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Panara V, Varaliová Z, Wilting J, Koltowska K, Jeltsch M. The relationship between the secondary vascular system and the lymphatic vascular system in fish. Biol Rev Camb Philos Soc 2024. [PMID: 38940420 DOI: 10.1111/brv.13114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 06/14/2024] [Accepted: 06/17/2024] [Indexed: 06/29/2024]
Abstract
New technologies have resulted in a better understanding of blood and lymphatic vascular heterogeneity at the cellular and molecular levels. However, we still need to learn more about the heterogeneity of the cardiovascular and lymphatic systems among different species at the anatomical and functional levels. Even the deceptively simple question of the functions of fish lymphatic vessels has yet to be conclusively answered. The most common interpretation assumes a similar dual setup of the vasculature in zebrafish and mammals: a cardiovascular circulatory system, and a lymphatic vascular system (LVS), in which the unidirectional flow is derived from surplus interstitial fluid and returned into the cardiovascular system. A competing interpretation questions the identity of the lymphatic vessels in fish as at least some of them receive their flow from arteries via specialised anastomoses, neither requiring an interstitial source for the lymphatic flow nor stipulating unidirectionality. In this alternative view, the 'fish lymphatics' are a specialised subcompartment of the cardiovascular system, called the secondary vascular system (SVS). Many of the contradictions found in the literature appear to stem from the fact that the SVS develops in part or completely from an embryonic LVS by transdifferentiation. Future research needs to establish the extent of embryonic transdifferentiation of lymphatics into SVS blood vessels. Similarly, more insight is needed into the molecular regulation of vascular development in fish. Most fish possess more than the five vascular endothelial growth factor (VEGF) genes and three VEGF receptor genes that we know from mice or humans, and the relative tolerance of fish to whole-genome and gene duplications could underlie the evolutionary diversification of the vasculature. This review discusses the key elements of the fish lymphatics versus the SVS and attempts to draw a picture coherent with the existing data, including phylogenetic knowledge.
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Affiliation(s)
- Virginia Panara
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Dag Hammarskjölds väg 20, Uppsala, 751 85, Sweden
- Beijer Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Dag Hammarskjölds väg 20, Uppsala, 751 85, Sweden
- Department of Organismal Biology, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18 A, Uppsala, 752 36, Sweden
| | - Zuzana Varaliová
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Dag Hammarskjölds väg 20, Uppsala, 751 85, Sweden
- Drug Research Program, University of Helsinki, Viikinkaari 5E, Helsinki, 00790, Finland
| | - Jörg Wilting
- Institute of Anatomy and Embryology, University Medical School Göttingen, Kreuzbergring 36, Göttingen, 37075, Germany
| | - Katarzyna Koltowska
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Dag Hammarskjölds väg 20, Uppsala, 751 85, Sweden
- Beijer Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Dag Hammarskjölds väg 20, Uppsala, 751 85, Sweden
| | - Michael Jeltsch
- Drug Research Program, University of Helsinki, Viikinkaari 5E, Helsinki, 00790, Finland
- Individualized Drug Therapy Research Program, University of Helsinki, Haartmaninkatu 8, Helsinki, 00290, Finland
- Wihuri Research Institute, Haartmaninkatu 8, Helsinki, 00290, Finland
- Helsinki One Health, University of Helsinki, P.O. Box 4, Helsinki, 00014, Finland
- Helsinki Institute of Sustainability Science, Yliopistonkatu 3, Helsinki, 00100, Finland
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2
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Kröner L, Lötters S, Hopp MT. Insights into caudate amphibian skin secretions with a focus on the chemistry and bioactivity of derived peptides. Biol Chem 2024; 0:hsz-2024-0035. [PMID: 38766708 DOI: 10.1515/hsz-2024-0035] [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: 02/28/2024] [Accepted: 05/06/2024] [Indexed: 05/22/2024]
Abstract
Amphibians are well-known for their ability to produce and secrete a mixture of bioactive substances in specialized skin glands for the purpose of antibiotic self-protection and defense against predators. Some of these secretions contain various small molecules, such as the highly toxic batrachotoxin, tetrodotoxin, and samandarine. For some time, the presence of peptides in amphibian skin secretions has attracted researchers, consisting of a diverse collection of - to the current state of knowledge - three to 104 amino acid long sequences. From these more than 2000 peptides many are known to exert antimicrobial effects. In addition, there are some reports on amphibian skin peptides that can promote wound healing, regulate immunoreactions, and may serve as antiparasitic and antioxidative substances. So far, the focus has mainly been on skin peptides from frogs and toads (Anura), eclipsing the research on skin peptides of the ca. 700 salamanders and newts (Caudata). Just recently, several novel observations dealing with caudate peptides and their structure-function relationships were reported. This review focuses on the chemistry and bioactivity of caudate amphibian skin peptides and their potential as novel agents for clinical applications.
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Affiliation(s)
- Lorena Kröner
- Department of Chemistry, Institute for Integrated Natural Sciences, 38899 University of Koblenz , D-56070 Koblenz, Germany
| | - Stefan Lötters
- Department of Biogeography, University of Trier, D-54286 Trier, Germany
| | - Marie-T Hopp
- Department of Chemistry, Institute for Integrated Natural Sciences, 38899 University of Koblenz , D-56070 Koblenz, Germany
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3
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Parkinson L. Fluid Therapy in Exotic Animal Emergency and Critical Care. Vet Clin North Am Exot Anim Pract 2023:S1094-9194(23)00022-1. [PMID: 37308371 DOI: 10.1016/j.cvex.2023.05.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Many new concepts are emerging in the understanding of fluid therapy in human and mammalian medicine, including the role of the glycocalyx, increased understanding of fluid, sodium, and chloride overload, and the advantages of colloid administration in the form of albumin. None of these concepts, however, appear to be directly applicable to non-mammalian exotic patients, and careful consideration of their alternate physiology is required when formulating fluid plans for these patients.
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Affiliation(s)
- Lily Parkinson
- Brookfield Zoo, Chicago Zoological Society, 3300 Golf Road, Brookfield, IL 60513, USA.
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4
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Banda CH, Shiraishi M, Mitsui K, Okada Y, Danno K, Ishiura R, Maemura K, Chiba C, Mizoguchi A, Imanaka-Yoshida K, Maruyama K, Narushima M. Structural and functional analysis of the newt lymphatic system. Sci Rep 2023; 13:6902. [PMID: 37106059 PMCID: PMC10140069 DOI: 10.1038/s41598-023-34169-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 04/25/2023] [Indexed: 04/29/2023] Open
Abstract
Regeneration competent vertebrates such as newts and salamanders possess a weakened adaptive immune system characterized by multiple connections between the lymphatic system and the blood vascular system called lymphatic hearts. The role of lymphatic vasculature and these lymphaticovenous connections in regeneration is unknown. We used in-vivo near-infrared lymphangiography, ultra-high frequency ultrasonography, micro-CT lymphangiography, and histological serial section 3-dimentional computer reconstruction to evaluate the lymphatic territories of Cynops pyrrhogaster. We used our model and supermicrosurgery to show that lymphatic hearts are not essential for lymphatic circulation and limb regeneration. Instead, newts possess a novel intraosseous network of lymphatics inside the bone expressing VEGFR-3, LYVE-1 and CD-31. However, we were unable to show Prox-1 expression by these vessels. We demonstrate that adult newt bone marrow functions as both a lymphatic drainage organ and fat reservoir. This study reveals the fundamental anatomical differences between the immune system of urodeles and mammals and provides a model for investigating lymphatics and regeneration.
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Affiliation(s)
- Chihena H Banda
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan
| | - Makoto Shiraishi
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan
| | - Kohei Mitsui
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan
| | - Yoshimoto Okada
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan
| | - Kanako Danno
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan
| | - Ryohei Ishiura
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan
| | - Kaho Maemura
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan
| | - Chikafumi Chiba
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki Prefecture, 305-8571, Japan
| | - Akira Mizoguchi
- Department of Personalized Cancer Immunotherapy, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan
| | - Kyoko Imanaka-Yoshida
- Department of Pathology and Matrix Biology, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan
| | - Kazuaki Maruyama
- Department of Pathology and Matrix Biology, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan
| | - Mitsunaga Narushima
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Mie University, 2-174 Edobashi, Tsu, Mie Prefecture, 514-8507, Japan.
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5
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van Schaik CJ, Boer LL, Draaisma JMT, van der Vleuten CJM, Janssen JJ, Fütterer JJ, Schultze Kool LJ, Klein WM. The lymphatic system throughout history: From hieroglyphic translations to state of the art radiological techniques. Clin Anat 2022; 35:701-710. [PMID: 35383381 PMCID: PMC9542037 DOI: 10.1002/ca.23867] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 02/22/2022] [Accepted: 03/24/2022] [Indexed: 11/07/2022]
Abstract
A comprehensive lymphatic system is indispensable for a well-functioning body; it is integral to the immune system and is also interrelated with the digestive system and fluid homeostasis. The main difficulty in examining the lymphatic system is its fine-meshed structure. This remains a challenge, leaving patients with uninterpreted symptoms and a dearth of potential therapies. We review the history of the lymphatic system up to the present with the aim of improving current knowledge. Several findings described throughout history have made fundamental contributions to elucidating the lymphatic system. The first contributions were made by the ancient Egyptians and the ancient Greeks. Vesalius obtained new insights by dissecting corpses. Thereafter, Ruysch (1638-1731) gained an understanding of lymphatic flow. In 1784, Mascagni published his illustration of the whole lymphatic network. The introduction of radiological lymphography revolutionized knowledge of the lymphatic system. Pedal lymphangiography was first described by Monteiro (1931) and Kinmonth (1952). Lymphoscintigraphy (nuclear medicine), magnetic resonance imaging, and near-infrared fluorescence lymphography further improved visualization of the lymphatic system. The innovative dynamic contrast-enhanced magnetic resonance lymphangiography (DCMRL) transformed understanding of the central lymphatic system, enabling central lymphatic flow disorders in patients to be diagnosed and even allowing for therapeutic planning. From the perspective of the history of lymph visualization, DCMRL has ample potential for identifying specific causes of debilitating symptoms in patients with central lymphatic system abnormalities and even allows for therapeutic planning.
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Affiliation(s)
- Caroline J van Schaik
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Lucas L Boer
- Department of Medical Imaging, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Jos M T Draaisma
- Department of General Pediatrics, Radboud University Medical Centre, Nijmegen, The Netherlands
| | | | - Jan Jaap Janssen
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jurgen J Fütterer
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Leo J Schultze Kool
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Willemijn M Klein
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, The Netherlands
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6
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Dunton AD, Göpel T, Ho DH, Burggren W. Form and Function of the Vertebrate and Invertebrate Blood-Brain Barriers. Int J Mol Sci 2021; 22:ijms222212111. [PMID: 34829989 PMCID: PMC8618301 DOI: 10.3390/ijms222212111] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 10/23/2021] [Accepted: 10/28/2021] [Indexed: 12/25/2022] Open
Abstract
The need to protect neural tissue from toxins or other substances is as old as neural tissue itself. Early recognition of this need has led to more than a century of investigation of the blood-brain barrier (BBB). Many aspects of this important neuroprotective barrier have now been well established, including its cellular architecture and barrier and transport functions. Unsurprisingly, most research has had a human orientation, using mammalian and other animal models to develop translational research findings. However, cell layers forming a barrier between vascular spaces and neural tissues are found broadly throughout the invertebrates as well as in all vertebrates. Unfortunately, previous scenarios for the evolution of the BBB typically adopt a classic, now discredited 'scala naturae' approach, which inaccurately describes a putative evolutionary progression of the mammalian BBB from simple invertebrates to mammals. In fact, BBB-like structures have evolved independently numerous times, complicating simplistic views of the evolution of the BBB as a linear process. Here, we review BBBs in their various forms in both invertebrates and vertebrates, with an emphasis on the function, evolution, and conditional relevance of popular animal models such as the fruit fly and the zebrafish to mammalian BBB research.
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Affiliation(s)
- Alicia D. Dunton
- Developmental Integrative Biology Group, Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA; (T.G.); (W.B.)
- Correspondence:
| | - Torben Göpel
- Developmental Integrative Biology Group, Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA; (T.G.); (W.B.)
| | - Dao H. Ho
- Department of Clinical Investigation, Tripler Army Medical Center, Honolulu, HI 96859, USA;
| | - Warren Burggren
- Developmental Integrative Biology Group, Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA; (T.G.); (W.B.)
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7
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An Evaluation of Immersive and Handling Methods for Collecting Salamander Skin Peptides. J HERPETOL 2021. [DOI: 10.1670/20-122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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8
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Evolution and medicine - The central role of anatomy. Ann Anat 2021; 239:151809. [PMID: 34324995 DOI: 10.1016/j.aanat.2021.151809] [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: 10/13/2020] [Revised: 06/10/2021] [Accepted: 07/13/2021] [Indexed: 11/24/2022]
Abstract
In medicine, there is an increasing number of publications that deal with or at least consider an evolutionary background. In zoology or comparative anatomy, work on evolutionary developments is taking on an ever-greater role in parallel. The pre-clinical (or pre-medical) phase in medical studies would be able to form a bridge between these related and yet so distant subjects but is currently completely evolution-free. This means that there is no consideration of the evolution of the healthy human being as a prerequisite for a systematic study of the evolutionary background in medicine. In this work the view is expressed that anatomy should be given a central, framework-giving and integrating role, which should urgently be actively pursued.
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9
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Dixon BC, Culbreth MJ, Kumsher DM, Carbaugh CM, Fetterer DP, Reiter CP. Mid-Tibiofibular Amputation as a Method of Terminal Blood Collection in Xenopus Laevis. JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE 2021; 60:582-586. [PMID: 34266520 DOI: 10.30802/aalas-jaalas-21-000005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The African clawed frog, Xenopus laevis, is a widely used model for biomedical research. X. laevis could be more useful as a model with a better method for collection and analysis of its blood and serum. However, blood collection in X. laevis can be challenging due to their small size, lack of peripheral vascular access, and species-specific hematology variables. The goal of this study was to compare cardiocentesis, the current gold standard terminal blood collection method, with a leg amputation technique. Blood samples were collected from 24 laboratory-reared X. laevis, randomized to either the cardiocentesis or leg amputation method, with 6 males and 6 females in each group. Hematology and serum biochemistry were also conducted to identify any lymph contamination in the samples. The leg amputation method produced significantly higher blood volumes in shorter times and showed no significant differences in clinical pathology parameters as compared with cardiocentesis. These results indicate that blood collection by leg amputation may be a valuable approach for increasing the utility of an already valuable biomedical research model.
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10
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Hsu M, Laaker C, Sandor M, Fabry Z. Neuroinflammation-Driven Lymphangiogenesis in CNS Diseases. Front Cell Neurosci 2021; 15:683676. [PMID: 34248503 PMCID: PMC8261156 DOI: 10.3389/fncel.2021.683676] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 05/05/2021] [Indexed: 11/13/2022] Open
Abstract
The central nervous system (CNS) undergoes immunosurveillance despite the lack of conventional antigen presenting cells and lymphatic vessels in the CNS parenchyma. Additionally, the CNS is bathed in a cerebrospinal fluid (CSF). CSF is continuously produced, and consequently must continuously clear to maintain fluid homeostasis despite the lack of conventional lymphatics. During neuroinflammation, there is often an accumulation of fluid, antigens, and immune cells to affected areas of the brain parenchyma. Failure to effectively drain these factors may result in edema, prolonged immune response, and adverse clinical outcome as observed in conditions including traumatic brain injury, ischemic and hypoxic brain injury, CNS infection, multiple sclerosis (MS), and brain cancer. Consequently, there has been renewed interest surrounding the expansion of lymphatic vessels adjacent to the CNS which are now thought to be central in regulating the drainage of fluid, cells, and waste out of the CNS. These lymphatic vessels, found at the cribriform plate, dorsal dural meninges, base of the brain, and around the spinal cord have each been implicated to have important roles in various CNS diseases. In this review, we discuss the contribution of meningeal lymphatics to these processes during both steady-state conditions and neuroinflammation, as well as discuss some of the many still unknown aspects regarding the role of meningeal lymphatics in neuroinflammation. Specifically, we focus on the observed phenomenon of lymphangiogenesis by a subset of meningeal lymphatics near the cribriform plate during neuroinflammation, and discuss their potential roles in immunosurveillance, fluid clearance, and access to the CSF and CNS compartments. We propose that manipulating CNS lymphatics may be a new therapeutic way to treat CNS infections, stroke, and autoimmunity.
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Affiliation(s)
- Martin Hsu
- Neuroscience Training Program, University of Wisconsin Madison, Madison, WI, United States
| | - Collin Laaker
- Neuroscience Training Program, University of Wisconsin Madison, Madison, WI, United States
| | - Matyas Sandor
- Department of Pathology and Laboratory Medicine, University of Wisconsin Madison, Madison, WI, United States
| | - Zsuzsanna Fabry
- Department of Pathology and Laboratory Medicine, University of Wisconsin Madison, Madison, WI, United States
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11
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Hillman SS, Drewes RC, Hedrick MS. Control of blood volume following hypovolemic challenge in vertebrates: Transcapillary versus lymphatic mechanisms. Comp Biochem Physiol A Mol Integr Physiol 2021; 254:110878. [DOI: 10.1016/j.cbpa.2020.110878] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/16/2020] [Accepted: 12/17/2020] [Indexed: 11/26/2022]
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12
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Little AG, Pamenter ME, Sitaraman D, Templeman NM, Willmore WG, Hedrick MS, Moyes CD. WITHDRAWN: Utilizing comparative models in biomedical research. Comp Biochem Physiol A Mol Integr Physiol 2021; 256:110938. [PMID: 33737041 DOI: 10.1016/j.cbpa.2021.110938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The Publisher regrets that this article is an accidental duplication of an article that has already been published in Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, Volume 255, 2021, 110593, https://doi.org/10.1016/j.cbpb.2021.110593. The duplicate article has therefore been withdrawn.
The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal.
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Affiliation(s)
| | | | - Divya Sitaraman
- Department of Psychology, California State University, East Bay, Hayward, CA, USA
| | | | | | - Michael S Hedrick
- Department of Biological Sciences, California State University, East Bay, Hayward, CA, USA.
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13
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Little AG, Pamenter ME, Sitaraman D, Templeman NM, Willmore WG, Hedrick MS, Moyes CD. Utilizing comparative models in biomedical research. Comp Biochem Physiol B Biochem Mol Biol 2021; 255:110593. [PMID: 33779562 DOI: 10.1016/j.cbpb.2021.110593] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This review serves as an introduction to a Special Issue of Comparative Biochemistry and Physiology, focused on using non-human models to study biomedical physiology. The concept of a model differs across disciplines. For example, several models are used primarily to gain an understanding of specific human pathologies and disease states, whereas other models may be focused on gaining insight into developmental or evolutionary mechanisms. It is often the case that animals initially used to gain knowledge of some unique biochemical or physiological process finds foothold in the biomedical community and becomes an established model. The choice of a particular model for biomedical research is an ongoing process and model validation must keep pace with existing and emerging technologies. While the importance of non-mammalian models, such as Caenorhabditis elegans, Drosophila melanogaster, Danio rerio and Xenopus laevis, is well known, we also seek to bring attention to emerging alternative models of both invertebrates and vertebrates, which are less established but of interest to the comparative biochemistry and physiology community.
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Affiliation(s)
| | | | - Divya Sitaraman
- Department of Psychology, California State University, East Bay, Hayward, CA, USA
| | | | | | - Michael S Hedrick
- Department of Biological Sciences, California State University, East Bay, Hayward, CA, USA
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14
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Cichocka JM, Bielecki A, Świątek P, Jabłońska-Barna I, Kobak J, Hildebrand J, Dmitryjuk M, Strużyński W, Rost-Roszkowska M. The activity of hydrolytic enzymes in the digestive system of Acanthobdellida, Branchiobdellida and Hirudinida (Annelida, Clitellata) – considerations on similarity and phylogeny. THE EUROPEAN ZOOLOGICAL JOURNAL 2021. [DOI: 10.1080/24750263.2020.1851402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- J. M. Cichocka
- Department of Zoology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
- XI High School, Olsztyn, Poland
| | - A. Bielecki
- Department of Zoology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - P. Świątek
- Faculty of Natural Sciences, Institute of Biology, Biotechnology and Environmental Protection, University of Silesia in Katowice, Katowice, Poland
| | - I. Jabłońska-Barna
- Department of Tourism, Recreation and Ecology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - J. Kobak
- Department of Invertebrate Zoology and Parasitology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, Toruń, Poland
| | - J. Hildebrand
- Department of Parasitology, Institute of Genetics and Microbiology, University of Wrocław, Wrocław, Poland
| | - M. Dmitryjuk
- Department of Biochemistry, Faculty of Biology and Biotechnology, University of Warmia and Mazury, Olsztyn, Poland
| | - W. Strużyński
- Department of Animal Environment Biology, Institute of Animal Sciences, Warsaw University of Life Sciences, Warsaw, Poland
| | - M. Rost-Roszkowska
- Faculty of Natural Sciences, Institute of Biology, Biotechnology and Environmental Protection, University of Silesia in Katowice, Katowice, Poland
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15
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Bernard C, Compagnoni A, Salguero‐Gómez R. Testing Finch's hypothesis: The role of organismal modularity on the escape from actuarial senescence. Funct Ecol 2020. [DOI: 10.1111/1365-2435.13486] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Aldo Compagnoni
- Martin Luther University Halle‐Wittenberg German Centre for Integrative Biodiversity Research Leipzig Germany
| | - Roberto Salguero‐Gómez
- Department of Zoology University of Oxford Oxford UK
- Centre for Biodiversity and Conservation Science University of Queensland St. Lucia QLD Australia
- Evolutionary Demography laboratory Max Plank Institute for Demographic Research Rostock Germany
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16
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Cardiovascular and ventilatory interactions in the facultative air-breathing teleost Pangasianodon hypophthalmus. J Comp Physiol B 2019; 189:425-440. [DOI: 10.1007/s00360-019-01225-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 05/20/2019] [Accepted: 06/24/2019] [Indexed: 02/07/2023]
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17
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Hillman SS. Anuran amphibians as comparative models for understanding extreme dehydration tolerance: a unique negative feedback lymphatic mechanism for blood volume regulation. Am J Physiol Regul Integr Comp Physiol 2018; 315:R790-R798. [PMID: 29874095 DOI: 10.1152/ajpregu.00160.2018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Anurans are the most terrestrial order of amphibians. Couple the high driving forces for evaporative loss in terrestrial environments and their low resistance to evaporation, dehydration is an inevitable stress on their water balance. Anurans have the greatest tolerances for dehydration of any vertebrate group. Some species can tolerate evaporative losses up to 45% of their standard body mass. Anurans have remarkable capacities to regulate blood volume with hemorrhage and dehydration compared with mammals. Stabilization of blood volume is central to extending dehydration tolerance, since it avoids both the hypovolemic and hyperviscosity stresses on cardiac output and its consequential effects on aerobic capacity. Anurans, in contrast to mammals, seem incapable of generating a sufficient pressure difference, either oncotically or via interstitial compliance, to move fluid from the interstitium into the capillaries. Couple this inability to generate a sufficient pressure difference for transvascular uptake to a circulatory system with high filtration coefficients and a high rate of plasma turnover is the consequence. The novel lymphatic system of anurans is critical to a remarkable capacity for blood volume regulation. This review summarizes what is known about the anatomical and physiological specializations that are involved in explaining differential blood volume regulation and dehydration tolerance involving a true centrally mediated negative feedback of lymphatic function involving baroreceptors as sensors and lymph hearts, arginine vasotocin, pulmonary ventilation and specialized skeletal muscles as effectors.
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18
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Genomic signatures of parasite-driven natural selection in north European Atlantic salmon (Salmo salar). Mar Genomics 2018; 39:26-38. [DOI: 10.1016/j.margen.2018.01.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 12/16/2017] [Accepted: 01/08/2018] [Indexed: 02/06/2023]
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19
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Kreutzer C, Kreutzer G. The Lymphatic System: The Achilles Heel of the Fontan-Kreutzer Circulation. World J Pediatr Congenit Heart Surg 2017; 8:613-623. [DOI: 10.1177/2150135117720685] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In spite of excellent long term survival the Fontan Kreutzer procedure commonly presents late failure due to end-organ damage. Several advances have been described to refine single ventricle management and surgical techniques. However, very little research has been dedicated to the lymphatic circulation in the precarious Fontan hemodynamic state. The lymphatic circulation is clearly affected since there is increased lymph production, which requires to be drained at a similar or higher pressure than it is produced, commonly resulting in chronic lymphedema. Chronic lymphedema induces fibrosis and end-organ failure even in normal circulation. Diverting lymph drainage to the low-pressured systemic atrium in Fontan may represent a valid alternative for the treatment of devastating complications as protein-losing enteropathy and plastic bronchitis and may prevent or decrease the development of end-organ fibrosis or failure.
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Affiliation(s)
- Christian Kreutzer
- Division of Pediatric Cardiovascular Surgery, Hospital Universitario Austral, Pilar, Buenos Aires, Argentina
| | - Guillermo Kreutzer
- Division of Pediatric Cardiovascular Surgery, Clinica Bazterrica, Ciudad Autonoma de Buenos Aires, Buenos Aires, Argentina
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Williams CJ, Alstrup AK, Bertelsen MF, Jensen HM, Leite CA, Wang T. When local anesthesia becomes universal: Pronounced systemic effects of subcutaneous lidocaine in bullfrogs ( Lithobates catesbeianus ). Comp Biochem Physiol A Mol Integr Physiol 2017; 209:41-46. [DOI: 10.1016/j.cbpa.2017.03.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 03/29/2017] [Accepted: 03/30/2017] [Indexed: 10/19/2022]
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21
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Heiss E, Handschuh S, Aerts P, Van Wassenbergh S. A tongue for all seasons: extreme phenotypic flexibility in salamandrid newts. Sci Rep 2017; 7:1006. [PMID: 28432290 PMCID: PMC5430857 DOI: 10.1038/s41598-017-00674-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 03/08/2017] [Indexed: 01/23/2023] Open
Abstract
Many organisms faced with seasonally fluctuating abiotic and biotic conditions respond by altering their phenotype to account for the demands of environmental changes. Here we discovered that newts, which switch seasonally between an aquatic and terrestrial lifestyle, grow a complex adhesive system on their tongue pad consisting of slender lingual papillae and mucus-producing cells to increase the efficiency of prey capture as they move from water onto land. The adhesive system is reduced again as newts switch back to their aquatic stage, where they use suction to capture prey. As suction performance is also enhanced seasonally by reshaping of the mouth due to the growth of labial lobes, our results show that newts are exceptional in exhibiting phenotypic flexibility in two alternating components (i.e. tongue pad and labial lobes) within a single functional system, and suggest that this form of phenotypic flexibility demands complex genetic regulation.
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Affiliation(s)
- Egon Heiss
- Institute of Systematic Zoology and Evolutionary Biology, Friedrich-Schiller-University Jena, Erbertstr. 1, 07743, Jena, Germany.
| | - Stephan Handschuh
- VetCore Facility for Research, Imaging Unit, University for Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - Peter Aerts
- Department of Biology, University of Antwerp, Universiteitsplein 1, B-2610, Antwerp, Belgium.,Department of Movement and Sports Sciences, Ghent University, Watersportlaan 2, B-9000, Ghent, Belgium
| | - Sam Van Wassenbergh
- Department of Biology, University of Antwerp, Universiteitsplein 1, B-2610, Antwerp, Belgium.,Departement d'Ecologie et de Gestion de la Biodiversité, Muséum National d' Histoire Naturelle, 57 rue Cuvier, Case postale 55, 75231, Paris Cedex 5, France
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22
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Characterisation and vascular expression of nitric oxide synthase 3 in amphibians. Cell Tissue Res 2016; 366:679-692. [PMID: 27543051 DOI: 10.1007/s00441-016-2479-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 07/11/2016] [Indexed: 01/10/2023]
Abstract
In mammals, nitric oxide (NO) produced by nitric oxide synthase 3 (NOS3) localised in vascular endothelial cells is an important vasodilator but the presence of NOS3 in the endothelium of amphibians has been concluded to be absent, based on physiological studies. In this study, a nos3 cDNA was sequenced from the toad, Rhinella marina. The open reading frame of R. marina nos3 encoded an 1170 amino acid protein that showed 81 % sequence identity to the recently cloned Xenopus tropicalis nos3. Rhinella marina nos3 mRNA was expressed in a range of tissues and in the dorsal aorta and pulmonary, mesenteric, iliac and gastrocnemius arteries. Furthermore, nos3 mRNA was expressed in the aorta of Xenopus laevis and X. tropicalis. Quantitative real-time PCR showed that removal of the endothelium of the lateral aorta of R. marina significantly reduced the expression of nos3 mRNA compared to control aorta with the endothelium intact. However, in situ hybridisation was not able to detect any nos3 mRNA in the dorsal aorta of R. marina. Immunohistochemistry using a homologous R. marina NOS3 antibody showed immunoreactivity (IR) within the basal region of many endothelial cells of the dorsal aorta and iliac artery. NOS3-IR was also observed in the proximal tubules and collecting ducts of the kidney but not within the capillaries of the glomeruli. This is the first study to demonstrate that vascular endothelial cells of an amphibian express NOS3.
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Savage AE, Terrell KA, Gratwicke B, Mattheus NM, Augustine L, Fleischer RC. Reduced immune function predicts disease susceptibility in frogs infected with a deadly fungal pathogen. CONSERVATION PHYSIOLOGY 2016; 4:cow011. [PMID: 27293759 PMCID: PMC4834730 DOI: 10.1093/conphys/cow011] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 02/28/2016] [Accepted: 03/16/2016] [Indexed: 06/06/2023]
Abstract
The relationship between amphibian immune function and disease susceptibility is of primary concern given current worldwide declines linked to the pathogenic fungus Batrachochytrium dendrobatidis (Bd). We experimentally infected lowland leopard frogs (Lithobates yavapaiensis) with Bd to test the hypothesis that infection causes physiological stress and stimulates humoral and cell-mediated immune function in the blood. We measured body mass, the ratio of circulating neutrophils to lymphocytes (a known indicator of physiological stress) and plasma bacterial killing ability (BKA; a measure of innate immune function). In early exposure (1-15 days post-infection), stress was elevated in Bd-positive vs. Bd-negative frogs, whereas other metrics were similar between the groups. At later stages (29-55 days post-infection), stress was increased in Bd-positive frogs with signs of chytridiomycosis compared with both Bd-positive frogs without disease signs and uninfected control frogs, which were similar to each other. Infection decreased growth during the same period, demonstrating that sustained resistance to Bd is energetically costly. Importantly, BKA was lower in Bd-positive frogs with disease than in those without signs of chytridiomycosis. However, neither group differed from Bd-negative control frogs. The low BKA values in dying frogs compared with infected individuals without disease signs suggests that complement activity might signify different immunogenetic backgrounds or gene-by-environment interactions between the host, Bd and abiotic factors. We conclude that protein complement activity might be a useful predictor of Bd susceptibility and might help to explain differential disease outcomes in natural amphibian populations.
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Affiliation(s)
| | | | | | | | - Lauren Augustine
- Center for Animal Care Sciences, Smithsonian Conservation Biology Institute, National Zoological Park, 3001 Connecticut Avenue NW, Washington, DC 20008, USA
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Zena LA, da Silva GSF, Gargaglioni LH, Bícego KC. Baroreflex regulation affects ventilation in the Cururu toad Rhinella schneideri. J Exp Biol 2016; 219:3605-3615. [DOI: 10.1242/jeb.144774] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 08/31/2016] [Indexed: 10/21/2022]
Abstract
Anurans regulate short-term oscillations in blood pressure through changes in heart rate (fH), vascular resistance and lymph hearts frequency. Lung ventilation in anurans is linked to blood volume homeostasis by facilitating lymph return to the cardiovascular system. We hypothesized that the arterial baroreflex modulates pulmonary ventilation in the Cururu toad Rhinella schneideri, and that this relationship is temperature-dependent. Pharmacologically induced hypotension (sodium nitroprusside) and hypertension (phenylephrine) increased ventilation (25°C: 248.7±25.7; 35°C: 351.5±50.2 ml kg−1 min−1) and decreased ventilation (25°C: 9.0±6.6; 35°C: 50.7±15.6 ml kg−1 min−1), respectively, relative to control values from Ringer's injection (25°C: 78.1±17.0; 35°C: 137.7±15.5 ml kg−1 min−1). The sensitivity of the ventilatory response to blood pressure changes was higher during hypotension than hypertension (25°C: -97.6±17.1 vs. -23.6±6.0 breaths min−1 kPa−1; 35°C: -141.0±29.5 vs. -28.7±6.4 breaths min−1 kPa−1, respectively), while temperature had no effect on those sensitivities. Hyperoxia (30%; 25°C) diminished ventilation, but did not abolish the ventilatory response to hypotension, indicating a response independent of peripheral chemoreceptors. Although there are previous data showing increased fH baroreflex sensitivity from 15 to 30°C in this species, further increases in temperature (35°C) diminished fH baroreflex gain (40.5±5.62 vs. 21.6±4.64 % kPa−1). Therefore, besides a pulmonary ventilation role in matching O2 delivery to demand at higher temperatures in anurans, it also plays a role in blood pressure regulation, independent of temperature, possibly owing to an interaction between baroreflex and respiratory areas in the brain, as previously suggested for mammals.
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Affiliation(s)
- Lucas A. Zena
- Department of Animal Morphology and Physiology, College of Agricultural and Veterinary Sciences, São Paulo State University, 14884-900, Jaboticabal, São Paulo, Brazil
- National Institute of Science and Technology in Comparative Physiology (INCT Fisiologia Comparada), 14884-900, Jaboticabal, São Paulo, Brazil
| | - Glauber S. F. da Silva
- Department of Animal Morphology and Physiology, College of Agricultural and Veterinary Sciences, São Paulo State University, 14884-900, Jaboticabal, São Paulo, Brazil
- National Institute of Science and Technology in Comparative Physiology (INCT Fisiologia Comparada), 14884-900, Jaboticabal, São Paulo, Brazil
| | - Luciane H. Gargaglioni
- Department of Animal Morphology and Physiology, College of Agricultural and Veterinary Sciences, São Paulo State University, 14884-900, Jaboticabal, São Paulo, Brazil
- National Institute of Science and Technology in Comparative Physiology (INCT Fisiologia Comparada), 14884-900, Jaboticabal, São Paulo, Brazil
| | - Kênia C. Bícego
- Department of Animal Morphology and Physiology, College of Agricultural and Veterinary Sciences, São Paulo State University, 14884-900, Jaboticabal, São Paulo, Brazil
- National Institute of Science and Technology in Comparative Physiology (INCT Fisiologia Comparada), 14884-900, Jaboticabal, São Paulo, Brazil
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25
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Zena LA, Dantonio V, Gargaglioni LH, Andrade DV, Abe AS, Bícego KC. Winter metabolic depression does not change arterial baroreflex control of heart rate in the tegu lizard (Salvator merianae). J Exp Biol 2016; 219:725-33. [DOI: 10.1242/jeb.129130] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Accepted: 12/17/2015] [Indexed: 11/20/2022]
Abstract
Baroreflex regulation of blood pressure (BP) is important for maintaining appropriate tissue perfusion. Although temperature affects heart rate (fH) reflex regulation in some reptiles and toads, no data are available on the influence of temperature-independent metabolic states on baroreflex. The South American tegu lizard Salvator merianae exhibits a clear seasonal cycle of activity decreasing fH along with winter metabolic downregulation, independent of body temperature. Through pharmacological interventions (phenylephrine and sodium nitroprusside), the baroreflex control of fH was studied at ∼25°C in spring-summer and winter-acclimated tegus.
In winter lizards, resting and minimum fH were lower than in spring-summer animals (respectively, 13.3±0.82 vs 10.3±0.81 and 11.2±0.65 vs 7.97±0.88 beats.min−1), while no acclimation differences occurred in resting BP (5.14±0.38 vs 5.06±0.56 kPa), baroreflex gain (94.3±10.7 vs 138.7±30.3 %.kPa−1) and rate-pressure product (an index of myocardial activity). Vagal tone exceeded the sympathetic tone of fH especially in the winter group. Therefore, despite the lower fH, winter acclimation does not diminish the fH baroreflex responses nor rate-pressure product possibly because of increased stroke volume that may arise due to heart hypertrophy. Independent of acclimation, fH responded more to hypotension than to hypertension. This should imply that tegus, which have no pressure separation within the single heart ventricle, must have other protection mechanisms against pulmonary hypertension or oedema, presumably through lymphatic drainage and/or vagal vasoconstriction of pulmonary artery. Such a predominant fH reflex response to hypothension, previously observed in anurans, crocodilians and mammals, may be a common feature of tetrapods.
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Affiliation(s)
- Lucas A. Zena
- Department of Animal Morphology and Physiology, College of Agricultural and Veterinarian Sciences, São Paulo State University, Jaboticabal, São Paulo, 14884-900, Brazil
- National Institute of Science and Technology – Comparative Physiology (INCT- Fisiologia Comparada), Brazil
| | - Valter Dantonio
- Department of Animal Morphology and Physiology, College of Agricultural and Veterinarian Sciences, São Paulo State University, Jaboticabal, São Paulo, 14884-900, Brazil
- National Institute of Science and Technology – Comparative Physiology (INCT- Fisiologia Comparada), Brazil
| | - Luciane H. Gargaglioni
- Department of Animal Morphology and Physiology, College of Agricultural and Veterinarian Sciences, São Paulo State University, Jaboticabal, São Paulo, 14884-900, Brazil
- National Institute of Science and Technology – Comparative Physiology (INCT- Fisiologia Comparada), Brazil
| | - Denis V. Andrade
- Department of Zoology, Institute of Bioscience, São Paulo State University, Rio Claro, São Paulo, 13506-900, Brazil
- National Institute of Science and Technology – Comparative Physiology (INCT- Fisiologia Comparada), Brazil
| | - Augusto S. Abe
- Department of Zoology, Institute of Bioscience, São Paulo State University, Rio Claro, São Paulo, 13506-900, Brazil
- National Institute of Science and Technology – Comparative Physiology (INCT- Fisiologia Comparada), Brazil
| | - Kênia C. Bícego
- Department of Animal Morphology and Physiology, College of Agricultural and Veterinarian Sciences, São Paulo State University, Jaboticabal, São Paulo, 14884-900, Brazil
- National Institute of Science and Technology – Comparative Physiology (INCT- Fisiologia Comparada), Brazil
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26
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Hedrick MS, McNew KA, Crossley DA. Baroreflex function in anurans from different environments. Comp Biochem Physiol A Mol Integr Physiol 2015; 179:144-8. [PMID: 25447736 DOI: 10.1016/j.cbpa.2014.10.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 10/03/2014] [Accepted: 10/03/2014] [Indexed: 10/24/2022]
Abstract
Anurans from terrestrial environments have an enhanced ability to maintain mean arterial blood pressure (P(m)) through lymph mobilization in response to desiccation or hemorrhage compared with semiaquatic or aquatic species. Because short term blood pressure homeostasis is regulated by arterial baroreceptors, we compared baroreflex function in three species of anurans that span a range of environments, dehydration tolerance and an ability to maintain P(m) with dehydration and hemorrhage. The cardiac limb of the baroreflex loop was studied using pharmacological manipulation of P(m) with phenylephrine and sodium nitroprusside (20–200 μg kg(− 1)), and the resulting changes in heart rate (f(H)) were quantitatively analyzed using a four-parameter sigmoidal logistic function. Resting P(m) in the aquatic species, Xenopus laevis, was 3.6 ± 0.3 kPa and was significantly less (P < 0.005) than for the semiaquatic species, Lithobates catesbeianus (4.1 ± 0.2 kPa), or the terrestrial species, Rhinella marina (4.7 ± 0.2 kPa). The maximal baroreflex gain was not different among the three species and ranged from 12.1 to 14.3 beats min( −1) kPa( −1) and occurred at P(m )ranging from 3.0 to 3.8 kPa, which were slightly below the resting P(m) for each species. Mean arterial blood pressures at rest in the three species were near the saturation point of the baroreflex curve which provides the animals with a greater fH response range to hypotensive, rather than hypertensive, changes in P(m). This is consistent with the hypothesis that arterial baroreceptors are key sensory components that allow anurans to maintain P(m) possibly by mobilization of lymphatic return in response to hypotension.
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27
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Hedrick MS, McNew KA, Crossley DA. Reprint of "Baroreflex function in anurans from different environments". Comp Biochem Physiol A Mol Integr Physiol 2015; 186:61-65. [PMID: 25843212 DOI: 10.1016/j.cbpa.2015.03.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 10/03/2014] [Accepted: 10/03/2014] [Indexed: 01/25/2023]
Abstract
Anurans from terrestrial environments have an enhanced ability to maintain mean arterial blood pressure (Pm) through lymph mobilization in response to desiccation or hemorrhage compared with semiaquatic or aquatic species. Because short term blood pressure homeostasis is regulated by arterial baroreceptors, we compared baroreflex function in three species of anurans that span a range of environments, dehydration tolerance and an ability to maintain Pm with dehydration and hemorrhage. The cardiac limb of the baroreflex loop was studied using pharmacological manipulation of Pm with phenylephrine and sodium nitroprusside (20-200μgkg(-1)), and the resulting changes in heart rate (fH) were quantitatively analyzed using a four-parameter sigmoidal logistic function. Resting Pm in the aquatic species, Xenopus laevis, was 3.6±0.3kPa and was significantly less (P<0.005) than for the semiaquatic species, Lithobates catesbeianus (4.1±0.2kPa), or the terrestrial species, Rhinella marina (4.7±0.2kPa). The maximal baroreflex gain was not different among the three species and ranged from 12.1 to 14.3beatsmin(-1)kPa(-1) and occurred at Pm ranging from 3.0 to 3.8kPa, which were slightly below the resting Pm for each species. Mean arterial blood pressures at rest in the three species were near the saturation point of the baroreflex curve which provides the animals with a greater fH response range to hypotensive, rather than hypertensive, changes in Pm. This is consistent with the hypothesis that arterial baroreceptors are key sensory components that allow anurans to maintain Pm possibly by mobilization of lymphatic return in response to hypotension.
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Affiliation(s)
- Michael S Hedrick
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA.
| | - Kadi A McNew
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
| | - Dane A Crossley
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
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28
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Hedrick MS, Hansen K, Wang T, Lauridsen H, Thygesen J, Pedersen M. Visualising lymph movement in anuran amphibians with computed tomography. J Exp Biol 2014; 217:2990-3. [DOI: 10.1242/jeb.106906] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Lymph flux rates in anuran amphibians are high relative to those of other vertebrates owing to ‘leaky’ capillaries and a high interstitial compliance. Lymph movement is accomplished primarily by specialised lymph muscles and lung ventilation that move lymph through highly compartmentalised lymph sacs to the dorsally located lymph hearts, which are responsible for pumping lymph into the circulatory system; however, it is unclear how lymph reaches the lymph hearts. We used computed tomography (CT) to visualise an iodinated contrast agent, injected into various lymph sacs, through the lymph system in cane toads (Rhinella marina). We observed vertical movement of contrast agent from lymph sacs as predicted, but the precise pathways were sometimes unexpected. These visual results confirm predictions regarding lymph movement, but also provide some novel findings regarding the pathways for lymph movement and establish CT as a useful technique for visualising lymph movement in amphibians.
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Affiliation(s)
- Michael S. Hedrick
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
| | - Kasper Hansen
- Comparative Medicine Laboratory, Department of Clinical Medicine, Aarhus University Hospital, Skejby, DK-8200, Denmark
| | - Tobias Wang
- Zoophysiology, Department of Biosciences, University of Aarhus, DK-8000 Aarhus C, Denmark
| | - Henrik Lauridsen
- Comparative Medicine Laboratory, Department of Clinical Medicine, Aarhus University Hospital, Skejby, DK-8200, Denmark
| | - Jesper Thygesen
- Department of Clinical Engineering, Aarhus University Hospital, Skejby, DK-8200 Aarhus N, Denmark
| | - Michael Pedersen
- Comparative Medicine Laboratory, Department of Clinical Medicine, Aarhus University Hospital, Skejby, DK-8200, Denmark
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29
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Bazigou E, Wilson JT, Moore JE. Primary and secondary lymphatic valve development: molecular, functional and mechanical insights. Microvasc Res 2014; 96:38-45. [PMID: 25086182 DOI: 10.1016/j.mvr.2014.07.008] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 07/17/2014] [Accepted: 07/22/2014] [Indexed: 01/27/2023]
Abstract
Fluid homeostasis in vertebrates critically relies on the lymphatic system forming a hierarchical network of lymphatic capillaries and collecting lymphatics, for the efficient drainage and transport of extravasated fluid back to the cardiovascular system. Blind-ended lymphatic capillaries employ specialized junctions and anchoring filaments to encourage a unidirectional flow of the interstitial fluid into the initial lymphatic vessels, whereas collecting lymphatics are responsible for the active propulsion of the lymph to the venous circulation via the combined action of lymphatic muscle cells and intraluminal valves. Here we describe recent findings on molecular and physical factors regulating the development and maturation of these two types of valves and examine their role in tissue-fluid homeostasis.
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Affiliation(s)
- Eleni Bazigou
- Department of Bioengineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK.
| | - John T Wilson
- Department of Bioengineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - James E Moore
- Department of Bioengineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
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30
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Withers PC, Hedrick MS, Drewes RC, Hillman SS. Pulmonary Compliance and Lung Volume Are Related to Terrestriality in Anuran Amphibians. Physiol Biochem Zool 2014; 87:374-83. [DOI: 10.1086/676146] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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31
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Burggren WW, Christoffels VM, Crossley DA, Enok S, Farrell AP, Hedrick MS, Hicks JW, Jensen B, Moorman AFM, Mueller CA, Skovgaard N, Taylor EW, Wang T. Comparative cardiovascular physiology: future trends, opportunities and challenges. Acta Physiol (Oxf) 2014; 210:257-76. [PMID: 24119052 DOI: 10.1111/apha.12170] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 07/16/2013] [Accepted: 09/12/2013] [Indexed: 12/23/2022]
Abstract
The inaugural Kjell Johansen Lecture in the Zoophysiology Department of Aarhus University (Aarhus, Denmark) afforded the opportunity for a focused workshop comprising comparative cardiovascular physiologists to ponder some of the key unanswered questions in the field. Discussions were centred around three themes. The first considered function of the vertebrate heart in its various forms in extant vertebrates, with particular focus on the role of intracardiac shunts, the trabecular ('spongy') nature of the ventricle in many vertebrates, coronary blood supply and the building plan of the heart as revealed by molecular approaches. The second theme involved the key unanswered questions in the control of the cardiovascular system, emphasizing autonomic control, hypoxic vasoconstriction and developmental plasticity in cardiovascular control. The final theme involved poorly understood aspects of the interaction of the cardiovascular system with the lymphatic, renal and digestive systems. Having posed key questions around these three themes, it is increasingly clear that an abundance of new analytical tools and approaches will allow us to learn much about vertebrate cardiovascular systems in the coming years.
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Affiliation(s)
- W. W. Burggren
- Developmental Integrative Biology Cluster; Department of Biological Sciences; University of North Texas; Denton TX USA
| | - V. M. Christoffels
- Department of Anatomy, Embryology & Physiology; Academic Medical Centre; Amsterdam The Netherlands
| | - D. A. Crossley
- Developmental Integrative Biology Cluster; Department of Biological Sciences; University of North Texas; Denton TX USA
| | - S. Enok
- Zoophysiology; Department of Bioscience; Aarhus University; Aarhus Denmark
| | - A. P. Farrell
- Department of Zoology and Faculty of Land and Food Systems; University of British Columbia; Vancouver BC Canada
| | - M. S. Hedrick
- Developmental Integrative Biology Cluster; Department of Biological Sciences; University of North Texas; Denton TX USA
| | - J. W. Hicks
- Department of Ecology and Evolutionary Biology; University of California; Irvine CA USA
| | - B. Jensen
- Department of Anatomy, Embryology & Physiology; Academic Medical Centre; Amsterdam The Netherlands
- Zoophysiology; Department of Bioscience; Aarhus University; Aarhus Denmark
| | - A. F. M. Moorman
- Department of Anatomy, Embryology & Physiology; Academic Medical Centre; Amsterdam The Netherlands
| | - C. A. Mueller
- Developmental Integrative Biology Cluster; Department of Biological Sciences; University of North Texas; Denton TX USA
| | - N. Skovgaard
- Zoophysiology; Department of Bioscience; Aarhus University; Aarhus Denmark
| | - E. W. Taylor
- School of Biosciences; University of Birmingham; Birmingham UK
| | - T. Wang
- Zoophysiology; Department of Bioscience; Aarhus University; Aarhus Denmark
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Planas-Paz L, Lammert E. Mechanosensing in developing lymphatic vessels. ADVANCES IN ANATOMY, EMBRYOLOGY, AND CELL BIOLOGY 2014; 214:23-40. [PMID: 24276884 DOI: 10.1007/978-3-7091-1646-3_3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The lymphatic vasculature is responsible for fluid homeostasis, transport of immune cells, inflammatory molecules, and dietary lipids. It is composed of a network of lymphatic capillaries that drain into collecting lymphatic vessels and ultimately bring fluid back to the blood circulation. Lymphatic endothelial cells (LECs) that line lymphatic capillaries present loose overlapping intercellular junctions and anchoring filaments that support fluid drainage. When interstitial fluid accumulates within tissues, the extracellular matrix (ECM) swells and pulls the anchoring filaments. This results in opening of the LEC junctions and permits interstitial fluid uptake. The absorbed fluid is then transported within collecting lymphatic vessels, which exhibit intraluminal valves that prevent lymph backflow and smooth muscle cells that sequentially contract to propel lymph.Mechanotransduction involves translation of mechanical stimuli into biological responses. LECs have been shown to sense and respond to changes in ECM stiffness, fluid pressure-induced cell stretch, and fluid flow-induced shear stress. How these signals influence LEC function and lymphatic vessel growth can be investigated by using different mechanotransduction assays in vitro and to some extent in vivo.In this chapter, we will focus on the mechanical forces that regulate lymphatic vessel expansion during embryonic development and possibly secondary lymphedema. In mouse embryos, it has been recently shown that the amount of interstitial fluid determines the extent of lymphatic vessel expansion via a mechanosensory complex formed by β1 integrin and vascular endothelial growth factor receptor-3 (VEGFR3). This model might as well apply to secondary lymphedema.
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Affiliation(s)
- Lara Planas-Paz
- Institute of Metabolic Physiology, Heinrich-Heine University, Universitätsstrasse 1, 40225, Düsseldorf, Germany
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Blei F. Update December 2013. Lymphat Res Biol 2013. [DOI: 10.1089/lrb.2013.1142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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