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Ajeeshkumar KK, Vishnu KV, Navaneethan R, Raj K, Remyakumari KR, Swaminathan TR, Suseela M, Asha KK, Sreekanth GP. Proteoglycans isolated from the bramble shark cartilage show potential anti-osteoarthritic properties. Inflammopharmacology 2019; 27:175-187. [PMID: 30600472 DOI: 10.1007/s10787-018-00554-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 12/14/2018] [Indexed: 01/09/2023]
Abstract
Osteoarthritis (OA) causes articular cartilage destruction, initiating pain and inflammation in the joints, resulting in joint disability. Medications are available to manage these symptoms; however, their effects on the disease progression are limited. Loss of proteoglycans (PGs) was reported to contribute articular cartilage destruction in OA. Therapeutics approaches were previously studied in the animal models of OA. In the present study, we investigated the oral efficacy of four dosages of PGs (25 mg/kg, 50 mg/kg, 100 mg/kg and 200 mg/kg), isolated from the bramble shark cartilage, in an animal model of OA. Indomethacin was used as a bioequivalent formulation. Primarily, the mass spectrum analysis of the purified PGs obtained from bramble shark cartilage revealed the presence of two unique peptides including AGWLSDGSVR and LDGNPINLSK, that showed sequence similarity with aggrecan core-protein and epiphycan, respectively. The levels of C-reactive protein and uric acid in the OA rats were reduced when treated with PGs. Histopathology analysis displayed less cartilage erosion and neovascularization in OA rats treated with PGs. The X-ray imaging presented higher bone density with 200 mg/kg dosage of PG treatment in OA rats. The expressions of the inflammatory modulators including TNF-α, IL-1β, MMP13, NOS2, IL-10 and COX-2 were found to be moderated with PG treatment. In addition, PG treatment maintained the activities of antioxidant enzymes, including SOD and catalase in the joint tissues with a higher GSH content, in a dose-dependent manner. Taken together, our preliminary findings report the anti-osteoarthritic properties of PGs and recommend to evaluate its efficacy and safety in randomized trials.
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Affiliation(s)
| | - Kalladath Venugopal Vishnu
- Biochemistry and Nutrition Division, ICAR-Central Institute of Fisheries Technology, Kochi, Kerala, India
| | - Raju Navaneethan
- Biochemistry and Nutrition Division, ICAR-Central Institute of Fisheries Technology, Kochi, Kerala, India
| | - Kumar Raj
- Peninsular and Marine Fish Genetic Resources Centre, ICAR-National Bureau of Fish Genetic Resources, CMFRI Campus, Kochi, Kerala, India
| | | | - Thangaraj Raja Swaminathan
- Peninsular and Marine Fish Genetic Resources Centre, ICAR-National Bureau of Fish Genetic Resources, CMFRI Campus, Kochi, Kerala, India
| | - Mathew Suseela
- Biochemistry and Nutrition Division, ICAR-Central Institute of Fisheries Technology, Kochi, Kerala, India
| | - Kurukkan Kunnath Asha
- Biochemistry and Nutrition Division, ICAR-Central Institute of Fisheries Technology, Kochi, Kerala, India.
| | - Gopinathan Pillai Sreekanth
- Siriraj Center of Research Excellence for Molecular Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
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