Agilent Technologies Seahorse XFp User manual

Agilent Technologies
Agilent Seahorse XFp
Glycolytic Rate Assay Kit
User Guide
Kit 103346-100

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Manual Part Number
103346-400
Kit Part Number
103346-100
Edition
Second edition, May 2019
Revision B0
Printed in USA
Agilent Technologies, Inc.
2850 Centerville Road 
Wilmington, DE 19808-1610 USA
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Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide 3
Contents
Introduction
Assay Background 5
Glossary 9
Kit Information
Kit Contents 11
Kit Shipping and Storage 11
Additional Required Items 12
Assay Workflow
Day Prior to Assay 14
Day of Assay 14
Running the Assay 18
Analysis Using the Agilent Seahorse Glycolytic Rate Assay Report
Generator 19
Frequently Asked Questions

4 Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide

5
Agilent Seahorse XFp Glycolytic Rate Assay Kit
User Guide
Agilent Technologies
1
Introduction
Assay Background 5
Glossary 9
Assay Background
For use with an Agilent Seahorse XFp Extracellular Flux
Analyzer.
The Agilent Seahorse XFp Glycolytic Rate Assay is an accurate
and reliable method for measuring glycolysis in cells. Together
with a Seahorse XFp Analyzer, the Seahorse XFp Glycolytic
Rate Assay provides accurate measurements of glycolytic rates
for basal conditions and compensatory glycolysis following
mitochondrial inhibition (see Figure 1 on page 6). The
calculated rates accounts for contribution of CO2to
extracellular acidification derived from mitochondrial/TCA
cycle activity, and are directly comparable to lactate
accumulation data.

6 Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide
Introduction
Seahorse XF Analyzers directly measure real time extracellular
acidification rate (ECAR) and oxygen consumption rate (OCR)
of cells - indicators of the two major energy-producing
pathways: glycolysis and oxidative phosphorylation. Most cells
possess the ability to switch between these two pathways,
thereby adapting to changes in their environment. To measure
glycolytic rates, Seahorse XF Glycolytic Rate Assay utilizes both
ECAR and OCR measurements to determine the glycolytic
proton efflux rate (glycoPER) of the cells (defined below).
Glucose in cells is converted to pyruvate, and then converted to
lactate in the cytoplasm, or to CO2and water in the
mitochondria. The conversion of glucose to lactate results in a
net production and extrusion of protons into the extracellular
medium. (See Figure 2 on page 8.)

Cells may also use glucose and the other fuels present within
Figure 1 Agilent Seahorse XFp Glycolytic rate assay profile.
Proton efflux from live cells comprises both glycolytic and
mitochondrial-derived acidification. Inhihbition of
mitochondrial function by Rotenone and Antimycin A
(Rot/AA) enables calculation of mitochondrial-associated
acidification. Subtraction of mitochondrial acidification to Total
Proton Efflux Rate results in Glycolytic Proton Efflux Rate.

Introduction
Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide 7
the cell or in the assay medium for energy production through
mitochondrial respiration. Mitochondrial-derived CO2can
partially hydrate in the extracellular medium, resulting in
additional extracellular acidification beyond that contributed
by glycolysis. By also measuring the amount of oxygen
consumed by the cell, the contribution of mitochondria/CO2to
extracellular acidification is calculated and used to subtract the
CO2contributing acidification from the total Proton Efflux Rate
(PER). (For a detailed explanation, please read the Agilent
Seahorse XF CO2Contribution Factor Protocol User Guide).
The resulting value, glycoPER, is the rate of protons extruded
into the extracellular medium during glycolysis. This assay
allows for real-time measurements of changes in glycolysis rates
that may go undetected in long-term lactate accumulation
assays.
The assay workflow is as follows: first, cells are incubated in the
Seahorse XF Glycolytic Rate Assay Medium containing
substrates such as glucose, glutamine and pyruvate, as well as
HEPES buffer, and basal rates are recorded over 3 measurement
periods. Next, Rot/AA (inhibitors of mitochondrial electron
transport chain) are injected to inhibit mitochondrial oxygen
consumption (and therefore CO2- derived protons). The second
injection is 2-deoxy-D-glucose (2-DG), a glucose analog which
inhibits glycolysis through competitive binding of glucose
hexokinase, the first enzyme in the glycolytic pathway. The
resulting decrease in PER provides qualitative confirmation
that the PER produced prior to the injection is primarily due to
glycolysis.

8 Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide
Introduction
Figure 2 Principle of the Agilent Seahorse XFp Glycolytic Rate Assay.
Energy is produced by two pathways in the cell - glycolysis,
and mitochondrial respiration. In the breakdown of glucose to
lactate during glycolysis, protons are extruded into the
extracellular media which is detected by the XFp Analyzer as
ECAR. Additionally, mitochondrial TCA activity produces CO2,
which hydrates and acidifies the media. By inhibiting
respiration (OCR) during the assay with the complex I and
complex III mitochondrial inhibitors (Rot/AA), the rate of
proton efflux from respiration can be calculated and removed
from the total proton efflux rate, giving the glycolytic proton
efflux rate (glycoPER). To confirm pathway specificity, 2-DG, an
inhbitor of glycolysis is injected to stop glycolytic acidfication.

Introduction
Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide 9
Glossary
• Glycolysis: In the context of the Seahorse XFp Glycolytic
Rate Assay, the process of converting glucose to lactate.
• Buffer factor (BF): Buffer capacity of the measurement
system, comprising the assay medium and XF assay
conditions (instrument, sensor, labware).
• Proton efflux rate (PER): The number of protons exported
by cells into the assay medium over time, expressed as
pmol/min.
• Glycolytic proton efflux rate (glycoPER): The Proton
Efflux rate derived from glycolysis (discounting the effect of
CO2-dependent acidification). This measurement is highly
correlated with the extracellular lactate production rate.
• Compensatory glycolysis: The rate of glycolysis in cells
following the addition of mitochondrial inhibitors,
effectively inhibiting oxidative phosphorylation, and driving
compensatory changes in the cell to use glycolysis to meet
the cells' energy demands.
• Post-2-DG acidification: This value includes other sources
of extracellular acidification that are not attributed to
glycolysis or mitochondrial TCA activity as well as any
residual glycolysis not fully inhibited by 2-DG. It is
measured after the addition of 2-DG in the Glycolytic Rate
Assay workflow.
•Inducedassay:Assay workflow that includes an acute
injection of an experimental compound prior to injection of
XF Glycolytic Rate Assay compounds. This workflow allows
for real-time quantification of in situ glycolysis activation or
repression.

10 Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide
Introduction

11
Agilent Seahorse XFp Glycolytic Rate Assay Kit
User Guide
Agilent Technologies
2
Kit Information
Kit Contents 11
Kit Shipping and Storage 11
Additional Required Items 12
Kit Contents
The Seahorse XFp Glycolytic Rate Assay Kit includes six foil
pouches, each containing Rot/AA mix and 2-DG. The kit
reagents are sufficient for six complete XFp Glycolytic Rate
Assays in an Agilent Seahorse XFp Cell Culture Miniplate.
Kit Shipping and Storage
The product ships at ambient temperature, and should be
stored at room temperature. The product is stable for one year
from the date of manufacture. The actual expiration date is
printed on the label of the assay kit box. Depending on the
shipping date, the actual shelf life of the kit in user’s hand can
vary between 12 to 3 months.
Table 1 Agilent Seahorse XFp Glycolytic Rate Assay kit contents in each foil pouch

Compound

Target

Effect
Cap
color
Quantity per
tube
Rotenone plus
Antimycin A (Rot/AA)
Mitochondrial ETC
complexes I and III,
respectively
Inhibits mitochondrial respiration,
typically leading to an increase in
glycolysis
Red 5.4 nmol each
2-deoxy-D-glucose (2-DG) Hexokinase(rate-limiting
enzyme in glycolysis)
Inhibits hexokinase, leading to a
decrease in glycolysis
Green 150 µmol

12 Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide
Kit Information
Additional Required Items
The following items are required to run the Seahorse XFp
Glycolytic Rate Assays, but not supplied with the kit.
Narrow p1000 pipette tips are recommended for reconstituting
compounds within the tubes provided (for example,
Fisherbrand™ SureOne™ Micropoint Pipet Tips, catalog #:
02-707-402)
Items Supplier Catalog number
Agilent Seahorse XFe/XF Analyzers Agilent Technologies
Seahourse XFp FluxPack (cartidges,
miniplates, and calibrant) Agilent Technologies 103022-100
XF DMEM medium, pH 7.4*
or
XF RPMI medium, pH 7.4*
* XF DMEM or RPMI media can also be purchased together with the supplements listed in
this table as bundled products (Catalog Number 103680-100 and 103681-100). For a full list
of all medium types and our recommendation for each assay kit, please refer to the
Seahorse XF Media Selection Guide.
http://www.agilent.com/cs/library/selectionguide/public/5991-7878EN.pdf

Agilent Technologies
103575-100

103576-100
XF 1.0 M Glucose solution Agilent Technologies 103577-100
XF 100 mM Pyruvate solution Agilent Technologies 103578-100
XF 200 mM Glutamine solution Agilent Technologies 103579-100

13
Agilent Seahorse XFp Glycolytic Rate Assay Kit
User Guide
Agilent Technologies
3
Assay Workflow
Day Prior to Assay 14
Day of Assay 14
Running the Assay 18
Analysis Using the Agilent Seahorse Glycolytic Rate Assay Report
Generator 19
Figure 3 Agilent Seahorse XFp Glycolytic Rate Assay workflow

14 Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide
Assay Workflow
Day Prior to Assay
1For adherent cells, plate the cells at a predetermined
density in the Agilent Seahorse XFp Cell Culture Miniplate
using the appropriate cell culture growth medium. For more
information, refer to the Basic Procedure, “Seeding Cells in
Seahorse XF Cell Culture Microplates”, available on the
Agilent Cell Analysis Learning Center.
www.agilent.com/en/products/cell-analysis/how-to-run-an-
assay
For suspension cells, see “Day of Assay” on page 14.
2Hydrate a sensor cartridge in Agilent Seahorse XF Calibrant
at 37 °C in a non-CO2incubator overnight (refer to Basic
Procedures to Run an XF Assay for details).
Day of Assay
Prepare Agilent Seahorse Glycolytic Rate Assay medium
1Prepare assay medium by supplementing Seahorse XF
DMEM or RPMI medium with pH 7.4 (Cat No 103575-100 and
103576-100). These media contain the appropriate amount
of HEPES and NO additional HEPES is needed. It is
recommended to start with 1 mM pyruvate,
2 mM glutamine, and 10 mM glucose. However, medium
composition can be changed depending on cell type or the
desired study conditions. For more information, refer to the
Basic Procedure, “Preparing Assay medium for Use in XF
Assays”, on the Agilent Cell Analysis Learning Center.
www.agilent.com/en/products/cell-analysis/how-to-run-an-
assay
2Bring XF medium with pH 7.4 and XF supplements into a
cell culture hood. Transfer a sufficient volume to a sterile
NOTE
The Cell Line Reference Database is a good resource for finding
information regarding the cell type of interest. Use the link below to obtain
information.
http://www.agilent.com/cell-reference-database
NOTE
If the assay medium is significantly changed from this formulation, the
Buffer Factor Protocol must be performed to derive the buffer factor value.
Consult Agilent Seahorse XF Buffer Factor Protocol User Guide for more
information.

Assay Workflow
Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide 15
bottle. It is not necessary to warm the medium and
supplements before this step.
3Add proper volumes of XF supplements to achieve the
desired final concentrations. This is your assay medium.
When recommended supplement concentrations are used,
pH-adjustment is not necessary.
4Warm the assay medium to 37 °C in a water bath. It is ready
to use.
Prepare Agilent Seahorse XFp cell culture miniplate for assay
For adherent cells
1Remove the cell culture miniplate from the 37 °C CO2
incubator, and examine the cells under a microscope to
confirm consistent plating and proper cell morphology.
2Wash the cells (refer to Basic Procedures to Run an XF
Assay for details). Remove the cell culture growth medium
in the cell culture miniplate. Wash once with warmed assay
medium using a multichannel pipette, and incubate with
assay medium at 37 °C in a non-CO2incubator for 45-60
minutes prior to the assay.
3Before starting the XF assay, remove the assay medium, and
add fresh, warm assay medium (see Table 4 on page 17 for
the appropriate Starting Well Volume).
For suspension cells
1Pellet cells out of their growth medium, and resuspend them
in warm assay medium.
2Count the cells, and suspend at a concentration such that
seeding 50 µL of cells contains the desired cell number per
well, leaving two wells without cells as background
correction wells.
3Add 50 µL cells/well, then centrifuge gently to adhere.
4Gently add 130 µL/well assay medium to each well to match
the Starting Well Volume.
5Incubate the plate at 37 °C in a non-CO2incubator for
45-60 minutes prior to the assay.

16 Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide
Assay Workflow
Prepare stock compounds
Use compounds the same day they are reconstituted. Do not
refreeze. Discard any remaining compound.
1Remove one foil pack from the kit box, then open the pouch
and remove the Rot/AA (red cap) vial and one 2-DG (green
cap) vial.
2Tap down the vials to ensure powder is on the bottom of the
tube before opening the vials.
3Resuspend each component with prepared assay medium as
described in Table 2 with a p1000 pipette. Tap down the
Rot/AA to ensure the powder is on the bottom of the tube.
Vortex ~1 minute to ensure that compounds go into solution.
Dilute compounds
Table 3 describes how to prepare compounds dilutions to load
the cartridge. Please note that if different starting assay
volumes or port volumes are used, adjust compounds
concentrations in order to obtain the recommended final
concentrations in the well.
Table 2 Stock solutions

Compound
Volume of assay
medium
Resulting stock
concentration
Rot/AA 216 µL 25 µM
2-DG 300 µL 500 mM
Table 3 Compound preparation for running the XFp Glycolytic Rate
Assay on an XFp Analyzer
Agilent
Seahorse XFp
Port A
Rot/AA
(Final well)
(µM)
Stock volume
(µL)
Medium
volume (µL)
10X (Port)
(µM)
0.5 60 240 5
Port B
2-DG
(Final well)
(mM)
Stock volume
(µL)
Medium
volume (µL)
10X (Port)
(mM)
50 300 0 500

Assay Workflow
Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide 17
Load sensor cartridge
Standard assay - no injection before Glycolytic Rate Assay
compounds. Load compounds into the following ports of a
hydrated sensor cartridge:
•Port A: Rot/AA
•Port B: 2-DG
Induced assay -To inject a test compound prior to the Glycolytic
Rate Assay compounds, use port A for the desired compound
and then load ports as follows:
•Port A: experimental compound (acute injection) or media
control
•Port B: Rot/AA
•Port C: 2-DG
Table 4 lists the appropriate volumes and concentrations for
injection schemes using two or more ports.
Table 4 Starting well assay medium volume and compound injection
volumes
Agilent Seahorse
XFp Analyzer
Starting well volume:
180 µL assay medium
Port Vol. Conc.
A20µL10X
B22µL10X
C25µL10X
D27µL10X

18 Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide
Assay Workflow
Running the Assay
Load template onto the Seahorse XFp Analyzer
If template(s) are already present, skip this step.
1Visit the Agilent Technologies website, and download the
Seahorse XFp Glycolytic Rate Assay Report Generator (both
Basic and Induced Assay Templates are included in the
downloaded folder).
2Copy the unzipped Assay Templates (*.asyt) files to the root
directory of a USB Flash Drive.
3Insert USB drive into the front USB port of the Seahorse
XFp analyzer.
4Click Settings, then click Template Management.
5Click the USB tab, and locate the Assay Template(s) to
upload.
6Click the checkbox next to each Assay Template to be
imported, then click Import.
7All imported Assay Templates will now be available for
selection from the ‘Local’ tab when starting an XFp assay.
Run the Seahorse XF Glycolytic Rate Assay
1Click Start.
2Select the Seahorse XF Glycolytic Rate Assay or Seahorse XF
Glycolytic Rate Assay (Induced Assay) template from the Local
tab.
3Group page: No action required – Confirm or adjust the
groups and plate map, then click the right arrow.
4Protocol page: No action required – Confirm the protocol
then click the right arrow.
5Summary page: Change the name of the assay results file, if
desired. Click Start Assay when ready.
6Place the utility plate with the loaded assay cartridge on the
instrument tray and click Continue. Calibration takes
approximately 20 minutes.
7When calibration has been completed, remove the utility
plate and place the Seahorse XFp Cell Culture Miniplate on
the tray and click Continue to start the assay.

Assay Workflow
Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide 19
Analysis Using the Agilent Seahorse Glycolytic Rate Assay Report
Generator
1When your run finishes, insert an USB Flash Drive on the
front USB of the Seahorse XFp analyzer and save your assay
file (*.asyr).
2In your Desktop version of Wave 2.3 or higher, open the file
from your USB Flash Drive.
3From Wave, export the data from the completed run as an
.xls file.
4Load the data file in the XF Glycolytic Rate Assay Report
Generator, and select groups to display.
5Click Update Summary to obtain the XF Glycolytic Rate Assay
Report. For further details, consult the Agilent Seahorse XF
Glycolytic Rate Assay Report Generator User Guide.

20 Agilent Seahorse XFp Glycolytic Rate Assay Kit User Guide
Assay Workflow