Day: October 6, 2023

Opinion: This Court Case will Literally Determine whether Some People Get to Breathe

Photo by Wesley Tingey on Unsplash

By Aneesa Adams for Spotlight

In a pivotal case for access to affordable medicines in South Africa, the Treatment Action Campaign (TAC) and Doctors Without Borders (MSF) Southern Africa – represented by SECTION27 – earlier this year came together to help champion access to lifesaving new cystic fibrosis treatments.

Cheri Nel, a South African woman living with cystic fibrosis, and the Cystic Fibrosis Association started legal action against Vertex Pharmaceuticals earlier this year, challenging Vertex’s monopoly on the treatments. The TAC and MSF approached the court to be joined as amici curiae. Vertex, an American pharmaceutical company, holds the patents for both Trikafta and Kalydeco – medicines that have the potential to significantly improve the lives of cystic fibrosis patients. However, at a price of US $311 000 per year per patient in the United States (over R5 million), it is out of reach for most people living with cystic fibrosis.

The court application is for a compulsory licence, which, if granted, will mean another manufacturer of generics for Trikafta and Kalydeco would be permitted to enter the South African market. In this case, it is likely that competition between manufacturers would affect the price of this medicine, thus making it more accessible. A compulsory licence allows the holder of the license to produce a patented product without the patent holder’s consent.

Johannesburg-based investment banker Cheri Nel is the driving force behind a court case that may result in dramatically expanded access to life-changing new cystic fibrosis (CF) medicines. PHOTO: Supplied

Spotlight previously reported that Nel’s lawyers argued that by failing to register or supply their CF medicines in South Africa, make them available in South Africa at reasonable prices, or license other companies to supply the medicines, Vertex is abusing its patents. They further argued that Vertex’s actions are violating the Constitutional rights of people with cystic fibrosis in South Africa, including the right to health care. (Spotlight previously reported on the issue herehere, and here.)

Cystic fibrosis is a devastating multi-system illness known for causing frequent and severe lung infections, liver and pancreatic damage, lung failure, and can result in the potential need for lung transplants even in children from as young as two years old.

This case will set an important precedent that can influence access to medicines not only in South Africa but around the world. The involvement of SECTION27, where I work, underscores the broader issue of affordable access to medicines and the impact of intellectual property on healthcare access.

At present, MSF and TAC are awaiting the court’s decision to be admitted as friends of the court, while in the main application, the respondent (Vertex) has filed answering affidavits.

And while the clock is ticking in the courts, many families in South Africa are waiting and holding on to the glimmer of hope access to this medicine represents. For many who live with cystic fibrosis, a successful outcome of Nel and the Cystic Fibrosis Association’s application will mean a life where they can breathe easier.

Among those waiting is 6-year-old Janco Koorts.

A journey of hope

His mother, Tanya Koorts, says living with cystic fibrosis is like fighting every day for every breath. She says Janco had been diagnosed with cystic fibrosis at the age of two. She has since been on a mission to raise awareness about this life-threatening disease. It is hope, her family, and the support from the cystic fibrosis community that has kept her going, she says.

Reflecting on the start of their journey in the Northern Cape, she says, “The knowledge about cystic fibrosis is very little. We were lucky that Dr Jooste at the Kimberly public hospital diagnosed him so early on. After that, he sent us to the Red Cross Hospital in Cape Town and so our long journey of hope started.”

Later in a new job in a new city, the Koorts began again in Pretoria. They started Janco’s treatment at the Steve Biko Academic Hospital and then moved to the Charlotte Maxeke Johannesburg Academic Hospital.

“They don’t have much, but they do everything they can there to help. They also don’t have a lot of support but the people at Charlotte Maxeke helped Janco on his journey to stay breathing,” Koorts says, applauding the public health system.

Janco now has comprehensive medical aid which covers his monthly R48 000 medication bill and Koorts says she can now “breathe easier”. That, however, is just a fraction of the cost of living with cystic fibrosis.

When the Koorts family heard about Trixacar, a generic version of Trikafta, it only strengthened their resolve to save Janco’s life. The patent rights registered by Vertex Pharmaceuticals in South Africa, however, do not allow for the import of Trixacar. Trixacar is produced by the pharmaceutical company Gador in Argentina. Koorts will thus have to travel to Argentina to buy the medicine. This will cost about R400 000 to cover the travel costs and six boxes of Trixacar that will last six months, she says. (You can help the family fund this by donating here.)

‘a thief of joy’

Apart from the financial burden, having a young child with cystic fibrosis has affected the Koorts family mentally and emotionally.

“Cystic fibrosis is a thief of joy. Nobody speaks about fighting to save someone’s life,” says Koorts.

She says her family had to adjust to some of the social changes in their surroundings as well.

“At school, he has to fight for himself to stay alive. If we go to a restaurant and there are people smoking, it affects him and we have to move. So, as much as we have tried to give Janco a normal childhood, these social aspects will always hinder progress, and he is always reminded that he is sick. But I live in hope and so does he.”

In terms of her family relationships, Tanya says that her other children are healthy and for them to see their baby brother suffering every day hurts them.

“It’s painful as parents. Janco needs all the attention. I can’t go to a parent’s evening for my other kids. It’s difficult,” Koorts says.

She says she is proud of Janco.

“My child doesn’t know that he is dying. We fight every day so that Janco can have just one more breath.”

And that is ultimately what it is all about. From one perspective the exchange of documents in the High Court may seem abstract and full of legal technicalities. But let there be no doubt, for kids like Janco it is literally their futures that are being decided.

*Adams is a communications officer at SECTION27.

NOTEThis opinion piece was written by a staff member of SECTION27. Spotlight is published by SECTION27 and the TAC, but is editorially independent – an independence that the editors guard jealously. The views expressed in this piece are not necessarily those of Spotlight.

Republished from Spotlight under a Creative Commons Licence.

Source: Spotlight

High-accuracy, High-dose Radiotherapy Proves Effective against Prostate Cancer

Credit: Darryl Leja National Human Genome Research Institute National Institutes Of Health

Patients with intermediate risk, localised prostate cancer can be treated as effectively using fewer and higher doses of radiation therapy delivered over five treatment sessions as they can with lower doses delivered over several weeks, according to researchers from The Royal Marsden NHS Foundation Trust and The Institute of Cancer Research, London.

Significant reduction in treatment time

Results from the PACE B (Prostate Advances in Comparative Evidence) phase III randomised trial showed that stereotactic body radiotherapy (SBRT) performed as well as standard radiotherapy treatment for people whose prostate cancer had not spread, demonstrating a 96% chance of no disease progression within five years, compared to 95% for conventional radiotherapy.

SBRT, which can be delivered on a CyberKnife or standard radiotherapy machines, allows clinicians to target tumours to sub-millimetre precision. This approach uses advanced imaging and treatment planning techniques to deliver radiation with pinpoint accuracy, minimising damage to surrounding healthy tissue. It delivers five high doses of radiation to patients over one to two weeks, compared to standard radiotherapy, which delivers more moderate doses over a much longer period of time – usually around 20 sessions for patients in the UK, which can take up to one month.

Drawing from 38 centres across the UK, Ireland and Canada, researchers enrolled 874 people who preferred radiation treatment or were unsuitable for surgery. Patients were randomly assigned to receive either SBRT, consisting of five doses over one to two weeks, or standard radiation consisting of 20 doses over four weeks or 39 doses over 7.5 weeks. None of the patients received hormonal therapy.

“For something as serious as a cancer diagnosis, the treatment was incredibly easy”

The trial investigated whether SBRT was non-inferior to conventional radiation for treating people with intermediate risk, localised prostate cancer. Non-inferiority was measured by whether patients remained free of biochemical clinical failure (BCF), defined as an increase in prostate-specific antigen (PSA) levels, distant metastases or other evidence the cancer was returning, or death from prostate cancer.

Five years after treatment, people treated with SBRT had a BCF-event free rate of 95.7% compared to 94.6% for those treated with conventional radiotherapy, demonstrating that SBRT was non-inferior to conventional radiation.

Side effects were low in both groups and at five years not significantly different between treatment arms.

One patient who benefited from the treatment was 64-year-old Alistair Kennedy-Rose, who was diagnosed with prostate cancer in 2014 at his local hospital following a blood test which revealed his prostate-specific antigen levels were raised. Alistair was referred to The Royal Marsden and, after being recruited to the PACE-B trial, was treated with SBRT via CyberKnife.

He said: “When I was diagnosed I had no symptoms at all, so it came as quite a shock. There can be a lot of anxiety following a cancer diagnosis, but just ten days after I was referred to the Royal Marsden, I started SBRT. I still find it unbelievable that five days later I finished my treatment, for something as serious as a cancer diagnosis it was incredibly easy. I haven’t had any side effects and I’ve been able to live my life to the full. I can’t thank The Royal Marsden enough for what they have done for me.”

Source: The Royal Marsden

In Hearing Loss, How Hair Cells Lose Their ‘Hair’

In some cases of hearing loss, a cochlear implant is required. Photo by Brett Sayles

With age, many people will eventually need hearing aids. In some cases, the reason for this may be a signalling pathway that controls auditory sensory cell function and is downregulated with age. In the journal iScience, researchers at the University of Basel report the clues they have uncovered about this process, which may yield potential therapies to slow its progression.

Nearly everyone eventually experiences hearing loss: loud noises or simple aging gradually cause the auditory sensory cells and their synapses in the inner ear to degenerate and die off. The only treatment option is a hearing aid or, in extreme cases, a cochlear implant.

“In order to develop new therapies, we need to better understand what the auditory sensory cells need for proper function,” explains Dr Maurizio Cortada from the Department of Biomedicine at the University of Basel and University Hospital Basel. In collaboration researchers at the Biozentrum, Cortada investigated which signalling pathways influence the sensory hair cells in the inner ear. In the process, the researchers discovered a central regulator.

This signaling pathway, known by researchers as the mTORC2-signaling pathway, plays an important role, among other things, for cell growth and the cytoskeleton. The role it plays for the hair cells in the inner ear has not previously been studied.

When the researchers removed a central gene of this signalling pathway in the hair cells of the inner ear of mice, the animals gradually lost their hearing. By the age of twelve weeks, they were completely deaf, the authors report in the study.

Shortening ‘hair’ and fewer synapses

Closer examination indicated that the sensory hair cells in the inner ear lost their sensors without the mTORC2 signalling pathway: the distinctive fibre bundles known as stereocilia. Through electron microscopes, the researchers observed the shortening of stereocilia. The number of synapses that transmit the signals to the auditory nerve was also reduced.

“From other studies, we know that the production of key proteins in this signaling pathway decreases with age,” Cortada explains. There may be a connection to the loss of synapses and the reduced function of the auditory sensory cells in the inner ear that leads to hearing loss with increasing age.

“If this is confirmed, it would be a possible starting point for future therapies,” says the researcher. The middle and inner ear, for example, would be readily accessible for locally-administered medications or gene therapies. The results could pave the way for the development of such treatment options.

Source: University of Basel

A New Nasal Vaccine could be a Defence against Strep A

Photo by CDC on Unsplash

As Streptococcus A cases continue to be prevalent around the world, a new nasal vaccine could provide long-term protection from the deadly bacteria. Griffith University researchers are spearheading the development of a Strep A vaccine which is currently in Phase 1 clinical trials in Canada and quickly advancing to Phase 2 efficacy trials.

The team’s new preclinical research, recently published in Nature Communications, shows an experimental liposome-based vaccine approach incorporating a conserved M-protein epitope from Strep A and an immunostimulatory glycolipid (3D(6-acyl) PHAD) administered via the nasal passage, can provide long-term mucosal protection against Strep A.

Lead author Dr Victoria Ozberk said studies have shown most pathogens enter or colonise via the soft tissue in the upper respiratory tract, which is essentially the highway to the rest of the body.

“This has the potential to be a world-first as there are currently no subunit vaccines that target the upper respiratory tract due to a lack of licenced immunostimulants suitable for human use,” Dr Ozberk said.

“We demonstrated that a liposomal mucosal vaccination strategy can induce robust local protective immunity.”

Associate Professor Manisha Pandey, Professor Michael Good, and their team from Griffith University’s Institute for Glycomics are leading the development.

Associate Professor Pandey said the team found PHAD plays an augmenting role in inducing enduring humoral and cellular immunity, which was evident for at least one-year post-vaccination.

“The longevity of immune response is a critical hallmark of successful vaccination and therefore the findings from this study are highly significant,” she said.

Professor Good said: “In the future, this vaccine platform could pave the way for other mucosal pathogens.”

Group A Streptococcus is a global human pathogen that leads to a wide range of infections from illnesses such as mild pharyngitis and impetigo to invasive diseases such as toxic shock syndrome, necrotising fasciitis, and cellulitis.

Source: Griffith University

CRISPR Untangles the Connections between Genome Organisation and Autism

Photo by Peter Burdon on Unsplash

Using CRISPR gene editing, stem cells and human neurons, researchers have isolated the impact of a gene that is commonly mutated in autism. This new study, published today in The American Journal of Human Genetics, ties mutations in the gene CHD8 with a broad spectrum of molecular and cellular defects in human cortical neurons.

Autism is a highly heritable disorder with a recent increase in incidence – approximately 1 in 40 children in the US are diagnosed with autism. Over the past decade, sequencing studies have found many genes associated with autism but it has been challenging to understand how mutations in certain genes drive complex changes in brain activity and function.

The team, led by researchers at the New York Genome Center and New York University (NYU) and the Broad Institute, team developed an integrated approach to understand how mutations in the CHD8 gene alter genome regulation, gene expression, neuron function, and are tied to other key genes that play a role in autism. 

For more than a decade, it has been known that individuals with mutations in the CHD8 gene tend to have many similar ailments, such as autism, an abnormally large head size, digestive issues and difficulty sleeping. The CHD8 gene is a regulator of proteins called chromatin that surround the DNA but it is unclear how this particular gene might relate to major alterations in neural development and, in turn, result in autism. 

The research team identified numerous changes in physical state of DNA, which makes the genome more accessible to regulators of gene expression, and, in turn, drives aberrant expression of hundreds of genes. These molecular defects resulted in clear functional changes in neurons that carry the CHD8 mutation. These neurons are much less talkative: They are activated less often and send fewer messages across their synapses. 

The study authors initially observed these changes using human cortical neurons differentiated from stem cells where CRISPR was used to insert a CHD8 mutation. These findings were further bolstered by similar reductions in neuron and synapse activity when examining neurons from mice with a CHD8 mutation. These substantial defects in neuron function were circumvented when extra CHD8 was added to the cell using a gene therapy approach. In this case, extra copies of a healthy CHD8 gene without any mutation were added using a viral vector. Upon differentiation, the team found that the neurons rescued by the treatment returned to a normal rate of activity and synaptic communication, indicating that this gene therapy approach may be sufficient to restore function.

Lastly, when examining disrupted genes, the authors found that the CHD8 mutation seemed to specifically alter other genes that have been implicated in autism or intellectual disability, but not genes associated with unrelated disorders like cardiovascular disease. This suggest that CHD8 might influence selectively those genes that tend to be involved in neurodevelopmental disorders, providing an explanation for some of the particular characteristics of individuals carrying a CHD8 mutation.

Source: EurekAlert!