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Research Articles

December 2020

Resveratrol ameliorates sevoflurane-induced cognitive impairment by activating the SIRT1/NF-κB pathway in neonatal mice
Journal of Nutritional Biochemistry December 31, 2020

Emerging Role of Long Noncoding RNAs in Perioperative Neurocognitive Disorders and Anesthetic-Induced Developmental Neurotoxicity
Anesthesia & Analgesia December 16, 2020

Hypotension and adverse neurodevelopmental outcomes among children with multiple exposures to general anesthesia: Subanalysis of the Mayo Anesthesia Safety in Kids (MASK) Study
Paediatric Anaesthesia December 15, 2020

Sevoflurane-induced neuronal apoptosis in neonatal mice is prevented with intranasal administration of insulin
American Journal of Translational Research December 15, 2020

Neurodevelopmental Outcomes after Premedication with Atropine/Propofol vs Atropine/Atracurium/Sufentanil for Neonatal Intubation: 2-Year Follow-Up of a Randomized Clinical Trial
The Journal of Pediatrics December 8, 2020

Sevoflurane Exposure Induces Neuronal Cell Parthanatos Initiated by DNA Damage in the Developing Brain via an Increase of Intracellular Reactive Oxygen Species
Frontiers in Cellular Neuroscience December 3, 2020

Neonatal exposure to ketamine disrupts developmental synapse unsilencing and predisposes adult mice for stressor-evoked anxiety
Neuropharmacology December 1, 2020

Prenatal sevoflurane exposure: Effects of iron metabolic dysfunction on offspring cognition and potential mechanism
International Journal of Developmental Neuroscience December 1, 2020

October 2020

Neuroprotection of the Developing Brain by Dexmedetomidine Is Mediated by Attenuating Single Propofol-induced Hippocampal Apoptosis and Synaptic Plasticity Deficits
Experimental Neurobiology October 31, 2020

Behavior and Regional Cortical BOLD Signal Fluctuations Are Altered in Adult Rabbits After Neonatal Volatile Anesthetic Exposure
Frontiers in Neuroscience October 23, 2020

Attention deficit hyperactivity disorder and educational level in adolescent and adult individuals after anesthesia and abdominal surgery during infancy
PLOS One October 21, 2020

miR-455-3p alleviates propofol-induced neurotoxicity by reducing EphA4 expression in developing neurons
Biomarkers October 18, 2020

An Overview on the Mechanisms of Neuroprotection and Neurotoxicity of Isoflurane and Sevoflurane in Experimental Studies
Brain Research Bulletin October 17, 2020

MicroRNA-204-5p mediates sevoflurane-induced cytotoxicity in HT22 cells by targeting brain-derived neurotrophic factor
Histology & Histopathology October 2, 2020

Androgenic Modulation of the Chloride Transporter NKCC1 Contributes to Age-dependent Isoflurane Neurotoxicity in Male Rats
Anesthesiology October 1, 2020

A Methyltransferase Inhibitor (Decitabine) Alleviates Intergenerational Effects of Paternal Neonatal Exposure to Anesthesia With Sevoflurane
Anesthesia & Analgesia October 2020

Effects of ketamine on neurogenesis, extracellular matrix homeostasis and proliferation in hypoxia-exposed HT22 murine hippocampal neurons.
Biomedical Reports October 2020

Sevoflurane leads to learning and memory dysfunction via breaking the balance of tPA/PAI-1.
Neurochemistry International October 2020

September 2020

Maternal sevoflurane exposure affects differentiation of hippocampal neural stem cells by regulating miR-410-3p and ATN1
Stem Cell Research & Therapy September 29, 2020

Anesthesia plus surgery in neonatal period impairs preference for social novelty in mice at the juvenile age.
Biochemical and Biophysical Research Communications September 24, 2020

Early childhood general anesthesia exposure associated with later developmental delay: A national population-based cohort study
PLOS One September 24, 2020

Protective role of protocatechuic acid in sevoflurane-induced neuron apoptosis, inflammation and oxidative stress in mice
Restorative Neurology and Neuroscience September 24, 2020

Conditions requiring hospitalisations, more than general anaesthesia itself, are associated with diagnosis of learning disorders in children
Anaesthesia Critical Care & Pain Medicine September 23, 2020

Effects of early postnatal sevoflurane exposure on oligodendrocyte maturation and myelination in cerebral white matter of the rat
Biomedicine & Pharmacotherapy September 18, 2020

Neonatal exposure to sevoflurane expands the window of vulnerability to adverse effects of subsequent exposure to sevoflurane and alters hippocampal morphology via decitabine-sensitive mechanisms
Neuroscience Letters September 14, 2020

Sevoflurane Post-Conditioning Ameliorates Neuronal Deficits and Axon Demyelination After Neonatal Hypoxic Ischemic Brain Injury: Role of Microglia/Macrophage
Cellular and Molecular Neurobiology September 2, 2020

Propofol inhibits the expression of Abelson nonreceptor tyrosine kinase without affecting learning or memory function in neonatal rats
Brain and Behavior September 1, 2020

Is Anesthesia Bad for the Brain? Current Knowledge on the Impact of Anesthetics on the Developing Brain.
Anesthesiology Clinics September 2020

Sevoflurane Induces Hippocampal Neuronal Apoptosis by Altering the Level of Neuropeptide Y in Neonatal Rats.
Neurochemical Research September 2020

Tau Contributes to Sevoflurane-induced Neurocognitive Impairment in Neonatal Mice
Anesthesiology September 2020

The protective effect of trilobatin against isoflurane-induced neurotoxicity in mouse hippocampal neuronal HT22 cells involves the Nrf2/ARE pathway
Toxicology September 2020

The Unspoken Question!
Anesthesia & Analgesia September 2020

Yes‑associated protein protects and rescues SH‑SY5Y cells from ketamine‑induced apoptosis
Molecular Medicine Reports September 2020

May 2020

Optimization of Ultrasound Backscatter Spectroscopy to Assess Neurotoxic Effects of Anesthesia in the Newborn Non-human Primate Brain
Ultrasound in Medicine and Biology May 29, 2020

Neonatal Exposure to Anesthesia Leads to Cognitive Deficits in Old Age: Prevention With Intranasal Administration of Insulin in Mice
Neurotoxicity Research May 26, 2020

Neonatal Ketamine Alters High-Frequency Oscillations and Synaptic Plasticity in the Subiculum But Does not Affect Sleep Macrostructure in Adolescent Rats
Frontiers in Systems Neuroscience May 26, 2020

Neuroendocrine, epigenetic, and intergenerational effects of general anesthetics
World Journal of Psychiatry May 19, 2020

Upregulation of miR-215 attenuates propofol-induced apoptosis and oxidative stress in developing neurons by targeting LATS2.
Molecular Medicine May 6, 2020

Neurotoxicity of Sub-Anesthetic Doses of Sevoflurane and Dexmedetomidine Co-Administration in Neonatal Rats
NeuroToxicology May 5, 2020

Upregulation of miR-496 Rescues Propofol-Induced Neurotoxicity by Targeting Rho Associated Coiled-Coil Containing Protein Kinase 2 (ROCK2) in Prefrontal Cortical Neurons
Current Neurovascular Research May 5, 2020

Acetyl-l-carnitine Does Not Prevent Neurodegeneration in a Rodent Model of Prolonged Neonatal Anesthesia
Neurotoxicology and Teratology May 3, 2020

Standards for Preclinical Research and Publications in Developmental Anaesthetic Neurotoxicity: Expert Opinion Statement From the SmartTots Preclinical Working Group
British Journal of Anaesthesia May 2020

FAQ

What is SmartTots?
SmartTots is a Public-Private Partnership (PPP) between the US Food and Drug Administration (FDA) and the International Anesthesia Research Society (IARS). The mission of this partnership is to coordinate and fund a research program with the goal of ensuring safe surgery for the millions of infants and young children who undergo anesthesia and/or sedation each year.
What is the National Center for Toxicological Research (NCTR)?
NCTR is an internationally recognized research center at the FDA that supports the goal of improving patient and consumer safety. NCTR, along with other centers at the FDA, conducts research to support the scientific basis for the FDA’s regulatory decisions and reduce risks associated with products regulated by the FDA. One of the ways that NCTR helps assess possible risks to human health is to perform animal research studies that investigate the potential for adverse effects and mechanisms of injury following exposure to potentially dangerous chemicals.
How did the concerns about the safety of anesthetic drugs for infants and young children arise?
The FDA’s National Center for Toxicological Research (NCTR), as well as investigators at several universities, conducted research to study the effects of anesthetics on the nervous systems of developing animals. This research demonstrated that exposure to some anesthetics and sedatives caused memory and learning difficulties and other harmful changes in the central nervous systems of some laboratory animals. Currently, inadequate data exist to prove or disprove whether similar effects occur in children. More information on the results of early animal studies is below.
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Consensus Statement

A growing body of evidence from animal studies and observational studies in humans suggests adverse effects on behavior, learning, and memory may result from exposure to anesthetics and sedation during periods of rapid brain development. In June 2014 the International Anesthesia Research Society and US Food and Drug Administration convened a group of experts in anesthesia, pediatric medicine, neuroscience, and patient safety to consider the evidence and what it means for health care providers and parents.  The SmartTots Consensus Statement on the Use of Anesthetic and Sedative Drugs in Infants, Toddlers, and Preschool Children is the result of many hours of deliberation by that diverse group of experts along with feedback from more than 20 stakeholder organizations.

Scientific Presentations

IARS 2015 Annual Meeting and International Science Symposium

Improving Health through Discovery and Education

Neurotoxicity of Anesthetics in the Developing Brain – A Translational Update

Key Summary Points

Neurotoxicity of Anesthetics in the Developing Brain
  1. The major excitatory neurotransmitter, glutamate, and the major inhibitory neurotransmitter, gamma-aminobutyric acid (GABA), are generally associated with neuronal communication in the adult brain.
  2. In the developing brain, these transmitters play a central role in brain morphogenesis, including synapse formation, proliferation, migration, differentiation and survival of neurons.