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Goterris-Cerisuelo R, Sanahuja-Irene S, Sánchez-Catalán MJ, Martínez-García F. Adjusting and validating a procedure for parenteral anaesthesia in neonatal mice. Lab Anim 2024; 58:209-218. [PMID: 38495026 DOI: 10.1177/00236772231219821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
For neonatal pups, parenteral anaesthesia is said to be not reliable as low doses induce no anaesthesia whereas high doses render high mortality rates. In this work we have adapted parenteral anaesthesia procedures approved for pups >7 days of age, to anaesthetize neonatal animals (postnatal days 3-4; P3-P4) for keeping them immobile for a long period. In our first experiment we analysed the behaviour of P3-P4 mouse pups for 70 min after intraperitoneal administration of low (37.5/3.75 mg/kg) or high (50/5) doses of a ketamine/xylazine anaesthetic mixture, both in the low range as compared with dosages employed in adults. Pups became immobile in ≈7 min and remained immobile for ≈45 min, irrespective of the age and dose of anaesthesia, younger pups (P3) being apparently more sensitive to the dosage. In the second experiment, we studied the response of P3 pups to mildly nociceptive stimulations, performed with a 4.0 g von Frey filament applied to the dorsal aspect of their paws. These stimuli elicited reaction in 100% of the cases in non-anaesthetized pups. The results indicate that the high dose significantly reduced responses as compared with the low dose of anaesthesia. With the low dose, <40% of the pups were unresponsive to nociceptive stimulation, whereas the high dose resulted in 50-60% of the animals not responding. Mortality was low irrespective of age or dose, suggesting that doses can be further increased if needed for invasive experimental procedures.
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Affiliation(s)
| | - Sandra Sanahuja-Irene
- Universitat Jaume I, UP Medicina, Facultat Ciències de la Salut, Castelló de la Plana, Spain
| | - María J Sánchez-Catalán
- Universitat Jaume I, UP Medicina, Facultat Ciències de la Salut, Castelló de la Plana, Spain
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2
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Watanabe M, Nikaido Y, Sasaki N. Validation of the anesthetic effect of a mixture of remimazolam, medetomidine, and butorphanol in three mouse strains. Exp Anim 2024; 73:223-232. [PMID: 38246607 DOI: 10.1538/expanim.23-0158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024] Open
Abstract
Proper administration of anesthesia is indispensable for the ethical treatment of lab animals in biomedical research. Therefore, selecting an effective anesthesia protocol is pivotal for the design and success of experiments. Hence, continuous development and refinement of anesthetic agents are imperative to improve research outcomes and elevate animal welfare. "Balanced anesthesia" involves using multiple drugs to optimize efficacy while minimizing side effects. The medetomidine, midazolam, and butorphanol, called MMB, and medetomidine, alfaxalone, and butorphanol, called MAB, are popular in Japan. However, the drawbacks of midazolam, including its extended recovery time, and the narrow safety margin of MAB, have prompted research for suitable alternatives. This study replaced midazolam in the MMB combination with remimazolam (RMZ), which is noted for its ultra-short half-life. The resulting combination, called MRB, was effective in providing a wider safety margin compared to MAB while maintaining an anesthesia depth equivalent level to that of MMB in mice. Notably, MRB consistently exhibited better recovery scores after antagonist administration in contrast to MMB. Furthermore, the re-sedation phenomenon observed with MMB was not observed with MRB. The rapid metabolism of RMZ enables reliable anesthesia induction, circumventing the complications linked to MAB. Overall, MRB excelled in providing extended surgical anesthesia and swift post-antagonist recovery. These results highlight the potential of RMZ for broader animal research applications.
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Affiliation(s)
- Masaki Watanabe
- Laboratory of Laboratory Animal Science and Medicine, School of Veterinary Medicine, Kitasato University, 35-1 Higashi-23, Towada, Aomori 034-8628, Japan
| | - Yuko Nikaido
- Laboratory of Laboratory Animal Science and Medicine, School of Veterinary Medicine, Kitasato University, 35-1 Higashi-23, Towada, Aomori 034-8628, Japan
| | - Nobuya Sasaki
- Laboratory of Laboratory Animal Science and Medicine, School of Veterinary Medicine, Kitasato University, 35-1 Higashi-23, Towada, Aomori 034-8628, Japan
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3
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Obert DP, Killing D, Happe T, Tamas P, Altunkaya A, Dragovic SZ, Kreuzer M, Schneider G, Fenzl T. Substance specific EEG patterns in mice undergoing slow anesthesia induction. BMC Anesthesiol 2024; 24:167. [PMID: 38702608 PMCID: PMC11067159 DOI: 10.1186/s12871-024-02552-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 04/26/2024] [Indexed: 05/06/2024] Open
Abstract
The exact mechanisms and the neural circuits involved in anesthesia induced unconsciousness are still not fully understood. To elucidate them valid animal models are necessary. Since the most commonly used species in neuroscience are mice, we established a murine model for commonly used anesthetics/sedatives and evaluated the epidural electroencephalographic (EEG) patterns during slow anesthesia induction and emergence. Forty-four mice underwent surgery in which we inserted a central venous catheter and implanted nine intracranial electrodes above the prefrontal, motor, sensory, and visual cortex. After at least one week of recovery, mice were anesthetized either by inhalational sevoflurane or intravenous propofol, ketamine, or dexmedetomidine. We evaluated the loss and return of righting reflex (LORR/RORR) and recorded the electrocorticogram. For spectral analysis we focused on the prefrontal and visual cortex. In addition to analyzing the power spectral density at specific time points we evaluated the changes in the spectral power distribution longitudinally. The median time to LORR after start anesthesia ranged from 1080 [1st quartile: 960; 3rd quartile: 1080]s under sevoflurane anesthesia to 1541 [1455; 1890]s with ketamine. Around LORR sevoflurane as well as propofol induced a decrease in the theta/alpha band and an increase in the beta/gamma band. Dexmedetomidine infusion resulted in a shift towards lower frequencies with an increase in the delta range. Ketamine induced stronger activity in the higher frequencies. Our results showed substance-specific changes in EEG patterns during slow anesthesia induction. These patterns were partially identical to previous observations in humans, but also included significant differences, especially in the low frequencies. Our study emphasizes strengths and limitations of murine models in neuroscience and provides an important basis for future studies investigating complex neurophysiological mechanisms.
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Affiliation(s)
- David P Obert
- School of Medicine and Health, Department of Anesthesiology and Intensive Care, Technical University of Munich, 81675, Munich, Germany
- Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts's General Hospital, Boston, MA, 02114, USA
- Harvard Medical School, Boston, MA, 02115, USA
| | - David Killing
- School of Medicine and Health, Department of Anesthesiology and Intensive Care, Technical University of Munich, 81675, Munich, Germany
| | - Tom Happe
- School of Medicine and Health, Department of Anesthesiology and Intensive Care, Technical University of Munich, 81675, Munich, Germany
| | - Philipp Tamas
- School of Medicine and Health, Department of Anesthesiology and Intensive Care, Technical University of Munich, 81675, Munich, Germany
| | - Alp Altunkaya
- School of Medicine and Health, Department of Anesthesiology and Intensive Care, Technical University of Munich, 81675, Munich, Germany
| | - Srdjan Z Dragovic
- School of Medicine and Health, Department of Anesthesiology and Intensive Care, Technical University of Munich, 81675, Munich, Germany
| | - Matthias Kreuzer
- School of Medicine and Health, Department of Anesthesiology and Intensive Care, Technical University of Munich, 81675, Munich, Germany
| | - Gerhard Schneider
- School of Medicine and Health, Department of Anesthesiology and Intensive Care, Technical University of Munich, 81675, Munich, Germany
| | - Thomas Fenzl
- School of Medicine and Health, Department of Anesthesiology and Intensive Care, Technical University of Munich, 81675, Munich, Germany.
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4
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Gaskill BN, Boykin C, Zuniga I, Maynard K, Scorrano F. Evaluation of Thermal Support during Anesthesia Induction on Body Temperature in C57BL/6 and Nude Mice. JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE : JAALAS 2024; 63:294-302. [PMID: 38503485 PMCID: PMC11193424 DOI: 10.30802/aalas-jaalas-23-000085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/02/2023] [Accepted: 02/05/2024] [Indexed: 03/21/2024]
Abstract
Heat supplementation during surgery is a common practice; however, thermal support is not commonly used during anesthesia induction. Mice lose body temperature quickly, and air movement can exacerbate this, potentially putting mice at a thermal deficit before surgery. Whether the method of warming during induction affects overall heat loss during anesthesia is unknown. We hypothesized that the method of heating would affect body temperature (Tb) during anesthesia induction, maintenance, recovery, and once placed back on the rack. Mice (C57BL/6NHsd-6M/6F [C57BL/6]; Hsd:Athymic Nude-Foxn1nu [Nude]; N = 24;12M/12F) were assigned to a treatment in a factorial design: thermal chamber (TC; ambient temperature [Ta] = 28.8°C); heating pad (HP; induction chamber placed on an electric heating pad;Ta = 28.4°C); and control (Ctrl; Ta = 21.6°C). During induction, one mouse at a time was anesthetized with isoflurane over a 3min period and then maintained under anesthesia for 10min on a hot water heating pad (33 °C). Then isoflurane was stopped and time to ambulation was recorded. Tb and activity were tracked in the home cage on the rack before and after anesthesia. During induction, Ctrl mice lost significantly more heat (-2.8 °C) than did TC (+0.2 °C) and HP mice (+0.1 °C) but TC and HP were not different. During anesthesia maintenance, Ctrl mice regained 1 °C, but their Tb was still lower than that of the treated groups. Nude mice consistently had a lower Tb than C57BL/6 mice, regardless of treatment or anesthesia phase. C57BL/6 Ctrl mice took longer to ambulate than either HP or TC mice, but the method of heating did not differentially affect Nude mice. In general, C57BL/6 as compared with Nude and females as compared with males were comparatively more active and had higher Tb during certain times of day, regardless of the heating methods. Overall, our findings support the provision of heat during anesthesia induction, regardless of method, to reduce overall Tb loss during a short anesthesia event.
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Affiliation(s)
| | | | - Israel Zuniga
- Novartis Biomedical Research, Inc., San Diego, California; and
| | - Kate Maynard
- Novartis Biomedical Research, Inc., San Diego, California; and
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5
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Kumar K, Fachet M, Hoeschen C. High-Spatial-Resolution Benchtop X-ray Fluorescence Imaging through Bragg-Diffraction-Based Focusing with Bent Mosaic Graphite Crystals: A Simulation Study. Int J Mol Sci 2024; 25:4733. [PMID: 38731956 PMCID: PMC11083219 DOI: 10.3390/ijms25094733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/18/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024] Open
Abstract
X-ray fluorescence imaging (XFI) can localize diagnostic or theranostic entities utilizing nanoparticle (NP)-based probes at high resolution in vivo, in vitro, and ex vivo. However, small-animal benchtop XFI systems demonstrating high spatial resolution (variable from sub-millimeter to millimeter range) in vivo are still limited to lighter elements (i.e., atomic number Z≤45). This study investigates the feasibility of focusing hard X-rays from solid-target tubes using ellipsoidal lens systems composed of mosaic graphite crystals with the aim of enabling high-resolution in vivo XFI applications with mid-Z (42≤Z≤64) elements. Monte Carlo simulations are performed to characterize the proposed focusing-optics concept and provide quantitative predictions of the XFI sensitivity, in silico tumor-bearing mice models loaded with palladium (Pd) and barium (Ba) NPs. Based on simulation results, the minimum detectable total mass of PdNPs per scan position is expected to be on the order of a few hundred nanograms under in vivo conform conditions. PdNP masses as low as 150 ng to 50 ng could be detectable with a resolution of 600 μm when imaging abdominal tumor lesions across a range of low-dose (0.8 μGy) to high-dose (8 μGy) exposure scenarios. The proposed focusing-optics concept presents a potential step toward realizing XFI with conventional X-ray tubes for high-resolution applications involving interesting NP formulations.
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Affiliation(s)
| | - Melanie Fachet
- Chair of Medical Systems Technology, Institute for Medical Technology, Faculty of Electrical Engineering and Information Technology, Otto von Guericke University Magdeburg, 39106 Magdeburg, Germany; (K.K.)
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6
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Ampudia-Mesias E, Cameron CS, Yoo E, Kelly M, Anderson SM, Manning R, Abrahante Lloréns JE, Moertel CL, Yim H, Odde DJ, Saydam N, Saydam O. The OTX2 Gene Induces Tumor Growth and Triggers Leptomeningeal Metastasis by Regulating the mTORC2 Signaling Pathway in Group 3 Medulloblastomas. Int J Mol Sci 2024; 25:4416. [PMID: 38674001 PMCID: PMC11050316 DOI: 10.3390/ijms25084416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 04/12/2024] [Accepted: 04/14/2024] [Indexed: 04/28/2024] Open
Abstract
Medulloblastoma (MB) encompasses diverse subgroups, and leptomeningeal disease/metastasis (LMD) plays a substantial role in associated fatalities. Despite extensive exploration of canonical genes in MB, the molecular mechanisms underlying LMD and the involvement of the orthodenticle homeobox 2 (OTX2) gene, a key driver in aggressive MB Group 3, remain insufficiently understood. Recognizing OTX2's pivotal role, we investigated its potential as a catalyst for aggressive cellular behaviors, including migration, invasion, and metastasis. OTX2 overexpression heightened cell growth, motility, and polarization in Group 3 MB cells. Orthotopic implantation of OTX2-overexpressing cells in mice led to reduced median survival, accompanied by the development of spinal cord and brain metastases. Mechanistically, OTX2 acted as a transcriptional activator of the Mechanistic Target of Rapamycin (mTOR) gene's promoter and the mTORC2 signaling pathway, correlating with upregulated downstream genes that orchestrate cell motility and migration. Knockdown of mTOR mRNA mitigated OTX2-mediated enhancements in cell motility and polarization. Analysis of human MB tumor samples (N = 952) revealed a positive correlation between OTX2 and mTOR mRNA expression, emphasizing the clinical significance of OTX2's role in the mTORC2 pathway. Our results reveal that OTX2 governs the mTORC2 signaling pathway, instigating LMD in Group 3 MBs and offering insights into potential therapeutic avenues through mTORC2 inhibition.
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Affiliation(s)
- Elisabet Ampudia-Mesias
- Division of Hematology and Oncology, Department of Pediatrics, Medical School, University of Minnesota, Minneapolis, MN 55454, USA; (E.A.-M.); (C.S.C.); or (E.Y.); (C.L.M.)
| | - Charles S. Cameron
- Division of Hematology and Oncology, Department of Pediatrics, Medical School, University of Minnesota, Minneapolis, MN 55454, USA; (E.A.-M.); (C.S.C.); or (E.Y.); (C.L.M.)
| | - Eunjae Yoo
- Division of Hematology and Oncology, Department of Pediatrics, Medical School, University of Minnesota, Minneapolis, MN 55454, USA; (E.A.-M.); (C.S.C.); or (E.Y.); (C.L.M.)
- Department of Pharmacy, Institute of Pharmaceutical Science and Technology, College of Pharmacy, Hanyang University, Ansan 15588, Gyeonggi-do, Republic of Korea;
| | - Marcus Kelly
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA; (M.K.); (S.M.A.); (R.M.); (D.J.O.)
| | - Sarah M. Anderson
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA; (M.K.); (S.M.A.); (R.M.); (D.J.O.)
| | - Riley Manning
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA; (M.K.); (S.M.A.); (R.M.); (D.J.O.)
| | | | - Christopher L. Moertel
- Division of Hematology and Oncology, Department of Pediatrics, Medical School, University of Minnesota, Minneapolis, MN 55454, USA; (E.A.-M.); (C.S.C.); or (E.Y.); (C.L.M.)
| | - Hyungshin Yim
- Department of Pharmacy, Institute of Pharmaceutical Science and Technology, College of Pharmacy, Hanyang University, Ansan 15588, Gyeonggi-do, Republic of Korea;
| | - David J. Odde
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA; (M.K.); (S.M.A.); (R.M.); (D.J.O.)
| | | | - Okay Saydam
- Division of Hematology and Oncology, Department of Pediatrics, Medical School, University of Minnesota, Minneapolis, MN 55454, USA; (E.A.-M.); (C.S.C.); or (E.Y.); (C.L.M.)
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7
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Schwartz K, Pacharinsak C. Mouse Anesthesia and Analgesia. Curr Protoc 2024; 4:e1006. [PMID: 38646951 DOI: 10.1002/cpz1.1006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Providing anesthesia and analgesia for mouse subjects is a common and critical practice in the laboratory setting. This practice is necessary for performing invasive procedures, achieving prolonged immobility for sensitive imaging modalities (magnetic resonance imaging, for instance), and providing intra- and post-procedural pain relief. In addition to facilitating the procedures performed by the investigator, the provision of anesthesia and analgesia is crucial for the preservation of animal welfare and for humane treatment of animals used in research. Furthermore, anesthesia and analgesia are important components of animal use protocols reviewed by Institutional Animal Care and Use Committees, requiring careful consideration and planning for the particular animal model. In this article, we provide technical guidance for the investigator, covering the provision of anesthesia by two routes (injectable and inhalant), guidelines for monitoring anesthesia, current techniques for recognition of pain, considerations for administering preventative analgesia, and considerations for post-operative care. © 2024 Wiley Periodicals LLC. Basic Protocol 1: Injectable anesthesia Basic Protocol 2: Inhalant anesthesia Basic Protocol 3: Assessing pain.
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Affiliation(s)
- Kenzie Schwartz
- Department of Comparative Medicine, Stanford University School of Medicine, Stanford, California
| | - Cholawat Pacharinsak
- Department of Comparative Medicine, Stanford University School of Medicine, Stanford, California
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8
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Kawakita F, Nakano F, Kanamaru H, Asada R, Suzuki H. Anti-Apoptotic Effects of AMPA Receptor Antagonist Perampanel in Early Brain Injury After Subarachnoid Hemorrhage in Mice. Transl Stroke Res 2024; 15:462-475. [PMID: 36757633 DOI: 10.1007/s12975-023-01138-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 01/12/2023] [Accepted: 02/05/2023] [Indexed: 02/10/2023]
Abstract
This study was aimed to investigate if acute neuronal apoptosis is induced by activation of AMPA (α-amino-3-hydroxy-5-methyl-4-isoxazole propionate) receptors (AMPARs) and inhibited by a clinically available selective AMPAR antagonist and antiepileptic drug perampanel (PER) in subarachnoid hemorrhage (SAH), and if the mechanisms include upregulation of an inflammation-related matricellular protein periostin. Sham-operated and endovascular perforation SAH mice randomly received an administration of 3 mg/kg PER or the vehicle intraperitoneally. Post-SAH neurological impairments and increased caspase-dependent neuronal apoptosis were associated with activation of AMPAR subunits GluA1 and GluA2, and upregulation of periostin and proinflammatory cytokines interleukins-1β and -6, all of which were suppressed by PER. PER also inhibited post-SAH convulsion-unrelated increases in the total spectral power on video electroencephalogram (EEG) monitoring. Intracerebroventricularly injected recombinant periostin blocked PER's anti-apoptotic effects on neurons. An intracerebroventricular injection of a selective agonist for GluA1 and GluA2 aggravated neurological impairment, neuronal apoptosis as well as periostin upregulation, but did not increase the EEG total spectral power after SAH. A higher dosage (10 mg/kg) of PER had even more anti-apoptotic effects compared with 3 mg/kg PER. Thus, this study first showed that AMPAR activation causes post-SAH neuronal apoptosis at least partly via periostin upregulation. A clinically available AMPAR antagonist PER appears to be neuroprotective against post-SAH early brain injury through the anti-inflammatory and anti-apoptotic effects, independent of the antiepileptic action, and deserves further study.
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Affiliation(s)
- Fumihiro Kawakita
- Department of Neurosurgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Mie , 514-8507, Tsu, Japan
| | - Fumi Nakano
- Department of Neurosurgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Mie , 514-8507, Tsu, Japan
| | - Hideki Kanamaru
- Department of Neurosurgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Mie , 514-8507, Tsu, Japan
| | - Reona Asada
- Department of Neurosurgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Mie , 514-8507, Tsu, Japan
| | - Hidenori Suzuki
- Department of Neurosurgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Mie , 514-8507, Tsu, Japan.
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9
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Hopper SE, Weiss D, Mikush N, Jiang B, Spronck B, Cavinato C, Humphrey JD, Figueroa CA. Central Artery Hemodynamics in Angiotensin II-Induced Hypertension and Effects of Anesthesia. Ann Biomed Eng 2024; 52:1051-1066. [PMID: 38383871 DOI: 10.1007/s10439-024-03440-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 12/30/2023] [Indexed: 02/23/2024]
Abstract
Systemic hypertension is a strong risk factor for cardiovascular, neurovascular, and renovascular diseases. Central artery stiffness is both an initiator and indicator of hypertension, thus revealing a critical relationship between the wall mechanics and hemodynamics. Mice have emerged as a critical animal model for studying effects of hypertension and much has been learned. Regardless of the specific mouse model, data on changes in cardiac function and hemodynamics are necessarily measured under anesthesia. Here, we present a new experimental-computational workflow to estimate awake cardiovascular conditions from anesthetized data, which was then used to quantify effects of chronic angiotensin II-induced hypertension relative to normotension in wild-type mice. We found that isoflurane anesthesia had a greater impact on depressing hemodynamics in angiotensin II-infused mice than in controls, which led to unexpected results when comparing anesthetized results between the two groups of mice. Through comparison of the awake simulations, however, in vivo relevant effects of angiotensin II-infusion on global and regional vascular structure, properties, and hemodynamics were found to be qualitatively consistent with expectations. Specifically, we found an increased in vivo vascular stiffness in the descending thoracic aorta and suprarenal abdominal aorta, leading to increases in pulse pressure in the distal aorta. These insights allow characterization of the impact of regionally varying vascular remodeling on hemodynamics and mouse-to-mouse variations due to induced hypertension.
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Affiliation(s)
- S E Hopper
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - D Weiss
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA
| | - N Mikush
- Translational Research Imaging Center, Yale School of Medicine, New Haven, CT, USA
| | - B Jiang
- Department of Thyroid and Vascular Surgery, 1st Hospital of China Medical University, Shen Yang, China
| | - B Spronck
- Department of Biomedical Engineering, Maastricht University, Maastricht, The Netherlands
| | - C Cavinato
- LMGC, Universite' Montpellier, CNRS, Montpellier, France
| | - J D Humphrey
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA.
| | - C A Figueroa
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
- Department of Surgery, University of Michigan, Ann Arbor, MI, USA
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10
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Joyce L, Wenninger A, Kreuzer M, García PS, Schneider G, Fenzl T. Electroencephalographic monitoring of anesthesia during surgical procedures in mice using a modified clinical monitoring system. J Clin Monit Comput 2024; 38:373-384. [PMID: 37462861 PMCID: PMC10995005 DOI: 10.1007/s10877-023-01052-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 06/20/2023] [Indexed: 04/06/2024]
Abstract
Monitoring brain activity and associated physiology during the administration of general anesthesia (GA) in mice is pivotal to guarantee postanesthetic health. Clinically, electroencephalogram (EEG) monitoring is a well-established method to guide GA. There are no established methods available for monitoring EEG in mice (Mus musculus) during surgery. In this study, a minimally invasive rodent intraoperative EEG monitoring system was implemented using subdermal needle electrodes and a modified EEG-based commercial patient monitor. EEG recordings were acquired at three different isoflurane concentrations revealing that surgical concentrations of isoflurane anesthesia predominantly contained burst suppression patterns in mice. EEG suppression ratios and suppression durations showed strong positive correlations with the isoflurane concentrations. The electroencephalographic indices provided by the monitor did not support online monitoring of the anesthetic status. The online available suppression duration in the raw EEG signals during isoflurane anesthesia is a straight forward and reliable marker to assure safe, adequate and reproducible anesthesia protocols.
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Affiliation(s)
- Leesa Joyce
- Department of Anesthesiology & Intensive Care, School of Medicine, Technical University of Munich, Munich, Germany
| | - Alissa Wenninger
- Department of Anesthesiology & Intensive Care, School of Medicine, Technical University of Munich, Munich, Germany
| | - Matthias Kreuzer
- Department of Anesthesiology & Intensive Care, School of Medicine, Technical University of Munich, Munich, Germany
| | - Paul S García
- Department of Anesthesiology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, 10032, USA
| | - Gerhard Schneider
- Department of Anesthesiology & Intensive Care, School of Medicine, Technical University of Munich, Munich, Germany
| | - Thomas Fenzl
- Department of Anesthesiology & Intensive Care, School of Medicine, Technical University of Munich, Munich, Germany.
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11
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Rinwa P, Eriksson M, Cotgreave I, Bäckberg M. 3R-Refinement principles: elevating rodent well-being and research quality. Lab Anim Res 2024; 40:11. [PMID: 38549171 PMCID: PMC10979584 DOI: 10.1186/s42826-024-00198-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/19/2024] [Accepted: 03/20/2024] [Indexed: 04/01/2024] Open
Abstract
This review article delves into the details of the 3R-Refinement principles as a vital framework for ethically sound rodent research laboratory. It highlights the core objective of the refinement protocol, namely, to enhance the well-being of laboratory animals while simultaneously improving the scientific validity of research outcomes. Through an exploration of key components of the refinement principles, the article outlines how these ethics should be implemented at various stages of animal experiments. It emphasizes the significance of enriched housing environments that reduce stress and encourage natural behaviors, non-restraint methods in handling and training, refined dosing and sampling techniques that prioritize animal comfort, the critical role of optimal pain management and the importance of regular animal welfare assessment in maintaining the rodents well-being. Additionally, the advantages of collaboration with animal care and ethics committees are also mentioned. The other half of the article explains the extensive benefits of the 3R-Refinement protocol such as heightened animal welfare, enhanced research quality, reduced variability, and positive feedback from researchers and animal care staff. Furthermore, it addresses avenues for promoting the adoption of the protocol, such as disseminating best practices, conducting training programs, and engaging with regulatory bodies. Overall, this article highlights the significance of 3R-Refinement protocol in aligning scientific advancement with ethical considerations along with shaping a more compassionate and responsible future for animal research.
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Affiliation(s)
- Puneet Rinwa
- Department of Chemical and Pharmaceutical Safety, Division of Bioeconomy and Health, RISE Research Institutes of Sweden, Forskargatan 18, Södertälje, 151 36, Sweden
| | - Marie Eriksson
- Department of Chemical and Pharmaceutical Safety, Division of Bioeconomy and Health, RISE Research Institutes of Sweden, Forskargatan 18, Södertälje, 151 36, Sweden
| | - Ian Cotgreave
- Department of Chemical and Pharmaceutical Safety, Division of Bioeconomy and Health, RISE Research Institutes of Sweden, Forskargatan 18, Södertälje, 151 36, Sweden
| | - Matilda Bäckberg
- Department of Chemical and Pharmaceutical Safety, Division of Bioeconomy and Health, RISE Research Institutes of Sweden, Forskargatan 18, Södertälje, 151 36, Sweden.
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12
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Ichise T, Ichise H, Shimizu Y. Development of a Mouse Experimental System for the In Vivo Characterization of Bioengineered Adipose-Derived Stromal Cells. Cells 2024; 13:582. [PMID: 38607021 PMCID: PMC11011746 DOI: 10.3390/cells13070582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 03/23/2024] [Accepted: 03/26/2024] [Indexed: 04/13/2024] Open
Abstract
Human adipose-derived stromal cells (ADSCs) are an important resource for cell-based therapies. However, the dynamics of ADSCs after transplantation and their mechanisms of action in recipients remain unclear. Herein, we generated genetically engineered mouse ADSCs to clarify their biodistribution and post-transplantation status and to analyze their role in recipient mesenchymal tissue modeling. Immortalized ADSCs (iADSCs) retained ADSC characteristics such as stromal marker gene expression and differentiation potential. iADSCs expressing a fluorescent reporter gene were seeded into biocompatible nonwoven fabric sheets and transplanted into the dorsal subcutaneous region of neonatal mice. Transplanted donor ADSCs were distributed as CD90-positive stromal cells on the sheets and survived 1 month after transplantation. Although accumulation of T lymphocytes or macrophages inside the sheet was not observed with or without donor cells, earlier migration and accumulation of recipient blood vascular endothelial cells (ECs) inside the sheet was observed in the presence of donor cells. Thus, our mouse model can help in studying the interplay between donor ADSCs and recipient cells over a 1-month period. This system may be of value for assessing and screening bioengineered ADSCs in vivo for optimal cell-based therapies.
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Affiliation(s)
- Taeko Ichise
- Department of Plastic and Reconstructive Surgery, University of the Ryukyus Hospital, 207 Uehara, Nishihara 903-0215, Japan
| | - Hirotake Ichise
- Institute for Animal Research, Faculty of Medicine, University of the Ryukyus, 207 Uehara, Nishihara 903-0215, Japan
| | - Yusuke Shimizu
- Department of Plastic and Reconstructive Surgery, University of the Ryukyus Hospital, 207 Uehara, Nishihara 903-0215, Japan
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, University of the Ryukyus, 207 Uehara, Nishihara 903-0215, Japan
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13
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Mori R, Miyoshi N, Fujino S, Mizushima T, Yukimoto R, Ogino T, Takahashi H, Uemura M, Doki Y, Eguchi H. Investigation of Expanded Human Adipose-derived Stem Cell Dosage and Timing for Improved Defecation Function. In Vivo 2024; 38:546-558. [PMID: 38418103 PMCID: PMC10905476 DOI: 10.21873/invivo.13473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/14/2023] [Accepted: 12/22/2023] [Indexed: 03/01/2024]
Abstract
BACKGROUND/AIM Although certain treatment options exist for intestinal incontinence, none are curative. Adipose-derived stem cells (ADSCs) have emerged as promising therapeutic agents, but most preclinical studies of their effectiveness for anal function have used autologous or allogeneic ADSCs. In this study, the effectiveness, timing of administration, and required dosage of human ADSCs were investigated for clinical application. MATERIALS AND METHODS A 10-mm balloon catheter was used to induce anal sphincter injury in immunodeficient mice in the following experimental groups (n=4 per group): ADSC (injected ADSCs after injury), PBS (injected phosphate-buffered saline after injury), and control (uninjured). The effects of different timing (immediately after injection and 30 days following injury) and number of human ADSCs administered was compared among groups based on defecation status and pathological evaluation. RESULTS In terms of defecation status, groups receiving ≥1×104 human ADSCs after injection showed improvement. Pathological images showed that compared to the PBS group, the thinnest part of the sphincter was thicker for animals that received ≥1×104 human ADSCs, and fibrosis of the sphincter was notable in those treated with 1×103 human ADSCs or PBS. Furthermore, defecation status was improved by administration of human ADSCs, not only immediately after injury, but also at 30 days following injury. CONCLUSION Human ADSC administration in a mouse model of anal sphincter injury was effective. Injection of ≥1×104 human ADSCs was the amount necessary to improve defecation status, an effect detected in both the acute and chronic phases.
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Affiliation(s)
- Ryota Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Norikatsu Miyoshi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan;
- Department of Innovative Oncology Research and Regenerative Medicine, Osaka International Cancer Institute, Osaka, Japan
| | - Shiki Fujino
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
- Central Clinical School, Monash University, Melbourne, Australia
| | - Tsunekazu Mizushima
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
- Department of Gastroenterological Surgery, Osaka Police Hospital, Osaka, Japan
| | - Ryohei Yukimoto
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Takayuki Ogino
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Hidekazu Takahashi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Mamoru Uemura
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Hidetoshi Eguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
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14
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Oh SS, Narver HL. Mouse and Rat Anesthesia and Analgesia. Curr Protoc 2024; 4:e995. [PMID: 38406895 PMCID: PMC10914332 DOI: 10.1002/cpz1.995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Anesthesia and analgesia play pivotal roles in ethically and humanely using animal models in research, especially concerning mice and rats. These rodent species, extensively utilized in scientific investigations due to their genetic resemblance to humans, serve as invaluable tools for studying diseases and testing treatments. Proper anesthesia and analgesia not only prioritize animal welfare but also heighten experimental validity by minimizing stress-induced physiological responses. Recent years have seen remarkable advancements in anesthesia for mice and rats. The focus has shifted away from the 'one size fits all' toward tailoring anesthesia protocols, considering factors like age, strain, and the nature of the experimental procedure. The use of inhalation agents such as isoflurane and sevoflurane is often preferred due to their rapid induction and recovery characteristics, allowing precise control over anesthesia depth. However, refinements in injectable anesthetic agents also provide researchers the flexibility to select suitable agents based on study requirements. Additionally, progress in analgesic techniques has led to effective pain management strategies for these rodents. Common analgesics such as nonsteroidal anti-inflammatory drugs (NSAIDs), opioids, and local anesthetics are administered to alleviate pain and discomfort. However, standard practice also involves continuous monitoring of animals' behavior and physiological parameters, ensuring timely adjustments in analgesic regimens for optimal pain relief without compromising experimental outcomes. By integrating tailored anesthesia and analgesia protocols into the experimental design, researchers uphold high animal welfare standards while obtaining reliable scientific data. This contributes significantly to advancing medical knowledge and therapeutic interventions with reproducible results. Published 2024. This article is a U.S. Government work and is in the public domain in the USA. Current Protocols published by Wiley Periodicals LLC. Basic Protocol 1: Injectable anesthesia for mouse and rat Basic Protocol 2: Inhalant anesthesia using isoflurane for mouse and rat Basic Protocol 3: Analgesia for mice and rats.
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Affiliation(s)
- Sang Su Oh
- Animal Health & Care Section (AHCS), NIH/NINDS, 35A Convent Dr. Bethesda, MD, 20892. 301-480-0284
| | - Heather L. Narver
- Animal Health & Care Section (AHCS), NIH/NINDS, 35A Convent Dr. Bethesda, MD, 20892, 301-402-1636
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15
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Schwartz K, Zhang M, Franco B, Jampachaisri K, Cotton RM, Huss MK, Fisher KM, Darian-Smith C, Sharp P, Pablo L, Pacharinsak C. Effects of atipamezole on selected physiologic parameters in cynomolgus macaques (Macaca fascicularis). J Med Primatol 2024; 53:e12682. [PMID: 37908039 DOI: 10.1111/jmp.12682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 10/09/2023] [Indexed: 11/02/2023]
Abstract
BACKGROUND Atipamezole, an α-2 adrenergic receptor antagonist, reverses the α-2 agonist anesthetic effects. There is a dearth of information on the physiological effects of these drugs in cynomolgus macaques (Macaca fascicularis). We assessed atipamezole's physiologic effects. We hypothesized atipamezole administration would alter anesthetic parameters. METHODS Five cynomolgus macaques were sedated with ketamine/dexmedetomidine intramuscularly, followed 45 min later with atipamezole (0.5 mg/kg). Anesthetic parameters (heart rate, blood pressure [systolic (SAP), diastolic (DAP), and mean (MAP) blood pressure], body temperature, respiratory rate, and %SpO2) were monitored prior to and every 10 min (through 60 min) post atipamezole injection. RESULTS While heart rate was significantly increased for 60 min; SAP, DAP, MAP, and temperature were significantly decreased at 10 min. CONCLUSIONS This study indicates subcutaneous atipamezole results in increased heart rate and transient blood pressure decrease. These findings are clinically important to ensure anesthetist awareness to properly support and treat patients as needed.
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Affiliation(s)
- K Schwartz
- Department of Comparative Medicine, Stanford University, Stanford, California, USA
| | - M Zhang
- Department of Comparative Medicine, Stanford University, Stanford, California, USA
| | - B Franco
- Department of Comparative Medicine, Stanford University, Stanford, California, USA
| | - K Jampachaisri
- Department of Mathematics, Naresuan University, Phitsanulok, Thailand
| | - R M Cotton
- Department of Comparative Medicine, Stanford University, Stanford, California, USA
| | - M K Huss
- Department of Comparative Medicine, Stanford University, Stanford, California, USA
| | - K M Fisher
- Department of Comparative Medicine, Stanford University, Stanford, California, USA
| | - C Darian-Smith
- Department of Comparative Medicine, Stanford University, Stanford, California, USA
| | - P Sharp
- University of California, Merced, California, USA
- Murdoch University, Murdoch, Western Australia, Australia
| | - L Pablo
- Department of Comparative, Diagnostic & Population Medicine, University of Florida College, Gainesville, Florida, USA
| | - C Pacharinsak
- Department of Comparative Medicine, Stanford University, Stanford, California, USA
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16
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Verghese G, Voroslakos M, Markovic S, Tal A, Dehkharghani S, Yaghmazadeh O, Alon L. Autonomous animal heating and cooling system for temperature-regulated magnetic resonance experiments. NMR IN BIOMEDICINE 2024; 37:e5046. [PMID: 37837254 PMCID: PMC10840815 DOI: 10.1002/nbm.5046] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 09/05/2023] [Accepted: 09/06/2023] [Indexed: 10/15/2023]
Abstract
Temperature is a hallmark parameter influencing almost all magnetic resonance properties (e.g., T1 , T2 , proton density, and diffusion). In the preclinical setting, temperature has a large influence on animal physiology (e.g., respiration rate, heart rate, metabolism, and oxidative stress) and needs to be carefully regulated, especially when the animal is under anesthesia and thermoregulation is disrupted. We present an open-source heating and cooling system capable of regulating the temperature of the animal. The system was designed using Peltier modules capable of heating or cooling a circulating water bath with active temperature feedback. Feedback was obtained using a commercial thermistor, placed in the animal rectum, and a proportional-integral-derivative controller was used to modulate the temperature. Its operation was demonstrated in a phantom as well as in mouse and rat animal models, where the standard deviation of the temperature of the animal upon convergence was less than a 10th of a degree. An application where brain temperature of a mouse was modulated was demonstrated using an invasive optical probe and noninvasive magnetic resonance spectroscopic thermometry measurements.
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Affiliation(s)
- George Verghese
- Center for Advanced Imaging Innovation and Research (CAIR), New York University School of Medicine, New York, NY, United States
- Center for Biomedical Imaging, New York University School of Medicine, New York, NY, United States
| | | | - Stefan Markovic
- Department of Chemical Physics, Weizmann Institute of Science, Rehovot, Israel
| | - Assaf Tal
- Department of Chemical Physics, Weizmann Institute of Science, Rehovot, Israel
| | - Seena Dehkharghani
- Center for Advanced Imaging Innovation and Research (CAIR), New York University School of Medicine, New York, NY, United States
- Center for Biomedical Imaging, New York University School of Medicine, New York, NY, United States
| | | | - Leeor Alon
- Center for Advanced Imaging Innovation and Research (CAIR), New York University School of Medicine, New York, NY, United States
- Center for Biomedical Imaging, New York University School of Medicine, New York, NY, United States
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17
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Hrncir HR, Bombin S, Goodloe B, Hogan CB, Jadi O, Gracz AD. Sox9 links biliary maturation to branching morphogenesis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.15.574730. [PMID: 38293117 PMCID: PMC10827067 DOI: 10.1101/2024.01.15.574730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Branching morphogenesis couples cellular differentiation with development of tissue architecture. Intrahepatic bile duct (IHBD) morphogenesis is initiated with biliary epithelial cell (BEC) specification and eventually forms a heterogeneous network of large ducts and small ductules. Here, we show that Sox9 is required for developmental establishment of small ductules. IHBDs emerge as a webbed structure by E15.5 and undergo morphological maturation through 2 weeks of age. Developmental knockout of Sox9 leads to decreased postnatal branching morphogenesis, manifesting as loss of ductules in adult livers. In the absence of Sox9, BECs fail to mature and exhibit elevated TGF-β signaling and Activin A. Activin A induces developmental gene expression and morphological defects in BEC organoids and represses ductule formation in postnatal livers. Our data demonstrate that adult IHBD morphology and BEC maturation is regulated by the Sox9-dependent formation of precursors to ductules during development, mediated in part by downregulation of Activin A.
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Affiliation(s)
- Hannah R Hrncir
- Department of Medicine, Division of Digestive Diseases, Emory University. Atlanta, GA USA
- Graduate Program in Biochemistry, Cell and Developmental Biology, Emory University
| | - Sergei Bombin
- Department of Medicine, Division of Digestive Diseases, Emory University. Atlanta, GA USA
| | - Brianna Goodloe
- Department of Medicine, Division of Digestive Diseases, Emory University. Atlanta, GA USA
| | - Connor B Hogan
- Department of Medicine, Division of Digestive Diseases, Emory University. Atlanta, GA USA
| | - Othmane Jadi
- School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC USA
| | - Adam D Gracz
- Department of Medicine, Division of Digestive Diseases, Emory University. Atlanta, GA USA
- Graduate Program in Biochemistry, Cell and Developmental Biology, Emory University
- Lead contact:
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18
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Liu X, Zhou M, Tan J, Ma L, Tang H, He G, Tao X, Guo L, Kang X, Tang K, Bian X. Inhibition of CX3CL1 by treadmill training prevents osteoclast-induced fibrocartilage complex resorption during TBI healing. Front Immunol 2024; 14:1295163. [PMID: 38283363 PMCID: PMC10811130 DOI: 10.3389/fimmu.2023.1295163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 12/21/2023] [Indexed: 01/30/2024] Open
Abstract
Introduction The healing of tendon-bone injuries is very difficult, often resulting in poor biomechanical performance and unsatisfactory functional recovery. The tendon-bone insertion has a complex four distinct layers structure, and previous studies have often focused on promoting the regeneration of the fibrocartilage layer, neglecting the role of its bone end repair in tendon-bone healing. This study focuses on the role of treadmill training in promoting bone regeneration at the tendon-bone insertion and its related mechanisms. Methods After establishing the tendon-bone insertion injury model, the effect of treadmill training on tendon-bone healing was verified by Micro CT and HE staining; then the effect of CX3CL1 on osteoclast differentiation was verified by TRAP staining and cell culture; and finally the functional recovery of the mice was verified by biomechanical testing and behavioral test. Results Treadmill training suppresses the secretion of CX3CL1 and inhibits the differentiation of local osteoclasts after tendon-bone injury, ultimately reducing osteolysis and promoting tendon bone healing. Discussion Our research has found the interaction between treadmill training and the CX3CL1-C3CR1 axis, providing a certain theoretical basis for rehabilitation training.
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Affiliation(s)
- Xiao Liu
- Department of Sports Medicine, Southwest Hospital, Army Medical University, Chongqing, China
| | - Mei Zhou
- Department of Sports Medicine, Southwest Hospital, Army Medical University, Chongqing, China
| | - Jindong Tan
- Department of Sports Medicine, Southwest Hospital, Army Medical University, Chongqing, China
| | - Lin Ma
- Department of Sports Medicine, Southwest Hospital, Army Medical University, Chongqing, China
| | - Hong Tang
- Department of Sports Medicine, Southwest Hospital, Army Medical University, Chongqing, China
| | - Gang He
- Department of Sports Medicine, Southwest Hospital, Army Medical University, Chongqing, China
| | - Xu Tao
- Department of Sports Medicine, Southwest Hospital, Army Medical University, Chongqing, China
| | - Lin Guo
- Department of Sports Medicine, Southwest Hospital, Army Medical University, Chongqing, China
| | - Xia Kang
- Pancreatic Injury and Repair Key Laboratory of Sichuan Province, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
| | - Kanglai Tang
- Department of Sports Medicine, Southwest Hospital, Army Medical University, Chongqing, China
| | - Xuting Bian
- Department of Sports Medicine, Southwest Hospital, Army Medical University, Chongqing, China
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19
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Ionescu ON, Franti E, Carbunaru V, Moldovan C, Dinulescu S, Ion M, Dragomir DC, Mihailescu CM, Lascar I, Oproiu AM, Neagu TP, Costea R, Dascalu M, Teleanu MD, Ionescu G, Teleanu R. System of Implantable Electrodes for Neural Signal Acquisition and Stimulation for Wirelessly Connected Forearm Prosthesis. BIOSENSORS 2024; 14:31. [PMID: 38248408 PMCID: PMC10813559 DOI: 10.3390/bios14010031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/31/2023] [Accepted: 01/02/2024] [Indexed: 01/23/2024]
Abstract
There is great interest in the development of prosthetic limbs capable of complex activities that are wirelessly connected to the patient's neural system. Although some progress has been achieved in this area, one of the main problems encountered is the selective acquisition of nerve impulses and the closing of the automation loop through the selective stimulation of the sensitive branches of the patient. Large-scale research and development have achieved so-called "cuff electrodes"; however, they present a big disadvantage: they are not selective. In this article, we present the progress made in the development of an implantable system of plug neural microelectrodes that relate to the biological nerve tissue and can be used for the selective acquisition of neuronal signals and for the stimulation of specific nerve fascicles. The developed plug electrodes are also advantageous due to their small thickness, as they do not trigger nerve inflammation. In addition, the results of the conducted tests on a sous scrofa subject are presented.
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Affiliation(s)
- Octavian Narcis Ionescu
- Faculty of Mechanical and Electrical Engineering, Petroleum and Gas University from Ploiesti, 100680 Ploiesti, Romania; (O.N.I.); (G.I.)
- National Institute for Research and Development for Microtechnology Bucharest, 077190 Bucharest, Romania; (C.M.); (S.D.); (M.I.); (D.C.D.); (C.M.M.)
| | - Eduard Franti
- National Institute for Research and Development for Microtechnology Bucharest, 077190 Bucharest, Romania; (C.M.); (S.D.); (M.I.); (D.C.D.); (C.M.M.)
- ICIA, Centre of New Electronic Architectures, 061071 Bucharest, Romania;
| | - Vlad Carbunaru
- Emergency Clinic Hospital Bucharest, 014461 Bucharest, Romania; (V.C.); (I.L.); (A.M.O.); (T.P.N.)
- University of Medicine and Pharmacy UMF Carol Davila, 050474 Bucharest, Romania; (M.D.T.); (R.T.)
| | - Carmen Moldovan
- National Institute for Research and Development for Microtechnology Bucharest, 077190 Bucharest, Romania; (C.M.); (S.D.); (M.I.); (D.C.D.); (C.M.M.)
| | - Silviu Dinulescu
- National Institute for Research and Development for Microtechnology Bucharest, 077190 Bucharest, Romania; (C.M.); (S.D.); (M.I.); (D.C.D.); (C.M.M.)
| | - Marian Ion
- National Institute for Research and Development for Microtechnology Bucharest, 077190 Bucharest, Romania; (C.M.); (S.D.); (M.I.); (D.C.D.); (C.M.M.)
| | - David Catalin Dragomir
- National Institute for Research and Development for Microtechnology Bucharest, 077190 Bucharest, Romania; (C.M.); (S.D.); (M.I.); (D.C.D.); (C.M.M.)
| | - Carmen Marinela Mihailescu
- National Institute for Research and Development for Microtechnology Bucharest, 077190 Bucharest, Romania; (C.M.); (S.D.); (M.I.); (D.C.D.); (C.M.M.)
| | - Ioan Lascar
- Emergency Clinic Hospital Bucharest, 014461 Bucharest, Romania; (V.C.); (I.L.); (A.M.O.); (T.P.N.)
- University of Medicine and Pharmacy UMF Carol Davila, 050474 Bucharest, Romania; (M.D.T.); (R.T.)
| | - Ana Maria Oproiu
- Emergency Clinic Hospital Bucharest, 014461 Bucharest, Romania; (V.C.); (I.L.); (A.M.O.); (T.P.N.)
- University of Medicine and Pharmacy UMF Carol Davila, 050474 Bucharest, Romania; (M.D.T.); (R.T.)
| | - Tiberiu Paul Neagu
- Emergency Clinic Hospital Bucharest, 014461 Bucharest, Romania; (V.C.); (I.L.); (A.M.O.); (T.P.N.)
- University of Medicine and Pharmacy UMF Carol Davila, 050474 Bucharest, Romania; (M.D.T.); (R.T.)
| | - Ruxandra Costea
- Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine of Bucharest, 011464 Bucharest, Romania;
| | - Monica Dascalu
- ICIA, Centre of New Electronic Architectures, 061071 Bucharest, Romania;
- Faculty of Electronics, Telecommunications and Information Technology, National University of Science and Technology Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Mihai Daniel Teleanu
- University of Medicine and Pharmacy UMF Carol Davila, 050474 Bucharest, Romania; (M.D.T.); (R.T.)
| | - Gabriela Ionescu
- Faculty of Mechanical and Electrical Engineering, Petroleum and Gas University from Ploiesti, 100680 Ploiesti, Romania; (O.N.I.); (G.I.)
| | - Raluca Teleanu
- University of Medicine and Pharmacy UMF Carol Davila, 050474 Bucharest, Romania; (M.D.T.); (R.T.)
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20
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Thinphovong C, Nordstrom-Schuler E, Soisook P, Kritiyakan A, Chakngean R, Prapruti S, Tanita M, Paladsing Y, Makaew P, Pimsai A, Samoh A, Mahuzier C, Morand S, Chaisiri K, Phimpraphai W. A protocol and a data-based prediction to investigate virus spillover at the wildlife interface in human-dominated and protected habitats in Thailand: The Spillover Interface project. PLoS One 2024; 19:e0294397. [PMID: 38166047 PMCID: PMC10760853 DOI: 10.1371/journal.pone.0294397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 10/27/2023] [Indexed: 01/04/2024] Open
Abstract
The Spillover Interface Project aims at assessing the encounter of wildlife, domestic animals, and humans along a landscape gradient from a protected area to a residential community, through areas of reforestation and agricultural land. Here, we present the protocols of the project that combine virus screening in humans, bats, rodents and dogs with camera trapping, land-use characterization, and network analyses. The project is taking place in the sub-district of Saen Thong (Nan Province, Thailand) in collaboration with local communities, the District Public Health Office, and Nanthaburi National Park. To formulate a predictive hypothesis for the Spillover Interface Project, we assess the wildlife diversity and their viral diversity that could be observed in Saen Thong through a data science analysis approach. Potential mammalian species are estimated using data from the International Union for Conservation of Nature (IUCN) and their associated viral diversity from a published open database. A network analysis approach is used to represent and quantify the transmission of the potential viruses hosted by the mammals present in Saen Thong, according to the IUCN. A total of 57 viruses are expected to be found and shared between 43 host species, including the domestic dog and the human species. By following the protocols presented here, the Spillover Interface Project will collect the data and samples needed to test this data-driven prediction.
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Affiliation(s)
| | | | - Pipat Soisook
- Princess Maha Chakri Sirindhorn Natural History Museum, Prince of Songkla University, Songkla, Thailand
| | - Anamika Kritiyakan
- Faculty of Veterinary Technology, Kasetsart University, Bangkok, Thailand
| | | | | | - Malee Tanita
- Primary Care Unit (PCU), Saenthong, Thawangpha, Nan, Thailand
| | | | - Phurin Makaew
- Faculty of Veterinary Technology, Kasetsart University, Bangkok, Thailand
| | - Awatsaya Pimsai
- Princess Maha Chakri Sirindhorn Natural History Museum, Prince of Songkla University, Songkla, Thailand
| | - Abdulloh Samoh
- Princess Maha Chakri Sirindhorn Natural History Museum, Prince of Songkla University, Songkla, Thailand
| | - Christophe Mahuzier
- Institut d’Ecologie et des Sciences de l’Environnement de Paris (iEES Paris)—Centre de Recherche IRD, Montpellier, France
| | - Serge Morand
- Faculty of Veterinary Technology, Kasetsart University, Bangkok, Thailand
- MIVEGEC, CNRS–IRD–MUSE, Montpellier Université, Montpellier, France
- Faculty of Tropical Medicine, Department of Helminthology, Mahidol University, Bangkok, Thailand
| | - Kittipong Chaisiri
- Faculty of Tropical Medicine, Department of Helminthology, Mahidol University, Bangkok, Thailand
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21
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Lamont KA, Boynton MH, Hickman DL, Fletcher CA, Williams MD. Acute Effects of Hypothermia and Inhalant Anesthesia on Ultrasonic Vocalizations and Neuroendocrine Markers in Neonatal Rats. JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE : JAALAS 2024; 63:57-66. [PMID: 38040412 PMCID: PMC10844739 DOI: 10.30802/aalas-jaalas-23-000008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 02/28/2023] [Accepted: 10/23/2023] [Indexed: 12/03/2023]
Abstract
Neonatal rodents undergo anesthesia for numerous procedures and for euthanasia by anesthetic overdose. However, data regarding whether neonatal anesthesia is humane are limited. Hypothermia (cryoanesthesia) is the most commonly used anesthetic protocol for neonatal rats 10 d of age or younger. However, hypothermia has recently been restricted in several countries due to perceived painful effects, including pain on rewarming. Minimizing the potential pain and distress of neonates in research is imperative, although very challenging. Traditional validated and nonvalidated behavioral and physiologic outcome measures used for adult rats undergoing anesthesia are unsuitable for evaluating neonates. Therefore, we investigated the effects of several anesthetic methods on neonatal rats by using the innovative objective approaches of noninvasive ultrasonic vocalizations and more invasive neuroendocrine responses (i. e., serum corticosterone, norepinephrine, glucose). Our results show that hypothermia leads to heightened acute distress in neonatal rats as indicated by prolonged recovery times, increased duration of vocalizations, and elevated corticosterone levels, as compared with neonates undergoing inhalational anesthesia. We demonstrate that inhalational anesthesia is preferable to cryoanesthesia for neonatal rats, and researchers using hypothermia anesthesia should consider using inhalational anesthesia as an alternative method.
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Affiliation(s)
| | - Marcella H Boynton
- Division of General Medicine and Clinical Epidemiology, School of Medicine, and
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Debra L Hickman
- Laboratory Animal Resource Center, Indiana University School of Medicine, Indianapolis, Indiana
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana; and
| | - Craig A Fletcher
- Division of Comparative Medicine
- Department of Pathology and Laboratory Medicine
| | - Morika D Williams
- Division of Comparative Medicine
- Department of Pathology and Laboratory Medicine
- Thurston Arthritis Research Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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22
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Chen YC, Zheng G, Donner DG, Wright DK, Greenwood JP, Marwick TH, McMullen JR. Cardiovascular magnetic resonance imaging for sequential assessment of cardiac fibrosis in mice: technical advancements and reverse translation. Am J Physiol Heart Circ Physiol 2024; 326:H1-H24. [PMID: 37921664 PMCID: PMC11213480 DOI: 10.1152/ajpheart.00437.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 10/23/2023] [Accepted: 10/23/2023] [Indexed: 11/04/2023]
Abstract
Cardiovascular magnetic resonance (CMR) imaging has become an essential technique for the assessment of cardiac function and morphology, and is now routinely used to monitor disease progression and intervention efficacy in the clinic. Cardiac fibrosis is a common characteristic of numerous cardiovascular diseases and often precedes cardiac dysfunction and heart failure. Hence, the detection of cardiac fibrosis is important for both early diagnosis and the provision of guidance for interventions/therapies. Experimental mouse models with genetically and/or surgically induced disease have been widely used to understand mechanisms underlying cardiac fibrosis and to assess new treatment strategies. Improving the appropriate applications of CMR to mouse studies of cardiac fibrosis has the potential to generate new knowledge, and more accurately examine the safety and efficacy of antifibrotic therapies. In this review, we provide 1) a brief overview of different types of cardiac fibrosis, 2) general background on magnetic resonance imaging (MRI), 3) a summary of different CMR techniques used in mice for the assessment of cardiac fibrosis including experimental and technical considerations (contrast agents and pulse sequences), and 4) provide an overview of mouse studies that have serially monitored cardiac fibrosis during disease progression and/or therapeutic interventions. Clinically established CMR protocols have advanced mouse CMR for the detection of cardiac fibrosis, and there is hope that discovery studies in mice will identify new antifibrotic therapies for patients, highlighting the value of both reverse translation and bench-to-bedside research.
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Affiliation(s)
- Yi Ching Chen
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Baker Department of Cardiometabolic Health, The University of Melbourne, Melbourne, Victoria, Australia
- Department of Diabetes, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Gang Zheng
- Monash Biomedical Imaging, Monash University, Melbourne, Victoria, Australia
| | - Daniel G Donner
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Baker Department of Cardiometabolic Health, The University of Melbourne, Melbourne, Victoria, Australia
- Department of Diabetes, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - David K Wright
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - John P Greenwood
- Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Thomas H Marwick
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Baker Department of Cardiometabolic Health, The University of Melbourne, Melbourne, Victoria, Australia
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
- Department of Cardiology, Royal Hobart Hospital, Hobart, Tasmania, Australia
| | - Julie R McMullen
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
- Baker Department of Cardiometabolic Health, The University of Melbourne, Melbourne, Victoria, Australia
- Department of Diabetes, Central Clinical School, Monash University, Melbourne, Victoria, Australia
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
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23
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Nemzek JA, Hakenjos JM, Hoenerhoff MJ, Fry CD. Isoflurane and Pentobarbital Anesthesia for Pulmonary Studies Requiring Prolonged Mechanical Ventilation in Mice. JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE : JAALAS 2024; 63:41-48. [PMID: 38065567 PMCID: PMC10844742 DOI: 10.30802/aalas-jaalas-23-000014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/27/2023] [Accepted: 05/31/2023] [Indexed: 02/08/2024]
Abstract
Mechanical ventilation can be used in mice to support high-risk anesthesia or to create clinically relevant, intensive care models. However, the choice of anesthetic and inspired oxygen concentration for prolonged procedures may affect basic physiology and lung inflammation. To characterize the effects of anesthetics and oxygen concentration in mice experiencing mechanical ventilation, mice were anesthetized with either isoflurane or pentobarbital for tracheostomy followed by mechanical ventilation with either 100% or 21% oxygen. Body temperature, oxygen saturation, and pulse rate were monitored continuously. After 6 h, mice were euthanized for collection of blood and bronchoalveolar lavage fluid for evaluation of biomarkers of inflammation and lung injury, including cell counts and cytokine levels. Overall, both isoflurane and pentobarbital provided suitable anesthesia for 6 h of mechanical ventilation with either 21% or 100% oxygen. We found no differences in lung inflammation biomarkers attributable to either oxygen concentration or the anesthetic. However, the combination of pentobarbital and 100% oxygen resulted in a significantly higher concentration of a biomarker for lung epithelial cell injury. This study demonstrates that the combination of anesthetic agent, mechanical ventilation, and inspired oxygen concentrations can alter vital signs and lung injury biomarkers during prolonged procedures. Their combined impact may influence model development and the interpretation of research results, warranting the need for preliminary evaluation to establish the baseline effects.
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Affiliation(s)
- Jean A Nemzek
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, Michigan; and
| | | | - Mark J Hoenerhoff
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, Michigan; and
| | - Christopher D Fry
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, Michigan; and
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24
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Mysiewicz S, Hibl B, Dopico A, Bukiya A. Commonly used anesthetics modify alcohol and (-)-trans-delta9-tetrahydrocannabinol in vivo effects on rat cerebral arterioles. BMC Anesthesiol 2023; 23:411. [PMID: 38087263 PMCID: PMC10714523 DOI: 10.1186/s12871-023-02320-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 10/24/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Ethyl alcohol and cannabis are widely used recreational substances with distinct effects on the brain. These drugs increase accidental injuries requiring treatment under anesthesia. Moreover, alcohol and cannabis are often used in anesthetized rodents for biomedical research. Here, we compared the influence of commonly used forms of anesthesia, injectable ketamine/xylazine (KX) versus inhalant isoflurane, on alcohol- and (-)-trans-delta9-tetrahydrocannabinol (THC) effects on cerebral arteriole diameter evaluated in vivo. METHODS Studies were performed on male and female Sprague-Dawley rats subjected to intracarotid catheter placement for drug infusion, and cranial window surgery for monitoring pial arteriole diameter. Depth of anesthesia was monitored every 10-15 min by toe-pinch. Under KX, the number of toe-pinch responders was maximal after the first dose of anesthesia and diminished over time in both males and females. In contrast, the number of toe-pinch responders under isoflurane slowly raised over time, leading to increase in isoflurane percentage until deep anesthesia was re-established. Rectal temperature under KX remained stable in males while dropping in females. As expected for gaseous anesthesia, both males and females exhibited rectal temperature drops under isoflurane. RESULTS Infusion of 50 mM alcohol (ethanol, EtOH) into the cerebral circulation rendered robust constriction in males under KX anesthesia, this alcohol action being significantly smaller, but still present under isoflurane anesthesia. In females, EtOH did not cause measurable changes in pial arteriole diameter regardless of the anesthetic. These findings indicate a strong sex bias with regards to EtOH induced vasoconstriction. Infusion of 42 nM THC in males and females under isoflurane tended to constrict cerebral arterioles in both males and females when compared to isovolumic infusion of THC vehicle (dimethyl sulfoxide in saline). Moreover, THC-driven changes in arteriole diameter significantly differed in magnitude depending on the anesthetic used. Simultaneous administration of 50 mM alcohol and 42 nM THC to males constricted cerebral arterioles regardless of the anesthetic used. In females, constriction by the combined drugs was also observed, with limited influence by anesthetic presence. CONCLUSIONS We demonstrate that two commonly used anesthetic formulations differentially influence the level of vasoconstriction caused by alcohol and THC actions in cerebral arterioles.
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Affiliation(s)
- Steven Mysiewicz
- Department of Pharmacology, Addiction Science and Toxicology, College of Medicine, The University of Tennessee Health Science Center, 71 S. Manassas, Memphis, TN, 38103, USA
| | - Brianne Hibl
- Laboratory Animal Care Unit, The University of Tennessee Health Science Center, Memphis, TN, 38103, USA
| | - Alex Dopico
- Department of Pharmacology, Addiction Science and Toxicology, College of Medicine, The University of Tennessee Health Science Center, 71 S. Manassas, Memphis, TN, 38103, USA
| | - Anna Bukiya
- Department of Pharmacology, Addiction Science and Toxicology, College of Medicine, The University of Tennessee Health Science Center, 71 S. Manassas, Memphis, TN, 38103, USA.
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Shadmani A, Ercal O, Uzun S, Swarup A, Wu AY. Regenerated Corneal Epithelium Expresses More βIII-Tubulin After Chemical Injuries Compared to Mechanical Injuries. Transl Vis Sci Technol 2023; 12:12. [PMID: 38085248 PMCID: PMC10720757 DOI: 10.1167/tvst.12.12.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 10/31/2023] [Indexed: 12/17/2023] Open
Abstract
Purpose Defining the regenerative response following various types of corneal chemical and mechanical injuries is important for understanding the pathophysiology of the injury and evaluating the effectiveness of the therapies. This study characterizes corneal epithelial healing in a murine chemical and mechanical injury model. Methods Four groups of 10 mice each received complete corneolimbal injuries by AlgerBrush, AlgerBrush/thermal, NaOH (0.5 N), or ethanol. Slit-lamp and optical coherence tomography examinations were performed daily for 14 days. Corneal opacity (CO) and neovascularization (NV) were evaluated. The origin of the regenerated epithelium was illustrated by anti-cytokeratin 12 (K12) and anti-K13. The height of regenerated corneal epithelium and intraepithelial free nerve endings (FNEs) stained with anti-βIII-tubulin were measured. The amount of fibrosis was measured by anti-α-smooth muscle actin (α-SMA) monoclonal antibody in the different groups. Statistical analysis was performed by ANOVA and t-test. Results Corneal opacity and neovascularization were markedly higher in the NaOH and AlgerBrush/thermal groups. Molecular studies revealed the following: Regenerated corneal epithelium thickness was less than normal in all groups, the AlgerBrush group had the shortest height of the regenerated epithelium, βIII-tubulin was expressed in the entire height of corneal epithelium in all groups except in the AlgerBrush group, and K12 was replaced by K13 in all groups. Conclusions Corneal wound healing is more effective following chemical injuries in terms of epithelial thickness. Inflammation may play an important role in the outcome. Translational Relevance Inflammation following different injuries may be redirected to be more effective in corneal regeneration and clarity.
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Affiliation(s)
- Athar Shadmani
- Department of Ophthalmology, Stanford University School of Medicine, Stanford, CA, USA
| | - Ozlem Ercal
- Department of Ophthalmology, Stanford University School of Medicine, Stanford, CA, USA
| | - Salih Uzun
- Department of Ophthalmology, Stanford University School of Medicine, Stanford, CA, USA
| | - Aditi Swarup
- Department of Ophthalmology, Stanford University School of Medicine, Stanford, CA, USA
| | - Albert Y. Wu
- Department of Ophthalmology, Stanford University School of Medicine, Stanford, CA, USA
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Chase LS, Zaleski MH, Morrell LJ, Brenner JS. Automated measurement of distance-walked as a "sixth vital sign" for detecting infusion reactions during preclinical testing. Int J Pharm 2023; 645:123369. [PMID: 37696344 DOI: 10.1016/j.ijpharm.2023.123369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/28/2023] [Accepted: 09/01/2023] [Indexed: 09/13/2023]
Abstract
Infusion reactions are a major risk for advanced therapeutics (e.g., engineered proteins nanoparticles, etc.), which can trigger the complement cascade, anaphylaxis, and other life-threatening immune responses. However, during the early phases of development, it is uncommon to assess for infusion reactions, given the labor involved in measuring multiple physiological parameters in rodents. Therefore, we sought to develop an automated quantification of rodent locomotion to serve as a sensitive screening tool for infusion reactions, with minimal added labor-time for each experiment. Here we present the detailed methods for building a motion tracking cage for mice, requiring ∼$100 of materials, ∼2 h to build and set up completely, and employing freely available software (DeepLabCut). The distance-walked after injection was first shown to have the predicted effects for stimulants (caffeine), sedatives (ketamine), and toxins (lipopolysaccharide). Additionally, the distance-walked more sensitively detected the effects of these compounds than did pulse oximetry-based measurements of the classical vital signs of heart rate, respiratory rate, and blood oxygen saturation. Finally, we examined a nanomedicine formulation that has been in preclinical development, liposomes targeted to the cell adhesion molecule ICAM. While this formulation has been studied across dozens of publications, it has not previously been noted to produce an infusion reaction. However, the automated motion tracking cage showed that ICAM-liposomes markedly reduce the distance-walked, which we confirmed by measuring the other vital signs. Importantly, the motion tracking cage added < 5 min of labor time per 5-mouse condition, while pulse oximetry with a neck cuff (by far the most stable oximetry signal in mice) required ∼ 100 min of labor time. Thus, automated measurement of distance-walked can indeed serve as a "sixth vital sign" for detecting infusion reactions during preclinical testing. Additionally, the device to measure distance-walked is easy and cheap to build and requires negligible labor time for each experiment, enabling distance-walked to be recorded in nearly every infusion experiment.
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Affiliation(s)
- Liam S Chase
- Department of Pharmacology, The Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; Department of Bioengineering, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, USA.
| | - Michael H Zaleski
- Department of Pharmacology, The Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Lianne J Morrell
- Department of Pharmacology, The Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jacob S Brenner
- Department of Pharmacology, The Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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27
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Furue A, Hattori K, Hosono K, Tanabe M, Sato E, Honda M, Sekiguchi K, Ito Y, Majima M, Narumiya S, Kato K, Amano H. Inhibition of TP signaling promotes endometriosis growth and neovascularization. Mol Med Rep 2023; 28:192. [PMID: 37654213 PMCID: PMC10502949 DOI: 10.3892/mmr.2023.13079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 07/07/2023] [Indexed: 09/02/2023] Open
Abstract
Endometriosis is highly dependent on angiogenesis and lymphangiogenesis. Prostaglandin E2, an arachidonic acid metabolite, has been shown to promote the formation of new blood and lymphatic vessels. However, the role of another arachidonic acid metabolite, thromboxane A2 (TXA2) in angiogenesis and lymphangiogenesis during endometriosis remains largely unexplored. Using a murine model of ectopic endometrial transplantation, fragments from the endometrium of WT donor mice were transplanted into the peritoneal walls of recipient WT mice (WT→WT), resulting in an increase in both the area and density of blood and lymphatic vessels. Upon transplantation of endometrial tissue from thromboxane prostanoid (TP) receptor (TXA2 receptor)‑deficient (TP‑/‑) mice into TP‑/‑ mice (TP‑/‑→TP‑/‑), an increase in implant growth, angiogenesis, and lymphangiogenesis were observed along with upregulation of pro‑angiogenic and lymphangiogenic factors, including vascular endothelial growth factors (VEGFs). Similar results were obtained using a thromboxane synthase (TXS) inhibitor in WT→WT mice. Furthermore, TP‑/‑→TP‑/‑ mice had a higher number of F4/80+ cells than that of WT→WT mice, with increased expression of genes related to the anti‑inflammatory macrophage phenotype in endometrial lesions. In cultured bone marrow (BM)‑derived macrophages, the levels of VEGF‑A, VEGF‑C, and VEGF‑D decreased in a TP‑dependent manner. Furthermore, TP signaling affected the polarization of cultured BM‑derived macrophages to the anti‑inflammatory phenotype. These findings imply that inhibition of TP signaling promotes endometrial implant growth and neovascularization.
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Affiliation(s)
- Akiko Furue
- Department of Molecular Pharmacology, Graduate School of Medical Sciences, Sagamihara, Kanagawa 252-0374, Japan
- Department of Pharmacology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
- Department of Obstetrics and Gynecology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
| | - Kyoko Hattori
- Department of Obstetrics and Gynecology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
| | - Kanako Hosono
- Department of Molecular Pharmacology, Graduate School of Medical Sciences, Sagamihara, Kanagawa 252-0374, Japan
- Department of Pharmacology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
| | - Mina Tanabe
- Department of Molecular Pharmacology, Graduate School of Medical Sciences, Sagamihara, Kanagawa 252-0374, Japan
| | - Erina Sato
- Department of Obstetrics and Gynecology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
| | - Masako Honda
- Department of Obstetrics and Gynecology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
| | - Kazuki Sekiguchi
- Department of Obstetrics and Gynecology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
| | - Yoshiya Ito
- Department of Molecular Pharmacology, Graduate School of Medical Sciences, Sagamihara, Kanagawa 252-0374, Japan
- Department of Pharmacology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
| | - Masataka Majima
- Department of Medical Therapeutics, Kanagawa Institute of Technology, Atsugi, Kanagawa 243-0292, Japan
| | - Shuh Narumiya
- Laboratory of Molecular and Cellular Physiology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8507, Japan
| | - Kazuyoshi Kato
- Department of Obstetrics and Gynecology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
| | - Hideki Amano
- Department of Molecular Pharmacology, Graduate School of Medical Sciences, Sagamihara, Kanagawa 252-0374, Japan
- Department of Pharmacology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
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28
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Maxouri O, Bodalal Z, Daal M, Rostami S, Rodriguez I, Akkari L, Srinivas M, Bernards R, Beets-Tan R. How to 19F MRI: applications, technique, and getting started. BJR Open 2023; 5:20230019. [PMID: 37953866 PMCID: PMC10636348 DOI: 10.1259/bjro.20230019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 07/26/2023] [Accepted: 08/01/2023] [Indexed: 11/14/2023] Open
Abstract
Magnetic resonance imaging (MRI) plays a significant role in the routine imaging workflow, providing both anatomical and functional information. 19F MRI is an evolving imaging modality where instead of 1H, 19F nuclei are excited. As the signal from endogenous 19F in the body is negligible, exogenous 19F signals obtained by 19F radiofrequency coils are exceptionally specific. Highly fluorinated agents targeting particular biological processes (i.e., the presence of immune cells) have been visualised using 19F MRI, highlighting its potential for non-invasive and longitudinal molecular imaging. This article aims to provide both a broad overview of the various applications of 19F MRI, with cancer imaging as a focus, as well as a practical guide to 19F imaging. We will discuss the essential elements of a 19F system and address common pitfalls during acquisition. Last but not least, we will highlight future perspectives that will enhance the role of this modality. While not an exhaustive exploration of all 19F literature, we endeavour to encapsulate the broad themes of the field and introduce the world of 19F molecular imaging to newcomers. 19F MRI bridges several domains, imaging, physics, chemistry, and biology, necessitating multidisciplinary teams to be able to harness this technology effectively. As further technical developments allow for greater sensitivity, we envision that 19F MRI can help unlock insight into biological processes non-invasively and longitudinally.
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Affiliation(s)
| | | | | | | | | | - Leila Akkari
- Division of Tumor Biology and Immunology, Oncode Institute, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | | | - René Bernards
- Division of Molecular Carcinogenesis, Oncode Institute, The Netherlands Cancer Institute, Amsterdam, The Netherlands
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29
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Nunamaker EA, Turner PV. Unmasking the Adverse Impacts of Sex Bias on Science and Research Animal Welfare. Animals (Basel) 2023; 13:2792. [PMID: 37685056 PMCID: PMC10486396 DOI: 10.3390/ani13172792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/30/2023] [Accepted: 08/30/2023] [Indexed: 09/10/2023] Open
Abstract
Sex bias in biomedical and natural science research has been prevalent for decades. In many cases, the female estrous cycle was thought to be too complex an issue to model for, and it was thought to be simpler to only use males in studies. At times, particularly when studying efficacy and safety of new therapeutics, this sex bias has resulted in over- and under-medication with associated deleterious side effects in women. Many sex differences have been recognized that are unrelated to hormonal variation occurring during the estrous cycle. Sex bias also creates animal welfare challenges related to animal over-production and wastage, insufficient consideration of welfare (and scientific) impact related to differential housing of male vs female animals within research facilities, and a lack of understanding regarding differential requirements for pain recognition and alleviation in male versus female animals. Although many funding and government agencies require both sexes to be studied in biomedical research, many disparities remain in practice. This requires further enforcement of expectations by the Institutional Animal Care and Use Committee when reviewing protocols, research groups when writing grants, planning studies, and conducting research, and scientific journals and reviewers to ensure that sex bias policies are enforced.
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Affiliation(s)
- Elizabeth A. Nunamaker
- Global Animal Welfare and Training, Charles River Laboratories, Wilmington, MA 01887, USA;
| | - Patricia V. Turner
- Global Animal Welfare and Training, Charles River Laboratories, Wilmington, MA 01887, USA;
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
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30
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Grashei M, Wodtke P, Skinner JG, Sühnel S, Setzer N, Metzler T, Gulde S, Park M, Witt D, Mohr H, Hundshammer C, Strittmatter N, Pellegata NS, Steiger K, Schilling F. Simultaneous magnetic resonance imaging of pH, perfusion and renal filtration using hyperpolarized 13C-labelled Z-OMPD. Nat Commun 2023; 14:5060. [PMID: 37604826 PMCID: PMC10442412 DOI: 10.1038/s41467-023-40747-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 08/09/2023] [Indexed: 08/23/2023] Open
Abstract
pH alterations are a hallmark of many pathologies including cancer and kidney disease. Here, we introduce [1,5-13C2]Z-OMPD as a hyperpolarized extracellular pH and perfusion sensor for MRI which allows to generate a multiparametric fingerprint of renal disease status and to detect local tumor acidification. Exceptional long T1 of two minutes at 1 T, high pH sensitivity of up to 1.9 ppm per pH unit and suitability of using the C1-label as internal frequency reference enables pH imaging in vivo of three pH compartments in healthy rat kidneys. Spectrally selective targeting of both 13C-resonances enables simultaneous imaging of perfusion and filtration in 3D and pH in 2D within one minute to quantify renal blood flow, glomerular filtration rates and renal pH in healthy and hydronephrotic kidneys with superior sensitivity compared to clinical routine methods. Imaging multiple biomarkers within a single session renders [1,5-13C2]Z-OMPD a promising new hyperpolarized agent for oncology and nephrology.
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Affiliation(s)
- Martin Grashei
- Department of Nuclear Medicine, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, D-81675, Munich, Germany
| | - Pascal Wodtke
- Department of Nuclear Medicine, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, D-81675, Munich, Germany
| | - Jason G Skinner
- Department of Nuclear Medicine, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, D-81675, Munich, Germany
| | - Sandra Sühnel
- Department of Nuclear Medicine, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, D-81675, Munich, Germany
| | - Nadine Setzer
- Department of Nuclear Medicine, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, D-81675, Munich, Germany
| | - Thomas Metzler
- Comparative Experimental Pathology (CEP), Institute of Pathology, School of Medicine, Technical University of Munich, D-81675, Munich, Germany
| | - Sebastian Gulde
- Institute for Diabetes and Cancer, Helmholtz Zentrum München, D-85764, Neuherberg, Germany
| | - Mihyun Park
- Department of Biosciences, TUM School of Natural Sciences, Technical University of Munich, D-85748, Garching, Germany
| | - Daniela Witt
- Department of Biosciences, TUM School of Natural Sciences, Technical University of Munich, D-85748, Garching, Germany
| | - Hermine Mohr
- Institute for Diabetes and Cancer, Helmholtz Zentrum München, D-85764, Neuherberg, Germany
| | - Christian Hundshammer
- Department of Nuclear Medicine, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, D-81675, Munich, Germany
| | - Nicole Strittmatter
- Department of Biosciences, TUM School of Natural Sciences, Technical University of Munich, D-85748, Garching, Germany
| | - Natalia S Pellegata
- Institute for Diabetes and Cancer, Helmholtz Zentrum München, D-85764, Neuherberg, Germany
- Department of Biology and Biotechnology, University of Pavia, I-27100, Pavia, Italy
| | - Katja Steiger
- Comparative Experimental Pathology (CEP), Institute of Pathology, School of Medicine, Technical University of Munich, D-81675, Munich, Germany
| | - Franz Schilling
- Department of Nuclear Medicine, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, D-81675, Munich, Germany.
- Munich Institute of Biomedical Engineering, Technical University of Munich, D-85748, Garching, Germany.
- German Cancer Consortium (DKTK), Partner Site Munich and German Cancer Research Center (DKFZ), D-69120, Heidelberg, Germany.
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Muñoz-Ortiz T, Alayeto I, Lifante J, Ortgies DH, Marin R, Martín Rodríguez E, Iglesias de la Cruz MDC, Lifante-Pedrola G, Rubio-Retama J, Jaque D. 3D Optical Coherence Thermometry Using Polymeric Nanogels. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2301819. [PMID: 37352307 DOI: 10.1002/adma.202301819] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 06/04/2023] [Indexed: 06/25/2023]
Abstract
In nanothermometry, the use of nanoparticles as thermal probes enables remote and minimally invasive sensing. In the biomedical context, nanothermometry has emerged as a powerful tool where traditional approaches, like infrared thermal sensing and contact thermometers, fall short. Despite the strides of this technology in preclinical settings, nanothermometry is not mature enough to be translated to the bedside. This is due to two major hurdles: the inability to perform 3D thermal imaging and the requirement for tools that are readily available in the clinics. This work simultaneously overcomes both limitations by proposing the technology of optical coherence thermometry (OCTh). This is achieved by combining thermoresponsive polymeric nanogels and optical coherence tomography (OCT)-a 3D imaging technology routinely used in clinical practice. The volume phase transition of the thermoresponsive nanogels causes marked changes in their refractive index, making them temperature-sensitive OCT contrast agents. The ability of OCTh to provide 3D thermal images is demonstrated in tissue phantoms subjected to photothermal processes, and its reliability is corroborated by comparing experimental results with numerical simulations. The results included in this work set credible foundations for the implementation of nanothermometry in the form of OCTh in clinical practice.
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Affiliation(s)
- Tamara Muñoz-Ortiz
- nanomaterials for BioImaging Group (nanoBIG), Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/ Francisco Tomás y Valiente 7, Madrid, 28049, Spain
- Instituto Nicolás Cabrera, Facultad de Ciencias, Universidad Autónoma de Madrid, C/ Francisco Tomás y Valiente 7, Madrid, 28049, Spain
| | - Idoia Alayeto
- Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Plaza de Ramón y Cajal, s/n, Universidad Complutense de Madrid, Madrid, 28040, Spain
| | - José Lifante
- nanomaterials for BioImaging Group (nanoBIG), Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, Avda. Arzobispo Morcillo 2, Madrid, 28029, Spain
- nanomaterials for BioImaging Group (nanoBIG), Instituto Ramón y Cajal de Investigación Sanitaria, Ctra de Colmenar Viejo Km 9,100, Madrid, 28034, Spain
| | - Dirk H Ortgies
- nanomaterials for BioImaging Group (nanoBIG), Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/ Francisco Tomás y Valiente 7, Madrid, 28049, Spain
- Instituto Nicolás Cabrera, Facultad de Ciencias, Universidad Autónoma de Madrid, C/ Francisco Tomás y Valiente 7, Madrid, 28049, Spain
- nanomaterials for BioImaging Group (nanoBIG), Instituto Ramón y Cajal de Investigación Sanitaria, Ctra de Colmenar Viejo Km 9,100, Madrid, 28034, Spain
- nanomaterials for BioImaging Group (nanoBIG), Departamento de Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Riccardo Marin
- nanomaterials for BioImaging Group (nanoBIG), Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/ Francisco Tomás y Valiente 7, Madrid, 28049, Spain
- Instituto Nicolás Cabrera, Facultad de Ciencias, Universidad Autónoma de Madrid, C/ Francisco Tomás y Valiente 7, Madrid, 28049, Spain
- nanomaterials for BioImaging Group (nanoBIG), Departamento de Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Emma Martín Rodríguez
- Instituto Nicolás Cabrera, Facultad de Ciencias, Universidad Autónoma de Madrid, C/ Francisco Tomás y Valiente 7, Madrid, 28049, Spain
- nanomaterials for BioImaging Group (nanoBIG), Instituto Ramón y Cajal de Investigación Sanitaria, Ctra de Colmenar Viejo Km 9,100, Madrid, 28034, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid, 28049, Spain
- nanomaterials for BioImaging Group (nanoBIG), Departamento de Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - María Del Carmen Iglesias de la Cruz
- nanomaterials for BioImaging Group (nanoBIG), Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, Avda. Arzobispo Morcillo 2, Madrid, 28029, Spain
| | - Ginés Lifante-Pedrola
- nanomaterials for BioImaging Group (nanoBIG), Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/ Francisco Tomás y Valiente 7, Madrid, 28049, Spain
| | - Jorge Rubio-Retama
- Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Plaza de Ramón y Cajal, s/n, Universidad Complutense de Madrid, Madrid, 28040, Spain
- nanomaterials for BioImaging Group (nanoBIG), Instituto Ramón y Cajal de Investigación Sanitaria, Ctra de Colmenar Viejo Km 9,100, Madrid, 28034, Spain
| | - Daniel Jaque
- nanomaterials for BioImaging Group (nanoBIG), Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/ Francisco Tomás y Valiente 7, Madrid, 28049, Spain
- Instituto Nicolás Cabrera, Facultad de Ciencias, Universidad Autónoma de Madrid, C/ Francisco Tomás y Valiente 7, Madrid, 28049, Spain
- nanomaterials for BioImaging Group (nanoBIG), Instituto Ramón y Cajal de Investigación Sanitaria, Ctra de Colmenar Viejo Km 9,100, Madrid, 28034, Spain
- nanomaterials for BioImaging Group (nanoBIG), Departamento de Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
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Domarecka E, Szczepek AJ. Universal Recommendations on Planning and Performing the Auditory Brainstem Responses (ABR) with a Focus on Mice and Rats. Audiol Res 2023; 13:441-458. [PMID: 37366685 DOI: 10.3390/audiolres13030039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/17/2023] [Accepted: 05/29/2023] [Indexed: 06/28/2023] Open
Abstract
Translational audiology research aims to transfer basic research findings into practical clinical applications. While animal studies provide essential knowledge for translational research, there is an urgent need to improve the reproducibility of data derived from these studies. Sources of variability in animal research can be grouped into three areas: animal, equipment, and experimental. To increase standardization in animal research, we developed universal recommendations for designing and conducting studies using a standard audiological method: auditory brainstem response (ABR). The recommendations are domain-specific and are intended to guide the reader through the issues that are important when applying for ABR approval, preparing for, and conducting ABR experiments. Better experimental standardization, which is the goal of these guidelines, is expected to improve the understanding and interpretation of results, reduce the number of animals used in preclinical studies, and improve the translation of knowledge to the clinic.
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Affiliation(s)
- Ewa Domarecka
- Department of Otorhinolaryngology, Head and Neck Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, 10117 Berlin, Germany
| | - Agnieszka J Szczepek
- Department of Otorhinolaryngology, Head and Neck Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, 10117 Berlin, Germany
- Faculty of Medicine and Health Sciences, University of Zielona Gora, 65-046 Zielona Gora, Poland
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Won J, Khan ZA, Hong Y. Effects of isoflurane and xylazine on inducing cerebral ischemia by the model of middle cerebral artery occlusion in mice. Lab Anim Res 2023; 39:11. [PMID: 37264475 DOI: 10.1186/s42826-023-00163-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/22/2023] [Accepted: 05/30/2023] [Indexed: 06/03/2023] Open
Abstract
Preclinical ischemic stroke studies extensively utilize the intraluminal suture method of middle cerebral artery occlusion (MCAo). General anesthesia administration is an essential step for MCAo, but anesthetic agents can lead to adverse effects causing death and making a considerable impact on inducing cerebral ischemia. The purpose of this study was to comparatively assess the effect of isoflurane and xylazine on transient cerebral ischemia in a mouse model of MCAo. Twenty animals were randomly divided into four groups: sham group (no MCAo), control group (MCAo under isoflurane, no agent till reperfusion), isoflurane group (MCAo under isoflurane continued till reperfusion), xylazine group (MCAo under isoflurane, and administration of xylazine till reperfusion). The survival rate, brain infarct volume, and neurologic deficits were studied to assess the effect of isoflurane and xylazine on the stroke model. Our results showed that the body weight showed statistically significant change before and 24 h after surgery in the control and Isoflurane groups, but no difference in the Xylazine group. Also, the survival rate, brain infarct volume, and neurologic deficits were slightly reduced in the isoflurane group at 24 h after reperfusion injury. However, the xylazine and control groups showed similar BIV and neurologic deficits. Interestingly, a high survival rate was observed in the xylazine group. Our results indicate that the modified method of inhalation anesthetics combined with xylazine can reduce the risk of mortality and develop a reproducible MCAo model with predictable brain ischemia. In addition, extended isoflurane anesthesia after MCAo is associated with the risk of mortality.
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Affiliation(s)
- Jinyoung Won
- Department of Rehabilitation Science, Graduate School of Inje University, 197 Inje-ro, Gimhae, Gyeong-nam, 50834, Republic of Korea
- Research Center for Aged-life Redesign (RCAR), Inje University, Gimhae, Republic of Korea
- Biohealth Products Research Center (BPRC), Inje University, Gimhae, Republic of Korea
| | - Zeeshan Ahmad Khan
- Research Center for Aged-life Redesign (RCAR), Inje University, Gimhae, Republic of Korea
- Biohealth Products Research Center (BPRC), Inje University, Gimhae, Republic of Korea
- Department of Physical Therapy, College of Healthcare Medical Science and Engineering, Inje University, Gimhae, Republic of Korea
| | - Yonggeun Hong
- Department of Rehabilitation Science, Graduate School of Inje University, 197 Inje-ro, Gimhae, Gyeong-nam, 50834, Republic of Korea.
- Research Center for Aged-life Redesign (RCAR), Inje University, Gimhae, Republic of Korea.
- Biohealth Products Research Center (BPRC), Inje University, Gimhae, Republic of Korea.
- Department of Physical Therapy, College of Healthcare Medical Science and Engineering, Inje University, Gimhae, Republic of Korea.
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34
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O'Riordan CE, Trochet P, Steiner M, Fuchs D. Standardisation and future of preclinical echocardiography. Mamm Genome 2023; 34:123-155. [PMID: 37160810 DOI: 10.1007/s00335-023-09981-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 01/31/2023] [Indexed: 05/11/2023]
Abstract
Echocardiography is a non-invasive imaging technique providing real-time information to assess the structure and function of the heart. Due to advancements in technology, ultra-high-frequency transducers have enabled the translation of ultrasound from humans to small animals due to resolutions down to 30 µm. Most studies are performed using mice and rats, with ages ranging from embryonic, to neonatal, and adult. In addition, alternative models such as zebrafish and chicken embryos are becoming more frequently used. With the achieved high temporal and spatial resolution in real-time, cardiac function can now be monitored throughout the lifespan of these small animals to investigate the origin and treatment of a range of acute and chronic pathological conditions. With the increased relevance of in vivo real-time imaging, there is still an unmet need for the standardisation of small animal echocardiography and the appropriate cardiac measurements that should be reported in preclinical cardiac models. This review focuses on the development of standardisation in preclinical echocardiography and reports appropriate cardiac measurements throughout the lifespan of rodents: embryonic, neonatal, ageing, and acute and chronic pathologies. Lastly, we will discuss the future of cardiac preclinical ultrasound.
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Affiliation(s)
| | | | | | - Dieter Fuchs
- FUJIFILM VisualSonics, Inc, Amsterdam, The Netherlands.
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35
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Tomsits P, Volz L, Xia R, Chivukula A, Schüttler D, Clauß S. Medetomidine/midazolam/fentanyl narcosis alters cardiac autonomic tone leading to conduction disorders and arrhythmias in mice. Lab Anim (NY) 2023; 52:85-92. [PMID: 36959339 PMCID: PMC10063441 DOI: 10.1038/s41684-023-01141-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 02/15/2023] [Indexed: 03/25/2023]
Abstract
Arrhythmias are critical contributors to cardiovascular morbidity and mortality. Therapies are mainly symptomatic and often insufficient, emphasizing the need for basic research to unveil the mechanisms underlying arrhythmias and to enable better and ideally causal therapies. In translational approaches, mice are commonly used to study arrhythmia mechanisms in vivo. Experimental electrophysiology studies in mice are performed under anesthesia with medetomidine/midazolam/fentanyl (MMF) and isoflurane/fentanyl (IF) as commonly used regimens. Despite evidence of adverse effects of individual components on cardiac function, few data are available regarding the specific effects of these regimens on cardiac electrophysiology in mice. Here we present a study investigating the effects of MMF and IF narcosis on cardiac electrophysiology in vivo in C57BL/6N wild-type mice. Telemetry transmitters were implanted in a group of mice, which served as controls for baseline parameters without narcosis. In two other groups of mice, electrocardiogram and invasive electrophysiology studies were performed under narcosis (with either MMF or IF). Basic electrocardiogram parameters, heart rate variability parameters, sinus node and atrioventricular node function, and susceptibility to arrhythmias were assessed. Experimental data suggest a remarkable influence of MMF on cardiac electrophysiology compared with IF and awake animals. While IF only moderately reduced heart rate, MMF led to significant bradycardia, spontaneous arrhythmias, heart rate variability alterations as well as sinus and AV node dysfunction, and increased inducibility of ventricular arrhythmias. On the basis of these observed effects, we suggest avoiding MMF in mice, specifically when studying cardiac electrophysiology, but also whenever a regular heartbeat is required for reliable results, such as in heart failure or imaging research.
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Affiliation(s)
- Philipp Tomsits
- Medizinische Klinik und Poliklinik I, University Hospital Munich, Campus Grosshadern and Innenstadt, Ludwig-Maximilians University Munich (LMU), Munich, Germany.
- DZHK (German Centre for Cardiovascular Research), Partner Site Munich, Munich Heart Alliance (MHA), Munich, Germany.
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany.
| | - Lina Volz
- Medizinische Klinik und Poliklinik I, University Hospital Munich, Campus Grosshadern and Innenstadt, Ludwig-Maximilians University Munich (LMU), Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Munich, Munich Heart Alliance (MHA), Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Ruibing Xia
- Medizinische Klinik und Poliklinik I, University Hospital Munich, Campus Grosshadern and Innenstadt, Ludwig-Maximilians University Munich (LMU), Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Aparna Chivukula
- Medizinische Klinik und Poliklinik I, University Hospital Munich, Campus Grosshadern and Innenstadt, Ludwig-Maximilians University Munich (LMU), Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Munich, Munich Heart Alliance (MHA), Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Dominik Schüttler
- Medizinische Klinik und Poliklinik I, University Hospital Munich, Campus Grosshadern and Innenstadt, Ludwig-Maximilians University Munich (LMU), Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Munich, Munich Heart Alliance (MHA), Munich, Germany
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Sebastian Clauß
- Medizinische Klinik und Poliklinik I, University Hospital Munich, Campus Grosshadern and Innenstadt, Ludwig-Maximilians University Munich (LMU), Munich, Germany.
- DZHK (German Centre for Cardiovascular Research), Partner Site Munich, Munich Heart Alliance (MHA), Munich, Germany.
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany.
- Interfaculty Center for Endocrine and Cardiovascular Disease Network Modelling and Clinical Transfer (ICONLMU), LMU Munich, Munich, Germany.
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36
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Balafas EG, Papakyriakopoulou PI, Kostomitsopoulos NG, Valsami GN. Intranasal Administration of a Polymeric Biodegradable Film to C57BL/6 Mice. JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE : JAALAS 2023; 62:179-184. [PMID: 36898691 PMCID: PMC10078934 DOI: 10.30802/aalas-jaalas-22-000091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/28/2022] [Accepted: 12/09/2022] [Indexed: 03/12/2023]
Abstract
Nasal drug delivery in rodents is a challenging procedure, especially for brain targeting, as the position of the material in the nasal cavity determines the success of the administration method. The objective of this study was to assess a novel intranasal administration technique for nose-to-brain delivery of biodegradable nasal films. The method was performed in C57BL/6 (n = 10; age, 8 wk) under inhaled sevoflurane. Twenty-four gauge catheters were used for the procedure. Hydroxypropyl methyl-cellulosebased film was formed in the lumen of the catheter and then delivered into the mouse nostril by pushing it out of the lumen using a trimmed and polished needle. Methylene blue was incorporated in the film-forming gel to indicate the delivery area in which the films were deposited. After administration, all mice recovered from anesthesia without incident. None of the mice showed any signs of injury, discomfort, or nose bleeding, thus allowing us to characterize the administration method as noninvasive. Furthermore, postmortem evaluation revealed olfactory-centered placement of the polymeric films, confirming the accuracy and repeatability of the method. In conclusion, this study documented the use of, a novel, noninvasive, intranasal administration technique for nose-to-brain drug delivery in biodegradable films for use in mice.
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Affiliation(s)
- Evangelos G Balafas
- Laboratory Animal Facility, Centre of Clinical and Experimental Surgery and Translational Research, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Paraskevi I Papakyriakopoulou
- Laboratory of Biopharmaceutics-Pharmacokinetics, Faculty of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens, Greece;,
| | - Nikolaos G Kostomitsopoulos
- Laboratory Animal Facility, Centre of Clinical and Experimental Surgery and Translational Research, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Georgia N Valsami
- Laboratory of Biopharmaceutics-Pharmacokinetics, Faculty of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens, Greece
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Menon V, Cerri D, Lee B, Yuan R, Lee SH, Shih YYI. Optogenetic stimulation of anterior insular cortex neurons in male rats reveals causal mechanisms underlying suppression of the default mode network by the salience network. Nat Commun 2023; 14:866. [PMID: 36797303 PMCID: PMC9935890 DOI: 10.1038/s41467-023-36616-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 02/09/2023] [Indexed: 02/18/2023] Open
Abstract
The salience network (SN) and default mode network (DMN) play a crucial role in cognitive function. The SN, anchored in the anterior insular cortex (AI), has been hypothesized to modulate DMN activity during stimulus-driven cognition. However, the causal neural mechanisms underlying changes in DMN activity and its functional connectivity with the SN are poorly understood. Here we combine feedforward optogenetic stimulation with fMRI and computational modeling to dissect the causal role of AI neurons in dynamic functional interactions between SN and DMN nodes in the male rat brain. Optogenetic stimulation of Chronos-expressing AI neurons suppressed DMN activity, and decreased AI-DMN and intra-DMN functional connectivity. Our findings demonstrate that feedforward optogenetic stimulation of AI neurons induces dynamic suppression and decoupling of the DMN and elucidates previously unknown features of rodent brain network organization. Our study advances foundational knowledge of causal mechanisms underlying dynamic cross-network interactions and brain network switching.
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Grants
- R01 MH121069 NIMH NIH HHS
- P50 HD103573 NICHD NIH HHS
- T32 AA007573 NIAAA NIH HHS
- R01 NS091236 NINDS NIH HHS
- R01 MH126518 NIMH NIH HHS
- S10 MH124745 NIMH NIH HHS
- U01 AA020023 NIAAA NIH HHS
- R01 MH111429 NIMH NIH HHS
- S10 OD026796 NIH HHS
- R01 NS086085 NINDS NIH HHS
- R01 EB022907 NIBIB NIH HHS
- P60 AA011605 NIAAA NIH HHS
- RF1 NS086085 NINDS NIH HHS
- RF1 MH117053 NIMH NIH HHS
- This work was supported in part by the National Institute of Mental Health (R01MH121069 to V.M., and R01MH126518, RF1MH117053, R01MH111429, S10MH124745 to Y.-Y.I.S.), National Institute on Alcohol Abuse and Alcoholism (P60AA011605 and U01AA020023 to Y.-Y.I.S., T32AA007573 to D.C.), National Institute of Neurological Disorders and Stroke (R01NS086085 to V.M., R01NS091236 to Y.-Y.I.S.), National Institute of Child Health and Human Development (P50HD103573 to Y.-Y.I.S.), National Institute of Biomedical Imaging and Bioengineering (R01EB022907 to V.M.), and National Institute of Health Office of the Director (S10OD026796 to Y.-Y.I.S.).
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Affiliation(s)
- Vinod Menon
- Department of Psychiatry & Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, 94305, USA.
- Department of Neurology & Neurological Sciences, Stanford University School of Medicine, Stanford, CA, 94305, USA.
- Wu Tsai Neuroscience Institute, Stanford University School of Medicine, Stanford, CA, 94305, USA.
| | - Domenic Cerri
- Center for Animal MRI, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Biomedical Research Imaging Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Department of Neurology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Byeongwook Lee
- Department of Psychiatry & Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Rui Yuan
- Department of Psychiatry & Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Sung-Ho Lee
- Center for Animal MRI, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Biomedical Research Imaging Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Department of Neurology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Yen-Yu Ian Shih
- Center for Animal MRI, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
- Biomedical Research Imaging Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
- Department of Neurology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
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38
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Benković V, Milić M, Oršolić N, Horvat Knežević A, Brozović G, Borojević N. Brain DNA damaging effects of volatile anesthetics and 1 and 2 Gy gamma irradiation in vivo: Preliminary results. Toxicol Ind Health 2023; 39:67-80. [PMID: 36602468 DOI: 10.1177/07482337221145599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Although both can cause DNA damage, the combined impact of volatile anesthetics halothane/sevoflurane/isoflurane and radiotherapeutic exposure on sensitive brain cells in vivo has not been previously analyzed. Healthy Swiss albino male mice (240 in total, 48 groups) were exposed to either halothane/sevoflurane/isoflurane therapeutic doses alone (2 h); 1 or 2 gray of gamma radiation alone; or combined exposure. Frontal lobe brain samples from five animals were taken immediately and 2, 6, and 24 h after exposure. DNA damage and cellular repair index were analyzed using the alkaline comet assay and the tail intensity parameter. Elevated tail intensity levels for sevoflurane/halothane were the highest at 6 h and returned to baseline within 24 h for sevoflurane, but not for halothane, while isoflurane treatment caused lower tail intensity than control values. Combined exposure demonstrated a slightly halothane/sevoflurane protective and isoflurane protective effect, which was stronger for 2 than for 1 gray. Cellular repair indices and tail intensity histograms indicated different modes of action in DNA damage creation. Isoflurane/sevoflurane/halothane preconditioning demonstrated protective effects in sensitive brain cells in vivo. Owing to the constant increases in the combined use of radiotherapy and volatile anesthetics, further studies should explore the mechanisms behind these effects, including longer and multiple exposure treatments and in vivo brain tumor models.
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Affiliation(s)
- Vesna Benković
- Faculty of Science, 117036University of Zagreb, Zagreb, Croatia
| | - Mirta Milić
- Mutagenesis Unit, 118938Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Nada Oršolić
- Faculty of Science, 117036University of Zagreb, Zagreb, Croatia
| | | | - Gordana Brozović
- Department of Anesthesiology, Reanimatology and ICU, University Hospital for Tumors, 499232Sestre Milosrdnice University Hospital Centre, Zagreb, Croatia.,Faculty of Dental Medicine and Health, 84992University of Osijek, Osijek, Croatia
| | - Nikola Borojević
- 8256Warrington and Halton Teaching Hospitals NHS Foundation Trust, Warrington, UK
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Postnatal Changes of Somatostatin Expression in Hippocampi of C57BL/6 Mice; Modulation of Neuroblast Differentiation in the Hippocampus. Vet Sci 2023; 10:vetsci10020081. [PMID: 36851385 PMCID: PMC9964365 DOI: 10.3390/vetsci10020081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/05/2022] [Accepted: 01/19/2023] [Indexed: 01/25/2023] Open
Abstract
(1) Background: Somatostatin (SST) exhibits expressional changes in the brain during development, but its role is not still clear in brain development. (2) Methods: We investigated postnatal SST expression and its effects on hippocampal neurogenesis via administering SST subcutaneously to P7 mice for 7 days. (3) Results: In the hippocampal CA1 region, SST immunoreactivity reaches peak at P14. However, SST immunoreactivity significantly decreased at P21. In the CA2/3 region, the SST expression pattern was similar to the CA1, and SST-immunoreactive cells were most abundant at P14. In the dentate gyrus, SST-immunoreactive cells were most abundant at P7 and P14 in the polymorphic layer; as in CA1-3 regions, the immunoreactivity decreased at P21. To elucidate the role of SST in postnatal development, we administered SST subcutaneously to P7 mice for 7 days. In the subgranular zone of the hippocampal dentate gyrus, a significant increase was observed in immunoreactivity of doublecortin (DCX)-positive neuroblast after administration of SST.; (4) Conclusions: SST expression in the hippocampal sub-regions is transiently increased during the postnatal formation of the hippocampus and decreases after P21. In addition, SST is involved in neuroblast differentiation in the dentate gyrus of the hippocampus.
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40
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Ibrahim IM, Alsieni M, Almalki SG, Alqurashi YE, Kumar V. Comparative evaluation of natural neuroprotectives and their combinations on chronic immobilization stress-induced depression in experimental mice. 3 Biotech 2023; 13:22. [PMID: 36568496 PMCID: PMC9780413 DOI: 10.1007/s13205-022-03438-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
The present study evaluates the potential of neuroprotective phytochemicals-rutin (R), resveratrol (Res), 17β-estradiol (17β-E2), and their different combinations against chronic immobilization stress (CIS)-induced depression-like behaviour in male albino mice. Here, the mice were exposed to stress via immobilization of their four limbs under a restrainer for 6 h daily until 7 days of the induction after 30 min of respective drug treatment in different mice groups. The result found the protective effect of these phytoconstituents and their combinations against CIS-induced depression due to their ability to suppress oxidative stress, restore mitochondria, HPA-axis modulation, neurotransmitter level, stress hormones, and inflammatory markers. Also, the combination drug regimens of these phytoconstituents showed synergistic results in managing the physiological and biochemical features of depression. Thus, these neuroprotective could be utilized well in combination to manage depression-like symptoms during episodic stress. Furthermore, such results could be well justified when administered in polyherbal formulation with these neuroprotective as major components. In addition, an advanced study can be designed at the molecular and epigenetics level using a formulation based on these neuroprotective.
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Affiliation(s)
- Ibrahim M. Ibrahim
- Department of Pharmacology, Faculty of Medicine, King Abdulaziz University, Jeddah, 21589 Saudi Arabia
| | - Mohammed Alsieni
- Department of Pharmacology, Faculty of Medicine, King Abdulaziz University, Jeddah, 21589 Saudi Arabia
| | - Sami G. Almalki
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Majmaah, 11952 Saudi Arabia
| | - Yaser E. Alqurashi
- Department of Biology, College of Science Al-Zulfi, Majmaah University, Al-Majmaah, 11952 Saudi Arabia
| | - Vinay Kumar
- Department of Pharmacology, KIET Group of Institutions (KIET School of Pharmacy), Delhi-NCR, Ghaziabad, Uttar Pradesh 201206 India
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Zhao CH, Sun YH, Mao XM. Volume Incentive Spirometry Reduces Pulmonary Complications in Patients After Open Abdominal Surgery: A Randomized Clinical Trial. Int J Gen Med 2023; 16:793-801. [PMID: 36883125 PMCID: PMC9985979 DOI: 10.2147/ijgm.s400030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 02/20/2023] [Indexed: 03/05/2023] Open
Abstract
Objective To compare the effect of diaphragmatic breathing and volume incentive spirometry (VIS) on hemodynamics, pulmonary function, and blood gas in patients following open abdominal surgery under general anesthesia. Methods A total of 58 patients who received open abdominal surgery were randomly assigned to the control group (n=29) undergoing diaphragmatic breathing exercises and the VIS group (n=29) undergoing VIS exercises. All the participants performed the six-minute walk test (6MWT) preoperatively to evaluate their functional capacity. Hemodynamic indexes, pulmonary function tests, and blood gas indexes were recorded before surgery and on the 1st, 3rd, and 5th postoperative day. Results The functional capacity was not significantly different between the two groups during the preoperative period (P >0.05). At 3 days and 5 days postoperatively, patients in the VIS group had a significantly higher SpO2 than that in the control group (P <0.05). Pulmonary function test values were reduced in both two groups postoperatively when compared to the preoperative values but improved for three and five days afterward (P <0.05). Of note, the significantly elevated levels of peak expiratory flow (PEF), forced expiratory volume in the first second (FEV1), forced vital capacity (FVC), and FEV1/FVC ratio were observed on the 1st, 3rd, and 5th postoperative days in the VIS group compared with those in the control group (P <0.05). Besides, bass excess (BE), and pH values were significantly higher in the VIS group on the 1st postoperative day than those in the control group (P <0.05). Conclusion Diaphragmatic breathing and VIS could improve postoperative pulmonary function, but VIS exercise might be a better option for improving hemodynamics, pulmonary function, and blood gas for patients after open abdominal surgery, hence lowering the incidence of postoperative pulmonary complications.
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Affiliation(s)
- Chun-Hui Zhao
- Department of Respiratory Medicine, Haining People's Hospital, Haining, Zhejiang, 314400, People's Republic of China
| | - Ya-Hong Sun
- Department of Respiratory Medicine, Haining People's Hospital, Haining, Zhejiang, 314400, People's Republic of China
| | - Xiao-Min Mao
- Department of Infectious Diseases, Haining People's Hospital, Haining, Zhejiang, 314400, People's Republic of China
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Ahmadi-Noorbakhsh S, Farajli Abbasi M, Ghasemi M, Bayat G, Davoodian N, Sharif-Paghaleh E, Poormoosavi SM, Rafizadeh M, Maleki M, Shirzad-Aski H, Kargar Jahromi H, Dadkhah M, Khalvati B, Safari T, Behmanesh MA, Khoshnam SE, Houshmand G, Talaei SA. Anesthesia and analgesia for common research models of adult mice. Lab Anim Res 2022; 38:40. [PMID: 36514128 PMCID: PMC9746144 DOI: 10.1186/s42826-022-00150-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 11/23/2022] [Accepted: 12/06/2022] [Indexed: 12/15/2022] Open
Abstract
Anesthesia and analgesia are major components of many interventional studies on laboratory animals. However, various studies have shown improper reporting or use of anesthetics/analgesics in research proposals and published articles. In many cases, it seems "anesthesia" and "analgesia" are used interchangeably, while they are referring to two different concepts. Not only this is an unethical practice, but also it may be one of the reasons for the proven suboptimal quality of many animal researches. This is a widespread problem among investigations on various species of animals. However, it could be imagined that it may be more prevalent for the most common species of laboratory animals, such as the laboratory mice. In this review, proper anesthetic/analgesic methods for routine procedures on laboratory mice are discussed. We considered the available literature and critically reviewed their anesthetic/analgesic methods. Detailed dosing and pharmacological information for the relevant drugs are provided and some of the drugs' side effects are discussed. This paper provides the necessary data for an informed choice of anesthetic/analgesic methods in some routine procedures on laboratory mice.
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Affiliation(s)
- Siavash Ahmadi-Noorbakhsh
- grid.411705.60000 0001 0166 0922Preclinical Core Facility (TPCF), Tehran University of Medical Sciences, Tehran, Iran ,grid.415814.d0000 0004 0612 272XThe National Ethics Committee for Biomedical Research, Floor 13th, Complex A, Ministry of Health and Medical Education, Eyvanak Blvd., Shahrake Gharb, Tehran, Iran
| | - Mohammad Farajli Abbasi
- grid.412105.30000 0001 2092 9755Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Maedeh Ghasemi
- grid.411036.10000 0001 1498 685XDepartment of Physiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Gholamreza Bayat
- grid.411705.60000 0001 0166 0922Department of Physiology-Pharmacology-Medical Physic, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
| | - Nahid Davoodian
- grid.412237.10000 0004 0385 452XEndocrinology and Metabolism Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Ehsan Sharif-Paghaleh
- grid.411705.60000 0001 0166 0922Preclinical Core Facility (TPCF), Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran ,grid.13097.3c0000 0001 2322 6764Department of Imaging Chemistry and Biology, School of Biomedical Engineering and Imaging Sciences, Faculty of Life Sciences and Medicine, King’s College London, London, England
| | - Seyedeh Mahsa Poormoosavi
- grid.512425.50000 0004 4660 6569Department of Histology, School of Medicine, Research and Clinical Center for Infertility, Dezful University of Medical Sciences, Dezful, Iran
| | - Melika Rafizadeh
- grid.411600.2Department of Pharmacology, Medical School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Maleki
- grid.449129.30000 0004 0611 9408Department of Physiology, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
| | - Hesamaddin Shirzad-Aski
- grid.411747.00000 0004 0418 0096Infectious Diseases Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Hossein Kargar Jahromi
- grid.444764.10000 0004 0612 0898Research Center for Non-Communicable Disease, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Masoomeh Dadkhah
- grid.411426.40000 0004 0611 7226Pharmaceutical Sciences Research Center, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Bahman Khalvati
- grid.413020.40000 0004 0384 8939Medicinal Plants Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Tahereh Safari
- grid.488433.00000 0004 0612 8339School of Medicine, Department of Physiology, PhD, Zahedan University of Medical Sciences, Zahedan, Iran ,grid.488433.00000 0004 0612 8339Pharmacology Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Mohammad Amin Behmanesh
- grid.512425.50000 0004 4660 6569Department of Histology, School of Medicine, Dezful University of Medical Sciences, Dezful, Iran
| | - Seyed Esmaeil Khoshnam
- grid.411230.50000 0000 9296 6873Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Gholamreza Houshmand
- grid.411623.30000 0001 2227 0923Psychiatry and Behavioral Sciences Research Center, Addiction Institute, Department of Pharmacology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Sayyed Alireza Talaei
- grid.444768.d0000 0004 0612 1049Physiology Research Center, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
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Yeh CF, Huang WH, Lan MY, Hung W. Lipopolysaccharide-Initiated Rhinosinusitis Causes Neuroinflammation and Olfactory Dysfunction in Mice. Am J Rhinol Allergy 2022; 37:298-306. [PMID: 36426571 DOI: 10.1177/19458924221140965] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Background Olfactory dysfunction is a common disease and it may be caused by sinonasal inflammation, toxin inhalation, or neurological disorders. After sinonasal inflammation, if both olfactory neuroinflammation and olfactory dysfunction occur still under investigation. Objective This study aimed to investigate whether neuroinflammation and olfactory dysfunction occur after lipopolysaccharide (LPS)-initiated rhinosinusitis. Methods Adult C57BL/6 mice were intranasally administered with LPS for 3 weeks. The olfactory function was evaluated with a buried food test. The inflammatory status of sinonasal cavity and olfactory bulb was evaluated with histology and biochemistry. Results After 3-week LPS treatment, mice developed olfactory dysfunction, sinonasal cavity, and olfactory bulb inflammation. LPS-treated mice had greater sinonasal mucosal thickness. Besides, pro-inflammatory interleukin-6, the number of goblet cells and neutrophils in the sinonasal cavity was increased after LPS administration. The olfactory sensory neurons in the olfactory epithelium and the olfactory bulb were decreased, and the olfactory function was impaired by LPS administration. Inflammatory cytokines such as interferon-γ and tumor necrosis factor-α were increased in the olfactory bulb. Conclusion This study showed that LPS-initiated rhinosinusitis caused olfactory neuroinflammation and olfactory dysfunction in mice.
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Affiliation(s)
- Chien-Fu Yeh
- Department of Otorhinolaryngology–Head & Neck Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
- Department of Otolaryngology, National Yang Ming Chiao Tung University School of Medicine, Taipei, Taiwan
| | - Wei-Hao Huang
- Department of Otorhinolaryngology–Head & Neck Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Ming-Ying Lan
- Department of Otorhinolaryngology–Head & Neck Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
- Department of Otolaryngology, National Yang Ming Chiao Tung University School of Medicine, Taipei, Taiwan
| | - Wei Hung
- Department of Otorhinolaryngology–Head & Neck Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
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Greeson EM, Madsen CS, Makela AV, Contag CH. Magnetothermal Control of Temperature-Sensitive Repressors in Superparamagnetic Iron Nanoparticle-Coated Bacillus subtilis. ACS NANO 2022; 16:16699-16712. [PMID: 36200984 DOI: 10.1021/acsnano.2c06239] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Superparamagnetic iron oxide nanoparticles (SPIONs) are used as contrast agents in magnetic resonance imaging (MRI) and magnetic particle imaging (MPI), and resulting images can be used to guide magnetothermal heating. Alternating magnetic fields (AMF) cause local temperature increases in regions with SPIONs, and we investigated the ability of magnetic hyperthermia to regulate temperature-sensitive repressors (TSRs) of bacterial transcription. The TSR, TlpA39, was derived from a Gram-negative bacterium and used here for thermal control of reporter gene expression in Gram-positive, Bacillus subtilis. In vitro heating of B. subtilis with TlpA39 controlling bacterial luciferase expression resulted in a 14.6-fold (12 hours; h) and 1.8-fold (1 h) increase in reporter transcripts with a 10.0-fold (12 h) and 12.1-fold (1 h) increase in bioluminescence. To develop magnetothermal control, B. subtilis cells were coated with three SPION variations. Electron microscopy coupled with energy dispersive X-ray spectroscopy revealed an external association with, and retention of, SPIONs on B. subtilis. Furthermore, using long duration AMF we demonstrated magnetothermal induction of the TSRs in SPION-coated B. subtilis with a maximum of 5.6-fold increases in bioluminescence. After intramuscular injections of SPION-coated B. subtilis, histology revealed that SPIONs remained in the same locations as the bacteria. For in vivo studies, 1 h of AMF is the maximum exposure due to anesthesia constraints. Both in vitro and in vivo, there was no change in bioluminescence after 1 h of AMF treatment. Pairing TSRs with magnetothermal energy using SPIONs for localized heating with AMF can lead to transcriptional control that expands options for targeted bacteriotherapies.
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Affiliation(s)
- Emily M Greeson
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan 48824, United States
- Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, Michigan 48824, United States
| | - Cody S Madsen
- Department of Biomedical Engineering, Michigan State University, East Lansing, Michigan 48824, United States
- Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, Michigan 48824, United States
| | - Ashley V Makela
- Department of Biomedical Engineering, Michigan State University, East Lansing, Michigan 48824, United States
- Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, Michigan 48824, United States
| | - Christopher H Contag
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan 48824, United States
- Department of Biomedical Engineering, Michigan State University, East Lansing, Michigan 48824, United States
- Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, Michigan 48824, United States
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Wound healing in db/db mice with type 2 diabetes using non-contact exposure with an argon non-thermal atmospheric pressure plasma jet device. PLoS One 2022; 17:e0275602. [PMID: 36240146 PMCID: PMC9565687 DOI: 10.1371/journal.pone.0275602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 09/20/2022] [Indexed: 11/19/2022] Open
Abstract
A non-thermal atmospheric pressure plasma jet (APPJ) may stimulate cells and tissues or result in cell death depending on the intensity of plasma at the target; therefore, we herein investigated the effects of non-thermal plasma under non-contact conditions on the healing of full-thickness wounds in diabetic mice (DM+ group) and normal mice (DM- group). A hydrogen peroxide colorimetric method and high performance liquid chromatography showed that APPJ produced low amounts of reactive oxygen and nitrogen species. Ten-week-old male C57BL/6j mice with normal blood glucose levels (DM- group) and 10-week-old male C57BLKS/J Iar-+Leprdb/+Leprdb mice (DM+ group) received two full-thickness cutaneous wounds (4 mm in diameter) on both sides of the dorsum. Wounds were treated with or without the plasma jet or argon gas for 1 minute and were then covered with a hydrocolloid dressing (Hydrocolloid), according to which mice were divided into the following groups: DM+Plasma, DM+Argon, DM+Hydrocolloid, DM-Plasma, DM-Argon, and DM-Hydrocolloid. Exudate weights, wound areas, and wound area ratios were recorded every day. Hematoxylin and eosin staining was performed to assess re-epithelialization and α-SMA immunohistological staining to evaluate the formation of new blood vessels. Non-thermal plasma under non-contact conditions reduced the production of exudate. Exudate weights were smaller in the DM+Plasma group than in the DM+Hydrocolloid and DM+Argon groups. The wound area ratio was smaller for plasma-treated wounds, and was also smaller in the DM+Plasma group than in the DM+Hydrocolloid and DM+Argon groups on days 1-21 (p<0.01). Wound areas were smaller in the DM-Plasma group than in the DM-Argon group until day 14 and differences were significant on days 1-5 (p<0.01). The percentage of re-epithelialization was significantly higher in the DM+Plasma group than in the DM+Argon and DM+Hydrocolloid groups (p<0.01). The number of new blood vessels that had formed by day 7 was significantly higher in the DM+Plasma group than in the DM+Hydrocolloid and DM+Argon groups (p<0.05). These results indicate that treatment with the current non-thermal plasma APPJ device under non-contact conditions accelerated wound healing in diabetic mice.
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Favere K, Van Fraeyenhove J, Jacobs G, Bosman M, Eens S, De Sutter J, Miljoen H, Guns PJ, De Keulenaer GW, Segers VFM, Heidbuchel H. Cardiac electrophysiology studies in mice via the transjugular route: a comprehensive practical guide. Am J Physiol Heart Circ Physiol 2022; 323:H763-H773. [PMID: 36018757 DOI: 10.1152/ajpheart.00337.2022] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cardiac arrhythmias are associated with cardiovascular morbidity and mortality. Cardiac electrophysiology studies (EPS) use intracardiac catheter recording and stimulation for profound evaluation of the heart's electrical properties. The main clinical application is investigation and treatment of rhythm disorders. These techniques have been translated to the murine setting to open opportunities for detailed evaluation of the impact of different characteristics (including genetics) and interventions on cardiac electrophysiology and -pathology. Currently, a detailed description of the technique of murine transjugular EPS (which is the standard route of catheter introduction) is lacking. This article provides detailed information on EPS in mice via the transjugular route. This includes catheter placement, stimulation protocols, intracardiac tracing interpretation, artefact reduction and surface ECG recording. In addition, reference values as obtained in C57BL/6N mice are presented for common electrophysiological parameters. This detailed methodological description aims to increase accessibility and standardisation of EPS in mice. Ultimately, also human research and patient care may benefit from translation of the knowledge obtained in preclinical models using this technique.
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Affiliation(s)
- Kasper Favere
- Laboratory of Physiopharmacology, GENCOR, University of Antwerp, Antwerp, Belgium.,Research Group Cardiovascular Diseases, GENCOR, University of Antwerp, Antwerp, Belgium.,Department of Cardiology, Antwerp University Hospital, Antwerp, Belgium.,Department of Internal Medicine, Ghent University, Ghent, Belgium
| | - Jens Van Fraeyenhove
- Laboratory of Physiopharmacology, GENCOR, University of Antwerp, Antwerp, Belgium
| | - Griet Jacobs
- Laboratory of Physiopharmacology, GENCOR, University of Antwerp, Antwerp, Belgium
| | - Matthias Bosman
- Laboratory of Physiopharmacology, GENCOR, University of Antwerp, Antwerp, Belgium
| | - Sander Eens
- Laboratory of Physiopharmacology, GENCOR, University of Antwerp, Antwerp, Belgium.,Research Group Cardiovascular Diseases, GENCOR, University of Antwerp, Antwerp, Belgium
| | - Johan De Sutter
- Department of Internal Medicine, Ghent University, Ghent, Belgium
| | - Hielko Miljoen
- Department of Cardiology, Antwerp University Hospital, Antwerp, Belgium
| | - Pieter-Jan Guns
- Laboratory of Physiopharmacology, GENCOR, University of Antwerp, Antwerp, Belgium
| | - Gilles W De Keulenaer
- Laboratory of Physiopharmacology, GENCOR, University of Antwerp, Antwerp, Belgium.,Department of Cardiology, ZNA Middelheim Hospital, Antwerp, Belgium
| | - Vincent F M Segers
- Laboratory of Physiopharmacology, GENCOR, University of Antwerp, Antwerp, Belgium.,Research Group Cardiovascular Diseases, GENCOR, University of Antwerp, Antwerp, Belgium.,Department of Cardiology, Antwerp University Hospital, Antwerp, Belgium
| | - Hein Heidbuchel
- Research Group Cardiovascular Diseases, GENCOR, University of Antwerp, Antwerp, Belgium.,Department of Cardiology, Antwerp University Hospital, Antwerp, Belgium
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Ribeiro FM, Correia PMM, Santos AC, Veloso JFCA. A guideline proposal for mice preparation and care in 18F-FDG PET imaging. EJNMMI Res 2022; 12:49. [PMID: 35962869 PMCID: PMC9375789 DOI: 10.1186/s13550-022-00921-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 07/31/2022] [Indexed: 11/28/2022] Open
Abstract
The experimental outcomes of small-animal positron emission tomography (PET) imaging with 18F-labelled fluorodeoxyglucose (18F-FDG) can be particularly compromised by animal preparation and care. Several works intend to improve research reporting and amplify the quality and reliability of published research. Though these works provide valuable information to plan and conduct animal studies, manuscripts describe different methodologies—standardization does not exist. Consequently, the variation in details reported can explain the difference in the experimental results found in the literature. Additionally, the resources and guidelines defining protocols for small-animal imaging are scarce, making it difficult for researchers to obtain and compare accurate and reproducible data. Considering the selection of suitable procedures key to ensure animal welfare and research improvement, this paper aims to prepare the way for a future guideline on mice preparation and care for PET imaging with 18F-FDG. For this purpose, a global standard protocol was created based on recommendations and good practices described in relevant literature.
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Affiliation(s)
- F M Ribeiro
- Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), Department of Physics, University of Aveiro (DFis-UA), 3810-193, Aveiro, Portugal.
| | - P M M Correia
- Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), Department of Physics, University of Aveiro (DFis-UA), 3810-193, Aveiro, Portugal
| | - A C Santos
- Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine of the University of Coimbra (FMUC), Area of Environment Genetics and Oncobiology (CIMAGO), Center for Innovative Biomedicine and Biotechnology (CIBB), 3000-548, Coimbra, Portugal
| | - J F C A Veloso
- Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), Department of Physics, University of Aveiro (DFis-UA), 3810-193, Aveiro, Portugal
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Oliveira RG, Correia PMM, Silva ALM, Encarnação PMCC, Ribeiro FM, Castro IF, Veloso JFCA. Development of a New Integrated System for Vital Sign Monitoring in Small Animals. SENSORS 2022; 22:s22114264. [PMID: 35684885 PMCID: PMC9185494 DOI: 10.3390/s22114264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/22/2022] [Accepted: 06/01/2022] [Indexed: 01/25/2023]
Abstract
Monitoring the vital signs of mice is an essential practice during imaging procedures to avoid populational losses and improve image quality. For this purpose, a system based on a set of devices (piezoelectric sensor, optical module and thermistor) able to detect the heart rate, respiratory rate, body temperature and arterial blood oxygen saturation (SpO2) in mice anesthetized with sevoflurane was implemented. Results were validated by comparison with the reported literature on similar anesthetics. A new non-invasive electrocardiogram (ECG) module was developed, and its first results reflect the viability of its integration in the system. The sensors were strategically positioned on mice, and the signals were acquired through a custom-made printed circuit board during imaging procedures with a micro-PET (Positron Emission Tomography). For sevoflurane concentration of 1.5%, the average values obtained were: 388 bpm (beats/minute), 124 rpm (respirations/minute) and 88.9% for the heart rate, respiratory rate and SpO2, respectively. From the ECG information, the value obtained for the heart rate was around 352 bpm for injectable anesthesia. The results compare favorably to the ones established in the literature, proving the reliability of the proposed system. The ECG measurements show its potential for mice heart monitoring during imaging acquisitions and thus for integration into the developed system.
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Affiliation(s)
- Regina G. Oliveira
- Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal; (R.G.O.); (A.L.M.S.); (P.M.C.C.E.); (F.M.R.); (J.F.C.A.V.)
| | - Pedro M. M. Correia
- Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal; (R.G.O.); (A.L.M.S.); (P.M.C.C.E.); (F.M.R.); (J.F.C.A.V.)
- Correspondence:
| | - Ana L. M. Silva
- Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal; (R.G.O.); (A.L.M.S.); (P.M.C.C.E.); (F.M.R.); (J.F.C.A.V.)
| | - Pedro M. C. C. Encarnação
- Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal; (R.G.O.); (A.L.M.S.); (P.M.C.C.E.); (F.M.R.); (J.F.C.A.V.)
| | - Fabiana M. Ribeiro
- Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal; (R.G.O.); (A.L.M.S.); (P.M.C.C.E.); (F.M.R.); (J.F.C.A.V.)
| | - Ismael F. Castro
- Radiation Imaging Technologies Lda. (RI-TE), University of Aveiro Incubator, PCI—Creative Science Park, 3830-352 Ílhavo, Portugal;
| | - João F. C. A. Veloso
- Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal; (R.G.O.); (A.L.M.S.); (P.M.C.C.E.); (F.M.R.); (J.F.C.A.V.)
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Peiser-Oliver JM, Evans S, Adams DJ, Christie MJ, Vandenberg RJ, Mohammadi SA. Glycinergic Modulation of Pain in Behavioral Animal Models. Front Pharmacol 2022; 13:860903. [PMID: 35694265 PMCID: PMC9174897 DOI: 10.3389/fphar.2022.860903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 04/19/2022] [Indexed: 11/16/2022] Open
Abstract
Animal models of human pain conditions allow for detailed interrogation of known and hypothesized mechanisms of pain physiology in awake, behaving organisms. The importance of the glycinergic system for pain modulation is well known; however, manipulation of this system to treat and alleviate pain has not yet reached the sophistication required for the clinic. Here, we review the current literature on what animal behavioral studies have allowed us to elucidate about glycinergic pain modulation, and the progress toward clinical treatments so far. First, we outline the animal pain models that have been used, such as nerve injury models for neuropathic pain, chemogenic pain models for acute and inflammatory pain, and other models that mimic painful human pathologies such as diabetic neuropathy. We then discuss the genetic approaches to animal models that have identified the crucial glycinergic machinery involved in neuropathic and inflammatory pain. Specifically, two glycine receptor (GlyR) subtypes, GlyRα1(β) and GlyRα3(β), and the two glycine transporters (GlyT), GlyT1 and GlyT2. Finally, we review the different pharmacological approaches to manipulating the glycinergic system for pain management in animal models, such as partial vs. full agonism, reversibility, and multi-target approaches. We discuss the benefits and pitfalls of using animal models in drug development broadly, as well as the progress of glycinergic treatments from preclinical to clinical trials.
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Affiliation(s)
| | - Sally Evans
- School of Medical Sciences, The University of Sydney, Sydney, NSW, Australia
| | - David J. Adams
- Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, NSW, Australia
| | | | | | - Sarasa A. Mohammadi
- School of Medical Sciences, The University of Sydney, Sydney, NSW, Australia
- *Correspondence: Sarasa A. Mohammadi,
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Osaka N, Mori Y, Terasaki M, Hiromura M, Saito T, Yashima H, Shiraga Y, Kawakami R, Ohara M, Fukui T, Yamagishi SI. Luseogliflozin inhibits high glucose-induced TGF- β2 expression in mouse cardiomyocytes by suppressing NHE-1 activity. J Int Med Res 2022; 50:3000605221097490. [PMID: 35510669 PMCID: PMC9082751 DOI: 10.1177/03000605221097490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objective Sodium-glucose cotransporter-2 (SGLT2) inhibitors exhibit cardioprotective properties in patients with diabetes. However, SGLT2 is not expressed in the heart, and the underlying molecular mechanisms are not fully understood. We investigated whether the SGLT2 inhibitor luseogliflozin exerts beneficial effects on high glucose-exposed cardiomyocytes via the suppression of sodium-hydrogen exchanger-1 (NHE-1) activity. Methods Mouse cardiomyocytes were incubated under normal or high glucose conditions with vehicle, luseogliflozin, or the NHE-1 inhibitor cariporide. NHE-1 activity and gene expression were evaluated by the SNARF assay and real-time reverse transcription-polymerase chain reaction (RT-PCR) analysis, respectively. Six-week-old male db/db mice were treated with vehicle or luseogliflozin for 6 weeks, and the hearts were collected for histological, RT-PCR, and western blot analyses. Results High glucose increased NHE-1 activity and transforming growth factor (Tgf)-β2 mRNA levels in cardiomyocytes, both of which were inhibited by luseogliflozin or cariporide, whereas their combination showed no additive suppression of Tgf-β2 mRNA levels. Luseogliflozin attenuated cardiac hypertrophy and fibrosis in db/db mice in association with decreased mRNA and protein levels of TGF-β2. Conclusions Luseogliflozin may suppress cardiac hypertrophy in diabetes by reducing Tgf-β2 expression in cardiomyocytes via the suppression of NHE-1 activity.
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Affiliation(s)
- Naoya Osaka
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Shinagawa, Tokyo, Japan
| | - Yusaku Mori
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Anti-glycation Research Section, Showa University School of Medicine, Shinagawa, Tokyo, Japan
| | - Michishige Terasaki
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Shinagawa, Tokyo, Japan
| | - Munenori Hiromura
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Shinagawa, Tokyo, Japan
| | - Tomomi Saito
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Shinagawa, Tokyo, Japan
| | - Hironori Yashima
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Shinagawa, Tokyo, Japan
| | - Yoshie Shiraga
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Shinagawa, Tokyo, Japan
| | - Raichi Kawakami
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Shinagawa, Tokyo, Japan
| | - Makoto Ohara
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Shinagawa, Tokyo, Japan
| | - Tomoyasu Fukui
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Shinagawa, Tokyo, Japan
| | - Sho-Ichi Yamagishi
- Department of Medicine, Division of Diabetes, Metabolism, and Endocrinology, Showa University School of Medicine, Shinagawa, Tokyo, Japan
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