Category: immune system

World AIDS Day — December 1

World AIDS Day is a powerful reminder that the fight against HIV/AIDS is far from over. Despite remarkable progress in recent decades, millions of people worldwide are still living with the virus. At the same time, inequalities in access to prevention, diagnosis and treatment continue to cost lives.

Established in 1988 as the first international health-related awareness day, World AIDS Day has since served as a global call for informed action, early diagnosis, destigmatization and equitable care.

What We Know Today About HIV/AIDS

According to recent UNAIDS data, more than 39 million people are living with HIV globally — and thanks to modern treatments, they can live full and healthy lives.

The science is encouraging. Antiretroviral therapy (ART/ARVs) allows people on treatment to reach undetectable viral loads, which means they cannot transmit the virus (“Undetectable = Untransmittable”).

Yet despite this progress, new infections still occur — mainly in communities facing social exclusion, economic hardship, or limited access to healthcare services. At the same time, lack of information and persistent stigma remain major barriers that delay testing and treatment.

HIV & Cancer: An Important Connection

The link between HIV and several forms of cancer isn’t widely known, yet it is significant:

  • People living with HIV have a higher risk of cervical cancer due to the more persistent presence of HPV.
  • Increased risk is also observed for non-Hodgkin lymphoma, Kaposi sarcoma and several cancers associated with chronic viral infections.
  • Early diagnosis, continuous treatment and regular screening significantly reduce these risks.

At Kapa3, we have published articles on the importance of screening and patient empowerment, which you can find here: Article1, Article2, Article3, Article4, Article5.

The Situation in Greece

Greece has made important progress in recent years, thanks to the operation of Checkpoints, the support of NGOs and prevention structures, the spread of PrEP, and improved access to treatment.

In 2024, Greece recorded a small decrease (4%) in new HIV diagnoses compared to 2023, according to the Hellenic National Public Health Organization (EODY). However, underdiagnosis remains a real concern. Many people avoid timely testing due to stigma and fear of discrimination.

Prevention: What Each of Us Can Do

  • Testing: a simple test can save lives.
  • Condom use & comprehensive sexual education.
  • PrEP & PEP: modern and effective prevention tools.
  • Eliminating stigma: information and open dialogue remain our strongest forms of protection.
  • Supporting facilities that provide access to prevention, diagnosis and treatment.
A Human Rights Issue

At Kapa3, we believe World AIDS Day concerns all of us. Access to healthcare is a fundamental right. No one should be afraid to get tested, speak openly or seek support.

According to International Human Rights Law, discrimination based on HIV status, sexual orientation, gender identity or expression, health status (including substance use), or sex work constitutes a violation of human rights.

World AIDS Day reminds us that knowledge, prevention and solidarity save lives — and that a world without new HIV infections is possible.

Sources

  • UNAIDS
  • HIV.gov
  • AIDS Healthcare Foundation
  • EODY (Hellenic National Public Health Organization)

Text/Adaptation: Ifiyenia Anastasiou for Kapa3

Gut Microbiota: A Hidden Ally in Cancer Treatment

Our gut is home to trillions of microorganisms, collectively called the gut microbiota, which play a crucial role in digestion, immunity, and overall health. Excitingly, research is revealing that these tiny residents can also influence the effectiveness of cancer treatments—from immunotherapy to chemotherapy and beyond. Understanding this connection opens new possibilities for more personalized and effective cancer care.

Boosting Immunotherapy through Gut Microbes

Innovative therapies like CAR-T cell therapy, immune checkpoint inhibitors (ICIs), oncolytic viruses (OVs), and CpG-oligonucleotide immunotherapy have transformed cancer treatment in recent years. Studies show that the composition of gut microbiota can affect how well patients respond to these therapies.

For instance, certain bacteria—such as Ruminococcus, Faecalibacterium, and Akkermansia—are linked to better CAR-T outcomes, while broad-spectrum antibiotics may reduce therapy effectiveness. Similarly, gut microbes can enhance responses to ICIs by stimulating immune cells that attack tumors. OVs, which work by killing cancer cells and activating the immune system, also benefit from a healthy gut microbiota. Even CpG-based therapies are more effective when gut microbes activate immune pathways.

In short, a balanced gut microbiota can help “turn cold tumors into hot tumors,” making them more responsive to modern immunotherapies.

Gut Microbes and Traditional Treatments

Gut microbiota also affects chemotherapy and radiotherapy. Some microbes can influence drug metabolism, improving efficacy or reducing side effects. For example, bacteria like Enterococcus hirae and Barnesiella intestinihominis enhance the response to cyclophosphamide, a common chemotherapy drug, by activating immune cells.

On the other hand, disruptions in gut microbiota—often caused by antibiotics or radiation—can increase treatment toxicity, leading to issues like intestinal inflammation or mucositis. Promising strategies like fecal microbiota transplantation (FMT) and certain probiotics have shown potential to restore gut balance, reduce side effects, and improve overall outcomes.

Complementary Approaches: TCM and Probiotics

Traditional medicine can also benefit from gut microbes. Traditional Chinese Medicine (TCM) compounds, when processed by gut bacteria, can transform into more potent anti-cancer agents. Certain TCM herbs and formulas can also promote beneficial bacteria while suppressing harmful ones.

Similarly, probiotics, prebiotics, and synbiotics—foods or supplements that nourish or contain helpful bacteria—can support cancer treatment by strengthening gut immunity, reducing inflammation, and enhancing drug effectiveness. For example, in combination with chemotherapy or immunotherapy, synbiotics have been shown to reduce treatment-related side effects while boosting therapeutic benefits.

Emerging Strategies: Engineering the Microbiota

Beyond diet and probiotics, scientists are developing targeted microbiota interventions to fight cancer more precisely. These include:

  • Engineered microbes, designed to deliver anti-cancer agents directly to tumors.
  • Phage therapy, using viruses that selectively kill harmful bacteria.
  • Nanomedicine and OMVs (outer membrane vesicles), which can deliver drugs or immune-stimulating molecules to tumors while sparing healthy microbes.

These cutting-edge approaches are still under study, but they demonstrate the incredible potential of harnessing gut microbes to improve therapy effectiveness and reduce toxicity.

Looking Ahead: Precision Medicine and Microbiota

The future of cancer treatment may increasingly involve personalized microbiota strategies. By analyzing an individual’s gut bacteria and metabolites, clinicians could tailor therapies to maximize efficacy and minimize side effects. Combining microbiota profiling with multi-omics analysis, AI, and big data could allow doctors to predict treatment response and guide interventions in a way that was unimaginable just a decade ago.

While challenges remain—including differences in individual microbiotas, safety considerations, and regulatory hurdles—the potential is enormous. Gut microbiota represents a promising frontier in precision oncology, offering hope for more effective, safer, and individualized cancer care.

Read the full article here

Text/Adaptation: Ifiyenia Anastasiou for Kapa3