Health
Tiny golden bullets could help tackle asbestos-related cancers
Gold nanotubes — tiny hollow cylinders one thousandth the width of a human hair — could be used to treat mesothelioma, a type of cancer caused by exposure to asbestos, according to a team of researchers at the Universities of Cambridge and Leeds.
In a study published today in journal Small, the researchers demonstrate that once inside the cancer cells, the nanotubes absorb light, causing them to heat up, thereby killing the cells.
More than 2,600 people are diagnosed in the UK each year with mesothelioma, a malignant form of cancer caused by exposure to asbestos. Although the use of asbestos is outlawed in the UK now, the country has the world’s highest levels of mesothelioma because it imported vast amounts of asbestos in the post-war years. The global usage of asbestos remains high, particularly in low- and middle-income countries, which means mesothelioma will become a global problem.
“Mesothelioma is one of the ‘hard-to-treat’ cancers, and the best we can offer people with existing treatments is a few months of extra survival,” said Dr Arsalan Azad from the Cambridge Institute for Medical Research at the University of Cambridge. “There’s an important unmet need for new, effective treatments.”
In 2018, the University of Cambridge was awarded £10million from the Engineering and Physical Sciences Research Council to help develop engineering solutions, including nanotech, to find ways to address hard-to-treat cancers.
In a collaboration between the University of Cambridge and University of Leeds, researchers have developed a form of gold nanotubes whose physical properties are ‘tunable’ — in other words, the team can tailor the wall thickness, microstructure, composition, and ability to absorb particular wavelengths of light.
The researchers added the nanotubes to mesothelioma cells cultured in the lab and found that they were absorbed by the cells, residing close to the nucleus, where the cell’s DNA lies. When the team targeted the cells with a laser, the nanotubes absorbed the light and heated up, killing the mesothelioma cell.
Professor Stefan Marciniak, also from the Cambridge Institute for Medical Research, added: “The mesothelioma cells ‘eat’ the nanotubes, leaving them susceptible when we shine light on them. Laser light is able to penetrate deep into tissue without causing damage to surrounding tissue. It then gets absorbed by the nanotubes, which heat up and, we hope in the future, could be used to cause localised cancer-cell killing.”
The team will be developing the work further to ensure the nanotubes are targeted to cancer cells with less effect on normal tissue.
The nanotubes are made in a two-step process. First, solid silver nanorods are created of the desired diameter. Gold is then deposited from solution onto the surface of the silver. As the gold builds-up at the surface, the silver dissolves from the inside to leave a hollow nanotube.
The approach advanced by the Leeds team allows these nanotubes to be developed at room temperature, which should make their manufacture at scale more feasible.
Professor Stephen Evans from the School of Physics and Astronomy at the University of Leeds said: “Having control over the size and shape of the nanotubes allows us to tune them to absorb light where the tissue is transparent and will allow them to be used for both the imaging and treatment of cancers. The next stage will be to load these nanotubes with medicines for enhanced therapies.”
Story Source:
Materials provided by University of Cambridge. The original story is licensed under a Creative Commons License. Note: Content may be edited for style and length.
The West African Society of Parenteral & Enteral Nutrition (WASPEN) has called on President Bola Ahmed Tinubu to make clinical malnutrition a national healthcare priority, warning that the crisis is growing but remains largely overlooked in Nigeria’s healthcare system.
WASPEN’s Founder and President, Dr. Teresa Pounds, made this appeal on Monday during a press conference ahead of the 2025 WASPEN Clinical Nutrition Conference, scheduled for June 17–19 in collaboration with the National Hospital Abuja.
Themed “Bridging the Gap: Integrating Hospital and Community Malnutrition Care in Developing Countries,” the event aims to foster solutions for hospital and community malnutrition.
Describing malnutrition as “the skeleton in the hospital’s closet,” Dr. Pounds emphasised the need for urgent awareness, policy reform, and collaboration among healthcare stakeholders to ensure effective hospital nutrition programs.
“Many patients in Nigerian hospitals suffer from inadequate nutritional support, leading to prolonged hospital stays, increased complications, and higher mortality rates. This issue must be addressed at the highest level,” she stated.
The press conference was attended by the management of Genrith Pharmaceuticals Limited, a major partner, led by its CEO, Chief Emmanuel Umenwa.
Call for National Clinical Nutrition Policy
Dr. Pounds, a U.S.-based specialist in critical care nutrition and a board-certified nutrition support pharmacist, urged the government to implement a national policy framework to support specialised clinical nutrition interventions. She stressed the importance of integrating mandatory nutrition screening and intervention into all healthcare facilities.
She also called on the Federal and State Ministries of Health to expand and enforce standardised clinical nutrition policies, ensure hospitals conduct structured nutrition screening for all patients, makes medical nutrition therapy accessible and affordable, and support research and local production of specialised nutritional products.
She further encouraged NAFDAC, NIPRD, pharmaceutical companies, and NGOs to collaborate on research, funding, and product development to improve hospital and community-based nutritional care.
Invest in Africa’s food markets to win the war on hunger, boost nutrition – AfDB
“We need a national framework that ensures no patient suffers due to a lack of proper nutrition,” the expert stressed.
Conference to Attract Top Medical and Policy Experts
Speaking on the upcoming conference, Dr. Pounds noted that it will bring together leading medical experts, policymakers, and healthcare stakeholders to develop strategies for addressing malnutrition.
Prominent figures expected at the event include Prof. Ali Pate, Coordinating Minister of Health (Special Guest of Honour), Nyesom Wike, Minister of the FCT (Chief Host), Prof. Muhammad Raji Mahmud, Chief Medical Director, National Hospital Abuja (Host), Prof. Audu Bala, President, Nigerian Medical Association (Keynote Speaker), Pharm. Ibrahim Tanko Ayuba, President, Pharmaceutical Society of Nigeria (Guest of Honour), and Prof. Salisu Maiwada Abubaka, President, Nutrition Society of Nigeria (Guest of Honour) admiration.
Pre-Conference Activities
Prof. Raji Mahmud, Chief Medical Director of the National Hospital Abuja, represented by the Chairperson of the Local Organising Committee (LOC), Pharm. Adesola Clara assured that the hospital has the necessary facilities and expertise to host a successful conference. He emphasised that the hospital is fully prepared for the programme.
Also, the WASPEN Central Planning Committee, led by Mrs. Ghinsel Blessing, revealed that pre-conference activities will include a hands-on training workshop on nutritional kits in hospitals, scheduled for June 16, a health walk to raise awareness about hospital malnutrition, expected to be led by First Lady Sen. Oluremi Tinubu.
With malnutrition posing a silent but deadly threat to healthcare outcomes, WASPEN hopes that the Tinubu administration will take decisive action to integrate nutrition-focused interventions into Nigeria’s health policies.
The 2025 WASPEN Clinical Nutrition Conference is expected to be a game-changer in shaping the future of clinical nutrition in Nigeria and West Africa.
Two US biotech companies say the Food and Drug Administration has cleared them to conduct clinical trials of their gene-edited pig kidneys for human transplants.
United Therapeutics along with another company, eGenesis, have been working since 2021 on experiments implanting pig kidneys into humans: initially brain-dead patients and more recently living recipients.
Advocates hope the approach will help address the severe organ shortage. More than 100,000 people in the United States are awaiting transplants, including over 90,000 in need of kidneys.
United Therapeutics’s approval, announced Monday, allows the company to advance its technology toward a licensed product if the trial succeeds.
The study authorization was hailed as a “significant step forward in our relentless mission to expand the availability of transplantable organs,” by Leigh Peterson, the company’s executive vice president.
The trial will initially enroll six patients with the end-stage renal disease before expanding to as many as 50, United Therapeutics said in a statement. The first transplant is expected in mid-2025.
Meanwhile, rival eGenesis said it had received FDA approval in December for a separate three-patient kidney study.
“The study will evaluate patients with kidney failure who are listed for a transplant but who face a low probability of receiving a deceased donor offer within a five-year timeframe,” the company said.
Xenotransplantation — transplanting organs from one species to another — has been a tantalizing yet elusive goal for science.
Early experiments in primates faltered, but advances in gene editing and immune system management have brought the field closer to reality.
Pigs have emerged as ideal donors: they grow quickly, produce large litters, and are already part of the human food supply.
United Therapeutics said trial patients would be monitored for life, assessing survival rates, kidney function, and the risk of zoonotic infections — diseases that jump from animals to humans.
Currently, there is only one living human recipient of a pig organ: Towana Looney, a 53-year-old from Alabama who received a United Therapeutics kidney on November 25, 2024.
She is also the longest-surviving recipient, having lived with a pig kidney for 71 days as of Tuesday. David Bennett of Maryland received a pig heart in 2022 and survived 60 days.
The Swiss government said Thursday it aimed to overhaul its law on medically-assisted reproduction to legalise egg donations and give broader access to sperm donations.
Currently egg donations are not allowed and only married couples can access sperm donations.
The Swiss parliament has long said it wants to change that, and has asked the government with coming up with a proposal to provide broader access.
A government statement said it had “decided to completely revise the law on medically assisted reproduction in order to adapt it to the current context” and had asked the interior ministry to draft a proposed law by the end of next year.
The government said it wants to legalise egg donations in cases where a woman in a couple is infertile, as a parallel to the already legal use of sperm donations in cases of male sterility.
Bern said its priority was “the protection of donors and the welfare of the child”, stressing that “this protection cannot be guaranteed if parents resort to egg donation abroad”.
The government also said it wanted to expand access to both egg and sperm donation to unmarried couples.
After Switzerland legalised same-sex marriage in 2022, married lesbian couples have also had access to sperm donations.
But the government said the current law barring unmarried couples from access to such medically assisted reproduction was “outdated and no longer corresponds to social reality”.
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