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1.
Scand J Occup Ther ; 31(1): 2361649, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38864428

RESUMO

BACKGROUND: Research has identified diverse constraints to the adoption of school-based occupational therapy approaches and a lack of attention to addressing the barriers to children's play opportunities. Critical contextualised research is advocated to inform practice possibilities. AIMS/OBJECTIVES: This inquiry aimed to explore with occupational therapists their existing practices in Irish schoolyards to generate practice possibilities concerned with play, as an issue of occupational justice. MATERIALS AND METHODS: Using the theory of practice architectures, six occupational therapists from diverse sites of practice participated in the first phase of a critical action research process using dialogical focus group and occupational mapping methods. RESULTS: Three themes were generated (1) Existing practices as situated (2) (Re)mattering play and practices as occupations and (3) Practice possibilities - 'Finding the play' between responsiveness and responsibilities. A further interrelated dimension was how the research methods provided mechanisms of raising consciousness. CONCLUSIONS, AND SIGNIFICANCE: Alongside constructing knowledges on existing practices in an Irish context, this inquiry contributes to understandings of practices as socially embedded generative processes of 'finding the play', highlighting ethical responsibilities to make visible inequities reproduced in habitual practices and engage in relationships of solidarity to (re)construct alternative shared practices.


Assuntos
Grupos Focais , Terapeutas Ocupacionais , Terapia Ocupacional , Jogos e Brinquedos , Humanos , Irlanda , Terapeutas Ocupacionais/psicologia , Instituições Acadêmicas , Criança , Masculino
2.
Assist Technol ; : 1-8, 2024 Apr 26.
Artigo em Inglês | MEDLINE | ID: mdl-38669058

RESUMO

This paper describes the development, translation, and early evaluation of the Arabic Psychosocial Impact of Assistive Devices Scale (AR-PIADS), an outcome measure instrument for the subjective impact of Assistive Technology on a person with a disabilities' quality of life. Developing the AR = PIADS instrument involved forward and backward translation by two independent teams of bilingual, Arabic-English speakers (n = 5) and a quality and usability review by a panel of people with disabilities (n = 18). The emergent version was evaluated with a group of experienced Arabic-speaking Assistive Technology users (n = 67) for its psychometric properties. Initial results demonstrate a favorable comparison for 16 of the 26 questionnaire items with scores recorded for the original, English language version. Internal consistency, measured using Cronbach's alpha, yielded a range of 0.97-0.99 for AR-PIADS while the new instrument's reliability was assessed using an intraclass correlation coefficient resulting in scores within the range of 0.86-0.97 for the overall instrument. Despite these positive results however, the translation process did highlight a number of challenges with language and cultural interpretation of the translated instrument. This suggests that further work is warranted to explore its utility in service provision.

3.
Scand J Occup Ther ; 30(8): 1460-1471, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37917097

RESUMO

BACKGROUND: Digital spaces are rapidly emerging as a space for children to engage in autotelic play. AIM: To explore and describe children's experiences of choice-making in their play in digital spaces from the perspective of children themselves. METHODS: Focus groups were conducted with a total of eight children aged six years of age within their school, in a large city in Ireland. A Mosaic Approach with drawing, cutting, and colouring in was used to elicit the children's voices to ensure their active engagement throughout the data collection. Data was analyzed using focus group analysis. RESULTS: Data analysis revealed three main themes; children enjoy the ability to make choices in their play, that they are often constrained in their ability to make choices, and that they negotiate ways in which they can select options for play in digital spaces. CONCLUSIONS: Findings indicate that children are agentic individuals who are capable of making decisions in their play in digital spaces. This knowledge provides implications for Occupational Therapists to enhance play as an occupation in digital spaces.


Assuntos
Ocupações , Instituições Acadêmicas , Humanos , Criança , Pesquisa Qualitativa , Grupos Focais , Tomada de Decisões
4.
Stud Health Technol Inform ; 306: 241-248, 2023 Aug 23.
Artigo em Inglês | MEDLINE | ID: mdl-37638921

RESUMO

As the numbers of people with disabilities actively using technology to support their day-to-day activities increases the benefits afforded by these technologies are ever more evident. Much of the technology used by people with disabilities is often characterised as Assistive Technology (AT) which is designed and developed to address the specific needs of people with disabilities. In contrast to AT which is focused on serving the needs of people with disabilities, consumer digital technology refers to those technologies that are developed for use by the general public. The aim of this study was to explore the assistive potential of a range of exemplar consumer digital technology, namely, digital voice assistants and internet of things. A qualitative study was conducted in the context of a field-trial of a range of digital consumer technologies which included a Digital Voice Assistant alongside voice-operated Internet of Things technologies.


Assuntos
Pessoas com Deficiência , Tecnologia Assistiva , Humanos , Tecnologia , Internet , Pesquisa Qualitativa
5.
Am J Occup Ther ; 77(1)2023 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-36706276

RESUMO

IMPORTANCE: Internationally, it is suggested that school-based occupational therapy (SBOT) has an important role in supporting inclusion in educational settings. In SBOT, multitiered service delivery models are identified as a way forward to maximize school inclusion. Therefore, identifying evidence for the implementation of tiered interventions in SBOT is vital. OBJECTIVE: To identify and map evidence in the occupational therapy literature relating to SBOT interventions delivered in elementary schools for all children, for those at risk, and for those with identified diagnoses. DATA SOURCES: Peer-reviewed literature published in 14 occupational therapy journals between 1990 and 2020, indexed in the EBSCOhost database. STUDY SELECTION AND DATA COLLECTION: Included studies were those within the scope of SBOT that reported on school occupations and focused on elementary school-age children (excluding kindergarteners or preschoolers). FINDINGS: Forty studies met the criteria. Individual-tier intervention studies (n = 22) primarily reported direct interventions with children at risk or with identified diagnoses (Tier 2 or Tier 3), focusing mostly on remedial approaches. None adopted a whole-school approach. Despite handwriting and self-regulation being dominant areas of concern, these studies were not explicitly related to inclusion outcomes. Evidence for implementing multitiered models primarily used indirect, collaborative consultation, embedded in the school context (n = 18). These studies identified positive school staff and child outcomes when collaboration was timely, consistent, and authentic. CONCLUSIONS AND RELEVANCE: More rigorous individual-tier intervention studies are required to inform the design and implementation of multitiered interventions in SBOT and to support participation and inclusion in schools. What This Article Adds: This scoping review provides evidence to support occupational therapists' professional reasoning in developing evidence-based, contextual, educationally relevant multitiered models of intervention in SBOT.


Assuntos
Terapia Ocupacional , Criança , Humanos , Instituições Acadêmicas , Ocupações , Terapeutas Ocupacionais
6.
Disabil Rehabil Assist Technol ; 18(8): 1453-1465, 2023 11.
Artigo em Inglês | MEDLINE | ID: mdl-35138989

RESUMO

PURPOSE: Public playgrounds afford children and families important opportunities for outdoor play, social participation, and inclusion. Unfortunately, many children and families experience barriers to accessing, using, and being included in public playgrounds. Consequently, Universal Design (UD) is promoted for providing conceptual guidance for designing for inclusion in public playgrounds. However, a lack of research evidence means researchers have engaged in the ongoing interpretation of the UD concept and related non-discriminatory planning and design concepts. Therefore, the aim of this study was to examine how UD, and related concepts, are used in peer-reviewed articles concerning public playgrounds. MATERIALS AND METHODS: A scoping review was conducted in November 2019, which identified 15 peer-reviewed articles that met the inclusion criteria. RESULTS: Analysis revealed that the terms UD, inclusive design, accessibility, and usability are all being used to describe non-discriminatory planning and design concepts arbitrarily and without regard for higher or lower order concepts. Two broad interpretations were evident: (a) UD is synonymous with accessibility for some, and (b) UD is a higher-order concept that goes beyond accessibility for others. Nevertheless, findings highlight the utility of UD in underpinning the design of public playgrounds in many developed countries; however, the concept requires further clarity and specificity as it pertains to playground design and more pertinently inclusion in outdoor play. CONCLUSIONS: We argue for further conceptual refinement to consolidate the importance and future application of UD for Play (UDP) in the design of public playgrounds that promote outdoor play, social participation, and inclusion.IMPLICATIONS FOR REHABILITATIONMost peer-reviewed journal articles reviewed fail to define what is meant by the term Universal Design.Of those that do provide a definition, the outcome of inclusion in play, or the application of Universal Design to enable play in public playgrounds was unclear.Research to date has mostly focused on related concepts, including accessibility and usability, with less emphasis on Universal Design.Recommend a tailored perspective of Universal Design for Play (UDP).


Assuntos
Acessibilidade Arquitetônica , Desenho Universal , Criança , Humanos , Parques Recreativos , Difosfato de Uridina
7.
PLoS One ; 17(8): e0272630, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35944033

RESUMO

The United Nations Convention on the Rights of the Child has substantiated play for play's sake, thus focusing on the doing or being of play rather than any potentially desired outcomes. Examining this type of play from the perspective of the child acknowledges children as meaning-makers. A scoping review was conducted to expose and map the extent of the evidence available in the emerging and diverse field of children's experiences of play in digital spaces. Specifically, the literature was examined with regards to relevance to children's everyday lives, the personal and ecological relevance, and the methods used. A systematic search of the literature over the past fifteen years found thirty-one articles appropriate for inclusion. The analysis of the literature revealed that the articles formed four categories of how play in digital spaces was approached: 'Videogames, behaviours, and societal norms', 'Videogames for its own sake', 'Videogames for learning', and 'Active Videogames for health promotion'. This scoping review has identified a lack of articles focusing on children's experiences of play in a digital space, and these perspectives are essential for parents, professionals, game designers, and policymakers alike to contribute to an enhanced understanding of the role of play in digital spaces.


Assuntos
Promoção da Saúde , Pais , Criança , Humanos
8.
Disabil Rehabil ; 44(13): 3304-3325, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-33300821

RESUMO

PURPOSE: To synthesize evidence regarding the physical design features and non-physical aspects of public playgrounds that facilitate/hinder outdoor play, social participation, and inclusion; identify design recommendations; and explore the current discourses and concepts around designing for outdoor play, social participation, and inclusion in public playgrounds in the context of Universal Design (UD). METHODS: Published studies addressing public playgrounds, inclusion, and design, were identified via a systematic search of eleven databases from health, science, education, and humanities. RESULTS: Fifteen documents met the inclusion criteria. Three main themes were identified concerning physical design features and non-physical aspects of public playgrounds that facilitate/hinder outdoor play, social participation, and inclusion, with associated design recommendations. Although UD is recognized to have the potential to support the design of public playgrounds, no studies examined UD solutions for playgrounds or tested them for effectiveness. CONCLUSION: We cannot yet determine whether UD can support outdoor play, social participation, and inclusion in public playgrounds. Research to date has mostly focused on understanding users' perspectives; future research should continue to be informed by diverse users' perspectives to address gaps in knowledge concerning children's voice from migrants, lower socioeconomic communities, and intergenerational users with disabilities alongside researching design solutions for play.Implications for rehabilitationChildren, particularly children with disabilities and their families, continue to experience marginalization and exclusion in public playgrounds, despite a commitment to inclusion in international treaties.Universal design is recognized to have the potential to support the design of public playgrounds, however, the evidence is currently very sparse.While accessibility is an important consideration for playground design, it does not ensure that play occupations can take place.Extending knowledge on universal design as it applies explicitly to playgrounds and play occupation requires multi- and trans-disciplinary collaboration that includes a play-centered perspective.


Assuntos
Pessoas com Deficiência , Participação Social , Criança , Humanos , Parques Recreativos , Jogos e Brinquedos , Desenho Universal
9.
PLoS One ; 16(12): e0260975, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34914778

RESUMO

BACKGROUND: According to Article 12 of the United Nations Convention on the Rights of the Child, therapists are duty-bound to include children in decisions that impact them. Although occupational therapists champion client-centred, collaborative practice, there remains a paucity of studies detailing children's rights and experiences of decision-making in pediatric occupational therapy. PURPOSE: This qualitative study described the decision-making experiences of children, parents and therapists in occupational therapy. METHODS: Semi-structured interviews were conducted with 17 participants (six children, five parents and six occupational therapists), and data analysed using thematic analysis. FINDINGS: Three themes emerged: 1) Goal-setting experiences; 2) Adults: child-rights gatekeepers or defenders? and 3) Decision-making in context. Findings suggest that decision-making is mostly adult directed, and children's voices are subsumed by adult-led services, priorities, and agendas. IMPLICATIONS: Children's rights need to be embedded as an aspect of best practice in providing services that are child-centred in occupational therapy practices and education.


Assuntos
Tomada de Decisões , Terapeutas Ocupacionais/psicologia , Terapia Ocupacional/legislação & jurisprudência , Terapia Ocupacional/métodos , Pais/psicologia , Participação do Paciente/psicologia , Assistência Centrada no Paciente , Adulto , Criança , Feminino , Humanos , Masculino , Relações Profissional-Paciente , Pesquisa Qualitativa
10.
Stud Health Technol Inform ; 242: 241-248, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28873805

RESUMO

This paper describes the application of collaboration scripts to guide social interaction behaviours of children with intellectual disabilities. The use of such scripts demonstrate potential as a means of creating CSCL environments that can be used to provide children with communication and social interaction impairments with a platform for learning and practicing such skills in a meaningful social context.


Assuntos
Instrução por Computador , Comportamento Cooperativo , Deficiência Intelectual , Relações Interpessoais , Aprendizagem , Criança , Humanos
11.
Stud Health Technol Inform ; 242: 793-796, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28873887

RESUMO

MotorSense is a motion detection and tracking technology that can be implemented across a range of environments to assist in detecting delays in gross-motor skills development. The system utilises the motion tracking functionality of Microsoft's Kinect™. It features games that require children to perform graded gross-motor tasks matched with their chronological and developmental ages. This paper describes the rationale for MotorSense, provides an overview of the functionality of the system and illustrates sample activities.


Assuntos
Movimento (Física) , Destreza Motora , Tecnologia Assistiva , Humanos , Monitorização Ambulatorial
12.
BMC Plant Biol ; 13: 116, 2013 Aug 12.
Artigo em Inglês | MEDLINE | ID: mdl-23937238

RESUMO

BACKGROUND: Among the many commercial opportunities afforded by somatic embryogenesis (SE), it is the ability to clonally propagate individual plants with rare or elite traits that has some of the most significant implications. This is particularly true for many long-lived species, such as conifers, but whose long generation times pose substantive challenges, including increased recalcitrance for SE as plants age. Identification of a clonal line of somatic embryo-derived trees whose shoot primordia have remained responsive to SE induction for over a decade, provided a unique opportunity to examine the molecular aspects underpinning SE within shoot tissues of adult white spruce trees. RESULTS: Microarray analysis was used to conduct transcriptome-wide expression profiling of shoot explants taken from this responsive genotype following one week of SE induction, which when compared with that of a nonresponsive genotype, led to the identification of four of the most differentially expressed genes within each genotype. Using absolute qPCR to expand the analysis to three weeks of induction revealed that differential expression of all eight candidate genes was maintained to the end of the induction treatment, albeit to differing degrees. Most striking was that both the magnitude and duration of candidate gene expression within the nonresponsive genotype was indicative of an intense physiological response. Examining their putative identities further revealed that all four encoded for proteins with similarity to angiosperm proteins known to play prominent roles in biotic defense, and that their high-level induction over an extended period is consistent with activation of a biotic defense response. In contrast, the more temperate response within the responsive genotype, including induction of a conifer-specific dehydrin, is more consistent with elicitation of an adaptive stress response. CONCLUSIONS: While additional evidence is required to definitively establish an association between SE responsiveness and a specific physiological response, these results suggest that biotic defense activation may be antagonistic, likely related to the massive transcriptional and metabolic reprogramming that it elicits. A major issue for future work will be to determine how and if suppressing biotic defense activation could be used to promote a physiological state more conducive to SE induction.


Assuntos
Regulação da Expressão Gênica no Desenvolvimento , Picea/embriologia , Picea/fisiologia , Sequência de Aminoácidos , Regulação da Expressão Gênica de Plantas , Dados de Sequência Molecular , Picea/química , Picea/genética , Proteínas de Plantas/química , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Brotos de Planta/embriologia , Brotos de Planta/genética , Brotos de Planta/metabolismo , Alinhamento de Sequência
13.
Acta Crystallogr Sect E Struct Rep Online ; 65(Pt 6): o1218, 2009 May 07.
Artigo em Inglês | MEDLINE | ID: mdl-21583087

RESUMO

In the crystal of the title mol-ecular salt (systematic name: 2-acetyl-pyridinium 2,5-dibromo-4-hydr-oxy-3,6-dioxocyclo-hexa-1,4-dienolate), C(7)H(8)NO(+)·C(6)HBr(2)O(4) (-), centrosymmetric rings consisting of two cations and two anions are formed, with the components linked by alternating O-H⋯O and N-H⋯O hydrogen bonds. Short O⋯Br contacts [3.243 (2) and 3.359 (2) Å] may help to consolidate the packing.

14.
Genomics ; 88(4): 513-20, 2006 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-16890402

RESUMO

We have discovered a family of small secreted proteins in Homo sapiens and Mus musculus. The IGF-like (IGFL) genes encode proteins of approximately 100 amino acids that contain 11 conserved cysteine residues at fixed positions, including two CC motifs. In H. sapiens, the family is composed of four genes and two pseudogenes that are referred as IGFL1 to IGFL4 and IGFL1P1 and IGFL1P2, respectively. Human IGFL genes are clustered together on chromosome 19 within a 35-kb interval. M. musculus has a single IGFL family member that is located on chromosome 7. Further, evolutionary analysis shows a lack of direct orthology between any of the four human members and the mouse gene. This relationship between the mouse and the human family members suggests that the multiple members in the human complement have arisen from recent duplication events that appear limited to the primate lineage. Structural considerations and sequence comparisons would suggest that IGFL proteins are distantly related to the IGF superfamily of growth factors. IGFL mRNAs display specific expression patterns; they are expressed in fetal tissues, breast, and prostate, and in many cancers as well, and this pattern is consistent with that of the IGF family members.


Assuntos
Regulação da Expressão Gênica , Família Multigênica , Somatomedinas/genética , Somatomedinas/metabolismo , Sequência de Aminoácidos , Animais , Cromossomos Humanos Par 19 , Sequência Conservada , Cisteína , Evolução Molecular , Éxons , Feminino , Humanos , Masculino , Camundongos , Dados de Sequência Molecular , Pseudogenes , Homologia de Sequência de Aminoácidos , Somatomedinas/química
15.
Science ; 309(5738): 1256-9, 2005 Aug 19.
Artigo em Inglês | MEDLINE | ID: mdl-16109882

RESUMO

Several described growth factors influence the proliferation and regeneration of the intestinal epithelium. Using a transgenic mouse model, we identified a human gene, R-spondin1, with potent and specific proliferative effects on intestinal crypt cells. Human R-spondin1 (hRSpo1) is a thrombospondin domain-containing protein expressed in enteroendocrine cells as well as in epithelial cells in various tissues. Upon injection into mice, the protein induced rapid onset of crypt cell proliferation involving beta-catenin stabilization, possibly by a process that is distinct from the canonical Wnt-mediated signaling pathway. The protein also displayed efficacy in a model of chemotherapy-induced intestinal mucositis and may have therapeutic application in gastrointestinal diseases.


Assuntos
Proliferação de Células , Mucosa Intestinal/citologia , Mitógenos , Trombospondinas/fisiologia , Animais , Antineoplásicos/efeitos adversos , Linhagem Celular , Linhagem Celular Tumoral , Quimera , Colo/citologia , Colo/patologia , Proteínas do Citoesqueleto/metabolismo , Relação Dose-Resposta a Droga , Células Enteroendócrinas/metabolismo , Células Epiteliais/metabolismo , Fator 7 de Crescimento de Fibroblastos , Fatores de Crescimento de Fibroblastos/farmacologia , Fluoruracila/efeitos adversos , Peptídeos Semelhantes ao Glucagon , Humanos , Mucosa Intestinal/metabolismo , Mucosa Intestinal/patologia , Intestino Delgado/citologia , Intestino Delgado/patologia , Camundongos , Camundongos Transgênicos , Transplante de Neoplasias , Neoplasias Experimentais/tratamento farmacológico , Neoplasias Experimentais/patologia , Peptídeos/farmacologia , Proteínas/farmacologia , Proteínas Recombinantes/farmacologia , Trombospondinas/genética , Trombospondinas/metabolismo , Trombospondinas/farmacologia , Língua/efeitos dos fármacos , Língua/patologia , Transativadores/metabolismo , Proteínas Wnt , Proteína Wnt3 , beta Catenina
16.
J Mol Evol ; 61(3): 372-80, 2005 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-16044242

RESUMO

An emerging series of papers has identified new receptor proteins that predict seven-transmembrane pass topologies. We have consolidated this family to 11 human genes and have named the family PAQR, after two of the initially described ligands (progestin and adipoQ receptors). This protein family has ancient evolutionary roots, with identified homologs found in eubacteria. To date, published data indicate that the prokaryotic members of this family appear to encode hemolysin-type proteins, while in eukaryotes, PAQR proteins encode functional receptors with a broad range of apparent ligand specificities. We provide the complete human and mouse complement of this family, suggest a conserved structure/topology with invariant intracellular amino acid residues, and have measured mRNA expression levels for these genes across a range of human tissues.


Assuntos
Membrana Celular/metabolismo , Receptores de Superfície Celular/química , Receptores de Superfície Celular/classificação , Sequência de Aminoácidos , Animais , Evolução Molecular , Humanos , Camundongos , Dados de Sequência Molecular , Filogenia , RNA Mensageiro/análise , RNA Mensageiro/genética , Receptores de Superfície Celular/genética , Receptores de Superfície Celular/metabolismo , Alinhamento de Sequência , Homologia de Sequência de Aminoácidos
17.
Genomics ; 86(1): 100-11, 2005 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-15953544

RESUMO

The C-terminal domains of the A, B, C chains of C1q subcomponent of C1 complex represent a common structural motif, the C1q domain, that is found in a diverse range of proteins. We analyzed the human genome for the complete complement of this family and have identified a total of 31 independent gene sequences. The predominant organization of C1q-domain-containing (C1qDC) proteins includes a leading signal peptide, a collagen-like region of variable length, and a C-terminal C1q domain. There are 15 highly conserved residues within the C1q domain, among which 8 are invariant within the human gene set and these are predicted to cluster within the hydrophobic core of the protein. We suggest a 3-subfamily classification based on sequence homology. For some C1qDC-encoding genes, strict orthology has been retained throughout vertebrate evolution and these examples suggest a highly specific functional role for C1qDC proteins that has been under significant selective pressure. Alternatively, individual species have co-opted C1qDC proteins for roles that are highly specific to their biology, suggesting an evolutionary strategy of gene duplication and functional diversification. A more extensive analysis of the evolutionary relationship of C1qDC proteins reveals an ancient rooting, with clear members found in eubacterial species. Curiously, we have been unable to identify C1qDC-encoding genes in many eukaryotic genomcs, such as Sacchromyces cerivisae and C. elegans, suggesting that the retention or loss of this gene family throughout evolution has been sporadic.


Assuntos
Complemento C1q/genética , Genoma Humano , Sequência de Aminoácidos , Animais , Complemento C1q/química , Bases de Dados de Proteínas , Evolução Molecular , Variação Genética , Humanos , Modelos Moleculares , Dados de Sequência Molecular , Filogenia , Conformação Proteica , Alinhamento de Sequência , Homologia de Sequência de Aminoácidos
18.
Biochem Biophys Res Commun ; 315(2): 272-80, 2004 Mar 05.
Artigo em Inglês | MEDLINE | ID: mdl-14766204

RESUMO

Drosophila Crossveinless-2 (dCV-2) is required for local activation of Mad phosphorylation in the fruit fly wing and has been postulated to be a positive regulator of BMP-mediated signaling. In contrast, the presence of 5 Chordin-like cysteine-rich domains in the CV-2 protein suggests that CV-2 belongs to a family of well-established inhibitors of BMP function that includes Chordin and Sog [Development 127 (2000) 3947]. We have identified a human homolog of Drosophila CV-2 (hCV-2). Here we show that purified recombinant hCV-2 protein inhibits BMP-2 and BMP-4 dependent osteogenic differentiation of W-20-17 cells, as well as BMP dependent chondrogenic differentiation of ATDC5 cells. Interestingly, hCV-2 messenger RNA is expressed at high levels in human primary chondrocytes, whereas expression in primary human osteoblasts is low. These results suggest that hCV-2 may regulate BMP responsiveness of osteoblasts and chondrocytes in vivo. Taken together we have shown that contrary to the function predicted from the fruit fly, Crossveinless-2 is a novel inhibitor of BMP function.


Assuntos
Proteínas Morfogenéticas Ósseas/antagonistas & inibidores , Proteínas de Drosophila/fisiologia , Fator de Crescimento Transformador beta , Fosfatase Alcalina/metabolismo , Animais , Proteína Morfogenética Óssea 2 , Proteína Morfogenética Óssea 4 , Proteínas Morfogenéticas Ósseas/metabolismo , Diferenciação Celular , Divisão Celular , Linhagem Celular , Células Cultivadas , Cisteína/química , DNA Complementar/metabolismo , Relação Dose-Resposta a Droga , Drosophila , Proteínas de Drosophila/metabolismo , Glicoproteínas/química , Humanos , Peptídeos e Proteínas de Sinalização Intercelular/química , Camundongos , Osteoblastos/metabolismo , Fenótipo , Fosforilação , Estrutura Terciária de Proteína , RNA Mensageiro/metabolismo , Proteínas Recombinantes/química , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Transdução de Sinais , Distribuição Tecidual
19.
Immunogenetics ; 54(5): 293-300, 2002 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-12185532

RESUMO

We have identified three novel, rarely expressed human genes that encode new members of the lipid transfer/lipopolysaccharide binding protein (LT/LBP) gene family based on sequence homology. BPI and other members of the LT/LBP family are structurally related proteins capable of binding phospholipids and lipopolysaccharides. Real-time PCR studies indicate that BPIL1 and BPIL3 are highly expressed in hypertrophic tonsils. In situ hybridization analysis of BPIL2 shows prominent expression in skin specimens from psoriasis patients. BPIL1 and BPIL3 map to Chromosome 20q11; thus, these novel genes form a cluster with BPI and two other members of the LT/LBP gene family on the long arm of human Chr 20. BPIL2maps to Chr 22q13. The exon/intron organization of all three genes is highly conserved with that of BPI, suggesting evolution from a common ancestor.


Assuntos
Proteínas de Transporte/genética , Cromossomos Humanos Par 20/genética , Cromossomos Humanos Par 22/genética , Família Multigênica , Sequência de Aminoácidos , Proteínas de Transporte/biossíntese , Proteínas de Transporte/química , Proteínas de Transporte/fisiologia , Mapeamento Cromossômico , Clonagem Molecular , Sistemas Computacionais , DNA Complementar/genética , Evolução Molecular , Perfilação da Expressão Gênica , Humanos , Modelos Moleculares , Dados de Sequência Molecular , Especificidade de Órgãos , Reação em Cadeia da Polimerase/métodos , Conformação Proteica
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