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Authors = Mensiena B. G. Kiewiet

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11 pages, 1299 KiB  
Project Report
Towards Next-Generation Sequencing (NGS)-Based Newborn Screening: A Technical Study to Prepare for the Challenges Ahead
by Abigail Veldman, Mensiena B. G. Kiewiet, Margaretha Rebecca Heiner-Fokkema, Marcel R. Nelen, Richard J. Sinke, Birgit Sikkema-Raddatz, Els Voorhoeve, Dineke Westra, Martijn E. T. Dollé, Peter C. J. I. Schielen and Francjan J. van Spronsen
Int. J. Neonatal Screen. 2022, 8(1), 17; https://doi.org/10.3390/ijns8010017 - 24 Feb 2022
Cited by 27 | Viewed by 6349
Abstract
Newborn screening (NBS) aims to identify neonates with severe conditions for whom immediate treatment is required. Currently, a biochemistry-first approach is used to identify these disorders, which are predominantly inherited meta1bolic disorders (IMD). Next-generation sequencing (NGS) is expected to have some advantages over [...] Read more.
Newborn screening (NBS) aims to identify neonates with severe conditions for whom immediate treatment is required. Currently, a biochemistry-first approach is used to identify these disorders, which are predominantly inherited meta1bolic disorders (IMD). Next-generation sequencing (NGS) is expected to have some advantages over the current approach, for example the ability to detect IMDs that meet all screening criteria but lack an identifiable biochemical footprint. We have now designed a technical study to explore the use of NGS techniques as a first-tier approach in NBS. Here, we describe the aim and set-up of the NGS-first for the NBS (NGSf4NBS) project, which will proceed in three steps. In Step 1, we will identify IMDs eligible for NGS-first testing, based on treatability. In Step 2, we will investigate the feasibility, limitations and comparability of different technical NGS approaches and analysis workflows for NBS, eventually aiming to develop a rapid NGS-based workflow. Finally, in Step 3, we will prepare for the incorporation of this workflow into the existing Dutch NBS program and propose a protocol for referral of a child after a positive NGS test result. The results of this study will be the basis for an additional analytical route within NBS that will be further studied for its applicability within the NBS program, e.g., regarding the ethical, legal, financial and social implications. Full article
(This article belongs to the Special Issue Next Generation Sequencing (NGS) in Newborn Screening)
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22 pages, 2551 KiB  
Review
Immunomodulatory Protein Hydrolysates and Their Application
by Mensiena B. G. Kiewiet, Marijke M. Faas and Paul De Vos
Nutrients 2018, 10(7), 904; https://doi.org/10.3390/nu10070904 - 14 Jul 2018
Cited by 94 | Viewed by 14769
Abstract
Immunomodulatory protein hydrolysate consumption may delay or prevent western immune-related diseases. In order to purposively develop protein hydrolysates with an optimal and reproducible immunomodulatory effect, knowledge is needed on which components in protein hydrolysates are responsible for the immune effects. Important advances have [...] Read more.
Immunomodulatory protein hydrolysate consumption may delay or prevent western immune-related diseases. In order to purposively develop protein hydrolysates with an optimal and reproducible immunomodulatory effect, knowledge is needed on which components in protein hydrolysates are responsible for the immune effects. Important advances have been made on this aspect. Also, knowledge on mechanisms underlying the immune modulating effects is indispensable. In this review, we discuss the most promising application possibilities for immunomodulatory protein hydrolysates. In order to do so, an overview is provided on reported in vivo immune effects of protein hydrolysates in both local intestinal and systemic organs, and the current insights in the underlying mechanisms of these effects. Furthermore, we discuss current knowledge and physicochemical approaches to identify the immune active protein sequence(s). We conclude that multiple hydrolysate compositions show specific immune effects. This knowledge can improve the efficacy of existing hydrolysate-containing products such as sports nutrition, clinical nutrition, and infant formula. We also provide arguments for why immunomodulatory protein hydrolysates could be applied to manage the immune response in the increasing number of individuals with a higher risk of immune dysfunction due to, for example, increasing age or stress. Full article
(This article belongs to the Special Issue Diet and Immune Function)
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