Abstract:
:The islet amyloid polypeptide (IAPP) or amylin maintains a key role in metabolism. This 37-residues-peptide could form pancreatic amyloids, which are a characteristic feature of diabetes mellitus type 2. However, some species do not form amyloid fibril structures. By employing a biomimetic approach, we generated an extensive panel of optimized sequences of IAPP, which could drastically reduce aggregation propensity. A structural and cellular characterization analysis was performed on the C-terminal domain with the highest aggregation propensity. This allowed the observation of an aggregative phenomenon dependent of the lipid environment. Evaluation of the new F23R variant demonstrated inhibition of β-sheet structure and, therefore, amyloid formation on the native C-terminal, phenomenon that was associated with functional optimization in calcium and cholesterol management coupled with the optimization of insulin secretion by beta cells. When F23R variant was evaluated in microglia cells, a model of amyloidosis, cytotoxic conditions were not registered. In addition, it was found that C-terminal sequences of IAPP could modulate cholesterol metabolism in hepatocytes through regulation of SREBP-2, apoA-1, ABCA1, and LDLR, mechanism that may represent a new function of IAPP on the metabolism of cholesterol, increasing the LDL endocytosis in hepatocytes. Optimized sequences with only one residue modification in the C-terminal core aggregation could diminish β-sheet formation and represent a novel strategy adaptable to other pharmacological targets. Our data suggest a new IAPP function associated with rearrangements on metabolism of cholesterol in hepatocytes.
journal_name
Front Endocrinol (Lausanne)journal_title
Frontiers in endocrinologyauthors
Pulido-Capiz A,Díaz-Molina R,Martínez-Navarro I,Guevara-Olaya LA,Casanueva-Pérez E,Mas-Oliva J,Rivero IA,García-González Vdoi
10.3389/fendo.2018.00331subject
Has Abstractpub_date
2018-06-25 00:00:00pages
331issn
1664-2392journal_volume
9pub_type
杂志文章abstract::Introduction: Secondary hyperparathyroidism (sHPT) is a common hormonal complication of chronic kidney disease. There are several therapeutic options for sHPT management aiming at calcium-phosphorus balance normalization and decrease of parathormone secretion. Objectives: The aim of this retrospective, observational s...
journal_title:Frontiers in endocrinology
pub_type: 杂志文章
doi:10.3389/fendo.2019.00040
更新日期:2019-02-05 00:00:00
abstract::The human lutropin (hLH)/choriogonadotropin (hCG) receptor (LHCGR) can be activated by binding two slightly different gonadotropic glycoprotein hormones, choriogonadotropin (CG) - secreted by the placenta, and lutropin (LH) - produced by the pituitary. They induce different signaling profiles at the LHCGR. This cannot...
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pub_type: 杂志文章
doi:10.3389/fendo.2015.00140
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journal_title:Frontiers in endocrinology
pub_type: 杂志文章
doi:10.3389/fendo.2012.00121
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abstract::The world-wide obesity epidemic constitutes a severe threat to human health and wellbeing and poses a major challenge to health-care systems. Current therapeutic approaches, relying mainly on reduced energy intake and/or increased exercise energy expenditure, are generally of limited effectiveness. Previously believed...
journal_title:Frontiers in endocrinology
pub_type: 杂志文章
doi:10.3389/fendo.2011.00086
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abstract::Adrenocorticotropic hormone (ACTH), and α-, β-, and γ-melanocyte-stimulating hormones (α-, β-, γ-MSH), collectively known as melanocortins, together with their receptors (melanocortin receptors), are components of an ancient modulatory system. The clinical use of ACTH in the treatment of rheumatoid arthritis started i...
journal_title:Frontiers in endocrinology
pub_type: 杂志文章,评审
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abstract::Successful discontinuation of cabergoline (CAB) treatment has been reported in 31-75% of prolactinomas patients treated for at least 2 years. In contrast, it is not well established whether CAB therapy can be successfully withdrawn after a failed first attempt. This prospective open trial was designed to address this ...
journal_title:Frontiers in endocrinology
pub_type: 杂志文章
doi:10.3389/fendo.2015.00011
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journal_title:Frontiers in endocrinology
pub_type: 杂志文章
doi:10.3389/fendo.2012.00031
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abstract::Diabetes is a worldwide public health concern as it is associated with various complications. One of the major complications of diabetes is diabetic foot syndrome that results in catastrophic events such as ulceration and amputation. Therefore, the main four strategies of diabetic foot care involve risk prediction, pr...
journal_title:Frontiers in endocrinology
pub_type: 杂志文章,评审
doi:10.3389/fendo.2020.00308
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journal_title:Frontiers in endocrinology
pub_type: 杂志文章,评审
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journal_title:Frontiers in endocrinology
pub_type: 杂志文章
doi:10.3389/fendo.2018.00722
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abstract::Background: Carney complex (CNC) is a rare multiple endocrine neoplasia syndrome with autosomal dominant inheritance. Affected individuals present with mucocutaneous lentigines/blue nevi, cardiac and noncardiac myxomatous tumors, and multiple endocrine tumors. Mutations in PRKAR1A have been identified as genetic cause...
journal_title:Frontiers in endocrinology
pub_type:
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abstract::The plasticity of the individual epigenetic landscape that goes to countless rearrangements throughout life is closely the reflection of environmental factors such as chemical exposure, socio-economic status and nutrient intakes both early and late in life. The Mini Nutritional Assessment (MNA) is a well-validated too...
journal_title:Frontiers in endocrinology
pub_type: 杂志文章
doi:10.3389/fendo.2019.00672
更新日期:2019-10-01 00:00:00
abstract::Older women with type 2 diabetes mellitus (DM) have higher bone mineral density (BMD) but also have higher rates of fracture compared to those without DM. Limited evidence suggests that DM may also be associated with more rapid bone loss. To determine if bone loss rates differ by DM status in older women, we analyzed ...
journal_title:Frontiers in endocrinology
pub_type: 杂志文章
doi:10.3389/fendo.2013.00062
更新日期:2013-05-30 00:00:00
abstract::Although the pathogenesis of Polycystic Ovary Syndrome (PCOS) is still unclear, the disturbance of hypothalamic-pituitary-gonadal (HPG) axis is suspected to be the main culprit in the development of PCOS. Kisspeptin, a hypothalamic peptide encoded by the KISS1 gene, is widely reported as a key factor in the regulation...
journal_title:Frontiers in endocrinology
pub_type: 杂志文章,评审
doi:10.3389/fendo.2019.00298
更新日期:2019-05-10 00:00:00
abstract:Background:Many studies suggest that the small ubiquitin-like modifier 4 (SUMO4) M55V gene polymorphism (rs237025) may be associated with an increased risk of type 2 diabetes mellitus (T2DM). However, due to other conflicting results, a clear consensus is lacking in the matter. Objective and methods:A meta-analysis co...
journal_title:Frontiers in endocrinology
pub_type: 杂志文章
doi:10.3389/fendo.2017.00303
更新日期:2017-11-02 00:00:00
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journal_title:Frontiers in endocrinology
pub_type: 杂志文章
doi:10.3389/fendo.2020.00254
更新日期:2020-04-23 00:00:00
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journal_title:Frontiers in endocrinology
pub_type: 杂志文章
doi:10.3389/fendo.2020.00124
更新日期:2020-03-12 00:00:00
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pub_type: 杂志文章,评审
doi:10.3389/fendo.2020.00516
更新日期:2020-08-11 00:00:00
abstract::[This corrects the article DOI: 10.3389/fendo.2017.00018.]. ...
journal_title:Frontiers in endocrinology
pub_type: 杂志文章,已发布勘误
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pub_type: 杂志文章,评审
doi:10.3389/fendo.2020.00502
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journal_title:Frontiers in endocrinology
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doi:10.3389/fendo.2018.00745
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journal_title:Frontiers in endocrinology
pub_type: 杂志文章,评审
doi:10.3389/fendo.2014.00159
更新日期:2014-10-07 00:00:00
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journal_title:Frontiers in endocrinology
pub_type: 杂志文章,评审
doi:10.3389/fendo.2018.00074
更新日期:2018-03-20 00:00:00
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journal_title:Frontiers in endocrinology
pub_type:
doi:10.3389/fendo.2018.00083
更新日期:2018-03-09 00:00:00
abstract:Objective:To analyze association between different perioperative glycemic control strategies and postoperative outcomes in patients with diabetes undergoing cardiac surgery. Methods:MEDLINE, Cochrane Library, Web of Science, EMBASE, Wanfang Data, China National Knowledge Infrastructure (CNKI) and China Biology Medicin...
journal_title:Frontiers in endocrinology
pub_type:
doi:10.3389/fendo.2020.513073
更新日期:2020-12-17 00:00:00
abstract::Human phosphodiesterases (PDEs) comprise a complex superfamily of enzymes derived from 24 genes separated into 11 PDE gene families (PDEs 1-11), expressed in different tissues and cells, including heart and brain. The isoforms PDE4, PDE7, and PDE8 are specific for the second messenger cAMP, which is responsible for me...
journal_title:Frontiers in endocrinology
pub_type: 杂志文章,评审
doi:10.3389/fendo.2019.00141
更新日期:2019-03-19 00:00:00
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journal_title:Frontiers in endocrinology
pub_type: 杂志文章
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pub_type: 杂志文章
doi:10.3389/fendo.2020.00438
更新日期:2020-08-14 00:00:00
abstract::Primary small cell carcinoma of the breast (SCCB) is a rare tumor subtype comprising <0.1% of all breast carcinomas. Here we present a case of thyroid transcription factor-1 (TTF-1) positive SCCB that recurred within 3 years of diagnosis in the lung and lymph nodes. Given the small number of cases, no clear guidelines...
journal_title:Frontiers in endocrinology
pub_type:
doi:10.3389/fendo.2020.00228
更新日期:2020-04-29 00:00:00