|

How Photodynamic Therapy is Changing the Game for Mesothelioma Patients

ByHolly Zink
How Photodynamic Therapy is Changing the Game for Mesothelioma Patients

When it comes to treating a tough cancer like malignant pleural mesothelioma, doctors use many different methods. One important way is surgery to remove the big parts of the disease.

Researchers from the University of Pennsylvania have been studying how another treatment called photodynamic therapy (PDT) can help during surgery. PDT is a special light treatment has shown potential in animal studies. Surgery and PDT can work together to help mesothelioma patients.

Combining Surgery and PDT for Optimal Treatment

Mesothelioma is a rare but deadly cancer caused by asbestos exposure. Pleural mesothelioma occurs on the membrane around the lungs. It is the most common type of mesothelioma. Around 2,500 Americans receive a mesothelioma diagnosis each year. There is no cure.

Surgery plays a pivotal role in reducing the bulk of mesothelioma tumors. But even after surgery, there can be lingering cancer cells. That’s where photodynamic therapy (PDT) comes in. The research team used PDT with a special light-sensitive medicine called Photofrin on MPM models in mice. These models had some of the cancer removed by surgery – about 60 to 90 percent. This innovative combination introduced the potential for curing the disease, even if the surgery didn’t get everything.

Exploring Surgery, Photodynamic Therapy, and Future Possibilities

The latest data showed something important about using PDT and surgery together. On one side, when researchers used both, the treatment worked better over time compared to only doing surgery. This means the chance of curing the cancer gets even better. But, on the other hand, the cuts from surgery could make the body’s defenses weaker when PDT is used.

These insights pave the way for future approaches. Researchers are now looking at potential methods to counteract the immunosuppressive effects brought on by surgery. By addressing this challenge, researchers want to make sure that the combination of surgery and PDT is as effective as it can be, ultimately offering improved results for patients battling malignant pleural mesothelioma.

Source

Davis, R. W., Klampatsa, A., Cramer, G. M., Kim, M. M., Miller, J. M., Yuan, M., Houser, C., Snyder, E., Putt, M., Vinogradov, S. A., Albelda, S. M., Cengel, K. A., & Busch, T. M. (2023). Surgical Inflammation Alters Immune Response to Intraoperative Photodynamic Therapy. Cancer Research Communications, CRC-22-0494. https://doi.org/10.1158/2767-9764.CRC-22-0494

 

Similar Posts

Doctors Describe "Concrete Therapeutic Approach" for Mesothelioma
| |

Doctors Describe "Concrete Therapeutic Approach" for Mesothelioma

ByAlex Strauss

A team of medical researchers in Italy have achieved what they are calling “excellent” tumor control and survival results in malignant pleural mesothelioma patients using a combination of surgery, chemotherapy, and radiotherapy. Caused by exposure to asbestos, mesothelioma typically spreads quickly across the lung-encasing membrane called the pleura. There is no known cure but treatments are improving. In the current prospective study, 20 malignant pleural mesothelioma patients underwent radical pleurectomy/decortication followed by high doses of radiation. After surgeons removed as much of the visible mesothelioma tumor and surrounding tissue as possible, patients received 50Gy of radiation to the effected side of their chest, delivered in 25 fractions. Regions of particular concern for mesothelioma regrowth got an extra radiation “boost” to…

Does Radiotherapy Reduce Mesothelioma Pain?
| |

Does Radiotherapy Reduce Mesothelioma Pain?

ByAlex Strauss

A new study says there is not enough evidence to support the use of radiotherapy for the treatment of pain associated with malignant pleural mesothelioma. Researchers at the University of Edinburgh in Scotland reviewed a range of past studies on mesothelioma pain and radiotherapy by searching databases that date back as far as 1974. To be eligible to be included in their review, the study had to focus on malignant pleural mesothelioma and radiotherapy given “with the intent of improving pain”. The study also had to report doses and fractionation of the radiotherapy and how the pain responded. In all, the researchers found eight studies on mesothelioma pain and radiotherapy that met the criteria. Two of the studies were prospective…

Ape Virus Shrinks Mesothelioma Tumors in Lab
|

Ape Virus Shrinks Mesothelioma Tumors in Lab

ByAlex Strauss

A virus that causes leukemia in gibbon apes may have the power to help fight malignant mesothelioma in people. Gibbon ape leukemia virus (GALV) has been tested for years as a viral vector, a carrier of therapeutic genetic information, in the treatment of various human illnesses, including cancer. A new study in Japan compared GALV with a leukemia virus derived from mice to see which carrier communicated most efficiently with mesothelioma cells. While both types of viruses replicated in most of the mesothelioma cell lines tested, the mouse-derived virus was not effective in a mesothelioma cell line called ACC-MESO-1. In this cell line, only the GALV spread efficiently both in culture and in mice that had been given human mesothelioma…

Radiotherapy for Mesothelioma: Better But Still Limited
| |

Radiotherapy for Mesothelioma: Better But Still Limited

ByAlex Strauss

A form of highly-targeted radiation therapy for mesothelioma is better than it used to be, but is still risky. That is the message of a recent article on intensity-modulated radiation therapy (IMRT) in Seminars in Thoracic and Cardiovascular Surgery. Author Kenneth E. Rosenzweig, MD, a Radiation Oncologist with Mount Sinai Hospital in New York, reviewed recent studies on IMRT and mesothelioma. He concludes that, while the “troubling toxicity” associated with IMRT when it was first introduced has not been entirely eliminated, the fact that clinicians now have more experience with it is making a positive difference for mesothelioma patients. Before targeted therapies like IMRT were available, high-dose radiation was not usually a feasible option for mesothelioma since the irregular shape…

A Second-Line Option for Mesothelioma?
| |

A Second-Line Option for Mesothelioma?

ByAlex Strauss

Although survival was not significantly extended, the chemotherapy drug vinorelbine might be a treatment option for mesothelioma patients whose cancer has returned after first-line chemotherapy with pemetrexed. A new study on vinorelbine as a second-line treatment finds that the drug is “moderately active” in mesothelioma patients who were initially treated with pemetrexed-based chemotherapy. Pemetrexed (Alimta), along with a platinum-based drug like cisplatin, is the primary first-line drug therapy for mesothelioma. But vinorelbine is gaining attention as a possible option for mesothelioma, in part because it is available in a less expensive generic form. In “Vinorelbine in pemetrexed-pretreated patients with malignant pleural mesothelioma”, the Italian authors detail the results of their study on 59 patients with unresectable pleural mesothelioma.  These patients…

Repeat HIPEC Improves Mesothelioma Survival
| |

Repeat HIPEC Improves Mesothelioma Survival

ByAlex Strauss

If one cytoreductive surgery and HIPEC procedure for mesothelioma is good, subsequent treatments may be even better. That is the central message of research conducted at the Moffitt Cancer Center in Florida. The study’s aim was to assess overall survival among peritoneal mesothelioma patients who had not just one, but two or more rounds of heated intraperitoneal chemotherapy (HIPEC) after cytoreductive surgery. The cytoreduction/HIPEC approach has become popular for peritoneal mesothelioma, a treatment-resistant cancer of abdominal membranes caused by asbestos. Cytoreductive surgery involves removing as much of the mesothelioma tumor as possible from the abdomen. Because the shape and spreading pattern of mesothelioma tumors make complete cytoreduction difficult, the surgery is often followed by a rinse with a heated solution…