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Sanghani Center research takes new approach to analyze depression, anxiety from Reddit posts to provide better care, lower suicide rate

Suicide, the 10th leading cause of death for adults in the United States and the third leading cause of death among kids ages 10 to 14 and young adults…

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Suicide, the 10th leading cause of death for adults in the United States and the third leading cause of death among kids ages 10 to 14 and young adults ages 15 to 24, is often the result of an underlying mental health condition such as depression, anxiety, or bipolar disorder. 

Credit: Photo by Joung Min Choi for Virginia Tech.

Suicide, the 10th leading cause of death for adults in the United States and the third leading cause of death among kids ages 10 to 14 and young adults ages 15 to 24, is often the result of an underlying mental health condition such as depression, anxiety, or bipolar disorder. 

Motivated by a suicide mortality by state map released by the Centers for Disease Control and Prevention (CDC) on the increasing severity of mental health crisis — further exacerbated by the COVID-19 pandemic — three Ph.D. students and their advisor at the Sanghani Center for Artificial Intelligence and Data Analytics are analyzing social media in a way that can help social workers and other professionals better understand and tackle different aspects of mental health issues to help prevent suicide.

“Since social media platforms like Reddit are accessible, convenient, and anonymous, more users candidly express feelings about their own mental health issues,” said Shailik Sarkar, first author on “Predicting Depression and Anxiety on Reddit: a Multi-task Learning Approach.” Sarkar and his team garnered the Best Paper Award at the IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining in November.

Sarkar’s collaborators are fellow students Abdulaziz Alhamadani and Lulwah AlKulaib, and Chang-Tien Lu, professor of computer science and associate director of the Sanghani Center.

Typically, research on the Reddit platform would employ the subreddit name, such as r/Anxiety, r/Depression, or r/SuicideWatch, to detect the type of the post and the nature of the mental health issues that correlate to the post. 

But the multi-label classification data set designed by the Virginia Tech researchers does not overly rely on the subreddit topic chosen by the user because someone posting in the r/Anxiety subreddit could also be suffering from other mental health conditions such as depression, sleep disorder, or post-traumatic stress disorder.

Their unique model has a task-specific feature that extracts the words and phrases used in a post and assigns them a score corresponding to each topic that applies. For example, words and phrases such as “meds,” “panic attacks,” “often,” “taking,” and “worrying” could suggest anxiety, while “struggling,” “therapist,” “don’t want,” “need,” and “anymore” could indicate depression. 

“Reddit posts can be longer than other social media posts, especially when pertaining to mental health discussion, so there is a very good chance that the same post will fall into different categories,” said Sarkar. “Insights into the kind of language used by those suffering from anxiety, depression, and other mental illnesses can be of great benefit to social workers and mental health practitioners. A better understanding of those under their care may help prevent incidents of suicide.”

“Our research with Reddit — which always adheres to privacy and anonymity of users —  demonstrates how the lack of unlabeled data or benchmark data set can be tackled by using active learning and can help inform other data scientists who are interested in human-centered computing or social media data mining,” said Lu.


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Central Illinois named US Tech Hub for biomanufacturing by Biden-Harris administration

URBANA, Ill. — President Joe Biden announced Monday that the Illinois Fermentation and Agriculture Biomanufacturing Hub (iFAB) is among 31 designated…

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URBANA, Ill. — President Joe Biden announced Monday that the Illinois Fermentation and Agriculture Biomanufacturing Hub (iFAB) is among 31 designated Regional Innovation and Technology Hubs (Tech Hubs) by the U.S. Economic Development Administration (EDA) — recognizing Central Illinois as a globally competitive center for innovation and job creation in biomanufacturing.

Credit: Anna Longworth Photography

URBANA, Ill. — President Joe Biden announced Monday that the Illinois Fermentation and Agriculture Biomanufacturing Hub (iFAB) is among 31 designated Regional Innovation and Technology Hubs (Tech Hubs) by the U.S. Economic Development Administration (EDA) — recognizing Central Illinois as a globally competitive center for innovation and job creation in biomanufacturing.

Led by the Integrated Bioprocessing Research Laboratory (IBRL) at the University of Illinois Urbana-Champaign, the iFAB consortium includes 30 partner organizations representing academic, industry, government, and nonprofit partners committed to catalyzing industry growth in Champaign, Piatt, and Macon counties. 

“The iFAB designation leverages IBRL’s five years of operational success. Companies come here to prove their technologies, and our aim is for them to remain in the region and establish early manufacturing facilities to progress from ideation to commercialization,” said iFAB principal investigator Beth Conerty, the Associate Director of Business Development at IBRL, part of the College of Agricultural, Consumer and Environmental Sciences and The Grainger College of Engineering

The EDA Tech Hubs program was authorized by the bipartisan CHIPS and Science Act of 2022 with the goal to boost economic growth, spur job creation, and ensure U.S. national security. 

The precision fermentation industry is projected to reach $11.8 billion by 2028, with the potential to generate one million jobs by 2030. The EDA’s Tech Hub designation elevates the reputation and confidence needed to attract more funding, resources, companies, and talent in this space to Central Illinois. 

Precision fermentation is a growing area of biomanufacturing that can turn local feedstocks, mainly corn and soybeans, into a variety of goods — including textiles, biofuels, food ingredients, polymers, pigments, and more domestically. This sustainable, scalable, and biological manufacturing process relies on microbes to convert sugars into high-value products.

“Our position as a regional leader in precision fermentation is solidified by this designation,” said iFAB partner Nicole Bateman, president of the Economic Development Corporation of Decatur & Macon County. “Receiving federal recognition unlocks opportunities for infrastructure development and business investment and attraction, which results in job creation. We have been partnering across the corridor informally for several years, and the momentum in the region will be enhanced by this formal designation.”  

As a designated Tech Hub, iFAB has cleared the first phase of the Tech Hubs program and qualifies to apply for phase two funding of $45 million to $70 million. EDA anticipates that between five and 10 of the 31 Tech Hubs will receive phase two funding. 

If successful, phase two funding would support several iFAB initiatives to expand the Central Illinois precision fermentation industry:  

  • Support capital projects to create more multi-use facilities and infrastructure to support growth-stage bioprocessing and fermentation companies; lab space is needed to scale high-growth ventures in the region.
  • Expand workforce development training programs at Parkland College and Richland Community College in partnership with industry partners to provide relevant job skills.
  • Broaden the biomanufacturing entrepreneurial ecosystem through efforts at University of Illinois Research Park and the Illinois AgTech Accelerator to fuel startups.
  • Attract companies through the Economic Development Corporations (EDC) in Champaign County and Decatur & Macon County in partnership with the Illinois Department of Commerce and Economic Opportunity (DCEO) and Intersect Illinois. 

“This historic announcement is a result of our regional and statewide collaboration and will enhance business attraction to our region, expanding our ever-growing AgTech footprint,” said iFAB partner Carly McCrory-McKay, executive director of the Champaign County EDC. “We’re thrilled about this Tech Hub designation for our communities and will work with our partners to ensure that the iFAB AgTech Corridor—made up of Champaign, Macon, and Piatt counties—becomes the global leader and innovation center in biomanufacturing. This is a game changer for innovation and economic growth, and we’re proud to say that iFAB is a Tech Hub.”

iFAB’s Tech Hub designation is a return on investment by the State of Illinois. “IBRL was a strategic experiment that has shown proof of concept,” Conerty said. “We have been overwhelmed by the response for equipment, infrastructure, and expertise. We are now bursting at the seams with a waitlist for equipment and processes. With more support, we could be doing so much more.” 

The consortium’s industry partners include ADM and Boston Bioprocess, who both have operations at Research Park, as well as Primient and Clarkson Grain Company

iFAB is one of two designated Tech Hubs in Illinois; the second is the Chicago-based The Bloch Tech Hub that focuses on quantum technologies. Both coalitions are part of Innovate Illinois, a strategic initiative led by Governor JB Pritzker to establish Tech Hubs in the state. 

“As one of America’s leading research universities, the University of Illinois Urbana-Champaign solves problems and helps to power our nation’s economy,” said U. of I. Chancellor Robert E. Jones. “These TechHub designations in Illinois unite our strengths with our academic, industrial, community, and government partners to imagine a bright future for communities across the region.” 


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Bacteria can enhance host insect’s fertility with implications for disease control

Mosquitoes and other insects can carry human diseases such as dengue and Zika virus, but when those insects are infected with certain strains of the bacteria…

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Mosquitoes and other insects can carry human diseases such as dengue and Zika virus, but when those insects are infected with certain strains of the bacteria Wolbachia, this bacteria reduces levels of disease in their hosts. Humans currently take advantage of this to control harmful virus populations across the world.

Credit: Shelbi Russell, UC Santa Cruz.

Mosquitoes and other insects can carry human diseases such as dengue and Zika virus, but when those insects are infected with certain strains of the bacteria Wolbachia, this bacteria reduces levels of disease in their hosts. Humans currently take advantage of this to control harmful virus populations across the world.

New research led at UC Santa Cruz reveals how the bacteria strain Wolbachia pipientis also enhances the fertility of the insects it infects, an insight that could help scientists increase the populations of mosquitoes that do not carry human disease.

“With insect population replacement approaches, they keep all the mosquitos and just add Wolbachia so that fewer viruses are carried in those mosquitoes and transmitted to humans when they bite them — and it’s working really, really well,” said Shelbi Russell, an assistant professor of biomolecular engineering at UCSC who led this research. “If there is some fertility benefit of Wolbachia that could evolve over time, then we could use that to select for higher rates of mosquitos that suppress our viral transmission.”

These results were detailed in a new paper led by Russell, published today in the journal PLOS Biology. UCSC Professor of Molecular, Cell, and Developmental Biology William Sullivan is the paper’s senior author.

Humans and Wolbachia 

Different strains of Wolbachia bacteria naturally infect a number of different animals worldwide, such as mosquitos, butterflies, and fruit flies. Once they infect an insect, the bacteria are able to manipulate the reproduction and development of their host to increase their own population. Humans take advantage of this to control the population size of insects that carry diseases that threaten us. 

Wolbachia have developed a mechanism to poison the sperm of infected males so that if the male mates with an uninfected female, most of the potential offspring die at the very first cell division, and the rest are lost soon after. Humans have taken advantage of this to kill off insect populations. 

However, research shows that later down the line once they have killed off as many uninfected hosts as possible, Wolbachia switch their evolutionary strategy to increase population levels of infected hosts. Understanding how this happens is important for avoiding unexpected consequences of human efforts to control insect populations. 

“We need to understand all of these factors and their evolutionary potential if we’re going to be releasing bacteria into new ecosystems,” Russell said. “They’re evolving in real time, so we need to understand where these trajectories are going.”

Beyond disease prevention, controlling insect populations and range via bacteria could be an effective mechanism for crop security in the face of the changing climate.  

Understanding increased fertility

The new results show that Wolbachia pipientis, which is native to fruit flies, has evolved to increase the fertility, and therefore the population size, of its fruit fly host. Previous research has found that the Wolbachia pipientis achieves this by manipulating a protein in fruit flies called Meiotic-P26 that affects fertility, but how exactly this happens was unclear.

To investigate, Russell and her colleagues bred fruit flies with various defects affecting Mei-P26, which caused them to have reduced fertility. These defects occasionally occur naturally in the wild, but are hard to track in that setting. The researchers then examined what happened when they infected the flies with Wolbachia pipientis.

They found that Wolbachia infection restored the fruit fly’s fertility, enabling them to produce even more offspring than uninfected flies. The researchers found that Wolbachia can essentially undo gene defects in their host that would otherwise cause the population to go extinct. The Wolbachia rescue their host population through several strategies, including restoring fruit fly stem cells and ensuring that egg cells properly develop.

In further experiments, the researchers also found that, beyond rescuing fruit flies with defects, the Wolbachia pipientis infection also enhances the health and fertility of fruit flies without defects, resulting in higher egg lay and hatch rates for those insects. 

Wolbachia in the lab

Russell focuses on Wolbachia because it and its fruit fly hosts are relatively easy to keep alive and reproduce in the lab. Oftentimes when scientists study bacteria, their efforts are hindered because either the host, the bacteria, or both are difficult to keep alive in the lab setting — even research into common bacteria important to humans such as Chlamydia are slowed by this problem. Wolbachia and their fruit fly hosts offer a rare opportunity to understand how bacteria can change the DNA and biological processes of their host.

“Through studying this system, I can learn a lot about how these weird bacteria work and how they integrate with host biology,” Russell said. “Bacteria are able to hop into these eukaryotes and leverage some of those mechanisms that their ancestors didn’t even contain the genes for. It’s a really fascinating thing in general, and it’s cool that we can leverage this for biological control applications.”

Russell and her lab will continue to hone in on the specific changes that occur in the genomes and gene expression of host species, and look at the fertility benefits that Wolbachia may bring to their hosts in other insect populations.

Russell led this research primarily during her time as a postdoctoral scholar in Sullivan’s lab, where she was supported by the UC Santa Cruz Chancellor’s Postdoctoral Fellowship and funding from the National Institutes of Health. 


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Raining cats and dogs: research finds global precipitation patterns a driver for animal diversity

Since the HMS Beagle arrived in the Galapagos with Charles Darwin to meet a fateful family of finches, ecologists have struggled to understand a particularly…

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Since the HMS Beagle arrived in the Galapagos with Charles Darwin to meet a fateful family of finches, ecologists have struggled to understand a particularly perplexing question: Why is there a ridiculous abundance of species some places on earth and a scarcity in others? What factors, exactly, drive animal diversity?

Credit: Wikimedia

Since the HMS Beagle arrived in the Galapagos with Charles Darwin to meet a fateful family of finches, ecologists have struggled to understand a particularly perplexing question: Why is there a ridiculous abundance of species some places on earth and a scarcity in others? What factors, exactly, drive animal diversity?

With access to a mammoth set of global-scale climate data and a novel strategy, a team from the Department of Watershed Sciences in Quinney College of Natural Resources and the Ecology Center identified several factors to help answer this fundamental ecological question. They discovered that what an animal eats (and how that interacts with climate) shapes Earth’s diversity.

The work was recently published in the high-impact journal Ecology Letters.

“Historically studies looking at the distribution of species across Earth’s latitudinal gradient have overlooked the role of trophic ecology — how what animals eat impacts where they are found,” said Trisha Atwood, author on the study from the Department of Watershed Sciences and the Ecology Center. “This new work shows that predators, omnivores and herbivores are not randomly scattered across the globe. There are patterns to where we find these groups of animals.”

Certain locations have an unexpected abundance of meat-eating predators — parts of Africa, Europe and Greenland. Herbivores are common in cooler areas, and omnivores tend to be more dominant in warm places. Two key factors emerged as crucial in shaping these patterns: precipitation and plant growth.

Precipitation patterns across time play a big role in determining where different groups of mammals thrive, Atwood said. Geographical areas where precipitation varies by season, without being too extreme, had the highest levels of mammal diversity.

“Keep in mind that we aren’t talking about the total amount of rain,” said Jaron Adkins, lead author on the research. “If you imagine ecosystems around the world on a scale of precipitation and season, certain places in Utah and the Amazon rainforest fall on one end with low variability — they have steady levels of precipitation throughout the year. Other regions, like southern California, have really high variability, getting about 75 percent of the annual precipitation between December and March.”

But the sweet spot for predators and herbivores fell in a middle zone between the two extremes, he said. Places like Madagascar, where precipitation patterns had an equal split between a wet season and a dry one (six months each), had the ideal ecological cocktail for promoting conditions for these two groups. Omnivore diversity tends to thrive in places with very stable climates.

The second important factor connected with mammal diversity the work uncovered was a measure of the amount of plant growth in an area, measured as “gross primary productivity.”

“It makes intuitive sense for plant-eating animals to benefit from plant growth,” Adkins said.

But this measure actually impacted carnivores most, according to the research. The strong relationship between predators and plant growth highlights the importance of an abundance of plants on an entire food chain’s structural integrity.

“It was surprising that this factor was more important for predators than omnivores and herbivores,” Atwood said. “Why this is remains a mystery.”

Although evolutionary processes are ultimately responsible for spurring differences in species, climate conditions can impact related factors — rates of evolutionary change, extinction and animal dispersal — influencing species and trait-based richness, according to the research.

Animal diversity is rapidly declining in many ecosystems around the world through habitat loss and climate change. This has negative consequences for ecosystems. Forecasting how climate change will disrupt animal systems going forward is extremely important, Atwood said, and this research is a first step in better managing future conditions for animals around the world.

“Animal diversity can act as an alarm system for the stability of ecosystems,” Atwood said. “Identifying the ecological mechanisms that help drive richness patterns provides insight for better managing and predicting how diversity could change under future climates.”

In addition to Adkins and Atwood, the research included seven authors currently or previously associated with the Department of Watershed Sciences and the Ecology Center: Edd Hammill, Umarfarooq Abdulwahab, John Draper, Marshall Wolf, Catherine McClure, Adrián González Ortiz and Emily Chavez.

 


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