I agree, or at least I would stress that people should be allowed to consent to that.
I don't know what the prevailing medical ethics of doing that kind of thing in consenting patients
in that state, but my uninformed intuition is I would disagree with it.
Though one thing that I might think researchers might not want is people may be too sick to recover even if their cancer disappeared tomorrow.
In the US, the FDA has a Compassionate Use exemption to clinical trials for exactly this circumstance!
There must be informed consent, no reasonable alternatives (which, in cases we deem terminal, is often the case), and some evidence pointing to the treatment possibly being helpful. It's an excellent ethical program that gives patients a choice and advances science.
Actually, when in the lifecycle of developing a treatment does anyone have a real idea of what cost will be? Can anyone know this yet?
In terms of where _prices_ are set, that negotiation is a function of efficacy relative to other things in the market right? If it ends up treating cancers that each already have a reasonably effective treatment, maybe the pricing isn't that high -- but if it is effective in cases where currently there are no options, the price should be high?
But for something that potentially works against a range of cancers, should we expect to see a sequence of more specific trials (i.e. one phase 1 for basic safety, a bunch of phase 2s for efficacy on specific cancer types, a sequence of phase 3s in descending order of estimated market value? And in 10 years, Alice and Bob with different cancers will pay radically different amounts for almost exactly the same treatment but with small variations in some aspect of the formulation so they can be treated as distinct products?
Does the cost matter? Many countries subsidize healthcare, so there's either no charge or a token payment which doesn't even pretend to cover the cost of treatment.
Other countries use insurance, so once again the end cost is essentially irrelevant.
"When we systemically administered our nanoagent in mice bearing human breast cancer cells, it efficiently accumulated in tumors, robustly generated reactive oxygen species and completely eradicated the cancer without adverse effects ..."
So it kills human cancer and doesn't harm the mouse in the process.
Xenografted human tumors in mice != human cancer. The support structure of the tumor (tumor microenvironment) differs between model mice and humans, cells derived from human cancer that can be cultivated in a lab and xenografted differ from typical human cancer cells, and xenografting requires immunodeficient mice, just to name a few factors that affect treatment response.
Mice models of cancer are useful, but you should never be too surprised when something that works in mice doesn't work in the clinic, xenografting or no. Cancer is complicated.
Literally reactive oxygen species targets cancer cell DNA. We are taking advantage of the unique chemical environment of the inside of a cancer cell and using it to generate oxygen in a double-whammy to destroy itself.
This is perhaps the best targeted method devised as it seems to collect basically entirely in tumors. Chemo and Radio therapy just aren't that targeted.
Sounds promising, as always fingers crossed these sorts of new techniques produce positive results.
However, here are the problems that Gemini 3.1 pro identified:
1. The Scale of the Human Body: A mouse is tiny, meaning nanoparticles injected into its bloodstream circulate quickly and have a high chance of hitting the tumor. In a human, the circulatory system is vast. The human liver, spleen, and kidneys act as massive, highly efficient filters (the reticuloendothelial system) that often trap and clear metal-organic frameworks (MOFs) out of the body long before they ever reach the tumor.
2. Tumor Architecture: The mouse models used in these studies are usually "xenografts"—tumors grown rapidly over a few weeks under the skin. Human tumors develop over years, building dense, fibrous, scar-like tissue (stroma) and highly pressurized cores. Even if the nanoparticles reach the outside of a human tumor, they often cannot physically penetrate deep enough into the dense human tissue to eradicate the whole mass.
3. Immune System Differences: To grow human tumors in mice for testing, scientists often have to use immunocompromised mice (mice bred without an immune system so they don't reject the tumor). When you inject foreign iron-based nanomaterials into a human with an intact, highly aggressive immune system, the body may attack the particles, causing severe systemic inflammation or immune toxicity.
Targeted delivery of anti cancer methods is hard. Weather it is multiple radiation beams or anti-body cross linked chemo agents it’s never easy. Chemotherapy poisons the entire body but the cancer cells die faster. A generally administered compound that only affects cancer would be huge.
Though one thing that I might think researchers might not want is people may be too sick to recover even if their cancer disappeared tomorrow.
There must be informed consent, no reasonable alternatives (which, in cases we deem terminal, is often the case), and some evidence pointing to the treatment possibly being helpful. It's an excellent ethical program that gives patients a choice and advances science.
In terms of where _prices_ are set, that negotiation is a function of efficacy relative to other things in the market right? If it ends up treating cancers that each already have a reasonably effective treatment, maybe the pricing isn't that high -- but if it is effective in cases where currently there are no options, the price should be high?
But for something that potentially works against a range of cancers, should we expect to see a sequence of more specific trials (i.e. one phase 1 for basic safety, a bunch of phase 2s for efficacy on specific cancer types, a sequence of phase 3s in descending order of estimated market value? And in 10 years, Alice and Bob with different cancers will pay radically different amounts for almost exactly the same treatment but with small variations in some aspect of the formulation so they can be treated as distinct products?
Other countries use insurance, so once again the end cost is essentially irrelevant.
"When we systemically administered our nanoagent in mice bearing human breast cancer cells, it efficiently accumulated in tumors, robustly generated reactive oxygen species and completely eradicated the cancer without adverse effects ..."
So it kills human cancer and doesn't harm the mouse in the process.
Mice models of cancer are useful, but you should never be too surprised when something that works in mice doesn't work in the clinic, xenografting or no. Cancer is complicated.
This is perhaps the best targeted method devised as it seems to collect basically entirely in tumors. Chemo and Radio therapy just aren't that targeted.
However, here are the problems that Gemini 3.1 pro identified:
1. The Scale of the Human Body: A mouse is tiny, meaning nanoparticles injected into its bloodstream circulate quickly and have a high chance of hitting the tumor. In a human, the circulatory system is vast. The human liver, spleen, and kidneys act as massive, highly efficient filters (the reticuloendothelial system) that often trap and clear metal-organic frameworks (MOFs) out of the body long before they ever reach the tumor.
2. Tumor Architecture: The mouse models used in these studies are usually "xenografts"—tumors grown rapidly over a few weeks under the skin. Human tumors develop over years, building dense, fibrous, scar-like tissue (stroma) and highly pressurized cores. Even if the nanoparticles reach the outside of a human tumor, they often cannot physically penetrate deep enough into the dense human tissue to eradicate the whole mass.
3. Immune System Differences: To grow human tumors in mice for testing, scientists often have to use immunocompromised mice (mice bred without an immune system so they don't reject the tumor). When you inject foreign iron-based nanomaterials into a human with an intact, highly aggressive immune system, the body may attack the particles, causing severe systemic inflammation or immune toxicity.