Sonodynamic Therapy (SDT)

What is Sonodynamic Therapy (SDT)?

Sonodynamic Therapy (SDT) is an advanced, non-invasive cancer treatment that uses low-intensity ultrasound waves to activate specialized cancer-fighting agents known as sonosensitizers. Once activated, these agents generate reactive oxygen species (ROS) that selectively destroy cancer cells while minimizing harm to healthy tissues. SDT offers a targeted and less toxic alternative for patients, particularly those with inoperable tumors or resistance to conventional treatments.

 

Background

Conventional cancer treatments such as surgery, chemotherapy, and radiation can be very effective when a tumour is caught early, but may be limited by both toxicity side-effects and chemotherapy resistance for more advanced or inoperable tumours.

In addition, many solid tumors not only suppress the immune system but can mask themselves away from it, making it challenging for the body’s immune system to detect and fight cancer effectively.

SDT provides a natural, complementary treatment, that selectively targets cancer cells without systemic side effects. It is particularly useful for patients who cannot undergo surgery or have not responded to conventional treatments.

 

How Does Sonodynamic Therapy (SDT) Work?

1. Administration of a Sonosensitizer

A sonosensitizing agent is given to the patient, and is a compound that selectively accumulates in cancer cells, and is highly absorbent of ultrasound waves. Recent studies have confirmed a chlorophyll (Plant-based) derivative fulfills these characteristics, and can be conveniently administered sublingually before the ultrasound treatment.

2. Ultrasound Activation

The patient undergoes treatment in a specialized ultrasound bath, where low-intensity ultrasound waves target the tumor site.

3. Reactive Oxygen Species (ROS) Generation

When exposed to ultrasound, the sonosensitizer activates, producing ROS. These highly reactive molecules damage cancer cell structures, leading to apoptosis (programmed cell death).

4. Cavitation Effect

The ultrasound waves create microscopic bubbles within the tumor tissue, a process known as cavitation. These bubbles collapse rapidly, further enhancing the destruction of cancer cells.

5. Immune System Modulation

SDT not only kills cancer cells but also helps alter the tumor microenvironment, potentially strengthening the body’s natural immune response against cancer.

 

Key Advantages of Sonodynamic Therapy (SDT)

• Non-Invasive & Painless

  • SDT does not require surgery or radiation, making it an ideal option for patients who are not suitable for invasive procedures. The treatment is externally applied, reducing recovery time and minimizing complications.

• Deep Tumor Penetration

  • Unlike photodynamic therapy (PDT), which relies on light that has limited tissue penetration, SDT uses ultrasound waves that can reach deeper tumors inside the body.

• Targeted Cancer Cell Destruction

  • Sonosensitizers selectively accumulate in tumor cells, ensuring that the treatment primarily affects cancerous tissues while sparing healthy cells.

• Effective for Metastatic & Hard-to-Reach Tumors

  • SDT can treats metastatic cancers, as ultrasound waves can penetrate throughout the body.

• Safe for Repeated Use

  • Many conventional cancer treatments have usage limits due to cumulative toxicity. SDT, however, can be administered multiple times without increasing long-term toxicity risks.

• Compatible with Other Therapies

  • SDT can be combined with chemotherapy, immunotherapy, and supportive treatments to improve overall cancer management.

 

Safety and Applications

Research has explored SDT’s effectiveness in various cancers, including breast, pancreatic, lung, and glioblastoma. Clinical studies suggest that SDT, when combined with other therapies, can improve patient outcomes while reducing the toxic effects of traditional treatments.

How do I prepare for and undergo SDT treatment?

Suitability Assessment

Your doctor will confirm if SDT is right for you based on:

Review of your latest medical reports and blood tests (new tests may be ordered if needed).

Timing considerations:

• Wait ≥1 week after surgery before starting SDT.
• Allow ≥1 day gap after radiation therapy.
• SDT can be done concurrently with chemotherapy (even same-day).
• Large open wounds must be healed or waterproof-dressed.

Preparation & Procedure

Before treatment:

1. Remove all jewelry/piercings.
2. Wear a tight-fitting, metal-free swimsuit if modesty/religion requires; otherwise, disrobe for optimal contact.
3. Bring: Bath towel + snorkel/nose clip (for face-down positioning). Note: Swimsuits are not recommended for prostate/testicular/cervical cancer.

During treatment (30-40 mins/session):

• Relax in the ultrasound bath; gentle body movements ease tingling sensations (normal side effect).
• A companion may accompany you, or a medical assistant will monitor remotely/assist if needed.
• Short breaks permitted midway.

After treatment:

• Caution: Exit tub/shower slowly (floors may be slippery).
• Avoid direct sunlight for 24 hours.

Taking the Chlorophyll Sensitizer

Dosage: 5 ml (via dropper) on Day 1 & 3 of each week.

Method:

• Place liquid under tongue (few drops at a time).
• Hold each dose 1-2 mins; complete within 15-30 mins.
• No food/drink for 30 mins afterward.
• Storage: Refrigerate sensitizer.
• Supply: 4 bottles required per 8-session cycle.

 Note: Sensitizer remains detectable in the body for ≤20 days.

For further enquiries:

If you would like to discover if you are suitable for Sonodynamic Therapy (SDT), please contact us on:

Whatsapp: +852 9456 3881

Phone: +852 2881 8131

Email: reception@lifeclinic.com.hk