Glucosamine hydrochloride (D-Glucosamine hydrochloride) is an amino sugar and a prominent precursor in the biochemical synthesis of glycosylated proteins and lipids, is used as a dietary supplement. Glucosamine hydrochloride also is a natural constituent of glycosaminoglycans in the cartilage matrix and synovial fluid, which when administered exogenously, exerts pharmacological effects on osteoarthritic cartilage and chondrocytes[1].

Glucosamine hydrochloride (D-Glucosamine hydrochloride) exhibits dose-dependent DPPH antioxidant activity[2]. Glucosamine hydrochloride treatment of Short-term (4 h) inhibits HIF-1α at the protein level, decreases phosphorylation of p70S6K and S6, translation-related proteins[3]. Glucosamine hydrochloride significantly decreases renal expression of α-smooth muscle actin, collagen I, and fibronectin in the obstructed kidneys and TGF-β1-treated renal cells[4].

References:
[1]. Bruyère O, et al. Efficacy and safety of glucosamine sulfate in the management of osteoarthritis: Evidence from real-life setting trials and surveys. Semin Arthritis Rheum. 2016 Feb;45(4 Suppl):S12-7.
[2]. Jamialahmadi K, et al. Protective effects of glucosamine hydrochloride against free radical-induced erythrocytes damage. Environ Toxicol Pharmacol. 2014 Jul;38(1):212-9.
[3]. Jo JR, et al. Short-term treatment with glucosamine hydrochloride specifically downregulates hypoxia-inducible factor-1α at the protein level in YD-8 human tongue cancer cells. Int J Oncol. 2014 May;44(5):1699-706.
[4]. Park J, et al. Glucosamine hydrochloride exerts a protective effect against unilateral ureteral obstruction-induced renal fibrosis by attenuating TGF-β signaling. J Mol Med (Berl). 2013 Nov;91(11):1273-84.