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1.
J Learn Disabil ; : 222194241275636, 2024 Sep 18.
Artigo em Inglês | MEDLINE | ID: mdl-39291845

RESUMO

The purpose of this logistic regression study was to identify predictors of teacher-reported sustained use of data-based instruction (DBI) during the COVID-19 pandemic and assess the extent to which the identified predictors explained teachers' sustained use after completing programmatic support for intensive early writing instruction. We surveyed 58 teachers who participated in a professional development efficacy trial regarding their sustained use of DBI in writing. The model indicated a higher predicted probability of sustaining DBI for teachers who received the full treatment (tools, learning modules, and coaching for 20 weeks of intervention during their year of participation in the efficacy trial) compared to teachers in the control group who only received tools and learning modules at the end of their participation year. In addition, teachers who taught in-person were more likely to sustain compared to those who taught in remote or hybrid models, controlling for other variables. Furthermore, as the number of facilitators that teachers reported increased, teachers were more likely to sustain their use of DBI components, controlling for other variables. Further research could shed light on the relative impact of different types of facilitators and different levels of support.

2.
J Exp Child Psychol ; 243: 105925, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38608513

RESUMO

In the current study, we investigated the role of executive functions in explaining how word recognition and language comprehension jointly predict reading comprehension in multilingual and monolingual students (Grades 1 and 2). Specifically, mediation and moderation models were tested and compared to offer a more nuanced understanding of the role of executive functions in reading comprehension. The results provided support for the mediation model in which executive functions indirectly contribute to reading comprehension via word recognition and language comprehension in both language groups. In addition, executive functions directly predicted reading comprehension (i.e., partial mediation). These findings suggest that executive functions serve as general cognitive processes that support word recognition, language comprehension, and reading comprehension (i.e., direct contribution) as well as facilitate connecting word recognition and language comprehension in support for reading comprehension (i.e., indirect contribution). These findings are consistent with prominent models of reading comprehension.


Assuntos
Compreensão , Função Executiva , Multilinguismo , Leitura , Humanos , Compreensão/fisiologia , Função Executiva/fisiologia , Feminino , Masculino , Criança , Idioma
3.
Lang Speech Hear Serv Sch ; 55(2): 529-544, 2024 04 11.
Artigo em Inglês | MEDLINE | ID: mdl-38284915

RESUMO

PURPOSE: Picture-word writing curriculum-based measures (PW CBM-Ws) are technically sound, formative measures of descriptive, sentence-level writing but cannot estimate underlying linguistic skills. The purpose of this exploratory alternative scoring investigation was to apply metrics from language sample analysis (LSA) to PW CBM-Ws as a complementary measure of underlying language skills in beginning writers' sentence-level writing. METHOD: LSA metrics were applied to 104 typically developing first through third graders' PW CBM-W samples across fall and spring semesters. Factorial analyses of variance with post hoc Bonferroni pairwise comparisons were applied after obtaining alternate-form reliability and criterion-related validity estimates. RESULTS: Analyses revealed reliable discrimination between grades and significant growth between fall and spring semesters for three LSA metrics: mean length of T-unit in words, mean length of T-unit in morphemes, and number of different words. While mean length of T-unit in words and morphemes demonstrated evidence of discrimination and growth in first grade only, number of different words showed evidence of reliable discrimination and growth in first and third grades. CONCLUSIONS: Mean length of T-unit in words, mean length of T-unit in morphemes, and number of different words showed evidence of adequate criterion-related validity, discrimination among grades, and sensitivity to growth when calculated using PW CBM-W samples to gauge underlying linguistic skills in first- and third-grade students. Implications and future directions for research are discussed. SUPPLEMENTAL MATERIAL: https://doi.org/10.23641/asha.25050290.


Assuntos
Idioma , Projetos de Pesquisa , Humanos , Reprodutibilidade dos Testes , Linguística , Currículo , Redação
4.
Read Res Q ; 58(2): 313-332, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37416303

RESUMO

The purpose of this paper is to describe what we know and what we still need to learn about literacy intervention for children who experience significant difficulties learning to read. We reviewed 14 meta-analyses and systematic reviews of experimental and quasi-experimental studies published in the last decade that examined the effects of reading and writing interventions in the elementary grades, including research focused on students with reading difficulties and disabilities, including dyslexia. We attended to moderator analyses, when available, to further refine what we know and need to learn about interventions. Findings from these reviews indicate that explicit and systematic intervention focusing on the code and meaning dimensions of reading and writing, and delivered one-to-one or in small groups, are likely to improve foundational code-based reading skills, and to a lesser extent, meaning-based skills, across elementary grade levels. Findings, at least in the upper elementary grades, indicate that some intervention features including standardized protocols, multiple components, and longer duration can yield stronger effects. And, integrating reading and writing interventions shows promise. We still need to learn more about specific instructional routines and components that provide more robust effects on students' ability to comprehend and individual differences in response to interventions. We discuss limitations of this review of reviews and suggest directions for future research to optimize implementation, particularly to understand for whom and under what conditions literacy interventions work best.

5.
J Learn Disabil ; : 222194231182974, 2023 Jun 27.
Artigo em Inglês | MEDLINE | ID: mdl-37366054

RESUMO

We examined the efficacy of a Technology-Based Early Language Comprehension Intervention (TeLCI) designed to teach inferencing in a non-reading context. First- and second graders identified as at risk of comprehension difficulties were assigned randomly to a business-as-usual control group or to use TeLCI over an 8-week period. TeLCI comprised three learning modules per week that involved (a) learning new vocabulary, (b) watching fiction or nonfiction videos, and (c) answering inferential questions. Students also engaged in small-group read-alouds with their teachers once per week. Students who experienced TeLCI improved their inferencing and benefited from scaffolding and feedback provided during the intervention. Students' pre- to posttest inferencing gains were comparable with those of control students. Female students and those receiving special education services appeared less likely to benefit from TeLCI, whereas multilingual students were more likely to respond. Further work is needed to determine the optimal conditions under which TeLCI will benefit young children.

6.
J Learn Disabil ; 56(6): 440-452, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36935614

RESUMO

Teacher-level factors are theoretically linked to student outcomes in data-based instruction (DBI; Lembke et al., 2018). Professional development and ongoing support can increase teachers' knowledge, skills, and beliefs related to DBI, as well as their instructional fidelity (McMaster et al., 2020). However, less is known about how each of these teacher-level factors influences student progress during an intervention. The purpose of this study was to examine the association between several important teacher-level factors-teachers' writing instruction fidelity, knowledge and skills related to DBI, explicit writing orientation, and writing instruction self-efficacy-and students' writing growth. Participants were 49 U.S. elementary teachers and their 118 students struggling with early writing skills. Using hierarchical linear modeling, we found a significant positive relation between DBI knowledge and skills and student writing growth, but no relation was found between writing instruction fidelity, writing orientation, or self-efficacy and student writing growth. Implications for writing instruction fidelity measurement in DBI and professional development related to teachers' DBI knowledge and skills are discussed.


Assuntos
Professores Escolares , Capacitação de Professores , Humanos , Estudantes , Redação
7.
Read Writ ; 36(2): 467-490, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36597413

RESUMO

The purpose of this study is to evaluate the role of the Early Language Comprehension Individualized Instruction (ELCII) program in supporting kindergarteners' learning of inference-making during the COVID-19 pandemic. Two different cohorts of pre- and in-pandemic students completed the ELCII program, which was designed to teach them how to make inferences. Results suggest that kindergarteners during COVID-19 made slower growth over the course of the intervention compared to their counterparts who completed the intervention before the pandemic. However, when growth rates between the two cohorts were compared accounting for the scaffolding and feedback provided by the ELCII program, the growth rates were similar. These findings suggest that the individualized scaffolding and feedback component of ELCII may have supported kindergarteners' learning of inference-making during the pandemic.

8.
J Clin Med ; 10(21)2021 Oct 29.
Artigo em Inglês | MEDLINE | ID: mdl-34768583

RESUMO

Preeclampsia (PE) is characterized by new onset hypertension during pregnancy and is associated with oxidative stress, placental ischemia, and autoantibodies to the angiotensin II type I receptor (AT1-AA). Mitochondrial (mt) dysfunction in PE and various sources of oxidative stress, such as monocytes, neutrophils, and CD4 + T cells, have been identified as important players in the pathophysiology of PE. We have established the significance of AT1-AA, TNF-α, and CD4 + T cells in causing mitochondrial (mt) dysfunction in renal and placental tissues in pregnant rats. Although the role of mt dysfunction from freshly isolated intact placental mitochondria has been compared in human PE and normally pregnant (NP) controls, variations among preterm PE or term PE have not been compared and mechanisms contributing to mt ROS during PE are unclear. Therefore, we hypothesized PE placentas would exhibit impaired placental mt function, which would be worse in preterm PE patients than in those of later gestational ages. Immediately after delivery, PE and NP patient's placentas were collected, mt were isolated and mt respiration and ROS were measured. PE patients at either < or >34 weeks gestational age (GA) exhibited elevated blood pressure and decreased placental mt respiration rates (state 3 and maximal). Patients delivering at >34 weeks exhibited decreased Complex IV activity and expression. Placental mtROS was significantly reduced in both PE groups, compared to NP placental mitochondria. Collectively, the study demonstrates that PE mt dysfunction occurs in the placenta, with mtROS being lower than that seen in NP controls. These data indicate why antioxidants, as a potential target or new therapeutic agent, may not be ideal in treating the oxidative stress associated with PE.

9.
Am J Obstet Gynecol MFM ; 3(1): 100275, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-33451592

RESUMO

BACKGROUND: Preeclampsia is characterized by a new onset of hypertension during pregnancy and is associated with autoantibodies against the angiotensin II type 1 receptor and oxidative stress. There is growing evidence for mitochondrial dysfunction in preeclampsia, however, the culprits for mitochondrial dysfunction are still being defined. We previously demonstrated that angiotensin II type 1 autoantibodies cause renal, placental, and endothelial mitochondrial dysfunction in pregnant rats. However, the role of the angiotensin II type 1 autoantibodies in endothelial mitochondrial function in response to sera from preeclamptics is unknown. Thus, we hypothesized that circulating factors, such as the angiotensin II type 1 autoantibodies, during preeclampsia would negatively impact the vascular endothelial mitochondrial function in human umbilical vein endothelial cells. OBJECTIVE: The objective of the study was to determine a role for circulating angiotensin II type 1 autoantibodies to cause endothelial mitochondrial reactive oxygen species and dysfunction in preeclampsia compared to normal pregnant controls. STUDY DESIGN: Immediately after delivery, sera was collected from preeclamptic patients and normal pregnant controls. The mitochondrial reactive oxygen species were determined from the cells treated overnight with 10% sera from either the control or preeclamptic patients with and without the antiotension II type 1 autoantibodies inhibitor peptide ('n7AAc'). RESULTS: Preeclampsia patients at <34 weeks' gestation exhibited an elevated mean arterial blood pressure. Cells treated with serum from the preeclampsia patients at <34 weeks gestational age showed significantly (P<0.05) greater mitochondrial oxidative stress and reduced respiration than cells treated with the control sera, and these abnormalities were restored with 'n7AAc'. CONCLUSION: This study demonstrates that endothelial mitochondrial dysfunction occurs in response to circulating factors, especially in response to serum from preterm preeclampsia patients, and can be restored by blocking circulating angiotensin II type 1 autoantibodies, thereby indicating a potential new therapeutic target for preeclampsia.


Assuntos
Pré-Eclâmpsia , Animais , Autoanticorpos/metabolismo , Feminino , Humanos , Estresse Oxidativo , Placenta/metabolismo , Pré-Eclâmpsia/metabolismo , Gravidez , Ratos , Ratos Sprague-Dawley
10.
J Deaf Stud Deaf Educ ; 25(4): 398-410, 2020 09 10.
Artigo em Inglês | MEDLINE | ID: mdl-32696962

RESUMO

This review systematically identified and compared the technical adequacy (reliability and validity evidence) of reading curriculum-based measurement (CBM) tasks administered to students who are deaf and hard of hearing (DHH). This review included all available literature written in English. The nine studies identified used four CBM tasks: signed reading fluency, silent reading fluency, cloze (write in missing words given blank lines within a passage), and maze (circle the target word given multiple choice options within a passage). Data obtained from these measures were generally found to be internally consistent and stable with validity evidence varying across measures. Emerging evidence supports the utility of CBM for students who are DHH. Further empirical evidence is needed to continue to explore technical properties, identify if student scores are sensitive to growth over short periods of time, and examine whether CBM data can be used to inform instructional decision-making to improve student outcomes.


Assuntos
Currículo , Educação de Pessoas com Deficiência Auditiva/normas , Avaliação Educacional/métodos , Currículo/normas , Avaliação Educacional/normas , Humanos , Pessoas com Deficiência Auditiva/psicologia
11.
J Deaf Stud Deaf Educ ; 25(3): 318-333, 2020 05 30.
Artigo em Inglês | MEDLINE | ID: mdl-32391549

RESUMO

This study compared the reliability and validity of student scores from paper-pencil and e-based assessments using the "maze" and "silent reading fluency" (SRF) tasks. Forty students who were deaf and hard of hearing and reading between the second and fifth grade reading levels and their teachers (n = 21) participated. For maze, alternate form reliability coefficients obtained from correct scores and correct scores adjusted for guessing ranged from r = .61 to .84 (ps < .01); criterion-related validity coefficients ranged from r = .33 to .67 (most ps < .01). For SRF, reliability coefficients obtained from correct scores ranged from r = .50 to .75 (ps < .01); validity ranged from r = .25 to .72. Differences between student performance on paper-pencil and e-based conditions were generally non-significant for maze; significant differences between conditions for SRF favored the paper-pencil condition. Findings suggest that maze holds promise, with inconclusive results for SRF.


Assuntos
Currículo , Surdez/reabilitação , Educação de Pessoas com Deficiência Auditiva/métodos , Avaliação Educacional/métodos , Estudantes , Surdez/psicologia , Humanos , Reprodutibilidade dos Testes
12.
J Learn Disabil ; 53(4): 311-324, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32274958

RESUMO

Data from a small randomized control trial of teachers' use of Data-Based Instruction (DBI) for early writing were analyzed to determine the influence of teacher knowledge, skills, and treatment fidelity on student Curriculum-Based Measurement (CBM) slope. Participants included 11 elementary grade teachers who delivered intensive intervention in early writing and their students (n = 31), all identified as either at risk for or with disabilities that affect their writing. Teachers received professional development and ongoing coaching to support the implementation of DBI for improving their students' early writing skills. Results from a multiple regression analysis suggest that teacher knowledge and skills in DBI was strongly related to student CBM slope in early writing (p < .01) and a small but significant relation between fidelity of writing instruction and student CBM slope (p < .01). Implications for instructional coaching and improving student writing progress are discussed.


Assuntos
Currículo , Educação Inclusiva , Deficiências da Aprendizagem , Competência Profissional , Professores Escolares , Estudantes , Capacitação de Professores , Redação , Adulto , Criança , Educação Inclusiva/métodos , Feminino , Humanos , Deficiências da Aprendizagem/reabilitação , Masculino , Pessoa de Meia-Idade , Desenvolvimento de Pessoal
13.
J Behav Educ ; 29(2): 246-281, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37670908

RESUMO

Telehealth has been utilized to provide behavioral services to families with children with autism spectrum disorder (ASD) and other disabilities. This systematic review provides an update on current research pertaining to the use of telehealth to provide behavior analytic-based services and train caregivers in implementing behavioral procedures. This review also describes information on reported training components and caregivers' procedural fidelity. Empirical studies were collected from five databases. Overall, the studies provide evidence of the utility of telehealth as a service delivery model for providing behavior analytic-based services and for training caregivers to implement behavioral assessments and procedures. The authors discuss potential considerations for developing training packages and training caregivers via telehealth. Future research should use experimental methods to determine effective components for training individuals via telehealth to use behavioral procedures with good fidelity as well as to detect other factors that may influence procedural fidelity.

14.
Top Cogn Sci ; 12(1): 256-273, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31549797

RESUMO

We present an integrated theoretical framework guiding the use of visual narratives in educational settings. We focus specifically on the use of static and dynamic visual narratives to teach and assess inference skills in young children and discuss evidence to support the efficacy of this approach. In doing so, first we review the basis of the integrated framework, which builds on major findings of cognitive, developmental, and language research highlighting that (a) inference skills can be developed in non-reading contexts using different media, (b) inference skills can transfer across different media, and (c) inference skills can be improved using questioning that includes scaffolding and specific feedback. Second, we review instructional and assessment approaches that align with the proposed framework; these approaches are designed to teach or assess inference making skills using visual narratives and interactive questioning. In this context, we discuss how these approaches leverage the unique affordances of static and dynamic visual narratives with respect to unit of meaning (by increasing opportunities to generate inferences), multimodality (by providing opportunities to generate inferences of higher complexity than text), and vocabulary/knowledge demands (by providing vocabulary/knowledge support), while also reviewing evidence for their usability, feasibility, and efficacy to improve educational outcomes. We conclude with important theoretical and practical questions about future work in this area.


Assuntos
Recursos Audiovisuais , Desenvolvimento Infantil/fisiologia , Compreensão/fisiologia , Idioma , Aprendizagem/fisiologia , Narração , Reconhecimento Visual de Modelos/fisiologia , Pensamento/fisiologia , Criança , Humanos
15.
New Dir Child Adolesc Dev ; 2019(165): 137-144, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-31034121

RESUMO

In this commentary, I highlight key insights from research on learning disabilities (LD) reported in this special issue. Authors of each article describe innovative work that is expanding frontiers of LD knowledge, by focusing on vulnerable and understudied populations, using multiple methodologies and data sources, and building and refining theory. Insights that emerge from this work relate to defining and identifying LD; estimating prevalence rates of LD subgroups; and understanding the role of cognitive, language, genetic, and environmental factors and their implications for assessment and intervention. I conclude that findings of this work promise to have a significant and lasting impact on the lives of children and youth with LD.


Assuntos
Pesquisa Biomédica , Deficiências da Aprendizagem , Humanos , Deficiências da Aprendizagem/etiologia , Deficiências da Aprendizagem/genética , Deficiências da Aprendizagem/fisiopatologia , Deficiências da Aprendizagem/reabilitação
16.
J Sch Psychol ; 73: 131-149, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30961878

RESUMO

The purpose of this study was to examine the validity of two widely used Curriculum-Based Measures (CBM) in reading-oral reading and maze-in relation to reading comprehension on state tests using a meta-analysis. A total of 61 studies (132 correlations) were identified across Grades 1 to 10. A random-effects meta-analysis was conducted to estimate the average correlations between the two CBM tasks and reading comprehension on state tests, and to analyze the effects of potential moderating variables (characteristics of study, students, CBM, and state tests). Results revealed that the average correlation for oral reading was significantly larger than that for maze when all grade levels were included together in the analysis. When grade levels were separated, the difference between average correlations was only at the higher grades (Grades 4-10), favoring oral reading. In terms of correlations by grade level, oral reading and maze showed a similar pattern; that is, correlations were comparable across elementary grades, but decreased for secondary grades. In addition to the type of CBM and grade level differences, type of publication, type of state tests (commercial versus state-developed), and time interval between CBM and state tests were significant sources of variance in correlations. Implications for research and educational practice are discussed highlighting the somewhat different conclusions from previous literature, especially regarding the use of CBM for older students.


Assuntos
Sucesso Acadêmico , Compreensão , Currículo , Leitura , Instituições Acadêmicas , Estudantes , Adolescente , Criança , Humanos
17.
Pregnancy Hypertens ; 15: 72-77, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30825931

RESUMO

Women with preeclampsia (PE) have increased mean arterial pressure (MAP), natural killer (NK) cells, reactive oxygen species (ROS), and agonistic autoantibodies to the angiotensin II type 1 receptor (AT1-AA). AT1-AA's administered to pregnant rodents produces a well-accepted model of PE. However, the role of NK cells and mitochondrial reactive oxygen species (mtROS) in AT1-AA mediated hypertension during pregnancy is unknown. We hypothesize that AT1-AA induced model of PE will exhibit elevated MAP, NK cells, and mtROS; while inhibition of the AT1-AA binding to the AT1R would be preventative. Pregnant rats were divided into 4 groups: normal pregnant (NP) (n = 5), NP + AT1-AA inhibitory peptide (NP +'n7AAc') (n = 3), NP + AT1-AA infused (NP + AT1-AA) (n = 10), and NP + AT1-AA +'n7AAc' (n = 8). Day 13, rats were surgically implanted with mini-pumps infusing either AT1-AA or AT1-AA +'n7AAc'. Day 19, tissue and blood was collected. MAP was elevated in AT1-AA vs. NP (119 ±â€¯1 vs. 102 ±â€¯2 mmHg, p < 0.05) and this was prevented by 'n7AAc' (108 ±â€¯3). There was a 6 fold increase in renal activated NK cells in AT1-AA vs NP (1.2 ±â€¯0.4 vs. 0.2 ±â€¯0.1% Gated, p = 0.05) which returned to NP levels in AT1-AA +'n7AAc' (0.1 ±â€¯0.1% Gated). Renal mtROS (317 ±â€¯49 vs. 101 ±â€¯13% Fold, p < 0.05) was elevated with AT1-AA vs NP and was decreased in AT1-AA +'n7AAc' (128 ±â€¯16, p < 0.05). In conclusion, AT1-AA's increased MAP, NK cells, and mtROS which were attenuated by AT1-AA inhibition, thus highlighting new mechanisms of AT1-AA and the importance of drug therapy targeted to AT1-AAs in hypertensive pregnancies.


Assuntos
Bloqueadores do Receptor Tipo 1 de Angiotensina II/farmacologia , Rim/imunologia , Células Matadoras Naturais/imunologia , Mitocôndrias/metabolismo , Placenta/imunologia , Pré-Eclâmpsia/metabolismo , Animais , Autoanticorpos , Pressão Sanguínea/efeitos dos fármacos , Modelos Animais de Doenças , Feminino , Humanos , Rim/citologia , Estresse Oxidativo , Placenta/metabolismo , Pré-Eclâmpsia/induzido quimicamente , Pré-Eclâmpsia/tratamento farmacológico , Pré-Eclâmpsia/fisiopatologia , Gravidez , Ratos , Ratos Sprague-Dawley , Espécies Reativas de Oxigênio/metabolismo , Receptor Tipo 1 de Angiotensina/metabolismo
18.
Am J Physiol Regul Integr Comp Physiol ; 316(5): R441-R447, 2019 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-30811248

RESUMO

Preeclampsia (PE) is characterized by new-onset hypertension during pregnancy and is associated with immune activation and placental oxidative stress. Mitochondrial dysfunction is a major source of oxidative stress and may play a role in the pathology of PE. We (Vaka VR, et al. Hypertension 72: 703-711, 2018. doi: 10.1161/HYPERTENSIONAHA.118.11290 .) have previously shown that placental ischemia is associated with mitochondrial oxidative stress in the reduced uterine perfusion pressure (RUPP) model of PE. Furthermore, we have also shown that placental ischemia induces natural killer (NK) cell activation in RUPP. Thus, we hypothesize that NK cell depletion could improve mitochondrial function associated with hypertension in the RUPP rat model of PE. Pregnant Sprague-Dawley rats were divided into three groups: normal pregnant (NP), RUPP, and RUPP+NK cell depletion rats (RUPP+NKD). On gestational day (GD)14, RUPP surgery was performed, and NK cells were depleted by administering anti-asialo GM1 antibodies (3.5 µg/100 µl ip) on GD15 and GD17. On GD19, mean arterial pressure (MAP) was measured, and placental mitochondria were isolated and used for mitochondrial assays. MAP was elevated in RUPP versus NP rats (119 ± 1 vs.104 ± 2 mmHg, P = 0.0004) and was normalized in RUPP+NKD rats (107 ± 2 mmHg, P = 0.002). Reduced complex IV activity and state 3 respiration rate were improved in RUPP+NKD rats. Human umbilical vein endothelial cells treated with RUPP+NKD serum restored respiration with reduced mitochondrial reactive oxygen species (ROS). The restored placental or endothelial mitochondrial function along with attenuated endothelial cell mitochondrial ROS with NK cell depletion indicate an important role of NK cells in mediating mitochondrial oxidative stress in the pathology of PE.


Assuntos
Metabolismo Energético , Isquemia/metabolismo , Células Matadoras Naturais/metabolismo , Mitocôndrias/metabolismo , Estresse Oxidativo , Placenta/irrigação sanguínea , Pré-Eclâmpsia/metabolismo , Útero/irrigação sanguínea , Animais , Pressão Arterial , Respiração Celular , Células Cultivadas , Modelos Animais de Doenças , Feminino , Idade Gestacional , Células Endoteliais da Veia Umbilical Humana/imunologia , Células Endoteliais da Veia Umbilical Humana/metabolismo , Humanos , Isquemia/imunologia , Isquemia/fisiopatologia , Células Matadoras Naturais/imunologia , Pré-Eclâmpsia/imunologia , Pré-Eclâmpsia/fisiopatologia , Gravidez , Ratos Sprague-Dawley , Espécies Reativas de Oxigênio/metabolismo , Fluxo Sanguíneo Regional
19.
Hypertension ; 72(3): 703-711, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-30012871

RESUMO

Placental ischemia is believed to be the initial event in the development of preeclampsia. Mitochondrial dysfunction is a cause of reactive oxygen species (ROS) generation and oxidative stress, however, there are not many studies examining the role of mitochondrial ROS in the pathology of preeclampsia. The purpose of this study was to not only examine the effect of placental ischemia on mitochondrial-mediated oxidative stress in reduced uterine perfusion pressure (RUPP) rat model of preeclampsia but to also examine the role of mitochondrial ROS in contributing to hypertension in response to placental ischemia. Female pregnant Sprague Dawley rats were used in this study. On gestational day 14, RUPP surgery was performed. On gestational day 19, blood pressure (mean arterial pressure) was measured, placentas and kidneys were collected from normal pregnant and RUPP rats and processed for mitochondrial respiration, ROS, and oxidative phosphorylation enzyme activities. Renal and placental complex activities, expressions and respiration rates were significantly reduced and mitochondrial ROS was increased in RUPP versus normal pregnant mitochondria. Mean arterial pressure was elevated in RUPP (n=6) compared with normal pregnant rats (n=5; 126±4 versus 103±4 mm Hg; P<0.05) and treatment with mitochondrial-specific antioxidants (MitoQ/MitoTEMPO) significantly reduced mean arterial pressure in RUPPs (n=5-10). Mitochondrial ROS was significantly elevated in endothelial cells incubated with RUPP serum compared from with normal pregnant rats, whereas serum from mito antioxidant-treated RUPP rats attenuated this response. Impaired mitochondrial function and vascular, placental, and renal mitochondrial ROS play an important role in hypertension and reduced fetal weight in response to placental ischemia during pregnancy.


Assuntos
Modelos Animais de Doenças , Hipertensão/fisiopatologia , Mitocôndrias/metabolismo , Pré-Eclâmpsia/fisiopatologia , Espécies Reativas de Oxigênio/metabolismo , Útero/fisiopatologia , Animais , Pressão Sanguínea/fisiologia , Feminino , Humanos , Hipertensão/metabolismo , Isquemia/fisiopatologia , Rim/irrigação sanguínea , Rim/fisiopatologia , Placenta/irrigação sanguínea , Placenta/fisiopatologia , Pré-Eclâmpsia/metabolismo , Gravidez , Ratos Sprague-Dawley , Útero/irrigação sanguínea , Útero/metabolismo
20.
J Learn Disabil ; 51(4): 363-380, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-28498732

RESUMO

The purpose of this best evidence synthesis was to identify promising interventions that align with a theoretical model of early writing development, targeting three components of early writing: transcription, text generation, and self-regulation. We determined the extent to which these interventions are effective for children who struggle with early writing skills, by calculating effect sizes for group and single-subject designs, and we examined the overall quality of the research. Twenty-five studies met inclusion criteria. Among group design studies, mean effects (Hedge's g) ranged from 0.19 to 1.17 for measures of writing quantity and from 0.17 to 0.85 for measures of writing quality. Percentage of all nonoverlapping data for single-subject designs ranged from 83% to 100% for measures of writing quantity. Interventions with the strongest evidence of effects and highest methodological quality are described in detail. Recommendations for research and practice are provided.


Assuntos
Desenvolvimento Infantil , Deficiências da Aprendizagem/reabilitação , Ensino de Recuperação/métodos , Redação , Criança , Humanos
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