Kinetics of glucose-6-phosphate dehydrogenase (G6PD) activity during Plasmodium vivax infection: implications for early radical malaria treatment.

BACKGROUND: Plasmodium vivax relapses due to dormant liver hypnozoites can be prevented with primaquine. However, the dose must be adjusted in individuals with glucose-6-phosphate-dehydrogenase (G6PD) deficiency. In French Guiana, assessment of G6PD activity is typically delayed until day (D)14 to avoid the risk if misclassification. This study assessed the kinetics of G6PD activity throughout P. vivax infection to inform the timing of treatment. METHODS: For this retrospective monocentric study, data on G6PD activity between D1 and D28 after treatment initiation with chloroquine or artemisinin-based combination therapy were collected for patients followed at Cayenne Hospital, French Guiana, between January 2018 and December 2020. Patients were divided into three groups based on the number of available G6PD activity assessments: (i) at least two measurements during the P. vivax malaria infection; (ii) two measurements: one during the current infection and one previously; (iii) only one measurement during the malaria infection. RESULTS: In total, 210 patients were included (80, 20 and 110 in groups 1, 2 and 3, respectively). Data from group 1 showed that G6PD activity remained stable in each patient over time (D1, D3, D7, D14, D21, D28). None of the patients with normal G6PD activity during the initial phase (D1-D3) of the malaria episode (n = 44) was categorized as G6PD-deficient at D14. Patients with G6PD activity < 80% at D1 or D3 showed normal activity at D14. Sex and reticulocyte count were statistically associated with G6PD activity variation. In the whole sample (n = 210), no patient had severe G6PD deficiency (< 10%) and only three between 10 and 30%, giving a G6PD deficiency prevalence of 1.4%. Among the 100 patients from group 1 and 2, 30 patients (26.5%) were lost to follow-up before primaquine initiation. CONCLUSIONS: In patients treated for P. vivax infection, G6PD activity did not vary over time. Therefore, G6PD activity on D1 instead of D14 could be used for primaquine dose-adjustment. This could allow earlier radical treatment with primaquine, that could have a public health impact by decreasing early recurrences and patients lost to follow-up before primaquine initiation. This hypothesis needs to be confirmed in larger prospective studies.

Efficacy of Photobiomodulation Therapy in Older Adults: A Systematic Review.

BACKGROUND: The aim was to determine whether there is any available evidence on the efficacy of photobiomodulation therapy (PBMT) in older adults. METHODS: A literature search was performed including all articles published up to February 2024. Studies reporting data on PBMT in older adults were included. This study was registered with PROSPERO. RESULTS: In total, 406 studies were identified. After eliminating duplicates and irrelevant studies, 10 records were included in the final review. In all included studies, the protocols used to deliver PBMT were different in terms of type of device, wavelength, irradiation duration, and pulse frequency. In neurodegenerative diseases, two studies reported non-significant results, while two studies reported efficacy of PBMT. In wounds and ulcers, two out of three studies reported efficacy of PBMT. In macular degeneration, one study reported efficacy of PBMT. One study on hyposalivation reported efficacy of PBMT. CONCLUSION: PBMT appears to be a promising complementary treatment. All studies reported good compliance and safety throughout the treatment. In the future, it will be essential to harmonize PBMT parameters. Further studies are warranted to define the best indications, the most effective protocols, and the right population to target for use in routine practice.

[Prise en charge de l'iléostomie à haut débit chez les personnes âgées : une revue systématique de cas et de séries de cas]. / High-output ileostomy management in older adults: A systematic review of case reports and case series.

The aim was to perform a systematic review of cases published in the literature to describe the management of high-output ileostomy (HOI) in older adults. A literature search was performed in PubMed©, and Scopus© for all publications up to March 1st, 2023. Case reports and/or case series reporting data from older adults on HOI management were included. Publication year, country, sex, age, aetiology of the stomy, time from ileostomy to HOI, daily volume threshold, Treatment regimen, and effectiveness were extracted. In total, 428 studies were identified, of which 9 (describing 10 cases) were included in this review. The mean age was 69.9 ± 4.7 years. The most frequent aetiology of ileostomy was occlusion. The daily volume considered to be excessive ranged from 1 to 2 litres per 24-hour period. The main side effects of HOI were dehydration, acute renal failure, and weight loss. Loperamide was the most frequently used drug. Most studies reported that non-pharmacological therapies were also used. No death was reported in any of the studies. In all, ileostomy exposes older individuals to complications. Medical therapy with loperamide coupled with rehydration seems to be efficacious in the medium term. Multidisciplinary management is advisable, in order to increase the chances of achieving ostomy reversal as early as possible, when indicated.

Orthostatic hypotension and cognitive impairment: Systematic review and meta-analysis of longitudinal studies.

The association between cognitive disorders and orthostatic hypotension (OH) has been empirically explored, but the results have been divergent, casting doubt on the presence and direction of the association. The objective of this meta-analysis was to systematically review and quantitatively synthesize the association of OH and cognitive function, specifically mean score on the Mini-Mental State Examination (MMSE), cognitive impairment and incident dementia. A Medline search was conducted in May 2022 with no date limit, using the MeSH terms "orthostatic hypotension" OR "orthostatic intolerance" OR "hypotension" combined with the Mesh terms "cognitive dysfunction" OR "Alzheimer disease" OR "dementia" OR "cognition disorder" OR "neurocognitive disorder" OR "cognition" OR "neuropsychological test". Of the 746 selected studies, 15 longitudinal studies met the selection criteria, of which i) 5 studies were eligible for meta-analysis of mean MMSE score comparison, ii) 5 studies for the association of OH and cognitive impairment, and iii) 6 studies for the association between OH and incident dementia. The pooled effect size in fixed-effects meta-analysis was: i) -0.25 (-0.42; -0.07) for the mean MMSE score, which indicates that the MMSE score was lower for those with OH; ii) OR (95 % CI) = 1.278 (1.162; 1.405), P < 0.0001, indicating a 28 % greater risk of cognitive impairment for those with OH at baseline; and iii) HR (95 % CI) = 1.267 (1.156; 1.388), P < 0.0001, indicating a 27 % greater risk of incident dementia for those with OH at baseline. Patients with OH had a lower MMSE score and higher risk of cognitive impairment and incident dementia in this meta-analysis of longitudinal studies. This study confirmed the presence of an association between OH and cognitive disorders in older adults.

Malnutrition and its determinants among older adults living in foster families in Guadeloupe (French West Indies). A cross-sectional study.

BACKGROUND: Foster families may represent an alternative model for dependent older adults in many countries where nursing homes are insufficiently developed. This study aimed to assess the prevalence of malnutrition and its determinants in older adults living in foster families in Guadeloupe (French West Indies). METHODS: This cross-sectional study was gathered from the KASAF (Karukera Study of Ageing in Foster families) study (n = 107, 41M/66F, Mdn 81.8 years). Nutritional status was assessed with the Mini Nutritional Assessment Short-Form (MNA-SF). Clinical characteristics and scores on geriatric scales (Mini-Mental State Examination (MMSE), Activities of Daily Living (ADL), Short Physical Performance Battery (SPPB), Center for Epidemiologic Studies- Depression (CESD) and Questionnaire Quality of Life Alzheimer's Disease (QoL-AD)) were extracted. Bivariate analysis and logistic models adjusted for age and gender were performed to test the association of nutritional status with socio-demographic variables and geriatric scales. RESULTS: Thirty (28.0%) older adults were malnourished (MNA-SF score ≤7). In bivariate analysis, malnutrition was associated with an increased prevalence of cardiovascular diseases (46.7% versus 19.5%, p = 0.004), the presence of hemiplegia (30.0% versus 6.5%, p = 0.003), a poorer cognitive status (MMSE score 4.7 ± 7.1versus 9.7 ± 10.7; p = 0.031), higher risk of depression (CESD score 27.3 ± 23.0 versus 13.5 ± 14.4; p = 0.035) and dependency (ADL score 1.9 ± 1.9 versus 2.3 ± 2.1; p<0.001). Malnutrition was also associated with lower caregivers'rating of QoL (QoL-AD score 21.8 ± 6.4 versus 26.0 ± 5.7; p = 0.001) but not by older adult's rating (24.1 ± 11.2 versus 28.3 ± 7.7; p = 0.156). Similar associations were observed in logistic models adjusted for age and gender. CONCLUSION: Malnutrition was common among foster families for older adults. Special attention towards the prevention and treatment of malnutrition in older adults from cardiovascular diseases, cognitive impairment, dependency and depression is necessary in this model of dependency support.

Longitudinal follow-up of mixed connective tissue disease and overlapping autoimmune diseases of childhood onset in the Afro-descendant population of the French West Indies.

INTRODUCTION: Overlap autoimmune syndromes (OAS) and mixed connective tissue disease (MCTD) are rare in children. We performed a retrospective, longitudinal and descriptive study of Afro-Caribbean patients from the French West Indies followed for MCTD and OAS to describe their characteristics and outcomes during childhood. METHODS: Retrospective study from January 2000 to 2023. Listings of patients were obtained from multiple sources: computerized hospital archives and national hospital-based surveillance system, registry of pediatricians and adult specialists in internal medicine and the national registry for rare diseases. MCTD was defined according to Kasukawa's criteria. OAS was defined as overlapping features of systemic lupus erythematosus (SLE), systemic sclerosis (SSc), and dermatomyositis/autoimmune myositis (DM/AM). RESULTS: Sixteen patients were included over a 23-year period (10 MCTD and 6 OAS). The incidence was 0.23 per 100,000 children-years. The mean age at diagnosis was 11.9 years old (2.4-17) with median follow up of 7.9 years (2.1-19.6). SLE phenotype was present in the highest, followed by SSc and DM/AM. Patients had an average of three flares during childhood (1-7). A quarter (25%) had symptomatic pulmonary arterial hypertension (PAH). Ninety-four percent received steroids during follow-up and 88% required a corticosteroid-sparing therapy. Three patients (19%) developed SLE after more than 10y of follow-up. There were no death and no chronic organ failure. CONCLUSION: This is the largest pediatric cohort of MCTD and OAS in Afro-descendant patients treated in a country with a high standard of care. The clinical evolution did not differ between MCTD and OAS. The main complication was PAH, more frequent in our cohort.

Clinical Characteristics of Older Adults Living in Foster Families in the French West Indies: Baseline Screening of the KArukera Study of Aging in Foster Families (KASAF) Cohort.

Background and Objectives: Foster families for older adults could represent a transitional or alternative model to nursing homes. The aim of this study was to describe the clinical characteristics of older adults in foster families and to compare them with those of residents in nursing homes in French West Indies. Research Design and Methods: This study is a cross-sectional analysis of the KArukera Study of Aging in Foster Families (KASAF) cohort. Sociodemographic and clinical characteristics were extracted. Dependency was assessed using the Activities of Daily Living (ADL) scale and cognition using the Mini-Mental State Examination (MMSE) scale. Age, gender, ADL, and MMSE scores were compared with nursing home residents from a twin study of KASAF (n = 332). Results: A total of 107 older adults (mean age 81.8 years; 61.7% women) were recruited in 56 foster families between September 2020 and May 2021. In all, 25.5% had diabetes mellitus and 45.8% suffered from hypertension. The mean MMSE score was 9.3 ± 10.1 and 76.0% had major cognitive impairment (MMSE score <18); 12.5% were diagnosed with Parkinson's disease, and 42.0% of the residents were confined to bed or in a wheelchair, with a mean ADL score of 1.5 ± 1.8. Almost all the residents (96.3%) benefited from a medical follow-up by a nurse who visited once or twice a day. Compared to older adults living in nursing homes, those in foster families were more frequently women (61.7% vs 49.4%) and had lower ADL score (1.5 vs 2.4) and lower MMSE score (9.3 vs 11.3). Discussion and Implications: The clinical profile of foster families' residents was quite similar to that of nursing home residents in terms of demographics, dementia, and dependency. Foster families might represent an interesting strategy to address the unmet clinical and social needs of dependent older adults, especially in countries where nursing homes are not sufficiently developed. Clinical Trials Registration Number: NCT04545775.

Research challenges and opportunities in the Caribbean area: first bibliometric study in the French West Indies, from 1989 to 2018

[ABSTRACT]. Objective. To analyze, describe, and quantify the collaborations and scientific output of the two university teaching hospitals of Martinique and Guadeloupe, at the regional, national, and international level. Methods. A bibliometrics analysis was performed from the international databases Web of Science and PubMed, for the period from 1989 to 2018, inclusive (30 years). Three types of bibliometric indicators were used, namely quantitative indicators, performance indicators, and organization-specific indicators. Affiliations of the first and last authors were identified from PubMed. Results. Between 1989 and 2018, a total of 1 522 indexed articles were published with at least one author affiliated to either the University Hospital of Martinique (n = 827) or the University Hospital of Guadeloupe (n = 685). The majority of articles were in category Q1 (35.8% for Martinique and 35.2% for Guadeloupe). In Martinique, over the last 30 years, the three main research areas have been clinical neurology, ophthalmology, and surgery, together representing 28.7% of all research areas, with the highest number of articles published in the field of clinical neurology (n = 81). In the University Hospital of Guadeloupe, the area of hematology was largely represented, with 79 articles published. For both hospitals, the first and last authors of the articles published were mainly from mainland France. Conclusions. This quantitative analysis shows the development of medical and scientific research in Martinique and Guadeloupe over the last three decades, as well as the extent of their collaborative partnerships at the national and international levels.

[RESUMEN]. Objetivo. Analizar, describir y cuantificar las colaboraciones y la producción científica de los dos hospitales docentes universitarios de Martinica y Guadalupe, al nivel regional, nacional e internacional. Métodos. Se llevó a cabo un análisis de bibliometría de las bases de datos internacionales Web of Science y PubMed, en el período de 1989 al 2018, inclusive (30 años). Se emplearon tres tipos de indicadores bibliométricos, a saber: indicadores cuantitativos, indicadores de rendimiento e indicadores específicos de organización. Se establecieron las afiliaciones de los primeros y últimos autores de PubMed. Resultados. Entre 1989 y el 2018, se publicaron en total 1 522 artículos indizados con al menos un autor afiliado al Hospital Universitario de Martinica (n = 827) o bien al Hospital Universitario de Guadalupe (n = 685). La mayoría de los artículos estaban en el cuartil 1 (35,8 % en Martinica y 35,2 % en Guadalupe). En Martinica, en los últimos 30 años las tres principales áreas de investigación han sido la neurología clínica, la oftalmología y la cirugía, que juntas representan 28,7 % de todas las áreas de investigación, con el número más alto de artículos publicado en el campo de la neurología clínica (n = 81). En el Hospital Universitario de Guadalupe, el ámbito de la hematología estaba ampliamente representado, con 79 artículos publicados. En ambos hospitales, los primeros y los últimos autores de los artículos publicados eran principalmente de Francia continental. Conclusiones. Este análisis cuantitativo demuestra el desarrollo de la investigación médica y científica en Martinica y Guadalupe en los treinta últimos años, así como el alcance de sus asociaciones colaborativas a los niveles nacional e internacional.

[RESUMO]. Objetivo. Analisar, descrever e quantificar as colaborações e a produção científica dos dois hospitais universitários de Martinica e Guadalupe, no âmbito regional, nacional e internacional. Métodos. Foi realizada uma análise bibliométrica das bases de dados internacionais Web of Science e PubMed, no período de 1989 a 2018, inclusive (30 anos). Três tipos de indicadores bibliométricos foram utilizados: quantitativos, de desempenho e específicos da organização. Afiliações dos primeiros e últimos autores foram identificadas na base PubMed. Resultados. Entre 1989 e 2018, um total de 1 522 artigos indexados foram publicados com pelo menos um autor afiliado ao Hospital Universitário de Martinica (n = 827) ou ao Hospital Universitário de Guadalupe (n = 685). A maioria dos artigos estava na categoria Q1 (35,8% para Martinica e 35,2% para Guadalupe). Na Martinica, nos últimos 30 anos, as três principais áreas de pesquisa foram neurologia clínica, oftalmologia e cirurgia, representando, juntas, 28,7% de todas as áreas de pesquisa, com o maior número de artigos publicados no campo da neurologia clínica (n = 81). No Hospital Universitário de Guadalupe, a área de hematologia foi amplamente representada, com 79 artigos publicados. Para ambos os hospitais, os primeiros e os últimos autores dos artigos publicados eram principalmente da França continental. Conclusões. Esta análise quantitativa demonstra o desenvolvimento da pesquisa médica e científica na Martinica e em Guadalupe nas três últimas décadas, bem como a extensão de suas parcerias colaborativas no âmbito nacional e internacional.