05 Cell Staining

Lysosomal Acidic pH Detection Kit-Green/Deep Red

Accurate pH changes can be detected by measuring lysosomal pH and volume changes in the same sample
All-in-one Kit with Lysosome Acidification Inhibitor included
Compatible with imaging and quantitative assay

Product code

L268　 Lysosomal Acidic pH Detection Kit-Green/Deep Red

Unit size	Price	Item Code
1 set		L268-10

Component

1 set	LysoPrime Deep Red pHLys Green Bafilomycin A1	x 1 x 1 x 1

C of A

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Description

Lysosomes are acidic vesicles, one of the intracellular organelles that contribute to the maintenance of homeostasis by degrading unwanted substances. Since lysosomal dysfunction is deeply involved in the onset and progression of neurodegenerative diseases and other disorders, detailed analysis of lysosomes has attracted much attention in elucidating pathological conditions and developing therapeutic agents. Furthermore, recent studies have shown that a decrease in acidity inside lysosomes in mouse models of the neurodegenerative disease Alzheimer's disease results in the inability to degrade waste products inside autophagosomes and the accumulation of toxic amyloid-β*, thus increasing the need to confirm the pH of lysosomes.
Live imaging using small molecule fluorescent dyes has been widely used for lysosomal live cell analysis, but the specificity of the dyes and the accuracy of fluorescence brightness in response to changes in pH have been cited as issues. This product is bundled with two types of dyes that overcome these issues, and the combination of these dyes enables a more accurate live cell analysis of lysosomes.

*Nature Neuroscience, 2022, 25, 688–701.

Manual

Manual

Technical info

With existing reagents, it was difficult to determine whether lysosomal mass or their function (pH) fluctuated because the discussion was based on changes in the fluorescence brightness of a single dye. This kit contains pHLys Green, which is highly specific to lysosomes and shows pH-dependent changes in fluorescence, and pH-resistant LysoPrime Deep Red [Code:L264]. Using these two dyes, lysosomal pH and volume of the same sample can be measured for a detailed analysis of lysosomal function.

Why can we analyze accurate lysosomal function?

Comparison of pHLys Green and existing products

Existing lysosomal pH detection reagents have issues with dye localization, pH sensitivity, and retention. pHLys Green is a dye that solves these issues. The improved dye retention and localization enable detection of normal lysosomes, and the improved pH sensitivity enables detection of slight pH changes.

1. High sensitive pH detection Comparison of pH response of cells treated with low concentrations of lysosomal acidification inhibitor Bafilomycin A1

2. High specificity for lysosomes Comparison of specificity for lysosomes using lysosomal marker protein LAMP1-GFP expressing cells

3. High retention in lysosomes Comparison of intracellular retention

**Click here to compare LysoPrime Deep Red with existing products.

Features of the kit and comparison with existing reagents

All reagents necessary for the measurement are included in one kit. In addition, the fluorescent properties of the dyes enable co-staining with dyes that have red fluorescent properties.

Compared to existing staining dyes, Dojindo's lysosomal detection dyes selectively accumulate on lysosomes and continue to stain for more than 24 hours. These dyes can be used in combination, and lysosomal mass and pH can be more accurately confirmed.

	【this product】 Lysosomal Acidic pH Detection Kit -Green/Deep Red (L268)		Lysosomal Acidic pH Detection Kit (L266)		Company T	Company T
Dye/ Wave length	pHLys Green Ex=488 nm Em=490-550 nm	LysoPrime Deep Red Ex=633 nm Em=640-700 nm	pHLys Red Ex=561 nm Em=560-650 nm	LysoPrime Green Ex=488 nm Em=500-600 nm	Lysosomes pH sensor	Lysosomes Staining dye
Purpose	pH	Mass	pH	Mass	pH	pH/Mass
lysosome pH sensitivity	✓	Resistant to pH change	✓	Resistant to pH change	Less sensitivity	Less sensitivity
lysosome Specificity	✓	✓	✓	✓	✓	✓
lysosome retention	✓	✓	✓	✓	✓	✓

Example of experiment : Imaging and FCM analysis of lysosomal pH change using Bafilomycin A1

HeLa cells were used to detect changes in lysosomal mass and pH when treated with the lysosomal acidification inhibitor Bafilomycin A1 (Baf. A1). The fluorescence of LysoPrime Deep Red has no change regardless of the addition of Baf. A1, while the fluorescence of pHLys Green decreased due to lysosomal neutralization caused by the addition of Baf. A1. This indicates that Baf. A1 does not affect lysosomal mass, although lysosomal function is reduced.

pHLys Green (Green) : Ex=488 nm, Em=490-550 nm
LysoPrime Deep Red (Violet) : Ex=633 nm, Em=640-700 nm

pHLys Green (FITC Filter) : Ex=488 nm, Em=515-545 nm
LysoPrime Deep Red (APC Filter) : Ex=640 nm, Em=650-670 nm

Experimental example: measurement of intracellular iron changes and lysosomal pH changes

In neurodegenerative diseases, the relationship between lysosomal function and iron has attracted attention, and it has been reported^* that lysosomal neutralization prevents the breakdown of iron stores (Transferrin or Ferritin), resulting in a decrease in intracellular iron.
Lysosomal pH changes and intracellular iron changes in the same sample were detected using SH-SY5Y cells supplemented with lysosomal acidification inhibitor (Bafilomycin A1) or iron chelator (Deferipron (DFP)). (Lysosomal pH: this kit, Intracellular iron: FerroOrange [Code:F374])
The results showed that the addition of Bafilomycin A1 decreased the fluorescence of FerroOrange, confirming the decrease in intracellular iron. The fluorescence of LysoPrime DeepRed remained almost unchanged, while the fluorescence of pHLys Green decreased due to lysosomal neutralization. These results suggest that there is a relationship between changes in intracellular iron and lysosome function.

*Mol Cell., 2020, 77(3), 645-655.

＜Condition＞
pHLys Green (Green) : Ex=488 nm, Em=486-574 nm
FerroOrange (Red) : Ex=561 nm, Em=550-650 nm
LysoPrime Deep Red (Violet) : Ex=633 nm, Em=599-700 nm

Lysosome Staining Reagents and Kits

Explore Dojindo's wide range of lysosomal staining and pH detection dyes. Choose the following kit or reagent that aligns with your experimental requirements.

Product Name (Item Code)	Supported Devices			Indicator and Detection Color	Dyes and Fluorescence Properties	Approximate Number of Use
Product Name (Item Code)				Indicator and Detection Color	Dyes and Fluorescence Properties	Approximate Number of Use
Lysosomal Acidic pH Detection Kit-Green/Deep Red (L268)	✓	✓	✓	pH	pHLys Green Ex: 488 nm / Em: 490-550 nm	[for 1 set] 35 mm dish: 10 dishes μ-Slide 8 well: 10 plates 96-well Plate: 2 plates
Lysosomal Acidic pH Detection Kit-Green/Deep Red (L268)	✓	✓	✓	quantity	LysoPrime Deep Red Ex: 633 nm / Em: 640-700 nm
Lysosomal Acidic pH Detection Kit (L266)	✓	Need G/Y Laser G:532 nm Y:561 nm	✓	pH	pHLys Red Ex: 561 nm / Em: 560-650 nm
Lysosomal Acidic pH Detection Kit (L266)	✓		✓	quantity	LysoPrime Green Ex: 488 nm / Em: 500-600 nm
pHLys Red- Lysosomal Acidic pH Detection (L265)	✓		✓	pH	pHLys Red Ex: 561 nm / Em: 560-650 nm	[for 1 tube] 35 mm dish: 10 dishes μ-Slide 8 well: 10 plates 96-well Plate: 2 plates
LysoPrime Deep Red - High Specificity and pH Resistance (L264)	✓	✓	✓	quantity	LysoPrime Deep Red Ex: 633 nm / Em: 640-700 nm
LysoPrime Green- High Specificity and pH Resistance (L261)	✓	✓	✓	quantity	LysoPrime Green Ex: 488 nm / Em: 500-600 nm	[for 10 μl] 35 mm dish: 10 dishes μ-Slide 8 well: 10 plates 96-well Plate: 2 plates

Q & A

Q I am considering a drug stimulus that affects lysosomal pH. What precautions should we take?: A

LysoPrime Deep Red staining must be performed before drug stimulation. Staining with pHLys Green must be done after LysoPrime Deep Red staining. For stimulation with Bafilomycin A1 (lysosomal acidification inhibitor), which is included in the kit, either add Bafilomycin A1 to pHLys Green working solution and perform staining and stimulation at the same time, or stain with pHLys Green working solution and then use Bafilomycin A1 for stimulation. Bafilomycin A1 should be added to pHLys Green working solution and stimulation should be performed simultaneously.

Q Can I stain with serum-containing medium?: A

LysoPrime Deep Red cannot be stained because it is affected by serum. Make sure to use a serum-free solution such as HBSS or serum-free medium to make a working solution. pHLys Green can be used for staining. HBSS or PBS can be used as a working solution.

Q What concentrations of LysoPrime Deep Red and pHLys Green should be used when considering staining conditions?

Please refer to the following when optimizing staining conditions.

LysoPrime Deep Red
<When fluorescence intensity is weak
Use a dilution of 500 to 1,000 times.
<When nonspecific adsorption is observed>
Please consider between 1,000x and 5,000x dilution.

pHLys Green
<When fluorescence intensity is weak
Use a dilution of 250-1,000x.
<When nonspecific adsorption is observed
Please consider between 1,000x and 2,000x dilution.

Handling and storage condition

Handling and storage condition
1. Storage: -20℃, Protect from light 2. Nitrogen substitution, Moisture-proof

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Lysosomal Acidic pH Detection Kit-Green/Deep Red

Lysosomal Acidic pH Detection Kit-Green/Deep Red