Aggressive prostate cancer linked to five types of bacteria

It is hoped treatments can attack bacteria and slow down development of disease

Researchers have identified five types of bacteria that are linked to aggressive prostate cancer. PA

Researchers have identified five types of bacteria that are linked to aggressive prostate cancer.

The bacteria was common in urine and tissue samples from men with the condition, a study found.

It is hoped the findings could help to pave the way for treatments that could attack this bacteria and slow or prevent the development of aggressive disease.

Scientists do not yet know how people pick up the bacteria, or whether they are causing the disease.

“We already know of some strong associations between infections and cancer," said project lead Prof Colin Cooper, from the University of East Anglia’s Norwich Medical School.

“For example, the presence of Helicobacter pylori bacteria in the digestive tract can lead to stomach ulcers and is associated with stomach cancer, and some types of the HPV virus can cause cervical cancer.

“We wanted to find out whether bacteria could be linked to the way prostate cancer grows and spreads.

“While prostate cancer is responsible for a large proportion of all male cancer deaths, it is more commonly a disease men die with rather than from.

“And little is known about what causes some prostate cancers to become more aggressive than others.

“We now have evidence that certain bacteria are involved in this and are part of the puzzle.”

Actress Sofia Vergara had thyroid cancer when she was 28 years old. AFP

Hugh Jackman has been diagnosed with basal cell carcinoma, a malignant type of skin cancer, several times. AFP

US comedian Kathy Griffin was recently declared cancer free after having half her left lung removed. RB/Bauer-Griffin/GC Images

Michael C Hall had Hodgkin's lymphoma while filming hit TV series 'Dexter'. AFP

Former NBA star Kareem Abdul-Jabbar has had both prostate cancer and chronic myeloid leukemia. AFP

Actor Ben Stiller was treated for prostate cancer in 2014. AFP

Bollywood actress Sonali Bendre had metastatic cancer in her abdomen. AFP

Nepalese actress Manisha Koirala had ovarian cancer in 2012. AFP

British TV personality Sharon Osbourne was diagnosed with colon cancer in 2002, and also had a double mastectomy in 2012 after finding out she had the gene that increases risk of getting breast cancer. AFP

Khloe Kardashian has been treated for skin cancer in the past. AFP

Lebanese singer Elissa has famously discussed her journey with breast cancer. AFP

Egyptian actor Ahmed Helmy underwent treatment for cancer while his wife, Mona Zaki, was pregnant with their child. AFP

From left: Ahmed Helmy, Khloe Kardashian and Manisha Koirala have all opened up about their cancer journeys. Photos: Front Row, AP Photo, AFP

The team worked with researchers at the Norfolk and Norwich University Hospital, the Quadram Institute, and other collaborators to analyse urine or tissue samples from more than 600 patients with or without prostate cancer.

They developed methods of finding the bacteria associated with aggressive prostate cancer.

“We found several types of bacteria associated with aggressive prostate cancer, some of which are new types of bacteria never found before,” said Dr Rachel Hurst, lead author of the work and also from Norwich.

Two of the new bacteria species found by the team have been named after two of the study’s funders – Porphyromonas bobii, after the the Bob Champion Cancer Trust, and Varibaculum prostatecancerukia, after Prostate Cancer UK.

The set of bacteria found by the team include Anaerococcus, Peptoniphilus, Porphyromonas, Fenollaria and Fusobacterium.

All of the bacteria like to grow without oxygen present.

“When any of these specific anaerobic bacteria were detected in the patient’s samples, it was linked to the presence of higher grades of prostate cancer and more rapid progression to aggressive disease," Dr Hurst said.

“We also identified potential biological mechanisms of how these bacteria may be linked to cancer.

“Among the things we don’t yet know is how people pick up these bacteria, whether they are causing the cancer, or whether a poor immune response permits the growth of the bacteria.

“But we hope that our findings and future work could lead to new treatment options that could slow or prevent aggressive prostate cancer from developing.

“Our work could also lay the foundations for new tests that use bacteria to predict the most effective treatment for each man’s cancer.”

The researchers said many bacteria were beneficial to human life and it was not a simple matter to remove the harmful bacteria without removing the protection provided by the good bacteria.

The study, published in European Urology Oncology, was funded by the Bob Champion Cancer Trust and Prostate Cancer UK.