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Sfera A, Andronescu L, Britt WG, Himsl K, Klein C, Rahman L, Kozlakidis Z. Receptor-Independent Therapies for Forensic Detainees with Schizophrenia-Dementia Comorbidity. Int J Mol Sci 2023; 24:15797. [PMID: 37958780 PMCID: PMC10647468 DOI: 10.3390/ijms242115797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/23/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023] Open
Abstract
Forensic institutions throughout the world house patients with severe psychiatric illness and history of criminal violations. Improved medical care, hygiene, psychiatric treatment, and nutrition led to an unmatched longevity in this population, which previously lived, on average, 15 to 20 years shorter than the public at large. On the other hand, longevity has contributed to increased prevalence of age-related diseases, including neurodegenerative disorders, which complicate clinical management, increasing healthcare expenditures. Forensic institutions, originally intended for the treatment of younger individuals, are ill-equipped for the growing number of older offenders. Moreover, as antipsychotic drugs became available in 1950s and 1960s, we are observing the first generation of forensic detainees who have aged on dopamine-blocking agents. Although the consequences of long-term treatment with these agents are unclear, schizophrenia-associated gray matter loss may contribute to the development of early dementia. Taken together, increased lifespan and the subsequent cognitive deficit observed in long-term forensic institutions raise questions and dilemmas unencountered by the previous generations of clinicians. These include: does the presence of neurocognitive dysfunction justify antipsychotic dose reduction or discontinuation despite a lifelong history of schizophrenia and violent behavior? Should neurolipidomic interventions become the standard of care in elderly individuals with lifelong schizophrenia and dementia? Can patients with schizophrenia and dementia meet the Dusky standard to stand trial? Should neurocognitive disorders in the elderly with lifelong schizophrenia be treated differently than age-related neurodegeneration? In this article, we hypothesize that gray matter loss is the core symptom of schizophrenia which leads to dementia. We hypothesize further that strategies to delay or stop gray matter depletion would not only improve the schizophrenia sustained recovery, but also avert the development of major neurocognitive disorders in people living with schizophrenia. Based on this hypothesis, we suggest utilization of both receptor-dependent and independent therapeutics for chronic psychosis.
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Affiliation(s)
- Adonis Sfera
- Paton State Hospital, 3102 Highland Ave, Patton, CA 92369, USA; (L.A.); (K.H.)
- School of Behavioral Health, Loma Linda University, 11139 Anderson St., Loma Linda, CA 92350, USA
- Department of Psychiatry, University of California, Riverside 900 University Ave, Riverside, CA 92521, USA
| | - Luminita Andronescu
- Paton State Hospital, 3102 Highland Ave, Patton, CA 92369, USA; (L.A.); (K.H.)
| | - William G. Britt
- Department of Psychiatry, School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA;
| | - Kiera Himsl
- Paton State Hospital, 3102 Highland Ave, Patton, CA 92369, USA; (L.A.); (K.H.)
| | - Carolina Klein
- California Department of State Hospitals, Sacramento, CA 95814, USA;
| | - Leah Rahman
- Department of Neuroscience, University of Oregon, 1585 E 13th Ave, Eugene, OR 97403, USA;
| | - Zisis Kozlakidis
- International Agency for Research on Cancer, 69366 Lyon Cedex, France;
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Nadalin S, Zatković L, Peitl V, Karlović D, Vidrih B, Puljić A, Pavlić SD, Buretić-Tomljanović A. Association between PLA2 gene polymorphisms and treatment response to antipsychotic medications: A study of antipsychotic-naïve first-episode psychosis patients and nonadherent chronic psychosis patients. Prostaglandins Leukot Essent Fatty Acids 2023; 194:102578. [PMID: 37290257 DOI: 10.1016/j.plefa.2023.102578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 05/26/2023] [Accepted: 05/31/2023] [Indexed: 06/10/2023]
Abstract
Here we investigated whether antipsychotic treatment was influenced by three polymorphisms: rs10798059 (BanI) in the phospholipase A2 (PLA2)G4A gene, rs4375 in PLA2G6, and rs1549637 in PLA2G4C. A total of 186 antipsychotic-naïve first-episode psychosis patients or nonadherent chronic psychosis individuals (99 males and 87 females) were genotyped by polymerase chain reaction analysis/restriction fragment length polymorphism. At baseline, and after 8 weeks of treatment with various antipsychotic medications, we assessed patients' Positive and Negative Syndrome Scale (PANSS) scores, PANSS factors, and metabolic syndrome-related parameters (fasting plasma lipid and glucose levels, and body mass index). We found that PLA2G4A polymorphism influenced changes in PANSS psychopathology, and PLA2G6 polymorphism influenced changes in PANSS psychopathology and metabolic parameters. PLA2G4C polymorphism did not show any impact on PANSS psychopathology or metabolic parameters. The polymorphisms' effect sizes were estimated as moderate to strong, with contributions ranging from around 6.2-15.7%. Furthermore, the polymorphisms' effects manifested in a gender-specific manner.
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Affiliation(s)
- Sergej Nadalin
- Department of Psychiatry, General Hospital "Dr. Josip Benčević", Slavonski Brod, Croatia; School of Medicine, Catholic University of Croatia, Zagreb, Croatia.
| | - Lena Zatković
- Hospital pharmacy, Clinical Hospital Center Rijeka, Rijeka, Croatia
| | - Vjekoslav Peitl
- School of Medicine, Catholic University of Croatia, Zagreb, Croatia; Department of Psychiatry, Sestre Milosrdnice University Hospital Center, Zagreb, Croatia
| | - Dalibor Karlović
- School of Medicine, Catholic University of Croatia, Zagreb, Croatia; Department of Psychiatry, Sestre Milosrdnice University Hospital Center, Zagreb, Croatia
| | - Branka Vidrih
- School of Medicine, Catholic University of Croatia, Zagreb, Croatia; Department of Psychiatry, Sestre Milosrdnice University Hospital Center, Zagreb, Croatia
| | - Antonia Puljić
- School of Medicine, Catholic University of Croatia, Zagreb, Croatia; Department of Psychiatry, Sestre Milosrdnice University Hospital Center, Zagreb, Croatia
| | - Sanja Dević Pavlić
- Department of Medical Biology and Genetics, Faculty of Medicine, University of Rijeka, Rijeka, Croatia
| | - Alena Buretić-Tomljanović
- Department of Medical Biology and Genetics, Faculty of Medicine, University of Rijeka, Rijeka, Croatia
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Nadalin S, Jakovac H, Peitl V, Karlović D, Buretić-Tomljanović A. Dysregulated inflammation may predispose patients with serious mental illnesses to severe COVID‑19 (Review). Mol Med Rep 2021; 24:611. [PMID: 34184073 PMCID: PMC8258463 DOI: 10.3892/mmr.2021.12250] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 05/21/2021] [Indexed: 12/12/2022] Open
Abstract
Genetic and nongenetic factors associated with an increased inflammatory response may mediate a link between severe coronavirus disease 2019 (COVID‑19) and serious mental illness (SMI). However, systematic assessment of inflammatory response‑related factors associated with SMI that could influence COVID‑19 outcomes is lacking. In the present review, dietary patterns, smoking and the use of psychotropic medications are discussed as potential extrinsic risk factors and angiotensin‑converting enzyme (ACE) insertion/deletion (I/D) gene polymorphisms are considered as potential intrinsic risk factors. A genetics‑based prediction model for SMI using ACE‑I/D genotyping is also proposed for use in patients experiencing severe COVID‑19. Furthermore, the literature suggests that ACE inhibitors may have protective effects against SMI or severe COVID‑19, which is often linked to hypertension and other cardiovascular comorbidities. For this reason, we hypothesize that using these medications to treat patients with severe COVID‑19 might yield improved outcomes, including in the context of SMI associated with COVID‑19.
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Affiliation(s)
- Sergej Nadalin
- Department of Medical Biology and Genetics, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia
| | - Hrvoje Jakovac
- Department of Physiology and Immunology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia
| | - Vjekoslav Peitl
- Department of Psychiatry, Sestre Milosrdnice University Hospital Center and Catholic University of Croatia, 10000 Zagreb, Croatia
| | - Dalibor Karlović
- Department of Psychiatry, Sestre Milosrdnice University Hospital Center and Catholic University of Croatia, 10000 Zagreb, Croatia
| | - Alena Buretić-Tomljanović
- Department of Medical Biology and Genetics, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia
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Drukarch B, Jacobs GE, Wilhelmus MMM. Solving the crisis in psychopharmacological research: Cellular-membrane(s) pharmacology to the rescue? Biomed Pharmacother 2020; 130:110545. [PMID: 32731134 DOI: 10.1016/j.biopha.2020.110545] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/07/2020] [Accepted: 07/20/2020] [Indexed: 02/07/2023] Open
Abstract
There is an urgent need for the introduction of novel and better (i.e., improved risk-benefit profile) compounds for the treatment of major psychiatric disorders, in particular mood and psychotic disorders. However, despite increased societal awareness and a rising public and professional demand for such agents from patients and physicians, the pharmaceutical industry continues to close down its psychopharmacology research facilities in reaction to the lack of success with the search for new psychotropics. It is high time to stop this untoward trend and explore "new" lines of investigation to solve the current crisis in psychopharmacological research. In line with the prevailing molecular view in drug research in general, also in psychopharmacology mechanistic explanations for drug effects are "traditionally" looked for at the level of molecular targets, like receptors and transporters. Also, more recent approaches, although using so-called systems- and function-based approaches to model the multidimensional characteristics of psychiatric disorders and psychotropic drug action, still emphasize this search strategy for new therapeutic leads by identification of single molecules or molecular pathways. This "psychomolecular gaze" overlooks and disregards the fact that psychotropic agents usually are highly hydrophobic and amphipathic/amphiphilic agents that, in addition to their interaction with membrane-bound proteins in the form of e.g. receptors or transporters, also interact strongly with the lipid component of cellular membranes. Here we suggest to develop a program of systematic, whole-cell level based, investigation into the role of these physical-chemical cellular membrane interactions in the therapeutic action of known psychotherapeutics. This complementary yet conceptually different approach, in our opinion, will complement drug development in psychopharmacology and thereby assist in overcoming the current crisis. In this way the "old" physical theory of drug action, which antedates the current, primary molecular, paradigm may offer "new" options for lead discovery in psychopharmacological research.
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Affiliation(s)
- B Drukarch
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Anatomy and Neurosciences, Amsterdam Neuroscience, De Boelelaan 1117, Amsterdam, the Netherlands.
| | - G E Jacobs
- Centre for Human Drug Research, Leiden, the Netherlands; Department of Psychiatry, Leiden University Medical Center, Leiden, the Netherlands
| | - M M M Wilhelmus
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Anatomy and Neurosciences, Amsterdam Neuroscience, De Boelelaan 1117, Amsterdam, the Netherlands
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Nadalin S, Jonovska S, Šendula Jengić V, Buretić-Tomljanović A. An association between niacin skin flush response and plasma triglyceride levels in patients with schizophrenia. Prostaglandins Leukot Essent Fatty Acids 2020; 155:102084. [PMID: 32126479 DOI: 10.1016/j.plefa.2020.102084] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 02/03/2020] [Accepted: 02/18/2020] [Indexed: 01/31/2023]
Abstract
The available data suggest that abnormalities of arachidonic acid-related signaling may be of relevance in attenuated niacin-induced flush responses and lipid and glucose metabolism disturbances, which are all common among individuals with schizophrenia. We previously demonstrated attenuated skin flush responses to niacin in patients with schizophrenia. Here we investigated whether these niacin responses might be associated with elevated plasma lipid and glucose concentrations in this patient group. We found that higher plasma triglyceride levels were associated with higher total volumetric niacin response (VNR) values and that the VNR accounted for ~14.2% of the variability in triglyceride levels. Triglyceride levels were significantly higher in patients with a positive niacin skin flush response compared to those with absent niacin skin flushing at the 5-minute interval with niacin concentrations of 0.1 and 0.01 M, and at the 10- and 15-minute intervals with a niacin concentration of 0.001 M.
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Affiliation(s)
- Sergej Nadalin
- Department of Medical Biology and Genetics, School of Medicine, University of Rijeka, Braće Branchetta 20, 51000 Rijeka, Croatia.
| | | | | | - Alena Buretić-Tomljanović
- Department of Medical Biology and Genetics, School of Medicine, University of Rijeka, Braće Branchetta 20, 51000 Rijeka, Croatia
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Krutetskaya ZI, Milenina LS, Naumova AA, Butov SN, Antonov VG, Nozdrachev AD. Phospholipase A 2 Inhibitors Modulate the Effect of Trifluoperazine on the Intracellular Ca 2+ Concentration in Macrophages. DOKL BIOCHEM BIOPHYS 2018. [PMID: 29536308 DOI: 10.1134/s1607672918010118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Using Fura-2AM microfluorimetry, it was shown for the first time that phospholipase A2 inhibitors 4-bromophenacyl bromide and glucocorticosteroids prednisolone and dexamethasone attenuate Ca2+ responses induced by neuroleptic trifluoperazine in macrophages. The results suggest the involvement of phospholipase A2 and arachidonic acid metabolism cascade in the effect of trifluoperazine on intracellular Ca2+ concentration in macrophages.
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Affiliation(s)
- Z I Krutetskaya
- St. Petersburg State University, St. Petersburg, 199034, Russia.
| | - L S Milenina
- St. Petersburg State University, St. Petersburg, 199034, Russia
| | - A A Naumova
- St. Petersburg State University, St. Petersburg, 199034, Russia
| | - S N Butov
- St. Petersburg State University, St. Petersburg, 199034, Russia
| | - V G Antonov
- St. Petersburg State University, St. Petersburg, 199034, Russia
| | - A D Nozdrachev
- St. Petersburg State University, St. Petersburg, 199034, Russia
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Oruch R, Pryme IF, Engelsen BA, Lund A. Neuroleptic malignant syndrome: an easily overlooked neurologic emergency. Neuropsychiatr Dis Treat 2017; 13:161-175. [PMID: 28144147 PMCID: PMC5248946 DOI: 10.2147/ndt.s118438] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Neuroleptic malignant syndrome is an unpredictable iatrogenic neurologic emergency condition, mainly arising as an idiosyncratic reaction to antipsychotic agent use. It is characterized by distinctive clinical features including a change in mental status, generalized rigidity, hyperpyrexia, and dysautonomia. It can be lethal if not diagnosed and treated properly. Mortality and morbidity attributed to this syndrome have recently declined markedly due to greater awareness, earlier diagnosis, and intensive care intervention. In most cases, the syndrome occurs as a result of a rapid increase in a dose of neuroleptic, especially one of the long-acting ones. Pathophysiology behind this syndrome is attributed to a dopamine receptor blockade inside the neurons rendered by the offending drug and excessive calcium release from the sarcoplasmic reticulum of skeletal myocytes. Laboratory tests, although not diagnostic, may assist in assessing the severity of the syndrome and also the consequent complications. The syndrome has been described in all age groups and occurs more in males than in females. Genetics appears to be central regarding the etiology of the syndrome. Stopping the use of the offending agent, cold intravenous fluids, and removal of the causative agent and its possible active metabolites is the cornerstone of treatment. Periodic observation of psychotic patients recently started on antipsychotic medications, especially those being treated with depot preparations, may aid to an early diagnosis of the syndrome and lead to early treatment.
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Affiliation(s)
- Ramadhan Oruch
- Department of Pharmacology and Toxicology, School of Pharmacy, Benghazi University, Benghazi, Libya
| | | | | | - Anders Lund
- Department of Clinical Medicine, Section of Psychiatry, University of Bergen, Bergen, Norway
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Oruch R, Elderbi MA, Khattab HA, Pryme IF, Lund A. Lithium: A review of pharmacology, clinical uses, and toxicity. Eur J Pharmacol 2014; 740:464-73. [DOI: 10.1016/j.ejphar.2014.06.042] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 06/20/2014] [Accepted: 06/20/2014] [Indexed: 01/10/2023]
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Assies J, Mocking RJT, Lok A, Ruhé HG, Pouwer F, Schene AH. Effects of oxidative stress on fatty acid- and one-carbon-metabolism in psychiatric and cardiovascular disease comorbidity. Acta Psychiatr Scand 2014; 130:163-80. [PMID: 24649967 PMCID: PMC4171779 DOI: 10.1111/acps.12265] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/20/2014] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Cardiovascular disease (CVD) is the leading cause of death in severe psychiatric disorders (depression, schizophrenia). Here, we provide evidence of how the effects of oxidative stress on fatty acid (FA) and one-carbon (1-C) cycle metabolism, which may initially represent adaptive responses, might underlie comorbidity between CVD and psychiatric disorders. METHOD We conducted a literature search and integrated data in a narrative review. RESULTS Oxidative stress, mainly generated in mitochondria, is implicated in both psychiatric and cardiovascular pathophysiology. Oxidative stress affects the intrinsically linked FA and 1-C cycle metabolism: FAs decrease in chain length and unsaturation (particularly omega-3 polyunsaturated FAs), and lipid peroxidation products increase; the 1-C cycle shifts from the methylation to transsulfuration pathway (lower folate and higher homocysteine and antioxidant glutathione). Interestingly, corresponding alterations were reported in psychiatric disorders and CVD. Potential mechanisms through which FA and 1-C cycle metabolism may be involved in brain (neurocognition, mood regulation) and cardiovascular system functioning (inflammation, thrombosis) include membrane peroxidizability and fluidity, eicosanoid synthesis, neuroprotection and epigenetics. CONCLUSION While oxidative-stress-induced alterations in FA and 1-C metabolism may initially enhance oxidative stress resistance, persisting chronically, they may cause damage possibly underlying (co-occurrence of) psychiatric disorders and CVD. This might have implications for research into diagnosis and (preventive) treatment of (CVD in) psychiatric patients.
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Affiliation(s)
- J Assies
- Program for Mood Disorders, Department of Psychiatry, Academic Medical Center, Amsterdam
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10
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Effect of serotonin on platelet function in cocaine exposed blood. Sci Rep 2014; 4:5945. [PMID: 25091505 PMCID: PMC4121605 DOI: 10.1038/srep05945] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 06/18/2014] [Indexed: 11/21/2022] Open
Abstract
5-hydroxytryptamine (5-HT) reuptake inhibitors counteract the pro-thrombotic effect of elevated plasma 5-HT by down-regulating the 5-HT uptake rates of platelets. Cocaine also down-regulates the platelet 5-HT uptake rates but in contrast, the platelets of cocaine-injected mice show a much higher aggregation rate than the platelets of control mice. To examine the involvement of plasma 5-HT in cocaine-mediated platelet aggregation, we studied the function of platelets isolated from wild-type and transgenic, peripheral 5-HT knock-out (TPH1-KO) mice, and cocaine-insensitive dopamine transporter knock in (DAT-KI) mice. In cocaine-injected mice compared to the control mice, the plasma 5-HT level as well as the surface level of P-selectin was elevated; in vitro platelet aggregation in the presence of type I fibrillar collagen was enhanced. However, cocaine injection lowered the 5-HT uptake rates of platelets and increased the plasma 5-HT levels of the DAT-KI mice but did not change their platelets aggregation rates further which are already hyper-reactive. Furthermore, the in vitro studies supporting these in vivo findings suggest that cocaine mimics the effect of elevated plasma 5-HT level on platelets and in 5-HT receptor- and transporter-dependent pathways in a two-step process propagates platelet aggregation by an additive effect of 5-HT and nonserotonergic catecholamine.
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Hempel C, Nörenberg W, Sobottka H, Urban N, Nicke A, Fischer W, Schaefer M. The phenothiazine-class antipsychotic drugs prochlorperazine and trifluoperazine are potent allosteric modulators of the human P2X7 receptor. Neuropharmacology 2013; 75:365-79. [PMID: 23954492 DOI: 10.1016/j.neuropharm.2013.07.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 07/19/2013] [Accepted: 07/22/2013] [Indexed: 01/31/2023]
Abstract
P2X7, an ATP-gated cation channel, is involved in immune cell activation, hyperalgesia and neuropathic pain. By regulating cytokine release in the brain, P2X7 has been linked to the pathophysiology of mood disorders and schizophrenia. We here assess the impact of 123 drugs that act in the central nervous system on human P2X7. Most prominently, the tricyclic antipsychotics prochlorperazine (PCP) and trifluoperazine (TFP) potently inhibited P2X7-mediated Ca2+ entry, dye permeation and ionic currents. In divalent cation-containing bath solutions or after prolonged incubation, ATP-evoked P2X7 currents were inhibited by 10 μM PCP. This effect was not related to dopamine receptor antagonism. Surprisingly, PCP co-applied with ATP enhanced inward currents in bath solutions with low divalent cation concentrations. Intracellular perfusion with PCP did not substitute for the extracellularly applied drug, indicating that its binding sites are accessible from the extracellular space. Since P2X7 current potentiation by PCP was voltage-dependent, at least one site may be located within the electrical field of the membrane. While the channel opening and closure kinetic was altered by PCP, the apparent affinity of ATP remained unchanged (potentiation) or changed slightly (inhibition). Measurements in human monocyte-derived macrophages confirmed the PCP-induced inhibition of ATP-evoked Ca2+ influx, Yo-Pro-1 permeability, and whole cell currents. Interestingly, neither heterologously expressed rat or mouse P2X7 nor native P2X7 in rat astrocyte cultures or in mouse bone marrow-derived macrophages were inhibited by perazines with a similar potency. We conclude that perazine-type neuroleptics are potent, but species-selective allosteric modulators of human but not murine P2X7 receptors.
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Affiliation(s)
- Christoph Hempel
- Rudolf-Boehm-Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Härtelstrasse 16-18, 04107 Leipzig, Germany
| | - Wolfgang Nörenberg
- Rudolf-Boehm-Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Härtelstrasse 16-18, 04107 Leipzig, Germany
| | - Helga Sobottka
- Rudolf-Boehm-Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Härtelstrasse 16-18, 04107 Leipzig, Germany
| | - Nicole Urban
- Rudolf-Boehm-Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Härtelstrasse 16-18, 04107 Leipzig, Germany
| | - Annette Nicke
- Max-Planck-Institute for Experimental Medicine, Hermann Rein-Str. 3, 37075 Göttingen, Germany
| | - Wolfgang Fischer
- Rudolf-Boehm-Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Härtelstrasse 16-18, 04107 Leipzig, Germany
| | - Michael Schaefer
- Rudolf-Boehm-Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Härtelstrasse 16-18, 04107 Leipzig, Germany.
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Nenadic I, Dietzek M, Langbein K, Rzanny R, Gussew A, Reichenbach JR, Sauer H, Smesny S. Effects of olanzapine on 31P MRS metabolic markers in schizophrenia. Hum Psychopharmacol 2013; 28:91-3. [PMID: 23225665 DOI: 10.1002/hup.2274] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Accepted: 09/28/2012] [Indexed: 11/07/2022]
Abstract
Antipsychotic drug action might include mechanisms related to normalising phospholipid and high-energy metabolism. We applied brain metabolic imaging with (31)P magnetic resonance spectroscopy ((31)P MRS) and two-dimensional chemical shift imaging to assess changes of metabolism of phospholipids and high-energy phosphates in schizophrenia patients at baseline (four antipsychotic-naïve and three off antipsychotics) and at follow-up, after 6 weeks of treatment with olanzapine. Results indicate a significant increase of adenosine-triphosphate (ATP) in the right inferior temporal cortex and a trend towards ATP decrease in the left cerebellum. This suggests a shift in high-energy phosphates (rather than phospholipids), possibly related to normalisation of functioning in these areas.
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Affiliation(s)
- Igor Nenadic
- Department of Psychiatry and Psychotherapy, Jena University Hospital, Jena, Germany.
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Canfrán-Duque A, Casado ME, Pastor O, Sánchez-Wandelmer J, de la Peña G, Lerma M, Mariscal P, Bracher F, Lasunción MA, Busto R. Atypical antipsychotics alter cholesterol and fatty acid metabolism in vitro. J Lipid Res 2012; 54:310-24. [PMID: 23175778 DOI: 10.1194/jlr.m026948] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Haloperidol, a typical antipsychotic, has been shown to inhibit cholesterol biosynthesis by affecting Δ(7)-reductase, Δ(8,7)-isomerase, and Δ(14)-reductase activities, which results in the accumulation of different sterol intermediates. In the present work, we investigated the effects of atypical or second-generation antipsychotics (SGA), such as clozapine, risperidone, and ziprasidone, on intracellular lipid metabolism in different cell lines. All the SGAs tested inhibited cholesterol biosynthesis. Ziprasidone and risperidone had the same targets as haloperidol at inhibiting cholesterol biosynthesis, although with different relative activities (ziprasidone > haloperidol > risperidone). In contrast, clozapine mainly affected Δ(24)-reductase and Δ(8,7)-isomerase activities. These amphiphilic drugs also interfered with the LDL-derived cholesterol egress from the endosome/lysosome compartment, thus further reducing the cholesterol content in the endoplasmic reticulum. This triggered a homeostatic response with the stimulation of sterol regulatory element-binding protein (SREBP)-regulated gene expression. Treatment with SGAs also increased the synthesis of complex lipids (phospholipids and triacylglycerides). Once the antipsychotics were removed from the medium, a rebound in the cholesterol biosynthesis rate was detected, and the complex-lipid synthesis further increased. In this condition, apolipoprotein B secretion was also stimulated as demonstrated in HepG2 cells. These effects of SGAs on lipid homeostasis may be relevant in the metabolic side effects of antipsychotics, especially hypertriglyceridemia.
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Affiliation(s)
- Alberto Canfrán-Duque
- Servicio de Bioquímica-Investigación, Hospital Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
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