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Kwang-Hyun Hur

Department of Pharmacology, School of Pharmacy, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, 16419, Republic of Korea.

2 papers in the library · 10 citations · publishing 2021-2026

Papers

New designer phenethylamines 2C-C and 2C-P have abuse potential and induce neurotoxicity in rodents.

Archives of toxicology April 1, 2021 Young-Jung Kim, Shi-Xun Ma, Kwang-Hyun Hur et al. 10 citations

The drugs 2C-C and 2C-P, members of the 2C family of phenethylamines, show abuse potential and neurotoxic effects at high doses in animal models. In mice, both drugs produced conditioned place preference in a dose-dependent manner and increased self-administration in rats, indicating abuse potential. High doses decreased locomotor activity, rota-rod performance, and scores on memory tests (Y-maze, novel object recognition, passive avoidance). The drugs altered expression of D1 and D2 dopamine receptors, the dopamine transporter, and its phosphorylated form in the nucleus accumbens and medial prefrontal cortex, and increased c-Fos-positive cells in the nucleus accumbens. High doses also activated microglia, suggesting neuroinflammation in the striatum.

Δ 9 -Tetrahydrocannabinol-induced enhancement of reward responsivity via mesocorticolimbic modulation in squirrel monkeys.

bioRxiv : the preprint server for biology January 24, 2026 Kwang-Hyun Hur, Lisa D Nickerson, Jack Bergman et al.

THC, the psychoactive compound in cannabis, selectively amplifies behavioral and brain responses to cues that predict rewards, without affecting responses to neutral cues or baseline reward consumption. In squirrel monkeys, a low dose of THC (3 μg/kg) increased conditioned approach behavior toward a visual stimulus associated with food delivery. Functional MRI showed that THC enhanced activity in reward-related brain regions—anterior cingulate cortex, striatum, hippocampus, and substantia nigra-ventral tegmental area (SN-VTA)—while leaving visual and motor cortices unaffected. Resting-state connectivity analyses revealed that THC strengthened communication within mesocorticolimbic networks, with the SN-VTA acting as a central hub. These findings indicate that THC boosts incentive salience and motivational drive toward reward-associated stimuli through selective modulation of this circuitry.