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Hao G, Conzen-Dilger C, Schmidt TP, Harder E, Schöps M, Clauser JC, Schubert GA, Lindauer U. Effect of isolated intracranial hypertension on cerebral perfusion within the phase of primary disturbances after subarachnoid hemorrhage in rats. Front Cell Neurosci 2023; 17:1115385. [PMID: 37502465 PMCID: PMC10368889 DOI: 10.3389/fncel.2023.1115385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 06/05/2023] [Indexed: 07/29/2023] Open
Abstract
Introduction Elevated intracranial pressure (ICP) and blood components are the main trigger factors starting the complex pathophysiological cascade following subarachnoid hemorrhage (SAH). It is not clear whether they independently contribute to tissue damage or whether their impact cannot be differentiated from each other. We here aimed to establish a rat intracranial hypertension model that allows distinguishing the effects of these two factors and investigating the relationship between elevated ICP and hypoperfusion very early after SAH. Methods Blood or four different types of fluids [gelofusine, silicone oil, artificial cerebrospinal fluid (aCSF), aCSF plus xanthan (CX)] were injected into the cisterna magna in anesthetized rats, respectively. Arterial blood pressure, ICP and cerebral blood flow (CBF) were continuously measured up to 6 h after injection. Enzyme-linked immunosorbent assays were performed to measure the pro-inflammatory cytokines interleukin 6 (IL-6) and tumor necrosis factor α (TNF-α) in brain cortex and peripheral blood. Results Silicone oil injection caused deaths of almost all animals. Compared to blood, gelofusine resulted in lower peak ICP and lower plateau phase. Artificial CSF reached a comparable ICP peak value but failed to reach the ICP plateau of blood injection. Injection of CX with comparable viscosity as blood reproduced the ICP course of the blood injection group. Compared with the CBF course after blood injection, CX induced a comparable early global ischemia within the first minutes which was followed by a prompt return to baseline level with no further hypoperfusion despite an equal ICP course. The inflammatory response within the tissue did not differ between blood or blood-substitute injection. The systemic inflammation was significantly more pronounced in the CX injection group compared with the other fluids including blood. Discussion By cisterna magna injection of blood substitution fluids, we established a subarachnoid space occupying rat model that exactly mimicked the course of ICP in the first 6 h following blood injection. Fluids lacking blood components did not induce the typical prolonged hypoperfusion occurring after blood-injection in this very early phase. Our study strongly suggests that blood components rather than elevated ICP play an important role for early hypoperfusion events in SAH.
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Affiliation(s)
- Guangshan Hao
- Translational Neurosurgery and Neurobiology, Department of Neurosurgery, Medical Faculty, RWTH Aachen University, Aachen, Germany
- Department of Neurosurgery, Liaocheng People’s Hospital, Liaocheng, Shandong, China
| | - Catharina Conzen-Dilger
- Translational Neurosurgery and Neurobiology, Department of Neurosurgery, Medical Faculty, RWTH Aachen University, Aachen, Germany
- Department of Neurosurgery, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Tobias Philip Schmidt
- Translational Neurosurgery and Neurobiology, Department of Neurosurgery, Medical Faculty, RWTH Aachen University, Aachen, Germany
- Department of Neurosurgery, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Ekaterina Harder
- Translational Neurosurgery and Neurobiology, Department of Neurosurgery, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Malte Schöps
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, University Hospital RWTH Aachen, Aachen, Germany
| | - Johanna Charlotte Clauser
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, University Hospital RWTH Aachen, Aachen, Germany
| | - Gerrit Alexander Schubert
- Department of Neurosurgery, Medical Faculty, RWTH Aachen University, Aachen, Germany
- Department of Neurosurgery, Kantonsspital Aarau, Aarau, Switzerland
| | - Ute Lindauer
- Translational Neurosurgery and Neurobiology, Department of Neurosurgery, Medical Faculty, RWTH Aachen University, Aachen, Germany
- Department of Neurosurgery, Medical Faculty, RWTH Aachen University, Aachen, Germany
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Chiocchetti GDME, Lopes-Aguiar L, Miyaguti NADS, Viana LR, Salgado CDM, Orvoën OO, Florindo D, dos Santos RW, Cintra Gomes-Marcondes MC. A Time-Course Comparison of Skeletal Muscle Metabolomic Alterations in Walker-256 Tumour-Bearing Rats at Different Stages of Life. Metabolites 2021; 11:metabo11060404. [PMID: 34202988 PMCID: PMC8234487 DOI: 10.3390/metabo11060404] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/16/2021] [Accepted: 06/17/2021] [Indexed: 12/23/2022] Open
Abstract
Cancer cachexia is a severe wasting condition that needs further study to find ways to minimise the effects of damage and poor prognosis. Skeletal muscle is the most impacted tissue in cancer cachexia; thus, elucidation of its metabolic alterations could provide a direct clue for biomarker research and be applied to detect this syndrome earlier. In addition, concerning the significant changes in the host metabolism across life, this study aimed to compare the metabolic muscle changes in cachectic tumour-bearing hosts at different ages. We performed 1H-NMR metabolomics in the gastrocnemius muscle in weanling and young adult Walker-256 tumour-bearing rats at different stages of tumour evolution (initial, intermediate, and advanced). Among the 49 metabolites identified, 24 were significantly affected throughout tumour evolution and 21 were significantly affected regarding animal age. The altered metabolites were mainly related to increased amino acid levels and changed energetic metabolism in the skeletal muscle, suggesting an expressive catabolic process and diverted energy production, especially in advanced tumour stages in both groups. Moreover, these changes were more severe in weanling hosts throughout tumour evolution, suggesting the distinct impact of cancer cachexia regarding the host's age, highlighting the need to adopting the right animal age when studying cancer cachexia.
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Affiliation(s)
- Gabriela de Matuoka e Chiocchetti
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Rua Monteiro Lobato, 255, Campinas 13083862, SP, Brazil; (L.L.-A.); (N.A.d.S.M.); (L.R.V.); (C.d.M.S.); (O.O.O.); (D.F.); (R.W.d.S.)
- Correspondence: (G.d.M.e.C.); (M.C.C.G.-M.); Tel.: +55-19-3521-6194 (M.C.C.G.-M.)
| | - Leisa Lopes-Aguiar
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Rua Monteiro Lobato, 255, Campinas 13083862, SP, Brazil; (L.L.-A.); (N.A.d.S.M.); (L.R.V.); (C.d.M.S.); (O.O.O.); (D.F.); (R.W.d.S.)
| | - Natália Angelo da Silva Miyaguti
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Rua Monteiro Lobato, 255, Campinas 13083862, SP, Brazil; (L.L.-A.); (N.A.d.S.M.); (L.R.V.); (C.d.M.S.); (O.O.O.); (D.F.); (R.W.d.S.)
| | - Lais Rosa Viana
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Rua Monteiro Lobato, 255, Campinas 13083862, SP, Brazil; (L.L.-A.); (N.A.d.S.M.); (L.R.V.); (C.d.M.S.); (O.O.O.); (D.F.); (R.W.d.S.)
| | - Carla de Moraes Salgado
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Rua Monteiro Lobato, 255, Campinas 13083862, SP, Brazil; (L.L.-A.); (N.A.d.S.M.); (L.R.V.); (C.d.M.S.); (O.O.O.); (D.F.); (R.W.d.S.)
| | - Ophelie Ocean Orvoën
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Rua Monteiro Lobato, 255, Campinas 13083862, SP, Brazil; (L.L.-A.); (N.A.d.S.M.); (L.R.V.); (C.d.M.S.); (O.O.O.); (D.F.); (R.W.d.S.)
- Biology Department, University of Angers, 49000 Anger, France
| | - Derly Florindo
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Rua Monteiro Lobato, 255, Campinas 13083862, SP, Brazil; (L.L.-A.); (N.A.d.S.M.); (L.R.V.); (C.d.M.S.); (O.O.O.); (D.F.); (R.W.d.S.)
| | - Rogério Williams dos Santos
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Rua Monteiro Lobato, 255, Campinas 13083862, SP, Brazil; (L.L.-A.); (N.A.d.S.M.); (L.R.V.); (C.d.M.S.); (O.O.O.); (D.F.); (R.W.d.S.)
| | - Maria Cristina Cintra Gomes-Marcondes
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Rua Monteiro Lobato, 255, Campinas 13083862, SP, Brazil; (L.L.-A.); (N.A.d.S.M.); (L.R.V.); (C.d.M.S.); (O.O.O.); (D.F.); (R.W.d.S.)
- Correspondence: (G.d.M.e.C.); (M.C.C.G.-M.); Tel.: +55-19-3521-6194 (M.C.C.G.-M.)
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