Real-time Pcr Quantification
Real-time Pcr Quantification - Related Videos
09:26
Cerebrospinal Fluid MicroRNA Profiling Using Quantitative Real Time PCR
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Cited by 10 •
2014
We describe a protocol of real time PCR to profile microRNAs in the cerebrospinal fluid (CSF). With the exception of RNA extraction protocols, the procedure can be extended to RNA extracted from other body fluids, cultured cells, or tissue specimens.
08:30
MicroRNA Detection in Prostate Tumors by Quantitative Real-time PCR (qPCR)
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Cited by 18 •
2012
Quantitative Real Time polymerase chain reaction (qPCR) is a rapid and sensitive method to investigate the expression levels of various microRNA (miRNA) molecules in tumor samples. Using this method expression of hundreds of different miRNA molecules can be amplified, quantified, and analyzed from the same cDNA template.
02:57
Real Time RT-PCR
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2021
Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction. The real-time quantification of the number of amplified products is...
10:28
Probe-based Real-time PCR Approaches for Quantitative Measurement of microRNAs
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Cited by 33 •
2015
Circulating microRNAs have recently emerged as promising and novel biomarkers for various cancers and other diseases. The goal of this article is to discuss three different probe-based real-time PCR platforms and methods that are available to quantify and determine the abundance of circulating microRNAs.
11:37
Simultaneous DNA-RNA Extraction from Coastal Sediments and Quantification of 16S rRNA Genes and Transcripts by Real-time PCR
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Cited by 24 •
2016
A protocol to quantify bacterial 16S rRNA genes and transcripts from coastal sediments via real-time PCR is provided. The methodology includes the co-extraction of DNA and RNA; preparation of DNA-free RNA; and 16S rRNA gene and transcript quantification via RT-q-PCR, including standard curve construction.
FAQs
The fluorescence readout links signal intensity to the amount of amplified DNA formed during each PCR cycle. Monitoring this relationship makes product accumulation measurable while the reaction proceeds, rather than relying on a single final observation. The resulting signal pattern supports sensitive detection of target nucleic acids and provides the basis for determining a cycle-threshold value.
The cycle threshold connects the observed amplification signal with the starting amount of target nucleic acid. When paired with a standard curve, it supports estimation of an absolute starting quantity. When interpreted against a reference gene, it supports relative quantification, allowing researchers to compare target levels across samples or experimental conditions.
Fluorescent dyes and sequence-specific probes provide alternative ways to generate the signal used for quantification. In each case, fluorescence reflects the formation of amplified product, so the instrument can follow accumulation across PCR cycles. This signal-generation step is central to converting molecular amplification into a quantitative measurement of the target.
The workflow begins with amplification of the target nucleic acid while fluorescence is recorded during successive PCR cycles. Researchers then identify the cycle-threshold result and interpret it using either a standard curve for absolute measurement or a reference gene for relative measurement. This sequence connects reaction monitoring with a quantitative estimate suitable for comparing samples.
In bioengineering, the method can examine gene expression, validate engineered cells, and investigate biomaterial studies. It also helps evaluate synthetic biology systems by providing a quantitative readout of target nucleic acids. These measurements allow researchers to characterize biological constructs and monitor whether an engineered system produces the expected experimental outcome.
Real-time Pcr Quantification provides a rapid quantitative readout that can be applied to pathogen detection and to development of diagnostic or therapeutic platforms. By measuring target nucleic acids, researchers can monitor experimental outcomes and assess platform performance. The same information can guide optimization when biological constructs or engineered systems require quantitative evaluation.