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AAT Bioquest

Amylite™ Red

The accumulation of insoluble amyloid plaques in the nerve tissue is widely considered to contribute to the development of neurodegenerative human diseases, such as Alzheimer’s disease. The investigation of the beta-amyloid formation is one of the most important tasks to find an effective way to inhibit the accumulation of insoluble amyloid plaques in the nerve tissue. However, the lack of effective imaging tools severely limited this research. Staining of nerve tissues with Congo Red dye is one of the most common tools for monitoring the formation of the amyloid aggregates. Congo Red has a few limitations such as its low sensitivity, significant toxicity and carcinogenicity. AAT Bioquest developed Amylite™ Red stain to address these limitations. Amylite™ Red is designed to label amyloid plaques in paraffin-embedded or freshly cut frozen tissue sections via a simple mix and read step. Amylite™ Red staining can be completed within 30 minutes with desired specificity. The staining process does not require antibodies. It is much more efficient and cost effective than the anti-amyloid antibody-based fluorescence imaging. Amylite™ Red imaging reagent is compatible with other fluorophores, such as DAPI, Hoechst and ethidium bromide, as well as fluorescent-labelled antibodies with emission spectra in the blue or green emission range, such as GFP.

Example protocol

AT A GLANCE

Important Note

Before using Amylite™ Red for the first time, thaw the labeling dye at room temperature and briefly centrifuge to gather the dried pellet.

Protocol Summary
  1. Prepare the tissue slides.

  2. Add the Amylite™ Red working solution to the tissue sections.

  3. Incubate at room temperature for 3 to 5 minutes.

  4. Wash slides with 40% ethanol.

  5. Conduct counterstaining with DAPI as needed.

  6. Mount the samples with a suitable mounting medium. Then, monitor the staining using a fluorescence microscope with a Cy3 filter set.

PREPARATION OF STOCK SOLUTIONS

Unless otherwise noted, all unused stock solutions should be divided into single-use aliquots and stored at -20 °C after preparation. Avoid repeated freeze-thaw cycles

Amylite™ Red Stock Solution (100X)
  1. To prepare a 100X Amylite™ Red stock solution, add 100 μL of DMSO to the Amylite™ Red vial.

    Note: Prepare a single aliquot of any unused Amylite™ Red stock solution and store it at ≤-20°C, protected from light. Avoid freeze/thaw cycles.

PREPARATION OF WORKING SOLUTION

Amylite™ Red Working Solution
  1. Prepare the Amylite™ Red working solution by adding 10 μL of Amylite™ Red stock solution to 1 mL of 50% ethanol solution. Protect the Amylite™ Red working solution from light by covering it with foil or placing it in a dark location.

    Note: For optimal results, use this solution within a few hours of preparation.

    Note: 1 mL of the working solution is sufficient for 10 tests.

SAMPLE EXPERIMENTAL PROTOCOL

Tissue Preparation (Deparaffinization and Rehydration):
  1. Wash the slides with Xylene for 3 minutes.

  2. Wash the slides with 100% Ethanol for 1 minute.

  3. Wash the slides with water for 2 minutes.

Tissue Staining
  1. Add 100 μL of Amylite™ Red working solution to the tissue sections.

    Note: Ensure sufficient solution is added to thoroughly cover the tissue slides.

  2. Incubate the slides at room temperature for 3 to 5 minutes.

    Note: The incubation time can be adjusted for optimal results.

  3. Wash the tissue slides twice with 40% ethanol, for 5 minutes each time.

  4. Use a suitable counterstain, such as DAPI, if needed.

  5. Apply the mounting medium to the slides and allow them to dry.

  6. Observe the slides using a fluorescence microscope equipped with a Cy3 filter set.

Spectrum

Product family

NameExcitation (nm)Emission (nm)
Amplite® Red571584
Nile Red *CAS 7385-67-3*559635
LysoBrite™ Red576596

References

View all 100 references: Citation Explorer
Temporal and structural sensitivities of major biomarkers for detecting neuropathology after traumatic brain injury in the mouse.
Authors: Xiong, Guoxiang and Jean, Ian and Farrugia, Anthony M and Metheny, Hannah and Johnson, Brian N and Cohen, Noam A and Cohen, Akiva S
Journal: Frontiers in neuroscience (2024): 1339262
Investigating Contributions of Canonical Transient Receptor Potential Channel 3 to Hippocampal Hyperexcitability and Seizure-Induced Neuronal Cell Death.
Authors: Phelan, Kevin D and Shwe, U Thaung and Wu, Hong and Zheng, Fang
Journal: International journal of molecular sciences (2024)
High Doses of ANA12 Improve Phenobarbital Efficacy in a Model of Neonatal Post-Ischemic Seizures.
Authors: Vyas, Preeti and Chaturvedi, Ira and Hwang, Yun and Scafidi, Joseph and Kadam, Shilpa D and Stafstrom, Carl E
Journal: International journal of molecular sciences (2024)
Extracts from Dendropanax morbifera leaves ameliorates cerebral ischemia-induced hippocampal damage by reducing oxidative damage in gerbil.
Authors: Jung, Hyo Young and Kwon, Hyun Jung and Kim, Woosuk and Yoo, Dae Young and Kang, Min Soo and Choi, Jung Hoon and Moon, Seung Myung and Kim, Dae Won and Hwang, In Koo
Journal: Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association (2024): 107483
Pomalidomide Improves Motor Behavioral Deficits and Protects Cerebral Cortex and Striatum Against Neurodegeneration Through a Reduction of Oxidative/Nitrosative Damages and Neuroinflammation After Traumatic Brain Injury.
Authors: Huang, Ya-Ni and Greig, Nigel H and Huang, Pen-Sen and Chiang, Yung-Hsiao and Hoffer, Alan and Yang, Chih-Hao and Tweedie, David and Chen, Ying and Ou, Ju-Chi and Wang, Jia-Yi
Journal: Cell transplantation (2024): 9636897241237049
Page updated on December 2, 2024

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Catalog Number23040
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Physical properties

Molecular weight

391.23

Solvent

DMSO

Spectral properties

Excitation (nm)

485

Emission (nm)

671

Storage, safety and handling

H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22

Storage

Freeze (< -15 °C); Minimize light exposure

Platform

Fluorescence microscope

Excitation510 nm
Emission660 nm
Recommended plateBlack wall, clear bottom
Amylite™ Red staining on healthy and Alzheimer's disease brain tissue with DAPI counterstain.
Amylite™ Red staining on healthy and Alzheimer's disease brain tissue with DAPI counterstain.
Amylite™ Red staining on healthy and Alzheimer's disease brain tissue with DAPI counterstain.