Ever wonder how scientists figure out a specific protein’s role in cancer?

Researchers use various methods, but I employ gene knockdown in my experiments. Basically, I use small RNA molecules that specifically target and degrade the mRNA of my gene of interest. This leads to a decrease in the corresponding protein levels, enabling me to observe the effects on neuroblastoma cell behaviour.

I feel a bit like Sherlock Holmes, you know? I’m selectively putting my suspect protein – the one I’m eyeing – under the spotlight to see how it’s pulling the strings on the cell’s behaviour. It’s like I’m in a cellular mystery, complete with a gene knockout magnifying glass 🔍🧬🕵

So, what I’ve been up to these past months is knocking down my protein and trying to find answers to the following questions:

Can neuroblastoma cells survive? And if not, how do they meet their demise? Do they go on a growth spree and start proliferating? Are they capable of migration? And here’s the twist – when my protein of interest takes a dip, do other proteins decide to change their expression levels?

The picture below can probably help you get an idea of what I’ve done so far. Do you see those brighter spots in Pictures A and B? Those are dead cells. Their number indicates the proportion of dead cells after a treatment. Picture A has just a few; the majority are healthy and well-spread cells. This is our negative control, a condition when we show neuroblastoma cells that have been transfected, but no gene knockdown happened. Transfection is the term for introducing small RNA molecules. Now, in Picture B, when we knocked down the protein, it caused the death of the cells, and you can clearly see that from all those many little bright spots.

We have found answers to many of the previous questions, but new questions have arisen, and we can’t wait to answer them!

Written by Federica Cottone

International Childhood Cancer Day – 15 February 2024

We are celebrating #ICCD2024 with a Bake Sale and a Quiz. To earn a piece of cake, you have to answer a question correctly! Have a look at some:

  • Which civilisation first described cancer?
  • Where did the word cancer come from?
  • Do children get cancer?
  • What is the most common type of cancer in children?
  • Can the Human Papillomavirus (HPV) vaccine prevent cancer?
  • Can neuroblastoma begin to develop before birth?
  • What is the name of the nerve cell in which neuroblastoma begins to grow?
  • Can a child have a genetic predisposition to neuroblastoma?
  • What % stands for the incidence of neuroblastoma: 8 or 15?
  • What % stands for the neuroblastoma-related deaths: 8 or 15?
  • Does neuroblastoma first appear in the brain?
  • What does the letter N stand for in the gene MYCN?
  • How often does childhood cancer occur compared to adults?
  • How often does hereditary cancer happen in general?
  • Do you think that children are small adults when we talk about anticancer treatment?

How things work in Science: Classifiers

For our next little series introducing a different thing in science and how it works every week, I decided to focus on classifiers. With artificial intelligence becoming more and more prominent in our daily lives as of late, I thought this would be a good lead into the explicitly science-focused topics to come. So, what is a classifier? How does it work? And why does it matter?

At their core, classifiers are algorithms designed to categorize input data into predefined classes or categories. They learn patterns and relationships from labelled training data to make predictions on new, unseen data.

Once features are extracted, identified and quantified from labelled or annotated input data, mathematical models are employed for pattern recognition and predictions.

These models can range from simple decision trees to complex neural networks, each with its own strengths and weaknesses.

Training these models is an iterative process. That means to produce one good classifier, lots of classifiers were created in the process: Every time the pattern recognition is run, the annotated data is categorised by the classifier and compared to the annotation class. Prediction errors are corrected, and performance is optimised. This whole process is one iteration. How many iterations are required for a well-trained classifier varies widely and is largely dependent on the input data and application. For my tissue classifiers, it took up to 20,000 iterations.

Classifiers use these models to categorise unseen data into categories the user-defined at the start. In the figure, you can see my annotated histological slides from which the classifier extracted patterns to then classify the rest of the slide and entirely unseen slides into tumour (red), stroma (green) and background (blue) classes.

From identifying fraudulent transactions, filtering out junk mail, targeted advertising, and facial recognition to unlock your phone or diagnosing diseases, classifiers play a vital role in automating decision-making processes and driving advancements across a wide range of industries. Keep your eyes peeled, and you can find more classifiers in action all around you.

Written by Ronja Struck

Goodbye 2023, Hello 2024!

So, the new year has just started! What would it bring us? Who will we meet? What will we write in my notebook? Will we be busy bees as usual or experience a new level of business/laziness? Let’s check this in 12 months!

Goodbye 2023, Hello 2024!

Women in Science: Dr. Margaret Jane Pittman

In the world of scientific research, Dr. Pittman’s name stands out. She was a bacteriologist and one of the founders of vaccines against infectious diseases such as typhoid, cholera, whooping cough and meningitis. Dr. Pittman achieved another incredible feat as the first woman to give rise to a National Institutes of Health Laboratory in the US. This accomplishment dispelled the persistent gender stereotypes that had long prevented women from pursuing careers in STEM and showcased her extraordinary credentials and experience.

Margaret J. Pittman, 1947

Dr. Margaret Jane Pittman was born on January 20, 1901, and grew up in Prairie Grove, Arkansas. Dr Margaret Pittman graduated magna cum laude from Hendrix in 1923. In 1925, she took her first course in bacteriology. At the time, it was propitious. Later in the nineteenth century, bacteriology became a distinct biological science. She got her Ph.D. from the University of Chicago in 1929 and started working for the National Institutes of Health in 1936. She developed, assessed, and standardised immunisation programmes against cholera, whooping cough, typhoid, and other diseases during most of her career. She continued to work at NIH as an unpaid guest. She occasionally served as a consultant for the World Health Organisation and as a guest scientist in several countries, including Spain, Scotland, Egypt, and Iran.

Her work and relentless efforts have revolutionised the world of vaccines and immunisation. Dr Pittman’s Haemophilus influenzae study has significantly influenced the medical field. Based on her research, numerous lives have been saved due to the creation of potent vaccinations, which has led to a notable drop in diseases linked to Haemophilus influenza. Pittman’s collaborations with esteemed scientists like Drs. Jonas Salk and Albert Sabin were essential in creating vaccinations against polio. They collaborated to carry out a great deal of research and clinical testing, which led to the development of the first effective polio vaccine. This enormous accomplishment was a game-changer in the global battle against polio, saving countless lives.

CREDIT: NATIONAL MUSEUM OF AMERICAN HISTORY
Margaret Pittman and fellow NIH physician Sadie L. Carlin are “reading” an agglutination reaction, part of the test for potency of commercially prepared anti-meningitis serum during the meningitis epidemic of 1935-1937 (1937).

As a woman in a male-dominated field, Margaret Pittman faced numerous challenges throughout her career. In an era when gender bias was pervasive, women struggled with standardisation and opportunities for advancement in scientific research. Pittman’s journey was the same, as she faced challenges that would have prevented her from moving further. The legacy of Dr. Margart Jane Pittman endures today, as her contributions continue to influence the direction of immunisation research. She stated that revolutionising problems with pertussis immunisation makes this work one of my best accomplishments that “despite the problems that have occurred with the pertussis vaccine… I consider this work one of my best accomplishments.”. Her partnerships and contributions have established a standard for upcoming generations and cleared the path for additional developments in vaccine research. By honouring her outstanding accomplishments, we can ensure that her influence on public health continues to be a driving force in the battle against infectious illnesses.

Written by Rabia Saleem

Congratulations to Dr Cat Murphy!

November 22, 2023 – Catherine was officially coined Dr Catherine Murphy. A Big Day for Catherine, her family and me.

Catherine joined our team in July 2019 to carry out a research project funded by Neuroblastoma UK. In this project, she aimed to use 3D culturing to engineer a novel experimental model and study the biology and immunology of neuroblastoma, an aggressive childhood cancer. There was the full spectrum of challenges and hard work spiced up with the uncertainty of the COVID-19 restrictions!

The PhD journey is never a straight line. It has a range of colours with 50+ shades for each. There are black alleys and hidden cul de sacs. Between July 2019 and June 2023, some days were sunny and bright, and some had scattered showers, gale winds and stormy snow, with sunshine developing elsewhere. The journey was spiced up with publications, conferences, travels, days out and fundraising events with the team.

Of note, she was behind our Twitter activities and blogging #AskCat, making our team visible! All these together have moulded into a new multi-skilled professional – Dr Catherine Murphy!

Well done to Catherine! Wish you the best of luck in your new adventure!

Women in Science: Mary Golda Ross

A woman from a background of adversity cannot be shaken when confronted with resistance. Mary Golda Ross was, “the kind of person who would walk through a door and stick in her foot to make sure that it stayed open for others”. She followed her passion and held her own to become the first Native American female engineer in the 1940s. Ross was a pioneer of rocket science and was an integral part of, still to this day, classified research on interplanetary space travel.

Mary Golda Ross was the great-great-granddaughter of John Ross, the chief of the Cherokee nation. About 70 years before Mary was born, John was tirelessly resisting the seizure and erasure of Cherokee lands and culture by the U.S. Government. In 1838, due to the Indian Removal Act, tens of thousands of Cherokee were forcibly removed from their homes and forced to march over 1,200 miles (about 1,930 kilometers) into present-day Oklahoma. Thousands died during the journey. Mary was born in Park Hill, Oklahoma in 1908. As a student in the Cherokee Nation, Mary was very bright and caught on to mathematics quickly. During her university classes, Mary was ostracized for her interest in STEM as she found herself alone on one side of the classroom with the men on the other. As was the case with many women in science at the time, she both learned and excelled academically with a massive lack of support.

Courtesy of the Smithsonian Institution, USA.

After receiving her bachelor’s degree, Mary held teaching positions and became a statistical clerk at the Bureau of Indian Affairs. While working, she took astronomy classes at the present-day University of Northern Colorado and earned her master’s degree in mathematics in 1938. A full 100 years after the Trail of Tears. Soon after, World War II had started and Mary moved to California to help with the war efforts, as 1 in 4 women worked outside the home during this period. She was hired as a mathematician in 1942 by Lockheed Aircraft Corporation, an aerospace engineering company. Her first project was analyzing the effects of pressure on the design of the P-38 Lightning, the fastest fighter jet in the world at the time, reaching speeds of 400 mph (640 km/h) in a level flight. Mary’s ambition did not stop there as she began to wonder how to become involved in space travel.

When the war ended, Lockheed saw her brilliance and sent her to UCLA where she earned a professional certification in engineering in 1949. Carrying on her engineering work in 1952, Mary helped found Lockheed’s Advanced Development Program, otherwise known as Skunk Works. She was the only woman engineer on this team, and most of the research from this program is still classified. However, it is known that Mary developed technology for space exploration and orbiting satellites. Mary’s work also helped develop the Agena spacecraft used in the Gemini and Apollo space missions. In 1966, Mary was a primary author for NASA’s Planetary Flight Handbook Vol. III, a still relevant source for space travel. Even suggesting the possibility of travelling to Mars and Venus.

Courtesy of San Diego Air and Space Museum, USA.

Mary retired in 1973 and was influential in both the American Indian Science and Engineering Society and the Society of Women Engineers. She worked hard to encourage increased participation of Native American youth in STEM fields. As of 2021, there are less than 1% of Native Americans that comprise the STEM workforce; only 2% of the U.S. population is Native American. She advocated for more resources offered to Native Americans interested in STEM and increased knowledge of her ancestors’ history. Mary attended the 2004 opening of the Smithsonian National Museum of the American Indian in Washington, D.C., wearing a traditional Cherokee dress. Upon her death in 2008, Mary endowed the museum with $400,000. Mary had told the Los Altos Town Crier, “The museum will tell the true story of the Indian – not just the story of the past, but an ongoing story”. Mary had dreams that reached the stars, and she never stopped chasing them. She trailblazed a path for those who followed in her footsteps to find a way, no matter what barriers were present.

Written by Alysia Scott.

Women in Science: Dr. Nina Marie Tandon

Throughout history, women in science have faced the hard challenge of navigating societal biases and limited opportunities in their pursuit of scientific discovery. Many of them were unjustly denied access to education and research positions just because of their gender, as it was thought that women were not capable of rigorous scientific work.

In the present, women in science (and in many other fields) still need to face many obstacles and challenges:

  1. Gender Bias: Women in science still encounter bias and stereotypes that can hinder their progress. They may face scepticism about their abilities and qualifications, leading to a lack of recognition for their work. Gender bias can also manifest in subtle ways, affecting opportunities for advancement and funding.
  2. Unequal Pay: Gender pay gaps persist in many scientific fields, with women often earning less than their male counterparts for similar work and qualifications.
  3. Limited Representation in Leadership Roles: Women remain underrepresented in leadership roles within academia, research institutions, and industry.
  4. Work-Life Balance: Balancing a career in science with family responsibilities can be particularly challenging for women. The demands of research, long working hours, and frequent travel can conflict with traditional gender roles and family expectations.

A woman and scientist who has certainly not let herself be stopped by all these adversities is Dr. Nina Marie Tandon. She has been a key player in the field of biomedical engineering, tissue engineering, and regenerative medicine. Her work focuses on developing innovative methods to grow artificial organs and tissues, using patient’s own cells to engineer tissues and organs. One of the cornerstones of Tandon’s work is the use of induced pluripotent stem cells. iPCs were developed in Japan pretty recently and are derived from skin or blood cells that have been reprogrammed back into an embryonic-like pluripotent state. This enables the development of an unlimited source of any type of human cell needed for therapeutic purposes.  

Tandon and her team employ cutting-edge bioreactors and 3D printing techniques to construct tissues: bioreactors provide a controlled environment for cells to grow and develop into specific tissue types, while 3D printing technology is used to create complex structures that mimic the architecture of natural organs.

In 2013, Tandon co-founded EpiBone, a biotech company that specializes in growing personalized bone grafts. EpiBone employs patient-specific stem cells to create skeletal structures based on individual DNA profiles, reducing the risk of rejection, streamlining surgical procedures, and potentially expediting patient recovery. They use a three-step process that begins with obtaining bone measurements and stem cells from abdominal fat via a CT scan, followed by creating a bone model in a bioreactor to stimulate growth. Finally, the patient’s own stem cells are added to the newly developed bone in the bioreactor, resulting in a fully functional replica bone ready for use.  Nina Tandon is also known for her engaging and informative TED Talks, where she discusses the future of medicine, tissue engineering, and the impact of regenerative medicine on healthcare.

I really admire Nina’s work, which I find genuinely fascinating. I believe her passion and determination come through in her TED talks, where she effectively manages to communicate complex scientific concepts and the potential of regenerative medicine to a broad audience.

Click on the image to listen to one of her TED talks. Enjoy it 🙂

Written by Federico Cottone

Women in Science: Rosalind Franklin

On a blog post series of Women in Science by a Cancer Bioengineering lab, you didn’t think you were going to get around reading about Rosalind Franklin, did you? In recent years, she finally started to receive the acknowledgement she is owed, placing her all the way up there in terms of famous scientists with Marie Curie and Albert Einstein.

As mentioned by Ellen last week, there were only ever 13 women to win the Nobel Prize in Physiology or Medicine. But in 1962, it was erroneously bestowed upon three men for the scientific breakthrough of a woman. This blog post would just as well fit into a true crime in science series.

All down to misogyny and a single piece of evidence: Photograph 51, an X-ray crystallography of the structure of DNA viewed perpendicular to the DNA fibre axis, revealing the double helix structure.

You will likely all remember James Watson and Francis Crick from biology classes in school. You were probably taught that they figured out the structure of DNA.

But at the same time, they worked together in Cambridge, Franklin was working together with her PhD student Raymond Gosling at Kings College in London. Forced to work alongside Maurice Wilkins, who did not take well to her confident, goal-oriented ways, which led her to criticise her well-respected peers and dared to interrupt and correct them.

Leading to her downfall in the race with Watson and Crick was that Franklin complied with her understanding of scientific ethics, and rather than rushing to publish her findings, she sought to verify them and replicate the findings in Photograph 51.

Betrayed by her colleague Wilkins after ample tensions over the years. He passes her priceless finding to the competition, allowing Watson and Crick to model the double helix, publish a breakthrough paper and relegate her to a methods paper in the same issue of the nature journal.

Tragically, her young death at 37 from ovarian cancer prevented her from witnessing the Nobel Prize being awarded for discoveries in the molecular structure of DNA four years later. Which in 1962 was not to be awarded posthumously. Instead, her reputation for years was dominated by the more than unflattering recollections in James Watson’s biography. The book clued the public into the crimes the three men committed. All the while tarnishing Franklin’s name, portraying wildly misogynistic images and downplaying her indisputable contribution to science. Only after society as a whole changed its views on women and misogyny did perceptions of Rosalind Franklin and James Watson finally get corrected.

Today, Rosalind Franklin’s legacy stands as a symbol of tenacity, intellect, and an unyielding spirit that will inspire generations to come. It is about time that science books get rewritten to remind us that those are the virtues we should hold in high regard. Rather than the yearning for glory and a legacy that we see in the pressure to publish, the chase of impact factors never intended to rank journals and scientists but as a tool for librarians and the impossible climb through academia, forcing impossible expectations on principal investigators to take on endless students and responsibilities. Let’s take this opportunity to refocus and make sure it’s the pursuit of knowledge and answering questions that drive science forward that determine our decisions.

Written by Ronja Struck

Women in Science: Madame Curie

Women have made significant contributions to the field of science throughout history, but they have often faced gender-based barriers and discrimination. Despite the challenges, several pioneering women made significant contributions to various scientific fields. Marie Curie, for example, conducted ground-breaking research in radioactivity and was the first person (and remains the only woman) to win Nobel Prizes in two different scientific disciplines (physics and chemistry). In 1903, she received the Nobel Prize in Physics along with Pierre Curie and Henri Becquerel for their work on radioactivity. Later, in 1911, she received the Nobel Prize in Chemistry for her contributions to the understanding of radium and polonium. These discoveries had a profound impact on the understanding of atomic and nuclear physics and laid the foundation for numerous scientific and medical advancements. They led the development of X-ray machines for medical diagnosis and the development of cancer treatment through radiation therapy (NobelPrize.org, 2023).

As a woman in the 20th Century, Madame Curie too faced early struggles with financial and gender-related challenges in her pursuit of education. She had to work hard as a governess and in other low-paying jobs to support her sister’s education before she could attend University. Her struggles continued into her research, where she first published her early scientific work under the pseudonym “Pierre Curie” to avoid gender bias and prejudice. This allowed her to have her work taken more seriously. However, despite her struggles to receive an education, in 1906, Marie Curie herself became the first Female Professor at the University of Paris (MarieCurie.org, 2023)

Marie Curie not alone made epic contributions to science, she was also involved in war efforts. During World War I, Marie Curie developed mobile radiography units, or “Little Curies,” to provide X-ray services to wounded soldiers. She and her daughter, Irène, operated these units on the front lines. She also served as the director of the Red Cross Radiology Service and trained nurses and doctors in radiography (Davis, 2016).

MLA style: Marie Curie – Photo gallery. NobelPrize.org. Nobel Prize Outreach AB 2023. Thu. 26 Oct 2023.

Madame Curie passed away on July 4, 1934, in Sallanches, France, but her legacy in the world of science endures. Marie Curie’s personal cookbook and other belongings are still radioactive and are stored in lead-lined boxes at the National Library in Paris. They will remain radioactive for thousands of years. The Musée Curie (Curie Museum) is a museum located in Marie Curie’s former laboratory at the Institut du Radium in Paris. It showcases her personal artefacts, laboratory equipment, and documents related to her research on radioactivity. If you are holidaying in Paris, you can take an hour and explore the laboratory space and learn about the scientific achievements of Marie Curie and her husband, Pierre Curie. For me, Marie Curie’s dedication to research, numerous contributions to the field of radioactivity, and her status as a trailblazing woman in science is inspiring. I hope her legacy will continue to inspire generations of scientists and serve as a testament to the power of scientific curiosity and perseverance.

Fun fact: Radium became a popular element in various consumer products during the early 20th century. It was added to items like toothpaste, face creams, and even drinks, all of which claimed to provide health benefits. Marie Curie herself endorsed some of these products before the health risks of radiation exposure were well understood (Santos, 2021).

Written by Ciara Gallagher

Reading:

DAVIS, A. 2016. How Marie Curie Helped Save a Million Soldiers During World War I The radiology pioneer developed and operated mobile X-ray units to treat the injured. Available: https://spectrum.ieee.org/how-marie-curie-helped-save-a-million-soldiers-during-world-war-i [Accessed 2023].

MARIECURIE.ORG. 2023. Marie Curie the scientist [Online]. Available: https://www.mariecurie.org.uk/who/our-history/marie-curie-the-scientist#:~:text=Born%20Maria%20Sk%C5%82odowska,She%20never%20lost%20this%20passion. [Accessed].

NOBELPRIZE.ORG. 2023. Marie Curie [Online].  [Accessed 24/10/23 2023].

SANTOS, L. J. 2021. “A Revolutionary Beauty Secret!” On the Rise and Fall of Radium in the Beauty Industry. LitHub.