Day: April 22, 2025

Nature-based Activity is Effective Therapy for Anxiety and Depression, Study Shows

Photo by Charlotte Thomas on Unsplash

A prescription of gardening an allotment in the UK has shown promise as a means of improving health and well-being outside of conventional medical treatments. 

Green social prescribing is a practice whereby a healthcare professional refers a patient to community-based nature activities to help improve health and well-being beyond medical treatments. Currently these programmes are in a testing phase, but evidence is now pointing to the need for investment in this area to make it an additional option for patients across the country.

More than 220 participants were included in the programme, and their mental health status was evaluated before and after exposure to an organised programme of nature-based activities, such as horticultural and care farming, sport and exercise, and outdoor mindfulness and craft-based activities.

The majority of participants took part in the programme weekly between one and four weeks, five to eight weeks, and others between nine and 12 weeks.  The team used the Office of National Statistics  measures of personal well-being, as well as the hospital anxiety and depression scale (HADS) to understand if participants had made improvements.

Horticulture

Across the board, participants reported improvements in well-being and mental health. But participants in longer programmes – typically nine to 12 weeks – or took part in activities related to horticulture and care farming, showed greater improvements in mood and anxiety levels compared with those involved in shorter programmes – one to four weeks – or in activities such as outdoor crafts, creative and mindfulness-based sessions, or sport and exercise.

The signs of improvement were similar to those seen in short-term cognitive behavioural therapy (CBT), where someone might meet one-to-one with a therapist over a period ranging from six weeks to a year or more.

Professor Peter Coventry, Director of the University’s Mental Health and Addiction Research Group, said: “We have known for some time that nature has a positive impact on health and wellbeing, but in more recent years, a stronger evidence-base has grown that proves this to be true for mental health in particular.

“The fact that activities such as gardening, tending allotments, and care farming had the most impact on the participants in our study, demonstrated that it is not just about being passive in nature, but connecting with it in a meaningful way.  

“There is also something to be said for connecting with nature in the company of other people who live in the same place as you.  Anxiety and depression can often be born out of loneliness and feelings of disconnectedness, so it makes sense that taking part in shared activities close to home  – especially those that involve caring for and improving your local environment – can help lift mood and reduce anxiety.”

All ages

The study showed that these positive impacts were seen in all ages, which ranged from age 18 to age 85, and across genders.  Researchers are now calling for more investment to be made to support these community activities and the employment of green social prescribers that GPs and other health and social care professionals can refer their patients to.

Trish Darcy, research associate from the University’s Mental Health and Addiction Research Group, said: “This intervention might not work for everyone, but through an initial exploratory conversation a social prescriber will discuss with a patient or user of the service if nature-based activities would be suited to them, and for that choice to happen we need more investment to support these community-based activities”. 

“In our study 65% of participants were from low socioeconomic groups and we now know that not only can it help improve their mental health, but participation was high for  horticultural based activities in particular, meaning that not only is it good for the individual, but for the local community environment too.”

Test and learn

The evaluation, published in the journal Health & Social Care in the Community, was conducted in partnership with The HEY Smile Foundation and NHS Humber and North Yorkshire Integrated Care Board (ICB).

Dr Hannah Armitt a Clinical Psychologist and Clinical Lead for the Humber and North Yorkshire ‘test and learn’ programme said: “The research conducted in our region has the potential to enhance service delivery by connecting statutory services with local providers of nature based and outdoors activities. 

“It is important to evidence the potential of green space and nature to ensure clinicians and patients alike can harness the benefits of this wonderful free natural resource we have in abundance in Yorkshire and Humber.”

Positive outcomes

Anthony Hurd, Humber and North Yorkshire Green Social Prescribing Programme Manager, said “This work has not only shown the positive outcomes that nature-based activities have on mental health, it has also highlighted the role that community-based organisations play in supporting the health and wellbeing of communities. 

“As healthcare begins to move more into the community, and with a focus on prevention, the community-based organisations delivering activities such as gardening, care farming and walking groups need to be recognised as key players in our national health service and be resourced appropriately.”

Source: University of York

Research Identifies the Key to Pancreatic Cancer’s Extreme Aggressiveness

Pancreatic cancer. Credit: Scientific Animations CC BY-SA 4.0

Pancreatic cancer is one of the most aggressive cancers and has one of the lowest survival rates: only 10% after five years. One of the factors contributing to its aggressiveness is its tumour microenvironment, known as the stroma, which makes up the bulk of the tumour mass and consists of a network of proteins and different non-tumour cells. Among these, fibroblasts play a key role, helping tumour cells to grow and increasing their drug resistance.

Now, a study led by researchers from the Hospital del Mar Research Institute and other institutions has identified a new key factor contributing to this feature of pancreatic cancer: a previously unknown function of Galectin-1 protein inside the nuclei of fibroblasts. This discovery, published in the journal PNAS, offers new insights into the role of these cells in the progression of pancreatic cancer.

“The stroma is considered a key component in the aggressive nature of pancreatic cancer, as it interacts with tumour cells, protects them, and hinders the action of drugs. Moreover, stromal cells, particularly fibroblasts, produce substances that support tumour growth and dissemination,” explains Dr Pilar Navarro, coordinator of the Cancer Molecular Targets Research Group at the Hospital del Mar Research Institute and IIBB-CSIC-IDIBAPS. Until now, fibroblasts were known to secrete Galectin-1, a protein with pro-tumour properties. This study, however, shows that the molecule is also located inside fibroblasts-specifically in their nuclei-where it plays a key role in gene expression regulation.

The presence of this molecule activates fibroblasts, making them support tumour cell development. The researchers also discovered that “Galectin-1 can regulate gene expression in these cells at a highly specific level without altering the DNA sequence, through epigenetic control. One of the genes it regulates is KRAS, which plays a critical role in pancreatic tumours,” explains Dr Navarro. This gene is also present in tumour cells in 90% of patients, though in this case it is mutated. It is considered one of the main drivers of uncontrolled growth and tumour aggressiveness.

Designing new strategies

The team behind the study had previously identified the prominent role of Galectin-1 in pancreatic cancer. The newly discovered functions now pave the way for developing new strategies to tackle this type of tumour. “Until now, efforts have focused on inhibiting Galectin-1 secreted by the stroma surrounding the tumour. Now, we see that we also need to block the protein inside the fibroblast nuclei,” says Dr Neus Martínez-Bosch, researcher at the Hospital del Mar Research Institute. “We need to find new inhibitors that work inside fibroblasts, not just on the protein they secrete,” she adds.

To carry out the study, researchers worked with tissue samples from pancreatic cancer patients, allowing them to analyse the presence and function of Galectin-1 in fibroblast nuclei. They also performed in vitro experiments with human fibroblast cell lines, investigating the effects of inhibiting both the protein and the KRAS gene, and observed deactivation of these cells-effectively halting their cooperation with tumour cells.

Dr. Judith Vinaixa, also a researcher at the Hospital del Mar Research Institute and first author of the study, highlights the importance of these results: “We have confirmed the key role of Galectin-1 in the fibroblast cell nucleus, where it regulates the expression of multiple genes critical for cell behaviour.”. Dr. Gabriel Rabinovich, researcher at IBYME (CONICET) and the CaixaResearch Institute, adds: “The next steps will involve exploring therapeutic combinations that inhibit both extracellular and intracellular Galectin-1. This protein also participates in key processes such as blood vessel formation and resistance to immunotherapy. Therefore, this strategy becomes particularly relevant given the multiple antitumoral effects of Galectin-1 inhibition.”

Source: IMIM (Hospital del Mar Medical Research Institute)

Inside the SAMRC’s Race to Rescue Health Research in SA

Mycobacterium tuberculosis drug susceptibility test. Photo by CDC on Unsplash

By Catherine Tomlinson

Health research in South Africa has been plunged into crisis with the abrupt termination of several large research grants from the US, with more grant terminations expected in the coming days and weeks. Professor Ntobeko Ntusi, head of the South African Medical Research Council, tells Spotlight about efforts to find alternative funding and to preserve the country’s health research capacity.

Health research in South Africa is facing an unprecedented crisis due to the termination of funding from the United States government. Though exact figures are hard to pin down, indications are that more than half of the country’s research funding has in recent years been coming from the US.

Many health research units and researchers that receive funding from the US National Institutes of Health (NIH) have in recent weeks been notified that their grants have been terminated. This funding is being slashed as part of the efforts by US President Donald Trump’s administration to reduce overall federal spending and end spending that does not align with its political priorities.

Specifically, the administration has sought to end spending supporting LGBTQ+ populations and diversity, as well as equity and inclusion. As many grants for HIV research have indicators of race, gender, and sexual orientation in their target populations and descriptions, this area of research has been particularly hard hit by the cuts. There have also been indications that certain countries, including South Africa and China, would specifically be targeted with NIH cuts.

On 7 February, President Donald Trump issued an executive order stating that the US would stop providing assistance to South Africa in part because it passed a law that allowed for the expropriation of land without compensation, and separately because the South African government took Israel to the International Court of Justice on charges of genocide in Gaza.

Prior to the NIH cuts, some local research funded through other US entities such as the US Agency for International Development (USAID), and the Centers for Disease Control and Prevention (CDC) were also terminated.

How much money is at risk?

“In many ways the South African health research landscape has been a victim of its own success, because for decades we have been the largest recipients of both [official development assistance] funding from the US for research [and] also the largest recipients of NIH funding outside of the US,” says president and CEO of the SAMRC Professor Ntobeko Ntusi.

Determining the exact amount of research funds we get from the US is challenging. This is because funding has come from several different US government entities and distributed across various health research organisations. But the bulk of US research funding in South Africa clearly came from the NIH, which is also the largest funder of global health research.

According to Ntusi, in previous years, the NIH invested, on average, US$150 million – or almost R3 billion – into health research in South Africa every year.

By comparison, the SAMRC’s current annual allocation from government is just under R2 billion, according to Ntusi. “Our baseline funding, which is what the national treasury reflects [approximately R850 million], is what flows to us from the [Department of Health],” he says, adding that they also have “huge allocations” from the Department of Science, Technology and Innovation. (Previous Spotlight reporting quoted the R850 million figure from Treasury’s budget documents, and did not take the additional funds into account.)

How is the SAMRC tracking US funding terminations

Ntusi and his colleagues have been trying to get a clearer picture of the exact extent and potential impacts of the cuts.

While some US funding given to research units in South Africa flows through the SAMRC, the bulk goes directly to research units from international research networks, larger studies, and direct grants. Keeping track of all this is not straight-forward, but Ntusi says the SAMRC has quite up to date information on all the terminations of US research awards and grants.

“I’ve been communicating almost daily with the deputy vice-chancellors for research in all the universities, and they send me almost daily updates,” says Ntusi. He says heads of research units are also keeping him informed.

According to him, of the approximately US$150 million in annual NIH funding, “about 40%…goes to investigator-led studies with South Africans either as [principal investigators] or as sub-awardees and then the other 60% [comes from] network studies that have mostly sub-awards in South Africa”.

Figures that Ntusi shared with Spotlight show that large tertiary institutions like the University of the Witwatersrand, the University of Cape Town, and the University of Stellenbosch, could in a worst case scenario lose over R200 million each, while leading research units, like the Desmond Tutu Health Foundation and the Centre for the AIDS Programme of Research in South Africa, could each lose tens of millions. The SAMRC figures indicate that while many grants have already been terminated, there are also a substantial number that have not been terminated.

Where will new money come from?

Ntusi says the SAMRC is coordinating efforts to secure new funding to address the crisis.

“We have been leading a significant fundraising effort, which…is not for the SAMRC, but for the universities who are most affected [and] also other independent research groups,” he says. “As the custodian of health research in the country, we are looking for solutions not just for the SAMRC but for the entire health research ecosystem.”

Ntusi explains that strategically it made more sense to have a coordinated fundraising approach rather than repeating what happened during COVID-19 when various groups competed against each other and approached the same funders.

“Even though the SAMRC is leading much of this effort, there’s collective input from many stakeholders around the country,” he says, noting that his team is in regular communication with the scientific community, the Department of Health, and Department of Science, Technology and Innovation.

The SAMRC is also asking the Independent Philanthropic Association of South Africa, and large international philanthropies for new funding. He says that some individuals and philanthropies have already reached out to the SAMRC to find out how they can anonymously support research endeavours affected by the cuts.

Can government provide additional funds?

Ntusi says that the SAMRC is in discussions with National Treasury about providing additional funds to support health researchers through the funding crisis.

The editors of Spotlight and GroundUp recently called on National Treasury to commit an extra R1 billion a year to the SAMRC to prevent the devastation of health research capacity in the country. They argued that much larger allocations have previously been made to bail out struggling state-owned entities.

Government has over the last decade spent R520 billion bailing out state-owned entities and other state organs.

How will funds raised by the SAMRC be allocated?

One dilemma is that it is unlikely that all the lost funding could be replaced. This means tough decisions might have to be made about which projects are supported.

Ntusi says that the SAMRC has identified four key areas in need of support.

The first is support for post-graduate students. “There’s a large number of postgraduate students…who are on these grants” and “it’s going to be catastrophic if they all lose the opportunity to complete their PhDs,” he says.

Second is supporting young researchers who may have received their first NIH grant and rely entirely on that funding for their work and income, says Ntusi. This group is “really vulnerable [to funding terminations] and we are prioritising [their] support…to ensure that we continue to support the next generation of scientific leadership coming out of this country,” he says.

A third priority is supporting large research groups that are losing multiple sources of funding. These groups need short-term help to finish ongoing projects and to stay afloat while they apply for new grants – usually needing about 9 to 12 months of support, Ntusi explains.

The fourth priority, he says, is to raise funding to ethically end clinical and interventional studies that have lost their funding, and to make sure participants are connected to appropriate healthcare. Protecting participants is an important focus of the fundraising efforts, says Ntusi, especially since many people involved in large HIV and TB studies come from underprivileged communities.

Ultimately, he says they hope to protect health research capacity in the country to enable South African health researchers to continue to play a meaningful and leading role in their respective research fields.

“If you reflect on what I consider to be one of the greatest successes of this country, it’s been this generation of high calibre scientists who lead absolutely seminal work, and we do it across the entire value chain of research,” says Ntusi. “I would like to see…South Africa [continue to] make those meaningful and leading pioneering contributions.”

Republished from Spotlight under a Creative Commons licence.

Read the original article.

Study Finds that Titanium Particles are Common Around Dental Implants

Photo by Tima Miroshnichenko on Pexels

Titanium micro-particles in the oral mucosa around dental implants are common. This is shown in a new study from the University of Gothenburg, which also identified 14 genes that may be affected by these particles.

According to the researchers, there is no reason for concern, but more knowledge is needed.

“Titanium is a well-studied material that has been used for decades. It is biocompatible and safe, but our findings show that we need to better understand what happens to the micro-particles over time. Do they remain in the tissue or spread elsewhere in the body?” says Tord Berglundh, senior professor of periodontology at Sahlgrenska Academy, University of Gothenburg.

Found at all implants

Previous research has shown that titanium particles may occur in inflamed tissues around dental implants. The new study, published in Communications Medicine, showed that titanium micro-particles were consistently found at all examined implants—even those without signs of inflammation.

The researchers analysed tissue samples from 21 patients with multiple adjacent implants. Samples were taken both at healthy implants and at implants affected by peri-implantitis, an inflammatory disease in the tissue around the implant. Each patient thus served as their own control. The density of particles varied between patients, but not between sites with and without peri-implantitis within the same patient. The analyses were conducted in collaboration with Uppsala University, where researchers used an advanced method called µ-PIXE to map the distribution of titanium particles in the tissue samples.

Affected genes

Peri-implantitis is a microbial biofilm-associated inflammatory disease around dental implants, with features similar to those of periodontitis around teeth. The inflammatory process is complex and the resulting destruction of supporting bone in peri-implantitis may lead to loss of the implant. 

“We observed that tissue samples with higher concentrations of titanium particles had an altered gene expression, especially genes related to inflammation and wound healing. We identified 14 such genes, but it is unclear whether the particles influence the local immune response or if the difference in gene expression reflects inter-individual variability in inflammatory conditions,” says Carlotta Dionigi, specialist in periodontology and researcher at the Department of Periodontology, Sahlgrenska Academy, University of Gothenburg.

The researchers suspect that titanium particles are released during the surgical installation procedure, when the screw-shaped implant is inserted into the prepared canal in the alveolar bone. In this context, the observation on differences in micro-particle densities between various implant systems deserves attention, since the surface structure of the implant may influence the deposition of micro-particles. This is now an important topic for continued research.

Source: University of Gothenburg