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Jiang-Xie LF, Drieu A, Bhasiin K, Quintero D, Smirnov I, Kipnis J. Neuronal dynamics direct cerebrospinal fluid perfusion and brain clearance. Nature 2024; 627:157-164. [PMID: 38418877 DOI: 10.1038/s41586-024-07108-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 01/23/2024] [Indexed: 03/02/2024]
Abstract
The accumulation of metabolic waste is a leading cause of numerous neurological disorders, yet we still have only limited knowledge of how the brain performs self-cleansing. Here we demonstrate that neural networks synchronize individual action potentials to create large-amplitude, rhythmic and self-perpetuating ionic waves in the interstitial fluid of the brain. These waves are a plausible mechanism to explain the correlated potentiation of the glymphatic flow1,2 through the brain parenchyma. Chemogenetic flattening of these high-energy ionic waves largely impeded cerebrospinal fluid infiltration into and clearance of molecules from the brain parenchyma. Notably, synthesized waves generated through transcranial optogenetic stimulation substantially potentiated cerebrospinal fluid-to-interstitial fluid perfusion. Our study demonstrates that neurons serve as master organizers for brain clearance. This fundamental principle introduces a new theoretical framework for the functioning of macroscopic brain waves.
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Affiliation(s)
- Li-Feng Jiang-Xie
- Brain Immunology and Glia (BIG) Center, Washington University in St Louis, St Louis, MO, USA.
- Department of Pathology and Immunology, School of Medicine, Washington University in St Louis, St Louis, MO, USA.
| | - Antoine Drieu
- Brain Immunology and Glia (BIG) Center, Washington University in St Louis, St Louis, MO, USA
- Department of Pathology and Immunology, School of Medicine, Washington University in St Louis, St Louis, MO, USA
| | - Kesshni Bhasiin
- Brain Immunology and Glia (BIG) Center, Washington University in St Louis, St Louis, MO, USA
- Department of Pathology and Immunology, School of Medicine, Washington University in St Louis, St Louis, MO, USA
| | - Daniel Quintero
- Brain Immunology and Glia (BIG) Center, Washington University in St Louis, St Louis, MO, USA
- Department of Pathology and Immunology, School of Medicine, Washington University in St Louis, St Louis, MO, USA
| | - Igor Smirnov
- Brain Immunology and Glia (BIG) Center, Washington University in St Louis, St Louis, MO, USA
- Department of Pathology and Immunology, School of Medicine, Washington University in St Louis, St Louis, MO, USA
| | - Jonathan Kipnis
- Brain Immunology and Glia (BIG) Center, Washington University in St Louis, St Louis, MO, USA.
- Department of Pathology and Immunology, School of Medicine, Washington University in St Louis, St Louis, MO, USA.
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2
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Cathomas F, Lin HY, Chan KL, Li L, Parise LF, Alvarez J, Durand-de Cuttoli R, Aubry AV, Muhareb S, Desland F, Shimo Y, Ramakrishnan A, Estill M, Ferrer-Pérez C, Parise EM, Wilk CM, Kaster MP, Wang J, Sowa A, Janssen WG, Costi S, Rahman A, Fernandez N, Campbell M, Swirski FK, Nestler EJ, Shen L, Merad M, Murrough JW, Russo SJ. Circulating myeloid-derived MMP8 in stress susceptibility and depression. Nature 2024; 626:1108-1115. [PMID: 38326622 PMCID: PMC10901735 DOI: 10.1038/s41586-023-07015-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 12/29/2023] [Indexed: 02/09/2024]
Abstract
Psychosocial stress has profound effects on the body, including the immune system and the brain1,2. Although a large number of pre-clinical and clinical studies have linked peripheral immune system alterations to stress-related disorders such as major depressive disorder (MDD)3, the underlying mechanisms are not well understood. Here we show that expression of a circulating myeloid cell-specific proteinase, matrix metalloproteinase 8 (MMP8), is increased in the serum of humans with MDD as well as in stress-susceptible mice following chronic social defeat stress (CSDS). In mice, we show that this increase leads to alterations in extracellular space and neurophysiological changes in the nucleus accumbens (NAc), as well as altered social behaviour. Using a combination of mass cytometry and single-cell RNA sequencing, we performed high-dimensional phenotyping of immune cells in circulation and in the brain and demonstrate that peripheral monocytes are strongly affected by stress. In stress-susceptible mice, both circulating monocytes and monocytes that traffic to the brain showed increased Mmp8 expression following chronic social defeat stress. We further demonstrate that circulating MMP8 directly infiltrates the NAc parenchyma and controls the ultrastructure of the extracellular space. Depleting MMP8 prevented stress-induced social avoidance behaviour and alterations in NAc neurophysiology and extracellular space. Collectively, these data establish a mechanism by which peripheral immune factors can affect central nervous system function and behaviour in the context of stress. Targeting specific peripheral immune cell-derived matrix metalloproteinases could constitute novel therapeutic targets for stress-related neuropsychiatric disorders.
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Affiliation(s)
- Flurin Cathomas
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Hsiao-Yun Lin
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Kenny L Chan
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Long Li
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Lyonna F Parise
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Johana Alvarez
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Romain Durand-de Cuttoli
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Antonio V Aubry
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Samer Muhareb
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Fiona Desland
- Department of Oncological Sciences, Marc and Jennifer Lipschultz Precision Immunology Institute, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Yusuke Shimo
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Aarthi Ramakrishnan
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Molly Estill
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Carmen Ferrer-Pérez
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Eric M Parise
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - C Matthias Wilk
- Department of Oncological Sciences, Marc and Jennifer Lipschultz Precision Immunology Institute, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Manuella P Kaster
- Department of Biochemistry, Federal University of Santa Catarina, Santa Catarina, Brazil
| | - Jun Wang
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Allison Sowa
- Microscopy CoRE and Advanced Bioimaging Center, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - William G Janssen
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Microscopy CoRE and Advanced Bioimaging Center, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Sara Costi
- Depression and Anxiety Center for Discovery and Treatment, Department of Psychiatry, Icahn School of Medicine of Mount Sinai, New York, NY, USA
| | - Adeeb Rahman
- Department of Oncological Sciences, Marc and Jennifer Lipschultz Precision Immunology Institute, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Nicolas Fernandez
- Department of Oncological Sciences, Marc and Jennifer Lipschultz Precision Immunology Institute, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Matthew Campbell
- Smurfit Institute of Genetics, Trinity College Dublin, Dublin, Ireland
| | - Filip K Swirski
- Cardiovascular Research Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Eric J Nestler
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Li Shen
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Miriam Merad
- Department of Oncological Sciences, Marc and Jennifer Lipschultz Precision Immunology Institute, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - James W Murrough
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Depression and Anxiety Center for Discovery and Treatment, Department of Psychiatry, Icahn School of Medicine of Mount Sinai, New York, NY, USA
| | - Scott J Russo
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
- Brain and Body Research Center of the Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
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3
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Rydenfelt K, Strand-Amundsen R, Horneland R, Hødnebø S, Kjøsen G, Pischke SE, Tønnessen TI, Haugaa H. Microdialysis and CO2 sensors detect pancreatic ischemia in a porcine model. PLoS One 2022; 17:e0262848. [PMID: 35143517 PMCID: PMC8830677 DOI: 10.1371/journal.pone.0262848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 01/06/2022] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Pancreatic transplantation is associated with a high rate of early postoperative graft thrombosis. If a thrombosis is detected in time, a potentially graft-saving intervention can be initiated. Current postoperative monitoring lacks tools for early detection of ischemia. The aim of this study was to investigate if microdialysis and tissue pCO2 sensors detect pancreatic ischemia and whether intraparenchymal and organ surface measurements are comparable. METHODS In 8 anaesthetized pigs, pairs of lactate monitoring microdialysis catheters and tissue pCO2 sensors were simultaneously inserted into the parenchyma and attached to the surface of the pancreas. Ischemia was induced by sequential arterial and venous occlusions of 45-minute duration, with two-hour reperfusion after each occlusion. Microdialysate was analyzed every 15 minutes. Tissue pCO2 was measured continuously. We investigated how surface and parenchymal measurements correlated and the capability of lactate and pCO2 to discriminate ischemic from non-ischemic periods. RESULTS Ischemia was successfully induced by arterial occlusion in 8 animals and by venous occlusion in 5. During all ischemic episodes, lactate increased with a fold change of 3.2-9.5 (range) in the parenchyma and 1.7-7.6 on the surface. Tissue pCO2 increased with a fold change of 1.6-3.5 in the parenchyma and 1.3-3.0 on the surface. Systemic lactate and pCO2 remained unchanged. The area under curve (AUC) for lactate was 0.97 (95% confidence interval (CI) 0.93-1.00) for parenchymal and 0.90 (0.83-0.97) for surface (p<0.001 for both). For pCO2 the AUC was 0.93 (0.89-0.96) for parenchymal and 0.85 (0.81-0.90) for surface (p<0.001 for both). The median correlation coefficients between parenchyma and surface were 0.90 (interquartile range (IQR) 0.77-0.95) for lactate and 0.93 (0.89-0.97) for pCO2. CONCLUSIONS Local organ monitoring with microdialysis and tissue pCO2 sensors detect pancreatic ischemia with adequate correlation between surface and parenchymal measurements. Both techniques and locations seem feasible for further development of clinical pancreas monitoring.
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Affiliation(s)
- Kristina Rydenfelt
- Division of Emergencies and Critical Care, Department of Anesthesiology, Oslo University Hospital, Oslo, Norway
- Institute of Clinical medicine, University of Oslo, Oslo, Norway
- * E-mail:
| | - Runar Strand-Amundsen
- Department of Clinical and Biomedical Engineering, Oslo University Hospital, Oslo, Norway
| | - Rune Horneland
- Department of Transplantation Medicine, Section of Transplantation Surgery, Oslo University Hospital, Oslo, Norway
| | - Stina Hødnebø
- Division of Emergencies and Critical Care, Department of Anesthesiology, Oslo University Hospital, Oslo, Norway
- Institute of Clinical medicine, University of Oslo, Oslo, Norway
| | - Gisle Kjøsen
- Institute of Clinical medicine, University of Oslo, Oslo, Norway
- Division of Emergencies and Critical Care, Department of Research & Development, Oslo University Hospital, Oslo, Norway
| | - Søren Erik Pischke
- Division of Emergencies and Critical Care, Department of Anesthesiology, Oslo University Hospital, Oslo, Norway
- Institute of Clinical medicine, University of Oslo, Oslo, Norway
- Department of Immunology, Oslo University Hospital, Oslo, Norway
| | - Tor Inge Tønnessen
- Division of Emergencies and Critical Care, Department of Anesthesiology, Oslo University Hospital, Oslo, Norway
- Institute of Clinical medicine, University of Oslo, Oslo, Norway
| | - Håkon Haugaa
- Division of Emergencies and Critical Care, Department of Anesthesiology, Oslo University Hospital, Oslo, Norway
- Lovisenberg Diaconal University College, Oslo, Norway
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Lopez-Lopez V, Garcia-Carrillo N, de Gea D, Oltra L, González-Bermúdez CA, Carbonell G, Brusadin R, Lopez-Conesa A, Robles-Campos R. Assessment of hepatic function, perfusion and parenchyma attenuation with indocyanine green, ultrasound and computed tomography in a healthy rat model: Preliminary determination of baseline parameters in a healthy liver. PLoS One 2021; 16:e0261447. [PMID: 34919595 PMCID: PMC8682902 DOI: 10.1371/journal.pone.0261447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 12/02/2021] [Indexed: 11/19/2022] Open
Abstract
Background Defining reference intervals in experimental animal models plays a crucial role in pre-clinical studies. The hepatic parameters in healthy animals provide useful information about type and extension of hepatic damage. However, in the majority of the cases, to obtain them require an invasive techniques. Our study combines these determinations with dynamic functional test and imaging techniques to implement a non-invasive protocol for liver evaluation. The aim of the study was to determine reference intervals for hepatic function, perfusion and parenchyma attenuation with analytical and biochemical blood parameters, indocyanine green, ultrasound and computed tomography in six healthy SD rats. Methods Six males healthy SD rats were followed for 4 weeks. To determine hepatic function, perfusion and parenchyma attenuation analytical and biochemical blood parameters, indocyanine green, ultrasound and computed tomography were studied. Results were expressed as Means ± standard error of mean (SEM). The significance of differences was calculated by using student t-test, p < 0.05 was considered statistically significant. Results Indocyanine green clearance 5 and 10 minutes after its injection was 80.12% and 96.59%, respectively. Approximate rate of decay during the first 5 minutes after injection was 38% per minute. Hepatic perfusion evaluation with the high-frequency ultrasound was related to cardiovascular hemodynamic and renal perfusion. Portal area, hepatic artery resistance index, hepatic artery and portal peak systolic velocity and average between hepatic artery and porta was 3.41 ± 0.62 mm2, 0.57 ± 0.04 mm2/s, 693.24±102.53 mm2/s, 150.72 ± 17.80 mm2/s and 4.82 ± 0.96 mm2/s, respectively. Heart rate, cardiac output, left renal artery diammetre and renal blood flow were 331.01 ± 22.22 bpm, 75.58 ± 8.72 mL/min, 0.88 ± 0.04 mm2 and 13.65 ± 1.95 mm2/s. CT-scan hepatic average volume for each rat were 21.08±3.32, 17.57±2.76, 14.87±2.83 and 13.67±2.45 cm3 with an average attenuation coefficient of 113.51±18.08, 129,19±7.18, 141,47±1.95 y 151,67±1.2 HU. Conclusion Indocyanine green and high-frequency ultrasound could be used in rats as a suitable marker of liver function. Computed tomography, through the study of raw data, help to characterize liver parenchyma, and could be a potential tool for early detection of liver parenchymal alterations and linear follow-up of patients. Further studies in rats with liver disease are necessary to verify the usefulness of these parameters.
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Affiliation(s)
- Victor Lopez-Lopez
- Department of Surgery, HBP Unit, Virgen de la Arrixaca University Clinical Hospital, University of Murcia, (IMIB-Arrixaca), Murcia, Spain
- * E-mail:
| | | | - Diego de Gea
- Faculty of Medicine, University of Murcia, (IMIB-Arrixaca), Murcia, Spain
| | - Lidia Oltra
- Department of Physiology, Faculty of Medicine, University of Murcia, (IMIB-Arrixaca), Murcia, Spain
| | | | - Guillermo Carbonell
- Department of Radiology, Virgen de la Arrixaca University Clinical Hospital, University of Murcia, (IMIB-Arrixaca), Murcia, Spain
| | - Roberto Brusadin
- Department of Surgery, HBP Unit, Virgen de la Arrixaca University Clinical Hospital, University of Murcia, (IMIB-Arrixaca), Murcia, Spain
| | - Asunción Lopez-Conesa
- Department of Surgery, HBP Unit, Virgen de la Arrixaca University Clinical Hospital, University of Murcia, (IMIB-Arrixaca), Murcia, Spain
| | - Ricardo Robles-Campos
- Department of Surgery, HBP Unit, Virgen de la Arrixaca University Clinical Hospital, University of Murcia, (IMIB-Arrixaca), Murcia, Spain
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Lee WJ, Tu SH, Cheng TC, Lin JH, Sheu MT, Kuo CC, Changou CA, Wu CH, Chang HW, Chang HL, Chen LC, Ho YS. Type-3 Hyaluronan Synthase Attenuates Tumor Cells Invasion in Human Mammary Parenchymal Tissues. Molecules 2021; 26:molecules26216548. [PMID: 34770956 PMCID: PMC8587416 DOI: 10.3390/molecules26216548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 10/22/2021] [Accepted: 10/26/2021] [Indexed: 12/24/2022] Open
Abstract
The microenvironment for tumor growth and developing metastasis should be essential. This study demonstrated that the hyaluronic acid synthase 3 (HAS3) protein and its enzymatic product hyaluronic acid (HA) encompassed in the subcutaneous extracellular matrix can attenuate the invasion of human breast tumor cells. Decreased HA levels in subcutaneous Has3-KO mouse tissues promoted orthotopic breast cancer (E0771) cell-derived allograft tumor growth. MDA-MB-231 cells premixed with higher concentration HA attenuate tumor growth in xenografted nude mice. Human patient-derived xenotransplantation (PDX) experiments found that HA selected the highly migratory breast cancer cells with CD44 expression accumulated in the tumor/stroma junction. In conclusion, HAS3 and HA were detected in the stroma breast tissues at a high level attenuates effects for induced breast cancer cell death, and inhibit the cancer cells invasion at the initial stage. However, the highly migratory cancer cells were resistant to the HA-mediated effects with unknown mechanisms.
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Affiliation(s)
- Wen-Jui Lee
- Ph.D. Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei 110, Taiwan;
- Ph.D. Program for Neural Regenerative Medicine, College of Medical Science and Technology, National Health Research Institutes, Miaoli County 350, Taiwan
| | - Shih-Hsin Tu
- Breast Medical Center, Taipei Medical University Hospital, Taipei 110, Taiwan;
- Taipei Cancer Center, Taipei Medical University, Taipei 110, Taiwan
- Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
| | - Tzu-Chun Cheng
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan;
| | - Juo-Han Lin
- Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University and Academia Sinica, Taipei 110, Taiwan;
| | - Ming-Thau Sheu
- Department of Pharmaceutical Sciences, Taipei Medical University, Taipei 110, Taiwan;
| | - Ching-Chuan Kuo
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 350, Taiwan;
| | - Chun A. Changou
- The PhD Program for Translational Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei 110, Taiwan;
- The PhD Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University and Academia Sinica, Taipei 110, Taiwan
- The Core Facility Center, Office of Research and Development, Taipei Medical University, Taipei 110, Taiwan
| | - Chih-Hsiung Wu
- Department of General Surgery, En Chu Kong Hospital, New Taipei City 110, Taiwan;
| | - Hui-Wen Chang
- Department of Laboratory Medicine, Taipei Medical University Hospital, Taipei 110, Taiwan;
| | - Hang-Lung Chang
- Department of General Surgery, En Chu Kong Hospital, New Taipei City 237, Taiwan;
| | - Li-Ching Chen
- Breast Medical Center, Taipei Medical University Hospital, Taipei 110, Taiwan;
- Taipei Cancer Center, Taipei Medical University, Taipei 110, Taiwan
- TMU Research Center of Cancer Translational Medicine, Taipei Medical University, Taipei 110, Taiwan
- Correspondence: (L.-C.C.); (Y.-S.H.)
| | - Yuan-Soon Ho
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan;
- Department of Laboratory Medicine, Taipei Medical University Hospital, Taipei 110, Taiwan;
- TMU Research Center of Cancer Translational Medicine, Taipei Medical University, Taipei 110, Taiwan
- Graduate Institute of Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei 110, Taiwan
- School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei 110, Taiwan
- Correspondence: (L.-C.C.); (Y.-S.H.)
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6
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Chen R, Brown HM, Cooks RG. Metabolic profiles of human brain parenchyma and glioma for rapid tissue diagnosis by targeted desorption electrospray ionization mass spectrometry. Anal Bioanal Chem 2021; 413:6213-6224. [PMID: 34373931 PMCID: PMC8522078 DOI: 10.1007/s00216-021-03593-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/23/2021] [Accepted: 07/30/2021] [Indexed: 12/19/2022]
Abstract
Desorption electrospray ionization mass spectrometry (DESI-MS) is well suited for intraoperative tissue analysis since it requires little sample preparation and offers rapid and sensitive molecular diagnostics. Currently, intraoperative assessment of the tumor cell percentage of glioma biopsies can be made by measuring a single metabolite, N-acetylaspartate (NAA). The inclusion of additional biomarkers will likely improve the accuracy when distinguishing brain parenchyma from glioma by DESI-MS. To explore this possibility, mass spectra were recorded for extracts from 32 unmodified human brain samples with known pathology. Statistical analysis of data obtained from full-scan and multiple reaction monitoring (MRM) profiles identified discriminatory metabolites, namely gamma-aminobutyric acid (GABA), creatine, glutamic acid, carnitine, and hexane-1,2,3,4,5,6-hexol (abbreviated as hexol), as well as the established biomarker NAA. Brain parenchyma was readily differentiated from glioma based on these metabolites as measured both in full-scan mass spectra and by the intensities of their characteristic MRM transitions. New DESI-MS methods (5 min acquisition using full scans and MS/MS), developed to measure ion abundance ratios among these metabolites, were tested using smears of 29 brain samples. Ion abundance ratios based on signals for GABA, creatine, carnitine, and hexol all had sensitivities > 90%, specificities > 80%, and accuracies > 85%. Prospectively, the implementation of diagnostic ion abundance ratios should strengthen the discriminatory power of individual biomarkers and enhance method robustness against signal fluctuations, resulting in an improved DESI-MS method of glioma diagnosis.
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Affiliation(s)
- Rong Chen
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN, 47907-2084, USA
| | - Hannah Marie Brown
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN, 47907-2084, USA
| | - R Graham Cooks
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN, 47907-2084, USA.
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7
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Roudnický P, Potěšil D, Zdráhal Z, Gelnar M, Kašný M. Laser capture microdissection in combination with mass spectrometry: Approach to characterization of tissue-specific proteomes of Eudiplozoon nipponicum (Monogenea, Polyopisthocotylea). PLoS One 2020; 15:e0231681. [PMID: 32555742 PMCID: PMC7299319 DOI: 10.1371/journal.pone.0231681] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 05/25/2020] [Indexed: 12/14/2022] Open
Abstract
Eudiplozoon nipponicum (Goto, 1891) is a hematophagous monogenean ectoparasite which inhabits the gills of the common carp (Cyprinus carpio). Heavy infestation can lead to anemia and in conjunction with secondary bacterial infections cause poor health and eventual death of the host. This study is based on an innovative approach to protein localization which has never been used in parasitology before. Using laser capture microdissection, we dissected particular areas of the parasite body without contaminating the samples by surrounding tissue and in combination with analysis by mass spectrometry obtained tissue-specific proteomes of tegument, intestine, and parenchyma of our model organism, E. nipponicum. We successfully verified the presence of certain functional proteins (e.g. cathepsin L) in tissues where their presence was expected (intestine) and confirmed that there were no traces of these proteins in other tissues (tegument and parenchyma). Additionally, we identified a total of 2,059 proteins, including 72 peptidases and 33 peptidase inhibitors. As expected, the greatest variety was found in the intestine and the lowest variety in the parenchyma. Our results are significant on two levels. Firstly, we demonstrated that one can localize all proteins in one analysis and without using laboratory animals (antibodies for immunolocalization of single proteins). Secondly, this study offers the first complex proteomic data on not only the E. nipponicum but within the whole class of Monogenea, which was from this point of view until recently neglected.
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Affiliation(s)
- Pavel Roudnický
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
- * E-mail:
| | - David Potěšil
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Zbyněk Zdráhal
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Milan Gelnar
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Martin Kašný
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
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8
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Cai L, Kirchleitner SV, Zhao D, Li M, Tonn JC, Glass R, Kälin RE. Glioblastoma Exhibits Inter-Individual Heterogeneity of TSPO and LAT1 Expression in Neoplastic and Parenchymal Cells. Int J Mol Sci 2020; 21:ijms21020612. [PMID: 31963507 PMCID: PMC7013601 DOI: 10.3390/ijms21020612] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 01/11/2020] [Accepted: 01/13/2020] [Indexed: 02/06/2023] Open
Abstract
Molecular imaging is essential for diagnosis and treatment planning for glioblastoma patients. Positron emission tomography (PET) with tracers for the detection of the solute carrier family 7 member 5 (SLC7A5; also known as the amino acid transporter light chain L system, LAT1) and for the mitochondrial translocator protein (TSPO) is successfully used to provide additional information on tumor volume and prognosis. The current approaches for TSPO-PET and the visualization of tracer ([18F] Fluoroethyltyrosine, FET) uptake by LAT1 (FET-PET) do not yet exploit the full diagnostic potential of these molecular imaging techniques. Therefore, we investigated the expression of TSPO and LAT1 in patient glioblastoma (GBM) samples, as well as in various GBM mouse models representing patient GBMs of different genetic subtypes. By immunohistochemistry, we found that TSPO and LAT1 are upregulated in human GBM samples compared to normal brain tissue. Next, we orthotopically implanted patient-derived GBM cells, as well as genetically engineered murine GBM cells, representing different genetic subtypes of the disease. To determine TSPO and LAT1 expression, we performed immunofluorescence staining. We found that both TSPO and LAT1 expression was increased in tumor regions of the implanted human or murine GBM cells when compared to the neighboring mouse brain tissue. While LAT1 was largely restricted to tumor cells, we found that TSPO was also expressed by microglia, tumor-associated macrophages, endothelial cells, and pericytes. The Cancer Genome Atlas (TCGA)-data analysis corroborates the upregulation of TSPO in a bigger cohort of GBM patient samples compared to tumor-free brain tissue. In addition, AIF1 (the gene encoding for the myeloid cell marker Iba1) was also upregulated in GBM compared to the control. Interestingly, TSPO, as well as AIF1, showed significantly different expression levels depending on the GBM genetic subtype, with the highest expression being exhibited in the mesenchymal subtype. High TSPO and AIF1 expression also correlated with a significant decrease in patient survival compared to low expression. In line with this finding, the expression levels for TSPO and AIF1 were also significantly higher in (isocitrate-dehydrogenase wild-type) IDHWT compared to IDH mutant (IDHMUT) GBM. LAT1 expression, on the other hand, was not different among the individual GBM subtypes. Therefore, we could conclude that FET- and TSPO-PET confer different information on pathological features based on different genetic GBM subtypes and may thus help in planning individualized strategies for brain tumor therapy in the future. A combination of TSPO-PET and FET-PET could be a promising way to visualize tumor-associated myeloid cells and select patients for treatment strategies targeting the myeloid compartment.
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Affiliation(s)
- Linzhi Cai
- Neurosurgical Research, Department of Neurosurgery, University Hospital, LMU Munich, 81377 Munich, Germany (S.V.K.)
| | - Sabrina V. Kirchleitner
- Neurosurgical Research, Department of Neurosurgery, University Hospital, LMU Munich, 81377 Munich, Germany (S.V.K.)
- Department of Neurosurgery, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Dongxu Zhao
- Neurosurgical Research, Department of Neurosurgery, University Hospital, LMU Munich, 81377 Munich, Germany (S.V.K.)
| | - Min Li
- Neurosurgical Research, Department of Neurosurgery, University Hospital, LMU Munich, 81377 Munich, Germany (S.V.K.)
| | - Jörg-Christian Tonn
- Department of Neurosurgery, University Hospital, LMU Munich, 81377 Munich, Germany
| | - Rainer Glass
- Neurosurgical Research, Department of Neurosurgery, University Hospital, LMU Munich, 81377 Munich, Germany (S.V.K.)
- German Cancer Consortium (DKTK), Partner Site Munich and German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
- Correspondence:
| | - Roland E. Kälin
- Neurosurgical Research, Department of Neurosurgery, University Hospital, LMU Munich, 81377 Munich, Germany (S.V.K.)
- Walter Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, 81377 Munich, Germany
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9
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Leary SC, Ralle M. Advances in visualization of copper in mammalian systems using X-ray fluorescence microscopy. Curr Opin Chem Biol 2020; 55:19-25. [PMID: 31911338 DOI: 10.1016/j.cbpa.2019.12.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 12/03/2019] [Accepted: 12/04/2019] [Indexed: 12/23/2022]
Abstract
Synchrotron-based X-ray fluorescence microscopy (XFM) has become an important imaging technique to investigate elemental concentrations and distributions in biological specimens. Advances in technology now permit imaging at resolutions rivaling that of electron microscopy, and researchers can now visualize elemental concentrations in subcellular organelles when using appropriate correlative methods. XFM is an especially valuable tool to determine the distribution of endogenous trace metals that are involved in neurodegenerative diseases. Here, we discuss the latest research on the unusual copper (Cu) storage vesicles that were originally identified in mouse brains and the involvement of Cu in Alzheimer's disease. Finally, we provide an outlook of how future improvements to XFM will drive current trace element research forward.
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Affiliation(s)
- Scot C Leary
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E5, Canada
| | - Martina Ralle
- Department of Molecular and Medical Genetics, Oregon Health & Science University, Portland, OR, United States.
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10
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Tomasella M, Petrussa E, Petruzzellis F, Nardini A, Casolo V. The Possible Role of Non-Structural Carbohydrates in the Regulation of Tree Hydraulics. Int J Mol Sci 2019; 21:E144. [PMID: 31878253 PMCID: PMC6981889 DOI: 10.3390/ijms21010144] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/13/2019] [Accepted: 12/22/2019] [Indexed: 12/29/2022] Open
Abstract
The xylem is a complex system that includes a network of dead conduits ensuring long-distance water transport in plants. Under ongoing climate changes, xylem embolism is a major and recurrent cause of drought-induced tree mortality. Non-structural carbohydrates (NSC) play key roles in plant responses to drought and frost stress, and several studies putatively suggest their involvement in the regulation of xylem water transport. However, a clear picture on the roles of NSCs in plant hydraulics has not been drawn to date. We summarize the current knowledge on the involvement of NSCs during embolism formation and subsequent hydraulic recovery. Under drought, sugars are generally accumulated in xylem parenchyma and in xylem sap. At drought-relief, xylem functionality is putatively restored in an osmotically driven process involving wood parenchyma, xylem sap and phloem compartments. By analyzing the published data on stem hydraulics and NSC contents under drought/frost stress and subsequent stress relief, we found that embolism build-up positively correlated to stem NSC depletion, and that the magnitude of post-stress hydraulic recovery positively correlated to consumption of soluble sugars. These findings suggest a close relationship between hydraulics and carbohydrate dynamics. We call for more experiments on hydraulic and NSC dynamics in controlled and field conditions.
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Affiliation(s)
- Martina Tomasella
- Department of Life Sciences, University of Trieste, 34127 Trieste, Italy; (F.P.); (A.N.)
| | - Elisa Petrussa
- Department of Agriculture, Food, Environmental and Animal Sciences, University of Udine, Via delle Scienze 91, 33100 Udine, Italy; (E.P.); (V.C.)
| | - Francesco Petruzzellis
- Department of Life Sciences, University of Trieste, 34127 Trieste, Italy; (F.P.); (A.N.)
| | - Andrea Nardini
- Department of Life Sciences, University of Trieste, 34127 Trieste, Italy; (F.P.); (A.N.)
| | - Valentino Casolo
- Department of Agriculture, Food, Environmental and Animal Sciences, University of Udine, Via delle Scienze 91, 33100 Udine, Italy; (E.P.); (V.C.)
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11
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Schulze RJ, Schott MB, Casey CA, Tuma PL, McNiven MA. The cell biology of the hepatocyte: A membrane trafficking machine. J Cell Biol 2019; 218:2096-2112. [PMID: 31201265 PMCID: PMC6605791 DOI: 10.1083/jcb.201903090] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 05/24/2019] [Accepted: 05/28/2019] [Indexed: 12/24/2022] Open
Abstract
The liver performs numerous vital functions, including the detoxification of blood before access to the brain while simultaneously secreting and internalizing scores of proteins and lipids to maintain appropriate blood chemistry. Furthermore, the liver also synthesizes and secretes bile to enable the digestion of food. These diverse attributes are all performed by hepatocytes, the parenchymal cells of the liver. As predicted, these cells possess a remarkably well-developed and complex membrane trafficking machinery that is dedicated to moving specific cargos to their correct cellular locations. Importantly, while most epithelial cells secrete nascent proteins directionally toward a single lumen, the hepatocyte secretes both proteins and bile concomitantly at its basolateral and apical domains, respectively. In this Beyond the Cell review, we will detail these central features of the hepatocyte and highlight how membrane transport processes play a key role in healthy liver function and how they are affected by disease.
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Affiliation(s)
- Ryan J Schulze
- Division of Gastroenterology and Hepatology, Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN
| | - Micah B Schott
- Division of Gastroenterology and Hepatology, Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN
| | - Carol A Casey
- Research Service, Department of Veterans Affairs, Nebraska-Western Iowa Health Care System, Omaha, NE
- Departments of Internal Medicine and Biochemistry & Molecular Biology, University of Nebraska Medical Center, Omaha, NE
| | | | - Mark A McNiven
- Division of Gastroenterology and Hepatology, Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN
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Santana FPR, Pinheiro NM, Bittencourt-Mernak MI, Perini A, Yoshizaki K, Macchione M, Saldiva PHN, Martins MA, Tibério IFLC, Prado MAM, Prado VF, Prado CM. Vesicular acetylcholine transport deficiency potentiates some inflammatory responses induced by diesel exhaust particles. Ecotoxicol Environ Saf 2019; 167:494-504. [PMID: 30368143 DOI: 10.1016/j.ecoenv.2018.10.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Revised: 09/30/2018] [Accepted: 10/02/2018] [Indexed: 06/08/2023]
Abstract
Endogenous acetylcholine (ACh), which depends of the levels of vesicular ACh transport (VAChT) to be released, is the central mediator of the cholinergic anti-inflammatory system. ACh controls the release of cytokine in different models of inflammation. Diesel exhaust particles (DEP) are one of the major environmental pollutants produced in large quantity by automotive engines in urban center. DEP bind the lung parenchyma and induce inflammation. We evaluated whether cholinergic dysfunction worsens DEP-induced lung inflammation. Male mice with decreased ACh release due to reduced expression of VAChT (VAChT-KD mice) were submitted to DEP exposure for 30 days (3 mg/mL of DEP, once a day, five days a week) or saline. Pulmonary function and inflammation as well as extracellular matrix fiber deposition were evaluated. Additionally, airway and nasal epithelial mucus production were quantified. We found that DEP instillation worsened lung function and increased lung inflammation. Higher levels of mononuclear cells were observed in the peripheral blood of both wild-type (WT) and VAChT-KD mice. Also, both wild-type (WT) and VAChT-KD mice showed an increase in macrophages in bronchoalveolar lavage fluid (BALF) as well as increased expression of IL-4, IL-6, IL-13, TNF-α, and NF-κB in lung cells. The collagen fiber content in alveolar septa was also increased in both genotypes. On the other hand, we observed that granulocytes were increased only in VAChT-KD peripheral blood. Likewise, increased BALF lymphocytes and neutrophils as well as increased elastic fibers in alveolar septa, airway neutral mucus, and nasal epithelia acid mucus were observed only in VAChT-KD mice. The cytokines IL-4 and TNF-α were also higher in VAChT-KD mice compared with WT mice. In conclusion, decreased ability to release ACh exacerbates some of the lung alterations induced by DEP in mice, suggesting that VAChT-KD animals are more vulnerable to the effects of DEP in the lung.
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Affiliation(s)
- Fernanda P R Santana
- Department of Medicine, School of Medicine, Universidade de São Paulo, Brazil; Department of Biological Science, Universidade Federal de São Paulo, Diadema, Brazil
| | - Nathalia M Pinheiro
- Department of Medicine, School of Medicine, Universidade de São Paulo, Brazil
| | | | - Adenir Perini
- Department of Medicine, School of Medicine, Universidade de São Paulo, Brazil
| | - Kelly Yoshizaki
- Department of Pathology, School of Medicine, Universidade de São Paulo, São Paulo, Brazil
| | - Mariângela Macchione
- Department of Pathology, School of Medicine, Universidade de São Paulo, São Paulo, Brazil
| | - Paulo H N Saldiva
- Department of Pathology, School of Medicine, Universidade de São Paulo, São Paulo, Brazil
| | - Milton A Martins
- Department of Medicine, School of Medicine, Universidade de São Paulo, Brazil
| | | | - Marco Antônio M Prado
- Department of Physiology & Pharmacology, University of Western Ontario, London, Canada; Department of Anatomy & Cell Biology, University of Western Ontario, London, Canada
| | - Vânia F Prado
- Department of Physiology & Pharmacology, University of Western Ontario, London, Canada; Department of Anatomy & Cell Biology, University of Western Ontario, London, Canada
| | - Carla M Prado
- Department of Medicine, School of Medicine, Universidade de São Paulo, Brazil; Department of Bioscience, Universidade Federal de São Paulo, Santos, Brazil.
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13
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Weiskirchen R, Tacke F. Relevance of Autophagy in Parenchymal and Non-Parenchymal Liver Cells for Health and Disease. Cells 2019; 8:E16. [PMID: 30609663 PMCID: PMC6357193 DOI: 10.3390/cells8010016] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 12/21/2018] [Accepted: 12/26/2018] [Indexed: 02/06/2023] Open
Abstract
Autophagy is a highly conserved intracellular process for the ordered degradation and recycling of cellular components in lysosomes. In the liver, parenchymal cells (i.e., mainly hepatocytes) utilize autophagy to provide amino acids, glucose, and free fatty acids as sources of energy and biosynthesis functions, but also for recycling and controlling organelles such as mitochondria. Non-parenchymal cells of the liver, including endothelial cells, macrophages (Kupffer cells), and hepatic stellate cells (HSC), also employ autophagy, either for maintaining cellular homeostasis (macrophages, endothelium) or for providing energy for their activation (stellate cells). In hepatocytes, autophagy contributes to essential homeostatic functions (e.g., gluconeogenesis, glycogenolysis, fatty acid oxidation), but is also implicated in diseases. For instance, storage disorders (alpha 1 antitrypsin deficiency, Wilson's disease), metabolic (non-alcoholic steatohepatitis, NASH), and toxic (alcohol) liver diseases may benefit from augmenting autophagy in hepatocytes. In hepatic fibrosis, autophagy has been implicated in the fibrogenic activation of HSC to collagen-producing myofibroblasts. In hepatocellular carcinoma (HCC), autophagy may contribute to tumor surveillance as well as invasiveness, indicating a dual and stage-dependent function in cancer. As many drugs directly or indirectly modulate autophagy, it is intriguing to investigate autophagy-targeting, possibly even cell type-directed strategies for the treatment of hereditary liver diseases, NASH, fibrosis, and HCC.
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Affiliation(s)
- Ralf Weiskirchen
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry, University Hospital RWTH Aachen, D-52074 Aachen, Germany.
| | - Frank Tacke
- Department of Medicine III, University Hospital RWTH Aachen, D-52074 Aachen, Germany.
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14
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Hladky SB, Barrand MA. Elimination of substances from the brain parenchyma: efflux via perivascular pathways and via the blood-brain barrier. Fluids Barriers CNS 2018; 15:30. [PMID: 30340614 PMCID: PMC6194691 DOI: 10.1186/s12987-018-0113-6] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 08/30/2018] [Indexed: 02/06/2023] Open
Abstract
This review considers efflux of substances from brain parenchyma quantified as values of clearances (CL, stated in µL g-1 min-1). Total clearance of a substance is the sum of clearance values for all available routes including perivascular pathways and the blood-brain barrier. Perivascular efflux contributes to the clearance of all water-soluble substances. Substances leaving via the perivascular routes may enter cerebrospinal fluid (CSF) or lymph. These routes are also involved in entry to the parenchyma from CSF. However, evidence demonstrating net fluid flow inwards along arteries and then outwards along veins (the glymphatic hypothesis) is still lacking. CLperivascular, that via perivascular routes, has been measured by following the fate of exogenously applied labelled tracer amounts of sucrose, inulin or serum albumin, which are not metabolized or eliminated across the blood-brain barrier. With these substances values of total CL ≅ 1 have been measured. Substances that are eliminated at least partly by other routes, i.e. across the blood-brain barrier, have higher total CL values. Substances crossing the blood-brain barrier may do so by passive, non-specific means with CLblood-brain barrier values ranging from < 0.01 for inulin to > 1000 for water and CO2. CLblood-brain barrier values for many small solutes are predictable from their oil/water partition and molecular weight. Transporters specific for glucose, lactate and many polar substrates facilitate efflux across the blood-brain barrier producing CLblood-brain barrier values > 50. The principal route for movement of Na+ and Cl- ions across the blood-brain barrier is probably paracellular through tight junctions between the brain endothelial cells producing CLblood-brain barrier values ~ 1. There are large fluxes of amino acids into and out of the brain across the blood-brain barrier but only small net fluxes have been observed suggesting substantial reuse of essential amino acids and α-ketoacids within the brain. Amyloid-β efflux, which is measurably faster than efflux of inulin, is primarily across the blood-brain barrier. Amyloid-β also leaves the brain parenchyma via perivascular efflux and this may be important as the route by which amyloid-β reaches arterial walls resulting in cerebral amyloid angiopathy.
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Affiliation(s)
- Stephen B. Hladky
- Department of Pharmacology, University of Cambridge, Cambridge, CB2 1PD UK
| | - Margery A. Barrand
- Department of Pharmacology, University of Cambridge, Cambridge, CB2 1PD UK
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Affiliation(s)
- Han-Rong Feng
- Department of Pharmacology & Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Chao Zhang
- Department of Pharmacology & Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Song-Min Ying
- Department of Pharmacology & Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
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16
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Anwar S, Hassan A. Physiological Uptake of F18-FDG in breast parenchyma. J PAK MED ASSOC 2018; 68:1278. [PMID: 30108404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Increased F18-FDG uptake is on PET-CT images should always be assessed carefully for physiological and pathological causes. Breast uptake may be focal or diffuse. Although propensity of tumours increase in focal uptake; diffuse involvement may be seen in lymphoma and some types of breast cancer. Frequently, diffuse breast uptake is non-pathologic due to infection, physiological uptake or lactation. We describe the case of a 27-years old female who underwent 18F FDGPET-CT scan for staging workup of diffuse large B-cell lymphoma (DLBCL). The scan demonstrated bilateral F18-FDG breast uptake, due to ongoing lactation.
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Affiliation(s)
- Sadia Anwar
- Department of Nuclear Medicine, Shaukat Khanum Memorial Cancer Hospital and Research Centre, Lahore, Pakistan
| | - Aamna Hassan
- Department of Nuclear Medicine, Shaukat Khanum Memorial Cancer Hospital and Research Centre, Lahore, Pakistan
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Albargothy NJ, Johnston DA, MacGregor-Sharp M, Weller RO, Verma A, Hawkes CA, Carare RO. Convective influx/glymphatic system: tracers injected into the CSF enter and leave the brain along separate periarterial basement membrane pathways. Acta Neuropathol 2018; 136:139-152. [PMID: 29754206 PMCID: PMC6015107 DOI: 10.1007/s00401-018-1862-7] [Citation(s) in RCA: 179] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 05/05/2018] [Accepted: 05/05/2018] [Indexed: 12/22/2022]
Abstract
Tracers injected into CSF pass into the brain alongside arteries and out again. This has been recently termed the “glymphatic system” that proposes tracers enter the brain along periarterial “spaces” and leave the brain along the walls of veins. The object of the present study is to test the hypothesis that: (1) tracers from the CSF enter the cerebral cortex along pial-glial basement membranes as there are no perivascular “spaces” around cortical arteries, (2) tracers leave the brain along smooth muscle cell basement membranes that form the Intramural Peri-Arterial Drainage (IPAD) pathways for the elimination of interstitial fluid and solutes from the brain. 2 μL of 100 μM soluble, fluorescent fixable amyloid β (Aβ) were injected into the CSF of the cisterna magna of 6–10 and 24–30 month-old male mice and their brains were examined 5 and 30 min later. At 5 min, immunocytochemistry and confocal microscopy revealed Aβ on the outer aspects of cortical arteries colocalized with α-2 laminin in the pial-glial basement membranes. At 30 min, Aβ was colocalised with collagen IV in smooth muscle cell basement membranes in the walls of cortical arteries corresponding to the IPAD pathways. No evidence for drainage along the walls of veins was found. Measurements of the depth of penetration of tracer were taken from 11 regions of the brain. Maximum depths of penetration of tracer into the brain were achieved in the pons and caudoputamen. Conclusions drawn from the present study are that tracers injected into the CSF enter and leave the brain along separate periarterial basement membrane pathways. The exit route is along IPAD pathways in which Aβ accumulates in cerebral amyloid angiopathy (CAA) in Alzheimer’s disease. Results from this study suggest that CSF may be a suitable route for delivery of therapies for neurological diseases, including CAA.
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Affiliation(s)
| | | | | | - Roy O Weller
- Faculty of Medicine, University of Southampton, Southampton, UK
| | | | | | - Roxana O Carare
- Faculty of Medicine, University of Southampton, Southampton, UK.
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18
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Abstract
Shear distortion of amyloid-beta (Aβ) solutions accelerates amyloid cascade reactions that may yield different toxic oligomers than those formed in quiescent solutions. Recent experiments indicate that cerebrospinal fluid (CSF) and interstitial fluid (ISF) containing Aβ flow through narrow brain perivascular pathways and brain parenchyma. This paper suggests that such flow causes shear distortion of Aβ molecules involving conformation changes that may be one of the initiating events in the etiology of Alzheimer’s disease. Aβ shearing can occur in or around brain arteries and arterioles and is suggested as the origin of cerebral amyloid angiopathy deposits in cerebrovascular walls. Comparatively low flow rates of ISF within the narrow extracellular spaces (ECS) of the brain parenchyma are suggested as a possible initiating factor in both the formation of neurotoxic Aβ42 oligomers and amyloid fibrils. Aβ42 in slow-flowing ISF can gain significant shear energy at or near the walls of tortuous brain ECS flow paths, promoting the formation of a shear-distorted, excited state hydrophobic Aβ42* conformation. This Aβ42* molecule could possibly be involved in one of two paths, one involving rapid adsorption to a brain membrane surface, ultimately forming neurotoxic oligomers on membranes, and the other ultimately forming plaque within the ECS flow pathways. Rising Aβ concentrations combined with shear at or near critical brain membranes are proposed as contributing factors to Alzheimer’s disease neurotoxicity. These hypotheses may be applicable in other neurodegenerative diseases, including tauopathies and alpha-synucleinopathies, in which shear-distorted proteins also may form in the brain ECS.
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Affiliation(s)
- Conrad N. Trumbore
- Correspondence to: Conrad N. Trumbore, 441 Crosslands Drive, Kennett Square, PA 19348, USA. Tel.: +1 610 388 7093; Fax: +1 610 388 5691; E-mail:
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Abstract
Current progress in neuroscience demonstrates that the brain is not an isolated organ and is influenced by the systemic environment and extracerebral processes within the body. In view of this new concept, blood and cerebrospinal fluid (CSF) are important body fluids linking extracerebral and intracerebral processes. For decades, substantial evidence has been accumulated indicating that CSF modulates brain states and influences behavior as well as cognition. This chapter provides an overview of how CSF directly modulates the function of different types of brain cells, such as neurons, neural stem cells, and CSF-contacting cells. Alterations in CSF content occur in most pathologic central nervous system (CNS) conditions. In a classic view, the function of CSF is to drain waste products and detrimental factors derived from diseased brain parenchyma. This chapter presents examples for how intra- and extracerebral pathologic processes lead to alterations in the CSF content. Current knowledge about how pathologically altered CSF influences the functionality of brain cells will be presented. Thereby, it becomes evident that CSF has more than a drainage function and has a causal role for the etiology and pathogenesis of different CNS diseases.
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Affiliation(s)
- Sebastian Illes
- Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
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20
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Fadzen CM, Wolfe JM, Cho CF, Chiocca EA, Lawler SE, Pentelute BL. Perfluoroarene-Based Peptide Macrocycles to Enhance Penetration Across the Blood-Brain Barrier. J Am Chem Soc 2017; 139:15628-15631. [PMID: 28992407 PMCID: PMC5818988 DOI: 10.1021/jacs.7b09790] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Here we describe the utility of peptide macrocyclization through perfluoroaryl-cysteine SNAr chemistry to improve the ability of peptides to cross the blood-brain barrier. Multiple macrocyclic analogues of the peptide transportan-10 were investigated that displayed increased uptake in two different cell lines and improved proteolytic stability. One of these analogues (M13) exhibited substantially increased delivery across a cellular spheroid model of the blood-brain barrier. Through ex vivo imaging of mouse brains, we demonstrated that this perfluoroarene-based macrocycle of TP10 exhibits increased penetration of the brain parenchyma following intravenous administration in mice. Finally, we evaluated macrocyclic analogues of the BH3 domain of the BIM protein to assess if our approach would be applicable to a peptide of therapeutic interest. We identified a BIM BH3 analogue that showed increased penetration of the brain tissue in mice.
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Affiliation(s)
- Colin M. Fadzen
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Justin M. Wolfe
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Choi-Fong Cho
- Harvey Cushing Neuro-Oncology Laboratories, Department of Neurosurgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - E. Antonio Chiocca
- Harvey Cushing Neuro-Oncology Laboratories, Department of Neurosurgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Sean E. Lawler
- Harvey Cushing Neuro-Oncology Laboratories, Department of Neurosurgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Bradley L. Pentelute
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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Popov SV, Guseinov RG, Martov AG, Muratov TM, Tabynbaev NB. [Molecular and cellular mechanisms of damage to renal parenchyma in renal warm ischemia]. Urologiia 2017:79-84. [PMID: 28952698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Warm ischemia of the renal parenchyma is a forced feature of laparoscopic partial nephrectomy. It is accompanied by oxygen deprivation of the organ and followed by re-oxygenation, which can cause additional damage to the renal tissue. This damage can result in acute functional and structural disorders of individual parts of the nephron, increasing the risk for a renal dysfunction. Timely diagnosis of the dysfunction is vital for the success of the treatment. The article provides an overview of current scientific data on the mechanisms of ischemic and reperfusion injuries at the molecular-cellular level and describes the current methods of their detection. Experimental and clinical study of the molecular-cellular mechanisms of ischemic-reperfusion injury of the renal tissue made it possible, first, to determine the main targets of alteration (cytolemma, mitochondria, lysosomes), and second, to establish its consequences, among which the most important are hypoergosis, DNA damage, simultaneous activation of intracellular systems of the suicidal program and induction of electrical breakdown of membranes of target nephrocytes; thirdly, to reveal the range of possibilities for limiting the consequences of hypoxia and/or re-oxygenation, among which interference in the metabolism of purines, measures ensuring the preservation of colloid osmotic pressure inside and outside the cell and membrane stabilization, antioxidant defense and inhibition of cysteine proteinases, etc. However, despite the advances in understanding the pathogenesis of cell damage, including ischemic-hypoxic injury, the problem of intraoperative ischemia-reperfusion safety remains relevant.
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Affiliation(s)
- S V Popov
- St. Lukes Clinical Hospital, St. Petersburg, Russia
- A.I. Burnazyan SSC Federal Medical Biophysical Center of FMBA of Russia, Moscow, Russia
- Akmolinsk Regional hospital 2, Astana, Kazakhstan
- Regional hospital 2, Astana, Kazakhstan, National Scientific Center for Oncology and Transplantation, Astana, Kazakhstan
| | - R G Guseinov
- St. Lukes Clinical Hospital, St. Petersburg, Russia
- A.I. Burnazyan SSC Federal Medical Biophysical Center of FMBA of Russia, Moscow, Russia
- Akmolinsk Regional hospital 2, Astana, Kazakhstan
- Regional hospital 2, Astana, Kazakhstan, National Scientific Center for Oncology and Transplantation, Astana, Kazakhstan
| | - A G Martov
- St. Lukes Clinical Hospital, St. Petersburg, Russia
- A.I. Burnazyan SSC Federal Medical Biophysical Center of FMBA of Russia, Moscow, Russia
- Akmolinsk Regional hospital 2, Astana, Kazakhstan
- Regional hospital 2, Astana, Kazakhstan, National Scientific Center for Oncology and Transplantation, Astana, Kazakhstan
| | - T M Muratov
- St. Lukes Clinical Hospital, St. Petersburg, Russia
- A.I. Burnazyan SSC Federal Medical Biophysical Center of FMBA of Russia, Moscow, Russia
- Akmolinsk Regional hospital 2, Astana, Kazakhstan
- Regional hospital 2, Astana, Kazakhstan, National Scientific Center for Oncology and Transplantation, Astana, Kazakhstan
| | - N B Tabynbaev
- St. Lukes Clinical Hospital, St. Petersburg, Russia
- A.I. Burnazyan SSC Federal Medical Biophysical Center of FMBA of Russia, Moscow, Russia
- Akmolinsk Regional hospital 2, Astana, Kazakhstan
- Regional hospital 2, Astana, Kazakhstan, National Scientific Center for Oncology and Transplantation, Astana, Kazakhstan
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Rosenzweig B, Rubinstein ND, Reznik E, Shingarev R, Juluru K, Akin O, Hsieh JJ, Jaimes EA, Russo P, Susztak K, Coleman JA, Hakimi AA. Benign and tumor parenchyma metabolomic profiles affect compensatory renal growth in renal cell carcinoma surgical patients. PLoS One 2017; 12:e0180350. [PMID: 28727768 PMCID: PMC5519040 DOI: 10.1371/journal.pone.0180350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 06/14/2017] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Pre-operative kidney volume is an independent predictor of glomerular filtration rate in renal cell carcinoma patients. Compensatory renal growth (CRG) can ensue prior to nephrectomy in parallel to tumor growth and benign parenchyma loss. We aimed to test whether renal metabolite abundances significantly associate with CRG, suggesting a causative relationship. DESIGN, SETTING, PARTICIPANTS, AND MEASUREMENTS Tissue metabolomics data from 49 patients, with a median age of 60 years, were previously collected and the pre-operative fold-change of their contra to ipsi-lateral benign kidney volume served as a surrogate for their CRG. Contra-lateral kidney volume fold-change within a 3.3 +/- 2.1 years follow-up interval was used as a surrogate for long-term CRG. Using a multivariable statistical model, we identified metabolites whose abundances significantly associate with CRG. RESULTS Our analysis found 13 metabolites in the benign (e.g. L-urobilin, Variable Influence in Projection, VIP, score = 3.02, adjusted p = 0.017) and 163 metabolites in the malignant (e.g. 3-indoxyl-sulfate, VIP score = 1.3, adjusted p = 0.044) tissues that significantly associate with CRG. Benign/tumor fold change in metabolite abundances revealed three additional metabolites with that significantly positively associate with CRG (e.g. p-cresol sulfate, VIP score = 2.945, adjusted p = 0.033). At the pathway level, we show that fatty-acid oxidation is highly enriched with metabolites whose benign tissue abundances strongly positively associate with CRG, both pre-operatively and long term, whereas in the tumor tissue significant enrichment of dipeptides and benzoate (positive association), glycolysis/gluconeogenesis, lysolipid and nucleotide sugar pentose (negative associations) sub-pathways, were observed. CONCLUSION These data suggest that specific biological processes in the benign as well as in the tumor parenchyma strongly influence compensatory renal growth.
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Affiliation(s)
- Barak Rosenzweig
- Urology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Nimrod D. Rubinstein
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts, United States of America
| | - Ed Reznik
- Computational and Systems Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Roman Shingarev
- Renal Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Krishna Juluru
- Body Imaging Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Oguz Akin
- Body Imaging Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - James J. Hsieh
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Edgar A. Jaimes
- Renal Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Paul Russo
- Urology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Katalin Susztak
- Renal Electrolyte and Hypertension Division, Department of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Jonathan A. Coleman
- Urology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
- * E-mail: (AAH); (JAC)
| | - A. Ari Hakimi
- Urology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
- * E-mail: (AAH); (JAC)
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23
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Nikan M, Osborn MF, Coles AH, Biscans A, Godinho BM, Haraszti RA, Sapp E, Echeverria D, DiFiglia M, Aronin N, Khvorova A. Synthesis and Evaluation of Parenchymal Retention and Efficacy of a Metabolically Stable O-Phosphocholine-N-docosahexaenoyl-l-serine siRNA Conjugate in Mouse Brain. Bioconjug Chem 2017; 28:1758-1766. [PMID: 28462988 PMCID: PMC5578421 DOI: 10.1021/acs.bioconjchem.7b00226] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Ligand-conjugated siRNAs have the potential to achieve targeted delivery and efficient silencing in neurons following local administration in the central nervous system (CNS). We recently described the activity and safety profile of a docosahexaenoic acid (DHA)-conjugated, hydrophobic siRNA (DHA-hsiRNA) targeting Huntingtin (Htt) mRNA in mouse brain. Here, we report the synthesis of an amide-modified, phosphocholine-containing DHA-hsiRNA conjugate (PC-DHA-hsiRNA), which closely resembles the endogenously esterified biological structure of DHA. We hypothesized that this modification may enhance neuronal delivery in vivo. We demonstrate that PC-DHA-hsiRNA silences Htt in mouse primary cortical neurons and astrocytes. After intrastriatal delivery, Htt-targeting PC-DHA-hsiRNA induces ∼80% mRNA silencing and 71% protein silencing after 1 week. However, PC-DHA-hsiRNA did not substantially outperform DHA-hsiRNA under the conditions tested. Moreover, at the highest locally administered dose (4 nmol, 50 μg), we observe evidence of PC-DHA-hsiRNA-mediated reactive astrogliosis. Lipophilic ligand conjugation enables siRNA delivery to neural tissues, but rational design of functional, nontoxic siRNA conjugates for CNS delivery remains challenging.
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Affiliation(s)
- Mehran Nikan
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Maire F. Osborn
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Andrew H. Coles
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Annabelle Biscans
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Bruno M.D.C. Godinho
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Reka A. Haraszti
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Ellen Sapp
- Department of Neurology, Mass General Institute for Neurodegenerative Disease, Charlestown, MA, USA
| | - Dimas Echeverria
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Marian DiFiglia
- Department of Neurology, Mass General Institute for Neurodegenerative Disease, Charlestown, MA, USA
| | - Neil Aronin
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Anastasia Khvorova
- RNA Therapeutics Institute, University of Massachusetts Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
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Jörger AK, Liu L, Fehlner K, Weisser T, Cheng Z, Lu M, Höchst B, Bolzer A, Wang B, Hartmann D, Assfalg V, Sunami Y, Schlitter AM, Friess H, Hüser N, Laschinger M. Impact of NKT Cells and LFA-1 on Liver Regeneration under Subseptic Conditions. PLoS One 2016; 11:e0168001. [PMID: 27977747 PMCID: PMC5158001 DOI: 10.1371/journal.pone.0168001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 11/23/2016] [Indexed: 01/13/2023] Open
Abstract
Background Activation of the immune system in terms of subseptic conditions during liver regeneration is of paramount clinical importance. However, little is known about molecular mechanisms and their mediators that control hepatocyte proliferation. We sought to determine the functional role of immune cells, especially NKT cells, in response to partial hepatectomy (PH), and to uncover the impact of the integrin lymphocyte function-associated antigen-1 (LFA-1) on liver regeneration in a subseptic setting. Methods Wild-type (WT) and LFA-1-/- mice underwent a 2/3 PH and low-dose lipopolysaccharid (LPS) application. Hepatocyte proliferation, immune cell infiltration, and cytokine profile in the liver parenchyma were determined. Results Low-dose LPS application after PH results in a significant delay of liver regeneration between 48h and 72h, which is associated with a reduced number of CD3+ cells within the regenerating liver. In absence of LFA-1, an impaired regenerative capacity was observed under low-dose LPS application. Analysis of different leukocyte subpopulations showed less CD3+NK1.1+ NKT cells in the liver parenchyma of LFA-1-/- mice after PH and LPS application compared to WT controls, while CD3-NK1.1+ NK cells markedly increased. Concordantly with this observation, lower levels of NKT cell related cytokines IL-12 and IL-23 were expressed in the regenerating liver of LFA-1-/- mice, while the expression of NK cell-associated CCL5 and IL-10 was increased compared to WT mice. Conclusion A subseptic situation negatively alters hepatocyte proliferation. Within this scenario, we suggest an important impact of NKT cells and postulate a critical function for LFA-1 during processes of liver regeneration.
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Affiliation(s)
- Ann-Kathrin Jörger
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Lei Liu
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Karin Fehlner
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Tanja Weisser
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Zhangjun Cheng
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Miao Lu
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Bastian Höchst
- Institute of Molecular Immunology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | | | - Baocai Wang
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Daniel Hartmann
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Volker Assfalg
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Yoshiaki Sunami
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | | | - Helmut Friess
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Norbert Hüser
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
- * E-mail:
| | - Melanie Laschinger
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
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25
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Tsagareli Z, Kvachadze T, Melikadze E, Metreveli L, Nikobadze E, Gogiashvili L. HURTLE CELLS IMMUNOHISTOCHEMICAL ACTIVITIES IN HASHIMOTO THYROIDITIS PARENCHYMA. Georgian Med News 2016:42-46. [PMID: 28009314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The present study was designed to evaluate the participation and utility of Hǘrtle cells morphological requirment and transformation under Hashimoto autoimmune thyroiditis versus Riedel´s struma. Several markers have been evaluated to detect induced activities of Hǘrtle cells. Study subject - specimens (tissue fragments) collected from TG surgery (thyroidectomy) for mollecular (receptor) diagnosis of Hǘrtle cells activities using routine histological and immunohistochemical samples. 89 cases were selected in Hashimoto thyroiditis diagnosis with Hǘrtle cells history (adenoma and adenomatous grouth of oncocytes). Markers as: TSH receptors, TTF-1, S-100 protein, also anti-TPO and anti-TG levels in blood plasm were detected. It was shown that solid cell claster-nests like agregation of oncocytes and adenomatous growth foci in parafollicular areas with anti-TPO and anti-TG antibodies levels arising while Riedel´s struma shown only large intra- and extra glandular inflammatory proliferative fibrosing process. Large positive expression of TTF-1 and S-100 protein and the negative reaction of TSH receptor factor suggest that Thyroid parenchyma disorganization and mollecular biological atypia with Hǘrtle cells are proceses due to hypothyreoidismus, as well as neuroectodermal cells prominent activities in 70% of Hashimoto cases.
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Affiliation(s)
- Z Tsagareli
- I. Javakhishvili Tbilisi State University, Alexandre Natishvili Institute of Morphology, Tbilisi, Georgia
| | - T Kvachadze
- I. Javakhishvili Tbilisi State University, Alexandre Natishvili Institute of Morphology, Tbilisi, Georgia
| | - E Melikadze
- I. Javakhishvili Tbilisi State University, Alexandre Natishvili Institute of Morphology, Tbilisi, Georgia
| | - L Metreveli
- I. Javakhishvili Tbilisi State University, Alexandre Natishvili Institute of Morphology, Tbilisi, Georgia
| | - E Nikobadze
- I. Javakhishvili Tbilisi State University, Alexandre Natishvili Institute of Morphology, Tbilisi, Georgia
| | - L Gogiashvili
- I. Javakhishvili Tbilisi State University, Alexandre Natishvili Institute of Morphology, Tbilisi, Georgia
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26
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Rauner G, Barash I. Enrichment for Repopulating Cells and Identification of Differentiation Markers in the Bovine Mammary Gland. J Mammary Gland Biol Neoplasia 2016; 21:41-9. [PMID: 26615610 DOI: 10.1007/s10911-015-9348-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 11/15/2015] [Indexed: 10/22/2022] Open
Abstract
Elucidating cell hierarchy in the mammary gland is fundamental for understanding the mechanisms governing its normal development and malignant transformation. There is relatively little information on cell hierarchy in the bovine mammary gland, despite its agricultural potential and relevance to breast cancer research. Challenges in bovine-to-mouse xenotransplantation and difficulties obtaining bovine-compatible antibodies hinder the study of mammary stem-cell dynamics in this species. In-vitro indications of distinct bovine mammary epithelial cell populations, sorted according to CD24 and CD49f expression, have been provided. Here, we successfully transplanted these bovine populations into the cleared fat pads of immunocompromised mice, providing in-vivo evidence for the multipotency and self-renewal capabilities of cells that are at the top of the cell hierarchy (termed mammary repopulating units). Additional outgrowths from transplantation, composed exclusively of myoepithelial cells, were indicative of unipotent basal stem cells or committed progenitors. Sorting luminal cells according to E-cadherin revealed three distinct populations: luminal progenitors, and early- and late-differentiating cells. Finally, miR-200c expression was negatively correlated with differentiation levels in both the luminal and basal branches of the bovine mammary cell hierarchy. Together, these experiments provide further evidence for the presence of a regenerative entity in the bovine mammary gland and for the multistage differentiation process within the luminal lineage.
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Affiliation(s)
- Gat Rauner
- Institute of Animal Science, ARO, The Volcani Center, Bet-Dagan, Israel
- The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Itamar Barash
- Institute of Animal Science, ARO, The Volcani Center, Bet-Dagan, Israel.
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27
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Abudeev SA, Popugaev KA, Kruglyakov NM, Belousova KA, Terekhov DA, Leushin KY, Aronov MS, Karpova OV, Zelenkov AV, Kiselev KV, Fedin AB, Zabelin MV, Samoylov AS. [HYPOTHERMIA INFLUENCES ON OXYGEN TENSION IN THE BRAIN PARENCHYMA IN PATIENTS WITH ANEURYSMAL SUBARACHNOID HEMORRHAGE]. Anesteziol Reanimatol 2016; 61:155-158. [PMID: 27468510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Aneurysmal subarachnoid hemorrhage is a serious medical and social problem. The main physiological mechanisms that determine secondary brain damage in this patients are intracranial hypertension, cerebral vasospasm, dysfunction of autoregulation mechanisms, violation of liquorodynamics and delayed cerebral ischemia. The multimodal neuromonitoring for prevention and timely correction ofsecondary brain injury factors has become routine practice in neuroICU. Measurement of oxygen tension in the brain parenchyma is one of neuromonitoring options. During the years of intensive use of this method in clinical practice the reasons for reducing the oxygen tension in the brain parenchyma were revealed, as well as developed and clinically validated algorithms for correction of such conditions. However, there are clinical situations that are difficult to interpret and even more difficult to make the right tactical and therapeutic solutions. We present the clinical observation of the patient with aneurysmal subarachnoid hemorrhage, who had dramatically reduced brain intraparenchymal oxygen pressure although prolonged hypothermia were used. Despite this, the outcome was favorable. The analysis allowed to assume that the reason for this decrease in oxygen tension in the brain parenchyma could be hypothermia itself
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