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Glenn A, Lo K, Jenkins D, Boucher B, Hanley A, Kendall C, Shadyab A, Tinker L, Chessler S, Howard B, Liu S, Sievenpiper J. Greater Adherence to the Portfolio Diet Is Associated with Lower Incidence of Type 2 Diabetes in the Women's Health Initiative. Curr Dev Nutr 2021. [DOI: 10.1093/cdn/nzab053_027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Objectives
To assess the association of the plant-based cholesterol-lowering diet, the Portfolio Diet, with incident type 2 diabetes in women.
Methods
We followed 147,732 postmenopausal women initially free of diabetes in the Women's Health Initiative (WHI) Clinical Trials and Observational Study from 1993 through 2017. Adherence to the Portfolio Diet was assessed using an a priori diet index based on six food categories (high in plant protein [soy & pulses], nuts, viscous fiber, plant sterols and monounsaturated fat, and low in saturated fat) that were previously found to lower cardiovascular risk factors in the Portfolio Diet trials. We used Cox proportional-hazard models to estimate hazard ratios (HRs) and 95% confidence intervals (CI) of the association of adherence to a Portfolio Diet score with incident type 2 diabetes, adjusting for potential confounders (demographics, lifestyle behaviors, and medical history). The Portfolio Diet score was cumulatively assessed at baseline and year three using a validated food frequency questionnaire. Type 2 diabetes diagnosis was ascertained by self-reported medication use.
Results
There were 14,096 cases of incident type 2 diabetes over a mean follow-up of 14.3 years. In the fully adjusted models, adherence to the Portfolio Diet score was associated with a lower risk of incident type 2 diabetes (HR, 0.88, CIs, 0.83, 0.93; P for trend < 0.001), comparing the highest to lowest quartiles of adherence. Results remained similar across subgroup analyses (age, body mass index, family history of diabetes, and ethnicity) and several sensitivity analyses.
Conclusions
Among postmenopausal women, higher adherence to the Portfolio Diet was associated with lower incident type 2 diabetes. These findings are the first to show that the Portfolio Diet may be associated with a lower risk of type 2 diabetes and warrants further investigation.
Funding Sources
The WHI was funded by the National Heart, Lung, and Blood Institute, National Institutes of Health, and the U.S. Department of Health and Human Services. AJG was supported by the Banting & Best Diabetes Centre Tamarack Graduate Award in Diabetes Research, the Peterborough K.M. Hunter Charitable Foundation Graduate Award, and an Ontario Graduate Scholarship. JLS was funded by a Diabetes Canada Clinician Scientist Award.
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Munder A, Israel LL, Kahremany S, Ben-Shabat-Binyamini R, Zhang C, Kolitz-Domb M, Viskind O, Levine A, Senderowitz H, Chessler S, Lellouche JP, Gruzman A. Mimicking Neuroligin-2 Functions in β-Cells by Functionalized Nanoparticles as a Novel Approach for Antidiabetic Therapy. ACS Appl Mater Interfaces 2017; 9:1189-1206. [PMID: 28045486 PMCID: PMC6035049 DOI: 10.1021/acsami.6b10568] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Both pancreatic β-cell membranes and presynaptic active zones of neurons include in their structures similar protein complexes, which are responsible for mediating the secretion of bioactive molecules. In addition, these membrane-anchored proteins regulate interactions between neurons and guide the formation and maturation of synapses. These proteins include the neuroligins (e.g., NL-2) and their binding partners, the neurexins. The insulin secretion and maturation of β-cells is known to depend on their 3-dimensional (3D) arrangement. It was also reported that both insulin secretion and the proliferation rates of β-cells increase when cells are cocultured with clusters of NL-2. Use of full-length NL-2 or even its exocellular domain as potential β-cell functional enhancers is limited by the biostability and bioavailability issues common to all protein-based therapeutics. Thus, based on molecular modeling approaches, a short peptide with the potential ability to bind neurexins was derived from the NL-2 sequence. Here, we show that the NL-2-derived peptide conjugates onto innovative functional maghemite (γ-Fe2O3)-based nanoscale composite particles enhance β-cell functions in terms of glucose-stimulated insulin secretion and protect them under stress conditions. Recruiting the β-cells' "neuron-like" secretory machinery as a target for diabetes treatment use has never been reported before. Such nanoscale composites might therefore provide a unique starting point for designing a novel class of antidiabetic therapeutic agents that possess a unique mechanism of action.
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Affiliation(s)
- Anna Munder
- Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Liron L. Israel
- Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
- Nanomaterials Research Center, Institute of Nanotechnology & Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan, Israel
| | - Shirin Kahremany
- Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Rina Ben-Shabat-Binyamini
- Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
- Nanomaterials Research Center, Institute of Nanotechnology & Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan, Israel
| | - Charles Zhang
- Division of Endocrinology, Diabetes & Metabolism, Department of Medicine, University of California, Irvine, California, United States
| | - Michal Kolitz-Domb
- Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
- Nanomaterials Research Center, Institute of Nanotechnology & Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan, Israel
| | - Olga Viskind
- Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Anna Levine
- The Scientific Equipment Center, Faculty of Biological Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Hanoch Senderowitz
- Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Steven Chessler
- Division of Endocrinology, Diabetes & Metabolism, Department of Medicine, University of California, Irvine, California, United States
| | - Jean-Paul Lellouche
- Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
- Nanomaterials Research Center, Institute of Nanotechnology & Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan, Israel
| | - Arie Gruzman
- Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
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