL (2015) Pathogenesis of hepatic encephalopathy: role of ammonia and systemic inflammation. J Clin Exp Hepatol 5:S7–S20
Alger BE, Nicoll RA (1983) Ammonia does not selectively block IPSPs in rat hippocampal pyramidal cells. J Neurophysiol 49:1381–1391
Ali R, Mittal G, Sultana S, Bhatnagar A (2012) Ameliorative potential of alpha-ketoglutaric acid (AKG) on acute lung injuries induced by ammonia inhalation in rats. Exp Lung Res 38:435–444
Allert N, Köller H, Siebler M (1998) Ammonia-induced depolarization of cultured rat cortical astrocytes. Brain Res 782:261–270
Bachmann C, Braissant O, Villard A-M, Boulat O, Henry H (2004) Ammonia toxicity to the brain and creatine. Mol Genet Metab 81(Suppl 1):S52–S57
Bak LK, Schousboe A, Waagepetersen HS (2006) The glutamate/GABA-glutamine cycle: aspects of transport, neurotransmitter homeostasis and ammonia transfer. J Neurochem 98:641–653
Bakouh N, Benjelloun F, Cherif-Zahar B, Planelles G (2006) The challenge of understanding ammonium homeostasis and the role of the Rh glycoproteins. Transfus Clin Biol 13:139–146
Balasubramaniyan V, Wright G, Sharma V, NA D, Sharifi Y, Habtesion A, Mookerjee RP, Jalan R (2012) Ammonia reduction with ornithine phenylacetate restores brain eNOS activity via the DDAH-ADMA pathway in bile duct-ligated cirrhotic rats. Am J Physiol Gastrointest Liver Physiol 302:G145–G152
Benjamin AM, Okamoto K, Quastel JH (1978) Effects of ammonium ions on spontaneous action potentials and on contents of sodium, potassium, ammonium and chloride ions in brain in vitro. J Neurochem 30:131–143
Bento LMA, Carvalheira JBC, Menegon LF, Saad MJA, Gontijo JAR (2005) Effects of NH4Cl intake on renal growth in rats: role of MAPK signalling pathway. Nephrol Dial Transplant 20:2654–2660
Bessman AN, Evans JM (1955) The blood ammonia in congestive heart failure. Am Heart J 50:715–719
Bode JG, Peters-Regehr T, Gressner AM, Häussinger D (1998) De novo expression of glutamine synthetase during transformation of hepatic stellate cells into myofibroblast-like cells. Biochem J 335(Pt 3):697–700
Bosoi CR, Rose CF (2009) Identifying the direct effects of ammonia on the brain. Metab Brain Dis 24:95–102
Bosoi CR, Yang X, Huynh J, Parent-Robitaille C, Jiang W, Tremblay M, Rose CF (2012) Systemic oxidative stress is implicated in the pathogenesis of brain edema in rats with chronic liver failure. Free Radic Biol Med 52:1228–1235
Bosoi CR, Zwingmann C, Marin H, Parent-Robitaille C, Huynh J, Tremblay M, Rose CF (2014) Increased brain lactate is central to the development of brain edema in rats with chronic liver disease. J Hepatol 60:554–560
Bowie A, O’Neill LA (2000) Oxidative stress and nuclear factor-kappaB activation: a reassessment of the evidence in the light of recent discoveries. Biochem Pharmacol 59:13–23
Braissant O (2012) Creatine and guanidinoacetate transport at blood-brain and blood-cerebrospinal fluid barriers. J Inherit Metab Dis 35:655–664
Braissant O, Honegger P, Loup M, Iwase K, Takiguchi M, Bachmann C (1999) Hyperammonemia: regulation of argininosuccinate synthetase and argininosuccinate lyase genes in aggregating cell cultures of fetal rat brain. Neurosci Lett 266:89–92
Braissant O, McLin VA, Cudalbu C (2013) Ammonia toxicity to the brain. J Inherit Metab Dis 36:595–612
Bromberg PA, Robin ED, Forkner CEJ (1960) The existence of ammonia in blood in vivo with observations on the significance of the NH4 plus minus NH3 system. J Clin Invest 39:332–341
Brookes N, Turner RJ (1993) Extracellular potassium regulates the glutamine content of astrocytes: mediation by intracellular pH. Neurosci Lett 160:73–76
Brück J, Görg B, Bidmon H-J, Zemtsova I, Qvartskhava N, Keitel V, Kircheis G, Häussinger D (2011) Locomotor impairment and cerebrocortical oxidative stress in portal vein ligated rats in vivo. J Hepatol 54:251–257
Brusilow SW, Koehler RC, Traystman RJ, Cooper AJL (2010) Astrocyte glutamine synthetase: importance in hyperammonemic syndromes and potential target for therapy. NeuroRx 7:452–470
Busa WB, Nuccitelli R (1984) Metabolic regulation via intracellular pH. Am J Phys 246:R409–R438
Butterworth RF (2002) Pathophysiology of hepatic encephalopathy: a new look at ammonia. Metab Brain Dis 17:221–227
Butterworth RF (2008) Pathophysiology of hepatic encephalopathy: the concept of synergism. Hepatol Res 38:S116–S121
Butterworth RF (2011) Neuroinflammation in acute liver failure: mechanisms and novel therapeutic targets. Neurochem Int 59:830–836
Butterworth RF, Norenberg MD, Felipo V, Ferenci P, Albrecht J, Blei AT (2009) Experimental models of hepatic encephalopathy: ISHEN guidelines. Liver Int 29:783–788
Cagnon L, Braissant O (2007) Hyperammonemia-induced toxicity for the developing central nervous system. Brain Res Rev 56:183–197
Cagnon L, Braissant O (2009) CNTF protects oligodendrocytes from ammonia toxicity: intracellular signaling pathways involved. Neurobiol Dis 33:133–142
Calvert LD, Steiner MC, Morgan MD, Singh SJ (2010) Plasma ammonia response to incremental cycling and walking tests in COPD. Respir Med 104:675–681
Cauli O, Rodrigo R, Piedrafita B, Boix J, Felipo V (2007) Inflammation and hepatic encephalopathy: ibuprofen restores learning ability in rats with portacaval shunts. Hepatology 46:514–519
Cauli O, Llansola M, Agustí A, Rodrigo R, Hernández-Rabaza V, Rodrigues TB, López-Larrubia P, Cerdán S, Felipo V (2014) Cerebral oedema is not responsible for motor or cognitive deficits in rats with hepatic encephalopathy. Liver Int 34:379–387
Chance WT, Cao L, Nelson JL, Foley-Nelson T, Fischer JE (1988) Hyperammonemia in anorectic tumor-bearing rats. Life Sci 43:67–74
Cooper JLA, Plum F (1987) Biochemistry and physiology of brain ammonia. Physiol Rev 67:440–519
Cooper AJ, McDonald JM, Gelbard AS, Gledhill RF, Duffy TE (1979) The metabolic fate of 13 N-labeled ammonia in rat brain. J Biol Chem 254:4982–4992
Cudalbu C (2013) In vivo studies of brain metabolism in animal models of hepatic encephalopathy using 1H magnetic resonance spectroscopy. Metab Brain Dis 28:167–174
Dam G, Keiding S, Munk OL, Ott P, Vilstrup H, Bak LK, Waagepetersen HS, Schousboe A, Sørensen M (2013) Hepatic encephalopathy is associated with decreased cerebral oxygen metabolism and blood flow, not increased ammonia uptake. Hepatology 57:258–265
Dan H, Peng R-X, Ao Y, Liu Y-H (2008) Segment-specific proximal tubule injury in tripterygium glycosides intoxicated rats. J Biochem Mol Toxicol 22:422–428
Dasarathy S (2012) Consilience in sarcopenia of cirrhosis. J Cachex Sarcopenia Muscle 3:225–237
Dasarathy S, McCullough AJ, Muc S, Schneyer A, Bennett CD, Dodig M, Kalhan SC (2011) Sarcopenia associated with portosystemic shunting is reversed by follistatin. J Hepatol 54:915–921
DeMorrow S (2013) The ammonia hypothesis of hepatic encephalopathy should be revisited. J Cell Sci Ther 03:e110
Felipo V, Butterworth RF (2002) Neurobiology of ammonia. Prog Neurobiol 67:259–279
Fitzpatrick SM, Hetherington HP, Behar KL, Shulman RG (1989) Effects of acute hyperammonemia on cerebral amino acid metabolism and pHi in vivo, measured by 1H and 31P nuclear magnetic resonance. J Neurochem 52:741–749
Ganda OP, Ruderman NB (1976) Muscle nitrogen metabolism in chronic hepatic insufficiency. Metabolism 25:427–435
Ganz R, Swain M, Traber P, DalCanto M, Butterworth RF, Blei AT (1989) Ammonia-induced swelling of rat cerebral cortical slices: implications for the pathogenesis of brain edema in acute hepatic failure. Metab Brain Dis 4:213–223
Gordon DL, Krueger RA, Quie PG, Hostetter MK (1985) Amidation of C3 at the thiolester site: stimulation of chemiluminescence and phagocytosis by a new inflammatory mediator. J Immunol 134:3339–3345
Gregorios JB, Mozes LW, Norenberg LO, Norenberg MD (1985a) Morphologic effects of ammonia on primary astrocyte cultures. I. Light microscopic studies. J Neuropathol Exp Neurol 44:397–403
Gregorios JB, Mozes LW, Norenberg MD (1985b) Morphologic effects of ammonia on primary astrocyte cultures. II. Electron microscopic studies. J Neuropathol Exp Neurol 44:404–414
Guevara M, Bru C, Ginès P, Fernández-Esparrach G, Sort P, Bataller R, Jiménez W, Arroyo V, Rodés J (1998) Increased cerebrovascular resistance in cirrhotic patients with ascites. Hepatology 28:39–44
Halestrap AP, Woodfield KY, Connern CP (1997) Oxidative stress, thiol reagents, and membrane potential modulate the mitochondrial permeability transition by affecting nucleotide binding to the adenine nucleotide translocase. J Biol Chem 272:3346–3354
Hertz L, Kala G (2007) Energy metabolism in brain cells: effects of elevated ammonia concentrations. Metab Brain Dis 22:199–218
Hertz L, Zielke HR (2004) Astrocytic control of glutamatergic activity: astrocytes as stars of the show. Trends Neurosci 27:735–743
Holecek M (2013) Branched-chain amino acids and ammonia metabolism in liver disease: therapeutic implications. Nutrition 29:1186–1191
Ip YK, Chew SF (2010) Ammonia production, excretion, toxicity, and defense in fish: a review. Front Physiol 1:134
Jalan R, De Chiara F, Balasubramaniyan V, Andreola F, Khetan V, Malago M, Pinzani M, Mookerjee RP, Rombouts K (2016) Ammonia produces pathological changes in human hepatic stellate cells and is a target of therapy of portal hypertension. J Hepatol 64:823–833
Jayakumar AR, Liu M, Moriyama M, Ramakrishnan R, Forbush B, Reddy PVB, Norenberg MD (2008) Na-K-Cl cotransporter-1 in the mechanism of ammonia-induced astrocyte swelling. J Biol Chem 283:33874–33882
Jia B, Yu Z-J, Duan Z-F, Lü X-Q, Li J-J, Liu X-R, Sun R, Gao X-J, Wang Y-F, Yan J-Y et al (2014) Hyperammonaemia induces hepatic injury with alteration of gene expression profiles. Liver Int 34:748–758
Jiang W, Desjardins P, Butterworth RF (2009a) Cerebral inflammation contributes to encephalopathy and brain edema in acute liver failure: protective effect of minocycline. J Neurochem 109:485–493
Jiang W, Desjardins P, Butterworth RF (2009b) Direct evidence for central proinflammatory mechanisms in rats with experimental acute liver failure: protective effect of hypothermia. J Cereb Blood Flow Metab 29:944–952
Jones EA, Smallwood RA, Craigie A, Rosenoer VM (1969) The enterohepatic circulation of urea nitrogen. Clin Sci 37:825–836
Jones JC, Coombes JS, Macdonald GA (2012) Exercise capacity and muscle strength in patients with cirrhosis. Liver Transpl 18:146–151
Joshi D, O’Grady J, Patel A, Shawcross D, Connor S, Deasy N, Willars C, Bernal W, Wendon J, Auzinger G (2014) Cerebral oedema is rare in acute-on-chronic liver failure patients presenting with high-grade hepatic encephalopathy. Liver Int 34:362–366
Kanamori K, Ross BD (1997) Glial alkalinization detected in vivo by 1H-15 N heteronuclear multiple-quantum coherence-transfer NMR in severely hyperammonemic rat. J Neurochem 68:1209–1220
Kelly T, Kafitz KW, Roderigo C, Rose CR (2009) Ammonium-evoked alterations in intracellular sodium and pH reduce glial glutamate transport activity. Glia 57:921–934
Kikeri D, Sun A, Zeidel ML, Hebert SC (1989) Cell membranes impermeable to NH3. Nature 339:478–480
Kosenko E, Kaminsky Y, Kaminsky A, Valencia M, Lee L, Hermenegildo C, Felipo V (1997) Superoxide production and antioxidant enzymes in ammonia intoxication in rats. Free Radic Res 27:637–644
Kowaltowski AJ, Castilho RF, Vercesi AE (2001) Mitochondrial permeability transition and oxidative stress. FEBS Lett 495:12–15
Kyriakis JM, Avruch J (2001) Mammalian mitogen-activated protein kinase signal transduction pathways activated by stress and inflammation. Physiol Rev 81:807–869
Leke R, Bak LK, Iversen P, Sørensen M, Keiding S, Vilstrup H, Ott P, Portela LV, Schousboe A, Waagepetersen HS (2011) Synthesis of neurotransmitter GABA via the neuronal tricarboxylic acid cycle is elevated in rats with liver cirrhosis consistent with a high GABAergic tone in chronic hepatic encephalopathy. J Neurochem 117:824–832
Lichtenstein GR, Kaiser LR, Tuchman M, Palevsky HI, Kotloff RM, O’Brien CB, Furth EE, Raps EC, Berry GT (1997) Fatal hyperammonemia following orthotopic lung transplantation. Gastroenterology 112:236–240
Lichter-Konecki U, Mangin JM, Gordish-dressman H, Hoffman EP, Gallo V (2008) Gene expression profiling of astrocytes from hyperammonemic mice reveals altered pathways for water and potassium homeostasis in vivo. Glia 56:365–377
Ling H, Ardjomand P, Samvakas S, Simm A, Busch GL, Lang F, Sebekova K, Heidland A (1998) Mesangial cell hypertrophy induced by NH4Cl: role of depressed activities of cathepsins due to elevated lysosomal pH. Kidney Int 53:1706–1712
Liu K, Nagase H, Huang CG, Calamita G, Agre P (2006) Purification and functional characterization of aquaporin-8. Biol Cell 98:153–161
Lockwood AH, McDonald JM, Reiman RE, Gelbard AS, Laughlin JS, Duffy TE, Plum F (1979) The dynamics of ammonia metabolism in man. Effects of liver disease and hyperammonemia. J Clin Invest 63:449–460
Lux HD (1971) Ammonium and chloride extrusion: hyperpolarizing synaptic inhibition in spinal Motoneurons. Science 173:555–557
Marcaggi P, Jeanne M, Coles JA (2004) Neuron-glial trafficking of NH4+ and K+: separate routes of uptake into glial cells of bee retina. Eur J Neurosci 19:966–976
Marchetti P, Castedo M, Susin SA, Zamzami N, Hirsch T, Macho A, Haeffner A, Hirsch F, Geuskens M, Kroemer G (1996) Mitochondrial permeability transition is a central coordinating event of apoptosis. J Exp Med 184:1155–1160
Martinez-Hernandez A, Bell KP, Norenberg MD (1977) Glutamine synthetase: glial localization in brain. Science 195:1356–1358
Matkowskyj KA, Marrero JA, Carroll RE, Danilkovich AV, Green RM, Benya RV (1999) Azoxymethane-induced fulminant hepatic failure in C57BL/6 J mice: characterization of a new animal model. Am J Phys 277:G455–G462
Mirbod F, Schaller RA, Cole GT (2002) Purification and characterization of urease isolated from the pathogenic fungus Coccidioides immitis. Med Mycol 40:35–44
Mirbod-Donovan F, Schaller R, Hung C-Y, Xue J, Reichard U, Cole GT (2005) Urease produced by Coccidioides posadasii contributes to the virulence of this respiratory pathogen. Infect Immun 74:504–515
Mookerjee RP, Stadlbauer V, Lidder S, Wright GAK, Hodges SJ, Davies NA, Jalan R (2007) Neutrophil dysfunction in alcoholic hepatitis superimposed on cirrhosis is reversible and predicts the outcome. Hepatology 46:831–840
Moser H (1987) Electrophysiological evidence for ammonium as a substitute for potassium in activating the sodium pump in a crayfish sensory neuron. Can J Physiol Pharmacol 65:141–145
Murthy CR, Rama Rao KV, Bai G, Norenberg MD (2001) Ammonia-induced production of free radicals in primary cultures of rat astrocytes. J Neurosci Res 66:282–288
Nath KA, Hostetter MK, Hostetter TH (1991) Increased ammoniagenesis as a determinant of progressive renal injury. Am J Kidney Dis 17:654–657
Nimmerjahn A (2005) Resting microglial cells are highly dynamic Surveillants of brain parenchyma in vivo. Science 308:1314–1318
Norenberg MD (1998) Astroglial dysfunction in hepatic encephalopathy. Metab Brain Dis 13:319–335
Norenberg MD, Rama Rao KV, Jayakumar AR (2009) Signaling factors in the mechanism of ammonia neurotoxicity. Metab Brain Dis 24:103–117
Ohnuma-Koyama A, Yoshida T, Tajima-Horiuchi H, Takahashi N, Yamaguchi S, Ohtsuka R, Takeuchi-Kashimoto Y, Kuwahara M, Takeda M, Nakashima N et al (2013) Didecyldimethylammonium chloride induces pulmonary fibrosis in association with TGF-beta signaling in mice. Exp Toxicol Pathol 65:1003–1009
Olde Damink SWM, Jalan R, Deutz NEP, Redhead DN, Dejong CHC, Hynd P, Jalan RA, Hayes PC, Soeters PB (2003) The kidney plays a major role in the hyperammonemia seen after simulated or actual GI bleeding in patients with cirrhosis. Hepatology 37:1277–1285
Ortiz-Pujols S, Jones SW, Short KA, Morrell MR, Bermudez CA, Tilley SL, Cairns BA (2014) Management and sequelae of a 41-year-old Jehovah’s witness with severe anhydrous ammonia inhalation injury. J Burn Care Res 35:e180–e183
Orvell BD, Wesson LG (1976) Some effects of ammonium salts on renal histology and function in the dog. Nephron 16:42–49
Ott P, Clemmesen O, Larsen FS (2005) Cerebral metabolic disturbances in the brain during acute liver failure: from hyperammonemia to energy failure and proteolysis. Neurochem Int 47:13–18
Owen EE, Johnson JH, Tyor MP (1961) The effect of induced hyperammonemia on renal ammonia metabolism. J Clin Invest 40:215–221
Paulsen RE, Contestabile A, Villani L, Fonnum F (1987) An in vivo model for studying function of brain tissue temporarily devoid of glial cell metabolism: the use of fluorocitrate. J Neurochem 48:1377–1385
Phongsamran PV, Kim JW, Cupo Abbott J, Rosenblatt A (2010) Pharmacotherapy for hepatic encephalopathy. Drugs 70:1131–1148
Qiu J, Tsien C, Thapalaya S, Narayanan A, Weihl CC, Ching JK, Eghtesad B, Singh K, Fu X, Dubyak G et al (2012) Hyperammonemia-mediated autophagy in skeletal muscle contributes to sarcopenia of cirrhosis. Am J Physiol Endocrinol Metab 303:E983–E993
Qiu J, Thapaliya S, Runkana A, Yang Y, Tsien C, Mohan ML, Narayanan A, Eghtesad B, Mozdziak PE, McDonald C et al (2013) Hyperammonemia in cirrhosis induces transcriptional regulation of myostatin by an NF-κB-mediated mechanism. Proc Natl Acad Sci U S A 110:18162–18167
Rabkin R, Palathumpat M, Tsao T (1993) Ammonium chloride alters renal tubular cell growth and protein turnover. Lab Invest 68:427–438
Rangroo Thrane V, Thrane AS, Chanag J, Alleluia V, Nagelhus EA, Nedergaard M (2012) Real-time analysis of microglial activation and motility in hepatic and hyperammonemic encephalopathy. Neuroscience 220:247–255
Rangroo Thrane V, Thrane AS, Wang F, Cotrina ML, Smith NA, Chen M, Xu Q, Kang N, Fujita T, Nagelhus EA et al (2013) Ammonia triggers neuronal disinhibition and seizures by impairing astrocyte potassium buffering. Nat Med 19:1643–1648
Ransohoff RM, Cardona AE (2010) The myeloid cells of the central nervous system parenchyma. Nature 468:253–262
Rao KVR, Verkman AS, Curtis KM, Norenberg MD (2014) Aquaporin-4 deletion in mice reduces encephalopathy and brain edema in experimental acute liver failure. Neurobiol Dis 63:222–228
Ratnakumari L, Qureshi IA, Butterworth RF (1992) Effects of congenital hyperammonemia on the cerebral and hepatic levels of the intermediates of energy metabolism in spf mice. Biochem Biophys Res Commun 184:746–751
Robel S, Buckingham SC, Boni JL, Campbell SL, Danbolt NC, Riedemann T, Sutor B, Sontheimer H (2015) Reactive Astrogliosis causes the development of spontaneous seizures. J Neurosci 35:3330–3345
Rockey DC (1997) New concepts in the pathogenesis of portal hypertension: hepatic wounding and stellate cell contractility. Clin Liver Dis 1:13–29
Rodrigo R, Felipo V (2006) Brain regional alterations in the modulation of the glutamate-nitric oxide-cGMP pathway in liver cirrhosis. Role of hyperammonemia and cell types involved. Neurochem Int 48:472–477
Rodrigo R, Cauli O, Gomez-Pinedo U, Agusti A, Hernandez-Rabaza V, Garcia-Verdugo J-M, Felipo V (2010) Hyperammonemia induces neuroinflammation that contributes to cognitive impairment in rats with hepatic encephalopathy. Gastroenterology 139:675–684
Rose C, Kresse W, Kettenmann H (2005) Acute insult of ammonia leads to calcium-dependent glutamate release from cultured astrocytes, an effect of pH. J Biol Chem 280:20937–20944
Rovira A, Alonso J, Córdoba J (2008) MR imaging findings in hepatic encephalopathy. AJNR Am J Neuroradiol 29:1612–1621
Saparov SM, Liu K, Agre P, Pohl P (2007) Fast and selective ammonia transport by aquaporin-8. J Biol Chem 282:5296–5301
Satpute R, Lomash V, Hariharakrishnan J, Rao P, Singh P, Gujar N, Bhattacharya R (2014) Oxidative stress and tissue pathology caused by subacute exposure to ammonium acetate in rats and their response to treatments with alpha-ketoglutarate and N-acetyl cysteine. Toxicol Ind Health 30:12–24
Schachter D, Sang JC (1997) Regional differentiation in the rat aorta for a novel signaling pathway: leucine to glutamate. Am J Phys 273:H1484–H1492
Shaik IH, Miah MK, Bickel U, Mehvar R (2013) Effects of short-term portacaval anastomosis on the peripheral and brain disposition of the blood–brain barrier permeability marker sodium fluorescein in rats. Brain Res 1531:84–93
Shanely RA, Coast JR (2002) Effect of ammonia on in vitro diaphragmatic contractility, fatigue and recovery. Respiration 69:534–541
Shawcross DL, Wright GAK, Stadlbauer V, Hodges SJ, Davies NA, Wheeler-Jones C, Pitsillides AA, Jalan R (2008) Ammonia impairs neutrophil phagocytic function in liver disease. Hepatology 48:1202–1212
Sinke AP, Jayakumar AR, Panickar KS, Moriyama M, Reddy PVB, Norenberg MD (2008) NFkappaB in the mechanism of ammonia-induced astrocyte swelling in culture. J Neurochem 106:2302–2311
Sjöblom E, Höjer J, Kulling PEJ, Stauffer K, Suneson A, Ludwigs U (1999) A placebo-controlled experimental study of steroid inhalation therapy in ammonia-induced lung injury. J Toxicol Clin Toxicol 37:59–67
Skowronska M, Albrecht J (2012) Alterations of blood brain barrier function in hyperammonemia: an overview. Neurotox Res 21:236–244
Sørensen M (2013) Update on cerebral uptake of blood ammonia. Metab Brain Dis 28:155–159
Swain MS, Blei AT, Butterworth RF, Kraig RP (1991) Intracellular pH rises and astrocytes swell after portacaval anastomosis in rats. Am J Phys 261:R1491–R1496
Szerb JC, Butterworth RF (1992) Effect of ammonium ions on synaptic transmission in the mammalian central nervous system. Prog Neurobiol 39:135–153
Tanigami H, Rebel A, Martin LJ, Chen T-Y, Brusilow SW, Traystman RJ, Koehler RC (2005) Effect of glutamine synthetase inhibition on astrocyte swelling and altered astroglial protein expression during hyperammonemia in rats. Neuroscience 131:437–449
Thumburu KK, Taneja S, Vasishta RK, Dhiman RK (2012) Neuropathology of acute liver failure. Neurochem Int 60:672–675
Tsien CD, McCullough AJ, Dasarathy S (2012) Late evening snack: exploiting a period of anabolic opportunity in cirrhosis. J Gastroenterol Hepatol 27:430–441
Tsien C, Davuluri G, Singh D, Allawy A, Have GAMT, Thapaliya S, Schulze JM, Barnes D, McCullough AJ, Engelen MPKJ et al (2015) Metabolic and molecular responses to leucine-enriched branched chain amino acid supplementation in the skeletal muscle of alcoholic cirrhosis. Hepatology 61:2018–2029
Wang F, Smith NA, Xu Q, Fujita T, Baba A, Matsuda T, Takano T, Bekar L, Nedergaard M (2012) Astrocytes modulate neural network activity by Ca2 + −dependent uptake of extracellular K+. Sci Signal 5:ra26
Waniewski RA (1992) Physiological levels of ammonia regulate glutamine synthesis from extracellular glutamate in astrocyte cultures. J Neurochem 58:167–174
Willard-Mack CL, Koehler RC, Hirata T, Cork LC, Takahashi H, Traystman RJ, Brusilow SW (1996) Inhibition of glutamine synthetase reduces ammonia-induced astrocyte swelling in rat. Neuroscience 71:589–599
Wise HZ, Hung C-Y, Whiston E, Taylor JW, Cole GT (2013) Extracellular ammonia at sites of pulmonary infection with Coccidioides posadasii contributes to severity of the respiratory disease. Microb Pathog 59-60:19–28
Wootton JC (1983) Re-assessment of ammonium-ion affinities of NADP-specific glutamate dehydrogenases. Activation of the Neurospora crassa enzyme by ammonium and rubidium ions. Biochem J 209:527–531
Xia Y, Tsai AL, Berka V, Zweier JL (1998) Superoxide generation from endothelial nitric-oxide synthase. A Ca2+/calmodulin-dependent and tetrahydrobiopterin regulatory process. J Biol Chem 273:25804–25808
Yamamoto Y, Takahashi Y, Imai K, Mishima N, Yazawa R, Inoue K, Itoh K, Kagawa Y, Inoue Y (2013) Risk factors for hyperammonemia in pediatric patients with epilepsy. Epilepsia 54:983–989
Ytrebø LM, Sen S, Rose C, Davies NA, Nedredal GI, Fuskevaag O-M, Have GAMT, Prinzen FW, Williams R, Deutz NEP et al (2006) Systemic and regional hemodynamics in pigs with acute liver failure and the effect of albumin dialysis. Scand J Gastroenterol 41:1350–1360
Zemtsova I, Görg B, Keitel V, Bidmon H-J, Schrör K, Häussinger D (2011) Microglia activation in hepatic encephalopathy in rats and humans. Hepatology 54:204–215
Zielinska M, Ruszkiewicz J, Hilgier W, Fręśko I, Albrecht J (2011) Hyperammonemia increases the expression and activity of the glutamine/arginine transporter y + LAT2 in rat cerebral cortex: implications for the nitric oxide/cGMP pathway. Neurochem Int 58:190–195
Zieve L (1987) Pathogenesis of hepatic encephalopathy. Metab Brain Dis 2:147–165
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Disclosures
The authors have no conflicts to disclose. SD supported in part by NIH grants: RO1 DK 83414, R21 AA 022742, UO1 AA021893 and P50 AA024333 8236.
Rights and permissions
About this article
Cite this article
Dasarathy, S., Mookerjee, R.P., Rackayova, V. et al. Ammonia toxicity: from head to toe?. Metab Brain Dis 32, 529–538 (2017). https://doi.org/10.1007/s11011-016-9938-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11011-016-9938-3
Keywords
Profiles
- Christopher F. Rose View author profile