Category: Chemistry, Biochemistry and Pharmacology

Haley Bridgewater: Taking the Sting Out of Vaccines

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Haley Bridgewater, a graduate student at Boise State University in Idaho, is sure she wants to continue studying infectious diseases after she graduates with her Ph.D., but she’s finding it difficult to choose a specific topic within that branch of biomedical science. “My problem is that I like them all. The more I look into specific research topics to narrow down my options, the longer my list of potential topics grows,” she says.

A portrait image of Haley Bridgewater standing on a bridge over a river.
Haley Bridgewater in front of the Boise River on Boise State University campus. Credit: Elise Overgaard, Ph.D., Boise State University.

Haley’s early introduction to science wasn’t related to the biological sciences at all. She grew up in Los Alamos, New Mexico, where her dad studied nuclear chemistry. Discussions about chemistry, physics, and rockets surrounded her, and she would often stare up at the night sky to catch a glimpse of a meteor shower or the International Space Station passing by. But she was even more curious about what was below her feet: What makes an insect different from a rock? What does the microscopic world look like? She received a microscope one year for her birthday and carried it with her everywhere so she could try to answer these questions.

Global Experiences

Haley took an advanced biology class in high school, where she learned not only about the living world, but also the many exciting scientific careers available, such as becoming a researcher. She moved to Tacoma, Washington, and earned a bachelor’s degree from Pacific Lutheran University (PLU), where she majored in biology and global religion.

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Investigating the Inner Workings of Ion Channels With Sudha Chakrapani

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A headshot of Dr. Chakrapani.
Credit: Courtesy of Dr. Sudha Chakrapani.

“Curiosity was a central theme in my learning process,” says Sudha Chakrapani, Ph.D., a professor and chair of the department of pharmacology at Case Western Reserve University in Cleveland, Ohio. As a high schooler in India, she especially enjoyed her science classes because they fostered her curiosity and allowed her to ask more questions than other subjects did. She was curious about how to use science to solve the challenges she and her community faced, like access to safe drinking water. Seawater surrounded them, so could they find a way to convert it into drinking water?

As part of India’s annual National Teachers’ Day celebration, high school seniors take on the role of educators and teach their younger peers for the day. Dr. Chakrapani loved the experience, and it solidified what she already knew: She wanted to go to college to be a science teacher. After earning her bachelor’s degree, she entered back-to-back master’s programs in biochemistry and biomedical engineering, where she had the opportunity to do hands-on research.

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Chemistry by the Numbers

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Numbers are everywhere in chemistry. You can’t balance equations, determine limiting reactants, or calculate percent yields without them. So, let’s dive into some of the significant figures in chemistry!

3

An atom shown as three red and four blue spheres clustered in the center, with three gray spheres each on a gray orbit encircling the cluster.
A lithium atom with three protons (red) and four neutrons (blue) in the nucleus and three gray electrons orbiting around them. Credit: iStock.

That’s the number of different types of particles—protons, neutrons, and electrons—that make up atoms, the basic unit of all matter. Protons are positively charged, neutrons are neutral, and electrons are negatively charged. The number of protons in an atom determines what element it is, and atoms usually have an equal number of protons and electrons. Atoms can have different numbers of neutrons, though, and atoms with the same number of protons and different numbers of neutrons are called isotopes. Protons and neutrons make up the core—or nucleus—of an atom, and electrons orbit around them.

4.9 Million

That’s how many miles per hour the electron in one hydrogen atom in a molecule of water is moving. At that rate, the electron could make it from New York City to Los Angeles in about 2 seconds!

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What Is CRISPR?

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It might sound like a science fiction author made up genetic engineering, but it’s a real tool researchers use in the laboratory! A gene is a segment of DNA that codes for a protein. The information within a gene directs the building of a protein, block by block, through the process of gene expression. For a variety of reasons, including learning about certain cellular processes, scientists use genetic engineering in the lab to manipulate a cell’s genes and the proteins they encode.

Bacteria, shaped as a cluster of orange spheres with bumpy surfaces, on top of an uneven surface.
Streptococcus bacteria under the microscope. Species in this genus, such as Streptococcus pyogenes, have a CRISPR-based defense system. Credit: NIAID/NIH.

One of the most commonly used genetic engineering techniques is called clustered regularly interspaced short palindromic repeats (CRISPR), named for the odd, repeating sequences that researchers found in bacterial DNA in 1987.

Eventually, researchers discovered that these sequences are part of a bacterial immune system. (Just like humans, bacteria are susceptible to viral infections!) Some bacteria are able to insert short sequences of DNA from viruses that previously infected them into their own genome, allowing them to “remember” and more quickly recognize that virus in the future. If the invader tries to attack again, the bacterium recognizes and kills it by chopping up the part of its DNA that matches the “memory” using a special type of protein, an enzyme called CRISPR-Associated (Cas) protein. Our own immune systems also have the ability to remember pathogens through our adaptive immune response.

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Inventing New Ways to Build Bonds: Q&A With Elias Picazo

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 A portrait image of Dr. Elias Picazo.
Credit: Courtesy of Dr. Elias Picazo.

“Science has always impacted me, but I didn’t realize how much until I actually became a scientist,” says Elias Picazo, Ph.D., assistant professor of chemistry at the University of Southern California in Los Angeles. We talked to Dr. Picazo about his path to becoming a scientist, some of the challenges he faced along the way, and his research inventing new ways to make chemical bonds.

Get to Know Dr. Picazo

  • Books or movies? Movies
  • Beach or mountains? Mountains
  • Favorite music genre? Pop
  • Rainy or sunny? Sunny
  • Salty or sweet? Sweet
  • Music or podcast? Podcast
  • Washing glassware in the lab or dishes in your kitchen? Glassware
  • Favorite lab tool? Magnetic stirrer
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What Is a Neurotransmitter?

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Have you wondered what controls the most basic functions of our bodies, like breathing, moving, and sleeping? Chemicals called neurotransmitters play a central role. Neurotransmitters pass messages from one nerve cell to another, and sometimes to muscles or glands. These messages may:

  • Prompt the next nerve cell to pass on the message, prevent the message from going any further, or adjust how the message is passed on
  • Cause a muscle to contract, like our intestines do when they digest food
  • Tell a gland to secrete hormones, which are molecules that further pass on messages to tissues or organs

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Trainee Colton Pelletier Builds a Rotifer-Studying Robot

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Colton Pelletier posing in front of complex laboratory machinery and a computer screen.
Colton Pelletier with Roti-Bot. Credit: Grace Boland, RWU.

During his time at Roger Williams University (RWU) in Bristol, Rhode Island, Colton Pelletier built a robot that will help simplify data collection for research projects in the lab he worked in—and others—for years to come. Aiding in Colton’s success in the lab was NIGMS funding through the Institutional Development Award (IDeA) Networks of Biomedical Research Excellence (INBRE) program. INBRE funds statewide networks of higher education in IDeA states such as Rhode Island, which have historically received low levels of NIH funding. The program supports faculty research, mentoring, student participation in research, and research infrastructure by connecting primarily undergraduate institutions with research-intensive universities in the state.

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Where the Sugars and the Proteins Play: Q&A With Mia Huang

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A headshot of Dr. Huang.
Credit: Scripps Research Institute.

“I think there’s a very creative side to science, in figuring out how to approach a problem, which I find really engaging,” says Mia Huang, Ph.D., an associate professor of chemistry at the Scripps Research Institute in La Jolla, California. In an interview, Dr. Huang discussed her shift in interest from medicine to science, her graduate school work on nature-inspired antifreeze molecules, and her lab’s exploration of the roles of sugar-coated proteins in our bodies.

Get to Know Dr. Huang

  • Coffee or tea? Coffee
  • Favorite music genre? EDM
  • Cats or dogs? Dogs—I’m a proud mom to a 15-pound Bernedoodle
  • Rainy or sunny? Sunny
  • What was your childhood dream job? Scientist—I’m living the dream!
  • Favorite hobby? Playing video games
  • Favorite piece of lab safety equipment? Safety goggles
  • A scientist (past or present) you’d like to meet? Gilbert Ashwell and Anatol Morell (accidentally co-discovered the asialoglycoprotein receptor)

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What Is a Hormone?

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Hormones are chemical messengers in the body that glands form and release, or secrete, into the bloodstream, where they travel to various organs and tissues to change biological functions. Hormone levels fluctuate during a lifespan and even on a daily basis.

Growth spurts in toddlers or sudden changes in adolescents are directly related to large hormonal shifts during development and puberty. Smaller changes occur throughout each day to help maintain normal bodily functions, such as our sleep-wake cycle known as our circadian rhythm.

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Exploring Ribosome Assembly and RNA Modification: Q&A With Eda Koculi

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Dr. Eda Koculi standing in a lab with an old chemistry textbook lying open on the bench behind her.
Dr. Koculi standing in her lab next to her childhood chemistry book that changed her life. Credit: Luis Miranda, UTEP Media.

“Being a scientist is thrilling, and it’s also tremendously fun,” says Eda Koculi, Ph.D., assistant professor of chemistry and biochemistry at the University of Texas at El Paso (UTEP). “In my opinion, science is the only profession that allows a person to simultaneously express their creativity, quench their intellectual curiosity, and serve society.” We spoke with Dr. Koculi about how she became a researcher, what she’s uncovering about how ribosomes are built and modified, and how she encourages students to pursue scientific careers.

Get to Know Dr. Koculi

  • Coffee or tea? Coffee
  • Favorite music genre? Classical
  • Salty or sweet? Salty
  • Early bird or night owl? Night owl
  • Washing glassware in the lab or dishes in your kitchen? Glassware
  • What was your childhood dream job? A scientist or a teacher—and I have both my dream jobs.
  • Favorite hobby? Hiking
  • Favorite piece of lab safety equipment? Geiger counter
  • Favorite molecule? RNA
  • A scientist (past or present) you’d like to meet? Marie Curie

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