Guillermo Palchik

Guillermo Palchik
California Pacific Medical Center Research Institute · Transplant and Advanced Organ Therapies

Ph.D.

About

17
Publications
3,139
Reads
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579
Citations
Additional affiliations
April 2015 - present
California Pacific Medical Center Research Institute
Position
  • Neuroethics Fellow
August 2012 - March 2015
University of Texas Southwestern Medical Center
Position
  • PostDoc Position
August 2004 - May 2012
Georgetown University
Position
  • PhD Student

Publications

Publications (17)
Article
Introduction: Methamphetamine, an addictive stimulant, may lead to psychosis of which little is known about the impact in acute stroke. Despite its short half-life, we hypothesize that methamphetamine use in acute stroke is associated with the development of psychosis and extends hospital length of stay (LOS). Methods: Single-center retrospective a...
Article
Full-text available
The COVID-19 pandemic has necessitated a rapid escalation in the use of telepsychiatry. Herein we revisit some of the ethical issues regarding its use, including patient benefice, distributive justice, privacy, and autonomy. Based on these considerations we would hold that telepsychiatry is a vital aspect of providing psychiatric care, and ethicall...
Article
Full-text available
Introduction Disruption of sleep may have significant implications in acute brain injury, functional recovery, and critical illness. Few data exist characterizing sleep architecture in patients admitted to an intensive care unit (ICU). We aim to describe sleep and clinical characteristics in patients with acute brain injury and critical illness. M...
Article
This paper recounts the author’s conversations with Ryan Farnsworth, a 30-year-old ALS patient who consented to be interviewed for the purpose of improving communication between physicians and patients. Under the California End of Life Option (ELOA), the patient had been prescribed medication that would allow him to end his life at a time of his ch...
Article
Full-text available
Three-prime repair exonuclease 1 knockout (Trex1(-/-)) mice suffer from systemic inflammation caused largely by chronic activation of the cyclic GMP-AMP synthase-stimulator of interferon genes-TANK-binding kinase-interferon regulatory factor 3 (cGAS-STING-TBK1-IRF3) signaling pathway. We showed previously that Trex1-deficient cells have reduced mam...
Article
Full-text available
Neurotoxicity of human immunodeficiency virus-1 (HIV) includes synaptic simplification and neuronal apoptosis. However, the mechanisms of HIV-associated neurotoxicity remain unclear, thus precluding an effective treatment of the neurological complications. The present study was undertaken to characterize novel mechanisms of HIV neurotoxicity that m...
Article
DNA-dependent protein kinase catalytic subunit (DNA-PKcs) and Ataxia telangiectasia mutated (ATM) are the two major kinases involved in DNA double-strand break (DSB) repair, and are required for cellular resistance to ionizing radiation. While ATM is the key upstream kinase for DSB signaling, DNA-PKcs is primarily involved in DSB repair through the...
Article
Full-text available
The hippocampus has a well-documented role for spatial navigation across species, but its role for spatial memory in nonnavigational tasks is uncertain. In particular, when monkeys are tested in tasks that do not require navigation, spatial memory seems unaffected by lesions of the hippocampus. However, the interpretation of these results is compro...
Article
Full-text available
Direct cellular DNA damage may lead to genome destabilization in unexposed, bystander, cells sharing the same milieu with directly damaged cells by means of the bystander effect. One proposed mechanism involves double strand break (DSB) formation in S phase cells at sites of single strand lesions in the DNA of replication complexes, which has a mor...
Article
Previous work has indicated an association between seizures early in life and increased risk of psychiatric disorders, including schizophrenia. However, because early-life seizures are commonly treated with antiepileptic drugs (AEDs) such as phenobarbital, the possibility that drug treatment may affect later-life psychiatric outcomes needs to be ev...
Article
Chronic activation or inhibition of cannabinoid receptors (CB1) leads to continuous suppression of neuronal plasticity in hippocampus and other brain regions, suggesting that endocannabinoids may have a functional role in synaptic processes that produce state-dependent transient modulation of hippocampal cell activity. In support of this, it has pr...
Article
A number of human immunodeficiency virus type-1 (HIV) positive subjects are also opiate abusers. These individuals are at high risk to develop neurological complications. However, little is still known about the molecular mechanism(s) linking opiates and HIV neurotoxicity. To learn more, we exposed rat neuronal/glial cultures prepared from differen...
Article
Full-text available
This reviews the first of a tripartite symposia series dealing with novel neuroscientific technologies, the nature of consciousness and being, and the questions that arise from such interactions. The event took place on May 8 2009, at Georgetown University, and brought together ten leading figures on fields ranging from Neuroscience and Robotics to...
Article
Full-text available
The field of small interfering RNA (siRNA) as potent sequence-selective inhibitors of transcription is rapidly developing. However, until now, low transfection efficiency, poor tissue penetration, and nonspecific immune stimulation by in vivo administered siRNAs have delayed their therapeutic application. Their potential as anticancer therapeutics...

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Projects

Project (1)
Project
Neuroethics Fellow, PMHV