New Ultrasound-Based Cancer Detection Technique

Syllabus: Health and Technology

Source: TH

Context: Scientists have developed a new technique to detect cancers. The method uses ultrasound to turn a small part of our body’s tissue into droplets that are released into the blood. These bubbles contain molecules like RNA, DNA, and proteins that allow the scientists to identify particular types of cancer.

Technology used and methods:

• High-energy ultrasound: Employs higher-frequency sound waves than traditional ultrasound, capable of interacting more intensely with tissues.

• Droplet formation: The ultrasound waves cause tiny pieces of cancerous tissue to break off, turning them into droplets that release molecular contents into the bloodstream.

• Biomarker analysis: The droplets contain biomarkers like RNA, DNA, and proteins, which are then extracted from the blood and analyzed to identify specific cancer types.

• Single cell detection capability: The method is sensitive enough to detect a single cancer cell in blood samples, providing insights into cancer progression and metastasis.

Significance

• Non-invasive technique: Reduces the need for painful and invasive procedures like biopsies, making cancer detection easier for patients.

• Cost-effective solution: Expected to lower the cost of cancer detection significantly, offering a more affordable alternative to current expensive tests.

• High sensitivity: Increases the concentration of detectable biomarkers by over 100 times, improving early cancer detection accuracy.

• Versatility: Has the potential to detect multiple cancer types, such as prostate, breast, and melanoma, using a single diagnostic approach.

Limitations:

• Clinical validation required: Needs extensive clinical trials on diverse populations to ensure its effectiveness and accuracy before widespread use.

• Technical standardization: Challenges in standardizing the technique for different cancer types and ensuring consistent results across various settings.

• Biomarker variability: The sensitivity of detection may vary with different cancers due to variations in biomarker thresholds, potentially affecting accuracy.

• Early development stage: Still in the experimental phase, with a timeline of at least five years before potential commercial availability, depending on trial outcomes.

Early Cancer Detection:

• Definition: Early cancer detection involves identifying cancer at its initial stages, significantly improving treatment outcomes.

• Two components: Screening: Testing asymptomatic individuals to detect cancer before symptoms appear (e.g., mammography for breast cancer). Early diagnosis: Focuses on symptomatic patients, aiming for prompt detection, diagnosis, and treatment.

• Screening: Testing asymptomatic individuals to detect cancer before symptoms appear (e.g., mammography for breast cancer).

• Early diagnosis: Focuses on symptomatic patients, aiming for prompt detection, diagnosis, and treatment.

• Difference: Screening targets asymptomatic people and specific cancers (e.g., breast, cervical), while early diagnosis focuses on all cancers in symptomatic patients.

• Challenges: Risk of false-positive and false-negative results. Overdiagnosis leading to unnecessary treatments. Limited recommendations for certain cancers due to risk-benefit concerns.

• Risk of false-positive and false-negative results.

• Overdiagnosis leading to unnecessary treatments.

• Limited recommendations for certain cancers due to risk-benefit concerns.

About Cancer

• Definition: Cancer is a disease characterized by uncontrolled cell growth that spreads to other parts of the body.

• Global impact: The second leading cause of death worldwide, responsible for 1 in 6 deaths in 2018.

• Importance of early detection: Early detection increases the likelihood of successful treatment and can significantly reduce mortality rates.

Insta Links:

• Cancer-in-India-a-status-report

• Cancer-moonshot-initiative

• What are the research and developmental achievements in applied biotechnology? How will these achievements help to uplift the poorer sections of the society? (UPSC-2021)

• What do you understand by nanotechnology and how is it helping in health sector? (UPSC-2020)

• Why is there so much activity in the field of biotechnology in our country? How has this activity benefitted the field of biopharma? (UPSC-2018)