Sturgeon Cartilage Yields Chromatography Finds

Osteoarthritis (OA) is a common and serious joint condition where the cartilage breaks down and inflammation sets in. Two natural substances, chondroitin sulfate and collagen peptides, are key building blocks of cartilage and may help fight the inflammation linked to OA. Sturgeon cartilage, which is normally just a waste byproduct from fish processing, turns out to be an untapped source of these substances. But so far, not much research has considered how to extract and study them, let alone how they might work together to calm inflammation in cartilage cells.

In a study conducted by the College of Food and Pharmacy of Zhejiang Ocean University (Zhoushan, People's Republic of China), the researchers pulled chondroitin sulfate and collagen peptides separately out of sturgeon cartilage. They isolated one purified form of chondroitin sulfate (called CS-1) using ion-exchange chromatography, and they produced a specific collagen peptide fraction (called CP-F3) by breaking down the cartilage with enzymes, then filtering and purifying it further using ultrafiltration and gel filtration chromatography. A paper based on this research was published in the International Journal of Biological Macromolecules.¹

What Is Osteoarthritis, and Why Is It Such a Significant Health Concern?

OA is a widespread, long-term joint condition that most often hits the hands, knees, hips, and spine.^2,3 It causes pain, stiffness, and trouble moving around, which can seriously affect someone's day-to-day life. Worldwide, more than 600 million people deal with OA, and older adults bear the brunt of it, which makes OA one of the leading causes of disability as people age. As the global population continues to get older, cases of OA are only expected to climb.^4,5

To date,” write the authors of the paper,¹ “no definitive cure exists for OA, with current therapeutic strategies focusing on symptomatic management.”

Lately, natural ingredients like chondroitin sulfate and collagen peptides, especially those derived from type II collagen, have been getting a lot of attention as health supplements, because they seem to help keep joint cartilage in good shape and may ease the inflammation that comes with osteoarthritis.^6-11

How Do CS-1 and CP-F3 Affect Inflamed Cartilage Cells When Used Together?

The researchers found that CS-1 turned out to be mostly a specific type of chondroitin sulfate (called chondroitin 4-sulfate) and was a fairly large molecule. CP-F3, on the other hand, was made up of small collagen fragments—tiny peptide pieces. The team then tested these two substances together in laboratory-grown cartilage cells that had been triggered into an inflamed state (mimicking what happens in osteoarthritis). When CS-1 and CP-F3 were used in combination, they helped the cells hold onto more of their important structural components (proteoglycan and type II collagen). They also cut down on several inflammation-related markers and helped rebalance the enzymes responsible for breaking down versus preserving cartilage. The researchers believe these benefits may be linked to how the combo affects a specific inflammation-signaling pathway in the cells (known as TLR4/MyD88/NF-κB).¹

“Overall,” write the authors of the paper,¹ “these findings provide preliminary in vitro evidence that CS-1 and CP-F3, particularly in combination, may attenuate inflammatory and matrix-degrading responses. Further in vivo and mechanistic studies are required to clarify their relevance to cartilage protection.”

References

1. Ji, C.; Niu, C.; Liu, Q. et al. Chondroitin Sulfate and Collagen Peptides Co-derived from Sturgeon Cartilage: Characterization and Combined Effects on IL-1β-induced Chondrocyte Inflammation in vitro. Int J Biol Macromol. 2026, 154169. DOI: 10.1016/j.ijbiomac.2026.154169
2. Motta, F.; Barone, E.; Sica, A. et al. Inflammaging and Osteoarthritis. Clin. Rev. Allergy Immunol.2023, 64, 222-238. DOI: 10.1007/s12016-022-08941-1
3. Nedunchezhiyan, U.; Varughese, I.; Sun, A. R. et al. Obesity, Inflammation, and Immune System in Osteoarthritis. Front Immunol. 2022, 13, 907750. DOI: 10.3389/fimmu.2022.907750
4. Abramoff, B.; Caldera, F. E. Osteoarthritis: Pathology, Diagnosis, and Treatment Options. Med Clin North Am. 2020, 104 (2), 293-311. DOI: 10.1016/j.mcna.2019.10.007
5. Bertrand, J.; Cromme, C.; Umlauf, D. et al. Molecular Mechanisms of Cartilage Remodelling in Osteoarthritis. Int J Biochem Cell Biol. 2010, 42 (10), 1594-601. DOI: 10.1016/j.biocel.2010.06.022
6. Lee, M. H.; Kim, H. M.; Chung, H. C. et al. Low-Molecular-Weight Collagen Peptide Ameliorates Osteoarthritis Progression through Promoting Extracellular Matrix Synthesis by Chondrocytes in a Rabbit Anterior Cruciate Ligament Transection Model. J Microbiol Biotechnol. 2021, 31 (10), 1401-1408. DOI: 10.4014/jmb.2108.08027
7. Persiani, S.; Rotini, R.; Trisolino, G. et al. Synovial and Plasma Glucosamine Concentrations in Osteoarthritic Patients Following Oral Crystalline Glucosamine Sulphate at Therapeutic Dose. Osteoarthritis Cartilage 2007, 15 (7), 764-772. DOI: 10.1016/j.joca.2007.01.019
8. Yuan, L.; Chu, Q.; Wu, X. et al. Anti-inflammatory and Antioxidant Activity of Peptides From Ethanol-Soluble Hydrolysates of Sturgeon (Acipenser schrenckii) Cartilage. Front Nutr. 2021, 8, 689648. DOI: 10.3389/fnut.2021.689648
9. Liao, W.; Guanghua, X.; Li, Y. et al. Comparison of Characteristics and Fibril-forming Ability of Skin Collagen from Barramundi (Lates calcarifer) and Tilapia (Oreochromis niloticus). Int J Biol Macromol. 2018, 107 (Pt A), 549-559. DOI: 10.1016/j.ijbiomac.2017.09.022
10. Nishimoto, S.; Takagi, M.; Wakitani, S. et al. Effect of Chondroitin Sulfate and Hyaluronic Acid on Gene Expression in a Three-dimensional Culture of Chondrocytes. J Biosci Bioeng. 2005, 100 (1), 123-126. DOI: 10.1263/jbb.100.123
11. Hsu, H. C.; Ke, Y. L.; Lai, Y. H. et al. Chondroitin Sulfate Enhances Proliferation and Migration via Inducing β-Catenin and Intracellular ROS as Well as Suppressing Metalloproteinases through Akt/NF-κB Pathway Inhibition in Human Chondrocytes. J Nutr Health Aging 2022, 26 (3), 307-313. DOI: 10.1007/s12603-022-1752-5