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10 new things we’ve learned about cancer
Cancer's sweet tooth. Turning cancer cells into fat. Unveiling genetic secrets. Scientists are learning about cancer every day.
- Cancer is a leading cause of death among Americans, second only to heart disease.
- Researchers are unearthing cancer's genetic secrets and, with it, potential new treatments.
- Their efforts have seen the cancer death rate for men, women, and children fall year after year between 1999 and 2016.
The 21st century has been, and will continue to be, shaped by cancer. Although heart disease remains the United States' number one killer, cancer is quickly closing the gap and may soon surpass it. Some oncologists claim a cure is five, 10, certainly no more than 20 years away. Others aren't so sure because, in a way, cancer is the price we pay for evolutionary success.
"It is no coincidence that the very genes that allow our embryos to grow — our hands to grow, our feet to grow — if you mutate them in inappropriate contexts, [they] will ultimately release the disease that kills us," said oncologist Siddhartha Mukherjee, who dubbed cancer the Emperor of All Maladies, also the title of his Pulitzer Prize-winning book.
Whether for five years or forever, cancer won't be going anywhere any time soon. Yet, the more doctors and scientists discover about it, the better we can learn to live with it.
A love-hate relationship: Cancer and antioxidants
Contrary to what many believe, cancer enjoys a nutrient-rich diet as much as the next cell because it helps it grow, even those legendary antioxidants.
In two independent studies published in Cell, Swedish and American research teams found that lung cancer utilizes antioxidants to activate a protein called BACH1. This protein stimulates the cancer cells to metabolize glucose and accelerate metastasis. Even without a ready supply of dietary antioxidants available, the tumor would simply produce its own.
Professor Martin Bergo, who led the Swedish study, hopes this research will help develop new treatments. "We now have important new information on lung cancer metastasis, making it possible for us to develop new treatments, such as ones based on inhibiting BACH1," he said in a release.
Does this mean you should abstain from antioxidant-rich foods? Not at all. Antioxidants do neutralize the free radicals that cause oxidative stress on cells. Preventing such cell damage can help prevent cancer.
However, it's best to avoid antioxidant supplements unless prescribed by a doctor. As reported by the National Cancer Institute, of nine randomized-controlled clinical trials, none provided evidence that such supplements lower cancer risks. A few even found that beta-carotene supplements increased the risk of lung cancer so severely that the trials had to be ended prematurely.
Get your antioxidants from fruits, veggies, and beans instead. Research suggests that these antioxidants work in combination with additional molecules found in the whole foods. It's this tag-team effect that ultimately give antioxidants their salubrious power.
Cancer costs (in more ways than one)
It goes without saying that cancer is costly. The physical strain of treatment. The potential loss of life, whether one's own or the life of a loved one. And even if one survives, there's the emotional cost of the ordeal.
But the toll imposed by cancer is more than physical or psychological. A study released last year found "that 42 percent of patients deplete their life savings during the first two years of treatment." Of the 9.5 million newly diagnosed cancer patients surveyed, the study calculated average losses at $92,098.
Its authors dubbed the effect "financial toxicity" and concluded: "As large financial burdens have been found to adversely affect access to care and outcomes, the active development of approaches to mitigate these effects among already vulnerable groups remains of key importance."
Cancer's sweet tooth
A recent study found a positive association between a daily sugary drink and an increased risk of cancer.
Researchers asked more than 100,000 people to complete surveys looking at their usual consumption of 3,300 foods and beverages. The results? A positive association between daily consumption of a sugary beverage and an increased risk of cancer. The sugary drinks not only included soda but also 100 percent fruit juice and artificially sweetened drinks.
"These data support the relevance of existing nutritional recommendations to limit sugary drink consumption, including 100% fruit juice, as well as policy actions, such as taxation and marketing restrictions targeting sugary drinks, which might potentially contribute to the reduction of cancer incidence," the researchers stated in a release.
Don't go trashing the OJ just yet, though. As an observational study, the data could not establish a cause-effect relationship, and the researchers note the results are only preliminary. Additionally, the results hinge on the memories of the participants. (What exactly did you eat for breakfast the Monday before last?)
But the study helps stress the American Institute for Cancer Research's (AICR) suggestion to limit sugary beverages. Try to remove soda from your diet. Drink 100 percent fruit juices with no added sugar sparingly. And of course, enjoy an active, healthy lifestyle.
Cancer on the grill
It's a summer tradition to throw some meat on the grill alongside a good beer. But grilled meats hide a few furtive carcinogens: polycyclic aromatic hydrocarbons and heterocyclic aromatic amines.
The hydrocarbons are carried in the smoke after fat burns on the flame, while the heterocyclic amines form when sugars, amino acids, and creatine react at high heats. Neither has been proven to cause cancer, but they are known mutagens that can damage DNA after being metabolized.
"Research shows that diets high in red and processed meat increase risk for colon cancer," said Alice Bender, AIRC Senior Director of Nutrition Programs. "And grilling meat, red or white, at high temperatures forms potent cancer-causing substances."
Like sugary drinks, however, you don't have to forever hang up your "Kiss the Cook" apron. The institute has several suggestions for safe summer grilling, such as limiting red meat, marinating foods beforehand, keeping a low flame, and throwing more vegetables into the mix.
A unified theory of leukemia
Acute lymphoblastic leukemia (ALL) afflicts about one in 2,000 children, and Mel Greaves, at the Institute of Cancer Research, London, believes he's found the cause. Researching 30 years of data and medical literature on childhood leukemia, he argues the "delayed infection" is the culprit.
According to this theory, children develop a pre-leukemia mutation in utero. The mutation remains inert until later in life when the child encounters a common infection. The microbes then trigger secondary genetic changes that led to overt leukemia.
Does this mean children are safe only in cleanrooms? Strike that, reverse it. Greaves believes exposure to germs in the first year of life is proactive. It trains the immune system to deal with pathogens, therefore preventing the secondary mutation from triggering.
"Childhood ALL can be viewed as a paradoxical consequence of progress in modern societies, where behavioral changes have restrained early microbial exposure," Greaves writes. "This engenders an evolutionary mismatch between historical adaptations of the immune system and contemporary lifestyles. Childhood ALL may be a preventable cancer."
The future of cancer treatment is genetic
A major stride toward our understanding of cancer came with the Human Genome Project. Why? At its core, cancer is a genetic disease.
Our ability to sequence and read cancerous genomes will be a major step toward cancer treatments. As Eric Green, director of the National Human Genome Research Institute, told Big Think:
"[The] standard of care for many types of cancer is going to be: Get that tumor, read out its DNA, sequence its genome and based on what you've seen what's wrong with that tumor -- not by looking at it under a microscope only or by looking at it in a sort of a gross fashion but actually looking inside its blueprint -- you will be able to have a much better way of deciding what types of treatments to pursue and have a much better idea about what's wrong in that kind of tumor."
A future treatment? The "cancer vaccine"
An airman receives a vaccine. Could the future of cancer treatment be as easy as a shot?
Rather than using chemotherapy to combat cancer with the subtlety of an atomic bomb, immunotherapies aim to uncloak cancer cells, so the body's immune system can go on the offensive
One example of an immunotherapeutic approach is the so-called "cancer vaccine." During its clinical trial, 11 patients had a tumor injected with a steroid to bolster the site's dendritic cells — immune system cells that specialize in processing antigens.
Following a light dose of radiation and a stimulant, the patients' dendritic cells directed T-cells to attack the cancer cells. Once the T-cells could recognize the tumor, they became able to locate cancer cells throughout the body.
Of the 11 patients, three saw their cancer go into regression or remission. Six others had their cancer stymied for at least three months.
"It's really promising, and the fact you get not only responses in treated areas, but areas outside the field [of treatment with radiation] is really significant," Dr. Silvia Formenti, chairwoman of radiation oncology at Weill Cornell Medicine and New York Presbyterian, told CNBC. (Dr. Formenti was not involved in the study.)
Turning tumors into fat
Cancer cells spreading to other parts of the body through the circulatory system.
A deadly tool in cancer's arsenal is cell plasticity, a cell's ability to alter its physiological characteristics. It is one of the reasons cancers can metastasize throughout the body, and it helps the disease resist treatments.
Researchers at the University of Basel, Switzerland, have hijacked this ability and turned it against cancer. Using a drug therapy that combined an anti-diabetic drug and MEK inhibitors, they attacked cancer cells and turned them into adipocytes (a.k.a. fat cells).
While this did not remove the tumor, it did make the cells post-miotic, meaning they could no longer divide. This inhibited the cancer's ability to spread.
"In future, this innovative therapeutic approach could be used in combination with conventional chemotherapy to suppress both primary tumor growth and the formation of deadly metastases," senior study author Gerhard Christofori told Medical News Today.
An image of the E. coli bacteria. Will these become the next breakthrough in cancer therapies?
Another advancement in cancer treatment is synthetic biology, a field in which scientists use the principals of engineering to redesign biological systems. In one example, researchers genetically programmed a non-pathogenic E. coli strain to attack tumors in lab mice.
Once injected, the rewired bacteria took refuge in the tumor, where they self-destructed. These dead bacteria leaked from the tumor, and thanks to encoded nanobodies, drew the attention of T-cells which devoured the bacteria and tumor alike.
Of course, lab tests in mice do not guarantee a successful transition to human patients, but it remains a promising avenue for treatment.
"At some point in the future, we will use programmable bacteria for treatment," Michael Dougan, an immunologist at Massachusetts General Hospital, told the New York Times. "I think there's just too much potential."
A new attitude toward cancer
Medical professionals originally viewed cancer as a disease to be destroyed with extreme prejudice; the treatment was only better than the disease because the disease ended in death.
But as David Agus, professor of medicine and engineering at USC, told us, there are better ways to approach cancer:
"Well, to me cancer is a verb and not a noun. You're cancering, it's something the body does and not that the body gets. And so that philosophy needs a very different way of approaching disease, and it means changing the system in addition to trying to target the cancer."
One way is to approach treatment holistically. Agus points to a trial that gave premenopausal women with breast cancer a bone-building drug. The drug didn't target the cancer, yet it reduced recurrence by 40 percent because breast cancer metastasizes in bone.
Another method is psychosocial oncology. In this relatively new field, the practitioners' goal is to enhance the quality of life for cancer patients through mental health care as a part of physical care.
Living with cancer
Cancer death rates in the United States by cancer type, male and female, age standardized.
Scientists have learned a lot about cancer, but there remains much we don't know. Does that mean we should despair for the future? Quite the contrary. Thanks to the knowledge accumulated by scientists, we have much to be hopeful for.
Headlines are correct that the total number of new cancer cases and deaths continue to increase. However, the rates of cancer diagnoses and death have declined year after year. This is because absolute numbers don't account for metrics like population growth and increased life expectancy. In fact, the Annual Report to the Nation on the Status of Cancer found that the cancer death rate for men, women, and children fell year after year between 1999 and 2016, as did cancer incident rates.
"Death in old age is inevitable. The job of science is to prevent unanticipated deaths in unanticipated times. I find that is a perfectly reasonable goal," said Mukerjee. "If you're saying to me that we will have a more profound, more proximal reconciliation with cancer in the next few decades, I think the answer is absolutely yes."
We may not be able to eradicate cancer as we did with diseases like smallpox and polio. But we're learning how to live with it more and more every day.
- Organic food reduces cancer risk by 25% - Big Think ›
- Great white shark genome reveals clues about cancer - Big Think ›
- New therapy turns cancer into fat to stop its spread - Big Think ›
How would the ability to genetically customize children change society? Sci-fi author Eugene Clark explores the future on our horizon in Volume I of the "Genetic Pressure" series.
- A new sci-fi book series called "Genetic Pressure" explores the scientific and moral implications of a world with a burgeoning designer baby industry.
- It's currently illegal to implant genetically edited human embryos in most nations, but designer babies may someday become widespread.
- While gene-editing technology could help humans eliminate genetic diseases, some in the scientific community fear it may also usher in a new era of eugenics.
Tribalism and discrimination<p>One question the "Genetic Pressure" series explores: What would tribalism and discrimination look like in a world with designer babies? As designer babies grow up, they could be noticeably different from other people, potentially being smarter, more attractive and healthier. This could breed resentment between the groups—as it does in the series.</p><p>"[Designer babies] slowly find that 'everyone else,' and even their own parents, becomes less and less tolerable," author Eugene Clark told Big Think. "Meanwhile, everyone else slowly feels threatened by the designer babies."</p><p>For example, one character in the series who was born a designer baby faces discrimination and harassment from "normal people"—they call her "soulless" and say she was "made in a factory," a "consumer product." </p><p>Would such divisions emerge in the real world? The answer may depend on who's able to afford designer baby services. If it's only the ultra-wealthy, then it's easy to imagine how being a designer baby could be seen by society as a kind of hyper-privilege, which designer babies would have to reckon with. </p><p>Even if people from all socioeconomic backgrounds can someday afford designer babies, people born designer babies may struggle with tough existential questions: Can they ever take full credit for things they achieve, or were they born with an unfair advantage? To what extent should they spend their lives helping the less fortunate? </p>
Sexuality dilemmas<p>Sexuality presents another set of thorny questions. If a designer baby industry someday allows people to optimize humans for attractiveness, designer babies could grow up to find themselves surrounded by ultra-attractive people. That may not sound like a big problem.</p><p>But consider that, if designer babies someday become the standard way to have children, there'd necessarily be a years-long gap in which only some people are having designer babies. Meanwhile, the rest of society would be having children the old-fashioned way. So, in terms of attractiveness, society could see increasingly apparent disparities in physical appearances between the two groups. "Normal people" could begin to seem increasingly ugly.</p><p>But ultra-attractive people who were born designer babies could face problems, too. One could be the loss of body image. </p><p>When designer babies grow up in the "Genetic Pressure" series, men look like all the other men, and women look like all the other women. This homogeneity of physical appearance occurs because parents of designer babies start following trends, all choosing similar traits for their children: tall, athletic build, olive skin, etc. </p><p>Sure, facial traits remain relatively unique, but everyone's more or less equally attractive. And this causes strange changes to sexual preferences.</p><p>"In a society of sexual equals, they start looking for other differentiators," he said, noting that violet-colored eyes become a rare trait that genetically engineered humans find especially attractive in the series.</p><p>But what about sexual relationships between genetically engineered humans and "normal" people? In the "Genetic Pressure" series, many "normal" people want to have kids with (or at least have sex with) genetically engineered humans. But a minority of engineered humans oppose breeding with "normal" people, and this leads to an ideology that considers engineered humans to be racially supreme. </p>
Regulating designer babies<p>On a policy level, there are many open questions about how governments might legislate a world with designer babies. But it's not totally new territory, considering the West's dark history of eugenics experiments.</p><p>In the 20th century, the U.S. conducted multiple eugenics programs, including immigration restrictions based on genetic inferiority and forced sterilizations. In 1927, for example, the Supreme Court ruled that forcibly sterilizing the mentally handicapped didn't violate the Constitution. Supreme Court Justice Oliver Wendall Holmes wrote, "… three generations of imbeciles are enough." </p><p>After the Holocaust, eugenics programs became increasingly taboo and regulated in the U.S. (though some states continued forced sterilizations <a href="https://www.uvm.edu/~lkaelber/eugenics/" target="_blank">into the 1970s</a>). In recent years, some policymakers and scientists have expressed concerns about how gene-editing technologies could reanimate the eugenics nightmares of the 20th century. </p><p>Currently, the U.S. doesn't explicitly ban human germline genetic editing on the federal level, but a combination of laws effectively render it <a href="https://academic.oup.com/jlb/advance-article/doi/10.1093/jlb/lsaa006/5841599#204481018" target="_blank" rel="noopener noreferrer">illegal to implant a genetically modified embryo</a>. Part of the reason is that scientists still aren't sure of the unintended consequences of new gene-editing technologies. </p><p>But there are also concerns that these technologies could usher in a new era of eugenics. After all, the function of a designer baby industry, like the one in the "Genetic Pressure" series, wouldn't necessarily be limited to eliminating genetic diseases; it could also work to increase the occurrence of "desirable" traits. </p><p>If the industry did that, it'd effectively signal that the <em>opposites of those traits are undesirable. </em>As the International Bioethics Committee <a href="https://academic.oup.com/jlb/advance-article/doi/10.1093/jlb/lsaa006/5841599#204481018" target="_blank" rel="noopener noreferrer">wrote</a>, this would "jeopardize the inherent and therefore equal dignity of all human beings and renew eugenics, disguised as the fulfillment of the wish for a better, improved life."</p><p><em>"Genetic Pressure Volume I: Baby Steps"</em><em> by Eugene Clark is <a href="http://bigth.ink/38VhJn3" target="_blank">available now.</a></em></p>
A leading British space scientist thinks there is life under the ice sheets of Europa.
- A British scientist named Professor Monica Grady recently came out in support of extraterrestrial life on Europa.
- Europa, the sixth largest moon in the solar system, may have favorable conditions for life under its miles of ice.
- The moon is one of Jupiter's 79.
Neil deGrasse Tyson wants to go ice fishing on Europa<div class="rm-shortcode" data-media_id="GLGsRX7e" data-player_id="FvQKszTI" data-rm-shortcode-id="f4790eb8f0515e036b24c4195299df28"> <div id="botr_GLGsRX7e_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/GLGsRX7e-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/GLGsRX7e-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/GLGsRX7e-FvQKszTI.js"></script> </div>
Water Vapor Above Europa’s Surface Deteced for First Time<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="9c4abc8473e1b89170cc8941beeb1f2d"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/WQ-E1lnSOzc?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
A unique exoplanet without clouds or haze was found by astrophysicists from Harvard and Smithsonian.
- Astronomers from Harvard and Smithsonian find a very rare "hot Jupiter" exoplanet without clouds or haze.
- Such planets were formed differently from others and offer unique research opportunities.
- Only one other such exoplanet was found previously.
Munazza Alam – a graduate student at the Center for Astrophysics | Harvard & Smithsonian.
Credit: Jackie Faherty
Jupiter's Colorful Cloud Bands Studied by Spacecraft<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="8a72dfe5b407b584cf867852c36211dc"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/GzUzCesfVuw?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
Scientists discover burrows of giant predator worms that lived on the seafloor 20 million years ago.
- Scientists in Taiwan find the lair of giant predator worms that inhabited the seafloor 20 million years ago.
- The worm is possibly related to the modern bobbit worm (Eunice aphroditois).
- The creatures can reach several meters in length and famously ambush their pray.
A three-dimensional model of the feeding behavior of Bobbit worms and the proposed formation of Pennichnus formosae.
Credit: Scientific Reports
Beware the Bobbit Worm!<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="1f9918e77851242c91382369581d3aac"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/_As1pHhyDHY?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
The idea behind the law was simple: make it more difficult for online sex traffickers to find victims.