Lipid biomarkers reveal the trophic plasticity of octocorals along a depth gradient

2021 ◽  
Author(s):  
Chloé Alexandra Pupier ◽  
Miguel Mies ◽  
Maoz Fine ◽  
Ronaldo Bastos Francini‐Filho ◽  
Frederico Pereira Brandini ◽  
...  
Keyword(s):  
Lipid Biomarkers ◽  
Depth Gradient ◽  
Trophic Plasticity

scholarly journals Development of Fatty Acid Reference Ranges and Relationship with Lipid Biomarkers in Middle-Aged Healthy Singaporean Men and Women

Nutrients ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 435
Author(s):  
Cody A. C. Lust ◽  
Xinyan Bi ◽  
Christiani Jeyakumar Henry ◽  
David W. L. Ma
Keyword(s):  
Disease Risk ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Multiple Regression Model ◽  
Dietary Fatty Acids ◽  
Lipid Biomarkers ◽  
Reference Ranges ◽  
Middle Aged ◽  
Serum Samples ◽  
Biologically Relevant

Dietary fatty acids (FA) are essential for overall human health, yet individual FA reference ranges have yet to be established. Developing individual FA reference ranges can provide context to reported concentrations and whether an individual displays deficient, or excess amounts of FA. Reference ranges of sixty-seven individual FA (μmol/L) were profiled and analyzed using gas chromatography with a flame ionization detector from serum samples collected from 476 middle-aged Singaporean males (BMI:23.3 ± 2.9) and females (BMI:21.8 ± 3.6). Measures of triglycerides (TG), high-density lipoprotein (HDL), low-density lipoprotein (LDL), and total cholesterol (TC) (mmol/L) were also collected. The mean FA concentration seen in this cohort (11,458 ± 2478 was similar to that of overweight North American cohorts assessed in past studies. Ten biologically relevant FA were compared between sexes, with females exhibiting significantly higher concentrations in four FA (p < 0.05). A multiple regression model revealed the ten FA contributed significantly to nearly all lipid biomarkers (p < 0.05). A majority of participants who had FA concentrations in the ≥95th percentile also exhibited TG, HDL, LDL, and TC levels in the “high” risk classification of developing cardiovascular disease. Future studies profiling individual FA reference ranges in many unique, global cohorts are necessary to develop cut-off values of individual FA concentrations highly related to disease-risk.

scholarly journals Tracing the Trophic Plasticity of the Coral–Dinoflagellate Symbiosis Using Amino Acid Compound-Specific Stable Isotope Analysis

2021 ◽  
Vol 9 (1) ◽  
pp. 182
Author(s):  
Christine Ferrier-Pagès ◽  
Stephane Martinez ◽  
Renaud Grover ◽  
Jonathan Cybulski ◽  
Eli Shemesh ◽  
...  
Keyword(s):  
Amino Acids ◽  
Essential Role ◽  
Isotope Analysis ◽  
Diagnostic Tools ◽  
Global Changes ◽  
Biosynthetic Pathways ◽  
Trophic Plasticity ◽  
Trophic Index ◽  
Δ15n And Δ13c ◽  
Acid Compound

The association between corals and photosynthetic dinoflagellates is one of the most well-known nutritional symbioses, but nowadays it is threatened by global changes. Nutritional exchanges are critical to understanding the performance of this symbiosis under stress conditions. Here, compound-specific δ15N and δ13C values of amino acids (δ15NAA and δ13CAA) were assessed in autotrophic, mixotrophic and heterotrophic holobionts as diagnostic tools to follow nutritional interactions between the partners. Contrary to what was expected, heterotrophy was mainly traced through the δ15N of the symbiont’s amino acids (AAs), suggesting that symbionts directly profit from host heterotrophy. The trophic index (TP) ranged from 1.1 to 2.3 from autotrophic to heterotrophic symbionts. In addition, changes in TP across conditions were more significant in the symbionts than in the host. The similar δ13C-AAs signatures of host and symbionts further suggests that symbiont-derived photosynthates are the main source of carbon for AAs synthesis. Symbionts, therefore, appear to be a key component in the AAs biosynthetic pathways, and might, via this obligatory function, play an essential role in the capacity of corals to withstand environmental stress. These novel findings highlight important aspects of the nutritional exchanges in the coral–dinoflagellates symbiosis. In addition, they feature δ15NAA as a useful tool for studies regarding the nutritional exchanges within the coral–symbiodiniaceae symbiosis.

scholarly journals Hydrogen isotopic fractionations during syntheses of lipid biomarkers in the seeds of broomcorn millet (Panicum miliaceum L.) under controlled environmental conditions

2021 ◽  
Vol 154 ◽  
pp. 104221
Author(s):  
Jérémy Jacob ◽  
Nicolas Bossard ◽  
Thierry Bariac ◽  
Valery Terwilliger ◽  
Philippe Biron ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Lipid Biomarkers ◽  
Panicum Miliaceum ◽  
Broomcorn Millet

scholarly journals Benthic nitrogen fluxes along a depth gradient in a microtidal fjord: The role of denitrification and microphytobenthos

2004 ◽  
Vol 49 (4) ◽  
pp. 1095-1107 ◽  
Author(s):  
Kristina Sundbäck ◽  
Frank Linares ◽  
Fredrik Larson ◽  
Angela Wulff ◽  
Anna Engelsen
Keyword(s):  
Depth Gradient ◽  
Nitrogen Fluxes

Lipid biomarkers of glioma cell growth arrest and cell death detected by 1 H magic angle spinning MRS

2012 ◽  
Vol 25 (11) ◽  
pp. 1253-1262 ◽  
Author(s):  
Ladan Mirbahai ◽  
Martin Wilson ◽  
Christopher S. Shaw ◽  
Carmel McConville ◽  
Roger D. G. Malcomson ◽  
...  
Keyword(s):  
Cell Death ◽  
Cell Growth ◽  
Glioma Cell ◽  
Growth Arrest ◽  
Magic Angle Spinning ◽  
Lipid Biomarkers ◽  
Magic Angle ◽  
Cell Growth Arrest ◽  
Angle Spinning
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