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Felipo-Benavent M, O'Connor JE, Álvaro-Álvarez T, Valls-Torres M, Rojo C, García-Párraga D, Martínez-Romero A, Rubio-Guerri C. Monitoring platelet function in marine mammals: Intracellular Ca 2+ mobilization as a biomarker of platelet activation. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2024; 150:105080. [PMID: 37844676 DOI: 10.1016/j.dci.2023.105080] [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: 05/05/2023] [Revised: 10/10/2023] [Accepted: 10/10/2023] [Indexed: 10/18/2023]
Abstract
Platelet functionality plays a crucial role in marine mammals. Alterations in platelet function can result from stress, pathologies, or exposure to xenobiotics, among others. The early detection of platelet function abnormalities is essential in these species to prevent advanced pathology and mitigate potential risks. Our main objective was to establish a range of physiological values of platelet function in bottlenose dolphins (Tursiops truncatus), beluga whales (Delphinapterus leucas), sea lions (Otaria flavescens) and walruses (Odobenus rosmarus). Intraplatelet Ca2+ mobilization using adenosine diphosphate (ADP) as a platelet agonist was used as a platelet function biomarker, adapting the methodology previously described by us in dolphins (Felipo-Benavent et al., 2022) to the rest of the species. The assay was also adapted to a seal (Phoca vitulina). Numerical indicators of intraplatelet Ca2+ mobilization kinetics were established, and statistical analyses were performed to compare the effects of species, sex, age, aquarium and species. Significant differences were observed between species, being the platelets of the sea lions the more reactive to the agonist. This work demonstrates the usefulness of this assay in the diagnosis or monitoring of animals with hemostatic diseases, showing two clinical cases in which intraplatelet calcium mobilization values were altered in marine mammals suffering haemorrhages. This assay may also serve as a means to monitor environmental changes and their potential impact on the health of marine mammal populations.
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Affiliation(s)
- Mar Felipo-Benavent
- Laboratory of Cytomics, Joint Research Unit CIPF-UVEG, Department of Biochemistry and Molecular Biology, University of Valencia, Av. de Blasco Ibáñez, 15, 46010, Valencia, Spain; Department of Biomedical Sciences, Faculty of Health Sciences, Universidad CEU Cardenal Herrera, Alfara del Patriarca, 46113, Valencia, Spain
| | - José-Enrique O'Connor
- Laboratory of Cytomics, Joint Research Unit CIPF-UVEG, Department of Biochemistry and Molecular Biology, University of Valencia, Av. de Blasco Ibáñez, 15, 46010, Valencia, Spain
| | - Teresa Álvaro-Álvarez
- Veterinary Services, Oceanogràfic, Ciudad de las Artes y las Ciencias, C/Eduardo Primo Yúfera 1B, 46013, Valencia, Spain
| | - Mónica Valls-Torres
- Veterinary Services, Oceanogràfic, Ciudad de las Artes y las Ciencias, C/Eduardo Primo Yúfera 1B, 46013, Valencia, Spain
| | - Carlos Rojo
- Veterinary Services, Oceanogràfic, Ciudad de las Artes y las Ciencias, C/Eduardo Primo Yúfera 1B, 46013, Valencia, Spain
| | - Daniel García-Párraga
- Veterinary Services, Oceanogràfic, Ciudad de las Artes y las Ciencias, C/Eduardo Primo Yúfera 1B, 46013, Valencia, Spain; Research Department, Fundación Oceanogràfic de la Comunitat Valenciana, Ciudad de las Artes y las Ciencias, C/Eduardo Primo Yúfera 1B, 46013, Valencia, Spain
| | - Alicia Martínez-Romero
- Cytomics Technological Service, Príncipe Felipe Research Center, C/Eduardo Primo Yúfera 3, 46012, Valencia, Spain.
| | - Consuelo Rubio-Guerri
- Research Department, Fundación Oceanogràfic de la Comunitat Valenciana, Ciudad de las Artes y las Ciencias, C/Eduardo Primo Yúfera 1B, 46013, Valencia, Spain; Department of Pharmacy, Faculty of Health Sciences, Universidad CEU Cardenal Herrera, CEU Universities, Valencia, Spain.
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Felipo-Benavent M, Martínez-Romero A, Rubio-Guerri C, Álvaro-Álvarez T, Gil D, García-Párraga D, O'Connor JE. Flow cytometric kinetic assay of calcium mobilization in whole blood platelets of bottlenose dolphins (Tursiops truncatus). Cytometry A 2022; 103:347-352. [PMID: 36164987 DOI: 10.1002/cyto.a.24693] [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: 07/21/2022] [Revised: 09/08/2022] [Accepted: 09/13/2022] [Indexed: 11/07/2022]
Abstract
Marine mammals may suffer alterations in platelet function and hemostasia due to multiple pathologies, environmental conditions (including stress) or exposure to different contaminants that induce platelet activation. Detecting early alterations in platelet function in these animals could be an especially relevant diagnostic tool in these species because they typically do not show signs of weakness or disease until the pathology is in advanced state, in order to avoid attracting predators in natural conditions. The study of early markers of platelet activation is relevant for the detection, monitoring and therapy of inflammation and hemostasis disorders. Flow cytometry provides a convenient method to evaluate platelet activation by following the kinetics of intracellular Ca2+ , using sensitive fluorescent indicators that can be loaded into intact cells. In order to study intraplatelet Ca2+ mobilization in marine mammals, we have adapted a kinetic assay of human platelet activation to study platelet activation in whole-blood samples of bottlenose dolphins (Tursiops truncatus) using the Ca2+ -sensitive dye Fluo-4AM and a clone of the platelet-specific antibody CD41-PE that recognizes dolphin platelets. This no-wash, no-lyse protocol provides a simple and sensitive tool to assess in vitro the time course and intensity of signal-transduction responses to platelet agonists under near-physiological conditions. The adaptation of this technique to marine mammals represents a methodological advance for basic and clinical veterinary applications but also for general environmental studies on these species.
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Affiliation(s)
- Mar Felipo-Benavent
- Laboratory of Cytomics, Joint Research Unit CIPF-UVEG, Department of Biochemistry and Molecular Biology, University of Valencia, Valencia, Spain
| | | | - Consuelo Rubio-Guerri
- Research Department, Fundació Oceanogràfic de la Comunitat Valenciana, Valencia, Spain.,Department of Pharmacy, Faculty of Health Sciences, Universidad CEU Cardenal Herrera, CEU Universities, Valencia, Spain
| | - Teresa Álvaro-Álvarez
- Veterinary Services, Oceanogràfic, Ciudad de las Artes y las Ciencias, Valencia, Spain
| | - Domingo Gil
- Cytomics Technological Service, Príncipe Felipe Research Center, Valencia, Spain
| | - Daniel García-Párraga
- Research Department, Fundació Oceanogràfic de la Comunitat Valenciana, Valencia, Spain.,Veterinary Services, Oceanogràfic, Ciudad de las Artes y las Ciencias, Valencia, Spain
| | - José-Enrique O'Connor
- Laboratory of Cytomics, Joint Research Unit CIPF-UVEG, Department of Biochemistry and Molecular Biology, University of Valencia, Valencia, Spain
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Velasquez-Mao AJ, Velasquez M, Vandsburger MH. Cyclical depressurization degranulates platelets in an agonist-free mechanism of platelet activation. PLoS One 2022; 17:e0274178. [PMID: 36107866 PMCID: PMC9477271 DOI: 10.1371/journal.pone.0274178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 08/24/2022] [Indexed: 11/18/2022] Open
Abstract
Activation of circulating platelets by receptor binding and subsequent coagulation events are defined by a well characterized physiological response. However, the growing prevalence of chronic kidney disease (CKD) and implication of platelet-released factors in worsening cardiovascular outcomes with hemodialysis warrant further investigation into the mechanobiology of platelet degranulation. The significant drops in pressure caused by high friction across the hemodialysis flow circuit present an overlooked platelet stimulant not involving immobilization as a driver for cytoskeletal rearrangement. In this study, platelets from healthy and dialysis (pre- and post-treatment) donors were cyclically depressurized in static suspension to measure changes in physiology by integrin αIIbβ3 activation and surface P-selectin expression. The progressive increase in CD62P with no changes in PAC1 over pressure-cycling duration regardless of uremia signifies that hydrostatic depressurization involves a novel agonist-free mechanism leading to platelet degranulation as a unique case in which CD62P and PAC1 do not interchangeably indicate platelet activation. Subsequent stimulation using ADP further suggests that sustained depressurization regimens desensitize integrin αIIbβ3 activation. Variability in platelet response caused by uremia and CKD are observed by elevated baseline PAC1 in pre-dialysis samples, PAC1 retention after ADP exposure, and maximum CD62P with ADP independent of pressure. Theory for hydrostatic pressure-induced degranulation circumventing integrin-initiated signal transduction is here presented based on the Starling Equation.
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Affiliation(s)
- Aaron J. Velasquez-Mao
- UC Berkeley–UCSF Graduate Program in Bioengineering, Berkeley, CA, United States of America
| | - Mark Velasquez
- Department of Bioengineering, UC Berkeley, Berkeley, CA, United States of America
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Thompson LA, Romano TA. Effects of health status on pressure-induced changes in phocid immune function and implications for dive ability. J Comp Physiol B 2019; 189:637-657. [PMID: 31346696 DOI: 10.1007/s00360-019-01228-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 06/12/2019] [Accepted: 07/14/2019] [Indexed: 12/28/2022]
Abstract
The ability of marine mammals to cope with environmental challenges is a key determining factor in strandings and successful release of rehabilitated animals. Dive behavior is related to foraging and thus survival. While dive adaptations have been well studied, it is unknown how the immune system responds to diving and whether health status impacts immune function during diving. This study investigated the functional response of ex situ immune cells from stranded phocids to in vitro increased pressure, over the course of rehabilitation. Blood samples were drawn from stranded harbor seals (Phoca vitulina), gray seals (Halichoerus grypus) and harp seals (Phoca groenlandica) at the time of admit to the Mystic Aquarium, Mystic, CT and again after rehabilitation (pre-release). Phagocytosis, lymphocyte proliferation and immune cell activation were measured in vitro, with and without exposure to 2000 psi (simulated dive depth of 1360 m). Plasma epinephrine and norepinephrine, and serum cortisol were measured in vivo. All hormone values decreased between admit and release conditions. Under admit or release conditions, pressure exposures resulted in significant changes in granulocyte and monocyte phagocytosis, granulocyte expression of CD11b and lymphocyte expression of the IL2 receptor (IL2R). Overall, pressure exposures resulted in decreased phagocytosis for admit conditions, but increased phagocytosis in release samples. Expression of leukocyte activation markers, CD11b and IL2R, increased and the response did not differ between admit and release samples. Specific hematological and serum chemistry values also changed significantly between admit and release and were significantly correlated with pressure-induced changes in immune function. Results suggest (1) dive duration affects the response of immune cells, (2) different white blood cell types respond differently to pressure and (3) response varies with animal health. This is the first study describing the relationship between diving, immune function and health status in phocids.
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Affiliation(s)
- L A Thompson
- Mystic Aquarium a Division of Sea Research Foundation, 55 Coogan Blvd, Mystic, CT, 06355, USA.
| | - T A Romano
- Mystic Aquarium a Division of Sea Research Foundation, 55 Coogan Blvd, Mystic, CT, 06355, USA
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Bagchi A, Batten AJ, Levin M, Allen KN, Fitzgerald ML, Hückstädt LA, Costa DP, Buys ES, Hindle AG. Intrinsic anti-inflammatory properties in the serum of two species of deep-diving seal. ACTA ACUST UNITED AC 2018; 221:jeb.178491. [PMID: 29748216 DOI: 10.1242/jeb.178491] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 05/04/2018] [Indexed: 12/29/2022]
Abstract
Weddell and elephant seals are deep-diving mammals, which rely on lung collapse to limit nitrogen absorption and prevent decompression injury. Repeated collapse and re-expansion exposes the lungs to multiple stressors, including ischemia-reperfusion, alveolar shear stress and inflammation. There is no evidence, however, that diving damages pulmonary function in these species. To investigate potential protective strategies in deep-diving seals, we examined the inflammatory response of seal whole blood exposed to lipopolysaccharide (LPS), a potent endotoxin. Interleukin-6 (IL6) cytokine production elicited by LPS exposure was 50 to 500 times lower in blood of healthy northern elephant seals and Weddell seals compared with that of healthy human blood. In contrast to the ∼6× increased production of IL6 protein from LPS-exposed Weddell seal whole blood, isolated Weddell seal peripheral blood mononuclear cells, under standard cell culture conditions using medium supplemented with fetal bovine serum (FBS), produced a robust LPS response (∼300×). Induction of Il6 mRNA expression as well as production of IL6, IL8, IL10, KC-like and TNFα were reduced by substituting FBS with an equivalent amount of autologous seal serum. Weddell seal serum also attenuated the inflammatory response of RAW 267.4 mouse macrophage cells exposed to LPS. Cortisol level and the addition of serum lipids did not impact the cytokine response in cultured cells. These data suggest that seal serum possesses anti-inflammatory properties, which may protect deep divers from naturally occurring inflammatory challenges such as dive-induced hypoxia-reoxygenation and lung collapse.
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Affiliation(s)
- Aranya Bagchi
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114, USA
| | - Annabelle J Batten
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114, USA
| | - Milton Levin
- Department of Pathobiology and Veterinary Science, University of Connecticut, 61 North Eagleville Road, Storrs, CT 06269, USA
| | - Kaitlin N Allen
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114, USA.,Department of Integrative Biology, University of California Berkeley, Valley Life Sciences Building 5043, Berkeley, CA 94720, USA
| | - Michael L Fitzgerald
- Lipid Metabolism Unit, Center for Computational and Integrative Biology, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114, USA
| | - Luis A Hückstädt
- Department of Ecology and Evolutionary Biology, University of California Santa Cruz, 130 McAllister Way, Santa Cruz, CA 95060, USA
| | - Daniel P Costa
- Department of Ecology and Evolutionary Biology, University of California Santa Cruz, 130 McAllister Way, Santa Cruz, CA 95060, USA
| | - Emmanuel S Buys
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114, USA
| | - Allyson G Hindle
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114, USA
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PHARMACOKINETIC STUDY OF ORAL ε-AMINOCAPROIC ACID IN THE NORTHERN ELEPHANT SEAL (MIROUNGA ANGUSTIROSTRIS). J Zoo Wildl Med 2016; 47:438-46. [PMID: 27468014 DOI: 10.1638/2015-0138.1] [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] [Indexed: 11/21/2022] Open
Abstract
ε-Aminocaproic acid (EACA) is a lysine analogue antifibrinolytic drug used to treat bleeding disorders in humans and domestic animals. Its use in zoological medicine is rare, and dosage is anecdotal. One possible application of EACA is to treat bleeding associated with prepatent Otostrongylus arteritis in Northern elephant seals ( Mirounga angustirostris ) presenting to wildlife rehabilitation centers. This study used an in vitro model of hyperfibrinolysis and a thromboelastograph-based assay to estimate the therapeutic plasma concentration of EACA in elephant seals (85 μg/ml, 95% confidence interval = 73.8-96.8 μg/ml). A concurrent pharmacokinetic study of orally administered, single-dose EACA found that doses of 75 and 100 mg/kg achieved therapeutic plasma concentrations (>85 μg/ml), but the drug was rapidly eliminated and remained in the therapeutic range for only 0.4 and 1.5 hr, respectively. Models of repeated oral dosing at 100 mg/kg every 6 hr predict that therapeutic plasma concentration will be maintained for 31.7% (7.6 hr) of a 24-hr period. More frequent dosing would be required to maintain continuous therapeutic concentrations but would be impractical in a wildlife rehabilitation setting. Further pharmacodynamic studies to evaluate the duration of action of EACA in elephant seals and a prospective, placebo-controlled study are needed to determine if EACA is effective in decreasing bleeding associated with prepatent Otostrongylus arteritis and other bleeding disorders in this species.
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Van Poucke S, Stevens K, Marcus AE, Lancé M. Hypothermia: effects on platelet function and hemostasis. Thromb J 2014; 12:31. [PMID: 25506269 PMCID: PMC4265340 DOI: 10.1186/s12959-014-0031-z] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2014] [Accepted: 11/30/2014] [Indexed: 02/01/2023] Open
Abstract
Mild therapeutic hypothermia is considered standard care in the treatment of patients resuscitated from cardiac arrest. With increasingly more frequent concomitant use of platelet-inhibiting drugs, clinicians must be cognizant of the ramifications of hypothermia on platelet function as part of hemostasis. The effects of hypothermia on platelet function have been studied for more than 50 years, but the results are inconsistent and may be related to the circumstances during which hypothermia is achieved. This review summarizes current knowledge of platelet function during hypothermia and the impact on hemostasis.
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Affiliation(s)
- Sven Van Poucke
- />Department of Anesthesiology, Intensive Care Medicine, Emergency Care and Pain Therapy ZOL, Genk, Belgium
| | - Kris Stevens
- />Department of Anesthesiology, Maastricht University, Maastricht, Netherlands
| | | | - Marcus Lancé
- />Department of Anesthesiology, Maastricht University, Maastricht, Netherlands
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Jagroop A, Mikhailidis DP. Platelet cholesterol: from man to seal. Platelets 2012; 24:253-4. [PMID: 22720836 DOI: 10.3109/09537104.2012.696750] [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]
Affiliation(s)
- Anita Jagroop
- Department of Surgery, Division of Surgical and Interventional Science, Royal Free campus, University College London Medical School, University College London, Pond Street, London NW3 2QG, UK.
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