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Goth M, Grube M, Praetorius T, Kommoss S, Grimm J, Hoffmann S, Neis F, Tsaousidis C, Brucker SY, Krämer B, Andress J. Surgical treatment in a large single center cohort of patients with deep infiltrating endometriosis (DIE). Geburtshilfe Frauenheilkd 2018. [DOI: 10.1055/s-0038-1671096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Grube M, Goth M, Praetorius T, Andress J, Grimm J, Hoffmann S, Neis F, Tsaousidis C, Brucker SY, Krämer B, Kommoss S. Deep Infiltrating Endometriosis (DIE): Patient characteristics, medical history and indications for surgical treatment in a large single centre patient cohort. Geburtshilfe Frauenheilkd 2018. [DOI: 10.1055/s-0038-1671097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Joseph C, Rönnpagel V, Ullrich A, Runge D, Grube M. Drug transporter expression in non-parenchymal liver cells in comparison to hepatocytes. Toxicol Lett 2018. [DOI: 10.1016/j.toxlet.2018.06.643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Grube M, Scheidt-Nave C, Gaertner B, Koschollek C, Wetzstein M, Fuchs J. Indikatorenauswahl für ein Public Health Monitoring 65+. Ergebnisse des Projekts „Improving Health Monitoring in Old Age“ (IMOA). DAS GESUNDHEITSWESEN 2018. [DOI: 10.1055/s-0038-1667731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Koschollek C, Gaertner B, Grube M, Lüdtke D, Fuchs J, Wetzstein M, Gößwald A, Scheidt-Nave C. Können Pflegeheimbewohner/innen in Gesundheitssurveys integriert werden? Ergebnisse der Studie „Improving Health Monitoring in Old Age“ des Robert Koch-Instituts. DAS GESUNDHEITSWESEN 2018. [DOI: 10.1055/s-0038-1667724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Paul F, Kühne A, Grube M, Heck V, Hänel P. Prävention und Versorgung für den Kiez: Sozialraum- und Bedarfsanalyse für ein stadtteilorientiertes Gesundheitszentrum in Berlin-Neukölln. DAS GESUNDHEITSWESEN 2018. [DOI: 10.1055/s-0038-1667703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Gaertner B, Koschollek C, Lüdtke D, Grube M, Schmich P, Gößwald A, Scheidt-Nave C, Fuchs J, Wetzstein M. Effekte eines sequentiellen Mixed-Mode-Designs auf die Erhöhung der Teilnahmerate einer Gesundheitsbefragung 65+ Jähriger: Ergebnisse aus der Studie „Improving Health Monitoring in Old Age (IMOA)“ des Robert Koch-Instituts. DAS GESUNDHEITSWESEN 2018. [DOI: 10.1055/s-0038-1667732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ferreira C, Hagen P, Stern M, Hussner J, Zimmermann U, Grube M, Meyer zu Schwabedissen HE. The scaffold protein PDZK1 modulates expression and function of the organic anion transporting polypeptide 2B1. Eur J Pharm Sci 2018; 120:181-190. [DOI: 10.1016/j.ejps.2018.05.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 05/08/2018] [Indexed: 11/25/2022]
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Kalnina Z, Rubena E, Shvirksts K, Grube M. PO-224 Fourier transform infrared spectroscopy-based detection of hypoxia-induced biomolecular changes in different cancer cell lines. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Grube M, Hagen P, Jedlitschky G. Neurosteroid Transport in the Brain: Role of ABC and SLC Transporters. Front Pharmacol 2018; 9:354. [PMID: 29695968 PMCID: PMC5904994 DOI: 10.3389/fphar.2018.00354] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 03/27/2018] [Indexed: 12/17/2022] Open
Abstract
Neurosteroids, comprising pregnane, androstane, and sulfated steroids can alter neuronal excitability through interaction with ligand-gated ion channels and other receptors and have therefore a therapeutic potential in several brain disorders. They can be formed in brain cells or are synthesized by an endocrine gland and reach the brain by penetrating the blood–brain barrier (BBB). Especially sulfated steroids such as pregnenolone sulfate (PregS) and dehydroepiandrosterone sulfate (DHEAS) depend on transporter proteins to cross membranes. In this review, we discuss the involvement of ATP-binding cassette (ABC)- and solute carrier (SLC)-type membrane proteins in the transport of these compounds at the BBB and in the choroid plexus (CP), but also in the secretion from neurons and glial cells. Among the ABC transporters, especially BCRP (ABCG2) and several MRP/ABCC subfamily members (MRP1, MRP4, MRP8) are expressed in the brain and known to efflux conjugated steroids. Furthermore, several SLC transporters have been shown to mediate cellular uptake of steroid sulfates. These include members of the OATP/SLCO subfamily, namely OATP1A2 and OATP2B1, as well as OAT3 (SLC22A3), which have been reported to be expressed at the BBB, in the CP and in part in neurons. Furthermore, a role of the organic solute transporter OSTα-OSTβ (SLC51A/B) in brain DHEAS/PregS homeostasis has been proposed. This transporter was reported to be localized especially in steroidogenic cells of the cerebellum and hippocampus. To date, the impact of transporters on neurosteroid homeostasis is still poorly understood. Further insights are desirable also with regard to the therapeutic potential of these compounds.
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Bruckmann S, Brenn A, Grube M, Niedrig K, Holtfreter S, von Bohlen und Halbach O, Groschup M, Keller M, Vogelgesang S. Lack of P-glycoprotein Results in Impairment of Removal of Beta-Amyloid and Increased Intraparenchymal Cerebral Amyloid Angiopathy after Active Immunization in a Transgenic Mouse Model of Alzheimer's Disease. Curr Alzheimer Res 2018; 14:656-667. [PMID: 27915995 DOI: 10.2174/1567205013666161201201227] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 11/11/2016] [Accepted: 11/27/2016] [Indexed: 11/22/2022]
Abstract
BACKGROUND Immunization against beta-amyloid (Aβ) reduces cerebral Aβ deposits and improves cognitive capacities in transgenic mouse models, and thus has been considered a promising disease- modifying therapeutic approach for Alzheimer's disease (AD). Although clinical trials in AD patients have yielded evidence for clearance of parenchymal Aβ plaques, Aβ increases in blood vessels of treated patients. We hypothesize that an age-related decline in the mechanisms that clear Aβ from the brain might be at least in part responsible for the failure to purge and re-distribute Aβ. The expulsion of Aβ via the blood-brain barrier is mediated by specialized transport proteins such as P-glycoprotein (P-gp, ABCB1/MDR1). OBJECTIVE The objective of this study is to investigate the influence of the absence of P-gp at the bloodbrain barrier on the effectiveness of Aβ peptide immunization in APP/PS1+/- P-gp ko mice. METHODS Male APP/PS1+/- P-gp wt (n = 8) and APP/PS1+/- P-gp ko (n = 8) mice were actively immunized with human Aβ42. After behavioral testing animals were sacrificed at the age of 395 days (+/- 5 days) and antibody titres against Aβ were measured. Brains were dissected and soluble/insoluble cerebral Aβ was quantified, additionally the number of amyloid plaques and severity of amyloid angiopathy were evaluated. RESULTS In immunized mice with intact P-gp, our results showed a significant reduction of soluble and insoluble Aβ40 and Aβ42. Furthermore, immunization significantly reduced Aβ plaque burden. In contrast, immunized APP/PS1+/- P-gp ko mice lacking functional P-gp did not show a reduction of Aβ40 or Aβ42 accumulation in the brain except for the soluble form of Aβ42. Furthermore, after active immunization these mice displayed a stronger intracerebral amyloid angiopathy. CONCLUSION The results show that the absence of P-gp results in a significant disturbance of Aβ removal from the brain and increased intraparenchymal cerebral amyloid angiopathy after immunization against Aβ. Our data indicate that the selective up-regulation of P-gp could enhance the efficacy of Aβ immunization in the treatment or prevention of AD.
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Cope TE, Sohoglu E, Sedley W, Patterson K, Jones PS, Wiggins J, Dawson C, Grube M, Carlyon RP, Griffiths TD, Davis MH, Rowe JB. Evidence for causal top-down frontal contributions to predictive processes in speech perception. Nat Commun 2017; 8:2154. [PMID: 29255275 PMCID: PMC5735133 DOI: 10.1038/s41467-017-01958-7] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 10/27/2017] [Indexed: 11/09/2022] Open
Abstract
Perception relies on the integration of sensory information and prior expectations. Here we show that selective neurodegeneration of human frontal speech regions results in delayed reconciliation of predictions in temporal cortex. These temporal regions were not atrophic, displayed normal evoked magnetic and electrical power, and preserved neural sensitivity to manipulations of sensory detail. Frontal neurodegeneration does not prevent the perceptual effects of contextual information; instead, prior expectations are applied inflexibly. The precision of predictions correlates with beta power, in line with theoretical models of the neural instantiation of predictive coding. Fronto-temporal interactions are enhanced while participants reconcile prior predictions with degraded sensory signals. Excessively precise predictions can explain several challenging phenomena in frontal aphasias, including agrammatism and subjective difficulties with speech perception. This work demonstrates that higher-level frontal mechanisms for cognitive and behavioural flexibility make a causal functional contribution to the hierarchical generative models underlying speech perception.
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Berlin S, Wallstabe S, Scheuch E, Oswald S, Hasan M, Wegner D, Grube M, Venner M, Ullrich A, Siegmund W. Intestinal and hepatic contributions to the pharmacokinetic interaction between gamithromycin and rifampicin after single-dose and multiple-dose administration in healthy foals. Equine Vet J 2017; 50:525-531. [PMID: 29239016 DOI: 10.1111/evj.12796] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 12/02/2017] [Indexed: 11/28/2022]
Abstract
BACKGROUND Standard treatment of foals with severe abscessing lung infection caused by Rhodococcus equi using rifampicin and a macrolide antibiotic can be compromised by extensive inhibition and/or induction of drug metabolising enzymes (e.g. CYP3A4) and transport proteins (e.g. P-glycoprotein), as has been shown for rifampicin and clarithromycin. The combination of rifampicin with the new, poorly metabolised gamithromycin, a long-acting analogue of azithromycin and tulathromycin with lower pharmacokinetic interaction potential, might be a suitable alternative. OBJECTIVES To evaluate the pharmacokinetic interactions and pulmonary distribution of rifampicin and gamithromycin in healthy foals, and to investigate the cellular uptake of gamithromycin in vitro. STUDY DESIGN Controlled, four-period, consecutive, single-dose and multiple-dose study. METHODS Pharmacokinetics and lung distribution of rifampicin (10 mg/kg) and gamithromycin (6 mg/kg) were measured in nine healthy foals using LC-MS/MS. Enzyme induction was confirmed using the 4β-OH-cholesterol/cholesterol ratio. Affinity of gamithromycin to drug transport proteins was evaluated in vitro using equine hepatocytes and MDCKII-cells stably transfected with human OATP1B1, OATP1B3 and OATP2B1. RESULTS Rifampicin significantly (P<0.05) increased the plasma exposure of gamithromycin (16.2 ± 4.77 vs. 8.57 ± 3.10 μg × h/mL) by decreasing the total body clearance. Otherwise, gamithromycin significantly lowered plasma exposure of single- and multiple-dose rifampicin (83.8 ± 35.3 and 112 ± 43.1 vs. 164 ± 96.7 μg × h/mL) without a change in metabolic ratio and half-life. Gamithromycin was identified as an inhibitor of human OATP1B1, OATP1B3 and OATP2B1 and as a substrate of OATP2B1. In addition, it was extracted by equine hepatocytes via a mechanism which could be inhibited by rifampicin. MAIN LIMITATIONS Influence of gamithromycin on pulmonary distribution of rifampicin was not evaluated. CONCLUSION The plasma exposure of gamithromycin is significantly increased by co-administration of rifampicin which is most likely caused by inhibition of hepatic elimination.
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Rössel C, Billing M, Görls H, Festag G, Grube M, Bellstedt P, Nischang I, Schacher F. Synthesis and modification of poly(ethyl 2-(imidazol-1-yl)acrylate) (PEImA). POLYMER 2017. [DOI: 10.1016/j.polymer.2017.08.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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40
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Keiser M, Kaltheuner L, Wildberg C, Müller J, Grube M, Partecke LI, Heidecke CD, Oswald S. The Organic Anion–Transporting Peptide 2B1 Is Localized in the Basolateral Membrane of the Human Jejunum and Caco-2 Monolayers. J Pharm Sci 2017; 106:2657-2663. [DOI: 10.1016/j.xphs.2017.04.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 04/03/2017] [Accepted: 04/03/2017] [Indexed: 01/23/2023]
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Monzel JV, Budde T, Meyer Zu Schwabedissen HE, Schwebe M, Bien-Möller S, Lütjohann D, Kroemer HK, Jedlitschky G, Grube M. Doxorubicin enhances oxysterol levels resulting in a LXR-mediated upregulation of cardiac cholesterol transporters. Biochem Pharmacol 2017; 144:108-119. [PMID: 28807695 DOI: 10.1016/j.bcp.2017.08.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 08/09/2017] [Indexed: 12/20/2022]
Abstract
The anthracycline-mediated cardiotoxicity is still not completely understood. To examine the impact of cholesterol metabolism and transport in this context, cholesterol and oxysterol levels as well as the expression of the cholesterol transporters ABCA1 and ABCG1 were analyzed in doxorubicin-treated HL-1 murine cardiomyocytes as well as in mouse model for acute doxorubicin-induced cardiotoxicity. Doxorubicin-treated HL-1 cells exhibited enhanced cholesterol (153±20% of control), oxysterol (24S-hydroxycholesterol: 206±29% of control) and cholesterol precursor levels (lathosterol: 122±12% of control; desmosterol: 188±10% of control) indicating enhanced cholesterol synthesis. Moreover, abca1 and abcg1 were upregulated on mRNA, protein and functional level caused by a doxorubicin-mediated activation of the nuclear receptor LXR. In addition, the oxysterols not only induced the abca1 and abcg1 in HL-1 cells but also enhanced the expression of endothelin-1 and transforming growth factor-β, which have already been identified as important factors in doxorubicin-induced cardiotoxicity. These in vitro findings were verified in a murine model for acute doxorubicin-induced cardiotoxicity, demonstrating elevated cardiac (2.1±0.2vs. 3.6±1.0ng/mg) and systemic cholesterol levels (105.0±8.4vs. 130.0±4.3mg/dl), respectively, as well as enhanced oxysterol levels such as cardiac 24S-hydroxycholesterol (2.1±0.2vs. 3.6±1.0ng/mg). In line with these findings cardiac mRNA expression of abca1 (303% of control) and abcg1 (161% of control) was induced. Taken together, our data demonstrate enhanced cholesterol and oxysterol levels by doxorubicin, resulting in a LXR-dependent upregulation of abca1 and abcg1. In this context, the cytotoxic effects of oxysterols and their impact on cardiac gene expression should be considered as an important factor in doxorubicin-induced cardiotoxicity.
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Gaertner B, Fuchs J, Grube M, Martus P, Scheidt-Nave C. Akzeptanz und Auswirkungen des Hausbesuchsangebots auf die Zusammensetzung der Studienpopulation einer Gesundheitsstudie ab 65 Jahren. DAS GESUNDHEITSWESEN 2017. [DOI: 10.1055/s-0037-1605751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Buttmann-Schweiger N, Grube M, Zeeb H. Open Access publizieren in den Gesundheitswissenschaften. DAS GESUNDHEITSWESEN 2017. [DOI: 10.1055/s-0037-1605885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ameling S, Bhardwaj G, Hammer E, Beug D, Steil L, Reinke Y, Weitmann K, Grube M, Trimpert C, Klingel K, Kandolf R, Hoffmann W, Nauck M, Dörr M, Empen K, Felix SB, Völker U. Erratum to: Changes of myocardial gene expression and protein composition in patients with dilated cardiomyopathy after immunoadsorption with subsequent immunoglobulin substitution. Basic Res Cardiol 2017; 112:40. [PMID: 28730386 PMCID: PMC7609265 DOI: 10.1007/s00395-017-0627-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Berlin S, Randow T, Scheuch E, Grube M, Venner M, Siegmund W. Pharmacokinetics and pulmonary distribution of gamithromycin after intravenous administration in foals. J Vet Pharmacol Ther 2017; 40:406-410. [DOI: 10.1111/jvp.12402] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 02/14/2017] [Indexed: 01/29/2023]
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Berlin S, Kirschbaum A, Spieckermann L, Oswald S, Keiser M, Grube M, Venner M, Siegmund W. Pharmacological indices and pulmonary distribution of rifampicin after repeated oral administration in healthy foals. Equine Vet J 2017; 49:618-623. [DOI: 10.1111/evj.12662] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 01/04/2017] [Indexed: 12/20/2022]
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Schaletzki Y, Kromrey ML, Bröderdorf S, Hammer E, Grube M, Hagen P, Sucic S, Freissmuth M, Völker U, Greinacher A, Rauch BH, Kroemer HK, Jedlitschky G. Several adaptor proteins promote intracellular localisation of the transporter MRP4/ABCC4 in platelets and haematopoietic cells. Thromb Haemost 2016; 117:105-115. [PMID: 27761583 DOI: 10.1160/th16-01-0045] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 09/20/2016] [Indexed: 12/29/2022]
Abstract
The multidrug resistance protein 4 (MRP4/ABCC4) has been identified as an important transporter for signalling molecules including cyclic nucleotides and several lipid mediators in platelets and may thus represent a novel target to interfere with platelet function. Besides its localisation in the plasma membrane, MRP4 has been also detected in the membrane of dense granules in resting platelets. In polarised cells it is localised at the basolateral or apical plasma membrane. To date, the mechanism of MRP4 trafficking has not been elucidated; protein interactions may regulate both the localisation and function of this transporter. We approached this issue by searching for interacting proteins by in vitro binding assays, followed by immunoblotting and mass spectrometry, and by visualising their co-localisation in platelets and haematopoietic cells. We identified the PDZ domain containing scaffold proteins ezrin-binding protein 50 (EBP50/NHERF1), postsynaptic density protein 95 (PSD95), and sorting nexin 27 (SNX27), but also the adaptor protein complex 3 subunit β3A (AP3B1) and the heat shock protein HSP90 as putative interaction partners of MRP4. The knock-down of SNX27, PSD95, and AP3B1 by siRNA in megakaryoblastic leukaemia cells led to a redistribution of MRP4 from intracellular structures to the plasma membrane. Inhibition of HSP90 led to a diminished expression and retention of MRP4 in the endoplasmic reticulum. These results indicate that MRP4 localisation and function are regulated by multiple protein interactions. Changes in the adaptor proteins can hence lead to altered localisation and function of the transporter.
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Fuchs J, Gärtner B, Gößwald A, Grube M, Kamtsiuris P, Sassenroth D, Schmich P, Wetzstein M, Scheidt-Nave C. Gesund älter werden in Deutschland – Entwicklung eines Rahmenkonzepts zur Erweiterung des Indikatoren-gestützten Gesundheitsmonitorings in Deutschland für die Bevölkerung ab 65 Jahren am Robert Koch-Institut (RKI) – Projektbeschreibung und Netzwerkaufbau. DAS GESUNDHEITSWESEN 2016. [DOI: 10.1055/s-0036-1586576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Hubeny A, Keiser M, Oswald S, Jedlitschky G, Kroemer HK, Siegmund W, Grube M. Expression of Organic Anion Transporting Polypeptide 1A2 in Red Blood Cells and Its Potential Impact on Antimalarial Therapy. Drug Metab Dispos 2016; 44:1562-8. [DOI: 10.1124/dmd.116.069807] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 08/04/2016] [Indexed: 12/20/2022] Open
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50
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Ameling S, Bhardwaj G, Hammer E, Beug D, Steil L, Reinke Y, Weitmann K, Grube M, Trimpert C, Klingel K, Kandolf R, Hoffmann W, Nauck M, Dörr M, Empen K, Felix SB, Völker U. Changes of myocardial gene expression and protein composition in patients with dilated cardiomyopathy after immunoadsorption with subsequent immunoglobulin substitution. Basic Res Cardiol 2016; 111:53. [PMID: 27412778 PMCID: PMC7101709 DOI: 10.1007/s00395-016-0569-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 06/16/2016] [Indexed: 12/18/2022]
Abstract
Immunoadsorption with subsequent immunoglobulin substitution (IA/IgG) represents a therapeutic approach for patients with dilated cardiomyopathy (DCM). Here, we studied which molecular cardiac alterations are initiated after this treatment. Transcription profiling of endomyocardial biopsies with Affymetrix whole genome arrays was performed on 33 paired samples of DCM patients collected before and 6 months after IA/IgG. Therapy-related effects on myocardial protein levels were analysed by label-free proteome profiling for a subset of 23 DCM patients. Data were analysed regarding therapy-associated differences in gene expression and protein levels by comparing responders (defined by improvement of left ventricular ejection fraction ≥20 % relative and ≥5 % absolute) and non-responders. Responders to IA/IgG showed a decrease in serum N-terminal proBNP levels in comparison with baseline which was accompanied by a decreased expression of heart failure markers, such as angiotensin converting enzyme 2 or periostin. However, despite clinical improvement even in responders, IA/IgG did not trigger general inversion of DCM-associated molecular alterations in myocardial tissue. Transcriptome profiling revealed reduced gene expression for connective tissue growth factor, fibronectin, and collagen type I in responders. In contrast, in non-responders after IA/IgG, fibrosis-associated genes and proteins showed elevated levels, whereas values were reduced or maintained in responders. Thus, improvement of LV function after IA/IgG seems to be related to a reduced gene expression of heart failure markers and pro-fibrotic molecules as well as reduced fibrosis progression.
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