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  • 1
    In: Frontiers in Microbiology, Frontiers Media SA, Vol. 12 ( 2021-4-7)
    Abstract: Cesarean-delivered (CD) infants harbor a distinct gut microbiome from vaginally delivered (VD) infants, however, during infancy, the most important driver of infant gut microbial colonization is infant feeding. Earlier studies have shown that breastfeeding is associated with higher levels of health-promoting bacteria such and Bifidobacterium and Bacteroides via modulation of the immune system, and production of metabolites. As the infant gut matures and solid foods are introduced, it is unclear whether longer duration of breast feeding restore loss of beneficial taxa within the intestinal microbiota of operatively delivered infants. Within the New Hampshire Birth Cohort Study, we evaluated the longitudinal effect of delivery mode and infant feeding on the taxonomic composition and functional capacity of developing gut microbiota in the First year of life. Microbiota of 500 stool samples collected between 6 weeks and 12 months of age (from 229 infants) were characterized by 16S ribosomal RNA sequencing. Shotgun metagenomic sequencing was also performed on 350 samples collected at either 6 weeks or 12 months of age. Among infant participants, 28% were cesarean-delivered (CD) infants and most (95%) initiated breastfeeding within the first six months of life, with 26% exclusively breastfed and 69% mixed-fed (breast milk and formula), in addition to complementary foods by age 1. Alpha (within-sample) diversity was significantly lower in CD infants compared to vaginally delivered (VD) infants ( P & lt; 0.05) throughout the study period. Bacterial community composition clustering by both delivery mode and feeding duration at 1 year of age revealed that CD infants who were breast fed for & lt; 6 months were more dissimilar to VD infants than CD infants who breast fed for ≥ 6 months. We observed that breastfeeding modified the longitudinal impact of delivery mode on the taxonomic composition of the microbiota by 1 year of age, with an observed increase in abundance of Bacteroides fragilis and Lactobacillus with longer duration of breastfeeding among CD infants while there was an increase in Faecalibacterium for VD infants. Our findings confirm that duration of breastfeeding plays a critical role in restoring a health-promoting microbiome, call for further investigations regarding the association between breast milk exposure and health outcomes in early life.
    Type of Medium: Online Resource
    ISSN: 1664-302X
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
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  • 2
    In: Diabetes Care, American Diabetes Association, Vol. 43, No. 1 ( 2020-01-01), p. e1-e2
    Type of Medium: Online Resource
    ISSN: 0149-5992 , 1935-5548
    Language: English
    Publisher: American Diabetes Association
    Publication Date: 2020
    detail.hit.zdb_id: 1490520-6
    detail.hit.zdb_id: 441231-X
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  • 3
    In: MicrobiologyOpen, Wiley, Vol. 9, No. 5 ( 2020-05)
    Abstract: With the emergence of large‐scale epidemiologic human microbiome studies, there is a need to understand the reproducibility of microbial DNA sequencing and the impact of specimen collection and processing methods on measures of microbial community composition and structure, with reproducibility studies in infants and young children particularly lacking. Here, we examined batch‐to‐batch variability and reliability of collection, handling, and processing protocols, testing replicate stool samples from infants and young children using Illumina MiSeq sequencing of the bacterial 16S rRNA gene V4‐V5 hypervariable region, evaluating 33 conditions with different protocols and extraction methods. We detected no evidence of batch effects in replicate DNA samples or extractions from the same stool sample. Variability in DNA yield and alpha diversity was observed between the different collection, handling, and processing protocols. However, across all protocols, subject variability was the dominant contributor to microbiome structure, with comparatively little impact of the protocol used. While collection method and DNA extraction kit may affect DNA yield, and correspondingly alpha diversity, our findings suggest that characterization of the structure and composition of the fecal microbiome of infants and young children are reliably measurable by standardized collection, handling, and processing protocols and DNA extraction methods within an individual longitudinal study.
    Type of Medium: Online Resource
    ISSN: 2045-8827 , 2045-8827
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2020
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  • 4
    In: Radiology, Radiological Society of North America (RSNA), Vol. 304, No. 2 ( 2022-08), p. 450-459
    Type of Medium: Online Resource
    ISSN: 0033-8419 , 1527-1315
    RVK:
    Language: English
    Publisher: Radiological Society of North America (RSNA)
    Publication Date: 2022
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    detail.hit.zdb_id: 2010588-5
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  • 5
    In: Diabetes Care, American Diabetes Association, Vol. 43, No. 4 ( 2020-04-01), p. 806-812
    Abstract: To evaluate the contemporary prevalence of diabetic peripheral neuropathy (DPN) in participants with type 1 diabetes in the T1D Exchange Clinic Registry throughout the U.S. RESEARCH DESIGN AND METHODS DPN was assessed with the Michigan Neuropathy Screening Instrument Questionnaire (MNSIQ) in adults with ≥5 years of type 1 diabetes duration. A score of ≥4 defined DPN. Associations of demographic, clinical, and laboratory factors with DPN were assessed. RESULTS Among 5,936 T1D Exchange participants (mean ± SD age 39 ± 18 years, median type 1 diabetes duration 18 years [interquartile range 11, 31], 55% female, 88% non-Hispanic white, mean glycated hemoglobin [HbA1c] 8.1 ± 1.6% [65.3 ± 17.5 mmol/mol]), DPN prevalence was 11%. Compared with those without DPN, DPN participants were older, had higher HbA1c, had longer duration of diabetes, were more likely to be female, and were less likely to have a college education and private insurance (all P & lt; 0.001). DPN participants also were more likely to have cardiovascular disease (CVD) (P & lt; 0.001), worse CVD risk factors of smoking (P = 0.008), hypertriglyceridemia (P = 0.002), higher BMI (P = 0.009), retinopathy (P = 0.004), reduced estimated glomerular filtration rate (P = 0.02), and Charcot neuroarthropathy (P = 0.002). There were no differences in insulin pump or continuous glucose monitor use, although DPN participants were more likely to have had severe hypoglycemia (P = 0.04) and/or diabetic ketoacidosis (P & lt; 0.001) in the past 3 months. CONCLUSIONS The prevalence of DPN in this national cohort with type 1 diabetes is lower than in prior published reports but is reflective of current clinical care practices. These data also highlight that nonglycemic risk factors, such as CVD risk factors, severe hypoglycemia, diabetic ketoacidosis, and lower socioeconomic status, may also play a role in DPN development.
    Type of Medium: Online Resource
    ISSN: 0149-5992 , 1935-5548
    Language: English
    Publisher: American Diabetes Association
    Publication Date: 2020
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    detail.hit.zdb_id: 441231-X
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  • 6
    Online Resource
    Online Resource
    MDPI AG ; 2024
    In:  Microorganisms Vol. 12, No. 5 ( 2024-04-27), p. 879-
    In: Microorganisms, MDPI AG, Vol. 12, No. 5 ( 2024-04-27), p. 879-
    Abstract: Bifidobacterium infantis are the primary colonizers of the infant gut, yet scientific research addressing the transmission of the genus Bifidobacterium to infants remains incomplete. This review examines microbial reservoirs of infant-type Bifidobacterium that potentially contribute to infant gut colonization. Accordingly, strain inheritance from mother to infant via the fecal-oral route is likely contingent on the bifidobacterial strain and phenotype, whereas transmission via the vaginal microbiota may be restricted to Bifidobacterium breve. Additional reservoirs include breastmilk, horizontal transfer from the environment, and potentially in utero transfer. Given that diet is a strong predictor of Bifidobacterium colonization in early life and the absence of Bifidobacterium is observed regardless of breastfeeding, it is likely that additional factors are responsible for bifidobacterial colonization early in life.
    Type of Medium: Online Resource
    ISSN: 2076-2607
    Language: English
    Publisher: MDPI AG
    Publication Date: 2024
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  • 7
    Online Resource
    Online Resource
    Ovid Technologies (Wolters Kluwer Health) ; 2022
    In:  Journal of Physical Therapy Education Vol. 36, No. 1 ( 2022-03), p. 76-86
    In: Journal of Physical Therapy Education, Ovid Technologies (Wolters Kluwer Health), Vol. 36, No. 1 ( 2022-03), p. 76-86
    Abstract: Anxiety, depression, and burnout are being discussed across health professions. Despite rising concern, studies investigating stress in students enrolled in Doctor of Physical Therapy (DPT) programs remain limited. Only recently have studies exploring stress in DPT students surfaced with any consistency. In this study, our aim was to elucidate the self-identified challenges first-year DPT students faced, how they reacted, and what they did to manage them. Review of the Literature. Evidence suggests that DPT students, like other health professional students, report high levels of anxiety. Despite rising concern, studies investigating the impact of stress on DPT students remain limited. This concern also raises the question of the role of health professions educators in helping students develop the coping strategies needed to manage stress. Programs across the health professions have been proffered to address student stress; however, limited data exist to effectively guide educators. From the insights gained, we offer recommendations linked to the emic or student perspective that may help educators facilitate adaptive coping skills in their learners. Subjects. Participants included first-year DPT students from 3 private universities. Methods. A critical incident questionnaire was used to capture the student experience. Narratives were submitted electronically. Responses were deidentified, and researchers were blinded to participation. An inductive interpretivist approach was used to analyze the data. Strategies to ensure trustworthiness included prolonged engagement, triangulation of investigators, and peer review. Results. Eighty-two first-year DPT students responded; 70 complete responses were analyzed. Three major themes were identified: 1) first-year DPT students faced academic, personal, and mixed challenges; 2) challenges evoked a range of negatively charged emotions; and 3) students relied on adaptive and some potentially maladaptive personal characteristics, behaviors, and strategies to manage their challenges. Discussion and Conclusion. First-year DPT students face many of the same challenges as other health professional students. Most successfully navigated their challenges, however, not without some degree of emotion. As educators, we must prepare students to develop the coping strategies needed to manage not only current academic stressors but ultimately the stressors inherent in clinical practice. Toward that end, we offer recommendations, linked to the emic perspective obtained, that may help educators facilitate adaptive coping skills in their learners.
    Type of Medium: Online Resource
    ISSN: 1938-3533
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2022
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  • 8
    In: Molecular Nutrition & Food Research, Wiley, Vol. 67, No. 11 ( 2023-06)
    Abstract: Fucosylated human milk oligosaccharides (fHMOs) are metabolized by Bifidobacterium infantis and promote syntrophic interactions between microbiota that colonize the infant gut. The role of fHMO structure on syntrophic interactions and net microbiome function is not yet fully understood. Methods and results Metabolite production and microbial populations are tracked during mono‐ and co‐culture fermentations of 2ʹfucosyllactose (2ʹFL) and difucosyllactose (DFL) by two B. infantis strains and Eubacterium hallii . This is also conducted in an in vitro modeled microbiome supplemented by B. infantis and/or E. hallii . Metabolites are quantified by high performance liquid chromatography. Total B. infantis and E. hallii populations are quantified through qRT‐PCR and community composition through 16S amplicon sequencing. Differential metabolism of 2ʹFL and DFL by B. infantis strains gives rise to strain‐ and fHMO structure‐specific syntrophy with E. hallii . Within the modeled microbial community, fHMO structure does not strongly alter metabolite production in aggregate, potentially due to functional redundancy within the modeled community. In contrast, community composition is dependent on fHMO structure. Conclusion Whereas short chain fatty acid production is not significantly altered by the specific fHMO structure introduced to the modeled community, specific fHMO structure influences the composition of the gut microbiome.
    Type of Medium: Online Resource
    ISSN: 1613-4125 , 1613-4133
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2023
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    detail.hit.zdb_id: 2160372-8
    SSG: 12
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  • 9
    In: Cancers, MDPI AG, Vol. 13, No. 11 ( 2021-05-30), p. 2696-
    Abstract: Secreted frizzled-related protein 2 (SFRP2) promotes the migration/invasion of metastatic osteosarcoma (OS) cells and tube formation by endothelial cells. However, its function on T-cells is unknown. We hypothesized that blocking SFRP2 with a humanized monoclonal antibody (hSFRP2 mAb) can restore immunity by reducing CD38 and PD-1 levels, ultimately overcoming resistance to PD-1 inhibitors. Treating two metastatic murine OS cell lines in vivo, RF420 and RF577, with hSFRP2 mAb alone led to a significant reduction in the number of lung metastases, compared to IgG1 control treatment. While PD-1 mAb alone had minimal effect, hSFRP2 mAb combination with PD-1 mAb had an additive antimetastatic effect. This effect was accompanied by lower SFRP2 levels in serum, lower CD38 levels in tumor-infiltrating lymphocytes and T-cells, and lower PD-1 levels in T-cells. In vitro data confirmed that SFRP2 promotes NFATc3, CD38 and PD-1 expression in T-cells, while hSFRP2 mAb treatment counteracts these effects and increases NAD+ levels. hSFRP2 mAb treatment further rescued the suppression of T-cell proliferation by tumor cells in a co-culture model. Finally, hSFRP2 mAb induced apoptosis in RF420 and RF577 OS cells but not in T-cells. Thus, hSFRP2 mAb therapy could potentially overcome PD-1 inhibitor resistance in metastatic osteosarcoma.
    Type of Medium: Online Resource
    ISSN: 2072-6694
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
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  • 10
    In: Endocrine Reviews, The Endocrine Society, Vol. 42, No. 3 ( 2021-05-25), p. 219-258
    Abstract: In May 2014, the National Institutes of Health (NIH) stated its intent to “require applicants to consider sex as a biological variable (SABV) in the design and analysis of NIH-funded research involving animals and cells.” Since then, proposed research plans that include animals routinely state that both sexes/genders will be used; however, in many instances, researchers and reviewers are at a loss about the issue of sex differences. Moreover, the terms sex and gender are used interchangeably by many researchers, further complicating the issue. In addition, the sex or gender of the researcher might influence study outcomes, especially those concerning behavioral studies, in both animals and humans. The act of observation may change the outcome (the “observer effect”) and any experimental manipulation, no matter how well-controlled, is subject to it. This is nowhere more applicable than in physiology and behavior. The sex of established cultured cell lines is another issue, in addition to aneuploidy; chromosomal numbers can change as cells are passaged. Additionally, culture medium contains steroids, growth hormone, and insulin that might influence expression of various genes. These issues often are not taken into account, determined, or even considered. Issues pertaining to the “sex” of cultured cells are beyond the scope of this Statement. However, we will discuss the factors that influence sex and gender in both basic research (that using animal models) and clinical research (that involving human subjects), as well as in some areas of science where sex differences are routinely studied. Sex differences in baseline physiology and associated mechanisms form the foundation for understanding sex differences in diseases pathology, treatments, and outcomes. The purpose of this Statement is to highlight lessons learned, caveats, and what to consider when evaluating data pertaining to sex differences, using 3 areas of research as examples; it is not intended to serve as a guideline for research design.
    Type of Medium: Online Resource
    ISSN: 0163-769X , 1945-7189
    Language: English
    Publisher: The Endocrine Society
    Publication Date: 2021
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    detail.hit.zdb_id: 603096-8
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