7, November 2021
Researcher in Cameroon develops plant-based leukemia treatment 0
Hundreds of thousands of people suffer from leukemia in all parts of the world, and many ultimately lose their fight against the disease. While there is currently no cure for leukemia, it is possible to treat the cancer to prevent it from coming back.
A biochemistry researcher at the University of Yaounde Medical School in Cameroon’s capital said she developed a plant-based solution to fight leukemia.
“My solution is to make xenografts by administering an aqueous extract of plant bark powder to mice capable of developing tumors,” Francine Tankeu told Anadolu Agency (AA). “We make them leukemic beforehand and then we follow their evolution.”
The next step is to arrange the remedy in a final physical aspect of the drug as it will be used in a patient and according to its compatibility.
“This other step includes several aspects such as toxicological studies to ensure its safety before moving to the human stage (of trials),” said Tankeu.
She noted results on animals show a significant regression of tumor volume after 30 days.
“The survival rate is good, but the test has not yet been performed on a human patient. The steps to be taken before clinical testing, like human trials, are not complete and I don’t have enough funds,” she said.
The idea to use plants came from her daily life, where she noticed a majority of the population uses traditional plant-based medicine for diseases.
“The beneficial effects of Syzygium Guineense, the plant I use, are not negligible because its activity is anti-leukemic. Beyond being used as a spice for local dishes, it is also used for the treatment of certain cancers,” she said.
‘Improved traditional medicine’
She figured if she could establish a scientific basis for the traditional use and formulate an improved traditional medicine, it would be “very useful.”
The methodology is “in tune with African socio-cultural realities” she said.
Tankeu wants to formulate “an improved traditional medicine” and to study the effects of the leafy forest plant when it is administered in conjunction with anti-cancer drugs to see if there would be a synergistic effect or a reduction in side effects from chemotherapy.
She received the Young Talent Award In 2020 from the For Women in Science in Sub-Saharan Africa program at the L’Oreal Foundation and UNESCO.
This prize allowed her to realize her work is “an effective contribution to the problem of cancer,” she said.
But the fight remains “vast, long and far from being won in view of the growing number of patients in the world as well as the obstacles to scientific research,” said Tankeu.
It is “very complicated in my country” for several reasons she told the Turkish news agency.
Notably, the lack of financial avenues, absence of technical platforms and prejudice against female scientists.
She noted that teachers prefer to work with male researchers because of perceptions that family responsibilities of women present obstacles.
In addition, “many children die before they are even put on treatment because the standard of living of the inhabitants is lower than the cost of examinations for an accurate diagnosis,” she said.
The number of cancer cases is increasing annually in Cameroon and diagnosis times are long – more than 60% of patients arrive at an advanced stage and treatment is expensive – according to the Health Ministry.
Tankeu also lamented about erroneous beliefs and perceptions
“It is a real barrier,” she said.
Despite the situation, the young biochemist said she views the future of her solution with “a lot of optimism, especially given the previous results.”
Source: Daily Sabah




















17, November 2021
Pfizer to allow generic versions of its Covid pill for poor countries 0
US pharmaceutical giant Pfizer on Tuesday announced a deal to make its prospective antiviral Covid-19 pill available more cheaply in the world’s least-wealthy countries.
Pfizer will sub-licence production of its promising Paxlovid pill to generic drug manufacturers for supply in 95 low- and middle-income nations covering around 53 percent of the world’s population.
Under the deal struck with the global Medicines Patent Pool (MPP), Pfizer — which also produces one of the most widely-used Covid vaccines with German lab BioNTech — will not receive royalties from the generic manufacturers, making the treatment cheaper.
The agreement is subject to the oral antiviral medication passing ongoing trials and regulatory approval.
The Pfizer drug is to be taken with the HIV medicine ritonavir.
Interim data from ongoing trials demonstrated an 89 percent reduction in the risk of Covid-19-related hospitalisation or death compared to a placebo, in non-hospitalised high-risk adults with Covid-19 within three days of symptom onset, said Pfizer.
Similar results were seen within five days of symptom onset, it added.
The Geneva-based MPP is a United Nations-backed international organisation that works to facilitate the development of medicines for low- and middle-income nations.
If approved, the pill could be on the market in “a matter of months”, MPP policy chief Esteban Burrone told AFP.
Pfizer also said Tuesday that it was seeking an emergency use authorisation, or EUA, in the US for the Covid pill.
HIV drug mix
Pfizer will forego royalties on sales in all countries covered by the agreement while Covid-19 remains classified as a Public Health Emergency of International Concern by the World Health Organization.
Last month, the WHO maintained the highest level of alert over the spread of the SARS-CoV-2 virus that causes Covid-19.
Paxlovid, or PF-07321332, is an investigational antiviral therapy designed to block the activity of the SARS-CoV-2-3CL protease — an enzyme that the coronavirus needs to replicate.
Taking it together with a low dose of ritonavir helps slow the breakdown of PF-07321332. It therefore remains active in the body for a longer period at a high concentration, to help combat the virus.
The pill could potentially help patients avoid severe illness, which can lead to hospitalisation and death, Pfizer said.
“We believe oral antiviral treatments can play a vital role in reducing the severity of Covid-19 infections, decreasing the strain on our healthcare systems and saving lives,” said Pfizer chairman and chief executive Albert Bourla.
While a multitude of vaccines have been rolled out in the pandemic, the hunt for treatments for those who have already caught the disease has not been as fruitful.
Agreement follows Merck deal
The MPP was founded by Unitaid, which works on innovations to prevent, diagnose and treat major diseases in poorer countries.
“During a pandemic, saving time means saving lives. This agreement could help us to reach more people more quickly as soon as the medicine is approved,” said Unitaid executive director Philippe Duneton.
Potential sublicensees have until December 6 to register an expression of interest.
The announcement comes after the MPP signed a similar voluntary licensing deal with Pfizer’s US rivals Merck & Co last month for its investigational oral antiviral medicine molnupiravir.
Subject to regulatory approval, the deal will help create broad access to molnupiravir in 105 low- and middle-income countries.
Pills are easier to make than vaccines, do not require a cold chain for delivery and can be self-administered by the patient.
In terms of relieving health systems by preventing hospitalisations, “it’s a game changer”, said Burrone.
He said pricing for the Pfizer pill had not yet been set, but said that “in a competitive environment… the prices tend to come down” to a low level.
Doctors Without Borders (MSF) meanwhile suggested it might cost around $700 per Pfizer treatment course, in line with molnupiravir.
The medical charity said it was disheartened by the deal, saying restrictive voluntary licences were no substitute for guaranteed global access to Covid tools to bring the pandemic under control.
Source: AFP