**Background**
Colon cancer remains one of the most prevalent and lethal malignancies worldwide, characterized by uncontrolled cell proliferation and resistance to apoptosis. The Janus kinase (JAK) signaling pathway plays a critical role in regulating cell growth, survival, and inflammation, and its overactivation is frequently observed in various cancers, making it a prime target for therapeutic intervention. Additionally, pulmonary fibrosis, often induced by toxins like bleomycin, involves complex inflammatory responses and oxidative stress that lead to permanent lung tissue scarring. Finding natural compounds that can modulate these pathways is essential for developing safer and more effective treatments. In this context, we will introduce a natural terpenoid with potent biological activities – Crocin.
**Definition**
Crocin (Crocin I) is an orally active natural product isolated from the stigma of Crocus sativus. It is a diterpenoid that exhibits significant anti-inflammatory, antioxidant, and antitumor activities.
**In Vitro and In Vivo Studies**
According to the Crocin description, this compound acts as a potent inhibitor of tumor cell proliferation. In vitro studies focusing on Crocin Cancer research demonstrated that Crocin (150, 200 μM; 24 h) exerts an antitumor role in HCT116 colon cancer cells by inhibiting the JAK pathway. Specifically, treatment with concentrations ranging from 0 to 450 μM weakened cell vitality in a concentration-dependent manner. Furthermore, Crocin (150, 200 μM; 24 h) facilitated apoptosis in HCT116 cells, reduced colony numbers, and downregulated the expression of Ki-67. Western blot analysis revealed that Crocin decreased the levels of p-JAK2, p-STAT3, and p-ERK, as well as their respective phosphorylation ratios (p-JAK2/JAK2, p-STAT3/STAT3, and p-ERK/ERK). Additionally, in RAW264.7 cells, Crocin showed an IC50 > 100 μM for the inhibition of nitric oxide production in lipopolysaccharide-activated cells.
Regarding Crocin in vivo activity, the compound was administered to rats with bleomycin-induced pulmonary fibrosis at a dose of 20 mg/kg orally for five consecutive weeks. The results showed significant antioxidant, anti-inflammatory, and antifibrotic effects, characterized by the reduced expression of TLR4, IL-10, TNF-α, and TGF-β1. Based on the Crocin technical information, these findings highlight the compound’s versatility in treating both neoplastic and fibrotic conditions. In conclusion, Crocin is a natural diterpenoid that inhibits the JAK pathway to suppress tumor growth and attenuates pulmonary inflammation and fibrosis.
Keywords
Crocin, 42553-65-1, Crocin I, Endogenous Metabolite, JAK, Apoptosis, Janus kinase, Anti-inflammatory, Antitumor, HCT116, Bleomycin, Inhibitor, inhibitor, inhibit
References
[1] Zaghloul MS, et al. Crocin attenuates lung inflammation and pulmonary vascular dysfunction in a rat model of bleomycin-induced pulmonary fibrosis. Life Sci. 2019 Aug 26:116794.
[2] Yang H, et al. Crocin exerts anti-tumor effect in colon cancer cells via repressing the JAK pathway. Eur J Histochem. 2023 Sep 12;67(3):3697.