Anti-inflammatory Signaling Research on BPC-157 & TB-500 & GHK-Cu
All three peptides appear to play some potentially complementary and partially overlapping roles in inflammatory signaling inside and in between cells. Notably, all three appear to have a positive action on toning down inflammatory processes. For example, research conducted in laboratory settings by Santra et al. suggests that TB-500 may lower inflammation-related signaling inside cell cultures of developing brain support cells called oligodendrocyte progenitor cells.
Proposed Mechanism
After cell stress or injury, these cells are posited to activate innate immune pathways, especially Toll-like receptor (TLR) signaling, which may drive inflammatory responses inside the cell. The authors research whether TB-500 may tone down this signaling and suggest that the peptide may increase the level of miR-146a, a small regulatory RNA molecule whose role may be to act as an internal brake on inflammatory signaling pathways. When miR-146a levels rise, two key TLR signaling proteins, IRAK1 and TRAF6, may decrease, and thus they may not transmit inflammatory signals inside the cell, including pathways linked to NF-κB activation, which would otherwise play a major role in inflammatory signaling. Furthermore, research by Sikiric et al. suggests that BPC-157 may also interact with inflammatory signaling, specifically by attenuating inflammatory cell infiltration in research models. Apparently, the researchers observed lower levels of biochemical markers linked to inflammation, including markers of neutrophil accumulation, leukotriene B4, and thromboxane B2 in inflamed cellular cultures. This peptide also appeared to modulate immune cell behavior, with reports of increased macrophage activity, which may support resolution rather than persistence of inflammation. Importantly, these implications were observed without direct immunosuppression of specific cytokines such as TNF, implying a more regulatory mode of action.
Key Findings
BPC-157 may “ interact with the NO-system [nitric oxide system] , providing endothelium protection” , which may indirectly limit inflammatory amplification by preserving microvascular integrity. Last but not least, experiments by Park et al. suggest that GHK-Cu may also tone down inflammatory signaling in macrophages activated by pro-inflammatory triggers and in lung cell injury models. In activated macrophages, GHK-Cu apparently lowered intracellular reactive oxygen species and restored superoxide dismutase activity toward control values. The pro-inflammatory triggers apparently increased TNF-α and IL-6 release, while GHK-Cu apparently reduced both cytokines. Mechanistically, the authors suggest that GHK-Cu may have suppressed NF-κB activation by reducing the activation of key regulators. The researchers did not notice significant action on ERK1/2, JNK1/2, or NO secretion. In the lung cell cultures, the peptide complex apparently reduced edema, inflammatory cell infiltration, and overall histologic injury scores. The researchers also observed reductions in TNF-α, IL-6, total cell counts, neutrophils, MPO activity, and markers of alveolar permeability.
