Pub Date : 2022-11-01Epub Date: 2022-09-12DOI: 10.1055/s-0042-1756272
Shawna Fleming, Brittany Clark
Aphasia is an acquired disorder affecting all language components across modalities. While common therapeutic approaches can result in some improvements, multiple studies establish that intensive therapeutic interventions are most effective; however, these approaches are not well defined. In addition, behaviorally-oriented approaches have been shown to be effective for other conditions, but have not yet been introduced to the treatment of aphasia. The purpose of the current study was to examine the efficacy of a novel, behaviorally-oriented, intensive communication intervention for aphasia (BICA) designed by a speech-language pathologist (second author) and a Board Certified Behavior Analyst (first author) for a 71-year-old woman with post-stroke aphasia. Using a case study design, the participant was provided with 12 hours/week of therapy for 12 weeks focusing on functional communication goals using a behavioral interpretation of language and stimulus control transfer procedures. The behavior analyst determined conceptually systematic interventions based on targets selected by the speech-language pathologist. The participant demonstrated substantial improvements in written language expression and comprehension, reading fluency, oral language expression, naming, and improved quality of life. Given the substantial gains the participant made in oral and written language post-stroke using the BICA therapy, further study is warranted.
{"title":"Behaviorally-Oriented Intensive Aphasia Program: Collaboration Leads to Optimal Outcomes.","authors":"Shawna Fleming, Brittany Clark","doi":"10.1055/s-0042-1756272","DOIUrl":"https://doi.org/10.1055/s-0042-1756272","url":null,"abstract":"<p><p>Aphasia is an acquired disorder affecting all language components across modalities. While common therapeutic approaches can result in some improvements, multiple studies establish that intensive therapeutic interventions are most effective; however, these approaches are not well defined. In addition, behaviorally-oriented approaches have been shown to be effective for other conditions, but have not yet been introduced to the treatment of aphasia. The purpose of the current study was to examine the efficacy of a novel, behaviorally-oriented, intensive communication intervention for aphasia (BICA) designed by a speech-language pathologist (second author) and a Board Certified Behavior Analyst (first author) for a 71-year-old woman with post-stroke aphasia. Using a case study design, the participant was provided with 12 hours/week of therapy for 12 weeks focusing on functional communication goals using a behavioral interpretation of language and stimulus control transfer procedures. The behavior analyst determined conceptually systematic interventions based on targets selected by the speech-language pathologist. The participant demonstrated substantial improvements in written language expression and comprehension, reading fluency, oral language expression, naming, and improved quality of life. Given the substantial gains the participant made in oral and written language post-stroke using the BICA therapy, further study is warranted.</p>","PeriodicalId":48772,"journal":{"name":"Seminars in Speech and Language","volume":"43 5","pages":"391-405"},"PeriodicalIF":1.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33463285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
School-age children encounter expository discourse daily in the classroom, and skilled understanding and production of expository language is critical for academic success. The purpose of this study was to compare children's production of two types of expository discourse, generation and retell, while employing a scaffolded note-taking procedure to assist children in developing their samples. Twenty-six typically developing children, 9 to 12 years of age, participated in the study. For the expository generation task, children gave an explanation of a favorite activity, and for the retell task they viewed a video and provided an explanation of the information in the video. Overall, expository generation samples were longer and richer in content, but expository retell samples demonstrated greater lexical diversity. In addition, generation samples contained fewer grammatical errors than retell samples (trend), but measures of syntactic complexity, which were positively related across tasks, were not significantly different between sample types. Findings suggest that using a scaffolded procedure for supporting expository production resulted in (1) samples that were long enough for valid analysis of the children's language and (2) the production of utterances that, on average, were longer than reported in similar studies without scaffolding. The potential impact of comprehension on retell task performance is discussed.
{"title":"Expository Discourse Production in School-Age Children across Two Scaffolded Tasks.","authors":"Anna M Guilkey, Stacy A. Wagovich","doi":"10.1055/s-0042-1756645","DOIUrl":"https://doi.org/10.1055/s-0042-1756645","url":null,"abstract":"School-age children encounter expository discourse daily in the classroom, and skilled understanding and production of expository language is critical for academic success. The purpose of this study was to compare children's production of two types of expository discourse, generation and retell, while employing a scaffolded note-taking procedure to assist children in developing their samples. Twenty-six typically developing children, 9 to 12 years of age, participated in the study. For the expository generation task, children gave an explanation of a favorite activity, and for the retell task they viewed a video and provided an explanation of the information in the video. Overall, expository generation samples were longer and richer in content, but expository retell samples demonstrated greater lexical diversity. In addition, generation samples contained fewer grammatical errors than retell samples (trend), but measures of syntactic complexity, which were positively related across tasks, were not significantly different between sample types. Findings suggest that using a scaffolded procedure for supporting expository production resulted in (1) samples that were long enough for valid analysis of the children's language and (2) the production of utterances that, on average, were longer than reported in similar studies without scaffolding. The potential impact of comprehension on retell task performance is discussed.","PeriodicalId":48772,"journal":{"name":"Seminars in Speech and Language","volume":"43 5 1","pages":"406-425"},"PeriodicalIF":1.0,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44487422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Researcher-initiated research often has little or no input from the groups who will be affected by the results of the research. The aim of this project was to describe practices of embracing patient-partners (i.e., individuals with aphasia and spouses/family members) in research. Six webinars were developed for both researchers and patient-partners that were required prior to participating in a joint conference that focused on collaborative research teams. The conference was designed based on an appreciative inquiry approach. Including patient-partners into research priorities and planning has been accomplished across various health domains in the United States, but this was the first organized national effort, in the United States, to support the inclusion of people with aphasia and their families as active partners in the research process. Consequently, it is hoped that future aphasia researchers also include patient-partner teams into their research process for more ecologically valid outcomes.
{"title":"Building Research Initiatives by Developing Group Effort (BRIDGE): Patient-Partners in Aphasia Research","authors":"A. Brice, J. Hinckley","doi":"10.1055/s-0042-1756644","DOIUrl":"https://doi.org/10.1055/s-0042-1756644","url":null,"abstract":"Researcher-initiated research often has little or no input from the groups who will be affected by the results of the research. The aim of this project was to describe practices of embracing patient-partners (i.e., individuals with aphasia and spouses/family members) in research. Six webinars were developed for both researchers and patient-partners that were required prior to participating in a joint conference that focused on collaborative research teams. The conference was designed based on an appreciative inquiry approach. Including patient-partners into research priorities and planning has been accomplished across various health domains in the United States, but this was the first organized national effort, in the United States, to support the inclusion of people with aphasia and their families as active partners in the research process. Consequently, it is hoped that future aphasia researchers also include patient-partner teams into their research process for more ecologically valid outcomes.","PeriodicalId":48772,"journal":{"name":"Seminars in Speech and Language","volume":"43 1","pages":"426 - 444"},"PeriodicalIF":1.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49390094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01Epub Date: 2022-07-27DOI: 10.1055/s-0042-1750350
Tiffany L Hutchins
Compared with their neurotypical (NT) counterparts, persons with autism appear to be less inclined to tell lies and less skilled in delivering sophisticated forms of deception. At the same time, some forms of deception like white lies and prosocial lies are frequent in human interaction because they are important for social success. This article challenges the reader to evaluate the therapeutic potential for prosocial deception and teaching white-lie telling to autistic persons. The nature and development of antisocial and prosocial lying in NT development and autism are reviewed. Considerations for when to (and when not to) teach the skill of empathic lying are discussed and recommendations for how to teach the comprehension and production of prosocial lies are offered.
与神经畸形(NT)患者相比,自闭症患者似乎不太愿意说谎话,也不太会使用复杂的欺骗手段。与此同时,某些形式的欺骗,如 "白色谎言 "和 "亲社会谎言 "在人际交往中却很常见,因为它们对社交成功非常重要。这篇文章向读者提出了一个挑战,即如何评估亲社会欺骗的治疗潜力,以及如何教自闭症患者说白色谎言。文章回顾了 NT 发育和自闭症中反社会和亲社会说谎的性质和发展。讨论了何时(以及何时不)教授共情谎言技能的考虑因素,并就如何教授理解和制作亲社会谎言提出了建议。
{"title":"A Review of the Nature and Development of Lying and Deception and Considerations for Teaching Prosocial Lying to Autistic Persons.","authors":"Tiffany L Hutchins","doi":"10.1055/s-0042-1750350","DOIUrl":"10.1055/s-0042-1750350","url":null,"abstract":"<p><p>Compared with their neurotypical (NT) counterparts, persons with autism appear to be less inclined to tell lies and less skilled in delivering sophisticated forms of deception. At the same time, some forms of deception like white lies and prosocial lies are frequent in human interaction because they are important for social success. This article challenges the reader to evaluate the therapeutic potential for prosocial deception and teaching white-lie telling to autistic persons. The nature and development of antisocial and prosocial lying in NT development and autism are reviewed. Considerations for when to (and when not to) teach the skill of empathic lying are discussed and recommendations for how to teach the comprehension and production of prosocial lies are offered.</p>","PeriodicalId":48772,"journal":{"name":"Seminars in Speech and Language","volume":"43 4","pages":"316-330"},"PeriodicalIF":1.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40551421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01Epub Date: 2022-07-27DOI: 10.1055/s-0042-1750815
Pamela J Crooke, Michelle Garcia Winner
On any given day, the social mind is taxed with attending to and making sense of a myriad of social events. The social mind is at work when trying to imagine the experiences of others and their inner mental worlds, and is equally active when people seek to approach, connect with, and sometimes avoid one another. Ultimately, the social mind is responsible for thinking about (social) thinking, or social metacognition. Social metacognitive teaching strategies can be helpful for supporting social learners as they observe social landscapes, interpret what is observed to problem solve, or decide whether and how to produce social responses. This article describes how social metacognitive strategies from the Social Thinking Methodology have been used to support the self-determined social goals of two autistic students. Visual frameworks and their underlying theories are provided as evidence-aligned tools for supporting clinical journeys.
{"title":"Social Thinking Metacognitive Strategies to Support Self-Determined Social Goals in Autistic Youth.","authors":"Pamela J Crooke, Michelle Garcia Winner","doi":"10.1055/s-0042-1750815","DOIUrl":"https://doi.org/10.1055/s-0042-1750815","url":null,"abstract":"<p><p>On any given day, the social mind is taxed with attending to and making sense of a myriad of social events. The social mind is at work when trying to imagine the experiences of others and their inner mental worlds, and is equally active when people seek to approach, connect with, and sometimes avoid one another. Ultimately, the social mind is responsible for thinking about (social) thinking, or social metacognition. Social metacognitive teaching strategies can be helpful for supporting social learners as they observe social landscapes, interpret what is observed to problem solve, or decide whether and how to produce social responses. This article describes how social metacognitive strategies from the Social Thinking Methodology have been used to support the self-determined social goals of two autistic students. Visual frameworks and their underlying theories are provided as evidence-aligned tools for supporting clinical journeys.</p>","PeriodicalId":48772,"journal":{"name":"Seminars in Speech and Language","volume":"43 4","pages":"277-298"},"PeriodicalIF":1.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40551419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01Epub Date: 2022-07-27DOI: 10.1055/s-0042-1750814
Tiffany L Hutchins
The development of humor is complex and heterogeneous within and across neurotypical and neurodivergent groups. Some autistics develop differences (not deficits) in humor appreciation, whereas others report difficulties "getting the joke" and identify this as in need of support. This is important because humor appreciation and comprehension are linked to psychological well-being and social success. This article describes the therapeutic potential for teaching humor comprehension to autistic persons and the benefit of broader education efforts to forge an understanding of the value of "different senses of humor." The nature and development of humor comprehension in neurotypical development and autism are reviewed. Considerations for whether and how to teach humor comprehension are offered that maximize goodness-of-fit, prioritize autistic autonomy, and promote the sharing and appreciation of different kinds of "funny."
{"title":"A Review of the Nature and Development of Humor Appreciation and Considerations for Teaching Humor to Autistic Persons.","authors":"Tiffany L Hutchins","doi":"10.1055/s-0042-1750814","DOIUrl":"10.1055/s-0042-1750814","url":null,"abstract":"<p><p>The development of humor is complex and heterogeneous within and across neurotypical and neurodivergent groups. Some autistics develop differences (not deficits) in humor appreciation, whereas others report difficulties \"getting the joke\" and identify this as in need of support. This is important because humor appreciation and comprehension are linked to psychological well-being and social success. This article describes the therapeutic potential for teaching humor comprehension to autistic persons and the benefit of broader education efforts to forge an understanding of the value of \"different senses of humor.\" The nature and development of humor comprehension in neurotypical development and autism are reviewed. Considerations for whether and how to teach humor comprehension are offered that maximize goodness-of-fit, prioritize autistic autonomy, and promote the sharing and appreciation of different kinds of \"funny.\"</p>","PeriodicalId":48772,"journal":{"name":"Seminars in Speech and Language","volume":"43 4","pages":"347-360"},"PeriodicalIF":1.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40551423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01Epub Date: 2022-07-27DOI: 10.1055/s-0042-1750763
Rachel G McDonald, Sadaf Khawar, Nardin Yacoub, Mary Isaac Cargill, Matthew D Lerner, Erin Kang
Social skills interventions (SSIs) are commonly used to improve social functioning in youth with autism spectrum disorder (ASD), which is a condition characterized by differences in social cognition and social communication. Although more traditional SSIs have used knowledge-based, didactic instruction, recent research has explored the utility of performance-based SSIs, which use various activities to support implicit learning of social skills in supportive, enriched environments. This article reviews the extant literature evaluating the effectiveness or efficacy of five performance-based SSIs using theater-based approaches on social cognition and social communication. Overall, this body of literature suggests social communication gains that include increased peer interactions, peer liking, and reciprocal friendships, as well as social cognitive gains in theory of mind and affect recognition. This review also discusses theoretical models that may help explain the emerging strengths of performance- and theater-based SSIs with underlying hypotheses related to the social communication and social cognitive differences in ASD. Limitations of performance-based SSIs in the evidence-base include several approaches in initial stages of research with small sample sizes and limited maintenance of effects. Future research should aim to bridge the research-to-practice gap and use more rigorous designs and more diverse samples, including those with cooccurring intellectual disability.
{"title":"Performance- and Theater-Based Interventions for Supporting Social Cognition and Social Communication in Autistic Youth: A Review and Theoretical Synthesis.","authors":"Rachel G McDonald, Sadaf Khawar, Nardin Yacoub, Mary Isaac Cargill, Matthew D Lerner, Erin Kang","doi":"10.1055/s-0042-1750763","DOIUrl":"https://doi.org/10.1055/s-0042-1750763","url":null,"abstract":"<p><p>Social skills interventions (SSIs) are commonly used to improve social functioning in youth with autism spectrum disorder (ASD), which is a condition characterized by differences in social cognition and social communication. Although more traditional SSIs have used knowledge-based, didactic instruction, recent research has explored the utility of performance-based SSIs, which use various activities to support implicit learning of social skills in supportive, enriched environments. This article reviews the extant literature evaluating the effectiveness or efficacy of five performance-based SSIs using theater-based approaches on social cognition and social communication. Overall, this body of literature suggests social communication gains that include increased peer interactions, peer liking, and reciprocal friendships, as well as social cognitive gains in theory of mind and affect recognition. This review also discusses theoretical models that may help explain the emerging strengths of performance- and theater-based SSIs with underlying hypotheses related to the social communication and social cognitive differences in ASD. Limitations of performance-based SSIs in the evidence-base include several approaches in initial stages of research with small sample sizes and limited maintenance of effects. Future research should aim to bridge the research-to-practice gap and use more rigorous designs and more diverse samples, including those with cooccurring intellectual disability.</p>","PeriodicalId":48772,"journal":{"name":"Seminars in Speech and Language","volume":"43 4","pages":"255-276"},"PeriodicalIF":1.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40551418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01Epub Date: 2022-07-27DOI: 10.1055/s-0042-1750348
Carol Westby
Children diagnosed with autism spectrum disorder (ASD) exhibit early delays and deficits in play. In infancy, they engage in unusual exploratory behaviors with toys. As toddlers, they are slow to develop functional play, and in preschool some children with ASD fail to develop symbolic play despite having the necessary cognitive and language skills. Furthermore, when children with ASD are engaged in play, they demonstrate less playfulness. This article reviews the literature on the characteristics of exploratory, functional, and symbolic/pretend play in children with ASD and possible reasons for their unusual patterns of play development. Increased quantity and quality of play are frequent therapeutic goals for children with ASD. If play interventions are to be successful, it is critical that speech-language pathologists have an adequate assessment of children's play skills. Several frameworks and tools appropriate for assessing play in typical children and children with ASD are described.
{"title":"Playing to Pretend or \"Pretending\" to Play: Play in Children with Autism Spectrum Disorder.","authors":"Carol Westby","doi":"10.1055/s-0042-1750348","DOIUrl":"https://doi.org/10.1055/s-0042-1750348","url":null,"abstract":"<p><p>Children diagnosed with autism spectrum disorder (ASD) exhibit early delays and deficits in play. In infancy, they engage in unusual exploratory behaviors with toys. As toddlers, they are slow to develop functional play, and in preschool some children with ASD fail to develop symbolic play despite having the necessary cognitive and language skills. Furthermore, when children with ASD are engaged in play, they demonstrate less playfulness. This article reviews the literature on the characteristics of exploratory, functional, and symbolic/pretend play in children with ASD and possible reasons for their unusual patterns of play development. Increased quantity and quality of play are frequent therapeutic goals for children with ASD. If play interventions are to be successful, it is critical that speech-language pathologists have an adequate assessment of children's play skills. Several frameworks and tools appropriate for assessing play in typical children and children with ASD are described.</p>","PeriodicalId":48772,"journal":{"name":"Seminars in Speech and Language","volume":"43 4","pages":"331-346"},"PeriodicalIF":1.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40551422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01Epub Date: 2022-07-27DOI: 10.1055/s-0042-1750349
Ashley Brien, Tiffany Hutchins
Episodic memory (EM) is memory for past personal experiences. EM and social development are inextricably linked, and both are impacted in autistic persons. Parents of autistic children can be taught to engage in a unique conversational style (i.e., elaborative reminiscing) to support a child's memory and social development. This article discusses the importance of EM in autism and describes a new manualized caregiver training to support EM in autistic children. An uncontrolled pre-post study design was employed to test proof of concept. Results affirmed the potential of this intervention for increasing caregivers' elaborateness and improving children's EM in a family-centered, naturalistic way. Results suggest that further treatment development and examination of effectiveness are needed. We argue that these kinds of intervention are important: not only is EM theoretically potent for social cognitive development, it is essential for a sense of self-determination, social connection, and psychological well-being.
{"title":"Development of a Manualized Intervention to Support Episodic Memory in Autistic Children: Elaborative Reminiscing Is Key.","authors":"Ashley Brien, Tiffany Hutchins","doi":"10.1055/s-0042-1750349","DOIUrl":"https://doi.org/10.1055/s-0042-1750349","url":null,"abstract":"<p><p>Episodic memory (EM) is memory for past personal experiences. EM and social development are inextricably linked, and both are impacted in autistic persons. Parents of autistic children can be taught to engage in a unique conversational style (i.e., elaborative reminiscing) to support a child's memory and social development. This article discusses the importance of EM in autism and describes a new manualized caregiver training to support EM in autistic children. An uncontrolled pre-post study design was employed to test proof of concept. Results affirmed the potential of this intervention for increasing caregivers' elaborateness and improving children's EM in a family-centered, naturalistic way. Results suggest that further treatment development and examination of effectiveness are needed. We argue that these kinds of intervention are important: not only is EM theoretically potent for social cognitive development, it is essential for a sense of self-determination, social connection, and psychological well-being.</p>","PeriodicalId":48772,"journal":{"name":"Seminars in Speech and Language","volume":"43 4","pages":"299-315"},"PeriodicalIF":1.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40551420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-30eCollection Date: 2022-06-01DOI: 10.1002/mlf2.12031
Jin Yang, Jessica T Barra, Danny K Fung, Jue D Wang
Antibiotics combat bacteria through their bacteriostatic (by growth inhibition) or bactericidal (by killing bacteria) action. Mechanistically, it has been proposed that bactericidal antibiotics trigger cellular damage, while bacteriostatic antibiotics suppress cellular metabolism. Here, we demonstrate how the difference between bacteriostatic and bactericidal activities of the antibiotic chloramphenicol can be attributed to an antibiotic-induced bacterial protective response: the stringent response. Chloramphenicol targets the ribosome to inhibit the growth of the Gram-positive bacterium Bacillus subtilis. Intriguingly, we found that chloramphenicol becomes bactericidal in B. subtilis mutants unable to produce (p)ppGpp. We observed a similar (p)ppGpp-dependent bactericidal effect of chloramphenicol in the Gram-positive pathogen Enterococcus faecalis. In B. subtilis, chloramphenicol treatment induces (p)ppGpp accumulation through the action of the (p)ppGpp synthetase RelA. (p)ppGpp subsequently depletes the intracellular concentration of GTP and antagonizes GTP action. This GTP regulation is critical for preventing chloramphenicol from killing B. subtilis, as bypassing (p)ppGpp-dependent GTP regulation potentiates chloramphenicol killing, while reducing GTP synthesis increases survival. Finally, chloramphenicol treatment protects cells from the classical bactericidal antibiotic vancomycin, reminiscent of the clinical phenomenon of antibiotic antagonism. Taken together, our findings suggest a role of (p)ppGpp in the control of the bacteriostatic and bactericidal activity of antibiotics in Gram-positive bacteria, which can be exploited to potentiate the efficacy of existing antibiotics.
{"title":"<i>Bacillus subtilis</i> produces (p)ppGpp in response to the bacteriostatic antibiotic chloramphenicol to prevent its potential bactericidal effect.","authors":"Jin Yang, Jessica T Barra, Danny K Fung, Jue D Wang","doi":"10.1002/mlf2.12031","DOIUrl":"10.1002/mlf2.12031","url":null,"abstract":"<p><p>Antibiotics combat bacteria through their bacteriostatic (by growth inhibition) or bactericidal (by killing bacteria) action. Mechanistically, it has been proposed that bactericidal antibiotics trigger cellular damage, while bacteriostatic antibiotics suppress cellular metabolism. Here, we demonstrate how the difference between bacteriostatic and bactericidal activities of the antibiotic chloramphenicol can be attributed to an antibiotic-induced bacterial protective response: the stringent response. Chloramphenicol targets the ribosome to inhibit the growth of the Gram-positive bacterium <i>Bacillus subtilis</i>. Intriguingly, we found that chloramphenicol becomes bactericidal in <i>B. subtilis</i> mutants unable to produce (p)ppGpp. We observed a similar (p)ppGpp-dependent bactericidal effect of chloramphenicol in the Gram-positive pathogen <i>Enterococcus faecalis</i>. In <i>B. subtilis</i>, chloramphenicol treatment induces (p)ppGpp accumulation through the action of the (p)ppGpp synthetase RelA. (p)ppGpp subsequently depletes the intracellular concentration of GTP and antagonizes GTP action. This GTP regulation is critical for preventing chloramphenicol from killing <i>B. subtilis</i>, as bypassing (p)ppGpp-dependent GTP regulation potentiates chloramphenicol killing, while reducing GTP synthesis increases survival. Finally, chloramphenicol treatment protects cells from the classical bactericidal antibiotic vancomycin, reminiscent of the clinical phenomenon of antibiotic antagonism. Taken together, our findings suggest a role of (p)ppGpp in the control of the bacteriostatic and bactericidal activity of antibiotics in Gram-positive bacteria, which can be exploited to potentiate the efficacy of existing antibiotics.</p>","PeriodicalId":48772,"journal":{"name":"Seminars in Speech and Language","volume":"40 1","pages":"101-113"},"PeriodicalIF":5.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10989873/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75806256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}