News | New Study Reveals Mechanism of Rapid Ovarian Cancer Spread: Cancer Cells "Recruit" Protective Abdominal Cavity Cells for Coordinated Invasion
Ovarian cancer is one of the gynecologic malignancies with the highest mortality rate, primarily because the disease is usually diagnosed at an advanced stage, when cancer cells have already spread extensively throughout the abdominal cavity. For a long time, the scientific community has known that ovarian cancer spreads at an unusually rapid pace, but the underlying biological mechanisms have never been fully explained.
Recently, a study from Nagoya University in Japan revealed this key puzzle. The researchers found that ovarian cancer cells do not act alone, but rather "recruit" mesothelial cells in the abdominal cavity as "partners," jointly forming mixed cell clusters that more efficiently invade surrounding tissues and enhance resistance to chemotherapy.
The related research findings were published in Science Advances.
Cancer Cells and Protective Abdominal Cavity Cells Form "Mixed Spheroids"
To understand how ovarian cancer spreads rapidly within the abdominal cavity, the research team analyzed the cellular composition of ascites fluid samples from ovarian cancer patients.
The results revealed that, contrary to the previous assumption that cancer cells float alone in the abdominal cavity, the majority of cancer cells actually attach to mesothelial cells and form tightly packed mixed cell spheroids.
The study estimated that approximately 60% of cancer cell spheroids contain "recruited" mesothelial cells.
Further investigation showed that ovarian cancer cells release a signaling molecule called TGF-beta 1, which can alter the state of mesothelial cells, causing them to produce spike-like structures. These structures can cut through surrounding tissue, creating channels for cancer cells to enter new tissues.
A Mode of Spread Different from Most Cancers
During the progression of ovarian cancer, some cancer cells detach from the primary tumor and enter the fluid environment of the abdominal cavity. This fluid continuously moves with breathing and body movements, thus carrying cancer cells to different regions of the abdominal cavity.
This mode of dissemination is markedly different from many other cancers. For example, breast cancer or lung cancer typically enters the bloodstream through blood vessels and metastasizes to distant organs via the circulation. Because the routes of blood circulation are relatively fixed, doctors can sometimes monitor the spread of these cancers through blood tests.
Ovarian cancer, however, largely bypasses the vascular system and spreads directly by floating in the abdominal cavity fluid. Since this fluid has no fixed direction of flow, the movement paths of cancer cells are difficult to predict, which also increases the difficulty of disease monitoring.
In the past, scientists did not know exactly what happened to cancer cells during this "floating stage," nor how they managed to complete metastasis so efficiently.
Mesothelial Cells Act as "Invasion Pioneers"
The research team found that during the floating stage, ovarian cancer cells actively recruit mesothelial cells shed from the peritoneum and bind with them to form mixed spheroids.
Within these mixed structures, mesothelial cells produce spike-like structures called "invadopodia." These structures can penetrate adjacent tissues like drills.
Once these mixed cell spheroids attach to the surface of a new organ, the mesothelial cells take the lead in opening invasion channels, and the cancer cells subsequently follow these paths into the tissue.
The researchers noted that compared to cancer cells existing alone, these mixed cell spheroids not only invade faster but also exhibit greater resistance to chemotherapeutic drugs.
Real-Time Observation of the Cancer Cell Spread Process
The research team used advanced microscopic imaging technology to observe the behavior of cells in patient ascites fluid in real time, and validated this mechanism through mouse model experiments and single-cell gene expression analysis.
Dr. Kaname Uno, the first author of the study and a visiting researcher at Nagoya University School of Medicine, stated that during this process, the cancer cells themselves do not need to undergo significant genetic or molecular changes.
He explained: "The cancer cells essentially manipulate the mesothelial cells to carry out tissue invasion. They themselves only need to move along the channels opened by the mesothelial cells."
Dr. Uno worked as a gynecologist for eight years before dedicating himself to research. He recalled that the experience of one patient profoundly influenced his research direction. This patient had normal examination results three months prior, but was subsequently diagnosed with advanced ovarian cancer, and ultimately could not be saved due to the rapid progression of the disease.
This experience prompted him to investigate why ovarian cancer spreads so rapidly and why existing screening methods struggle to detect it early.
New Directions for Future Treatment and Monitoring
The researchers believe that these findings provide new potential targets for ovarian cancer treatment.
Currently, most chemotherapeutic drugs primarily target the cancer cells themselves, but do not target the mesothelial cells that play a key role in the metastatic process.
Future treatment strategies may include:
Blocking the TGF-beta 1 signaling pathway
Preventing the formation of mixed cell clusters between cancer cells and mesothelial cells
In addition, the study proposes a new approach to disease monitoring: by detecting mixed cell spheroids in the abdominal cavity fluid, doctors may be able to more accurately predict the rate of ovarian cancer progression and the patient's response to treatment.
The researchers stated that these findings provide important clues for understanding the reasons behind the rapid spread of ovarian cancer, and also open new research directions for developing more effective diagnostic and therapeutic strategies.
Story source:
Collected from the internet
Author LinkedIVF TeamPublished 2026-03-08
This article used AI assistance; LinkedIVF has not recorded an editorial review for this item. It is not medical advice.
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News | New Study Reveals How Ovarian Cancer Spreads Rapidly: Cancer Cells Recruit Protective Abdominal Cells to Invade Together
News | New Study Reveals Mechanism of Rapid Ovarian Cancer Spread: Cancer Cells "Recruit" Protective Abdominal Cavity Cells for Coordinated Invasion
Ovarian cancer is one of the gynecologic malignancies with the highest mortality rate, primarily because the disease is usually diagnosed at an advanced stage, when cancer cells have already spread extensively throughout the abdominal cavity. For a long time, the scientific community has known that ovarian cancer spreads at an unusually rapid pace, but the underlying biological mechanisms have never been fully explained.
Recently, a study from Nagoya University in Japan revealed this key puzzle. The researchers found that ovarian cancer cells do not act alone, but rather "recruit" mesothelial cells in the abdominal cavity as "partners," jointly forming mixed cell clusters that more efficiently invade surrounding tissues and enhance resistance to chemotherapy.
The related research findings were published in Science Advances.
Cancer Cells and Protective Abdominal Cavity Cells Form "Mixed Spheroids"
To understand how ovarian cancer spreads rapidly within the abdominal cavity, the research team analyzed the cellular composition of ascites fluid samples from ovarian cancer patients.
The results revealed that, contrary to the previous assumption that cancer cells float alone in the abdominal cavity, the majority of cancer cells actually attach to mesothelial cells and form tightly packed mixed cell spheroids.
The study estimated that approximately 60% of cancer cell spheroids contain "recruited" mesothelial cells.
Further investigation showed that ovarian cancer cells release a signaling molecule called TGF-beta 1, which can alter the state of mesothelial cells, causing them to produce spike-like structures. These structures can cut through surrounding tissue, creating channels for cancer cells to enter new tissues.
A Mode of Spread Different from Most Cancers
During the progression of ovarian cancer, some cancer cells detach from the primary tumor and enter the fluid environment of the abdominal cavity. This fluid continuously moves with breathing and body movements, thus carrying cancer cells to different regions of the abdominal cavity.
This mode of dissemination is markedly different from many other cancers. For example, breast cancer or lung cancer typically enters the bloodstream through blood vessels and metastasizes to distant organs via the circulation. Because the routes of blood circulation are relatively fixed, doctors can sometimes monitor the spread of these cancers through blood tests.
Ovarian cancer, however, largely bypasses the vascular system and spreads directly by floating in the abdominal cavity fluid. Since this fluid has no fixed direction of flow, the movement paths of cancer cells are difficult to predict, which also increases the difficulty of disease monitoring.
In the past, scientists did not know exactly what happened to cancer cells during this "floating stage," nor how they managed to complete metastasis so efficiently.
Mesothelial Cells Act as "Invasion Pioneers"
The research team found that during the floating stage, ovarian cancer cells actively recruit mesothelial cells shed from the peritoneum and bind with them to form mixed spheroids.
Within these mixed structures, mesothelial cells produce spike-like structures called "invadopodia." These structures can penetrate adjacent tissues like drills.
Once these mixed cell spheroids attach to the surface of a new organ, the mesothelial cells take the lead in opening invasion channels, and the cancer cells subsequently follow these paths into the tissue.
The researchers noted that compared to cancer cells existing alone, these mixed cell spheroids not only invade faster but also exhibit greater resistance to chemotherapeutic drugs.
Real-Time Observation of the Cancer Cell Spread Process
The research team used advanced microscopic imaging technology to observe the behavior of cells in patient ascites fluid in real time, and validated this mechanism through mouse model experiments and single-cell gene expression analysis.
Dr. Kaname Uno, the first author of the study and a visiting researcher at Nagoya University School of Medicine, stated that during this process, the cancer cells themselves do not need to undergo significant genetic or molecular changes.
He explained: "The cancer cells essentially manipulate the mesothelial cells to carry out tissue invasion. They themselves only need to move along the channels opened by the mesothelial cells."
Dr. Uno worked as a gynecologist for eight years before dedicating himself to research. He recalled that the experience of one patient profoundly influenced his research direction. This patient had normal examination results three months prior, but was subsequently diagnosed with advanced ovarian cancer, and ultimately could not be saved due to the rapid progression of the disease.
This experience prompted him to investigate why ovarian cancer spreads so rapidly and why existing screening methods struggle to detect it early.
New Directions for Future Treatment and Monitoring
The researchers believe that these findings provide new potential targets for ovarian cancer treatment.
Currently, most chemotherapeutic drugs primarily target the cancer cells themselves, but do not target the mesothelial cells that play a key role in the metastatic process.
Future treatment strategies may include:
Blocking the TGF-beta 1 signaling pathway
Preventing the formation of mixed cell clusters between cancer cells and mesothelial cells
In addition, the study proposes a new approach to disease monitoring: by detecting mixed cell spheroids in the abdominal cavity fluid, doctors may be able to more accurately predict the rate of ovarian cancer progression and the patient's response to treatment.
The researchers stated that these findings provide important clues for understanding the reasons behind the rapid spread of ovarian cancer, and also open new research directions for developing more effective diagnostic and therapeutic strategies.
Story source:
Collected from the internet