Homeopathy
DOI: 10.1055/s-0040-1718744
Original Research Article

Homeopathic Rhus toxicodendron Induces Cell Adhesions in the Mouse Pre-osteoblast Cell Line MC3T3-e1

Young Soo Oh*
1  Cell Logistics and Silver Health Research Center, School of Life Sciences, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
,
Soo Chul Chae*
2  Department Integrative Medical Sciences, Nambu University, Gwangju, Republic of Korea
,
Hwan Kim
3  GIST Central Research Facilities, Bio Imaging Laboratory, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
,
Hun Ji Yang
4  Department of Convergence Medicine, Asan Institute for Life Sciences, University of Ulsan College of Medicine, Asan Medical Center, Songpa-gu, Seoul, Republic of Korea
,
Kyung Jin Lee
4  Department of Convergence Medicine, Asan Institute for Life Sciences, University of Ulsan College of Medicine, Asan Medical Center, Songpa-gu, Seoul, Republic of Korea
,
2  Department Integrative Medical Sciences, Nambu University, Gwangju, Republic of Korea
› Author Affiliations

Abstract

BackgroundRhus toxicodendron (R. tox) has been used as a homeopathic remedy for the treatment of inflammatory conditions. Previously, we reported that R. tox modulated inflammation in the mouse chondrocyte and pre-osteoblastic MC3T3-e1 cell line. During the inflammatory process, cells adhere to the extracellular matrix (ECM) and then migrate to the inflammation site. We examine here the process of cell adhesion in MC3T3-e1 cells after their stimulation with homeopathic R. tox.

Methods For the cell–substrate adhesion assay, the cultured MC3T3-e1 cells were trypsinized, starved for 1 h in serum-free media, and plated onto culture plates coated with fibronectin (FN), 30c R. tox or gelatin, respectively. The cells were allowed to adhere for 20 min incubation and unattached cells were washed out. Adherent cells were measured using the water-soluble tetrazolium salt-8 assay. The intracellular signals after stimulation of R. tox were examined by analyzing the tyrosine phosphorylation of focal adhesion kinase (FAK), Src kinase, and Paxillin using immunoblot assay. Formation of focal adhesion (FA, an integrin-containing multi-protein structure that forms between intracellular actin bundles and the ECM) was analyzed by immunocytochemistry using NIH ImageJ software.

Results Cell adhesion increased after stimulation with R. tox (FN, 20.50%; R. tox, 44.80%; and gelatin, 17.11% vs. uncoated cells [control]). Tyrosine phosphorylation of FAK, Paxillin, and Src increased compared with that of gelatin when stimulated with R. tox. Additionally, R. tox-stimulated cells formed many FAs (number of FAs per cell, 35.82 ± 7.68) compared with gelatin-stimulated cells (number of FAs per cell, 19.80 ± 7.18) and exhibited extensive formation of actin stress fibers anchored by FAs formed at the cell periphery.

Conclusion Homeopathic R. tox promotes the formation of cell adhesions in vitro.

Highlights

• Mouse pre-osteoblastic MC3T3-e1 cells were stimulated with a 30c homeopathic formulation of Rhus toxicodendron (R. tox) to examine cell adhesion processes.


• When the MC3T3-e1 cells are stimulated with R. tox, cell adhesions are increased compared with fibronectin or gelatin-stimulation (cell adhesions; R. tox: 44.80%, fibronectin: 20.50%, and gelatin: 17.11% vs. unstimulated cells).


• After cell adhesion, MC3T3-e1 cells transduced tyrosine phosphorylation of focal adhesion complexes such as FAK, Src and Paxillin, and promoted focal adhesion formation.


• Homeopathic R. tox participates in cell adhesion, thus transducing intracellular signaling.


* These authors contributed equally to this work.




Publication History

Received: 15 April 2020

Accepted: 03 August 2020

Publication Date:
20 January 2021 (online)

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