LQT Therapeutics: targeting precision cardiology

Amplitude Ventures
Amplitude VC
Published in
4 min readAug 10, 2021

Today LQT Therapeutics announced the close of $19M US Series A Financing. We’re excited to lead this financing to build a company pioneering the development of precision therapies for genetic heart disease. LQT is another example of Amplitude’s strategy of creating, building, and growing innovative precision medicine companies.

The company was launched in 2019 by fellow VC and long-standing partner FSTQ based on the novel understanding of the molecular mechanisms underlying Long QT Syndrome (LQTS). We were interested in the early science and supported the founding team to continue to develop the chemistry and expand the pipeline to include resistant cancers. We’ve also known Paul Truex and Phillip Sager, two founding members of the LQT Therapeutics team, from their previous experience in cardiology drug development and are thrilled to work alongside them again at LQT Therapeutics.

What is LQT syndrome:

Long QT syndrome (LQTS) is a heart rhythm condition that can potentially cause fast, chaotic heartbeats that can lead to sudden death. When the heart pumps your blood, it’s controlled by an electrical circuit that keeps the heart’s rhythm in check. When this heart rhythm is extended, this increases the length of time your heart beats.

Source: LQT Therapeutics

This increase in QT interval, as seen above, can result in an irregular heartbeat leading to fainting, seizures or possible sudden death. The underlying mechanism of the disease involves ion channels within the heart that regulate the heart’s rhythm. There is a subset of patients who are born with congenital LQT syndrome caused by genetic abnormalities. These patients have defects in the ion channels in their heart which puts them at increased likelihood of developing the condition. Often undiagnosed, it is believed to result in 3,000 to 4,000 sudden deaths in children and young adults each year in the United States and Canada.

How LQT Therapeutics is solving the problem:

Cardiovascular disease remains the leading cause of death, impaired quality of life and healthcare resource consumption in the Western world. However, the number of clinical trials in the cardiovascular space has remained flat and one of the lowest amongst all therapeutic areas in the last 10 years.

Recent advances in genomics and molecular biology have shed light on the key mechanistic drivers of cardiovascular disease, opening the door for targeted therapies with the potential to reduce adverse effects and improve outcomes in stratified patient populations.

In LQTS, the signaling pathways that control these channels were recently elucidated by the company’s leading scientific advisors. Their research highlighted the potential for SGK1, a kinase involved in ion channel regulation, to correct the prolonged QT interval. The team has advanced a portfolio of potential therapies that target this underlying mechanism of disease to reduce the propensity for patients to develop life-threatening ventricular arrhythmias.

Why we’re excited:

LQT Therapeutics is a fantastic fit with Amplitude’s vision of creating, building and growing world-class Canadian precision medicine companies. With an exceptional leadership team in Montreal, Boston and San Francisco with extensive drug development experience in the cardiovascular space, a world-class SAB and the potential to expand the pipeline to other precision cardiac diseases, we’re excited to build LQT Therapeutics into becoming a leading precision cardiology company to bring novel treatments to patients.

-Amplitude team

About Amplitude Ventures

Amplitude Ventures deploys a growth model that has successfully been used to build Canadian companies with world-class management teams and scale companies to breakout potential. Amplitude, with offices in Montreal, Toronto, and Vancouver, launched its first private capital fund in November 2019, a $200-million fund that applies a proven, evidence-based approach to investing in leading Canadian precision medicine companies.

About LQT Therapeutics

LQT Therapeutics, Inc. is pioneering a precision medicine approach to treat patients with Long QT Syndrome and potentially other arrhythmias based on research from Beth Israel Deacons Medical Center, Massachusetts General Hospital, and Sanofi, S.A. By combining leading-edge cardiovascular genetics and diagnostics with recent advances in the understanding of the role of SGK1, LQT Therapeutics seeks to make a meaningful difference in the lives of people suffering from Long QT Syndrome and resistant cancers. Launched in 2019 by Fonds de Solidarité des travailleurs du Québec (F.T.Q.), LQT Therapeutics was founded by world-class experts in cardiovascular disease, cardiac muscle biology and drug development. For more information, please visit www.lqttrx.com

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Amplitude Ventures
Amplitude VC

Canada's leading healthcare venture fund focused on precision medicine