Nicole Gaudelli studies how to use a powerful gene-editing tool called CRISPR to modify genes that control cholesterol levels in the body. High cholesterol is a significant risk factor for heart disease, a leading cause of death. By targeting and disabling the PCSK9 gene, which normally increases cholesterol levels, her research aims to create treatments that could maintain low cholesterol levels with just a single injection, rather than lifelong medication.
Key findings
A single CRISPR injection reduced cholesterol levels in monkeys by approximately 60%.
The effect of the treatment lasted for at least 8 months without any additional interventions.
This approach highlights a potential for one-time gene therapies to replace the need for long-term cholesterol medications.
Frequently asked questions
Does Dr. Gaudelli study cholesterol-related conditions?
Yes, she focuses on gene editing related to cholesterol management and heart disease.
What treatments has Dr. Gaudelli researched?
She has researched a gene-editing method using CRISPR to lower cholesterol levels effectively.
Is Dr. Gaudelli's work relevant to patients with heart disease?
Absolutely, her research aims to develop lasting treatments for high cholesterol, which can significantly benefit heart disease patients.
Publications in plain English
Improved cytosine base editors generated from TadA variants.
2023
Nature biotechnology
Lam DK, Feliciano PR, Arif A, Bohnuud T, Fernandez TP +11 more
Plain English This study looked at a new type of gene editor called cytosine base editors (CBEs) that can change specific DNA sequences without causing random alterations throughout the genome. The researchers created improved versions of these editors using a modified enzyme called TadA, which led to better performance and reduced unwanted changes in the DNA. Their new editors successfully made targeted changes in various cell types without increasing the overall mutation rate in the DNA.
Who this helps: This benefits patients with genetic disorders, as it offers a safer and more efficient way to correct harmful mutations.
Plain English This study looks at improving a tool called Cas9, which is used for editing genes in living cells. Researchers have made various upgrades to Cas9 to make it better at making precise changes in the genetic code. These improvements aim to enhance how well the tool works, which is crucial for developing new treatments and therapies.
Who this helps: This benefits researchers and doctors working to develop gene therapies for patients with genetic disorders.
CRISPR-derived genome editing therapies: Progress from bench to bedside.
2021
Molecular therapy : the journal of the American Society of Gene Therapy
Rees HA, Minella AC, Burnett CA, Komor AC, Gaudelli NM
Plain English This research paper talks about how CRISPR technology is being developed for medical treatments that can change DNA in human cells. It explains how CRISPR works, the challenges it faces—such as the risk of making unwanted changes to the DNA—and the obstacles to getting these therapies approved for use in patients. Overall, the progress made in CRISPR could lead to new and effective treatments for various genetic conditions.
Who this helps: This helps patients with genetic disorders seeking new treatment options.
In vivo CRISPR base editing of PCSK9 durably lowers cholesterol in primates.
2021
Nature
Musunuru K, Chadwick AC, Mizoguchi T, Garcia SP, DeNizio JE +37 more
Plain English Researchers used a gene-editing tool called CRISPR to permanently disable a gene in monkeys' livers that controls cholesterol production, delivering it through tiny fat particles injected into the bloodstream. After a single injection, the monkeys' cholesterol dropped by about 60% and stayed low for at least 8 months without any additional treatment. This proves that gene editing could offer heart disease patients a one-time treatment instead of taking cholesterol drugs for life.
Directed evolution of adenine base editors with increased activity and therapeutic application.
2020
Nature biotechnology
Gaudelli NM, Lam DK, Rees HA, Solá-Esteves NM, Barrera LA +12 more
Plain English Researchers improved a tool called adenine base editors, specifically by creating a new version called ABE8. This new version showed much better performance, achieving 1.5 to 3.2 times more editing efficiency at certain DNA positions compared to the older version, ABE7.10. Notably, in human cells, ABE8 was able to make changes in DNA that resulted in up to 60% efficiency for certain genes related to fetal hemoglobin, and in immune cells, it had a success rate of 98-99% for targeted modifications without causing significant unintended effects.
Who this helps: This research benefits patients with genetic disorders, particularly those related to hemoglobin disorders and blood diseases.
Cytosine base editors with minimized unguided DNA and RNA off-target events and high on-target activity.
2020
Nature communications
Yu Y, Leete TC, Born DA, Young L, Barrera LA +4 more
Plain English This study focused on improving a tool called cytosine base editors (CBEs) that can make precise changes to DNA in the human genome. The researchers created eight new versions of CBEs that perform the desired edits with high accuracy while reducing unwanted changes in both DNA and RNA by up to 69 times compared to earlier versions. This is important because it ensures that these editing tools can be used safely and effectively in treatments for genetic diseases.
Who this helps: This benefits patients with genetic disorders who may need precise gene editing as part of their treatment.
Circularly permuted and PAM-modified Cas9 variants broaden the targeting scope of base editors.
2019
Nature biotechnology
Huang TP, Zhao KT, Miller SM, Gaudelli NM, Oakes BL +3 more
Plain English Researchers developed new versions of a tool called base editors to make it easier to target specific DNA sequences in genes. They created six improved adenine base editors that can work with more types of DNA sequences, expanding the area they can edit from about 4-5 nucleotides to around 8-9 nucleotides. This advancement is significant because it allows for more precise changes in genetic material, which can improve genetic therapies.
Who this helps: This benefits patients who may need targeted genetic therapies for various diseases.
Author Correction: Circularly permuted and PAM-modified Cas9 variants broaden the targeting scope of base editors.
2019
Nature biotechnology
Huang TP, Zhao KT, Miller SM, Gaudelli NM, Oakes BL +3 more
Plain English This paper discusses updates to research on modified Cas9 proteins, which are tools used in gene editing. The new versions can target a broader range of DNA sequences, enhancing their effectiveness. This finding is significant because it may lead to more precise treatments for genetic disorders.
Who this helps: This helps patients with genetic disorders who may benefit from improved gene editing therapies.
Structure of a bound peptide phosphonate reveals the mechanism of nocardicin bifunctional thioesterase epimerase-hydrolase half-reactions.
2019
Nature communications
Patel KD, d'Andrea FB, Gaudelli NM, Buller AR, Townsend CA +1 more
Plain English This study looked at a specific part of the nocardicin production process, focusing on a type of enzyme that modifies amino acids to protect them from being broken down. Researchers found that this enzyme can change L-amino acids into D-amino acids with a high efficiency of more than 100 times, while also releasing the final product. Understanding how this enzyme works is important because it could help in developing new medicines from natural compounds.
Who this helps: This helps patients and researchers working on new drug development.
Publisher Correction: Programmable base editing of A•T to G•C in genomic DNA without DNA cleavage.
2018
Nature
Gaudelli NM, Komor AC, Rees HA, Packer MS, Badran AH +2 more
Plain English This paper corrects an error in a previous study about a method that alters specific parts of genetic material without cutting any DNA. The correction involves the labeling of two graphical elements that mistakenly identified genetic changes. Ensuring accurate data is important for researchers working on genetic editing, as it helps in developing safe and effective therapies.
Who this helps: This helps researchers and scientists working in genetics and gene therapy.
Improved base excision repair inhibition and bacteriophage Mu Gam protein yields C:G-to-T:A base editors with higher efficiency and product purity.
2017
Science advances
Komor AC, Zhao KT, Packer MS, Gaudelli NM, Waterbury AL +4 more
Plain English This study focused on improving a technique called base editing, which allows scientists to change specific DNA letters (from C:G to T:A) without damaging the DNA structure. The researchers created new versions of the editing tool—called BE4 and SaBE4—that are about 50% more efficient and produce fewer unwanted changes compared to earlier models. This advancement is significant because it helps ensure that the desired genetic changes can be made more accurately, reducing errors that could lead to potential issues in therapies.
Who this helps: This benefits researchers and patients seeking more precise genetic therapies.
Programmable base editing of A•T to G•C in genomic DNA without DNA cleavage.
2017
Nature
Gaudelli NM, Komor AC, Rees HA, Packer MS, Badran AH +2 more
Plain English This study looked at a new way to change specific parts of DNA to treat genetic diseases by converting A•T base pairs into G•C pairs. Researchers developed special tools called adenine base editors (ABEs) that can efficiently make this change in human cells with about 50% success and extremely high accuracy (99.9% purity). This finding is important because it allows scientists to potentially correct disease-causing mutations in a cleaner and more effective way than previous methods.
Who this helps: This advances treatment options for patients with genetic disorders.
β-Lactam formation by a non-ribosomal peptide synthetase during antibiotic biosynthesis.
2015
Nature
Gaudelli NM, Long DH, Townsend CA
Plain English This study focused on a special kind of enzyme that plays a key role in making antibiotics, specifically looking at how it creates a part of the antibiotic nocardicin. Researchers discovered that this enzyme not only builds a certain type of peptide but also forms an important structure known as the β-lactam ring, which is crucial for the antibiotic's effectiveness. This insight into how these antibiotics are made could lead to new ways to design and produce antibiotics that can more effectively target bacterial infections.
Who this helps: This benefits researchers and pharmaceutical companies working on new antibiotics.
Epimerization and substrate gating by a TE domain in β-lactam antibiotic biosynthesis.
2014
Nature chemical biology
Gaudelli NM, Townsend CA
Plain English This study looked at a specific part of a protein involved in making a type of antibiotic called nocardicin A. Researchers found that this protein, known for releasing the finished antibiotic, actually also keeps the building blocks together until the antibiotic is fully formed. It was discovered that this process involves changing the structure of the building blocks and then splitting them off as a complete product.
Who this helps: This benefits researchers and pharmaceutical developers working on new antibiotics.
Stereocontrolled syntheses of peptide thioesters containing modified seryl residues as probes of antibiotic biosynthesis.
2013
The Journal of organic chemistry
Gaudelli NM, Townsend CA
Plain English This study focused on creating special peptide molecules that include modified versions of amino acids to help researchers understand how certain antibiotics are made. The researchers successfully produced these peptides with high yields, achieving over 95% in some cases, by keeping them away from light to prevent degradation during the synthesis process. This work is important because it lays the groundwork for studying the enzymes responsible for producing nocardicin, a type of antibiotic, which could lead to better antibiotic development.
Who this helps: This helps researchers and scientists working on antibiotic development.