Summary of Study ST001708

This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench, https://www.metabolomicsworkbench.org, where it has been assigned Project ID PR001093. The data can be accessed directly via it's Project DOI: 10.21228/M8DT31 This work is supported by NIH grant, U2C- DK119886.

See: https://www.metabolomicsworkbench.org/about/howtocite.php

This study contains a large results data set and is not available in the mwTab file. It is only available for download via FTP as data file(s) here.

Study ID	ST001708
Study Title	Oxylipin biosynthesis reinforces cellular senescence through a RAS/p53 feedback loop and allows detection of senolysis
Study Summary	Cellular senescence is a stress or damage response that causes a permanent proliferative arrest and secretion of numerous factors with potent biological activities. This senescence-associated secretory phenotype (SASP) has been characterized largely for secreted proteins that participate in embryogenesis, wound healing, inflammation and many age-related pathologies. By contrast, lipid components of the SASP are understudied. We show that senescent cells activate the biosynthesis of several oxylipins that promote segments of the SASP and reinforce the proliferative arrest. Notably, senescent cells synthesize and accumulate an unstudied intracellular prostaglandin, 1a,1b-dihomo-15-deoxy-delta-12,14-prostaglandin J2. Released 15-deoxy-delta-12,14-prostaglandin J2 is a biomarker of senolysis in culture and in vivo. This and other prostaglandin D2-related lipids promote the senescence arrest and SASP by activating RAS signaling. These data identify an important aspect of cellular senescence and a method to detect senolysis
Institute	Buck Institute for Research on Aging
Last Name	Sharma
First Name	Rishi
Address	8001 Redwood Blvd, Novato, CA, 94945, USA
Email	sharmarishi2004@yahoo.co.in
Phone	5084392367
Submit Date	2021-02-20
Raw Data Available	Yes
Raw Data File Type(s)	d
Analysis Type Detail	LC-MS
Release Date	2021-08-10
Release Version	1

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Sample Preparation:

Sampleprep ID:	SP001791
Sampleprep Summary:	Protocol for Lipid Extraction (10.24.2019) Lipid Biomarker for Senolysis Study 1. 80% MeOH was added to each sample 500µL to plasma samples 100µL to urine sample 2. Transfer the contents to 9 mL glass tube and add 1.0 mL of CHCl3 (containing 200 ng/mL FA 17:0 Saturated). Vortex mix for 5 minutes. 3. Place the glass tube into a 15mL polypropylene culture tube with Kimi wipes inserted at bottom as a cushion. Wrap the culture tube with paraffin and place in centrifuge. This will prevent glass tube being shattered in the centrifuge. 4. Centrifuge at 4°C for 10 minutes 3000rpm. 5. After spinning there will be two distinct layers, the top layer is the aqueous layer containing the aqueous metabolites (80% MeOH) and bottom layer which contains lipids. 6. Transfer the lower layer into 1.5ml vials. 7. Transfer from the 1.5mL tube the exact amount of each sample into the MS/HPLC glass vial and dry down using nitrogen gas. 8. Reconstitute the lipids with 80µL chloroform. 9. Transfer upper layer (metabolites) into labeled vials and store at -80°C, if possible. Samples stored in -80°C. Sample volume submitted -Plasma samples=50µL Urine samples= 10µL Sample volume in each vial- Plasma samples µL and Urine samples µL -submitted to mass spec All samples were split in half ½ given to CW for further testing other 1/2 in -80°C

Sampleprep ID:

SP001791

Sampleprep Summary:

Protocol for Lipid Extraction (10.24.2019) Lipid Biomarker for Senolysis Study 1. 80% MeOH was added to each sample 500µL to plasma samples 100µL to urine sample 2. Transfer the contents to 9 mL glass tube and add 1.0 mL of CHCl3 (containing 200 ng/mL FA 17:0 Saturated). Vortex mix for 5 minutes. 3. Place the glass tube into a 15mL polypropylene culture tube with Kimi wipes inserted at bottom as a cushion. Wrap the culture tube with paraffin and place in centrifuge. This will prevent glass tube being shattered in the centrifuge. 4. Centrifuge at 4°C for 10 minutes 3000rpm. 5. After spinning there will be two distinct layers, the top layer is the aqueous layer containing the aqueous metabolites (80% MeOH) and bottom layer which contains lipids. 6. Transfer the lower layer into 1.5ml vials. 7. Transfer from the 1.5mL tube the exact amount of each sample into the MS/HPLC glass vial and dry down using nitrogen gas. 8. Reconstitute the lipids with 80µL chloroform. 9. Transfer upper layer (metabolites) into labeled vials and store at -80°C, if possible. Samples stored in -80°C. Sample volume submitted -Plasma samples=50µL Urine samples= 10µL Sample volume in each vial- Plasma samples µL and Urine samples µL -submitted to mass spec All samples were split in half ½ given to CW for further testing other 1/2 in -80°C