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Brouwer A, Carhart‐Harris RL, Raison CL. Psychotomimetic compensation versus sensitization. Pharmacol Res Perspect 2024; 12:e1217. [PMID: 38923845 PMCID: PMC11194300 DOI: 10.1002/prp2.1217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Accepted: 05/08/2024] [Indexed: 06/28/2024] Open
Abstract
It is a paradox that psychotomimetic drugs can relieve symptoms that increase risk of and cooccur with psychosis, such as attention and motivational deficits (e.g., amphetamines), pain (e.g., cannabis) and symptoms of depression (e.g., psychedelics, dissociatives). We introduce the ideas of psychotomimetic compensation and psychotomimetic sensitization to explain this paradox. Psychotomimetic compensation refers to a short-term stressor or drug-induced compensation against stress that is facilitated by engagement of neurotransmitter/modulator systems (endocannabinoid, serotonergic, glutamatergic and dopaminergic) that mediate the effects of common psychotomimetic drugs. Psychotomimetic sensitization occurs after repeated exposure to stress and/or drugs and is evidenced by the gradual intensification and increase of psychotic-like experiences over time. Theoretical and practical implications of this model are discussed.
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Affiliation(s)
- Ari Brouwer
- Department of Human Development and Family Studies, School of Human EcologyUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - Robin L. Carhart‐Harris
- Department of Neurology and PsychiatryUniversity of California San FranciscoSan FranciscoCaliforniaUSA
| | - Charles L. Raison
- Department of Psychiatry, School of Medicine and Public HealthUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
- Vail Health Behavioral Health Innovation CenterVailColoradoUSA
- Center for the Study of Human HealthEmory UniversityAtlantaGeorgiaUSA
- Department of Spiritual HealthEmory University Woodruff Health Sciences CenterAtlantaGeorgiaUSA
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2
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Liu Q, Radchenko M, Špinka M. Disentangling developmental effects of play aspects in rat rough-and-tumble play. Biol Lett 2024; 20:20240037. [PMID: 38808945 DOI: 10.1098/rsbl.2024.0037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Accepted: 04/12/2024] [Indexed: 05/30/2024] Open
Abstract
Animal play encompasses a variety of aspects, with kinematic and social aspects being particularly prevalent in mammalian play behaviour. While the developmental effects of play have been increasingly documented in recent decades, understanding the specific contributions of different play aspects remains crucial to understand the function and evolutionary benefit of animal play. In our study, developing male rats were exposed to rough-and-tumble play selectively reduced in either the kinematic or the social aspect. We then assessed the developmental effects of reduced play on their appraisal of standardized human-rat play ('tickling') by examining their emission of 50 kHz ultrasonic vocalizations (USVs). Using a deep learning framework, we efficiently classified five subtypes of these USVs across six behavioural states. Our results revealed that rats lacking the kinematic aspect in play emitted fewer USVs during tactile contacts by human and generally produced fewer USVs of positive valence compared with control rats. Rats lacking the social aspect did not differ from the control and the kinematically reduced group. These results indicate aspects of play have different developmental effects, underscoring the need for researchers to further disentangle how each aspect affects animals.
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Affiliation(s)
- Quanxiao Liu
- Department of Ethology and Companion Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences , Prague, Czechia
| | - Mariia Radchenko
- Department of Ethology and Companion Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences , Prague, Czechia
| | - Marek Špinka
- Department of Ethology and Companion Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences , Prague, Czechia
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3
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Bijlsma A, Birza EE, Pimentel TC, Maranus JPM, van Gaans MJJM, Lozeman-van T Klooster JG, Baars AJM, Achterberg EJM, Lesscher HMB, Wierenga CJ, Vanderschuren LJMJ. Opportunities for risk-taking during play alters cognitive performance and prefrontal inhibitory signalling in rats of both sexes. Eur J Neurosci 2024; 59:2748-2765. [PMID: 38511534 DOI: 10.1111/ejn.16313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 02/22/2024] [Indexed: 03/22/2024]
Abstract
Social play behaviour is a rewarding activity that can entail risks, thus allowing young individuals to test the limits of their capacities and to train their cognitive and emotional adaptability to challenges. Here, we tested in rats how opportunities for risk-taking during play affect the development of cognitive and emotional capacities and medial prefrontal cortex (mPFC) function, a brain structure important for risk-based decision making. Male and female rats were housed socially or social play-deprived (SPD) between postnatal day (P)21 and P42. During this period, half of both groups were daily exposed to a high-risk play environment. Around P85, all rats were tested for cognitive performance and emotional behaviour after which inhibitory currents were recorded in layer 5 pyramidal neurons in mPFC slices. We show that playing in a high-risk environment altered cognitive flexibility in both sexes and improved behavioural inhibition in males. High-risk play altered anxiety-like behaviour in the elevated plus maze in males and in the open field in females, respectively. SPD affected cognitive flexibility in both sexes and decreased anxiety-like behaviour in the elevated plus maze in females. We found that synaptic inhibitory currents in the mPFC were increased in male, but not female, rats after high-risk play, while SPD lowered prefrontal cortex (PFC) synaptic inhibition in both sexes. Together, our data show that exposure to risks during play affects the development of cognition, emotional behaviour and inhibition in the mPFC. Furthermore, our study suggests that the opportunity to take risks during play cannot substitute for social play behaviour.
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Affiliation(s)
- Ate Bijlsma
- Department of Biology, Faculty of Science, Utrecht University, Utrecht, The Netherlands
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Evelien E Birza
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Tara C Pimentel
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Janneke P M Maranus
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Marieke J J M van Gaans
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - José G Lozeman-van T Klooster
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Annemarie J M Baars
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - E J Marijke Achterberg
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Heidi M B Lesscher
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Corette J Wierenga
- Department of Biology, Faculty of Science, Utrecht University, Utrecht, The Netherlands
- Donders Institute and Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Louk J M J Vanderschuren
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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4
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Burghardt GM, Pellis SM, Schank JC, Smaldino PE, Vanderschuren LJMJ, Palagi E. Animal play and evolution: Seven timely research issues about enigmatic phenomena. Neurosci Biobehav Rev 2024; 160:105617. [PMID: 38458553 DOI: 10.1016/j.neubiorev.2024.105617] [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: 12/13/2023] [Revised: 02/06/2024] [Accepted: 03/02/2024] [Indexed: 03/10/2024]
Abstract
The nature of play in animals has been long debated, but progress is being made in characterizing play and its variants, documenting its distribution across vertebrate and invertebrate taxa, describing its mechanisms and development, and proposing testable theories about its origins, evolution, and adaptive functions. To achieve a deeper understanding of the functions and evolution of play, integrative and conceptual advances are needed in neuroscience, computer modeling, phylogenetics, experimental techniques, behavior development, and inter- and intra-specific variation. The special issue contains papers documenting many of these advances. Here, we describe seven timely areas where further research is needed to understand this still enigmatic class of phenomena more fully. Growing empirical and theoretical evidence reveals that play has been crucial in the evolution of behavior and psychology but has been underestimated, if not ignored, in both empirical and theoretical areas of evolutionary biology and neuroscience. Play research has important ramifications for understanding the evolution of cognition, emotion, and culture, and research on animals can be both informative and transformative.
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Affiliation(s)
- Gordon M Burghardt
- Departments of Psychology and Ecology & Evolutionary Biology, University of Tennessee, Knoxville, TN, USA.
| | - Sergio M Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta, Canada
| | - Jeffrey C Schank
- Department of Psychology and Animal Behavior Graduate Group, University of California, Davis, CA, USA
| | - Paul E Smaldino
- Department of Cognitive and Information Sciences, University of California, Merced, CA, USA, and Santa Fe Institute, Santa Fe, NM, USA
| | - Louk J M J Vanderschuren
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - Elisabetta Palagi
- Unit of Ethology, Department of Biology, University of Pisa and Natural History Museum, University of Pisa, Pisa, Italy
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5
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Kirkland JM, Edgar EL, Patel I, Feustel P, Belin S, Kopec AM. Synaptic pruning during adolescence shapes adult social behavior in both males and females. Dev Psychobiol 2024; 66:e22473. [PMID: 38433422 DOI: 10.1002/dev.22473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 01/23/2024] [Accepted: 01/30/2024] [Indexed: 03/05/2024]
Abstract
Evolutionarily conserved, peer-directed social behaviors are essential to participate in many aspects of human society. These behaviors directly impact psychological, physiological, and behavioral maturation. Adolescence is an evolutionarily conserved period during which reward-related behaviors, including social behaviors, develop via developmental plasticity in the mesolimbic dopaminergic "reward" circuitry of the brain. The nucleus accumbens (NAc) is an intermediate reward relay center that develops during adolescence and mediates both social behaviors and dopaminergic signaling. In several developing brain regions, synaptic pruning mediated by microglia, the resident immune cells of the brain, is important for normal behavioral development. We previously demonstrated that during adolescence, in rats, microglial synaptic pruning shapes the development of NAc and social play behavior in males and females. In this report, we hypothesize that interrupting microglial pruning in NAc during adolescence will have persistent effects on male and female social behavior in adulthood. We found that inhibiting microglial pruning in the NAc during adolescence had different effects on social behavior in males and females. In males, inhibiting pruning increased familiar exploration and increased nonsocial contact. In females, inhibiting pruning did not change familiar exploration behavior but increased active social interaction. This leads us to infer that naturally occurring NAc pruning serves to reduce social behaviors toward a familiar conspecific in both males and females.
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Affiliation(s)
- Julia M Kirkland
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, USA
| | - Erin L Edgar
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, USA
| | - Ishan Patel
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, USA
| | - Paul Feustel
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, USA
| | - Sophie Belin
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, USA
| | - Ashley M Kopec
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, USA
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Ham JR, Szabo M, Annor-Bediako J, Stark RA, Iwaniuk AN, Pellis SM. Quality not quantity: Deficient juvenile play experiences lead to altered medial prefrontal cortex neurons and sociocognitive skill deficits. Dev Psychobiol 2024; 66:e22456. [PMID: 38388195 DOI: 10.1002/dev.22456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 12/18/2023] [Accepted: 12/19/2023] [Indexed: 02/24/2024]
Abstract
Reduced play experience over the juvenile period leads to adults with impoverished social skills and to anatomical and physiological aberrations of the neurons found in the medial prefrontal cortex (mPFC). Even rearing rats from high-playing strains with low-playing strains show these developmental consequences. In the present study, we evaluated whether low-playing rats benefit from being reared with higher playing peers. To test this, we reared male Fischer 344 rats (F344), typically thought to be a low-playing strain, with a Long-Evans (LE) peer, a relatively high-playing strain. As juveniles, F344 rats reared with LE rats experienced less play and lower quality play compared to those reared with another F344. As adults, the F344 rats reared with LE partners exhibited poorer social skills and the pyramidal neurons of their mPFC had larger dendritic arbors than F344 rats reared with same-strain peers. These findings show that being reared with a more playful partner does not improve developmental outcomes of F344 rats, rather the discordance in the play styles of F344 and LE rats leads to poorer outcomes.
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Affiliation(s)
- Jackson R Ham
- Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta, Canada
| | - Madeline Szabo
- Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta, Canada
| | | | - Rachel A Stark
- Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta, Canada
| | - Andrew N Iwaniuk
- Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta, Canada
| | - Sergio M Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta, Canada
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7
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Curley JP, Champagne FA. Shaping the development of complex social behavior. Ann N Y Acad Sci 2023; 1530:46-63. [PMID: 37855311 DOI: 10.1111/nyas.15076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
Early life experiences can have an enduring impact on the brain and behavior, with implications for stress reactivity, cognition, and social behavior. In particular, the neural systems that contribute to the expression of social behavior are altered by early life social environments. However, paradigms that have been used to alter the social environment during development have typically focused on exposure to stress, adversity, and deprivation of species-typical social stimulation. Here, we explore whether complex social environments can shape the development of complex social behavior. We describe lab-based paradigms for studying early life social complexity in rodents that are generally focused on enriching the social and sensory experiences of the neonatal and juvenile periods of development. The impact of these experiences on social behavior and neuroplasticity is highlighted. Finally, we discuss the degree to which our current approaches for studying social behavior outcomes give insight into "complex" social behavior and how social complexity can be better integrated into lab-based methodologies.
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Affiliation(s)
- James P Curley
- Department of Psychology, The University of Texas at Austin, Austin, Texas, USA
| | - Frances A Champagne
- Department of Psychology, The University of Texas at Austin, Austin, Texas, USA
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8
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Liu Q, Ilčíková T, Radchenko M, Junková M, Špinka M. Effects of reduced kinematic and social play experience on affective appraisal of human-rat play in rats. Front Zool 2023; 20:34. [PMID: 37821980 PMCID: PMC10568924 DOI: 10.1186/s12983-023-00512-0] [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: 06/22/2023] [Accepted: 09/30/2023] [Indexed: 10/13/2023] Open
Abstract
BACKGROUND Play is a common and developmentally important behaviour in young mammals. Specifically in Norway rats (Rattus norvegicus), reduced opportunity to engage in rough-and-tumble (RT) play has been associated with impaired development in social competence. However, RT play is a complex behaviour having both a kinematic aspect (i.e., performing complex 3D manoeuvres during play fights) and a social aspect (interacting with a playful partner). There has been little research so far on disentangling the two aspects in RT play, especially on how these two aspects affect the affective appraisal of the intense physical contact during play. RESULTS To examine the developmental effects of kinematic and social play reduction on affective appraisal in rats, we subjected male Long-Evans rats from 21 days old to RT play experience that was reduced either kinematically (through playing in a low ceiling environment) or socially (through playing with a less playful Fischer-344 rat). Starting at 35 days, we measured their production of positively (50-kHz) and negatively (22-kHz) valenced ultrasonic vocalisations (USVs) in a 2-min standardised human-rat play procedure that mimicked the playful sequences of nape contact, pinning, and belly stimulation ('tickling') for ten days. We hypothesised that the rats with kinematically or socially reduced play would perceive the 'tickling' less positively and thus emit positive ultrasonic vocalisations at lower rates compared to control rats with non-reduced play experience. Our results confirmed that each of the treatments reduced play differently: while the kinematic reduction abolished playful pinnings entirely, the social reduction decreased the pinnings and made play highly asymmetric. During the tickling procedure, rats mostly produced 50 kHz USV, indicating that they appraised the procedure as positive. There was a wide inter individual variance and high individual consistency in rats' USV responses to 'tickling'. Crucially, neither the kinematically nor the socially reduced play experience affected either type of USV production when rats were 'tickled'. CONCLUSIONS This finding indicates that the ability to appraise play-like interactions as positive remains unaffected even when the kinematic or the social aspect of play experience was substantially curtailed.
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Affiliation(s)
- Quanxiao Liu
- Department of Ethology and Companion Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague, Czechia.
| | - Tereza Ilčíková
- Department of Ethology and Companion Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague, Czechia
| | - Mariia Radchenko
- Department of Ethology and Companion Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague, Czechia
| | - Markéta Junková
- Department of Ethology and Companion Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague, Czechia
| | - Marek Špinka
- Department of Ethology and Companion Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague, Czechia
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Achterberg EJM, Burke CJ, Pellis SM. When the individual comes into play: The role of self and the partner in the dyadic play fighting of rats. Behav Processes 2023; 212:104933. [PMID: 37643663 DOI: 10.1016/j.beproc.2023.104933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 08/11/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023]
Abstract
Social play in rats is rewarding and important for the development of brain and social skills. There are differences in the amount of play behavior displayed among individuals, with earlier studies suggesting that, despite variation across trials, individual differences tend to be consistent. In the present study, juvenile Lister-hooded rats were paired with a different, unfamiliar same-sex partner on three days and based on the amount of play each individual initiated, it was characterized as a high, medium or low player. Using this categorization, we explored three features related to individual differences. First, we show that by increasing the number of test days from two, as was done in a previous study (Lesscher et al., 2021), to three, characterization was effectively improved. Secondly, while the earlier study only used males, the present study showed that both sexes exhibit a similar pattern of individual differences in the degree of playfulness. Even though low players consistently initiated less play than medium and high players, all rats varied in how much play they initiated from one trial to the next. Thirdly, we assessed two potential mechanisms by which the playfulness of one rat can modify the level of playfulness of the other rat (i.e., emotional contagion vs homeostasis). Analyses of individuals' contribution to the play of dyads suggest that rats consistently adjust their play behavior depending on the behavior displayed by the partner. Since this adjustment can be positive or negative, our data support a homeostatic mechanism, whereby individuals increase or decrease the amount of play they initiate, which results in the experience of an overall stable pattern of play across trials. Future research will investigate the neural bases for individual differences in play and how rats maintain a preferred level of play.
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Affiliation(s)
- E J M Achterberg
- Behavioural Neuroscience Division, Department of Population Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands.
| | - C J Burke
- Department of Neuroscience, University of Lethbridge, Lethbridge, Canada; Department of Pharmacology, McGill University, Montreal, Canada
| | - S M Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, Canada
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10
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Achterberg EJM, Vanderschuren LJMJ. The neurobiology of social play behaviour: Past, present and future. Neurosci Biobehav Rev 2023; 152:105319. [PMID: 37454882 DOI: 10.1016/j.neubiorev.2023.105319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 07/07/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
Social play behaviour is a highly energetic and rewarding activity that is of great importance for the development of brain and behaviour. Social play is abundant during the juvenile and early adolescent phases of life, and it occurs in most mammalian species, as well as in certain birds and reptiles. To date, the majority of research into the neural mechanisms of social play behaviour has been performed in male rats. In the present review we summarize studies on the neurobiology of social play behaviour in rats, including work on pharmacological and genetic models for autism spectrum disorders, early life manipulations and environmental factors that influence play in rats. We describe several recent developments that expand the field, and highlight outstanding questions that may guide future studies.
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Affiliation(s)
- E J Marijke Achterberg
- Dept. of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands.
| | - Louk J M J Vanderschuren
- Dept. of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands.
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Bogdan R, Kayumova R, Schwarting RKW, Wöhr M, Kisko TM. Wildtype peers rescue social play and 50-kHz ultrasonic vocalization deficits in juvenile female Cacna1c heterozygous rats. Front Behav Neurosci 2023; 17:1190272. [PMID: 37600756 PMCID: PMC10435996 DOI: 10.3389/fnbeh.2023.1190272] [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: 03/20/2023] [Accepted: 06/23/2023] [Indexed: 08/22/2023] Open
Abstract
Background Healthy brain development depends on early social practices and experiences. The risk gene CACNA1C is implicated in numerous neuropsychiatric disorders, in which key characteristics include deficits in social functioning and communication. Recently, we reported sex-dependent impairments in social behavior and ultrasonic vocalizations (USV) in juvenile heterozygous Cacna1c+/- (HET) rats. Specifically, HET females displayed increases in rough-and-tumble play that eliminated the typically observed sex difference between male and female rats. Interestingly, female wild-type Cacna1c+/+ (WT) pairs also showed a similar increase in social play when housed with HET females, suggesting their behavior may be influenced by HET cage mates. This indicates that the genetic makeup of the social environment related to Cacna1c can influence social play, yet systematic studies are lacking. Methods In the present study, we housed juvenile females in MIXED- or SAME-genotype cages and tested them in a social play paradigm with a same- and opposite-genotype partner. Results The results show that the early social environment and the genotype of the play partner influence social play and 50-kHz USV emission. Experience with a WT play partner appears necessary for HET females to show comparable levels of play and 50-kHz USV emission. Same-genotype HET pairs played less and emitted fewer 50-kHz USV than same-genotype WT or opposite-genotype pairs; however, we found that the decrease in social play and 50-kHz USV in HET pairs can be rescued by playing with a WT partner. The effect was particularly prominent when the first play partner was WT, as we found it increased play and 50-kHz USV emission in all subsequent interactions with ensuing partners. Conclusion These findings suggest that the genetic makeup related to the social environment and/or social peers influences social play in Cacna1c+/- haploinsufficient rats. Specifically, our results show that WT peers can rescue behavior and communication alterations in Cacna1c female rats. Our findings have important implications because they show that the genetic makeup of the social environment can divulge phenotypic changes in genetic rat models of neuropsychiatric disorders.
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Affiliation(s)
- Rebecca Bogdan
- Behavioral Neuroscience, Experimental and Biological Psychology, Faculty of Psychology, Philipps-University Marburg, Marburg, Germany
| | - Rukhshona Kayumova
- Behavioral Neuroscience, Experimental and Biological Psychology, Faculty of Psychology, Philipps-University Marburg, Marburg, Germany
| | - Rainer K. W. Schwarting
- Behavioral Neuroscience, Experimental and Biological Psychology, Faculty of Psychology, Philipps-University Marburg, Marburg, Germany
- Centre for Mind, Brain, and Behavior (CMBB), Philipps-University Marburg, Marburg, Germany
| | - Markus Wöhr
- Behavioral Neuroscience, Experimental and Biological Psychology, Faculty of Psychology, Philipps-University Marburg, Marburg, Germany
- Centre for Mind, Brain, and Behavior (CMBB), Philipps-University Marburg, Marburg, Germany
- Social and Affective Neuroscience Research Group, Laboratory of Biological Psychology, Research Unit Brain and Cognition, Faculty of Psychology and Educational Sciences, KU Leuven, Leuven, Belgium
- Leuven Brain Institute, KU Leuven, Leuven, Belgium
| | - Theresa M. Kisko
- Behavioral Neuroscience, Experimental and Biological Psychology, Faculty of Psychology, Philipps-University Marburg, Marburg, Germany
- Centre for Mind, Brain, and Behavior (CMBB), Philipps-University Marburg, Marburg, Germany
- Social and Affective Neuroscience Research Group, Laboratory of Biological Psychology, Research Unit Brain and Cognition, Faculty of Psychology and Educational Sciences, KU Leuven, Leuven, Belgium
- Leuven Brain Institute, KU Leuven, Leuven, Belgium
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12
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Perini I, Mayo LM, Capusan AJ, Paul ER, Yngve A, Kampe R, Gauffin E, Mazurka R, Ghafouri B, Stensson N, Asratian A, Hamilton JP, Kastbom Å, Gustafsson PA, Heilig M. Resilience to substance use disorder following childhood maltreatment: association with peripheral biomarkers of endocannabinoid function and neural indices of emotion regulation. Mol Psychiatry 2023; 28:2563-2571. [PMID: 37041416 PMCID: PMC10611562 DOI: 10.1038/s41380-023-02033-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 02/21/2023] [Accepted: 03/10/2023] [Indexed: 04/13/2023]
Abstract
Childhood maltreatment (CM) is a risk factor for substance use disorders (SUD) in adulthood. Understanding the mechanisms by which people are susceptible or resilient to developing SUD after exposure to CM is important for improving intervention. This case-control study investigated the impact of prospectively assessed CM on biomarkers of endocannabinoid function and emotion regulation in relation to the susceptibility or resilience to developing SUD. Four groups were defined across the dimensions of CM and lifetime SUD (N = 101 in total). After screening, participants completed two experimental sessions on separate days, aimed at assessing the behavioral, physiological, and neural mechanisms involved in emotion regulation. In the first session, participants engaged in tasks assessing biochemical (i.e., cortisol, endocannabinoids), behavioral, and psychophysiological indices of stress and affective reactivity. During the second session, the behavioral and brain mechanisms associated with emotion regulation and negative affect were investigated using magnetic resonance imaging. CM-exposed adults who did not develop SUD, operationally defined as resilient to developing SUD, had higher peripheral levels of the endocannabinoid anandamide at baseline and during stress exposure, compared to controls. Similarly, this group had increased activity in salience and emotion regulation regions in task-based measures of emotion regulation compared to controls, and CM-exposed adults with lifetime SUD. At rest, the resilient group also showed significantly greater negative connectivity between ventromedial prefrontal cortex and anterior insula compared to controls and CM-exposed adults with lifetime SUD. Collectively, these peripheral and central findings point to mechanisms of potential resilience to developing SUD after documented CM exposure.
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Affiliation(s)
- Irene Perini
- Center for Social and Affective Neuroscience, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
- Center for Medical Image Science and Visualization (CMIV), Linköping, Sweden.
| | - Leah M Mayo
- Center for Social and Affective Neuroscience, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
- Center for Medical Image Science and Visualization (CMIV), Linköping, Sweden.
| | - Andrea J Capusan
- Center for Social and Affective Neuroscience, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Department of Psychiatry, Linköping University Hospital, Linköping, Sweden
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Elisabeth R Paul
- Center for Social and Affective Neuroscience, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Center for Medical Image Science and Visualization (CMIV), Linköping, Sweden
| | - Adam Yngve
- Center for Social and Affective Neuroscience, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Center for Medical Image Science and Visualization (CMIV), Linköping, Sweden
| | - Robin Kampe
- Center for Social and Affective Neuroscience, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Center for Medical Image Science and Visualization (CMIV), Linköping, Sweden
| | - Emelie Gauffin
- Center for Social and Affective Neuroscience, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Department of Psychiatry, Linköping University Hospital, Linköping, Sweden
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Raegan Mazurka
- Center for Social and Affective Neuroscience, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Bijar Ghafouri
- Pain and Rehabilitation Centre, Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| | - Niclas Stensson
- Pain and Rehabilitation Centre, Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| | - Anna Asratian
- Center for Social and Affective Neuroscience, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - J Paul Hamilton
- Department of Biological and Medical Psychology University of Bergen, Bergen, Norway
| | - Åsa Kastbom
- Center for Social and Affective Neuroscience, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Department of Psychiatry, Linköping University Hospital, Linköping, Sweden
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Per A Gustafsson
- Center for Social and Affective Neuroscience, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Department of Child and Adolescent Psychiatry, Linköping University, Linköping, Sweden
| | - Markus Heilig
- Center for Social and Affective Neuroscience, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Center for Medical Image Science and Visualization (CMIV), Linköping, Sweden
- Department of Psychiatry, Linköping University Hospital, Linköping, Sweden
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13
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Kirkland JM, Edgar EL, Patel I, Kopec AM. Impaired microglia-mediated synaptic pruning in the nucleus accumbens during adolescence results in persistent dysregulation of familiar, but not novel social interactions in sex-specific ways. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.02.539115. [PMID: 37205324 PMCID: PMC10187149 DOI: 10.1101/2023.05.02.539115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Evolutionarily conserved, peer-directed social behaviors are essential to participate in many aspects of human society. These behaviors directly impact psychological, physiological, and behavioral maturation. Adolescence is an evolutionarily conserved period during which reward-related behaviors, including social behaviors, develop via developmental plasticity in the mesolimbic dopaminergic 'reward' circuitry of the brain. The nucleus accumbens (NAc) is an intermediate reward relay center that develops during adolescence and mediates both social behaviors and dopaminergic signaling. In several developing brain regions, synaptic pruning mediated by microglia, the resident immune cells of the brain, is important for normal behavioral development. In rats, we previously demonstrated that microglial synaptic pruning also mediates NAc and social development during sex-specific adolescent periods and via sex-specific synaptic pruning targets. In this report, we demonstrate that interrupting microglial pruning in NAc during adolescence persistently dysregulates social behavior towards a familiar, but not novel social partner in both sexes, via sex-specific behavioral expression. This leads us to infer that naturally occurring NAc pruning serves to reduce social behaviors primarily directed toward a familiar conspecific in both sexes, but in sex-specific ways.
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Affiliation(s)
- Julia M. Kirkland
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College
| | - Erin L. Edgar
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College
| | - Ishan Patel
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College
| | - Ashley M. Kopec
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College
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14
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Cooper MA, Grizzell JA, Whitten CJ, Burghardt GM. Comparing the ontogeny, neurobiology, and function of social play in hamsters and rats. Neurosci Biobehav Rev 2023; 147:105102. [PMID: 36804399 PMCID: PMC10023430 DOI: 10.1016/j.neubiorev.2023.105102] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/26/2023] [Accepted: 02/14/2023] [Indexed: 02/19/2023]
Abstract
Syrian hamsters show complex social play behavior and provide a valuable animal model for delineating the neurobiological mechanisms and functions of social play. In this review, we compare social play behavior of hamsters and rats and underlying neurobiological mechanisms. Juvenile rats play by competing for opportunities to pin one another and attack their partner's neck. A broad set of cortical, limbic, and striatal regions regulate the display of social play in rats. In hamsters, social play is characterized by attacks to the head in early puberty, which gradually transitions to the flanks in late puberty. The transition from juvenile social play to adult hamster aggression corresponds with engagement of neural ensembles controlling aggression. Play deprivation in rats and hamsters alters dendritic morphology in mPFC neurons and impairs flexible, context-dependent behavior in adulthood, which suggests these animals may have converged on a similar function for social play. Overall, dissecting the neurobiology of social play in hamsters and rats can provide a valuable comparative approach for evaluating the function of social play.
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Affiliation(s)
- Matthew A Cooper
- Department of Psychology, University of Tennessee Knoxville, Knoxville, TN, USA.
| | - J Alex Grizzell
- Neuroscience and Behavioral Biology, Emory University, Atlanta, GA, USA; Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, CO, USA
| | - Conner J Whitten
- Department of Psychology, University of Tennessee Knoxville, Knoxville, TN, USA
| | - Gordon M Burghardt
- Department of Psychology, University of Tennessee Knoxville, Knoxville, TN, USA; Department of Ecology & Evolutionary Biology, University of Tennessee Knoxville, Knoxville, TN, USA
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15
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Adolescent raloxifene treatment in females prevents cognitive deficits in a neurodevelopmental rodent model of schizophrenia. Behav Brain Res 2023; 441:114276. [PMID: 36574844 DOI: 10.1016/j.bbr.2022.114276] [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: 09/01/2022] [Revised: 12/19/2022] [Accepted: 12/21/2022] [Indexed: 12/25/2022]
Abstract
The existence of sex differences in schizophrenia is a well documented phenomenon which led to the hypothesis that female sex hormones are neuroprotective and hence responsible for the more favorable disease characteristics seen in women. The current study sought to investigate the effects of estrogen-like agents administered during early adolescence on behavioral outcomes in adulthood using the neurodevelopmental maternal immune activation (MIA) rodent model of schizophrenia. Female MIA offspring were administered during the asymptomatic period of adolescence with either 17β-estradiol, raloxifene or saline and were tested in late adolescence and adulthood for schizophrenia-related behavioral performance. We report here that whereas adult female MIA offspring exhibited cognitive deficits in the form of retarded spatial learning, the administration of raloxifene during adolescence was sufficient in preventing these deficits and resulted in intact performance in the MIA group.
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16
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Gunst N, Pellis SM, Wandia IN, Leca JB. A tool to act blind? Object-assisted eye-covering as a self-handicapping behavior and social play signal in Balinese long-tailed macaques. Anim Cogn 2023; 26:639-654. [PMID: 36306040 DOI: 10.1007/s10071-022-01707-4] [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] [Received: 06/13/2022] [Revised: 10/18/2022] [Accepted: 10/20/2022] [Indexed: 11/28/2022]
Abstract
Self-handicapping behaviors evolved as honest signals that reliably reflect the quality of their performers. In playful activities, self-handicapping is described as intentionally and unnecessarily putting oneself into disadvantageous positions and situations. Self-handicapping during play may allow individuals to learn to cope with unexpected events by improving sensori-motor coordination, as well as function as a play solicitation signal. One such self-handicapping behavior involves moving about while deliberately covering one's eyes. We conducted a quantitative study of object-assisted eye-covering (OAEC) in a population of free-ranging Balinese macaques. After evaluating the frequency, form, distribution, and context of OAEC, we measured the responses this behavior elicited (1) in the performers with a focus on sensori-motor self-handicapping, and (2) in their conspecifics, with an emphasis on whether, and if so how, OAEC may facilitate social play. Our data provided some support for several hypotheses: OAEC is a sensori-motor self-handicapping behavior, an attention-getting cue, a social play signal, and a socially self-handicapping tactic during social play. We discuss our results from the perspective of tool-assisted self-handicapping behavior, propose a scenario to account for the emergence of this behavioral innovation, and speculate on the cultural nature of OAEC.
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Affiliation(s)
- Noëlle Gunst
- Department of Psychology, University of Lethbridge, Lethbridge, Canada.
| | - Sergio M Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, Canada
| | - I Nengah Wandia
- Faculty of Veterinary Medicine, Udayana University, Bukit Jimbaran, Bali, Indonesia
| | - Jean-Baptiste Leca
- Department of Psychology, University of Lethbridge, Lethbridge, Canada.,School of Natural and Engineering Sciences, National Institute of Advanced Studies, Bangalore, India
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17
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Loh MK, Stickling C, Schrank S, Hanshaw M, Ritger AC, Dilosa N, Finlay J, Ferrara NC, Rosenkranz JA. Liposaccharide-induced sustained mild inflammation fragments social behavior and alters basolateral amygdala activity. Psychopharmacology (Berl) 2023; 240:647-671. [PMID: 36645464 DOI: 10.1007/s00213-023-06308-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 01/02/2023] [Indexed: 01/17/2023]
Abstract
RATIONALE Conditions with sustained low-grade inflammation have high comorbidity with depression and anxiety and are associated with social withdrawal. The basolateral amygdala (BLA) is critical for affective and social behaviors and is sensitive to inflammatory challenges. Large systemic doses of lipopolysaccharide (LPS) initiate peripheral inflammation, increase BLA neuronal activity, and disrupt social and affective measures in rodents. However, LPS doses commonly used in behavioral studies are high enough to evoke sickness syndrome, which can confound interpretation of amygdala-associated behaviors. OBJECTIVES AND METHODS The objectives of this study were to find a LPS dose that triggers mild peripheral inflammation but not observable sickness syndrome in adult male rats, to test the effects of sustained mild inflammation on BLA and social behaviors. To accomplish this, we administered single doses of LPS (0-100 μg/kg, intraperitoneally) and measured open field behavior, or repeated LPS (5 μg/kg, 3 consecutive days), and measured BLA neuronal firing, social interaction, and elevated plus maze behavior. RESULTS Repeated low-dose LPS decreased BLA neuron firing rate but increased the total number of active BLA neurons. Repeated low-dose LPS also caused early disengagement during social bouts and less anogenital investigation and an overall pattern of heightened social caution associated with reduced gain of social familiarity over the course of a social session. CONCLUSIONS These results provide evidence for parallel shifts in social interaction and amygdala activity caused by prolonged mild inflammation. This effect of inflammation may contribute to social symptoms associated with comorbid depression and chronic inflammatory conditions.
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Affiliation(s)
- Maxine K Loh
- Discipline of Cellular and Molecular Pharmacology, Department of Foundational Sciences and Humanities, Chicago Medical School, Rosalind Franklin University of Medicine and Science, IL, 60064, North Chicago, USA.,Center for Neurobiology of Stress Resilience and Psychiatric Disorders, Rosalind Franklin University of Medicine and Science, North Chicago, IL, USA
| | - Courtney Stickling
- Center for Neurobiology of Stress Resilience and Psychiatric Disorders, Rosalind Franklin University of Medicine and Science, North Chicago, IL, USA
| | - Sean Schrank
- Discipline of Cellular and Molecular Pharmacology, Department of Foundational Sciences and Humanities, Chicago Medical School, Rosalind Franklin University of Medicine and Science, IL, 60064, North Chicago, USA.,Discipline of Neuroscience, Department of Foundational Sciences and Humanities, Chicago Medical School, Rosalind Franklin University of Medicine and Science, IL, North Chicago, USA
| | - Madison Hanshaw
- Discipline of Cellular and Molecular Pharmacology, Department of Foundational Sciences and Humanities, Chicago Medical School, Rosalind Franklin University of Medicine and Science, IL, 60064, North Chicago, USA.,Center for Neurobiology of Stress Resilience and Psychiatric Disorders, Rosalind Franklin University of Medicine and Science, North Chicago, IL, USA
| | - Alexandra C Ritger
- Discipline of Cellular and Molecular Pharmacology, Department of Foundational Sciences and Humanities, Chicago Medical School, Rosalind Franklin University of Medicine and Science, IL, 60064, North Chicago, USA.,Discipline of Neuroscience, Department of Foundational Sciences and Humanities, Chicago Medical School, Rosalind Franklin University of Medicine and Science, IL, North Chicago, USA
| | - Naijila Dilosa
- Center for Neurobiology of Stress Resilience and Psychiatric Disorders, Rosalind Franklin University of Medicine and Science, North Chicago, IL, USA
| | - Joshua Finlay
- Center for Neurobiology of Stress Resilience and Psychiatric Disorders, Rosalind Franklin University of Medicine and Science, North Chicago, IL, USA
| | - Nicole C Ferrara
- Discipline of Cellular and Molecular Pharmacology, Department of Foundational Sciences and Humanities, Chicago Medical School, Rosalind Franklin University of Medicine and Science, IL, 60064, North Chicago, USA.,Center for Neurobiology of Stress Resilience and Psychiatric Disorders, Rosalind Franklin University of Medicine and Science, North Chicago, IL, USA
| | - J Amiel Rosenkranz
- Discipline of Cellular and Molecular Pharmacology, Department of Foundational Sciences and Humanities, Chicago Medical School, Rosalind Franklin University of Medicine and Science, IL, 60064, North Chicago, USA. .,Center for Neurobiology of Stress Resilience and Psychiatric Disorders, Rosalind Franklin University of Medicine and Science, North Chicago, IL, USA.
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18
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Stark RA, Brinkman B, Gibb RL, Iwaniuk AN, Pellis SM. Atypical play experiences in the juvenile period has an impact on the development of the medial prefrontal cortex in both male and female rats. Behav Brain Res 2023; 439:114222. [PMID: 36427590 DOI: 10.1016/j.bbr.2022.114222] [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: 08/06/2022] [Revised: 11/06/2022] [Accepted: 11/20/2022] [Indexed: 11/23/2022]
Abstract
In rats reared without play, or with limited access to play during the juvenile period, the dendrites of pyramidal neurons of the medial prefrontal cortex (mPFC) exhibit more branching than rats reared with more typical levels of play. This suggests that play is critical for pruning the dendritic arbor of these neurons. However, the rearing paradigms typically used to limit play involve physical separation from a peer or sharing a cage with an adult, causing stress that may disrupt pruning. To limit this potentially confounding source of stress, we used an alternative approach in this study: pairing playful Long Evans rats (LE) with low playing Fischer 344 (F344) rats throughout the juvenile period. We then examined the morphology of medial prefrontal cortex (mPFC) neurons, predicting that pruning should be reduced. LE rats reared with another LE rat had significantly greater pruning of mPFC pyramidal neurons compared to LE rats reared with a F344 partner. Furthermore, in previous studies, only one sex or the other was used, whereas in the present rearing paradigm, both sexes were tested, showing that play influences neuronal pruning in both. The neurons of the play deficient LE rats not only occupied more space, as determined by convex hull analyses, but the dendrites were also longer than in rats with more typical play experiences. Unlike studies using more stressful rearing paradigms, the present effects were limited to the apical dendritic projections, suggesting that the previously reported effects on the basilar dendrites may have resulted from developmental disruptions caused by stress. If correct, the present findings indicate that play experienced over the juvenile period affects how mPFC neurons develop and function.
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Affiliation(s)
- R A Stark
- University of Lethbridge, Alberta, Canada.
| | - B Brinkman
- University of Lethbridge, Alberta, Canada
| | - R L Gibb
- University of Lethbridge, Alberta, Canada
| | | | - S M Pellis
- University of Lethbridge, Alberta, Canada
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19
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Pellis SM, Pellis VC, Ham JR, Stark RA. Play fighting and the development of the social brain: The rat's tale. Neurosci Biobehav Rev 2023; 145:105037. [PMID: 36621585 DOI: 10.1016/j.neubiorev.2023.105037] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/29/2022] [Accepted: 01/03/2023] [Indexed: 01/07/2023]
Abstract
The benefits gained by young animals engaging in play fighting have been a subject of conjecture for over a hundred years. Progress in understanding the behavioral development of play fighting and the underlying neurobiology of laboratory rats has produced a coherent model that sheds light on this matter. Depriving rats of typical peer-peer play experience during the juvenile period leads to adults with socio-cognitive deficiencies and these are correlated with physiological and anatomical changes to the neurons of the prefrontal cortex, especially the medial prefrontal cortex. Detailed analysis of juvenile peer play has shown that using the abilities needed to ensure that play fighting is reciprocal is critical for attaining these benefits. Therefore, unlike that which was posited by many earlier hypotheses, play fighting does not train specific motor actions, but rather, improves a skill set that can be applied in many different social and non-social contexts. There are still gaps in the rat model that need to be understood, but the model is well-enough developed to provide a framework for broader comparative studies of mammals from diverse lineages that engage in play fighting.
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Affiliation(s)
- Sergio M Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta T1K3M4, Canada.
| | - Vivien C Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta T1K3M4, Canada
| | - Jackson R Ham
- Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta T1K3M4, Canada
| | - Rachel A Stark
- Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta T1K3M4, Canada
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20
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Marquardt AE, VanRyzin JW, Fuquen RW, McCarthy MM. Social play experience in juvenile rats is indispensable for appropriate socio-sexual behavior in adulthood in males but not females. Front Behav Neurosci 2023; 16:1076765. [PMID: 36755666 PMCID: PMC9899815 DOI: 10.3389/fnbeh.2022.1076765] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 12/07/2022] [Indexed: 01/24/2023] Open
Abstract
Social play is a dynamic and rewarding behavior abundantly expressed by most mammals during the juvenile period. While its exact function is debated, various rodent studies on the effects of juvenile social isolation suggest that participating in play is essential to appropriate behavior and reproductive success in adulthood. However, the vast majority of these studies were conducted in one sex only, a critical concern given the fact that there are known sex differences in play's expression: across nearly all species that play, males play more frequently and intensely than females, and there are qualitative sex differences in play patterns. Further limiting our understanding of the importance of play is the use of total isolation to prevent interactions with other juveniles. Here, we employed a novel cage design to specifically prevent play in rats while allowing for other forms of social interaction. We find that play deprivation during the juvenile period results in enduring sex-specific effects on later-life behavior, primarily in males. Males prevented from playing as juveniles exhibited decreased sexual behavior, hypersociability, and increased aggressiveness in adulthood, with no effects on these measures in females. Importantly, play deprivation had no effect on anxiety-like behavior, object memory, sex preference, or social recognition in either sex, showing the specificity of the identified impairments, though there were overall sex differences in many of these measures. Additionally, acute play deprivation impaired performance on a test of prosocial behavior in both sexes, indicating a difference in the motivation and/or ability to acquire this empathy-driven task. Together, these findings provide novel insight into the importance and function of juvenile social play and how this differs in males and females.
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Affiliation(s)
- Ashley E. Marquardt
- Program in Neuroscience, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Jonathan W. VanRyzin
- Department of Pharmacology, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Rebeca W. Fuquen
- Department of Pharmacology, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Margaret M. McCarthy
- Program in Neuroscience, University of Maryland School of Medicine, Baltimore, MD, United States,Department of Pharmacology, University of Maryland School of Medicine, Baltimore, MD, United States,*Correspondence: Margaret M. McCarthy
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21
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Schwitter C, Lutz B, Bindila L. Extraction and Simultaneous Quantification of Endocannabinoids and Endocannabinoid-Like Lipids in Biological Tissues. Methods Mol Biol 2023; 2576:9-19. [PMID: 36152174 DOI: 10.1007/978-1-0716-2728-0_2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Extraction and quantification of endocannabinoids from biological tissues is essential to unravel their changes under physiological and pathophysiological conditions. We describe here an analytical protocol for the extraction of endocannabinoids, anandamide (archidonoyl ethanolamide, AEA) and 2-arachidonoyl glycerol (2-AG), and endocannabinoid-like lipids such as palmitoyl ethanolamide (PEA) and oleoyl ethanolamide (OEA), as well as arachidonic acid (AA) from biological tissues using liquid-liquid extraction method and simultaneous quantification by liquid chromatography multiple reaction monitoring (LC/MRM).
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Affiliation(s)
- Claudia Schwitter
- Clinical Lipidomics Unit, Institute of Physiological Chemistry, University Medical Center of the Johannes Gutenberg University of Mainz, Mainz, Germany
| | - Beat Lutz
- Institute of Physiological Chemistry, University Medical Center of the Johannes Gutenberg University of Mainz, Mainz, Germany
| | - Laura Bindila
- Clinical Lipidomics Unit, Institute of Physiological Chemistry, University Medical Center of the Johannes Gutenberg University of Mainz, Mainz, Germany.
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22
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Bijlsma A, Omrani A, Spoelder M, Verharen JPH, Bauer L, Cornelis C, de Zwart B, van Dorland R, Vanderschuren LJMJ, Wierenga CJ. Social Play Behavior Is Critical for the Development of Prefrontal Inhibitory Synapses and Cognitive Flexibility in Rats. J Neurosci 2022; 42:8716-8728. [PMID: 36253083 PMCID: PMC9671579 DOI: 10.1523/jneurosci.0524-22.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 08/12/2022] [Accepted: 09/20/2022] [Indexed: 11/21/2022] Open
Abstract
Sensory driven activity during early life is critical for setting up the proper connectivity of the sensory cortices. We ask here whether social play behavior, a particular form of social interaction that is highly abundant during postweaning development, is equally important for setting up connections in the developing prefrontal cortex (PFC). Young male rats were deprived from social play with peers during the period in life when social play behavior normally peaks [postnatal day 21-42] (SPD rats), followed by resocialization until adulthood. We recorded synaptic currents in layer 5 cells in slices from medial PFC of adult SPD and control rats and observed that inhibitory synaptic currents were reduced in SPD slices, while excitatory synaptic currents were unaffected. This was associated with a decrease in perisomatic inhibitory synapses from parvalbumin-positive GABAergic cells. In parallel experiments, adult SPD rats achieved more reversals in a probabilistic reversal learning (PRL) task, which depends on the integrity of the PFC, by using a more simplified cognitive strategy than controls. Interestingly, we observed that one daily hour of play during SPD partially rescued the behavioral performance in the PRL, but did not prevent the decrease in PFC inhibitory synaptic inputs. Our data demonstrate the importance of unrestricted social play for the development of inhibitory synapses in the PFC and cognitive skills in adulthood and show that specific synaptic alterations in the PFC can result in a complex behavioral outcome.SIGNIFICANCE STATEMENT This study addressed the question whether social play behavior in juvenile rats contributes to functional development of the prefrontal cortex (PFC). We found that rats that had been deprived from juvenile social play (social play deprivation - SPD) showed a reduction in inhibitory synapses in the PFC and a simplified strategy to solve a complex behavioral task in adulthood. Providing one daily hour of play during SPD partially rescued the cognitive skills in these rats, but did not prevent the reduction in PFC inhibitory synapses. Our results demonstrate a key role for unrestricted juvenile social play in PFC development and emphasize the complex relation between PFC circuit connectivity and cognitive function.
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Affiliation(s)
- Ate Bijlsma
- Department of Biology, Faculty of Science, Utrecht University, 3584 CH, Utrecht, The Netherlands
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, 3584 CM, Utrecht, The Netherlands
| | - Azar Omrani
- Department of Biology, Faculty of Science, Utrecht University, 3584 CH, Utrecht, The Netherlands
- Department of Translational Neuroscience, University Medical Center Utrecht, 3584 CG, Utrecht, The Netherlands
| | - Marcia Spoelder
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, 3584 CM, Utrecht, The Netherlands
| | - Jeroen P H Verharen
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, 3584 CM, Utrecht, The Netherlands
- Department of Translational Neuroscience, University Medical Center Utrecht, 3584 CG, Utrecht, The Netherlands
| | - Lisa Bauer
- Department of Biology, Faculty of Science, Utrecht University, 3584 CH, Utrecht, The Netherlands
| | - Cosette Cornelis
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, 3584 CM, Utrecht, The Netherlands
| | - Beleke de Zwart
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, 3584 CM, Utrecht, The Netherlands
| | - René van Dorland
- Department of Biology, Faculty of Science, Utrecht University, 3584 CH, Utrecht, The Netherlands
| | - Louk J M J Vanderschuren
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, 3584 CM, Utrecht, The Netherlands
| | - Corette J Wierenga
- Department of Biology, Faculty of Science, Utrecht University, 3584 CH, Utrecht, The Netherlands
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23
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Pellis SM, Pellis VC, Ham JR, Achterberg EJM. The rough-and-tumble play of rats as a natural behavior suitable for studying the social brain. Front Behav Neurosci 2022; 16:1033999. [PMID: 36330048 PMCID: PMC9623181 DOI: 10.3389/fnbeh.2022.1033999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 10/03/2022] [Indexed: 11/25/2022] Open
Affiliation(s)
- Sergio M. Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, AB, Canada
- *Correspondence: Sergio M. Pellis
| | - Vivien C. Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, AB, Canada
| | - Jackson R. Ham
- Department of Neuroscience, University of Lethbridge, Lethbridge, AB, Canada
| | - E. J. M. Achterberg
- Division of Behavioural Neuroscience, Unit Animals in Science and Society, Department of Population Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
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Ferrara NC, Trask S, Ritger A, Padival M, Rosenkranz JA. Developmental differences in amygdala projection neuron activation associated with isolation-driven changes in social preference. Front Behav Neurosci 2022; 16:956102. [PMID: 36090658 PMCID: PMC9449454 DOI: 10.3389/fnbeh.2022.956102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Accepted: 07/26/2022] [Indexed: 11/26/2022] Open
Abstract
Adolescence is a developmental period characterized by brain maturation and changes in social engagement. Changes in the social environment influence social behaviors. Memories of social events, including remembering familiar individuals, require social engagement during encoding. Therefore, existing differences in adult and adolescent social repertoires and environmentally-driven changes in social behavior may impact novel partner preference, associated with social recognition. Several amygdala subregions are sensitive to the social environment and can influence social behavior, which is crucial for novelty preference. Amygdala neurons project to the septum and nucleus accumbens (NAc), which are linked to social engagement. Here, we investigated how the social environment impacts age-specific social behaviors during social encoding and its subsequent impact on partner preference. We then examined changes in amygdala-septal and -NAc circuits that accompany these changes. Brief isolation can drive social behavior in both adults and adolescents and was used to increase social engagement during encoding. We found that brief isolation facilitates social interaction in adolescents and adults, and analysis across time revealed that partner discrimination was intact in all groups, but there was a shift in preference within isolated and non-isolated groups. We found that this same isolation preferentially increases basal amygdala (BA) activity relative to other amygdala subregions in adults, but activity among amygdala subregions was similar in adolescents, even when considering conditions (no isolation, isolation). Further, we identify isolation-driven increases in BA-NAc and BA-septal circuits in both adults and adolescents. Together, these results provide evidence for changes in neuronal populations within amygdala subregions and their projections that are sensitive to the social environment that may influence the pattern of social interaction within briefly isolated groups during development.
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Affiliation(s)
- Nicole C. Ferrara
- Department of Foundational Sciences and Humanities, Discipline of Cellular and Molecular Pharmacology, Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
- Center for Neurobiology of Stress Resilience and Psychiatric Disorders, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
| | - Sydney Trask
- Department of Psychological Sciences, Purdue University, West Lafayette, IN, United States
| | - Alexandra Ritger
- Center for Neurobiology of Stress Resilience and Psychiatric Disorders, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
| | - Mallika Padival
- Department of Foundational Sciences and Humanities, Discipline of Cellular and Molecular Pharmacology, Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
- Center for Neurobiology of Stress Resilience and Psychiatric Disorders, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
| | - J. Amiel Rosenkranz
- Department of Foundational Sciences and Humanities, Discipline of Cellular and Molecular Pharmacology, Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
- Center for Neurobiology of Stress Resilience and Psychiatric Disorders, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
- *Correspondence: J. Amiel Rosenkranz,
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25
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Mallien AS, Becker L, Pfeiffer N, Terraneo F, Hahn M, Middelman A, Palme R, Creutzberg KC, Begni V, Riva MA, Leo D, Potschka H, Fumagalli F, Homberg JR, Gass P. Dopamine Transporter Knockout Rats Show Impaired Wellbeing in a Multimodal Severity Assessment Approach. Front Behav Neurosci 2022; 16:924603. [PMID: 35898652 PMCID: PMC9309546 DOI: 10.3389/fnbeh.2022.924603] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/10/2022] [Indexed: 11/20/2022] Open
Abstract
In preclinical psychiatry research, animals are central to modeling and understanding biological mechanisms of behavior and psychiatric disorders. We here present the first multimodal severity assessment of a genetically modified rat strain used in psychiatric research, lacking the dopamine transporter (DAT) gene and showing endophenotypes of several dopamine-associated disorders. Absence of the DAT leads to high extracellular dopamine (DA) levels and has been associated with locomotor hyperactivity, compulsive behaviors and stereotypies in the past. The German Animal Welfare Law, which is based on the EU Directive (2010/63/EU), requires a prospective severity assessment for every animal experiment, depending on the extent of the expected degree of pain, suffering, distress or lasting harm that the animals will experience. This should consider all procedures but also the impact of the genotype on the phenotype. Therefore, we examined multiple parameters indicating animal welfare, like burrowing behavior, social interaction, saccharin preference, baseline stress hormone levels and nesting behavior. Additionally, a footprint analysis was performed and home cage activity was analyzed for a more detailed characterization of locomotion. DAT KO rats demonstrated reduced burrowing, social interaction and saccharin preference. We also found pronounced stereotypies and alterations in the gait analysis in DAT KO rats. Moreover, we confirmed the hyperactivity and the impaired sensorimotor gating mechanisms to assure that our rats are exhibiting the correct phenotype. In conclusion, we provide evidence that DAT KO rats show alterations in natural behavior patterns and deduce that the marked stereotypies are a sign for coping difficulties, both indicating a negative influence of the genotype on wellbeing. We suggest to assess further rat models in an objectified severity assessment as previously done in mice to create a relative severity assessment based on scientific evidence. Until then, we propose the classification of homozygous DAT KO rats as “moderate” in accordance with the criteria of the EU directive 2010/63.
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Affiliation(s)
- Anne Stephanie Mallien
- Department of Psychiatry and Psychotherapy, RG Animal Models in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
- *Correspondence: Anne Stephanie Mallien,
| | - Laura Becker
- Department of Psychiatry and Psychotherapy, RG Animal Models in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Natascha Pfeiffer
- Department of Psychiatry and Psychotherapy, RG Animal Models in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Federica Terraneo
- Department of Psychiatry and Psychotherapy, RG Animal Models in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Melissa Hahn
- Department of Psychiatry and Psychotherapy, RG Animal Models in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Anthonieke Middelman
- Department of Cognitive Neuroscience, Centre for Neuroscience, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Rupert Palme
- Department of Biomedical Sciences, University of Veterinary Medicine, Vienna, Austria
| | - Kerstin Camile Creutzberg
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Veronica Begni
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Marco Andrea Riva
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Damiana Leo
- Department of Neurosciences, University of Mons, Mons, Belgium
| | - Heidrun Potschka
- Institute of Pharmacology, Toxicology, and Pharmacy, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Fabio Fumagalli
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Judith R. Homberg
- Department of Cognitive Neuroscience, Centre for Neuroscience, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Peter Gass
- Department of Psychiatry and Psychotherapy, RG Animal Models in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
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26
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Ham JR, Lilley MK, Lelekach J, Miller MR, Robeck TR, Pellis SM, Manitzas Hill HM. The emergence and early development of socio-sexual behavior in beluga calves (Delphinapterus leucas). Behav Processes 2022; 200:104695. [PMID: 35779700 DOI: 10.1016/j.beproc.2022.104695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 06/10/2022] [Accepted: 06/27/2022] [Indexed: 11/20/2022]
Abstract
While the ontogeny of beluga (Delphinapterus leucas) socio-sexual behavior has been documented in animals between 37- and 108-months-old, the first 36 months of life are yet to be examined. This study investigated how socio-sexual behaviors emerge over the first three years of life in a group of belugas in managed care. The emergence of socio-sexual behaviors was relatively consistent among immature animals. More complex behaviors, like s-posture presentations, developed in a piecemeal fashion (i.e., simple components of the behavior sequence emerged before complex components). The presence of an adult male significantly predicted if immature belugas would initiate and participate in socio-sexual behavior. However, partner preferences changed with age. In the first year of life, belugas engaged in sexual behavior with their mother most frequently but preferred to play with older males if given a choice. By the third year of life, belugas engaged in socio-sexual behavior most frequently with other immature animals. These findings enhance our understanding of how belugas develop sexually and socially and have implications for social housing practices of immature belugas.
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Affiliation(s)
- Jackson R Ham
- Department of Neuroscience, University of Lethbridge, Lethbridge, AB, Canada.
| | - Malin K Lilley
- Department of Life Sciences, Texas A & M - San Antonio, San Antonio, TX, USA
| | - Jessica Lelekach
- Department of Neuroscience, University of Lethbridge, Lethbridge, AB, Canada
| | | | | | - Sergio M Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, AB, Canada
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Potrebić M, Pavković Ž, Puškaš N, Pešić V. The Influence of Social Isolation on Social Orientation, Sociability, Social Novelty Preference, and Hippocampal Parvalbumin-Expressing Interneurons in Peripubertal Rats – Understanding the Importance of Meeting Social Needs in Adolescence. Front Behav Neurosci 2022; 16:872628. [PMID: 35592640 PMCID: PMC9113078 DOI: 10.3389/fnbeh.2022.872628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 03/28/2022] [Indexed: 11/13/2022] Open
Abstract
The fulfillment of belonging needs underlies a variety of behaviors. In order to understand how social needs unmet during maturation shape everyday life, we examined social motivation and cognition in peripubertal rats, as a rodent model of adolescence, subjected to social isolation (SI) during early and early-to-mid adolescence. The behavioral correlates of social orientation (social space preference), sociability (preference for social over non-social novelty), and social novelty preference (SNP) were examined in group-housed (GH) and single-housed (SH) rats in a 3-chamber test. The response to social odors was examined to gain insights into the developmental role of social odors in motivated social behavior. Differentiation between appetitive (number of visits/approaches) and consummatory (exploratory time) aspects of motivated social behavior was done to determine which facet of social motivation characterizes maturation when social needs are met and which aspect dominates when social needs are unsatisfied. The SI-sensitive parvalbumin-expressing interneurons (PVI) in the hippocampus were examined using immunohistochemistry. The main findings are the following: (1) in GH rats, the preference for social space is not evident regardless of animals’ age, while sociability becomes apparent in mid-adolescence strictly through consummatory behavior, along with complete SNP (appetitive, consummatory); (2) SH promotes staying in a social chamber/space regardless of animals’ age and produces an appetitive preference for it only in early-adolescent animals; (3) SH promotes sociability (appetitive, consummatory) regardless of the animals’ age and prevents the SNP; (4) the preference for a social odor is displayed in all the groups through consummatory behavior, while appetitive behavior is evident only in SH rats; (5) the response to social odors does not commensurate directly to the response to conspecifics; (6) SH does not influence PVI in the hippocampus, except in the case of early-adolescence when a transient decrease in the dentate gyrus is observed. These results accentuate the developmental complexity of social motivation and cognition, and the power of SI in adolescence to infringe social maturation at different functional levels, promoting appetitive behavior toward peers overall but harming the interest for social novelty. The findings emphasize the importance of the fulfillment of basic social needs in the navigation through the social world.
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Affiliation(s)
- Milica Potrebić
- Molecular Neurobiology and Behavior, Department of Neurobiology, Institute for Biological Research “Siniša Stanković”, National Institute of Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Željko Pavković
- Molecular Neurobiology and Behavior, Department of Neurobiology, Institute for Biological Research “Siniša Stanković”, National Institute of Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Nela Puškaš
- Institute of Histology and Embryology “Aleksandar Đ. Kostić”, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Vesna Pešić
- Molecular Neurobiology and Behavior, Department of Neurobiology, Institute for Biological Research “Siniša Stanković”, National Institute of Republic of Serbia, University of Belgrade, Belgrade, Serbia
- *Correspondence: Vesna Pešić,
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28
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Pellis SM, Pellis VC, Burke CJ, Stark RA, Ham JR, Euston DR, Achterberg EJM. Measuring Play Fighting in Rats: A Multilayered Approach. Curr Protoc 2022; 2:e337. [PMID: 35030300 DOI: 10.1002/cpz1.337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Rough-and-tumble play or play fighting is an important experience in the juvenile period of many species of mammals, as it facilitates the development of social skills, and for some species, play fighting is retained into adulthood as a tool for assessing and managing social relationships. Laboratory rats have been a model species for studying the neurobiology of play fighting and its key developmental and social functions. However, play fighting interactions are complex, involving competition and cooperation; therefore, no single measure to quantify this behavior is able to capture all its facets. Therefore, in this paper, we present a multilayered framework for scoring all the relevant facets of play that can be affected by experimental manipulations and the logic of how to match what is measured with the question being asked. © 2022 Wiley Periodicals LLC.
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Affiliation(s)
- S M Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, Canada
| | - V C Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, Canada
| | - C J Burke
- Department of Neuroscience, University of Lethbridge, Lethbridge, Canada
| | - R A Stark
- Department of Neuroscience, University of Lethbridge, Lethbridge, Canada
| | - J R Ham
- Department of Neuroscience, University of Lethbridge, Lethbridge, Canada
| | - D R Euston
- Department of Neuroscience, University of Lethbridge, Lethbridge, Canada
| | - E J M Achterberg
- Division Behavioural Neuroscience, Unit Population Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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29
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Chen DR, Lu HH. Social alienation of adolescents with obesity in classrooms: A multilevel approach. J Adolesc 2022; 94:81-91. [PMID: 35353406 DOI: 10.1002/jad.12001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 11/09/2022]
Abstract
INTRODUCTION Adolescents with obesity are more likely to be isolated by peers, but whether they also choose to disengage from their peers remains unclear. METHODS This study examined a sample of 646 adolescents between the age of 13 and 16 across 34 classrooms in 3 junior high schools in Taiwan, with data collected from May to June 2019. The sociometric network nomination method assessed peer relationships, such as unpopularity, unsociability, and alienation. Multilevel models were applied to explore the extent to which the class-level prevalence of overweight and obesity and peer support moderate the relationship between student-level obesity and peer relationships. RESULTS Overall, students with obesity were more likely to experience unpopularity, unsociability, and alienation from their peers in classroom settings (adjusted odds ratio [AOR] = 1.904, 2.208, 2.777, p < .05). Regardless of their obesity status, students in high classroom peer support were less likely to report unsociability (AOR = 0.124, p < .05). No cross-level interactions were observed, indicating that students with obesity did not experience a reduction of peer rejection in high peer support classrooms. Neither did obese students in classrooms with higher rates of overweight and obesity. CONCLUSIONS Students with obesity were more likely to experience interpersonal problems. Classroom peer support can increase peer acceptance for typical students but has no beneficial influence on adolescents with weight problems. Classroom peer support needs to be directed to become adequate support for students with obesity.
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Affiliation(s)
- Duan-Rung Chen
- Institute of Health Behaviors and Community Sciences, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Hsin-Hui Lu
- Department of Psychology, College of Medicine, Chung Shan Medical University, Taichung, Taiwan
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30
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Ahmed M, Boileau I, Le Foll B, Carvalho AF, Kloiber S. The endocannabinoid system in social anxiety disorder: from pathophysiology to novel therapeutics. ACTA ACUST UNITED AC 2021; 44:81-93. [PMID: 34468550 PMCID: PMC8827369 DOI: 10.1590/1516-4446-2021-1926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 06/15/2021] [Indexed: 11/22/2022]
Abstract
Social anxiety disorder (SAD) is a highly prevalent psychiatric disorder that presents with an early age of onset, chronic disease course, and increased risk of psychiatric comorbidity. Current treatment options for SAD are associated with low response rates, suboptimal efficacy, and possible risk of adverse effects. Investigation of new neurobiological mechanisms may aid in the identification of more specific therapeutic targets for the treatment of this disorder. Emerging evidence suggests that the endogenous cannabinoid system, also referred to as the endocannabinoid system (ECS), could play a potential role in the pathophysiology of SAD. This review discusses the known pathophysiological mechanisms of SAD, the potential role of the ECS in this disorder, current drugs targeting the ECS, and the potential of these novel compounds to enhance the therapeutic armamentarium for SAD. Further investigational efforts, specifically in human populations, are warranted to improve our knowledge of the ECS in SAD.
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Affiliation(s)
- Mashal Ahmed
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada.,Brain Health Imaging Centre, Centre for Addiction and Mental Health (CAMH), Toronto, ON, Canada
| | - Isabelle Boileau
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada.,Brain Health Imaging Centre, Centre for Addiction and Mental Health (CAMH), Toronto, ON, Canada.,Campbell Family Mental Health Research Institute, CAMH, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - Bernard Le Foll
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada.,Campbell Family Mental Health Research Institute, CAMH, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada.,Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
| | - Andre F Carvalho
- Campbell Family Mental Health Research Institute, CAMH, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada.,Innovation in Mental and Physical Health and Clinical Treatment (IMPACT) Strategic Research Centre, Deakin University, Geelong, VIC, Australia, 3216
| | - Stefan Kloiber
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada.,Campbell Family Mental Health Research Institute, CAMH, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada
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31
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Sánchez-Sandoval Y, Verdugo L. School Adjustment and Socio-Family Risk as Predictors of Adolescents' Peer Preference. Front Psychol 2021; 12:645712. [PMID: 34366965 PMCID: PMC8336578 DOI: 10.3389/fpsyg.2021.645712] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 05/11/2021] [Indexed: 11/30/2022] Open
Abstract
This work analyzes peer preferences at the beginning of adolescence. For this purpose, each adolescent’s sociometric status was studied in their classroom group, and attempts were made to identify indicators of academic, personal, and socio-family adjustment related to that status. Participants were 831 adolescents studying 1st grade of Compulsory Secondary Education (CSE), in 31 classrooms from 10 schools. The 31 tutors of these students also participated. Sample selection was intentional. A quantitative research approach was used. Sociometric data were collected using the nomination method. Teachers provided information about these youths’ adjustment and family risk variables. Descriptive analyses and bivariate correlations were calculated as a preliminary analysis of the study. Chi-square tests or ANOVAs examined the similarities and differences between status based on personal, socio-family, and school adjustment variables. Lastly, linear regression analysis and a Structural Equation Model (SEM) were performed. These latter analyses revealed that good performance and academic adjustment are important predictors of successful social relations. Also, the data show that the presence of personal and socio-family risk variables makes it difficult for adolescents to be accepted by their peers. The results suggest the need for school and family support to promote peer acceptance. Working on both aspects can help improve classroom coexistence. Intervention techniques are recommended for the entire group to intervene on attitudes, interpretations, and behaviors that enrich individual tools and the collective climate.
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Affiliation(s)
- Yolanda Sánchez-Sandoval
- Departamento de Psicología, Instituto de Investigación e Innovación Biomédica de Cádiz, Universidad de Cádiz, Cádiz, Spain
| | - Laura Verdugo
- Departamento de Psicología, Instituto de Investigación e Innovación Biomédica de Cádiz, Universidad de Cádiz, Cádiz, Spain
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32
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Kogo H, Maeda N, Kiyokawa Y, Takeuchi Y. Rats do not consider all unfamiliar strains to be equivalent. Behav Processes 2021; 190:104457. [PMID: 34216685 DOI: 10.1016/j.beproc.2021.104457] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 06/20/2021] [Accepted: 06/28/2021] [Indexed: 11/28/2022]
Abstract
Humans show distinct social behaviours when we recognise social similarity in opponents that are members of the same social group. However, little attention has been paid to the role of social similarity in non-human animals. In the Wistar subject rats, the presence of an unfamiliar Wistar rat mitigated stress responses, suggesting the importance of social similarity in this stress-buffering phenomenon. We subsequently found that the presence of unfamiliar Sprague-Dawley (SD) or Long-Evans (LE) rats, but not an unfamiliar Fischer 344 (F344) rat, similarly mitigated stress responses in the subject rats. It is therefore possible that the subject rats recognised social similarity to unfamiliar SD and LE rats. In this study, we demonstrated that the Wistar subject rats were capable of categorizing unfamiliar rats based on their strain, and that the Wistar subjects showed a preference for unfamiliar Wistar, SD, and LE rats over F344 rats. However, the subject rats did not show a preference among Wistar, SD, and LE rats. In addition, the results were not due to an aversion to F344 rats, and preference was not affected when anaesthetised rats were presented to the subject rats. The findings suggested that rats recognise social similarity to certain unfamiliar strains of rats.
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Affiliation(s)
- Hiroki Kogo
- Laboratory of Veterinary Ethology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
| | - Naori Maeda
- Laboratory of Veterinary Ethology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
| | - Yasushi Kiyokawa
- Laboratory of Veterinary Ethology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan.
| | - Yukari Takeuchi
- Laboratory of Veterinary Ethology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
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33
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Individual differences in social play behaviour predict alcohol intake and control over alcohol seeking in rats. Psychopharmacology (Berl) 2021; 238:3119-3130. [PMID: 34338827 PMCID: PMC8605978 DOI: 10.1007/s00213-021-05929-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 07/08/2021] [Indexed: 12/29/2022]
Abstract
RATIONALE Social play behaviour is a rewarding social activity displayed by young mammals, thought to be important for the development of brain and behaviour. Indeed, disruptions of social play behaviour in rodents have been associated with cognitive deficits and augmented sensitivity to self-administration of substances of abuse, including alcohol, later in life. However, the relation between social development and loss of control over substance use, a key characteristic of substance use disorders including alcohol use disorder (AUD), has not been investigated. Moreover, it remains unknown how inherent differences in playfulness relate to differences in the sensitivity to substance use and AUD. OBJECTIVE The objective of this study is to determine how individual differences in juvenile social play behaviour predict alcohol intake and loss of control over alcohol seeking. METHODS Juvenile male Lister hooded rats were characterized for their tendency to engage in social play behaviour. Subsequently, alcohol consumption and conditioned suppression of alcohol seeking were assessed in the tertiles of rats that showed the most and least social play. RESULTS The rats that engaged most in social play behaviour consumed more alcohol than their less playful counterparts. However, whereas the most playful rats showed intact conditioned suppression of alcohol seeking, the least playful rats showed no such suppression. CONCLUSION Individual levels of playfulness predict the sensitivity to alcohol-directed behaviour. Highly playful rats are more prone to alcohol intake, yet show greater control over alcohol seeking. These findings increase our understanding of the relationship between social development and vulnerability to AUD.
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34
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Morrison KE. Animal models built for women's brain health: Progress and potential. Front Neuroendocrinol 2020; 59:100872. [PMID: 32961121 PMCID: PMC7669558 DOI: 10.1016/j.yfrne.2020.100872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/29/2020] [Accepted: 09/15/2020] [Indexed: 12/21/2022]
Abstract
Women and men have different levels of risk for a variety of brain disorders. Despite this well-known epidemiological finding, preclinical work utilizing animal models has historically only included male animals. The policies of funders to require consideration of sex as a biological variable has shifted the momentum to include female animals in preclinical neuroscience and to report findings by sex. However, there are many biological questions related to brain health that go beyond sex differences and are indeed specific to women. Here, the focus is on why animal models should be utilized in the pursuit of understanding women's brain health, a brief overview of what they have provided thus far, and why they still hold tremendous promise. This review concludes with a set of suggestions for how to begin to pursue translational animal models in a way that facilitates rapid success and harnesses the most powerful aspects of animal models.
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O'Sullivan G, Humphrey RM, Thornton AM, Kerr DM, McGuire BE, Caes L, Roche M. Maternal presence or absence alters nociceptive responding and cortical anandamide levels in juvenile female rats. Behav Brain Res 2020; 392:112712. [PMID: 32479851 DOI: 10.1016/j.bbr.2020.112712] [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: 02/28/2020] [Revised: 04/21/2020] [Accepted: 05/16/2020] [Indexed: 10/24/2022]
Abstract
The influence of parental support on child pain experiences is well recognised. Accordingly, animal studies have revealed both short- and long-term effects of early life stress on nociceptive responding and neural substrates such as endocannabinoids. The endocannabinoid system plays an important role in mediating and modulating stress, social interaction, and nociception. This study examined the effects of maternal support or acute isolation on nociceptive responding of female rats to a range of stimuli during the juvenile pre-adolescent period and accompanying changes in the endocannabinoid system. The data revealed that juvenile female Sprague Dawley rats (PND21-24) isolated from the dam for 1 h prior to nociceptive testing exhibited increased latency to withdraw in the hot plate test and increased mechanical withdrawal threshold in the Von Frey test, compared to rats tested in the presence of the dam. Furthermore, isolated rats exhibited reduced latency to respond in the acetone drop test and enhanced nociceptive responding in the formalin test when compared to dam-paired counterparts. Anandamide, but not 2-AG, levels were reduced in the prefrontal cortex of dam-paired, but not isolated, juvenile rats following nociceptive testing. There was no change in the expression of CB1, FAAH or MAGL; however, CB2 receptor expression was reduced in both dam-paired and isolated rats following nociceptive testing. Taken together the data demonstrate that brief social isolation or the presence of the dam modulates nociceptive responding of juvenile rat pups in a modality specific manner, and suggest a possible role for the endocannabinoid system in the prefrontal cortex in sociobehavioural pain responses during early life.
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Affiliation(s)
- Grace O'Sullivan
- Centre for Pain Research, National University of Ireland Galway, Ireland; School of Psychology, National University of Ireland Galway, Ireland
| | - Rachel M Humphrey
- Physiology, School of Medicine, National University of Ireland Galway, Ireland; Centre for Pain Research, National University of Ireland Galway, Ireland; Galway Neuroscience Centre, National University of Ireland Galway, Ireland
| | - Aoife M Thornton
- Physiology, School of Medicine, National University of Ireland Galway, Ireland; Galway Neuroscience Centre, National University of Ireland Galway, Ireland
| | - Daniel M Kerr
- Galway Neuroscience Centre, National University of Ireland Galway, Ireland; Pharmacology, School of Medicine, National University of Ireland Galway, Ireland
| | - Brian E McGuire
- Centre for Pain Research, National University of Ireland Galway, Ireland; School of Psychology, National University of Ireland Galway, Ireland
| | - Line Caes
- Psychology, Faculty of Natural Sciences, University of Stirling, Scotland, UK
| | - Michelle Roche
- Physiology, School of Medicine, National University of Ireland Galway, Ireland; Centre for Pain Research, National University of Ireland Galway, Ireland; Galway Neuroscience Centre, National University of Ireland Galway, Ireland.
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Dhaliwal K, Danzig A, Fineberg SK. Improving Research Practice for Studying Borderline Personality Disorder: Lessons From the Clinic. ACTA ACUST UNITED AC 2020; 4:2470547020912504. [PMID: 32518886 PMCID: PMC7254581 DOI: 10.1177/2470547020912504] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 02/23/2020] [Indexed: 12/25/2022]
Abstract
Borderline personality disorder is an often misunderstood and underdiagnosed mental illness characterized in part by affective lability. Clinicians’ unique understanding of the disorder has allowed them to develop disorder-specific approaches to treatment. In this review, we highlight how borderline personality disorder research can benefit from greater engagement with key disorder-specific features, including symptom variability and interpersonal sensitivity. In addition, we propose that research which employs interactive tasks will be more reflective of the kinds of volatility found in the real-life situations. Finally, we discuss how mixed-methodology can serve as a way for recovery-oriented research to practice the very ideals and recommendations it suggests. We use a patient case to contextualize each section. As interest in borderline personality disorder continues to grow, an intentional emphasis on a person-centered, recovery-focused, and disorder-specific approach to research is needed.
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Affiliation(s)
- Khushwant Dhaliwal
- Department of Psychiatry, Yale School of Medicine, Yale University, New Haven, CT, USA
| | - Ayala Danzig
- Department of Psychiatry, Yale School of Medicine, Yale University, New Haven, CT, USA
| | - Sarah K Fineberg
- Department of Psychiatry, Yale School of Medicine, Yale University, New Haven, CT, USA
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Abstract
The Norway rat has important impacts on our life. They are amongst the most used research subjects, resulting in ground-breaking advances. At the same time, wild rats live in close association with us, leading to various adverse interactions. In face of this relevance, it is surprising how little is known about their natural behaviour. While recent laboratory studies revealed their complex social skills, little is known about their social behaviour in the wild. An integration of these different scientific approaches is crucial to understand their social life, which will enable us to design more valid research paradigms, develop more effective management strategies, and to provide better welfare standards. Hence, I first summarise the literature on their natural social behaviour. Second, I provide an overview of recent developments concerning their social cognition. Third, I illustrate why an integration of these areas would be beneficial to optimise our interactions with them.
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Affiliation(s)
- Manon K Schweinfurth
- School of Psychology and Neuroscience, University of St AndrewsSt AndrewsUnited Kingdom
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38
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Prevention of schizophrenia deficits via non-invasive adolescent frontal cortex stimulation in rats. Mol Psychiatry 2020; 25:896-905. [PMID: 30692610 DOI: 10.1038/s41380-019-0356-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 11/28/2018] [Accepted: 12/20/2018] [Indexed: 12/17/2022]
Abstract
Schizophrenia is a severe neurodevelopmental psychiatric affliction manifested behaviorally at late adolescence/early adulthood. Current treatments comprise antipsychotics which act solely symptomatic, are limited in their effectiveness and often associated with side-effects. We here report that application of non-invasive transcranial direct current stimulation (tDCS) during adolescence, prior to schizophrenia-relevant behavioral manifestation, prevents the development of positive symptoms and related neurobiological alterations in the maternal immune stimulation (MIS) model of schizophrenia.
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Siviy SM. How strain differences could help decipher the neurobiology of mammalian playfulness: What the less playful Fischer 344 rat can tell us about play. INTERNATIONAL JOURNAL OF PLAY 2020; 9:9-24. [PMID: 33717643 PMCID: PMC7954129 DOI: 10.1080/21594937.2020.1721024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 12/10/2019] [Indexed: 06/12/2023]
Abstract
Play is common among the young of many mammalian species. How that play is exhibited results from a dynamic interplay between genetic framework and experiential influences that, in turn, operate on hard-wired brain systems. One approach towards understanding how genes and environment interact with brain substrates to yield a particular playful phenotype is to take advantage of inbred strains of rats that come with a known genetic identity and assess the effects of varying early social experiences and targeted neurobiological interventions on rats of these strains. This paper primarily summarizes research utilizing the F344 inbred strain, a rat that consistently plays less than most other strains.
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Affiliation(s)
- Stephen M Siviy
- Dept. of Psychology, Gettysburg College, Gettysburg, PA 17325, USA
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40
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Wilkin MM, Menard JL. Social housing ameliorates the enduring effects of intermittent physical stress during mid-adolescence. Physiol Behav 2020; 214:112750. [DOI: 10.1016/j.physbeh.2019.112750] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 11/02/2019] [Accepted: 11/22/2019] [Indexed: 12/01/2022]
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Alugubelly N, Mohammad AN, Edelmann MJ, Nanduri B, Sayed M, Park JW, Carr RL. Proteomic and transcriptional profiling of rat amygdala following social play. Behav Brain Res 2019; 376:112210. [PMID: 31493430 DOI: 10.1016/j.bbr.2019.112210] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 09/03/2019] [Accepted: 09/03/2019] [Indexed: 12/31/2022]
Abstract
Social play is the most characteristic form of social interaction which is necessary for adolescents to develop proper cognitive, emotional, and social competency. The information available on neural substrates and the mechanism involved in social play is limited. This study characterized social play by proteomic and transcriptional profiling studies. Social play was performed on male Sprague Dawley rats on postnatal day 38 and protein and gene expression in the amygdala was determined following behavioral testing. The proteomic analysis led to the identification of 170 differentially expressed proteins (p ≤ 0.05) with 67 upregulated and 103 downregulated proteins. The transcriptomic analysis led to the identification of 188 genes (FDR ≤ 0.05) with 55 upregulated and 133 downregulated genes. DAVID analysis of gene/protein expression data revealed that social play altered GABAergic signaling, glutamatergic signaling, and G-protein coupled receptor (GPCR) signaling. These data suggest that the synaptic levels of GABA and glutamate increased during play. Ingenuity Pathway Analysis (IPA) confirmed these alterations. IPA also revealed that differentially expressed genes/proteins in our data had significant over representation of neurotransmitter signaling systems, including the opioid, serotonin, and dopamine systems, suggesting that play alters the systems involved in the regulation of reward. In addition, corticotropin-releasing hormone signaling was altered indicating that an increased level of stress occurs during play. Overall, our data suggest that increased inhibitory GPCR signaling in these neurotransmitter pathways occurs following social play as a physiological response to regulate the induced level of reward and stress and to maintain the excitatory-inhibitory balance in the neurotransmitter systems.
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Affiliation(s)
- Navatha Alugubelly
- Center for Environmental Health Sciences, MS, USA; Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, MS, USA
| | - Afzaal N Mohammad
- Center for Environmental Health Sciences, MS, USA; Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, MS, USA
| | - Mariola J Edelmann
- Department of Microbiology and Cell Science, University of Florida, Gainesville, FL, USA
| | - Bindu Nanduri
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, MS, USA
| | - Mohammed Sayed
- Department of Computer Engineering and Computer Science, KY, USA
| | - Juw Won Park
- Department of Computer Engineering and Computer Science, KY, USA; KBRIN Bioinformatics Core, University of Louisville, KY, USA.
| | - Russell L Carr
- Center for Environmental Health Sciences, MS, USA; Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, MS, USA.
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Emmerson MG, Spencer KA, Brown GR. Social experience during adolescence in female rats increases 50 kHz ultrasonic vocalizations in adulthood, without affecting anxiety-like behavior. Dev Psychobiol 2019; 62:212-223. [PMID: 31429082 DOI: 10.1002/dev.21906] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 07/01/2019] [Accepted: 07/16/2019] [Indexed: 01/28/2023]
Abstract
Adolescents are highly motivated to engage in social interactions, and researchers have hypothesized that positive social relationships during adolescence can have long term, beneficial effects on stress reactivity and mental well-being. Studies of laboratory rodents provide the opportunity to investigate the relationship between early social experiences and later behavioral and physiological responses to stressors. In this study, female Lister-hooded rats (N = 12 per group) were either (a) provided with short, daily encounters (10 min/day) with a novel partner during mid-adolescence (postnatal day 34-45; "social experience," SE, subjects) or (b) underwent the same protocol with a familiar cagemate during mid-adolescence ("control experience," CE, subjects), or (c) were left undisturbed in the home cage (non-handled "control," C, subjects). When tested in adulthood, the groups did not differ in behavioral responses to novel environments (elevated plus maze, open field, and light-dark box) or in behavioral and physiological (urinary corticosterone) responses to novel social partners. However, SE females emitted significantly more 50 kHz ultrasonic vocalizations than control subjects both before and after social separation from a familiar social partner, which is consistent with previous findings in male rats. Thus, enhanced adolescent social experience appears to have long-term effects on vocal communication and could potentially modulate adult social relationships.
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Affiliation(s)
| | - Karen A Spencer
- School of Psychology & Neuroscience, University of St Andrews, St Andrews, UK
| | - Gillian R Brown
- School of Psychology & Neuroscience, University of St Andrews, St Andrews, UK
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Abstract
Abstract
Play is an important and understudied class of phenomena that likely serves a critical role in the ontogeny and maintenance of fitness-enhancing behaviors. Many species exhibit little or no play. Among those animals that do play, some exhibit only very simple forms, while others engage in complex play both solitarily and socially. Likewise, some animals play only as juveniles, while others continue to play as adults. We propose a general framework to explain interspecies variation in the evolution and emergence of simple vs. complex forms of play, supported by both a review of the empirical evidence and a novel mathematical model. The emergence of play requires that initial investment returns benefits that sufficiently compensate the opportunity costs associated with simple play. The subsequent evolution of complex play depends upon the interplay of several life-history factors related to the benefits, costs, and time course of play investment. We conclude with implications for understanding the evolution of play across the animal kingdom.
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Affiliation(s)
- Paul E Smaldino
- Department of Cognitive and Information Sciences, University of California, Merced, CA, USA
| | - Elisabetta Palagi
- Department of Biology, University of Pisa. Lungarno Antonio Pacinotti, Pisa PI, Italy
| | - Gordon M Burghardt
- Departments of Psychology and Ecology & Evolutionary Biology, University of Tennessee, Knoxville, TN, USA
| | - Sergio M Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, AB, Canada
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Is play a behavior system, and, if so, what kind? Behav Processes 2019; 160:1-9. [DOI: 10.1016/j.beproc.2018.12.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 12/10/2018] [Accepted: 12/13/2018] [Indexed: 12/29/2022]
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Nijhof SL, Vinkers CH, van Geelen SM, Duijff SN, Achterberg EM, van der Net J, Veltkamp RC, Grootenhuis MA, van de Putte EM, Hillegers MH, van der Brug AW, Wierenga CJ, Benders MJ, Engels RC, van der Ent CK, Vanderschuren LJ, Lesscher HM. Healthy play, better coping: The importance of play for the development of children in health and disease. Neurosci Biobehav Rev 2018; 95:421-429. [DOI: 10.1016/j.neubiorev.2018.09.024] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 08/27/2018] [Accepted: 09/26/2018] [Indexed: 12/20/2022]
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46
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Schank JC, Burghardt GM, Pellis SM. Toward a Theory of the Evolution of Fair Play. Front Psychol 2018; 9:1167. [PMID: 30087629 PMCID: PMC6066575 DOI: 10.3389/fpsyg.2018.01167] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 06/18/2018] [Indexed: 11/15/2022] Open
Abstract
Juvenile animals of many species engage in social play, but its functional significance is not well understood. This is especially true for a type of social play called fair play (Fp). Social play often involves behavioral patterns similar to adult behaviors (e.g., fighting, mating, and predatory activities), but young animals often engage in Fp behaviors such as role-reversals and self-handicapping, which raises the evolutionary problem of why Fp exists. A long-held working hypothesis, tracing back to the 19th century, is that social play provides contexts in which adult social skills needed for adulthood can be learned or, at least, refined. On this hypothesis, Fp may have evolved for adults to acquire skills for behaving fairly in the sense of equitable distribution of resources or treatment of others. We investigated the evolution of Fp using an evolutionary agent-based model of populations of social agents that learn adult fair behavior (Fb) by engaging in Fp as juveniles. In our model, adults produce offspring by accumulating resources over time through foraging. Adults can either behave selfishly by keeping the resources they forage or they can pool them, subsequently dividing the pooled resources after each round of foraging. We found that fairness as equitability was beneficial especially when resources were large but difficult to obtain and led to the evolution of Fp. We conclude by discussing the implications of this model, for developing more rigorous theory on the evolution of social play, and future directions for theory development by modeling the evolution of play.
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Affiliation(s)
- Jeffrey C Schank
- Department of Psychology, University of California, Davis, Davis, CA, United States
| | - Gordon M Burghardt
- Departments of Psychology and Ecology & Evolutionary Biology, University of Tennessee, Knoxville, Knoxville, TN, United States
| | - Sergio M Pellis
- Department of Neuroscience, University of Lethbridge, Lethbridge, AB, Canada
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Modlinska K, Stryjek R, Chrzanowska A, Pisula W. Social environment as a factor affecting exploration and learning in pre-juvenile rats. Behav Processes 2018; 153:77-83. [PMID: 29777747 DOI: 10.1016/j.beproc.2018.05.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 05/12/2018] [Accepted: 05/15/2018] [Indexed: 10/16/2022]
Abstract
Stress associated with social isolation in early life can lead to disturbances in the emotional regulation in adult rats. However, there are no reports on the impact of isolation from the mother while providing contact with peers. Under such conditions, young individuals have the opportunity to interact with others, are able to develop social behaviour, etc. Yet, there is no stimulation and care provided by the mother. We examined the relative impact of maternal contact and sibling contact in the rarely studied pre-juvenile (3rd and 4th week post birth) period on subsequent development. An experiment was designed to compare the impact of different social environments on the animals' behaviour in adulthood. There were three breeding conditions: young with mother, young with peers, and standard breeding conditions. Adult rats were subjected to a T-Maze test to measure the level of exploratory behaviour. Spatial learning was assessed by placing water bottles in the side corridors. The analysis revealed that a distorted environment during the development process has a negative impact on the rats' emotional regulation and a subtle effect on related aspects of adaptive behaviours (i.e. exploration). In the pre-juvenile period, to some degree, contact with peers may be complementary to the mother's influence.
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Affiliation(s)
- Klaudia Modlinska
- Institute of Psychology, Polish Academy of Sciences, 1 Jaracza St., Warsaw, Poland.
| | - Rafał Stryjek
- Institute of Psychology, Polish Academy of Sciences, 1 Jaracza St., Warsaw, Poland
| | - Anna Chrzanowska
- Institute of Psychology, Polish Academy of Sciences, 1 Jaracza St., Warsaw, Poland
| | - Wojciech Pisula
- Institute of Psychology, Polish Academy of Sciences, 1 Jaracza St., Warsaw, Poland
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48
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Abstract
Play is an important part of normal childhood development and seen in many mammals, including rats. To better understand the interplay between genotype and postnatal experiences, the effects of neonatal handling on play were assessed in Lewis (LEW) and Fischer 344 (F344) rats. Handled litters experienced brief periods of separation during the first two postnatal weeks. F344 rats were less likely to direct nape contacts toward an untreated Sprague-Dawley (SD) partner and less likely to rotate to a supine position in response to a nape contact. When compared to rats from control litters, handled LEW, and F344 rats were more likely to respond to nape contacts with complete rotations, suggesting that handling increased playful responsiveness to a comparable extent in both strains. SD rats paired with handled inbred rats had more nape contacts than those paired with non-handled rats. While handled LEW rats also tended to direct more nape contacts to the SD partner than non-handled LEW rats there was no difference between handled and non-handled F344 rats. These results could not be readily explained by handling-induced changes in either maternal care or anxiety. These data suggest that the behavioral consequences of neonatal handling may not depend to a great extent on the genetic platform that these manipulations are acting on. These data also suggest that the ability to maintain the ebb and flow between playful solicitation and playful responsiveness may be compromised in F344 rats and may contribute to the lower levels of play in this strain.
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Affiliation(s)
- Stephen M Siviy
- Department of Psychology, Gettysburg College, Gettysburg, Pennsylvania
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49
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Affiliation(s)
- Camilla Cenni
- Centre for Research in Animal Behaviour (CRAB); University of Exeter; Exeter UK
- Department of Psychology; University of Lethbridge; Lethbridge AB Canada
| | - Tim W. Fawcett
- Centre for Research in Animal Behaviour (CRAB); University of Exeter; Exeter UK
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50
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Herzog JI, Schmahl C. Adverse Childhood Experiences and the Consequences on Neurobiological, Psychosocial, and Somatic Conditions Across the Lifespan. Front Psychiatry 2018; 9:420. [PMID: 30233435 PMCID: PMC6131660 DOI: 10.3389/fpsyt.2018.00420] [Citation(s) in RCA: 257] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 08/15/2018] [Indexed: 01/08/2023] Open
Abstract
Introduction: Adverse childhood experiences (ACE) such as sexual and physical abuse or neglect are frequent in childhood and constitute a massive stressor with long-lasting adverse effects on the brain, mental and physical health.The aim of this qualitative review is to present a concise overview of the present literature on the impact of ACE on neurobiology, mental and somatic health in later adulthood. Methods: The authors reviewed the existing literature on the impact of ACE on neurobiology, mental and somatic health in later adulthood and summarized the results for a concise qualitative overview. Results: In adulthood, the history of ACE can result in complex clinical profiles with several co-occurring mental and somatic disorders such as posttraumatic stress disorder, depression, borderline personality disorder, obesity and diabetes. Although a general stress effect in the development of the disorders and neural alterations can be assumed, the role of type and timing of ACE is of particular interest in terms of prevention and treatment of ACE-related mental and somatic conditions. It has been suggested that during certain vulnerable developmental phases the risk for subsequent ACE-related disorders is increased. Moreover, emerging evidence points to sensitive periods and specificity of ACE-subtypes in the development of neurobiological alterations, e.g., volumetric and functional changes in the amygdala and hippocampus. Conclusion: Longitudinal studies are needed to investigate complex ACE-related characteristics and mechanisms relevant for mental and somatic disorders by integrating state of the art knowledge and methods. By identifying and validating psychosocial and somatic risk factors and diagnostic markers one might improve the development of innovative somatic and psychological treatment options for individuals suffering from ACE-related disorders.
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Affiliation(s)
- Julia I Herzog
- Department of Psychosomatic Medicine and Psychotherapy, Central Institute of Mental Health Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Christian Schmahl
- Department of Psychosomatic Medicine and Psychotherapy, Central Institute of Mental Health Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.,Department of Psychiatry, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
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