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Lemon frost gecko.
Photo Credit: Dr. Tony Gamble, Marquette University.
Scientific Frontline: Extended "At a Glance" Summary: The Lemon Frost Gecko Cancer Model
The Core Concept: The "lemon frost" morph of the leopard gecko is a uniquely tumor-prone reptile that develops aggressive, metastasizing cancers naturally and early in life.
Key Distinction/Mechanism: Unlike traditional laboratory models like mice, which typically require cancer to be artificially induced, the lemon frost gecko develops tumors naturally due to a spontaneous genetic mutation. Genomic alterations in these tumors affect many of the same genes and biological processes involved in human cancers.
Origin/History: This distinct color variety originated from a spontaneous genetic mutation during selective breeding in the pet trade, after which breeders noted that 80% of these geckos developed aggressive tumors. The genetic analysis of this trait was published in BMC Biology by an international research team led by the University of Nottingham.
Major Frameworks/Components:
- Whole-Genome Sequencing: Comparing tumor tissue with healthy tissue from the same individuals to identify repeated genomic alterations.
- Comparative Oncology: Examining evolutionary strategies for cancer susceptibility versus resistance (e.g., comparing highly susceptible geckos to highly resistant turtles).
- Bioinformatics Adaptation: Utilizing and adapting genomic software programs originally developed for analyzing human cancers to process data from diverse biological organisms.
Branch of Science: Oncology, Genomics, Evolutionary Biology, Genetics, and Zoology.
Future Application: Genetic insights from natural tumor development in these geckos could inspire new strategies for preventing, detecting, and treating cancer in humans by expanding the variety of animal models utilized in medical research.
Why It Matters: Studying a species with a naturally high vulnerability to cancer helps scientists map the fundamental biology of the disease across the evolutionary tree, underscoring the direct medical value of global biodiversity.
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| Lemon frost gecko with several tumors on the head. Photo Credit: Robert Ossiboff, University of Florida. |
A new study led by experts at the University of Nottingham suggests a pet gecko with an unusually high risk of tumors may be a promising model for understanding how cancer develops and spreads.
The findings of the study, published in BMC Biology, could help explain why some animals frequently get cancer and others rarely do.
While some reptiles, such as turtles and tortoises, rarely develop cancer, one color variety of the leopard gecko, known in the pet trade as the "lemon frost" morph, develops aggressive tumors in 80 percent of individuals. This new research has identified genomic changes associated with this cancer, some affecting the same genes and biological processes involved in human cancers.
"By studying why some animals are so susceptible to cancer while others are remarkably resistant, we hope to uncover the different ways species have evolved to deal with cancer. Specifically, this gecko could become an incredible model in cancer research because tumors appear naturally at a relatively early age. Together, these natural strategies could inspire new ways of preventing, detecting, and treating cancer in humans."
The lemon frost gecko is a striking white-and-yellow color variety that arose from a spontaneous genetic mutation during selective breeding in a large colony of leopard geckos. Soon after it appeared in the pet trade, breeders noticed that many of these geckos developed aggressive tumors that often spread throughout the body.
Unlike traditional laboratory models for cancer research, such as mice, which typically require tumors to be induced, lemon frost geckos develop tumors—which often metastasize—naturally and relatively early in life. This gives scientists a rare opportunity to investigate how cancer arises, evolves, and spreads in an animal that develops the disease naturally.
Using whole-genome sequencing, the researchers compared tumor tissue with healthy tissue from the same geckos. They discovered a series of genomic changes that repeatedly occurred in the tumors. Many of the affected genes and biological processes are known to play important roles in cancer in other organisms, including humans, suggesting that lemon frost geckos could provide insights that reach far beyond reptiles.
The study also highlights the importance of expanding the range of animal models used in medical research, showing how species that naturally develop cancers at high rates, such as the lemon frost gecko, can complement traditional laboratory models.
Brandon Hastings, one of the authors of the paper, said, “Overall, our paper demonstrates the importance of looking across the tree of life in search of answers that are needed to better understand diseases that can have a profound impact on human life, such as cancer. Methodologically, it also highlights that the variety of genomic software programs developed to analyze human cancers can be adapted to provide meaningful insights in diverse organisms.”
Dr. Scott Glaberman from the University of Birmingham, who was also involved in the study, said, “We often look inward to solve human problems, but every species has something to teach us. By studying both animals that are vulnerable to cancer and those that resist it, we have far greater power to understand the disease itself. This is one of the many reasons why protecting biodiversity is so important.”
Additional information: The study was led by Dr. Ylenia Chiari from the School of Life Sciences at the University of Nottingham.
Published in journal: BMC Biology
Title: Dissecting cancer in a non-mammalian model: genomic insights from lemon frost geckos
Authors: Brandon T. Hastings, Tony Gamble, Robert J. Ossiboff, Virginia Gazziero, Giulio Caravagna, Scott Glaberman, and Ylenia Chiari
Source/Credit: University of Nottingham | Charlotte Wall
Edited by: Scientific Frontline
Reference Number: ongy071526_01
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