Non-invasive Screening
Non-invasive Screening - Related Videos
10:16
Chick Heart Invasion Assay for Testing the Invasiveness of Cancer Cells and the Activity of Potentially Anti-invasive Compounds
0 Views •
Cited by 4 •
2015
Here, we present a protocol to study the invasion of tumor cells into living normal tissue fragments in three dimensions. This organ culture technique is mainly applied to test potentially anti-invasive drugs in vitro.
09:44
High-throughput Screening for Chemical Modulators of Post-transcriptionally Regulated Genes
0 Views •
2015
Here we describe a cell-based reporter gene assay as a valuable tool to screen chemical libraries for compounds modulating post-transcriptional control mechanisms exerted through 3’ UTR.
12:19
Three-Dimensional (3D) Tumor Spheroid Invasion Assay
0 Views •
Cited by 222 •
2015
Invasion of surrounding normal tissues is a defining characteristic of malignant tumors. We provide here a simple, semi-automated micro-plate assay of invasion into a natural 3D biomatrix that has been exemplified with a number of models of advanced human cancers.
08:50
Genetic Screens
0 Views •
2023
Genetic screens are critical tools for defining gene function and understanding gene interactions. Screens typically involve mutating genes and then assessing the affected organisms for phenotypes of interest. The process can be “forward”, where mutations are generated randomly to identify unknown genes responsible for the phenotypes, or it can be “reverse”, where specific genes are targeted for mutation to observe what phenotypes are produced.Here, JoVE reviews various types of genetic...
07:58
Invasion Assay Using 3D Matrices
0 Views •
2023
The extracellular matrix (ECM) is a network of molecules that provide a structural framework for cells and tissues and helps facilitate intercellular communication. Three-dimensional cell culture techniques have been developed to more accurately model this extracellular environment for in vitro study. While many cell processes during migration through 3D matrices are similar to those required for movement across rigid 2D surfaces, including adherence, migration through ECM also requires cells...
FAQs
These approaches evaluate disease-associated structural or molecular signals. Structural signals may be assessed through external imaging, while molecular signals can be examined in naturally collected materials such as urine, stool, or exhaled breath. The findings help researchers identify suspicious changes and estimate a person’s likelihood of having cancer, rather than establish a diagnosis by themselves.
Risk stratification organizes people according to the likelihood that a suspicious finding reflects cancer. This can help distinguish individuals who may need closer evaluation from those requiring less immediate follow-up. In cancer research, that information supports clinical decision-making and helps assess whether screening tools can identify concerning changes before more invasive diagnostic procedures are considered.
External imaging and naturally collected samples provide different types of information. Imaging focuses on structural changes that can be observed from outside the body, whereas urine, stool, and exhaled breath can be analyzed for molecular signals. Using these complementary sources may allow researchers to study cancer-related changes through more than one non-surgical route.
A screening result indicates suspicion or likelihood, not confirmation that cancer is present. Positive or uncertain findings therefore typically require follow-up diagnostic testing to clarify their meaning. This distinction is important because screening is intended to identify people who may need further evaluation, while diagnosis requires additional evidence obtained through appropriate clinical assessment.
A typical workflow begins by obtaining an external imaging result or a naturally collected sample, followed by analysis of structural or molecular signals. Researchers then interpret the findings to identify suspicious changes or stratify risk. Individuals with positive or uncertain results generally proceed to diagnostic follow-up, linking screening with confirmation and clinical decision-making.
The source material identifies two broad routes: external imaging and analysis of naturally collected samples. Sample-based approaches may use urine, stool, or exhaled breath, while imaging evaluates structural signals without surgically entering the body. These options reduce the need for tissue removal during initial assessment and support research into more accessible screening strategies.
In addition to identifying suspicious changes and stratifying risk, these approaches can help monitor responses over time. Repeated assessments may provide information about how findings change during observation or treatment-related evaluation. This makes non-invasive screening relevant not only to earlier evaluation, but also to research on longitudinal monitoring and clinical decision-making.
Improved non-invasive screening tools could reduce procedural burden by allowing initial evaluation through external imaging or naturally collected samples. Greater convenience and accessibility may help extend screening to more diverse patient populations. Their clinical value still depends on accurate interpretation and appropriate diagnostic follow-up for positive or uncertain findings.