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Galvão NA, Cordeiro F, Bernardi MM, Kirsten TB. Ivermectin prevents stress-induced testicular damage in juvenile rats. Tissue Cell 2024; 86:102292. [PMID: 38159533 DOI: 10.1016/j.tice.2023.102292] [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: 08/25/2023] [Revised: 12/13/2023] [Accepted: 12/16/2023] [Indexed: 01/03/2024]
Abstract
Ivermectin is a popular antiparasitic drug used in veterinary and human medicine. Studies by our group have shown that therapeutic doses of ivermectin induce some brain and behavioral impairments, especially in the reproductive sphere. So far, the studies were focused in adulthood. Considering that juveniles are more susceptible to drugs during developmental stages and both farm/domestic animals and humans have been medicated with ivermectin in youth, it is necessary to evaluate the possible harm effects in youth. The stress variable is also important, as it potentially influences the effects produced by ivermectin. Therefore, the objective of this study was to evaluate morphofunctional and hormonal reproductive aspects of juvenile rats exposed to ivermectin and/or stressed. Prepubertal male rats were treated with 0.2 or 1.0 mg/kg of ivermectin (a therapeutic dose and a higher dose, respectively). Rats were also submitted to a restraint stress session. The testis morphology and histology were analyzed and plasma testosterone levels were measured. The two doses of ivermectin did not induce a biologically relevant effect on testis and testosterone levels of rats. However, restraint stress impaired macroscopic and microscopic morphometric and stereological parameters, as well as the histology of the testis: it increased the relative testis weight, the tubular diameter, the tubular luminal diameter, and the tubular cellular index, and injured the interstitial area. Previous treatment of juvenile rats with ivermectin prevented most of the stress-induced testes injuries. In conclusion, in addition to be a remarkable antiparasitic agent, ivermectin prevented stress-induced testes injuries in juvenile rats.
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Affiliation(s)
- Nathalia A Galvão
- Psychoneuroimmunology Laboratory, Program in Environmental and Experimental Pathology, Paulista University, São Paulo, Brazil
| | - Flora Cordeiro
- Psychoneuroimmunology Laboratory, Program in Environmental and Experimental Pathology, Paulista University, São Paulo, Brazil
| | - Maria M Bernardi
- Psychoneuroimmunology Laboratory, Program in Environmental and Experimental Pathology, Paulista University, São Paulo, Brazil
| | - Thiago B Kirsten
- Psychoneuroimmunology Laboratory, Program in Environmental and Experimental Pathology, Paulista University, São Paulo, Brazil.
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2
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Sakata JT, Catalano I, Woolley SC. Mechanisms, development, and comparative perspectives on experience-dependent plasticity in social behavior. JOURNAL OF EXPERIMENTAL ZOOLOGY PART 2021; 337:35-49. [PMID: 34516724 DOI: 10.1002/jez.2539] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 08/08/2021] [Indexed: 11/09/2022]
Abstract
Revealing the mechanisms underlying experience-dependent plasticity is a hallmark of behavioral neuroscience. While the study of social behavior has focused primarily on the neuroendocrine and neural control of social behaviors, the plasticity of these innate behaviors has received relatively less attention. Here, we review studies on mating-dependent changes to social behavior and neural circuitry across mammals, birds, and reptiles. We provide an overview of species similarities and differences in the effects of mating experiences on motivational and performative aspects of sexual behaviors, on sensory processing and preferences, and on the experience-dependent consolidation of sexual behavior. We also discuss recent insights into the neural mechanisms of and developmental influences on mating-dependent changes and outline promising approaches to investigate evolutionary parallels and divergences in experience-dependent plasticity.
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Affiliation(s)
- Jon T Sakata
- Integrated Program in Neuroscience, McGill University, Montreal, Québec, Canada.,Department of Biology, McGill University, Montreal, Québec, Canada
| | - Isabella Catalano
- Integrated Program in Neuroscience, McGill University, Montreal, Québec, Canada
| | - Sarah C Woolley
- Integrated Program in Neuroscience, McGill University, Montreal, Québec, Canada.,Department of Biology, McGill University, Montreal, Québec, Canada
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3
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Moreira N, Vicente FL, Sandini TM, Martinelli ECL, Navas-Suárez PE, Reis-Silva TM, Spinosa HS. Effects of ivermectin treatment during prepubertal and pubertal period on sexual parameters and sexual behavior in adulthood in rats. Res Vet Sci 2019; 129:21-27. [PMID: 31927177 DOI: 10.1016/j.rvsc.2019.12.013] [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: 02/05/2019] [Revised: 08/05/2019] [Accepted: 12/10/2019] [Indexed: 11/24/2022]
Abstract
Pediculosis is a parasitic disease that is considered a serious global public health problem. It is caused by the ectoparasite that is popularly known as lice, mainly affecting children in early childhood. The most commonly used treatment to combat this parasitosis is the macrocyclic lactone ivermectin (IVM). However, the use of IVM is contraindicated in children who are younger than 5 years old or who weigh <15 kg because some types of drugs that are used during certain periods of brain maturation can lead to behavioral disorders. The present study evaluated the effects of IVM treatment during the prepubertal and pubertal period on sexual behavior in adulthood in male rats. Genital grooming, preputial separation, sexual behavior, sexual motivation, relative organ weight, the gonadosomatic index, and histopathology were evaluated. Oral dose of 0.2 mg/kg (therapeutic dose) of a commercial IVM formulation was administered. IVM affected genital grooming but did not influence preputial separation in prepubertal rats. Prepubertal IVM administration did not impair sexual behavior in adult rats, with the exception of the time of residence with female rats in the sexual motivation test. It did not affect relative organ weights, with the exception of the relative weight of the full seminal vesicle. It did not alter the gonadosomatic index, and no histopathological alterations were observed in different organs. These results indicate that administration of a therapeutic dose of IVM during the prepubertal and pubertal period does not alter parameters of sexual development or sexual behavior in adult male rats.
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Affiliation(s)
- N Moreira
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil; Graduate Program of Enviromental and Experimental Pathology and Graduate Program of Dentistry, Paulista University, São Paulo, SP, Brazil.
| | - F L Vicente
- Student of Health Science Institute, Presbiterian Mackenzie University, São Paulo, SP, Brazil
| | - T M Sandini
- Department of Anatomy, Physiology, and Pharmacology, University of Saskatchewan, Saskatoon, SK, Canada
| | - E C L Martinelli
- Research Center of Veterinary Toxicology (CEPTOX), Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, SP, Brazil
| | - P E Navas-Suárez
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil
| | - T M Reis-Silva
- Graduate Program of Enviromental and Experimental Pathology and Graduate Program of Dentistry, Paulista University, São Paulo, SP, Brazil
| | - H S Spinosa
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil
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Parisi DP, Santos SAR, Cabral D, Queiroz-Hazarbassanov N, Flório JC, Bernardi MM, Kirsten TB. Therapeutical doses of ivermectin and its association with stress disrupt motor and social behaviors of juvenile rats and serotonergic and dopaminergic systems. Res Vet Sci 2019; 124:149-157. [PMID: 30901667 DOI: 10.1016/j.rvsc.2019.03.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 03/11/2019] [Accepted: 03/12/2019] [Indexed: 12/20/2022]
Abstract
Ivermectin is a human and veterinary antiparasitic drug which is one of the most widely used in the world. Studies from our group have revealed several behavioral and neurochemical impairments induced by therapeutic doses of ivermectin in adult rats. However, the effects on juveniles remain unknown. Ivermectin has been prescribed for juvenile humans, pets and farm animals, which still show remarkable development and postnatal maturation and may be more susceptible to drug interventions. Hence, we studied the behavioral and neurochemical effects of two therapeutical doses (0.2 and 1.0 mg/kg) of ivermectin in juvenile rats. As it is underestimated in prescriptions, the stress factor was also studied. Ivermectin 1.0 mg/kg induced hyperlocomotion in juvenile rats. Association of 1.0 mg/kg ivermectin with stress induced hypolocomotion in rats. Ivermectin 1.0 mg/kg whether or not associated with stress exacerbated socialization of rats. Ivermectin did not induce anxiety-like behavior neither affected corticosterone levels of juvenile rats. The motor/exploratory behavioral findings induced by association of ivermectin and stress seem to be triggered after the increase in the striatal serotonergic system activity. Association of ivermectin with stress increased striatal dopamine levels, which increased (excessive) social play behavior. Our results suggest a review of the prescribed dose of ivermectin for juvenile humans and pets. Moreover, the stress factor should be considered for ivermectin medical prescriptions, since it may exacerbate behavioral and neurochemical disturbances.
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Affiliation(s)
- Débora P Parisi
- Environmental and Experimental Pathology, Paulista University, Rua Dr. Bacelar, 1212, São Paulo, SP 04026-002, Brazil
| | - Satiro A R Santos
- Environmental and Experimental Pathology, Paulista University, Rua Dr. Bacelar, 1212, São Paulo, SP 04026-002, Brazil
| | - Danilo Cabral
- Environmental and Experimental Pathology, Paulista University, Rua Dr. Bacelar, 1212, São Paulo, SP 04026-002, Brazil
| | - Nicolle Queiroz-Hazarbassanov
- Department of Pathology, School of Veterinary Medicine, University of São Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, São Paulo, SP 05508-270, Brazil
| | - Jorge C Flório
- Department of Pathology, School of Veterinary Medicine, University of São Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, São Paulo, SP 05508-270, Brazil
| | - Maria M Bernardi
- Environmental and Experimental Pathology, Paulista University, Rua Dr. Bacelar, 1212, São Paulo, SP 04026-002, Brazil
| | - Thiago B Kirsten
- Environmental and Experimental Pathology, Paulista University, Rua Dr. Bacelar, 1212, São Paulo, SP 04026-002, Brazil.
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5
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Moreira N, Torres MA, Navas-Suárez PE, Gonçalves V, Raspantini PCF, Raspantini LER, Gotardo AT, Andrade AFC, Spinosa HS. Ivermectin does not interfere with seminal and hormonal parameters in male rabbits. Theriogenology 2019; 124:32-38. [PMID: 30336301 DOI: 10.1016/j.theriogenology.2018.09.029] [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: 03/21/2018] [Revised: 09/18/2018] [Accepted: 09/26/2018] [Indexed: 10/28/2022]
Abstract
Ivermectin (IVM) is a macrocyclic lactone used as a broad spectrum antiparasitic agent against nematodes and arthropods. It is mainly used in the control of parasitic infections of domestic animals, and recently has been used in humans to treat onchocerciasis, scabies, and pediculosis. In mammals, evidence has indicated that macrocyclic lactones interact with gamma-aminobutyric acid (GABA)-mediated chloride channels. The GABAergic system is known to be involved in the manifestation of sexual behavior, and previous studies have shown that IVM impaired sexual behavior in both male and female rats. Thus, considering that IVM may interfere with the sexual sphere, this study evaluated the temporal (1 up 60 days) effects of exposure to IVM (0.2 and 1.0 mg/kg, administered subcutaneously) on seminal and hormonal parameters of male rabbits. In male rabbits, the spermatozoa concentration, motility and morphology, the integrity of the plasmatic, acrosomal and mitochondrial membranes of the spermatozoa, the organ weights, gonadosomatic index, serum testosterone concentrations, histopathological findings were evaluated and hematological and serum biochemical analysis was conducted. No changes were observed in male seminal parameters evaluated by spermatozoa concentration, motility, and morphology, nor the potential for fertilization evaluated by the integrity of the plasmatic, acrosomal, and mitochondrial membranes of the spermatozoa; there was also no interference in serum testosterone concentration, serum biochemistry and hematological parameters. The findings of this study using the artificial vagina for collection of semen and computer-assisted semen analysis showed that IVM at doses of 0.2 and 1.0 mg/kg of SC did not alter any of the semen parameters of rabbits evaluated for up to 60 days after administration.
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Affiliation(s)
- N Moreira
- Graduate Program of Experimental and Comparative Pathology, Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, São Paulo, SP, 05508-270, Brazil.
| | - M A Torres
- Graduate Program of Animal Reproduction, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil, Av. Duque de Caxias Norte, 225, Pirassununga, SP, 13635-900, Brazil
| | - P E Navas-Suárez
- Graduate Program of Experimental and Comparative Pathology, Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, São Paulo, SP, 05508-270, Brazil
| | - V Gonçalves
- Graduate Program of Experimental and Comparative Pathology, Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, São Paulo, SP, 05508-270, Brazil
| | - P C F Raspantini
- Research Center of Veterinary Toxicology (CEPTOX), Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, Av. Duque de Caxias Norte, 225, Pirassununga, SP, 13635-900, Brazil
| | - L E R Raspantini
- Research Center of Veterinary Toxicology (CEPTOX), Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, Av. Duque de Caxias Norte, 225, Pirassununga, SP, 13635-900, Brazil
| | - A T Gotardo
- Research Center of Veterinary Toxicology (CEPTOX), Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, Av. Duque de Caxias Norte, 225, Pirassununga, SP, 13635-900, Brazil
| | - A F C Andrade
- Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Av. Duque de Caxias Norte, 225, Pirassununga, SP, 13635-900, Brazil
| | - H S Spinosa
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, São Paulo, SP, 05508-270, Brazil
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Cordeiro F, Gonçalves V, Moreira N, Slobodticov JI, de Andrade Galvão N, de Souza Spinosa H, Bonamin LV, Bondan EF, Ciscato CHP, Barbosa CM, Bernardi MM. Ivermectin acute administration impaired the spermatogenesis and spermiogenesis of adult rats. Res Vet Sci 2017; 117:178-186. [PMID: 29288959 DOI: 10.1016/j.rvsc.2017.12.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 11/24/2017] [Accepted: 12/16/2017] [Indexed: 11/27/2022]
Abstract
Ivermectin (IVM) is an antiparasitic agent widely used in agricultural, domestic animals and in human clinical practice. In the present study, the temporal effects of therapeutic doses of IVM in the morphometric and histological assessment of testis were studied to verify if IVM acute administration impaired the spermatogenesis and spermiogenesis of adult rats, if these effects are reversible. The testosterone levels and the plasmatic IVM levels were assessed. The results show: 1) IVM acute exposure, mainly in the higher dose, reduced the testicular volume, the tubular diameter and the germinal epithelium height; 2) no interferences on Leydig cells frequency; 3) histological studies show that tubular sections containing several histological changes indicative of spermatogenesis interruption, such as disorganization of germinal epithelium, vacuolar degeneration of the germ cells and sloughing of cells into the tubular lumen; 4) no differences in testosterone levels; 5) The IVM plasmatic levels were significantly reduced at 72h after the 0.2mg/kg. It was concluded that acute IVM impaired the spermatogenesis and spermiogenesis of rats. Probably these effects were not consequence of IVM at the Leydig cells because no effects were observed at this level. Finally, our results suggest that some testicular effects are reversible and correlated with the plasmatic levels of IVM.
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Affiliation(s)
- Flora Cordeiro
- Graduate Program of Environmental and Experimental Pathology, Paulista University, Rua Dr. Bacelar, 1212, 04026-002 São Paulo, SP, Brazil
| | - Vagner Gonçalves
- Graduate Program of Experimental and Comparative Pathology, Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, São Paulo, SP 05508-270, Brazil
| | - Natalia Moreira
- Graduate Program of Experimental and Comparative Pathology, Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, São Paulo, SP 05508-270, Brazil
| | - João Iosif Slobodticov
- Graduate Program of Environmental and Experimental Pathology, Paulista University, Rua Dr. Bacelar, 1212, 04026-002 São Paulo, SP, Brazil
| | - Nathalia de Andrade Galvão
- Graduate Program of Environmental and Experimental Pathology, Paulista University, Rua Dr. Bacelar, 1212, 04026-002 São Paulo, SP, Brazil
| | - Helenice de Souza Spinosa
- Graduate Program of Experimental and Comparative Pathology, Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, São Paulo, SP 05508-270, Brazil
| | - Leoni Villano Bonamin
- Graduate Program of Environmental and Experimental Pathology, Paulista University, Rua Dr. Bacelar, 1212, 04026-002 São Paulo, SP, Brazil
| | - Eduardo Fernandes Bondan
- Graduate Program of Environmental and Experimental Pathology, Paulista University, Rua Dr. Bacelar, 1212, 04026-002 São Paulo, SP, Brazil
| | - Claudia Helena Pastor Ciscato
- Pesticide Residues Laboratory, Biological Institute, Av. Conselheiro Rodrigues Alves, 1252, São Paulo, SP 04014-002, Brazil
| | - Cláudia Maria Barbosa
- Pesticide Residues Laboratory, Biological Institute, Av. Conselheiro Rodrigues Alves, 1252, São Paulo, SP 04014-002, Brazil
| | - Maria Martha Bernardi
- Graduate Program of Environmental and Experimental Pathology, Paulista University, Rua Dr. Bacelar, 1212, 04026-002 São Paulo, SP, Brazil.
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Ivermectin reduces motor coordination, serum testosterone, and central neurotransmitter levels but does not affect sexual motivation in male rats. Reprod Toxicol 2017; 74:195-203. [DOI: 10.1016/j.reprotox.2017.10.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 10/03/2017] [Accepted: 10/17/2017] [Indexed: 12/17/2022]
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Meerts SH, Strnad HK, Schairer RS. Paced mating behavior is affected by clitoral-vaginocervical lidocaine application in combination with sexual experience. Physiol Behav 2015; 140:222-9. [DOI: 10.1016/j.physbeh.2014.12.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 12/23/2014] [Accepted: 12/24/2014] [Indexed: 11/25/2022]
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9
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Ivermectin reduces sexual behavior in female rats. Neurotoxicol Teratol 2014; 43:33-8. [DOI: 10.1016/j.ntt.2014.03.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 03/14/2014] [Accepted: 03/17/2014] [Indexed: 11/21/2022]
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Ferri R, Todon e Silva A, Cabral D, Moreira N, Spinosa H, Bernardi M. Doramectin reduces sexual behavior and penile erection in male rats. Neurotoxicol Teratol 2013; 39:63-8. [DOI: 10.1016/j.ntt.2013.07.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Revised: 07/19/2013] [Accepted: 07/22/2013] [Indexed: 11/27/2022]
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Kyratsas C, Dalla C, Anderzhanova E, Polissidis A, Kokras N, Konstantinides K, Papadopoulou‐Daifoti Z. Experimental Evidence for Sildenafil's Action in the Central Nervous System: Dopamine and Serotonin Changes in the Medial Preoptic Area and Nucleus Accumbens During Sexual Arousal. J Sex Med 2013; 10:719-29. [DOI: 10.1111/j.1743-6109.2012.03000.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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