JAMES R. LIGAS, M.D.

SPRINGFIELD, MA

Research Active
Internal Medicine - Critical Care Medicine NPI registered 21+ years 4 publications 1999 – 2019 NPI: 1336145556
MutationCritical CareEducation, Medical, UndergraduateMitochondriaProteomicsArabidopsisEvolution, MolecularMitochondrial Proton-Translocating ATPasesOxidative PhosphorylationElectron Transport Complex IElectron TransportViscum albumAlkalosis, RespiratoryHyperventilationLeigh Disease

Practice Location

759 CHESTNUT ST
SPRINGFIELD, MA 01199-1001

Phone: (413) 794-5439

What does JAMES LIGAS research?

Dr. Ligas studies the assembly and function of complex I, an important enzyme in the energy production process, particularly in plants like Arabidopsis thaliana and European mistletoe. He explores how these plants differ from humans in building this enzyme, which helps reveal why certain energy deficiencies can lead to health problems in both types of organisms. Additionally, he investigates Leigh syndrome, a genetic disorder that affects brain function, examining how factors like breathing patterns can influence the severity of symptoms in patients.

Key findings

  • In Arabidopsis thaliana, researchers found that the assembly process of complex I differs from humans, potentially enhancing our understanding of energy production defects.
  • European mistletoe was shown to have at least five times lower levels of key proteins involved in energy production, indicating a reliance on alternative energy processes due to the loss of complex I.
  • In patients with the m.9185T>C variant related to Leigh syndrome, one patient improved when her breathing rate decreased, suggesting that controlled breathing might alleviate some symptoms of this serious disorder.

Frequently asked questions

Does Dr. Ligas study plants?
Yes, he studies plants like Arabidopsis thaliana and European mistletoe to understand their energy production processes.
What conditions has Dr. Ligas researched?
He has researched Leigh syndrome, a genetic disorder affecting brain function, and how breathing patterns can impact its severity.
Is Dr. Ligas's work relevant to people with Leigh syndrome?
Yes, his findings about breathing patterns could offer new insights into managing symptoms for patients with Leigh syndrome.
How does Dr. Ligas's research help scientists?
His work enhances the understanding of mitochondrial functions, which could inform future studies on energy production in both plants and humans.

Publications in plain English

The assembly pathway of complex I in Arabidopsis thaliana.

2019

The Plant journal : for cell and molecular biology

Ligas J, Pineau E, Bock R, Huynen MA, Meyer EH

Plain English
Researchers studied how a key enzyme, called complex I, is built in the plant Arabidopsis thaliana. They found that the assembly process is different from that in humans and that plants follow an older method of assembling complex I. This matters because understanding these differences can shed light on why defects in complex I can cause significant health problems in both plants and animals. Who this helps: This helps scientists and plant researchers understand mitochondrial functions better.

PubMed

Leigh syndrome in individuals bearing m.9185T>C MTATP6 variant. Is hyperventilation a factor which starts its development?

2018

Metabolic brain disease

Piekutowska-Abramczuk D, Rutyna R, Czyżyk E, Jurkiewicz E, Iwanicka-Pronicka K +14 more

Plain English
This study looked at Leigh syndrome, a serious brain disorder caused by genetic changes, specifically the m.9185T>C variant. Researchers examined three patients and found that their bodies were reacting to excessive breathing, or hyperventilation, which might worsen their condition. Notably, one patient improved when her breathing rate slowed, suggesting that under-breathing could actually help those with this genetic variant. Who this helps: This information benefits patients with Leigh syndrome and their doctors.

PubMed

Absence of Complex I Is Associated with Diminished Respiratory Chain Function in European Mistletoe.

2018

Current biology : CB

Maclean AE, Hertle AP, Ligas J, Bock R, Balk J +1 more

Plain English
This study looked at the European mistletoe, a type of plant that relies on other plants for nutrition, and found that it has lost important parts of its cellular machinery needed for energy production. Specifically, it lacks complex I, which means its ability to produce energy through respiration is severely limited. The mistletoe showed at least five times lower levels of key proteins compared to a non-parasitic plant, indicating that it depends less on traditional energy pathways and more on other processes for energy. Who this helps: This research helps scientists understand how parasitic plants adapt and survive, potentially guiding future studies on plant evolution and ecology.

PubMed

A critical care subinternship using the ICU as an applied physiology laboratory.

1999

Academic medicine : journal of the Association of American Medical Colleges

Palmisano J, McNally D, Ligas J

PubMed

Frequent Co-Authors

Ralph Bock Etienne H Meyer Emmanuelle Pineau Martijn A Huynen Andrew E Maclean Alexander P Hertle Janneke Balk Dorota Piekutowska-Abramczuk Rafał Rutyna Elżbieta Czyżyk

Physician data sourced from the NPPES NPI Registry . Publication data from PubMed . Plain-English summaries generated by AI. Not medical advice.