Pancreatic adenocarcinoma remains a notably challenging cancer,with a five-year survival rate of just 10%. New research from Brazil sheds light on a key mechanism driving the aggressive spread of this disease, identifying a protein that actively reprograms healthy tissue to aid tumor invasion. The study, published in Molecular and Cellular Endocrinology, focuses on the role of periostin produced by pancreatic stellate cells and offers a potential new target for therapies aimed at improving outcomes for patients facing this deadly diagnosis.
Pancreatic adenocarcinoma, a particularly aggressive and deadly form of pancreatic cancer, has a grim prognosis, with mortality rates closely mirroring incidence rates. This means that nearly as many people die from the disease as are diagnosed with it each year.
Understanding the mechanisms behind this aggressive behavior is crucial for developing more effective treatments, and new research is shedding light on how the cancer spreads.
Table of Contents
- Brazilian Study Reveals Hidden Mechanism Driving Tumor Spread
- Why is Pancreatic Cancer So Deadly?
- Nerve Invasion: A Key to the Cancer’s Aggressiveness
- How Does the Tumor Reprogram Surrounding Tissue?
- The Role of Periostin in Facilitating Invasion
- A Microenvironment That Hinders Treatment and Supports the Tumor
- Nerve Invasion and Declining Survival Rates
- Periostin: A Promising Target for Precision Treatment
- A Step Toward Precision Medicine in Cancer Treatment
Researchers in Brazil have identified a key process that explains the particularly aggressive nature of pancreatic adenocarcinoma.
Published in the journal Molecular and Cellular Endocrinology, the study reveals that pancreatic stellate cells produce a protein called periostin. This protein alters the tissue surrounding the tumor, allowing it to invade nerves early on and spread rapidly. The findings suggest the tumor doesn’t simply grow within the pancreas, but actively reprograms healthy tissue to enhance its ability to invade and metastasize.
This research highlights the complex interplay between cancer cells and their surrounding environment, a critical area of study for improving cancer outcomes.
Why is Pancreatic Cancer So Deadly?
Adenocarcinoma accounts for approximately 90% of all pancreatic cancer cases, originating in the cells responsible for producing digestive enzymes.
While less common than other cancers, pancreatic adenocarcinoma is among the most fatal. Globally, around 510,000 new cases are diagnosed annually, with a nearly equivalent number of deaths. In Brazil alone, the National Cancer Institute (INCA) estimates approximately 11,000 new diagnoses and 13,000 deaths each year.
“Pancreatic cancer is an aggressive and difficult-to-treat disease, with a five-year survival rate of around 10% for patients,” says Dr. Pedro Luiz Serrano Osone Junior, an oncologist involved in the study.
Nerve Invasion: A Key to the Cancer’s Aggressiveness
The aggressiveness of this cancer is closely linked to a phenomenon known as perineural invasion, where cancer cells infiltrate along nerves and use them as pathways for spreading.
“Nerve invasion is a clear indicator of the cancer’s aggressiveness, causes severe pain for the patient, and facilitates the tumor’s spread to other parts of the body,” explains Dr. Osone.
How Does the Tumor Reprogram Surrounding Tissue?
The study was conducted at the Center for Research on Inflammatory Diseases (CRID), affiliated with the FAPESP Foundation, and led by researcher Carlos Alberto de Carvalho Fraga.
The team utilized advanced techniques to:
Analyze the activity of thousands of genes within individual cells.
Precisely pinpoint the location of these cells within the tissue.
After analyzing 24 pancreatic tumor samples, researchers found that the supporting tissue surrounding the tumor (the stroma) plays an active role in disease progression.
The Role of Periostin in Facilitating Invasion
The results showed that pancreatic stellate cells produce elevated levels of periostin, which is involved in:
Remodeling the extracellular matrix.
Disrupting the normal structure of tissues.
Preparing a path for cancer cells to invade nerves.
Researcher Helder Nakaya explained that nerves act as “highways” allowing the tumor to spread throughout the body.
A Microenvironment That Hinders Treatment and Supports the Tumor
These changes lead to what is known as a desmoplastic reaction, where a dense, inflamed layer forms around the tumor, resulting in:
Impeded access for chemotherapy.
Reduced effectiveness of immunotherapy.
A protective environment that helps the tumor survive and spread.
For these reasons, pancreatic cancer remains one of the most challenging cancers to treat.
Nerve Invasion and Declining Survival Rates
Dr. Osone notes that:
“More than 50% of pancreatic cancer cases exhibit nerve invasion in early stages.”
“This invasion is often not detected until after surgery.”
“Its presence indicates that the cancer cells have gained a high capacity for movement and migration.”
Periostin: A Promising Target for Precision Treatment
Researchers believe periostin represents a promising therapeutic target, as:
Inhibiting this protein
Or eliminating the stellate cells that produce it
May reduce nerve invasion and limit the tumor’s ability to spread.
Clinical trials are already underway for other types of cancer to test antibodies that target periostin, potentially opening the door to applying this strategy to pancreatic cancer.
A Step Toward Precision Medicine in Cancer Treatment
The researchers emphasize that this discovery supports the growing trend toward precision medicine, which focuses on the genetic and molecular characteristics of the tumor rather than just its type.
“In the future, we will treat patients based on the molecular changes in their tumors, not just on the location of the tumor. This represents a significant advancement in oncology,” concludes Dr. Osone.
