Developing a novel inducible mouse model for gene therapy and enzyme replacement therapy (ERT) in succinic semialdehyde dehydrogenase deficiency (SSADHD)
Developing a novel mouse model of PTEN deletion and testing novel pharmacotherapy for PTEN Hamartoma Tumor Syndrome (PHTS).
Research Background
Dr. Lee is a trained molecular neurobiologist interested in understanding the molecular mechanisms underlying neuronal inhibition, brain plasticity and functional recovery as it pertains to brain development and brain trauma. Dr. Lee combined molecular biology and electrophysiology techniques to discover that phosphorylation-dependent turnover of potassium chloride co-transporter KCC2 controls Cl- mediated GABAergic inhibition (Lee et al., Nat Neurosci, 2011). He also used novel genetic mouse models to dissect a paracrine signaling mechanism underlying critical period (CP) plasticity control (Spatazza, Lee et al., Cell Rep, 2013; Lee et al., Mol Psychiatry, 2017).
Dr. Lee's translational research included functional recovery after nerve damage (Bei, Lee et al., Cell, 2016) and traumatic brain injury (Hsieh, Lee et al., Cerebral Cortex, 2016). More recently, Dr. Lee focuses on a rare inborn GABA metabolic disorder SSADH deficiency. By developing a SSADHD mouse tool that allows ‘on-demand’ SSADH restoration, Dr. Lee aims to contribute to the preclinical development of novel SSADHD therapies.
Selected Publications
Lee HHC, Walker JA, Williams JR, Goodier RR, Payne JA & Moss SJ (2007). Direct PKC-dependent phosphorylation regulates the cell surface stability and activity of the potassium chloride cotransporter, KCC2. The Journal of Biological Chemistry 282:29777-29784. PMID:17693402.
Lee HHC, Deeb TZ, Walker JA, Davies PA & Moss SJ (2011). NMDA receptor activity downregulates KCC2 resulting in depolarizing GABAA receptor mediated currents. Nature Neuroscience 14:736-743. PMCID: PMC3102766.
*Beurdeley M, *Spatazza J, *Lee HHC, Sugiyama S, Bernard C, Di Nardo AA, Hensch TK & Prochiantz A (2012). Otx2 binding to perineuronal nets persistently regulates plasticity in the mature visual cortex. Journal of Neuroscience 32:9429-9437. PMCID: PMC3419577. *co-first author
*Bei F, *Lee HHC, Liu X, Gunner G, Jin H, Ma L, Wang C, Hensch TK, Frank E, Sanes J, Chen C, Fagiolini M & He Z (2016). Restoration of visual function by enhancing conduction in regenerated axons. Cell 164:219-232. PMCID: PMC4863988. *co-first author
*Hsieh TH, *Lee HHC, Hameed MQ, Pascual-Leone A, Hensch TK & Rotenberg A (2016). Trajectory of parvalbumin cell impairment and loss of cortical inhibition in post-traumatic epileptogenesis. Cerebral Cortex 27:5509-5524. PMCID: PMC6075565. *co-first author
Lee HHC, Bernard C, Ye Z, Acampora D, Simeone A, Prochiantz A, Di Nardo A & Hensch TK (2017). Genetic Otx2 mis-localization delays critical period plasticity across brain regions. Mol Psychiatry 22:680-688. PMCID: PMC5400722.
MacMullin PC, Hodgson NW, Damar U, Lee HHC, Dhamne SC, Hyde D, Hameed M, Conley G, Morriss N, Qiu J, Mannix R, Hensch TK & Rotenberg A (2020). Long-term changes in excitation/inhibition balance underlies seizure susceptibility in a rodent model of repeated mild traumatic brain injury. Cerebral Cortex 30:6108-6120. PMCID: PMC8248830.
**Lee HHC, Pearl PL & Rotenberg A (2021). Enzyme replacement therapy for succinic semialdehyde dehydrogenase deficiency: relevance in aminobutyric acid plasticity. J Child Neurol. 36:1200-1209. PMCID: PMC8382780. **corresponding author
**Lee HHC, McGinty GE, Pearl PL & Rotenberg A (2022). Understanding the molecular mechanisms of succinic semialdehyde dehydrogenase deficiency (SSADHD): towards the development of SSADH-targeted medicine. Int J Mol Sci. 23:2606. PMCID: PMC8910003. **corresponding author
Publications
Institutional Variation in Fentanyl Use for Children on Extracorporeal Membrane Oxygenation. Hosp Pediatr. 2026 Jan 01; 16(1):56-65. View Abstract
Misinformation and disinformation undermine progress in pediatric research: challenges and solutions. Pediatr Res. 2025 Nov; 98(5):1600-1605. View Abstract
Meconium-related obstruction: Contemporary experience in a multi-institutional consortium. J Pediatr Surg. 2026 Jan; 61(1):162545. View Abstract
Improving Commitment to Family-Centered Care in the NICU: A Multicenter Collaborative Quality Improvement Project. J Perinatol. 2025 Nov; 45(11):1627-1635. View Abstract
Remote versus in-person pre-service neonatal resuscitation training: A noninferiority randomized controlled trial in Ethiopia. Resuscitation. 2025 Apr; 209:110556. View Abstract
The Cost of Opioid Use in High-Risk Hospitalized Infants. J Surg Res. 2024 Oct; 302:825-835. View Abstract
Institutional and Regional Variation in Opioid Prescribing for Hospitalized Infants in the US. JAMA Netw Open. 2024 03 04; 7(3):e240555. View Abstract
Consensus guidelines for the diagnosis and management of succinic semialdehyde dehydrogenase deficiency. Mol Genet Metab. 2024 May; 142(1):108363. View Abstract
Laryngeal mask use during neonatal resuscitation at birth: A United States-based survey of neonatal resuscitation program providers and instructors. Resusc Plus. 2024 Mar; 17:100515. View Abstract
Current Trends in Invasive Closure of Patent Ductus Arteriosus in Very Low Birth Weight Infants in United States Children's Hospitals, 2016-2021. J Pediatr. 2023 12; 263:113712. View Abstract
Pulmonary Hypertension in Preterm Infants Treated With Laser vs Anti-Vascular Endothelial Growth Factor Therapy for Retinopathy of Prematurity. JAMA Ophthalmol. 2022 11 01; 140(11):1085-1094. View Abstract
Guidance for Cardiopulmonary Resuscitation of Children With Suspected or Confirmed COVID-19. Pediatrics. 2022 09 01; 150(3). View Abstract
Active Treatment of Infants Born at 22-25 Weeks of Gestation in California, 2011-2018. J Pediatr. 2022 10; 249:67-74. View Abstract
Addressing bias and knowledge gaps regarding race and ethnicity in neonatology manuscript review. J Perinatol. 2022 11; 42(11):1546-1549. View Abstract
Quality improvement for neonatal resuscitation and delivery room care. Semin Perinatol. 2022 10; 46(6):151629. View Abstract
Quality Improvement for Neonatal Resuscitation and Delivery Room Care. Semin Spine Surg. 2022 May 08; 100961. View Abstract
Understanding the Molecular Mechanisms of Succinic Semialdehyde Dehydrogenase Deficiency (SSADHD): Towards the Development of SSADH-Targeted Medicine. Int J Mol Sci. 2022 Feb 26; 23(5). View Abstract
2022 Interim Guidance to Health Care Providers for Basic and Advanced Cardiac Life Support in Adults, Children, and Neonates With Suspected or Confirmed COVID-19: From the Emergency Cardiovascular Care Committee and Get With The Guidelines-Resuscitation Adult and Pediatric Task Forces of the American Heart Association in Collaboration With the American Academy of Pediatrics, American Association for Respiratory Care, the Society of Critical Care Anesthesiologists, and American Society of Anesthesiologists. Circ Cardiovasc Qual Outcomes. 2022 04; 15(4):e008900. View Abstract
2021 Interim Guidance to Health Care Providers for Basic and Advanced Cardiac Life Support in Adults, Children, and Neonates With Suspected or Confirmed COVID-19. Circ Cardiovasc Qual Outcomes. 2021 10; 14(10):e008396. View Abstract
Randomized controlled trial of the "WISER" intervention to reduce healthcare worker burnout. J Perinatol. 2021 09; 41(9):2225-2234. View Abstract
Prioritization framework for improving the value of care for very low birth weight and very preterm infants. J Perinatol. 2021 10; 41(10):2463-2473. View Abstract
Cost of clinician-driven tests and treatments in very low birth weight and/or very preterm infants. J Perinatol. 2021 02; 41(2):295-304. View Abstract
Population Improvement Bias Observed in Estimates of the Impact of Antenatal Steroids to Outcomes in Preterm Birth. J Pediatr. 2021 05; 232:17-22.e2. View Abstract
Increase in Seizure Susceptibility After Repetitive Concussion Results from Oxidative Stress, Parvalbumin-Positive Interneuron Dysfunction and Biphasic Increases in Glutamate/GABA Ratio. Cereb Cortex. 2020 11 03; 30(12):6108-6120. View Abstract
Towards personalized medicine in maternal and child health: integrating biologic and social determinants. Pediatr Res. 2021 01; 89(2):252-258. View Abstract
Interim Guidance for Basic and Advanced Life Support in Adults, Children, and Neonates With Suspected or Confirmed COVID-19: From the Emergency Cardiovascular Care Committee and Get With The Guidelines-Resuscitation Adult and Pediatric Task Forces of the American Heart Association. Circulation. 2020 06 23; 141(25):e933-e943. View Abstract
Tracheal suctioning of meconium at birth for non-vigorous infants: a systematic review and meta-analysis. Resuscitation. 2020 04; 149:117-126. View Abstract
Ceftriaxone Treatment Preserves Cortical Inhibitory Interneuron Function via Transient Salvage of GLT-1 in a Rat Traumatic Brain Injury Model. Cereb Cortex. 2019 12 17; 29(11):4506-4518. View Abstract
Racial and Ethnic Disparities in Human Milk Intake at Neonatal Intensive Care Unit Discharge among Very Low Birth Weight Infants in California. J Pediatr. 2020 03; 218:49-56.e3. View Abstract
Safety climate, safety climate strength, and length of stay in the NICU. BMC Health Serv Res. 2019 Oct 22; 19(1):738. View Abstract
Racial Segregation and Inequality in the Neonatal Intensive Care Unit for Very Low-Birth-Weight and Very Preterm Infants. JAMA Pediatr. 2019 05 01; 173(5):455-461. View Abstract
Survey of preterm neuro-centric care practices in California neonatal intensive care units. J Perinatol. 2019 02; 39(2):256-262. View Abstract
Birth Hospitalization Costs and Days of Care for Mothers and Neonates in California, 2009-2011. J Pediatr. 2019 01; 204:118-125.e14. View Abstract
Incidence Trends and Risk Factor Variation in Severe Intraventricular Hemorrhage across a Population Based Cohort. J Pediatr. 2018 09; 200:24-29.e3. View Abstract
Trajectory of Parvalbumin Cell Impairment and Loss of Cortical Inhibition in Traumatic Brain Injury. Cereb Cortex. 2017 12 01; 27(12):5509-5524. View Abstract
Racial/Ethnic Disparity in NICU Quality of Care Delivery. Pediatrics. 2017 Sep; 140(3). View Abstract
Short-term costs of preeclampsia to the United States health care system. Am J Obstet Gynecol. 2017 09; 217(3):237-248.e16. View Abstract
Teamwork in the NICU Setting and Its Association with Health Care-Associated Infections in Very Low-Birth-Weight Infants. Am J Perinatol. 2017 08; 34(10):1032-1040. View Abstract
Genetic Otx2 mis-localization delays critical period plasticity across brain regions. Mol Psychiatry. 2017 05; 22(5):680-688. View Abstract
Trends in the delivery route of twin pregnancies in the United States, 2006-2013. Eur J Obstet Gynecol Reprod Biol. 2016 Oct; 205:120-6. View Abstract
Restoration of Visual Function by Enhancing Conduction in Regenerated Axons. Cell. 2016 Jan 14; 164(1-2):219-232. View Abstract
Comparing NICU teamwork and safety climate across two commonly used survey instruments. BMJ Qual Saf. 2016 12; 25(12):954-961. View Abstract
Effect of Catheter Dwell Time on Risk of Central Line-Associated Bloodstream Infection in Infants. Pediatrics. 2015 Dec; 136(6):1080-6. View Abstract
KCC2 activity is critical in limiting the onset and severity of status epilepticus. Proc Natl Acad Sci U S A. 2015 Mar 17; 112(11):3523-8. View Abstract
Tyrosine phosphorylation regulates the membrane trafficking of the potassium chloride co-transporter KCC2. Mol Cell Neurosci. 2010 Oct; 45(2):173-9. View Abstract
Direct protein kinase C-dependent phosphorylation regulates the cell surface stability and activity of the potassium chloride cotransporter KCC2. J Biol Chem. 2007 Oct 12; 282(41):29777-84. View Abstract
Identification of the sites for CaMK-II-dependent phosphorylation of GABA(A) receptors. J Biol Chem. 2007 Jun 15; 282(24):17855-65. View Abstract
Transcriptional regulation of acetylcholinesterase-associated collagen ColQ: differential expression in fast and slow twitch muscle fibers is driven by distinct promoters. J Biol Chem. 2004 Jun 25; 279(26):27098-107. View Abstract
Muscle induces neuronal expression of acetylcholinesterase in neuron-muscle co-culture: transcriptional regulation mediated by cAMP-dependent signaling. J Biol Chem. 2003 Nov 14; 278(46):45435-44. View Abstract
ATP induces post-synaptic gene expressions in vertebrate skeletal neuromuscular junctions. J Neurocytol. 2003 Jun-Sep; 32(5-8):603-17. View Abstract