H-D-Arg-OH

H-D-Arg-OH is a D-configuration non-natural amino acid with important applications in drug development and protein engineering^[1-2]. H-D-Arg-OH is commonly used in studies related to the L-arginine/nitric oxide pathway and has shown potential in inhibiting the proliferation of certain cancer cells^[3-4].

In vitro, pretreatment of pituitary GH3 cells with H-D-Arg-OH (10mM) for 15–240 minutes, followed by incubation in normal Krebs solution, significantly increased intracellular D-arginine concentration and nitric oxide (NO) production, while also elevating extracellular nitrite levels^[5]. Combined pretreatment of Actinomyces viscosus biofilms with 8mM H-D-Arg-OH and 0.01% α-amylase (Amy) for 30 minutes significantly enhanced the dissociation effect of α-amylase on the biofilm, completely hydrolyzing extracellular polysaccharides while maintaining safety toward MC3T3-E1 pre-osteoblasts^[6].

In vivo, oral administration of H-D-Arg-OH (1000mg/kg/day) via drinking water to 9-week-old male Sprague-Dawley rats for 16 weeks significantly increased endothelial nitric oxide synthase (eNOS) protein expression in the kidneys and aorta, while also raising urea levels in skeletal muscle^[7]. After oral administration of H-D-Arg-OH (6mmol/10mL DW/kg) to ICR mice for 30, 60, and 90 minutes, a significant increase in H-D-Arg-OH levels was observed in both plasma and brain tissues^[8].

References:
[1] Navarro E, Alonso SJ, Martín FA, et al. Toxicological and pharmacological effects of D-arginine. Basic Clin Pharmacol Toxicol. 2005 Sep;97(3):149-54.
[2] Kawabata A, Nishimura Y, Takagi H. L-leucyl-L-arginine, naltrindole and D-arginine block antinociception elicited by L-arginine in mice with carrageenin-induced hyperalgesia. Br J Pharmacol. 1992 Dec;107(4):1096-101.
[3] Hu B, Feng X, Wang L, et al. 5-BDBD ameliorates an OVA-induced allergic asthma by the reduction of Th2 cytokines production. Iran J Basic Med Sci. 2018 Apr;21(4):364-369.
[4] Wang L, Wu J, Wang B, et al. d-arginine-functionalized carbon dots with enhanced near-infrared emission and prolonged metabolism time for tumor fluorescent-guided photothermal therapy. J Colloid Interface Sci. 2025 Jan 15;678(Pt C):575-582.
[5] Melisi D, Secondo A, Montoro P, et al. Galactosyl derivatives of L-arginine and D-arginine: synthesis, stability, cell permeation, and nitric oxide production in pituitary GH3 cells. J Med Chem. 2006 Aug 10;49(16):4826-33.
[6] Li B, Cai Q, Wang Z, et al. D-arginine Enhances the Effect of Alpha-Amylase on Disassembling Actinomyces viscosus Biofilm. Front Bioeng Biotechnol. 2022 Mar 3;10:864012.
[7] Kim DR, Martin S, Desai K. The effects of a comparatively higher dose of 1000 mg/kg/d of oral L- or D-arginine on the L-arginine metabolic pathways in male Sprague-Dawley rats. PLoS One. 2023 Aug 1;18(8):e0289476.
[8] Aso K, Nishigawa T, Nagamachi S, et al. Orally administrated D-arginine exhibits higher enrichment in the brain and milk than L-arginine in ICR mice. J Vet Med Sci. 2020 Mar 5;82(3):307-313.

H-D-Arg-OH是一种D-构型的非天然氨基酸，在药物开发和蛋白质工程中具有重要应用^[1-2]。H-D-Arg-OH常被用于L-精氨酸/一氧化氮通路的相关研究，并显示出抑制某些癌细胞增殖的潜力^[3-4]。

在体外，H-D-Arg-OH（10mM）预处理垂体GH3细胞15–240分钟，随后在正常Krebs溶液中孵育，显著增加细胞内D-精氨酸的浓度和一氧化氮（NO）的生成，同时提升细胞外亚硝酸盐水平^[5]。8mM H-D-Arg-OH与0.01% α-淀粉酶（Amy）联合预处理粘性Actinomyces viscosus生物膜30分钟，显著增强α-淀粉酶对生物膜的解离作用，并彻底水解胞外多糖，同时保持对MC3T3-E1前成骨细胞的安全性^[6]。

在体内，1000mg/kg/d H-D-Arg-OH通过饮水口服处理9周龄雄性Sprague-Dawley大鼠16周，显著增加肾脏和主动脉的内皮型一氧化氮合酶（eNOS）蛋白表达，同时提高骨骼肌中尿素水平^[7]。H-D-Arg-OH（6mmol/10mL DW/kg）口服给药ICR小30分钟、60分钟和90分后观察到，口服H-D-Arg-OH显著增加H-D-Arg-OH在血浆和大脑中的水平^[8]。