Detecting Aneuploidy Using Flow Cytometry

NewsGuard 100/100 Score

Aneuploidy is defined as a chromosomal aberration involving either an addition or deletion of chromosomes compared to the ‘normal' number of 46 chromosomes. Flow cytometry is a useful tool for detecting anueploidy.  

Down syndrome is caused by aneuploidy of chromosome 21Alila Medical Media | Shutterstock

Why flow cytometry?

Traditionally, aneuploidy was diagnosed by counting the metaphase chromosomes under the microscope. However, in many cases, and primarily due to the high or lower number of chromosomes, it was difficult to obtain a precise count. In addition, the method involves a lot of time and handling of strong acids, which makes it unsuitable for large-scale use.

Flow cytometry surpasses the aforementioned disadvantages since it quantifies the amount of DNA rather the counting the number of chromosomes. Also, due to the self-contained nature of the method, there is no interaction with hazardous solvents.

Flow cytometry is an accurate, reliable technique

The accuracy of flow cytometry is subject to following conditions: low level of variation coefficient of the DNA peaks, an equal proportion of cells in each peak, and a small difference in DNA of the sample and internal reference.

For example, if the DNA peak in the internal reference peaks at 100, the peak of the DNA from the samples should lie in the range of +/- 50 from the reference peak. The mean positions should be defined for both reference and sample peaks. The standard ratio is constant and refers to the ratio of the sample peak and reference peak.

Flow cytometry to detect aneuploidy in plant samples

In plant samples, the midrib of an open leaf is cut using a razor in the petri dish that consists of citric acid and Tween 20. The sample can be filtered using a nylon mesh. The internal reference standard, such as red blood cell (RBC) nuclei and nuclear stain are added to the buffer.

DNA content is determined by comparing the nuclei of the internal reference and the sample nuclei, and around 5000-10000 nuclei are analyzed to get an average. However, in certain cases, all chromosomes may not have the same number, which can potentially lead to complications in the flow cytometry analysis.

Flow cytometry to detect aneuploidy in cancers

Flow cytometry has also been performed to detect aberrations in the chromosome number in human small cell lung carcinoma. In this case, two or three tissue sections that were approximately 50 micrometers wide were dewaxed in xylene, subjected to rehydration in ethanol, and then washed in distilled water.

The tissues were treated with citrate and pepsin to obtain single-cell suspensions. These were then filtered in nylon mesh and washed. Dissociated nuclei were stained for nuclei using propidium iodide. These nuclei were then subjected to flow cytometry and analyzed using the ModFit software.

Analyzing the data

In cases where the coefficient of variation exceeds 10%, the histograms are discarded and not used for the final analysis. The sample is considered diploid in cases where there is a single and separate peak in G0/G1 phase. The histograms that were tetraploid or multiploid are classified as aneuploid.

Further Reading

Last Updated: Mar 28, 2019

Dr. Surat P

Written by

Dr. Surat P

Dr. Surat graduated with a Ph.D. in Cell Biology and Mechanobiology from the Tata Institute of Fundamental Research (Mumbai, India) in 2016. Prior to her Ph.D., Surat studied for a Bachelor of Science (B.Sc.) degree in Zoology, during which she was the recipient of an Indian Academy of Sciences Summer Fellowship to study the proteins involved in AIDs. She produces feature articles on a wide range of topics, such as medical ethics, data manipulation, pseudoscience and superstition, education, and human evolution. She is passionate about science communication and writes articles covering all areas of the life sciences.  


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    P, Surat. (2019, March 28). Detecting Aneuploidy Using Flow Cytometry. News-Medical. Retrieved on May 19, 2024 from

  • MLA

    P, Surat. "Detecting Aneuploidy Using Flow Cytometry". News-Medical. 19 May 2024. <>.

  • Chicago

    P, Surat. "Detecting Aneuploidy Using Flow Cytometry". News-Medical. (accessed May 19, 2024).

  • Harvard

    P, Surat. 2019. Detecting Aneuploidy Using Flow Cytometry. News-Medical, viewed 19 May 2024,


The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical.
Post a new comment

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.

You might also like...
New Sartorius Digital Handbook brings the power of High-Throughput Screening (HTS) by cytometry to every scientist