LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 23232

Search options

  1. Article ; Online: Changes in Refractive Error During Young Adulthood: The Effects of Longitudinal Screen Time, Ocular Sun Exposure, and Genetic Predisposition.

    Lee, Samantha Sze-Yee / Lingham, Gareth / Wang, Carol A / Diaz Torres, Santiago / Pennell, Craig E / Hysi, Pirro G / Hammond, Christopher J / Gharahkhani, Puya / Clark, Rosie / Guggenheim, Jeremy A / Mackey, David A

    Investigative ophthalmology & visual science

    2023  Volume 64, Issue 14, Page(s) 28

    Abstract: Purpose: Changes in refractive error during young adulthood is common yet risk factors at this age ... Past sun exposure was quantified using conjunctival ultraviolet autofluorescence (CUVAF) area ... screen time, less sun exposure, and genetic predisposition are each independently associated with greater ...

    Abstract Purpose: Changes in refractive error during young adulthood is common yet risk factors at this age are largely unexplored. This study explored risk factors for these changes, including gene-environmental interactions.
    Methods: Spherical equivalent refraction (SER) and axial length (AL) for 624 community-based adults were measured at 20 (baseline) and 28 years old. Participants were genotyped and their polygenic scores (PGS) for refractive error calculated. Self-reported screen time (computer, television, and mobile devices) from 20 to 28 years old were collected prospectively and longitudinal trajectories were generated. Past sun exposure was quantified using conjunctival ultraviolet autofluorescence (CUVAF) area.
    Results: Median change in SER and AL were -0.023 diopters (D)/year (interquartile range [IQR] = -0.062 to -0.008) and +0.01 mm/year (IQR = 0.000 to 0.026), respectively. Sex, baseline myopia, parental myopia, screen time, CUVAF, and PGS were significantly associated with myopic shift. Collectively, these factors accounted for approximately 20% of the variance in refractive error change, with screen time, CUVAF, and PGS each explaining approximately 1% of the variance. Four trajectories for total screen time were found: "consistently low" (n = 148), "consistently high" (n = 250), "consistently very high" (n = 76), and "increasing" (n = 150). Myopic shift was faster in those with "consistently high" or "consistently very high" screen time compared to "consistently-low" (P ≤ 0.031). For each z-score increase in PGS, changes in SER and AL increased by -0.005 D/year and 0.002 mm/year (P ≤ 0.045). Of the three types of screen time, only computer time was associated with myopic shift (P ≤ 0.040). There was no two- or three-way interaction effect between PGS, CUVAF, or screen time (P ≥ 0.26).
    Conclusions: Higher total or computer screen time, less sun exposure, and genetic predisposition are each independently associated with greater myopic shifts during young adulthood. Given that these factors explained only a small amount of the variance, there are likely other factors driving refractive error change during young adulthood.
    MeSH term(s) Adult ; Humans ; Young Adult ; Genetic Predisposition to Disease ; Screen Time ; Sunlight/adverse effects ; Refractive Errors/genetics ; Myopia/genetics ; Conjunctiva
    Language English
    Publishing date 2023-11-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 391794-0
    ISSN 1552-5783 ; 0146-0404
    ISSN (online) 1552-5783
    ISSN 0146-0404
    DOI 10.1167/iovs.64.14.28
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Can the supplementation of vitamin D, sun exposure, and isolation during the COVID-19 pandemic affect the seasonal concentration of 25(OH)D and selected blood parameters among young soccer players in a one-year training season?

    Jastrzębska, Joanna / Skalska, Maria / Radzimiński, Łukasz / López Sánchez, Guillermo F / Hill, Lee / Weiss, Katja / Knechtle, Beat

    Journal of the International Society of Sports Nutrition

    2023  Volume 20, Issue 1, Page(s) 2206802

    Abstract: ... and selected biomarkers in young soccer players along a one-year training cycle.: Method: Forty ... elite young soccer players (age: 17.2 ± 1.16 years, body mass: 70.2 ± 5.84, and body height: 179.1 ± 4 ... Objective: This study examined the effect of vitamin D supplementation, sunlight ...

    Abstract Objective: This study examined the effect of vitamin D supplementation, sunlight radiationradiation, and home isolation during the COVID-19 pandemic on the seasonal changes in 25(OH)D concentration and selected biomarkers in young soccer players along a one-year training cycle.
    Method: Forty elite young soccer players (age: 17.2 ± 1.16 years, body mass: 70.2 ± 5.84, and body height: 179.1 ± 4.26 cm) participated in the research. Only 24 players completed the measurements during all four time- points (T1-: September 2019, T2-: December 2019, T3-: May 2020, and T4-: August 2020) and were divided into two subgroups: supplemented group (GS) and placebo group (GP). Players from GS received 5,000 IU of vitamin D for 8 weeks (January-MarchJanuary-March 2020). Several biomarkers such as 25(OH)D, white blood cells (WBC), red blood cells (RBC), hemoglobin (HGB), muscle damage markersmarkers, and lipid profile were measured.
    Results: AnalysisThe analysis of the total group demonstrated significant seasonal changes in 25(OH)D, HGB, asparagine aminotransferaseaminotransferase, and creatine kinase along the one1-year training cycle. The level of 25(OH)D concentrationinconcentration in T4 was significantly (
    Conclusion: Current research confirmed the significant seasonal changes in 25(OH)D concentration during four seasons. 8-weekEight-week vitamin D supplementation had no extended effect on the level of 25(OH)D concentration.
    MeSH term(s) Adolescent ; Humans ; Biomarkers ; COVID-19 ; Dietary Supplements ; Hemoglobins ; Pandemics ; Seasons ; Soccer/physiology ; Sunlight ; Vitamin D ; Vitamins
    Chemical Substances 25-hydroxyvitamin D (A288AR3C9H) ; Biomarkers ; Hemoglobins ; Vitamin D (1406-16-2) ; Vitamins
    Language English
    Publishing date 2023-03-31
    Publishing country United States
    Document type Controlled Clinical Trial ; Journal Article
    ZDB-ID 2162810-5
    ISSN 1550-2783 ; 1550-2783
    ISSN (online) 1550-2783
    ISSN 1550-2783
    DOI 10.1080/15502783.2023.2206802
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Changes of 25(OH)D Concentration, Bone Resorption Markers and Physical Performance as an Effect of Sun Exposure, Supplementation of Vitamin D and Lockdown among Young Soccer Players during a One-Year Training Season.

    Jastrzębska, Joanna / Skalska, Maria / Radzimiński, Łukasz / López-Sánchez, Guillermo F / Weiss, Katja / Hill, Lee / Knechtle, Beat

    Nutrients

    2022  Volume 14, Issue 3

    Abstract: ... bone resorption markers, and physical fitness along the one-year training season in young soccer players. A total ... of 24 young soccer players (age: 17.2 ± 1.16 years, mass: 70.2 ± 5.84, height: 179.1 ± 4.26 cm) were ... of increasing the 25(OH)D concentration in the young soccer players. ...

    Abstract The main purpose of this research was to demonstrate the changes in 25(OH)D concentration, bone resorption markers, and physical fitness along the one-year training season in young soccer players. A total of 24 young soccer players (age: 17.2 ± 1.16 years, mass: 70.2 ± 5.84, height: 179.1 ± 4.26 cm) were tested at four different time points across one year (T1-September 2019; T2-December 2019; T3-May 2020; T4-August 2020). After T2 (during COVID-19 lockdown), players were divided into a supplemented (GS) group and a placebo group (GP). Variables such as 25(OH)D, calcium (Ca), phosphorus (P), parathyroid hormone (PTH), aerobic capacity, speed, and explosive power were measured. Analyses performed for all participants indicated significant changes in all selected blood markers and running speed. The highest values in 25(OH)D were noted during summertime in T1 and T4. After individuals were split into two groups, a two-factorial ANOVA demonstrated a significant time interaction for 25(OH)D, Ca, P, PTH, 30 m sprint, and counter-movement jump. Significant time x group effect was calculated for aerobic capacity. This study confirmed that 25(OH)D concentration varies between four seasons, with the greatest decreases in the low sunlight periods. Vitamin D supplementation did not cause a preventive and long-lasting effect of increasing the 25(OH)D concentration in the young soccer players.
    MeSH term(s) Adolescent ; Athletic Performance ; Bone Resorption ; COVID-19 ; Communicable Disease Control ; Dietary Supplements ; Humans ; Physical Functional Performance ; SARS-CoV-2 ; Seasons ; Soccer ; Sunlight ; Vitamin D/analogs & derivatives
    Chemical Substances Vitamin D (1406-16-2) ; 25-hydroxyvitamin D (A288AR3C9H)
    Language English
    Publishing date 2022-01-25
    Publishing country Switzerland
    Document type Journal Article ; Randomized Controlled Trial
    ZDB-ID 2518386-2
    ISSN 2072-6643 ; 2072-6643
    ISSN (online) 2072-6643
    ISSN 2072-6643
    DOI 10.3390/nu14030521
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article: Changes of 25(OH)D Concentration, Bone Resorption Markers and Physical Performance as an Effect of Sun Exposure, Supplementation of Vitamin D and Lockdown among Young Soccer Players during a One-Year Training Season

    Jastrzębska, Joanna / Skalska, Maria / Radzimiński, Łukasz / López-Sánchez, Guillermo F. / Weiss, Katja / Hill, Lee / Knechtle, Beat

    Nutrients. 2022 Jan. 25, v. 14, no. 3

    2022  

    Abstract: ... bone resorption markers, and physical fitness along the one-year training season in young soccer players. A total ... of 24 young soccer players (age: 17.2 ± 1.16 years, mass: 70.2 ± 5.84, height: 179.1 ± 4.26 cm) were ... of increasing the 25(OH)D concentration in the young soccer players. ...

    Abstract The main purpose of this research was to demonstrate the changes in 25(OH)D concentration, bone resorption markers, and physical fitness along the one-year training season in young soccer players. A total of 24 young soccer players (age: 17.2 ± 1.16 years, mass: 70.2 ± 5.84, height: 179.1 ± 4.26 cm) were tested at four different time points across one year (T1—September 2019; T2—December 2019; T3—May 2020; T4—August 2020). After T2 (during COVID-19 lockdown), players were divided into a supplemented (GS) group and a placebo group (GP). Variables such as 25(OH)D, calcium (Ca), phosphorus (P), parathyroid hormone (PTH), aerobic capacity, speed, and explosive power were measured. Analyses performed for all participants indicated significant changes in all selected blood markers and running speed. The highest values in 25(OH)D were noted during summertime in T1 and T4. After individuals were split into two groups, a two-factorial ANOVA demonstrated a significant time interaction for 25(OH)D, Ca, P, PTH, 30 m sprint, and counter-movement jump. Significant time x group effect was calculated for aerobic capacity. This study confirmed that 25(OH)D concentration varies between four seasons, with the greatest decreases in the low sunlight periods. Vitamin D supplementation did not cause a preventive and long-lasting effect of increasing the 25(OH)D concentration in the young soccer players.
    Keywords COVID-19 infection ; blood ; bone resorption ; calcium ; group effect ; parathyroid hormone ; phosphorus ; physical activity ; physical fitness ; placebos ; solar radiation ; sports ; summer
    Language English
    Dates of publication 2022-0125
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2518386-2
    ISSN 2072-6643
    ISSN 2072-6643
    DOI 10.3390/nu14030521
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  5. Article ; Online: Effects of influenza vaccine and sun exposure time against laboratory-confirmed influenza hospitalizations among young children during the 2012-13 to 2015-16 influenza seasons.

    Wang, Ching-Yun / Chang, Yi-Hsuan / Huang, Li-Min / Chi, Hsin / Chiu, Nan-Chang / Chang, Luan-Yin / Lu, Chun-Yi / Huang, Yhu-Chering / Lin, Hsiao-Chuan / Lee, Jian-Te / Liu, Ching-Chuan / Huang, Yi-Chuan / Ho, Yu-Huai / Tu, Yi-Hsuan / Wang, Jin-Yuan / Huang, Daniel Tsung-Ning

    Journal of microbiology, immunology, and infection = Wei mian yu gan ran za zhi

    2019  Volume 52, Issue 6, Page(s) 880–887

    Abstract: ... We focused on the efficacies of other possible preventive measures such as increasing sun exposure time and ... Children with mean sun exposure time of >7 h/week had a significantly lower risk of influenza-related ... hospitalizations than those with the mean sun exposure time of ≤7 h/week (p < 0.05; OR, 0.667; 95% CI, 0.491-0.906 ...

    Abstract Background: Influenza is a major cause of acute respiratory infection burden worldwide, leading to many hospitalizations. An annual influenza vaccine is believed to be the best way to prevent influenza-related illnesses. We focused on the efficacies of other possible preventive measures such as increasing sun exposure time and dietary supplements to prevent these illnesses.
    Methods: We conducted a matched-pair case-control study along with the Taiwan Pediatric Infectious Disease Alliance. We included influenza-related hospitalized patients with age ranging from 6 months to 5 years during the 2012-2013, 2013-2014, 2014-2015, and 2015-2016 influenza seasons. The controls were comparable to cases in age, sex, and residential area and had no influenza-related hospitalization records in the same season. We extracted data from vaccination histories and got the patients' guardians to complete questionnaires. Data were analyzed using conditional logistic regression.
    Results: We enrolled 1514 children (421 influenza-infected cases and 1093 controls) in the study. We found seasonal influenza vaccination to be an independent protective factor against hospitalizations owing to influenza [p < 0.01; odds ratio (OR), 0.427; 95% confidence interval (CI), 0.306-0.594]. Children with mean sun exposure time of >7 h/week had a significantly lower risk of influenza-related hospitalizations than those with the mean sun exposure time of ≤7 h/week (p < 0.05; OR, 0.667; 95% CI, 0.491-0.906).
    Conclusions: Seasonal influenza vaccination effectively prevents influenza-related hospitalizations in children aged ≤5 years. Besides, >7 h of sun exposure/week may also be associated with lower risk of influenza-related hospitalizations in children.
    MeSH term(s) Case-Control Studies ; Child, Preschool ; Female ; Hospitalization/statistics & numerical data ; Humans ; Infant ; Influenza Vaccines/administration & dosage ; Influenza, Human/diagnosis ; Influenza, Human/immunology ; Logistic Models ; Male ; Odds Ratio ; Protective Factors ; Seasons ; Sunlight ; Taiwan ; Vaccination/statistics & numerical data
    Chemical Substances Influenza Vaccines
    Language English
    Publishing date 2019-10-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 1497590-7
    ISSN 1995-9133 ; 1684-1182 ; 0253-2662
    ISSN (online) 1995-9133
    ISSN 1684-1182 ; 0253-2662
    DOI 10.1016/j.jmii.2019.09.010
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: Sun exposure and the incidence of melanocytic nevi in young Australian children.

    Harrison, Simone Lee / MacLennan, Robert / Buettner, Petra Gertraud

    Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology

    2008  Volume 17, Issue 9, Page(s) 2318–2324

    Abstract: ... whereas avoiding sunburn in young children might prevent large MN, subsequently reducing the risk of melanoma. ... study further investigated the relationship between sun exposure, the incidence of MN, and ... was examined for MN in 1991 and a year later. Sun exposure was assessed by questionnaire ...

    Abstract The number of melanocytic nevi (MN) is an important risk factor for cutaneous melanoma. The present study further investigated the relationship between sun exposure, the incidence of MN, and the prevalence of large acquired MN (>or=5 mm). A cohort of 479 preschool children born in Townsville, Australia was examined for MN in 1991 and a year later. Sun exposure was assessed by questionnaire. The erythemally effective dose of solar UV radiation was estimated from questionnaire data combined with local UV biometry. Almost all (97.7%) children had acquired new MN (median, 12), with a median incidence rate of 11.0 per year (interquartile range, 7.0-16.5). Total number of hours of sun exposure during follow-up (P = 0.034) and tendency to burn (P = 0.028) were independent risk factors for MN incidence. Sunburn experience during follow-up failed to reach significance when adjusted for tendency to burn. Lifetime number of sunburns (P < 0.001) and the severity of sunburns experienced during follow-up (P < 0.001) were significantly related to the presence of large acquired MN at follow-up. Reducing the total number of hours of sun exposure is particularly relevant in sun-sensitive children and may restrain the development of MN, whereas avoiding sunburn in young children might prevent large MN, subsequently reducing the risk of melanoma.
    MeSH term(s) Australia/epidemiology ; Child ; Child, Preschool ; Data Interpretation, Statistical ; Female ; Humans ; Incidence ; Infant ; Longitudinal Studies ; Male ; Nevus, Pigmented/epidemiology ; Nevus, Pigmented/etiology ; Prevalence ; Risk Factors ; Skin Neoplasms/epidemiology ; Skin Neoplasms/etiology ; Sunburn/complications ; Sunlight/adverse effects ; Surveys and Questionnaires
    Language English
    Publishing date 2008-09
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1153420-5
    ISSN 1055-9965
    ISSN 1055-9965
    DOI 10.1158/1055-9965.EPI-07-2801
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article: The effects of regional characteristics on population growth in Korean cities, countries and wards/ Bun Song Lee, Sun Eae Chun, Suk Young Kim

    Lee, Bun Song / Chun, Sun Eae / Kim, Suk Young

    Journal of Asian economics Vol. 18, No. 3 , p. 490-508

    2007  Volume 18, Issue 3, Page(s) 490–508

    Keywords Bevölkerungsentwicklung ; Bevölkerungswachstum ; Regionales Wachstum ; Bildungsniveau ; Südkorea
    Language English
    Publisher Elsevier Science
    Publishing place Amsterdam [u.a.]
    Document type Article
    ZDB-ID 1061920-3
    Database ECONomics Information System

    More links

    Kategorien

  8. Article ; Online: In Vivo and In Vitro Models to Study Liver Fibrosis: Mechanisms and Limitations.

    Lee, Young-Sun / Seki, Ekihiro

    Cellular and molecular gastroenterology and hepatology

    2023  Volume 16, Issue 3, Page(s) 355–367

    Abstract: Liver fibrosis is a common result of liver injury owing to various kinds of chronic liver diseases. A deeper understanding of the pathophysiology of liver fibrosis and identifying potential therapeutic targets of liver fibrosis is important because liver ...

    Abstract Liver fibrosis is a common result of liver injury owing to various kinds of chronic liver diseases. A deeper understanding of the pathophysiology of liver fibrosis and identifying potential therapeutic targets of liver fibrosis is important because liver fibrosis may progress to advanced liver diseases, such as cirrhosis and hepatocellular carcinoma. Despite numerous studies, the underlying mechanisms of liver fibrosis remain unclear. Mechanisms of the development and progression of liver fibrosis differ according to etiologies. Therefore, appropriate liver fibrosis models should be selected according to the purpose of the study and the type of underlying disease. Many in vivo animal and in vitro models have been developed to study liver fibrosis. However, there are no perfect preclinical models for liver fibrosis. In this review, we summarize the current in vivo and in vitro models for studying liver fibrosis and highlight emerging in vitro models, including organoids and liver-on-a-chip models. In addition, we discuss the mechanisms and limitations of each model.
    MeSH term(s) Animals ; Liver Cirrhosis/pathology ; Fibrosis ; Carcinoma, Hepatocellular ; Liver Neoplasms/pathology
    Language English
    Publishing date 2023-06-01
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ZDB-ID 2819778-1
    ISSN 2352-345X ; 2352-345X
    ISSN (online) 2352-345X
    ISSN 2352-345X
    DOI 10.1016/j.jcmgh.2023.05.010
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: Effect of Reflected Sunlight on Differential Expression of Anthocyanin Synthesis-Related Genes in Young Apple Fruit

    Van Giap, Do / Kim, Seonae / Lee, Youngsuk / Kweon, Hun-Joong

    International journal of fruit science. 2021 Jan. 01, v. 21, no. 1

    2021  

    Abstract: ... was determined in fruits developed under the effect of sunlight exposure for seven days. Apple fruits ... were divided in to: ‘reflected sunlight’, ‘bagged’, and ‘control’ groups. The expression levels ... to reflected sunlight and the coloration was almost similar to that on the exposed side after the treatment ...

    Abstract Anthocyanin accumulation is responsible for the red color of the skin of apple fruits (Malus × domestica Borkh.). Environmental stimuli, such as light, temperature, soil factors, tree factors, and the application of chemicals can alter the synthesis of anthocyanins. Herein, we examined the expression of genes related to anthocyanin biosynthesis in the fruit of apple cultivars, ‘Summer Prince’ and ‘Arisoo’ at the early stage of fruit development 60 DAFB (days after full bloom). The expression of genes, which included structural and regulatory genes involved in anthocyanin biosynthesis, and light-responsive genes was determined in fruits developed under the effect of sunlight exposure for seven days. Apple fruits were divided in to: ‘reflected sunlight’, ‘bagged’, and ‘control’ groups. The expression levels of the anthocyanin synthesis-related genes were significantly different among the groups and between the shaded and reflected sides. We also determined the difference in coloration patterns in the different groups using the colorimetric coordinates method. The shaded side of apple fruits quickly turned more redder after exposure to reflected sunlight and the coloration was almost similar to that on the exposed side after the treatment. Strong correlation coefficients between anthocyanin-related gene expression levels and coloration patterns were obtained. This study shows that sunlight plays an important role in stimulating the coloration of apple fruit by regulating the expression of genes involved in anthocyanin accumulation during the early stage of fruit development. The present study assumes importance because redder fruits, generated through a non-transgenic approach would be more acceptable to consumers.
    Keywords Malus domestica ; anthocyanins ; apples ; biosynthesis ; color ; colorimetry ; cultivars ; flowering ; fruiting ; fruits ; gene expression ; gene expression regulation ; soil ; solar radiation ; temperature ; trees
    Language English
    Dates of publication 2021-0101
    Size p. 440-455.
    Publishing place Taylor & Francis
    Document type Article
    ZDB-ID 2235787-7
    ISSN 1553-8621 ; 1553-8362
    ISSN (online) 1553-8621
    ISSN 1553-8362
    DOI 10.1080/15538362.2021.1896981
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  10. Article ; Online: Micelle-based fluorogenic sensing of trypsin: a sensitive method in pancreatic disease diagnosis.

    Song, Hyebin / Choi, Haemin / Kim, Young-Sun / Lee, Seoung Ho

    Organic & biomolecular chemistry

    2024  

    Abstract: Protamine-mediated micellar aggregates, featuring an AIE-based fluorescent sensor, facilitate efficient detection of trypsin activity. This method enables the detection of trypsin at exceptionally low concentrations (0.01-0.1 μg ... ...

    Abstract Protamine-mediated micellar aggregates, featuring an AIE-based fluorescent sensor, facilitate efficient detection of trypsin activity. This method enables the detection of trypsin at exceptionally low concentrations (0.01-0.1 μg mL
    Language English
    Publishing date 2024-05-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 2097583-1
    ISSN 1477-0539 ; 1477-0520
    ISSN (online) 1477-0539
    ISSN 1477-0520
    DOI 10.1039/d4ob00478g
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top