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1.
J Biol Chem ; : 107792, 2024 Sep 19.
Artigo em Inglês | MEDLINE | ID: mdl-39305956

RESUMO

Microtubule-associated protein, MAP1B, is crucial for neuronal morphogenesis and disruptions in MAP1B function are correlated with neurodevelopmental disorders. MAP1B encodes a single polypeptide that is processed into discrete proteins, a heavy chain (HC) and a light chain (LC); however, it is unclear if these two chains operate individually or as a complex within the cell. In vivo studies have characterized the contribution of MAP1B HC and LC to microtubule and actin-based processes, but their molecular mechanisms of action are unknown. Using in vitro reconstitution with purified proteins, we dissect the biophysical properties of the HC and LC and uncover distinct binding behaviors and functional roles for these MAPs. Our biochemical assays indicate that MAP1B HC and LC do not form a constitutive complex, supporting the hypothesis that these proteins operate independently within cells. Both HC and LC inhibit the microtubule motors, kinesin-3, kinesin-4, and dynein, and differentially affect the severing activity of spastin. Notably, MAP1B LC binds to actin filaments in vitro and can simultaneously bind and crosslink actin filaments and microtubules, a function not observed for MAP1B HC. Phosphorylation of MAP1B HC by DYRK1a negatively regulates its actin-binding activity without significantly affecting its microtubule-binding capacity, suggesting a dynamic contribution of MAP1B HC in cytoskeletal organization. Overall, our study provides new insights into the distinct functional properties of MAP1B HC and LC, underscoring their roles in coordinating cytoskeletal networks during neuronal development.

2.
BMC Health Serv Res ; 24(1): 1159, 2024 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-39354489

RESUMO

BACKGROUND: Informal caregivers of older adults play a vital role in improving the degree to which older adults access community and healthcare services in a seamless and timely manner. They are fulfilling important navigation and support roles for their older care recipients. However, there is still little knowledge of the most significant facilitators and barriers to effective and efficient system navigation among caregivers. This paper aims to fill these knowledge gaps through investigation of the key factors (i.e., social capital/cohesion, caregiving supports, and utilization factors) affecting navigation difficulties faced by informal caregivers of older adults. METHODS: The Behavioural-Ecological Framework of Healthcare Access and Navigation (BEAN) model is used to frame the study. Using the General Social Survey on Caregiving and Care Receiving 2018, we analyzed 2,733 informal caregivers whose primary care recipients were aged 65 or older. Hierarchical logistic regression was conducted to identify the relationship between system navigation difficulties among informal caregivers and four sequentially ordered blocks of predictors: (1) sociodemographic (2), social capital/cohesion (3), caregiving supports, and (4) healthcare demand. RESULTS: The fully adjusted model showed that the probability of reporting navigation difficulties was lower for caregivers with social capital/cohesion compared to those without social capital/cohesion. In comparison, the probability of reporting navigation difficulties was higher among caregivers with caregiving support and among caregivers whose care receivers use a higher amount of health service use. Several sociodemographic covariates were also identified. CONCLUSION: Our findings support certain aspects of the BEAN model. This study extends our understanding of potential facilitators and barriers that informal caregivers of older adults face while navigating complex community and health systems. There is a need to implement coordinated schemes and health policies especially for older adults with mental/neurological issues to address the challenges of their caregivers given the specific vulnerability identified in this study. The need for further research using different approaches to examine the disproportionate impact of COVID-19 on caregivers' system navigation experience is crucial.


Assuntos
Cuidadores , Capital Social , Apoio Social , Humanos , Cuidadores/psicologia , Cuidadores/estatística & dados numéricos , Idoso , Feminino , Masculino , Modelos Logísticos , Pessoa de Meia-Idade , Idoso de 80 Anos ou mais , Acessibilidade aos Serviços de Saúde , Navegação de Pacientes
3.
Int J Aging Hum Dev ; : 914150241240120, 2024 Mar 20.
Artigo em Inglês | MEDLINE | ID: mdl-38509694

RESUMO

Drawing from a life course perspective, this paper examines mid/later-life parent-child relationship quality among ethnically diverse families. Focus is on the role of culture, child, and parental characteristics. Data are drawn from a study of 588 parents aged 50+ of a least one child aged 19-35 who reside in Metro Vancouver, B.C. from four Canadian cultural groups: British, Chinese, Persian/Iranian, and South Asian. Using OLS regression methods, we use two dependent variable scales: positive and negative support/interaction appraisals of the relationship. The positive relationship quality scale is associated with South Asian versus British-Canadian parents, mothers, those with greater income satisfaction, and daughters. The negative scale is inversely associated among South Asian versus British-Canadian parents, income satisfaction, parental health, and being unpartnered (vs. partnered). Interaction effects are found between gender and ethnicity. Implications for theorizing and applied recommendations for those who work with culturally diverse aging families are discussed.

4.
Gerontology ; 69(3): 289-300, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36167035

RESUMO

INTRODUCTION: The Healthy Caregiver Hypothesis (HCH) suggests that caregiving is associated with beneficial health impacts for family caregivers. However, mixed results have been reported, particularly when different levels of caregiving intensity were examined. This study analyzes the relationship between caregiving intensity and three health indicators (functional health, chronic illness, and self-rated general health) among Canadian older adults over 3 years. METHODS: We drew upon a subsample of 11,344 participants aged 65 years and older from the Baseline and Follow-up 1 data of the Canadian Longitudinal Study on Aging and used linear mixed models to test the hypothesis based on different levels of caregiving intensity. RESULTS: Older adults who provided low-intensity care recently or continuously reported better functional health and self-rated health than noncaregivers. In contrast, older adults with low-intensity caregiving responsibility reported more chronic conditions over time compared to noncaregivers, but this association was not found for high-intensity caregivers. DISCUSSION/CONCLUSION: This study elucidates the HCH by incorporating caregiving intensity to understand patterns of better functional health and perceived health but more chronic conditions. The findings yielded from different health indicators suggest the impact of caregiving on health may be domain specific.


Assuntos
Envelhecimento , Cuidadores , Humanos , Idoso , Estudos Longitudinais , Canadá , Nível de Saúde , Doença Crônica
5.
Int J Aging Hum Dev ; 94(3): 312-343, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-34636660

RESUMO

Given the increasing complexity and fluidity of parenting, caregiving, and paid work patterns, in tandem with an increased risk of multimorbidity in mid-life, this study examines the relationship between these three concurrent roles and social isolation among middle-aged persons across multimorbidity statuses. Drawing upon life course theory, we applied linear mixed models to analyze 29,847 middle-aged participants from two waves of the Canadian Longitudinal Study on Aging. Findings reveal that participants experience greater social isolation over time, albeit the difference is extremely small. Among participants without multimorbidity, holding multiple roles is associated with lower social isolation. For those with multimorbidity, being employed full-time and providing intensive care are associated with social isolation. The occurrence of multiple roles demonstrates unique associations with social isolation among those with and without multimorbidity over time. Future research should study multimorbidity as a salient contextual variable. Moreover, enhanced support is needed for multimorbid middle-aged individuals with different role demands.


Assuntos
Envelhecimento , Multimorbidade , Canadá/epidemiologia , Doença Crônica , Humanos , Estudos Longitudinais , Pessoa de Meia-Idade , Isolamento Social
6.
Int J Aging Hum Dev ; 93(4): 986-1011, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-32757618

RESUMO

Drawing from a sociocultural life course perspective, this study examines the linkages between two age-related family transitions: young adult children leaving home and parental retirement. A sample of 580 ethnically diverse parents aged 50+ with at least one adult child aged 19-35 living in Metro Vancouver, British Columbia, Canada, was used in this study based on four cultural groups: British-, Chinese-, Persian/Iranian-, or South Asian-Canadian. Separate survival analyses are used to predict the timing of, and associations between children's leaving home and parents' retirement. Later timing of adult children's leaving home is associated with delays in retirement of parents and is influenced by a number of predictors. Main and interaction effects were supported for ethnicity, where belonging to the Persian/Iranian ethnic group (compared to British) delays home leaving, and belonging to Persian/Iranian and South Asian ethnic groups (compared to British) delays retirement timing.


Assuntos
Pais , Aposentadoria , Filhos Adultos , Colúmbia Britânica , Humanos , Irã (Geográfico)
7.
J Cross Cult Gerontol ; 36(4): 387-406, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34550533

RESUMO

It is well established that family and work-retirement transitions are increasingly becoming more complicated, extended, and reversible among aging parents. Combined with improved life expectancy, older parents are now confronted with new opportunities and challenges including their access to leisure activities. However, a paucity of research exists with regard to the extent to which older-aged parents are satisfied with their amount of leisure time as well as their ideal leisure preferences. Drawing upon socio-cultural life course theory, this paper examines how socio-demographic and ethnocultural variables (i.e., gender, ethnic identity), family-related factors (e.g., presence of children in the household), and socio-economic and work contexts (i.e., income satisfaction and retirement status) shape leisure time satisfaction and activity preferences. Data are drawn from the "Families and Retirement Project," a sample of 588 diverse (British-, Chinese-, Iranian/Persian-, South-Asian Canadians) aged 50 + (mean age = 59.6) residing in Metro Vancouver with at least one young adult child aged 19-35. Quantitative analyses reveal that leisure time satisfaction is higher among: those reporting lower levels of parental stress, the fully retired, those with less education, and among Chinese parents (compared to British). Moreover, strong variations by ethnic background are shown in preferred leisure activity, based on a thematic analysis of data. Results are discussed in terms of contributions to a socio-cultural family life course activity theory. Implications for community service provision (e.g., culturally sensitive and relevant recreational programs and services) are also highlighted, given the salience of participation in enjoyable leisure activities to healthy aging.


Assuntos
Atividades de Lazer , Satisfação Pessoal , Filhos Adultos , Canadá , Humanos , Irã (Geográfico) , Pais
8.
Int Psychogeriatr ; 32(1): 119-133, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31088579

RESUMO

OBJECTIVE: Recently, there has been a growing interest in examining forms of illness-related resilience. This study examines associations between lifestyle behavioral factors and multimorbidity resilience (MR) among older adults. METHODS: Using baseline data from the Comprehensive Cohort of the Canadian Longitudinal Study on Aging, we studied 6,771 Canadian adults aged 65 or older who reported two or more of 27 chronic conditions, and three multimorbidity clusters: cardiovascular/metabolic, osteo-related, and mental health. Associations were explored using hierarchical linear regression modeling, controlling for sociodemographic, social/environmental, and illness context covariates. RESULTS: Among older adults with two or more illnesses, as well as the cardiovascular/metabolic and osteo-related illness clusters, having a non-obese body mass, being a non-smoker, satisfaction with quality of sleep, having a good appetite, and not skipping meals are associated with MR. However, the mental-health cluster resulted in different behavioral lifestyle associations, where MR was not associated with obesity, smoking, or appetite, but inactivity demonstrated moderate positive associations with MR. DISCUSSION: While there are similar patterns of lifestyle behaviors across multimorbidity and multimorbidity clusters involving physiological chronic illnesses, those associated with mental health are distinct. The results have implications for healthy aging among persons coping with multimorbidity.


Assuntos
Envelhecimento/psicologia , Comportamentos Relacionados com a Saúde , Multimorbidade/tendências , Vigilância da População/métodos , Resiliência Psicológica , Idoso , Idoso de 80 Anos ou mais , Canadá/epidemiologia , Doença Crônica , Feminino , Humanos , Estilo de Vida , Modelos Lineares , Estudos Longitudinais , Masculino
9.
BMC Geriatr ; 18(1): 170, 2018 07 27.
Artigo em Inglês | MEDLINE | ID: mdl-30053838

RESUMO

BACKGROUND: Multimorbidity is recognized as a major public health issue that increases with age and affects approximately two-thirds of older people in Canada, the US, Australia and many European countries. This study develops and tests a three domain (functional, social and psychological) multimorbidity resilience composite index based on a previously developed lifecourse model of multimorbidity resilience, incorporating measures of adversity and positive adaptation. The criterion validity of the measure is demonstrated by means of an analysis of key outcome variables drawn from the literature. METHODS: We used the baseline data from the Comprehensive Cohort of the Canadian Longitudinal Study on Aging. Associations of functional, social, psychological as well as total resilience with two health utilization and three illness context outcome variables were examined using logistic regression analyses, adjusted for age, gender, marital status, income, education, region, and number of chronic conditions. RESULTS: The sample included all 6771 Canadian adults aged 65 or older (mean age 73.0, 57% women) who reported two or more of 27 possible chronic conditions. Total resilience was associated with: perceived health (OR = 1.68, CI 1.59-1.77); sleep quality (OR = 1.34, CI 1.30-1.38); perceived pain (OR = 0.80, CI 0.77-0.83); hospital overnight stays (OR = 0.87, CI 0.83-0.91); and emergency department visits (OR = 0.90, CI 0.87-0.94)., after adjusting for socio-demographic factors, and number of chronic conditions. These associations were similar for the unadjusted models, as well as for the functional, social and psychological resilience sub-indices. CONCLUSIONS: Combining components of adversity and positive adaptation within functional, social and psychological domains produces a measure of multimorbidity resilience that is associated with more positive health outcomes. Several implications of a composite multimorbidity resilience measure for clinical practice are identified. This measure can be replicated using measures found in other secondary health data sets. Future validation using longitudinal data is warranted.


Assuntos
Envelhecimento/psicologia , Multimorbidade/tendências , Vigilância da População , Resiliência Psicológica , Inquéritos e Questionários/normas , Idoso , Idoso de 80 Anos ou mais , Canadá/epidemiologia , Doença Crônica , Estudos de Coortes , Feminino , Humanos , Renda/tendências , Estudos Longitudinais , Masculino , Estado Civil , Pessoa de Meia-Idade , Vigilância da População/métodos , Reprodutibilidade dos Testes
10.
BMC Geriatr ; 16(1): 163, 2016 Sep 23.
Artigo em Inglês | MEDLINE | ID: mdl-27663198

RESUMO

BACKGROUND: Multimorbidity has been recognized as a major public health issue, negatively affecting health-related quality of life, including physical, functional, mental, emotional, and social domains, as well as increasing health care utilization. This exploratory study examines selected health outcomes associated with multimorbidity across older age groups/cohorts and gender, comparing Canada and Australia. METHODS: Data were drawn from the 2008/09 Canadian Community Health Survey and the 2009 Australian HILDA survey. Seven major chronic conditions were identical across the two data sets, and were combined into an additive measure of multimorbidity. OLS and logistic regression models were performed within age group (45-54, 55-64, 65-74, 75+) and gender to estimate associations between multimorbidity and several health-related outcomes, including: loneliness, life satisfaction, perceived health, mobility restriction, and hospital stays, adjusting for marital status, education and foreign born status. RESULTS: Overall, country-level differences were identified for perceptions of loneliness, life satisfaction, and perceived health. Australians tended to experience a greater risk of loneliness and lower self-rated health in the face of multimorbidity than Canadians, especially among older men. Canadians tended to experience lower life satisfaction associated with multimorbidity than Australians. No country-level differences were identified for associations between multimorbidity and hospital stays or mobility limitations. CONCLUSIONS: The associations between multimorbidity and health are similar between the two countries but are variable depending on population, age group/cohort, and gender. The strongest country-level associations are for indicators of health-related quality of life, rather than health care or mobility limitation outcomes.

11.
J Women Aging ; 26(4): 332-50, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25133945

RESUMO

This study draws upon a sociocultural stress and coping perspective to examine generational demands in midlife families. It examines both the predictors and family-related circumstances that contribute to perceptions of greater demand, with a focus on gendered and ethnocultural dimensions. Using mixed-methods, data are based on a sample of 236 parents collected in 2006/2007 from four cultural groups: British-, Chinese-, Southern European-, and South Asian Canadian. Key findings reveal that caregiving experiences remain highly gendered and are mediated by ethnocultural background and other work/family contextual characteristics. Recommendations for those who work directly with culturally diverse "sandwiched" generation families are highlighted.


Assuntos
Cuidadores/psicologia , Características da Família/etnologia , Estresse Psicológico/etnologia , Adaptação Psicológica , Idoso , Idoso de 80 Anos ou mais , Colúmbia Britânica , Feminino , Humanos , Entrevistas como Assunto , Masculino , Pessoa de Meia-Idade , Relações Pais-Filho/etnologia
12.
J Elder Abuse Negl ; 26(1): 80-105, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24313799

RESUMO

This exploratory study addresses whether there are similar or different risks and protective factors associated with spousal abuse among mid-age adults (persons aged 45-59) and old-age adults (persons aged 60 and over). The risk and protective factors of abuse are compared across these two age groups and situated within a life course framework. Cross-sectional data from the 1999 and 2004 General Social Surveys are merged to address the research questions. Overall, it was found that there are as many differences as there are similarities in risk/protective factors connected to individual, relationship, and community environments. The findings are discussed in terms of program development and future research.


Assuntos
Abuso de Idosos/estatística & dados numéricos , Maus-Tratos Conjugais/estatística & dados numéricos , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Canadá , Estudos Transversais , Feminino , Nível de Saúde , Inquéritos Epidemiológicos , Humanos , Masculino , Pessoa de Meia-Idade , Prevalência , Fatores de Risco , Meio Social
13.
J Aging Health ; : 8982643241289516, 2024 Oct 03.
Artigo em Inglês | MEDLINE | ID: mdl-39361775

RESUMO

Objectives: Death anxiety is feelings of worry and fear regarding death. This study explored the effect of number of chronic conditions on death anxiety in older adults and the moderating effect of age. Methods: This study used the fifth, sixth, seventh, and eighth waves of longitudinal data (2012-2021) collected in Anhui, China (5014 person-year observations). A mixed linear model was used to examine the effect of number of chronic conditions on death anxiety and the moderating effect of age. Results: The number of chronic conditions showed an inverted U-shaped relationship with death anxiety, with death anxiety being lower in older adults with older age. As age increased, the U-shaped curve became flatter, and the extremes shifted to the right. Discussion: Particular attention should be given to younger older adults with chronic conditions to help them recover earlier from the negative impact by providing information and counseling about their chronic conditions.

14.
Can J Aging ; : 1-12, 2024 May 30.
Artigo em Inglês | MEDLINE | ID: mdl-38812428

RESUMO

The COVID-19 pandemic has presented numerous challenges to older adults in Canada, including the ability to volunteer. The purpose of this study is to improve the understanding of the social context surrounding volunteering in Canada, by (a) determining changes in associations between human, social, and cultural capital and volunteering among older adults; and (b) examining the relationship between ethnic minority status and volunteering, using data from the Canadian Longitudinal Study on Aging (CLSA), collected prior to and during the pandemic. This study utilized data from 24,306 CLSA Baseline, Follow-up 1 (FUP1), and COVID-19 Baseline Survey participants (aged 55+). Results confirm a decrease in volunteering during the early stages of the pandemic. Compared to pre-pandemic associations, volunteers during the early stages of the pandemic were more likely to be young-old, male, employed, and not involved in religious activities. Findings provide evidence of pandemic effects on volunteering among older adults in Canada.

15.
J AOAC Int ; 96(5): 1068-72, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-24282949

RESUMO

After an assessment of data generated from a single-laboratory validation study published in J. AOAC Int. 95, 1469-1478 (2012), a method for determining total myo-inositol in infant formula and adult/ pediatric nutritional formula by high-performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD), including extraction by using microwave-assisted acid hydrolysis and enzymatic treatment was presented for consideration by AOAC during the AOAC Annual Meeting held in Las Vegas, NV, from September 30 to October 3, 2012. The Expert Review Panel on Infant Formula and Adult Nutritionals concluded that the method met the criteria set by the standard method performance requirements (SMPRs) for the determination of free myo-inositol and approved the method as AOAC Official First Action. The method also determines total myo-inositol, but includes bound sources that the SMPRs exclude. The method involves using HPAEC-PAD for free myo-inositol and a total myo-inositol determination by two different techniques. The first technique uses the conventional acid hydrolysis with 6 h incubation in an autoclave. The second uses a microwave-assisted acid hydrolysis with enzymatic treatment that decreases the extraction time.


Assuntos
Cromatografia por Troca Iônica/métodos , Alimentos Formulados/análise , Fórmulas Infantis/química , Inositol/análise , Técnicas Eletroquímicas , Hidrólise , Inositol/isolamento & purificação , Micro-Ondas
16.
J Gerontol B Psychol Sci Soc Sci ; 78(8): 1423-1434, 2023 08 02.
Artigo em Inglês | MEDLINE | ID: mdl-37202207

RESUMO

OBJECTIVES: Older adults (65 years and older) are increasingly providing care for their spouses, family members, and nonkin others (e.g., friends and neighbors). However, available knowledge of older caregivers is limited to spousal caregivers and their psychological outcomes. Other caregiver role types or social outcomes among older caregivers are less well studied. Thus, this study examines the social participation and social support among older caregivers by comparing 3 types of older caregivers, including spousal caregivers, nonspouse family caregivers, and nonkin caregivers. METHODS: Participants for this study were drawn from the Baseline and Follow-up 1 data from the Canadian Longitudinal Study on Aging. A total of 3,789 older adults became caregivers during the 2 data collection time points. Linear mixed models were applied to examine the change of social participation and social support among the three caregiver role types over the course of survey. RESULTS: The study finds that after transitioning into the caregiving role, spousal caregivers, and nonkin caregivers experienced a decline in social participation, and spousal caregivers also received less social support over time. When comparing the 3 caregiver role types, spousal caregivers reported the greatest decline in social participation and social support. DISCUSSION: This study adds to the relatively limited knowledge of older caregivers by presenting the changes in social participation and social support after transitioning into 3 types of caregiver roles. The results indicate the need to provide support for caregivers, particularly spousal and nonkin caregivers, to help them maintain social relationships and networks for participation and support.


Assuntos
Cuidadores , Participação Social , Humanos , Idoso , Cuidadores/psicologia , Estudos Longitudinais , Canadá , Apoio Social , Envelhecimento , Cônjuges/psicologia
17.
BMJ Open ; 13(12): e077641, 2023 12 09.
Artigo em Inglês | MEDLINE | ID: mdl-38070939

RESUMO

OBJECTIVE: Informal caregivers are playing a vital role in improving the degree to which older adults access community and healthcare systems in a more seamless and timely manner, thereby fulfilling their complex needs. It is critical to understand their experiences and perspectives while navigating these systems. This review aimed to identify and organise the research findings on the roles and experiences of informal caregivers of older adults while navigating community and healthcare systems. DESIGN: This scoping review was undertaken according to the Joanna Briggs Institute's Reviewer manual. Four databases were used: AgeLine, PsycINFO, CINAHL and Medline to capture literature with a focus on informal caregivers whose care recipients are aged 55 years or older. Articles were included if they focused on examining the experience, perspective and/or role of informal caregivers in providing care for their older care recipients, while articles were excluded if they only focused on healthcare professionals or older adults. RESULTS: A total of 24 studies were identified that met the study inclusion criteria. This review elucidated the roles of caregivers as a primary system navigator and as an advocate for older adults. Numerous challenges/barriers in system navigation were uncovered, such as lack of consistency in fragmented systems, as well as facilitators, including interface/coordination roles. Finally, recommendations for better system navigation such as caregiver engagement and integration of continuity of care services were identified. CONCLUSION: The need to raise the visibility of the roles and experiences of informal caregivers in system navigation was highlighted. Further research needs to focus on implementing interventions for informal caregivers incorporating a care coordinator to fill the care gap within community and healthcare systems. This review has the potential to foster greater integration of community and healthcare systems.


Assuntos
Cuidadores , Atenção à Saúde , Idoso , Humanos , Família , Pessoal de Saúde , Pessoa de Meia-Idade
18.
J AOAC Int ; 95(5): 1469-78, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-23175982

RESUMO

A method for the analysis of free and total myo-inositol in foods, feeds, and infant formulas has been developed and validated using high-performance anion exchange chromatography with pulsed amperometric detection. The option of a free myo-inositol determination or a complete total myo-inositol determination from main bound sources can be achieved. These sources include phytates, lower'phosphorylated forms, and phosphatidylinositol. This approach gives the option for subtraction of myo-inositol from nonbioavailable sources when it is quantified using other methods if a total bioavailable myo-inositol result is desired for nutritional labeling of a product. The free analysis was validated in a milk-based infant formula, giving RSD(R) of 2.29% and RSD, of 2.06%. A mean recovery of 97.9% was achieved from various spike levels of myo-inositol. Certified National Institute of Standards and Technology reference material verified the method's compatibility and specificity. Two different total analyses were validated in a soy-based infant formula and compared. One technique involved using a conventional acid hydrolysis with autoclave incubation for 6 h, while the other used a novel technique of microwave-assisted acid hydrolysis with enzymatic treatment that can minimize extraction to 1 day. The autoclave analysis had RSD(R) of 2.08% and RSDr of 1.55%, along with a mean spike recovery of 102.1% at various myo-inositol spike levels. The microwave/enzyme total analysis had RSD(R) of 4.34% and RSD, of 4.70%, along with a mean spike recovery of 104.2% at various spike levels of myo-inositol. Main sources of myo-inositol including phytic acid and phosphatidylinositol were tested with both total analyses. Mean recoveries of phytic acid and phosphatidylinositol through the autoclave total analysis were 90.4 and 98.3%, respectively. Mean spike recoveries for these same sources in soy- based infant formula through the microwave/enzyme total analysis were 97.2 and 96.3%, respectively. Comparison of soy-based infant formula and corn grain samples with high levels of these main sources showed in similar results, indicating both total analyses are acceptable for use. An additional glycerol kinase step was also developed to remove glycerol from the chromatographic elution window of myoinositol in samples with high levels of glycerol.


Assuntos
Ração Animal/análise , Fracionamento Químico/métodos , Cromatografia/métodos , Análise de Alimentos/métodos , Alimentos Infantis/análise , Inositol/química , Ativação Enzimática , Contaminação de Alimentos , Humanos , Hidrólise , Lactente , Micro-Ondas , Padrões de Referência
19.
Clin Soc Work J ; 50(1): 3-10, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-33589847

RESUMO

The COVID-19 pandemic necessitated an abrupt conclusion of field placement for social work interns at a comprehensive cancer center. In response to social distancing requirements, social workers, but not interns, were granted access to work remotely. Virtual programming became necessary to meet the interns' remaining educational requirements and provided an opportunity for proper termination from the program. This article will delineate the program redesign for oncology social work interns using remote/virtual modalities. This melded approach involved creating simulated clinical interactions, based on selected points along the illness trajectory targeting specific clinical competencies, which were presented to interns by phone and/or videoconference. Examples will be provided related to developing clinical skills and critical thinking and preparing for professional responsibilities within a broad range of healthcare settings. Guidelines for working with individuals, couples/families, and groups will be included. Issues of individual and group supervision will be explored, with sensitivity to the parallel experience of existential uncertainty and mortality awareness among the interns in the context of the pandemic. Although in-person training is preferable, there are advantages to virtual learning for both supervisors and interns. This creative adaptation of field education provides an innovative programming model that can be used to enhance the experience for social work interns moving forward in various healthcare settings during ordinary or extraordinary circumstances.

20.
Genes (Basel) ; 13(2)2022 01 25.
Artigo em Inglês | MEDLINE | ID: mdl-35205265

RESUMO

Three of the four species of giraffe are threatened, particularly the northern giraffe (Giraffa camelopardalis), which collectively have the smallest known wild population estimates. Among the three subspecies of the northern giraffe, the West African giraffe (Giraffa camelopardalis peralta) had declined to 49 individuals by 1996 and only recovered due to conservation efforts undertaken in the past 25 years, while the Kordofan giraffe (Giraffa camelopardalis antiquorum) remains at <2300 individuals distributed in small, isolated populations over a large geographical range in Central Africa. These combined factors could lead to genetically depauperated populations. We analyzed 119 mitochondrial sequences and 26 whole genomes of northern giraffe individuals to investigate their population structure and assess the recent demographic history and current genomic diversity of West African and Kordofan giraffe. Phylogenetic and population structure analyses separate the three subspecies of northern giraffe and suggest genetic differentiation between populations from eastern and western areas of the Kordofan giraffe's range. Both West African and Kordofan giraffe show a gradual decline in effective population size over the last 10 ka and have moderate genome-wide heterozygosity compared to other giraffe species. Recent inbreeding levels are higher in the West African giraffe and in Kordofan giraffe from Garamba National Park, Democratic Republic of Congo. Although numbers for both West African and some populations of Kordofan giraffe have increased in recent years, the threat of habitat loss, climate change impacts, and illegal hunting persists. Thus, future conservation actions should consider close genetic monitoring of populations to detect and, where practical, counteract negative trends that might develop.


Assuntos
Girafas , Animais , Genoma , Genômica , Geografia , Girafas/genética , Filogenia
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