Article
Neurosciences
Megan A. Johnson, Natalina H. Contoreggi, Joshua F. Kogan, Matthew Bryson, Batsheva R. Rubin, Jason D. Gray, Mary Jeanne Kreek, Bruce S. McEwen, Teresa A. Milner
Summary: Chronic immobilization stress leads to sex-dependent changes in opioid gene expression in the rat hippocampus, potentially affecting the ability of male rats to acquire conditioned place preference to oxycodone.
JOURNAL OF COMPARATIVE NEUROLOGY
(2021)
Article
Behavioral Sciences
Jasna Chalangal, Sanoara Mazid, Kyle Windisch, Teresa A. Milner
Summary: The abuse of opioids, particularly among women, has increased over the past two decades. The hippocampal neural circuits, especially the opioid circuits, play a critical role in associative memory formation and encoding of motivational incentives, which are important in the transition from initial drug use to drug abuse/dependence. The anatomical studies in rodents have revealed sex differences in the distribution of opioid peptides and receptors in specific hippocampal circuits, and how these distributions are altered following stress and oxycodone-associative learning processes.
PHARMACOLOGY BIOCHEMISTRY AND BEHAVIOR
(2022)
Article
Chemistry, Multidisciplinary
Kuan Liang, Ganggang Zhang, Jingbo Zhao, Ling Shi, Jue Cheng, Junying Zhang
Summary: This study introduces a green strategy to prepare a series of partially bio-based, recyclable, malleable, and robust poly(amide-imine) vitrimers by incorporating amide bonds into polyimine networks. The resulting materials exhibit improved mechanical properties, thermal stability, and creep resistance due to the combination of dynamic imine exchange reactions and intermolecular hydrogen bonding of amide groups.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Review
Biochemistry & Molecular Biology
Manuel Lisardo Sanchez, Francisco D. D. Rodriguez, Rafael Covenas
Summary: Peptides play a crucial role in cancer progression, promoting mitogenesis, migration, invasion, metastasis, and anti-apoptotic mechanisms. Peptide receptors are overexpressed in tumor cells, making them potential targets for specific cancer treatments and apoptosis induction. Opioids have both anti-tumoral and pro-tumoral effects, and their involvement in cancer development is still not well understood.
Article
Pharmacology & Pharmacy
Keith M. Olson, Andrea L. Devereaux, Payal Chatterjee, Savanah L. Saldana-Shumaker, Amanda Shafer, Adam Plotkin, Ram Kandasamy, Alexander D. MacKerell, John R. Traynor, Christopher W. Cunningham
Summary: This study investigates the structure-activity relationships of benzylideneoxymorphone analogs in order to develop analgesics with reduced tolerance and side effects. One compound, nitro-BOM (NBOM), showed high-efficacy antinociception but also exhibited tolerance and toxicity upon repeated administration. Despite these issues, NBOM provides an important tool for understanding MOPr/DOPr pharmacology.
FRONTIERS IN PHARMACOLOGY
(2023)
Article
Clinical Neurology
Hao-Ruei Mei, Ya-Yu Hu, Soneet Kapadia, Tanja Ouimet, Herve Poras, Gregory Dussor
Summary: Inhibiting enkephalin degradation to elevate enkephalin levels can attenuate stress-induced migraine-like behaviors in mice, which may serve as an effective therapeutic strategy.
Article
Neurosciences
John A. Tkaczynski, Olga Borodovitsyna, Daniel J. Chandler
Summary: The noradrenergic nucleus locus coeruleus plays a crucial role in the brain's response to stress. The neuropeptide corticotropin-releasing factor (CRF) and endogenous opioid peptide enkephalin are both involved in regulating anxiety-like behavior and the behavioral response to stress within the locus coeruleus. The downregulation of delta-opioid receptors (DORs) within the locus coeruleus may mediate the effects of stress on anxiety-like behavior and locus coeruleus activity, while overexpression of DORs can block these effects. Enkephalinergic neurotransmission at DORs within the locus coeruleus is important for the behavioral response to stress and may also play a role in reward-related behavior.
Article
Chemistry, Multidisciplinary
Hui-Zhen Du, Jun-Zhen Fan, Zhong-Zhen Wang, Neil A. A. Strotman, Haifeng Yang, Bing-Tao Guan
Summary: Hydrogen isotope exchange (HIE) is an attractive method for synthesizing deuterium- and tritium-labeled compounds. This study discovered that CsN(SiMe3)2 is an efficient catalyst for selective HIE of benzylic C-H bonds with D-2 gas. The catalyst activates multiple C-H bonds and achieves high isotope enrichment with high activity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Behavioral Sciences
Luke A. Jelen, James M. Stone, Allan H. Young, Mitul A. Mehta
Summary: This article reviews the dysregulation of the opioid system in depression and the potential of pharmacological modulators of mu, delta, and kappa opioid receptors for the treatment of depression. The review presents evidence from animal and clinical studies supporting the dysregulation of the opioid system in depression, the modulation of behavioral processes and brain regions associated with depression by opioids, and the modulation of antidepressant responses by opioids. The review also evaluates clinical trials examining the safety and efficacy of opioidergic agents in depression and explores the involvement of the opioid system in the effects of other treatments, such as ketamine, that exert antidepressant effects through non-opioid actions. Furthermore, the review explores the neurochemical and molecular mechanisms underlying the therapeutic effects of opioid system engagement, providing a rationale for further investigation into this relevant target in depression treatment.
NEUROSCIENCE AND BIOBEHAVIORAL REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Fu-Peng Wu, Xiao-Feng Wu
Summary: A new selectivity-reversed borocarbonylation reaction method has been studied, which successfully synthesizes beta-boryl ketones with complete regioselectivity under the cooperative action of palladium and copper catalysts.
Article
Neurosciences
Volker Neugebauer, Peyton Presto, Vadim Yakhnitsa, Nico Antenucci, Brianna Mendoza, Guangchen Ji
Summary: Neuroplasticity in cortico-limbic circuits is important in pain persistence and modulation. The amygdala plays a key role in the emotional dimension of pain, and interactions with prefrontal cortical regions change in pain conditions. Other regions in the limbic system are also involved in pain modulation. The corticolimbic system contains opioids and opioid receptors, and their modulatory effects and potential opposing functions are still not fully understood.
Article
Chemistry, Multidisciplinary
J. Dylan Denison, A. Chathuri De Alwis, Ruby Shah, Gregory S. Mccarty, Leslie A. Sombers
Summary: This study used a planar carbon-fiber microelectrode as a sensor to detect the release dynamics of catecholamine and opioid neuropeptides from chromaffin cells. The data revealed unique kinetics for these two neurochemical classes at the single-vesicle level. The study provides unprecedented insight into key differences between catecholamine and opioid neuropeptide release from isolated chromaffin cells.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Neurosciences
Josue Jaramillo-Polanco, Cintya Lopez-Lopez, Yang Yu, Emma Neary, Alan Hegron, Meritxell Canals, Nigel W. Bunnett, David E. Reed, Alan E. Lomax, Stephen J. Vanner
Summary: This study found that chronic high-dose opioid exposure leads to opioid-induced hyperalgesia (OIH) in the gastrointestinal tract, which is mediated by DOPr signaling and dependent on receptor endocytosis and protein kinase C signaling.
JOURNAL OF NEUROSCIENCE
(2022)
Article
Biology
Magdalena J. Slusarz
Summary: Opioid receptors play a crucial role in pain perception and can be activated by opioid peptides and opiates. This study investigated the impact of conjugating glucuronic acid with enkephalin on receptor-ligand interactions. The results showed that the conjugation enhanced ligand binding, especially in the delta receptor, indicating greater selectivity towards delta opioid receptor.
COMPUTATIONAL BIOLOGY AND CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Lucile Fauvre, Etienne Fleury, Francois Ganachaud, Daniel Portinha
Summary: Silicone elastomers with self-associating bisamide groups were synthesized using aza-Michael addition. Non-crosslinked copolymers were prepared by adjusting the molar ratio of vinyl to primary amine reactive function. By increasing the molecular weight, the copolymers transformed from viscoelastic liquids to viscoelastic solids and elastomers.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Medicinal
Tom Willemse, Emilie Eiselt, Karlijn Hollanders, Wim Schepens, Herman W. T. van Vlijmen, Nga N. Chung, Veronique Blais, Brain Holleran, Jean-Michel Longpre, Peter W. Schiller, Bert U. W. Maes, Philippe Sarret, Louis Gendron, Steven Ballet
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
(2018)
Article
Biochemistry & Molecular Biology
Jean-Louis Beaudeau, Veronique Blais, Brian J. Holleran, Alexandre Bergeron, Graciela Pineyro, Brigitte Guerin, Louis Gendron, Yves L. Dory
ACS CHEMICAL NEUROSCIENCE
(2019)
Article
Pharmacology & Pharmacy
Emilie Eiselt, Jerome Cote, Jean-Michel Longpre, Veronique Blais, Philippe Sarret, Louis Gendron
EUROPEAN JOURNAL OF PHARMACOLOGY
(2019)
Article
Pharmacology & Pharmacy
Louisane Desbiens, Catherine Lapointe, Louis Gendron, Marjan Gharagozloo, Laurence Vincent, Gunnar Pejler, Denis Gris, Pedro D'Orleans-Juste
JOURNAL OF PHARMACOLOGY AND EXPERIMENTAL THERAPEUTICS
(2019)
Article
Biochemistry & Molecular Biology
Marjan Gharagozloo, Shaimaa Mahmoud, Camille Simard, Kenzo Yamamoto, Diwakar Bobbala, Subburaj Ilangumaran, Matthew D. Smith, Albert Lamontagne, Samir Jarjoura, Jean-Bernard Denault, Veronique Blais, Louis Gendron, Caries Vilarino-Guell, A. Dessa Sadovnick, Jenny P. Ting, Peter A. Calabresi, Abdelaziz Amrani, Denis Gris
Article
Biochemistry & Molecular Biology
Emilie Eiselt, Simon Gonzalez, Charlotte Martin, Magali Chartier, Cecilia Betti, Jean-Michel Longpre, Florine Cavelier, Dirk Tourwe, Louis Gendron, Steven Ballet, Philippe Sarret
ACS CHEMICAL NEUROSCIENCE
(2019)
Review
Clinical Neurology
Sophie Berthiaume, Khaled Abdallah, Veronique Blais, Louis Gendron
JOURNAL OF NEURAL TRANSMISSION
(2020)
Article
Pharmacology & Pharmacy
Emilie Eiselt, Valerie Otis, Karine Belleville, Gaoqiang Yang, Alain Larocque, Anthony Regina, Michel Demeule, Philippe Sarret, Louis Gendron
JOURNAL OF PHARMACOLOGY AND EXPERIMENTAL THERAPEUTICS
(2020)
Review
Neurosciences
Jade Degrandmaison, Olivier Grise, Jean-Luc Parent, Louis Gendron
Summary: Recent studies have highlighted DOPr as a promising therapeutic target for chronic pain management, with its specific agonists exhibiting effective analgesic responses in various animal models. Despite high homology with other opioid receptors, DOPr displays significant particularities in its molecular regulation and trafficking mechanisms. These specific amino acid motifs potentially play a crucial role in determining the receptor's trafficking and physiological responses.
JOURNAL OF NEUROSCIENCE RESEARCH
(2022)
Article
Neurosciences
Beatrice Quirion, Claudie Beaulieu, Laurie Cote, Jean-Luc Parent, Louis Gendron
Summary: This study aimed to assess the distribution of MOP and DOP in the dorsal root ganglia of mice and rats. The results showed that both receptors are expressed in all types of neurons to different extents. DOP is mainly expressed in large and medium myelinated neurons, while MOP is mainly found in C fibres. The distribution slightly differs between rats and mice.
EUROPEAN JOURNAL OF NEUROSCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Niousha Nazari, Sylvain Bernard, Daniel Fortin, Thomas Marmin, Louis Gendron, Yves L. Dory
Summary: Three C-3 symmetric macrolactams were efficiently cyclized from linear precursors by properly locating substituents, resulting in enhanced reactivity compared to the unsubstituted parent. DFT calculations showed that the reactive conformer, the properly folded cyclization precursor, was more populated than other conformers, leading to a decrease in the activation free energy. The crystal structure of the ester-substituted ring with three bulky esters revealed the preservation of tubular stacking.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Neurosciences
Charly G. Lecomte, Stephen Mari, Johannie Audet, Angele N. Merlet, Jonathan Harnie, Claudie Beaulieu, Khaled Abdallah, Louis Gendron, Ilya A. Rybak, Boris I. Prilutsky, Alain Frigon
Summary: This study investigates the recovery of locomotion in animals and people with incomplete spinal cord injury (SCI) in left-right asymmetric conditions. The results show that adjustments in kinematics and muscle activity allow individuals with incomplete SCI to retain the ability to perform asymmetric locomotion.
JOURNAL OF NEUROPHYSIOLOGY
(2022)
Article
Neurosciences
Johannie Audet, Sirine Yassine, Charly G. Lecomte, Stephen Mari, Felix Soucy, Caroline Morency, Angele N. Merlet, Jonathan Harnie, Claudie Beaulieu, Louis Gendron, Ilya A. Rybak, Boris I. Prilutsky, Alain Frigon
Summary: Spinal sensorimotor circuits interact with supraspinal and peripheral inputs to generate quadrupedal locomotion. Ascending and descending spinal pathways ensure coordination between the forelimbs and hindlimbs. Spinal cord injury (SCI) disrupts these pathways. Cats spontaneously recover quadrupedal locomotion following staggered hemisections but require balance assistance after the second one. Coordination between the forelimbs and hindlimbs displays 2:1 patterns and becomes weaker and more variable after both hemisections.
Article
Biochemistry & Molecular Biology
Dominique Bella Ndong, Veronique Blais, Brian J. Holleran, Arnaud Proteau-Gagne, Isabelle Cantin-Savoie, William Robert, Jean-Francois Nadon, Sophie Beauchemin, Richard Leduc, Graciela Pineyro, Brigitte Guerin, Louis Gendron, Yves L. Dory
Article
Biochemistry & Molecular Biology
Iness Charfi, Khaled Abdallah, Louis Gendron, Graciela Pineyro
CELLULAR AND MOLECULAR LIFE SCIENCES
(2018)