I’m seeing two conflicting yet connected visions about the future. One is when journalist David Wallace-Wells says we might be in for “golden age for medicine,” with CRISPR and mRNA revolutionizing drug development. The second is the dystopian HBO hit “The Last of Us,” in which a fungal infection has turned much of the world’s population into zombie-like creatures.
Credit: HBO
The conflict is clear but the connection not so much.
Mr. Wallace-Wells never mentions fungi in his article, but if we’re going to
have a golden age of medicine, or if we want to avoid a global fungal outbreak,
we better be paying more attention to mycology – that is, the study of fungi.
We don’t need “The Last of Us” to be worried about fungal outbreaks. The Wall Street Journal reports:
Severe fungal disease used to be a freak occurrence. Now it is a threat to millions of vulnerable Americans, and treatments have been losing efficacy as fungal pathogens develop resistance to standard drugs.
“It’s going to get
worse,” Dr. Tom Chiller, head of the fungal-disease branch of the Centers for
Disease Control and Prevention, warns WSJ.
A new study
found that a common yet extremely drug resistant type of fungus -- Aspergillus
fumigatus – has been found even in a very remote, sparsely
populated part of China. Professor Jianping
Xu, one of the authors, points
out: “This fungus is highly ubiquitous — it’s around us all the time. We
all inhale hundreds of spores of this species every day.”
We shouldn’t be surprised, because fungi tend to
spread by spores In fact, according to
Merlin Sheldrake’s fascinating Entangled
Life: How Fungi Make Our Worlds, Change Our Minds, and Shape Our Futures, fungi
spores are the largest source of living particles in the air. They’re also in
the ground, in the water, and in us. They’re everywhere.
Without them, we’re nothing.
And that part about taking over animal’s brains, as in The Last of Us, is, in fact, true. For example, they are known to invade ants’ and mice’s brains, causing them to exhibit unusual behavior that gets the animal killed but cause the fungi to spread, which is their goal. As for influencing human’s behavior, the answer seems to be somewhere between “maybe” and “probably.” If you are a fan of hallucinogenic mushrooms, then the answer is “yes.”
In an
interview with The New York Times, Dr. Sheldrake argues: “Mycelium [networks of fungal threads] is
ecological connective tissue and reminds us that all life-forms, humans
included, are bound up within seething networks of relationships, some visible
and some less so.” We can ignore them, we can try to fight them, but failing
to recognize how we fit into those networks comes at our own risk.
“Fungi aren’t being
given enough thought,” Dr. Peter Pappas, an infectious-disease specialist at
the University of Alabama at Birmingham, told
WSJ. Dr. Andrej Spec, an
infectious-disease specialist at Washington University, agreed, adding: “In
medicine, fungi are an afterthought. We need a paradigm shift.”
Indeed. As WSJ went on to say:
Many medical schools aren’t adequately training aspiring doctors to identify and treat fungal disease, infectious-disease experts said. Some schools dedicate a couple of hours to the topic, those experts said. “Most fungal diseases are taught in medical school as being rare or unusual or some even regional, but we see these on a daily basis,” said Dr. George R. Thompson, an infectious-disease specialist at the UC Davis Medical Center in Sacramento.
I’m glad that we’re at least realizing the issues that
fungi can cause for our health, but I fear we’ll go down the same road we’ve
gone down with bacteria. We discovered they
could harm us, then found we could kill them, developing an array of
antibacterials that could wipe them out at scale, then proceeded to blithely overuse
them. To late, we eventually realized
that, duh, bacteria become resistant to them over time, and, even worse, we
need some bacteria.
We’re starting – barely – to recognize the importance
that our microbiome plays in our health, but we haven’t significantly changed
our medical education or our practice of medicine to recognize that role. We’re even further behind when it comes to
the mycobiome. If we’re barely teaching how
to identify and treat fungal diseases in medical school, imagine how much
further behind we are in how to use our fungal companions to bolster our
health.
Credit: Anders Nilson/The New Yorker |
Mr. Sheldrake and
others are looking at using, not killing, fungi. They can be used, for example,
to create antivirals, to break down pollutants, to create food, to build
materials (mycofabrication),
and even, as Mr. Sheldrake describes
in a new paper, to help us combat climate change through carbon
sequestration. They are not our enemy. They were here before us, and they’ll be here
long after us.
As Dr. Pappas said, we need a paradigm shift.
It’s amazing that we’ve cracked our genetic code, and even
more than we’re now able to edit it. It’s
astonishing how we can use imaging to watch our bodies – and even our brains –
function in real time, and can use those results to identify problems. It’s
exciting that we can use DNA fragments to detect cancers and other illnesses at
early stages. But we’re still stymied as
to what a “healthy” microbiome is and how that matters to us, much less how our
mycobiome interacts with it, and with “us.”
The fact of the matter is that our concept of “us” is
an illusion. We are a network, of our own DNA, cells and processes, and of all
the other organisms that coexist with us.
Our health is a network effect; we’re only healthy when that network is in
balance.
We’re not getting to a golden age of medicine and
biomedical innovation without fungi.