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Ma ST, Zhao W, Liu B, Jia RY, Zhao CJ, Cui LQ. Association between β1 adrenergic receptor gene Arg389Gly polymorphism and risk of heart failure: a meta-analysis. Genet Mol Res 2015; 14:5922-9. [PMID: 26125791 DOI: 10.4238/2015.june.1.9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Numerous studies have evaluated the association between Arg389Gly polymorphism in the β1 adrenergic receptor gene and heart failure risk. However, the specific association is still controversial. We performed a meta-analysis of all case-control studies that evaluated the association between Arg389Gly polymorphism and heart failure in humans. Studies were identified in the PubMed, Embase, and China National Knowledge Infrastructure databases. Two reviewers independently assessed the studies. Six case-control studies with a total of 1736 participants were included in the meta-analysis, including 882 cases with heart failure and 854 controls, and our results showed no association between the Arg389Gly polymorphism and heart failure [ArgArg vs GlyGly: odds ratio (OR) = 0.84, 95% confidence interval (CI) 0.59-1.20; ArgArg vs ArgGly: OR = 0.95, 95%CI 0.78-1.16; dominant model: OR = 1.08, 95%CI 0.89-1.31; recessive model: OR = 0.96, 95%CI 0.69-1.35]. No publication bias was found in the present study (all P values > 0.05). In conclusion, the β1 adrenergic receptor gene Arg389Gly polymorphism might not be associated with heart failure risk. Further large and well-designed studies are needed to confirm this conclusion.
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Affiliation(s)
- S T Ma
- Department of Cardiology, The Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China
| | - W Zhao
- Department of Cardiology, Shandong Jiaotong Hospital, Shandong, China
| | - B Liu
- Department of Cardiology, Jinan Institute of Cardiovascular Disease, The Fourth People's Hospital of Jinan, Jinan, Shandong, China
| | - R Y Jia
- Department of Cardiology, Jinan Institute of Cardiovascular Disease, The Fourth People's Hospital of Jinan, Jinan, Shandong, China
| | - C J Zhao
- Department of Cardiology, Jinan Institute of Cardiovascular Disease, The Fourth People's Hospital of Jinan, Jinan, Shandong, China
| | - L Q Cui
- Department of Cardiology, The Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China
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Liberzon I, Ma ST, Okada G, Ho SS, Swain JE, Evans GW. Childhood poverty and recruitment of adult emotion regulatory neurocircuitry. Soc Cogn Affect Neurosci 2015; 10:1596-606. [PMID: 25939653 DOI: 10.1093/scan/nsv045] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Accepted: 04/24/2015] [Indexed: 01/18/2023] Open
Abstract
One in five American children grows up in poverty. Childhood poverty has far-reaching adverse impacts on cognitive, social and emotional development. Altered development of neurocircuits, subserving emotion regulation, is one possible pathway for childhood poverty's ill effects. Children exposed to poverty were followed into young adulthood and then studied using functional brain imaging with an implicit emotion regulation task focused. Implicit emotion regulation involved attention shifting and appraisal components. Early poverty reduced left dorsolateral prefrontal cortex recruitment in the context of emotional regulation. Furthermore, this emotion regulation associated brain activation mediated the effects of poverty on adult task performance. Moreover, childhood poverty also predicted enhanced insula and reduced hippocampal activation, following exposure to acute stress. These results demonstrate that childhood poverty can alter adult emotion regulation neurocircuitry, revealing specific brain mechanisms that may underlie long-term effects of social inequalities on health. The role of poverty-related emotion regulatory neurocircuitry appears to be particularly salient during stressful conditions.
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Affiliation(s)
- Israel Liberzon
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA, Ann Arbor Veterans Administration Medical Center, Ann Arbor, MI, USA,
| | - Sean T Ma
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA
| | - Go Okada
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA, Department of Psychiatry, Hiroshima University, Hiroshima, Japan
| | - S Shaun Ho
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA
| | - James E Swain
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA, Center for Human Growth and Development, University of Michigan, Ann Arbor, MI, USA, Child Study Center, Yale University, New Haven, CT, USA and
| | - Gary W Evans
- Department of Design and Environmental Analysis, and Departmentof Human Development, Bronfenbrenner Center for Translational Research, Cornell University, Ithaca, NY, USA
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Ma ST, Resendez SL, Aragona BJ. Sex differences in the influence of social context, salient social stimulation and amphetamine on ultrasonic vocalizations in prairie voles. Integr Zool 2015; 9:280-93. [PMID: 24952968 DOI: 10.1111/1749-4877.12071] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Prairie voles (Microtus ochrogaster) are a socially monogamous rodent species and their cooperative behaviors require extensive communication between conspecifics. Rodents use ultrasonic vocalizations (USVs) to communicate and because a prairie vole breeder pair must engage in extensive cooperation for successful reproduction, auditory communication may be critical for this species. Therefore, we sought to characterize USVs in adult male and female prairie voles, and to determine how these calls are influenced by social context, salient social stimuli and the psychostimulant drug of abuse amphetamine (AMPH). Here, we characterize prairie vole USVs by showing the range of frequencies of prairie vole USVs, the proportion of various call types, how these call types compare between males and females, and how they are influenced by social stimulation and AMPH. AMPH caused a robust increase in the number of USVs in both males and females and there was a dramatic sex difference in the complexity of call structures of AMPH-induced USVs, with males emitting more elaborate calls. Moreover, we show that novel (i.e. salient) social cues evoked differential increases in USVs across sex, with males showing a much more robust increase in USV production, both with respect to the frequency and complexity of USV production. Exposure to an estrous female in particular caused an extraordinary increase in USVs in male subjects. These data suggest that USVs may be a useful measure of social motivation in this species, including how social behaviors can be impacted by drugs of abuse.
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Affiliation(s)
- Sean T Ma
- Department of Psychology, University of Michigan, Ann Arbor, MI, USA
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Liberzon I, King AP, Ressler KJ, Almli LM, Zhang P, Ma ST, Cohen GH, Tamburrino MB, Calabrese JR, Galea S. Interaction of the ADRB2 gene polymorphism with childhood trauma in predicting adult symptoms of posttraumatic stress disorder. JAMA Psychiatry 2014; 71:1174-82. [PMID: 25162199 PMCID: PMC4597911 DOI: 10.1001/jamapsychiatry.2014.999] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
IMPORTANCE Posttraumatic stress disorder (PTSD), while highly prevalent (7.6% over a lifetime), develops only in a subset of trauma-exposed individuals. Genetic risk factors in interaction with trauma exposure have been implicated in PTSD vulnerability. OBJECTIVE To examine the association of 3755 candidate gene single-nucleotide polymorphisms with PTSD development in interaction with a history of childhood trauma. DESIGN, SETTING, AND PARTICIPANTS Genetic association study in an Ohio National Guard longitudinal cohort (n = 810) of predominantly male soldiers of European ancestry, with replication in an independent Grady Trauma Project (Atlanta, Georgia) cohort (n = 2083) of predominantly female African American civilians. MAIN OUTCOMES AND MEASURES Continuous measures of PTSD severity, with a modified (interview) PTSD checklist in the discovery cohort and the PTSD Symptom Scale in the replication cohort. RESULTS Controlling for the level of lifetime adult trauma exposure, we identified the novel association of a single-nucleotide polymorphism within the promoter region of the ADRB2 (Online Mendelian Inheritance in Man 109690) gene with PTSD symptoms in interaction with childhood trauma (rs2400707, P = 1.02 × 10-5, significant after correction for multiple comparisons). The rs2400707 A allele was associated with relative resilience to childhood adversity. An rs2400707 × childhood trauma interaction predicting adult PTSD symptoms was replicated in the independent predominantly female African American cohort. CONCLUSIONS AND RELEVANCE Altered adrenergic and noradrenergic function has been long believed to have a key etiologic role in PTSD development; however, direct evidence of this link has been missing. The rs2400707 polymorphism has been linked to function of the adrenergic system, but, to our knowledge, this is the first study to date linking the ADRB2 gene to PTSD or any psychiatric disorders. These findings have important implications for PTSD etiology, chronic pain, and stress-related comorbidity, as well as for both primary prevention and treatment strategies.
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Affiliation(s)
- Israel Liberzon
- Department of Psychiatry, University of Michigan, Ann Arbor2Veterans Affairs Ann Arbor Health System, Ann Arbor, Michigan
| | - Anthony P. King
- Department of Psychiatry, University of Michigan, Ann Arbor2Veterans Affairs Ann Arbor Health System, Ann Arbor, Michigan
| | | | | | - Peng Zhang
- The Johns Hopkins University, Baltimore, Maryland
| | - Sean T. Ma
- Department of Psychiatry, University of Michigan, Ann Arbor
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Meyer PJ, Ma ST, Robinson TE. A cocaine cue is more preferred and evokes more frequency-modulated 50-kHz ultrasonic vocalizations in rats prone to attribute incentive salience to a food cue. Psychopharmacology (Berl) 2012; 219:999-1009. [PMID: 21833503 PMCID: PMC3578944 DOI: 10.1007/s00213-011-2429-7] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Accepted: 07/26/2011] [Indexed: 11/25/2022]
Abstract
RATIONALE Individuals vary considerably in the extent to which they attribute incentive salience to food-associated cues. OBJECTIVES We asked whether individuals prone to attribute incentive salience to a food cue are also prone to attribute incentive properties to a stimulus associated with a drug of abuse-cocaine. METHODS We first identified those rats that attributed incentive salience to a food cue by quantifying the extent to which they came to approach and engage a food cue. We then used a conditioned place preference procedure to pair an injection of 10 mg/kg cocaine (i.p.) with one distinct floor texture (grid or holes) and saline with another. Following 8 days of conditioning, each rat was given a saline injection and placed into a chamber that had both floors present. We measured the time spent on each floor, and also 50-kHz ultrasonic vocalizations, which have been associated with positive affective states. RESULTS Rats that vigorously engaged the food cue ("sign trackers") expressed a preference for the cocaine-paired floor compared to those that did not ("goal trackers"). In addition, sign trackers made substantially more frequency-modulated 50-kHz vocalizations when injected with cocaine and when later exposed to the cocaine cue. CONCLUSIONS Rats prone to attribute incentive salience to a food cue are also prone to attribute incentive motivational properties to a tactile cue associated with cocaine. We suggest that individuals prone to attribute incentive salience to reward cues will have difficulty resisting them and, therefore, may be especially vulnerable to develop impulse control disorders, including addiction.
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Affiliation(s)
- Paul J Meyer
- Department of Psychology, The University of Michigan, East Hall, 530 Church Street, Ann Arbor, MI 48109-1109, USA.
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Kane JR, Ciucci MR, Jacobs AN, Tews N, Russell JA, Ahrens AM, Ma ST, Britt JM, Cormack LK, Schallert T. Assessing the role of dopamine in limb and cranial-oromotor control in a rat model of Parkinson's disease. J Commun Disord 2011; 44:529-37. [PMID: 21820129 PMCID: PMC3278988 DOI: 10.1016/j.jcomdis.2011.04.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
UNLABELLED Parkinson's disease (PD) is a neurodegenerative disorder primarily characterized by sensorimotor dysfunction. The neuropathology of PD includes a loss of dopamine (DA) neurons of the nigrostriatal pathway. Classic signs of the disease include rigidity, bradykinesia, and postural instability. However, as many as 90% of patients also experience significant deficits in speech, swallowing (including mastication), and respiratory control. Oromotor deficits such as these are underappreciated, frequently emerging during the early, often hemi-Parkinson, stage of the disease. In this paper, we review tests commonly used in our labs to model early and hemi-Parkinson deficits in rodents. We have recently expanded our tests to include sensitive models of oromotor deficits. This paper discusses the most commonly used tests in our lab to model both limb and oromotor deficits, including tests of forelimb-use asymmetry, postural instability, vibrissae-evoked forelimb placing, single limb akinesia, dry pasta handling, sunflower seed shelling, and acoustic analyses of ultrasonic vocalizations and pasta biting strength. In particular, we lay new groundwork for developing methods for measuring abnormalities in the acoustic patterns during eating that indicate decreased biting strength and irregular intervals between bites in the hemi-Parkinson rat. Similar to limb motor deficits, oromotor deficits, at least to some degree, appear to be modulated by nigrostriatal DA. Finally, we briefly review the literature on targeted motor rehabilitation effects in PD models. LEARNING OUTCOMES Readers will: (a) understand how a unilateral lesion to the nigrostriatal pathway affects limb use, (b) understand how a unilateral lesion to the nigrostriatal pathway affects oromotor function, and (c) gain an understanding of how limb motor deficits and oromotor deficits appear to involve dopamine and are modulated by training.
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Affiliation(s)
- Jacqueline R Kane
- Department of Psychology, The University of Texas at Austin, Austin, TX, USA.
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Maier EY, Ma ST, Ahrens A, Schallert TJ, Duvauchelle CL. Assessment of ultrasonic vocalizations during drug self-administration in rats. J Vis Exp 2010:2041. [PMID: 20689507 DOI: 10.3791/2041] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Drug self-administration procedures are commonly used to study behavioral and neurochemical changes associated with human drug abuse, addiction and relapse. Various types of behavioral activity are commonly utilized as measures of drug motivation in animals. However, a crucial component of drug abuse relapse in abstinent cocaine users is "drug craving", which is difficult to model in animals, as it often occurs in the absence of overt behaviors. Yet, it is possible that a class of ultrasonic vocalizations (USVs) in rats may be a useful marker for affective responses to drug administration, drug anticipation and even drug craving. Rats vocalize in ultrasonic frequencies that serve as a communicatory function and express subjective emotional states. Several studies have shown that different call frequency ranges are associated with negative and positive emotional states. For instance, high frequency calls ("50-kHz") are associated with positive affect, whereas low frequency calls ("22-kHz") represent a negative emotional state. This article describes a procedure to assess rat USVs associated with daily cocaine self-administration. For this procedure, we utilized standard single-lever operant chambers housed within sound-attenuating boxes for cocaine self-administration sessions and utilized ultrasonic microphones, multi-channel recording hardware and specialized software programs to detect and analyze USVs. USVs measurements reflect emotionality of rats before, during and after drug availability and can be correlated with commonly assessed drug self-administration behavioral data such lever responses, inter-response intervals and locomotor activity. Since USVs can be assessed during intervals prior to drug availability (e.g., anticipatory USVs) and during drug extinction trials, changes in affect associated with drug anticipation and drug abstinence can also be determined. In addition, determining USV changes over the course of short- and long-term drug exposure can provide a more detailed interpretation of drug exposure effects on affective functioning.
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Affiliation(s)
- Esther Y Maier
- College of Pharmacy, Division of Pharmacology and Toxicology, University of Texas at Austin, TX, USA
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Ma ST, Maier EY, Ahrens AM, Schallert T, Duvauchelle CL. Repeated intravenous cocaine experience: development and escalation of pre-drug anticipatory 50-kHz ultrasonic vocalizations in rats. Behav Brain Res 2010; 212:109-14. [PMID: 20382187 DOI: 10.1016/j.bbr.2010.04.001] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2010] [Revised: 03/30/2010] [Accepted: 04/01/2010] [Indexed: 10/19/2022]
Abstract
Ultrasonic vocalization (USV) in the 50-kHz range occurs in rats immediately upon first-time exposure to cocaine or amphetamine, and rapidly increases with repetitive drug exposure at the same dose. This sensitized positive-affect response to these drugs of abuse is persistent in that the peak level of USVs again appears when the drug is reintroduced after several weeks of drug discontinuation. The present study explored whether with enough experience USVs might be elicited, and gradually escalate, in anticipation of impending drug delivery. Rats were trained to self-administer (SA) cocaine intravenously by lever pressing 5 days per week for 4 weeks. Yoked rats received experimenter-delivered cocaine matching that of SA rats. USVs and locomotor activity were recorded during each 10-min period prior to 60-min drug access sessions. Extinction trials in which drug access was denied were then carried out over an additional 4-week period. After about a week of cocaine experience, both the SA and yoked groups began to progressively increase USVs when placed in an environment that predicted forthcoming drug exposure. Extinction of anticipatory calls and locomotion occurred over days after drug access ended. USVs may be a useful model for specifically investigating the neural basis of drug anticipation and aid in developing and assessing new addiction treatment strategies for reducing craving and relapse.
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Affiliation(s)
- Sean T Ma
- Department of Psychology and Institute for Neuroscience, University of Texas, Austin, TX 78712, USA
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Ciucci MR, Ahrens AM, Ma ST, Kane JR, Windham EB, Woodlee MT, Schallert T. Reduction of dopamine synaptic activity: degradation of 50-kHz ultrasonic vocalization in rats. Behav Neurosci 2009; 123:328-36. [PMID: 19331456 PMCID: PMC2737695 DOI: 10.1037/a0014593] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Vocal deficits are prevalent and debilitating in Parkinson's disease. These deficits may be related to the initial pathology of the nigrostriatal dopamine neurons and resulting dopamine depletion, which contributes to dysfunction of fine motor control in multiple functions. Although vocalization in animals and humans may differ in many respects, we evaluated complex (50-kHz) ultrasonic mate calls in 2 rat models of Parkinson's disease, including unilateral infusions of 6-hydroxydopamine to the medial forebrain bundle and peripheral administration of a nonakinesia dose of the dopamine antagonist haloperidol. We examined the effects of these treatments on multiple aspects of the acoustic signal. The number of trill-like (frequency modulated) 50-kHz calls was significantly reduced, and appeared to be replaced by simpler (flat) calls. The bandwidth and maximum intensity of simple and frequency-modulated calls were significantly decreased, but call duration was not. Our findings suggest that the nigrostriatal dopamine pathway is involved to some extent in fine sensorimotor function that includes USV production and complexity.
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Ahrens AM, Ma ST, Maier EY, Duvauchelle CL, Schallert T. Repeated intravenous amphetamine exposure: rapid and persistent sensitization of 50-kHz ultrasonic trill calls in rats. Behav Brain Res 2008; 197:205-9. [PMID: 18809437 DOI: 10.1016/j.bbr.2008.08.037] [Citation(s) in RCA: 123] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2008] [Revised: 08/14/2008] [Accepted: 08/20/2008] [Indexed: 11/26/2022]
Abstract
Short 50-kilohertz (kHz) range frequency-modulated ultrasonic vocalizations (USVs) produced by rats and mice are unconditionally elicited by drugs of abuse or electrical stimulation that increase dopamine activity in the nucleus accumbens, and it has been suggested that they reflect "positive affect" or incentive motivational states associated with appetitive behavior. The repeated administration of amphetamine is known to not only produce "psychomotor" sensitization, but also to facilitate a number of appetitive behaviors, including conditioned drug pursuit behavior. We were interested, therefore, in whether amphetamine-induced 50-kHz USVs would also increase with repeated drug exposure. USV recordings were made during 5-min sessions immediately after a saline infusion, and again 4-5h later after 1.0mg/kg intravenous amphetamine exposure. These sessions took place every other day over a 5-day period. A challenge dose of 1.0mg/kg amphetamine was administered 2 weeks later to determine whether sensitization would persist. The initial amphetamine infusion increased 50-kHz USVs relative to the saline infusion. This effect was enhanced over trials and during the amphetamine challenge 2 weeks later. Classification of 50-kHz range call types revealed that complex frequency-modulated trill calls were sensitized by amphetamine, but not flat 50-kHz calls. It is possible that 50-kHz USV recordings could provide a potentially valuable behavioral measure of sensitization linked to enhanced incentive salience and increased tendency to self-administer drugs of abuse.
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Affiliation(s)
- Allison M Ahrens
- Department of Psychology and Institute for Neuroscience, University of Texas at Austin, TX 78712, USA
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Bohn KM, Schmidt-French B, Ma ST, Pollak GD. Syllable acoustics, temporal patterns, and call composition vary with behavioral context in Mexican free-tailed bats. J Acoust Soc Am 2008; 124:1838-1848. [PMID: 19045674 PMCID: PMC2676615 DOI: 10.1121/1.2953314] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2007] [Revised: 05/22/2008] [Accepted: 06/07/2008] [Indexed: 05/27/2023]
Abstract
Recent research has shown that some bat species have rich vocal repertoires with diverse syllable acoustics. Few studies, however, have compared vocalizations across different behavioral contexts or examined the temporal emission patterns of vocalizations. In this paper, a comprehensive examination of the vocal repertoire of Mexican free-tailed bats, T. brasiliensis, is presented. Syllable acoustics and temporal emission patterns for 16 types of vocalizations including courtship song revealed three main findings. First, although in some cases syllables are unique to specific calls, other syllables are shared among different calls. Second, entire calls associated with one behavior can be embedded into more complex vocalizations used in entirely different behavioral contexts. Third, when different calls are composed of similar syllables, distinctive temporal emission patterns may facilitate call recognition. These results indicate that syllable acoustics alone do not likely provide enough information for call recognition; rather, the acoustic context and temporal emission patterns of vocalizations may affect meaning.
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Affiliation(s)
- Kirsten M Bohn
- Section of Neurobiology, University of Texas at Austin, Austin, Texas 78712, USA.
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Ciucci MR, Ma ST, Kane JR, Ahrens AM, Schallert T. Limb use and complex ultrasonic vocalization in a rat model of Parkinson's disease: deficit-targeted training. Parkinsonism Relat Disord 2008; 14 Suppl 2:S172-5. [PMID: 18585950 PMCID: PMC2737701 DOI: 10.1016/j.parkreldis.2008.04.027] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Recent evidence in animal models of Parkinson's disease (PD) suggests that exercise and other forms of motor enhancement can be beneficial when applied during the degeneration of dopamine neurons. Behaviours that depend on adequate levels of striatal dopamine may provide particularly favourable targets for therapeutic motor interventions. Task-specific motor enrichment procedures have been used to improve functional and neural outcomes following unilateral infusions of 6-hydroxydopamine (6-OHDA) into the nigrostriatal pathway in rats. In contrast, forced non-use procedures can exaggerate the degree of degeneration. Limb-use akinesia and ultrasonic vocalization in the 50-kHz range may be useful behavioural indices of nigrostriatal integrity and may model common deficits found in PD. These deficits in movement initiation and fine sensorimotor control are potential targets for early training interventions.
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Affiliation(s)
- Michelle R Ciucci
- Department of Psychology, University of Texas, 1 University Station A8000, Austin, TX 78712, USA
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Ciucci MR, Ma ST, Fox C, Kane JR, Ramig LO, Schallert T. Qualitative changes in ultrasonic vocalization in rats after unilateral dopamine depletion or haloperidol: a preliminary study. Behav Brain Res 2007; 182:284-9. [PMID: 17397940 PMCID: PMC1993917 DOI: 10.1016/j.bbr.2007.02.020] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2006] [Revised: 02/08/2007] [Accepted: 02/09/2007] [Indexed: 10/23/2022]
Abstract
The sensorimotor speech/voice deficits associated with Parkinson disease have been well documented in humans. They are largely resistant to pharmacological and surgical treatment, but respond to intensive speech therapy. The mechanisms underlying this phenomenon are not well understood and are difficult to systematically test in humans. Thus, we turn to the rat as a model. The purpose of this study is to compare the ultrasonic vocalization (USV) of rats in three conditions: control, haloperidol-induced transient dopamine depletion, and unilateral 6-hydroxydopamine (6-OHDA) induced moderately-severe degeneration of dopamine neurons. It was hypothesized that both dopamine-altered conditions would lead to a change in the features of the USV acoustic signal. Results demonstrated that bandwidth decreased in the dopamine-altered rats. This is the first study to document a degradation of the acoustic signal of frequency-modulated 50-kHz calls as a result of interfering with dopamine synaptic transmission in rats. The data suggest that mild transient dopamine depletion with haloperidol or even unilateral degeneration of dopamine neurons is associated with changes in the USV acoustic signal. Dopaminergic dysfunction influences USV quality without reducing the number of calls. This study provides a foundation to examine the role of dopamine in sensorimotor processes underlying USV production and potentially to explore treatments for dopamine deficiency-related impaired vocal outcome.
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Affiliation(s)
- Michelle R Ciucci
- Department of Communication Sciences and Disorders, University of Texas, Austin, TX 78712, USA.
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Ma ST. [Ultrastructure of lens fibers of the normal rabbit eye]. Zhonghua Yan Ke Za Zhi 1982; 18:153-5. [PMID: 6813071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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