PMID- 33167431 OWN - NLM STAT- MEDLINE DCOM- 20210421 LR - 20210421 IS - 1420-3049 (Electronic) IS - 1420-3049 (Linking) VI - 25 IP - 21 DP - 2020 Nov 5 TI - Targeting TGF-beta-Mediated SMAD Signaling Pathway via Novel Recombinant Cytotoxin II: A Potent Protein from Naja naja oxiana Venom in Melanoma. LID - 10.3390/molecules25215148 [doi] LID - 5148 AB - Since the current treatments have not resulted in the desired outcomes for melanoma patients, there is a need to identify more effective medications. Together with other snake venom proteins, cytotoxin-II has shown promising results in tumoral cells. In this study, recombinant cytotoxin-II (rCTII) was expressed in SHuffle((R)) T7 Express cells, while the epitope mapping of rCTII was performed to reveal the antibody-binding regions of rCTII. The MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay was used to assess the viability of SK-MEL-3 and HFF-2 cells after treating these cells with rCTII. The qRT-PCR was performed to evaluate the expression levels of matrix metallopeptidase 3 (MMP-3), SMAD2, SMAD3, caspase-8, caspase-9, and miR-214 in order to reveal the rCTII-induced signaling pathways in melanoma. Our results have shown that two regions of amino acids, 6-16 and 19-44, as predicted epitopes of this toxin, are essential for understanding the toxicity of rCTII. Treating the melanoma cells with rCTII substantially inhibited the transforming growth factor-beta (TGF-beta)-SMAD signaling pathway and down-regulated the expression of MMP-3 and miR-214 as well. This cytotoxin also restored apoptosis mainly via the intrinsic pathway. The down-regulation of MMP-3 and miR-214 might be associated with the anti-metastatic property of rCTII in melanoma. The inhibitory effect of rCTII on the TGF-beta signaling pathway might be associated with increased apoptosis and decreased cancer cell proliferation. It is interesting to see that the IC50 value of rCTII has been lower in the melanoma cells than non-tumoral cells, which may indicate its potential effects as a drug. In conclusion, rCTII, as a novel medication, might serve as a potent and efficient anticancer drug in melanoma. FAU - Derakhshani, Afshin AU - Derakhshani A AUID- ORCID: 0000-0002-3243-233X AD - Immunology Research Center, Tabriz University of Medical Sciences, Tabriz 51656-65811, Iran. AD - IRCCS Istituto Tumori "Giovanni Paolo II" of Bari, 70124 Bari, Italy. FAU - Silvestris, Nicola AU - Silvestris N AUID- ORCID: 0000-0001-7814-7318 AD - IRCCS Istituto Tumori "Giovanni Paolo II" of Bari, 70124 Bari, Italy. AD - Department of Biomedical Sciences and Human Oncology (DIMO), University of Bari, 70124 Bari, Italy. FAU - Hemmat, Nima AU - Hemmat N AUID- ORCID: 0000-0001-6432-9647 AD - Immunology Research Center, Tabriz University of Medical Sciences, Tabriz 51656-65811, Iran. FAU - Asadzadeh, Zahra AU - Asadzadeh Z AD - Immunology Research Center, Tabriz University of Medical Sciences, Tabriz 51656-65811, Iran. FAU - Abdoli Shadbad, Mahdi AU - Abdoli Shadbad M AUID- ORCID: 0000-0003-4865-8779 AD - Immunology Research Center, Tabriz University of Medical Sciences, Tabriz 51656-65811, Iran. FAU - Nourbakhsh, Niloufar Sadat AU - Nourbakhsh NS AD - Department of Biology, Islamic Azad University, Varamin-Pishva Branch, Varamin, Tehran 33817-74895, Iran. FAU - Mobasheri, Leila AU - Mobasheri L AUID- ORCID: 0000-0003-3470-0278 AD - Department of Immunology, Faculty of Medicine, Birjand University of Medical Sciences, Birjand 97178-53577, Iran. FAU - Vahedi, Parviz AU - Vahedi P AD - Department of Anatomical Sciences, Maragheh University of Medical Sciences, Maragheh 51656-65931, Iran. FAU - Shahmirzaie, Morteza AU - Shahmirzaie M AD - Pharmaceutical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Niayesh Highway, Valiasr Ave, Tehran 19919-53381, Iran. FAU - Brunetti, Oronzo AU - Brunetti O AUID- ORCID: 0000-0002-7014-6828 AD - IRCCS Istituto Tumori "Giovanni Paolo II" of Bari, 70124 Bari, Italy. FAU - Safarpour, Hossein AU - Safarpour H AUID- ORCID: 0000-0001-9883-9186 AD - Cellular & Molecular Research Center, Birjand University of Medical Sciences, Birjand 97178-53577, Iran. FAU - Baradaran, Behzad AU - Baradaran B AUID- ORCID: 0000-0002-8642-6795 AD - Immunology Research Center, Tabriz University of Medical Sciences, Tabriz 51656-65811, Iran. AD - Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz 51666-14766, Iran. LA - eng PT - Journal Article DEP - 20201105 PL - Switzerland TA - Molecules JT - Molecules (Basel, Switzerland) JID - 100964009 RN - 0 (Cytotoxins) RN - 0 (Epitopes) RN - 0 (Immunoglobulin G) RN - 0 (MIRN214 microRNA, human) RN - 0 (MicroRNAs) RN - 0 (Recombinant Proteins) RN - 0 (SMAD2 protein, human) RN - 0 (SMAD3 protein, human) RN - 0 (Smad2 Protein) RN - 0 (Smad3 Protein) RN - 0 (Snake Venoms) RN - 0 (TGFB1 protein, human) RN - 0 (Transforming Growth Factor beta1) SB - IM MH - Animals MH - Apoptosis MH - Cell Proliferation MH - Cell Survival MH - Cytotoxins/*chemistry MH - Epitope Mapping MH - Epitopes/chemistry MH - Gene Expression Regulation, Neoplastic/drug effects MH - Humans MH - Immunoglobulin G/chemistry MH - Inhibitory Concentration 50 MH - Melanoma/*drug therapy MH - MicroRNAs/metabolism MH - Naja naja MH - Neoplasm Metastasis MH - Recombinant Proteins/chemistry MH - Signal Transduction MH - Skin Neoplasms/*drug therapy MH - Smad2 Protein/*metabolism MH - Smad3 Protein/metabolism MH - Snake Venoms/*chemistry MH - Transforming Growth Factor beta1/*metabolism PMC - PMC7663949 OTO - NOTNLM OT - TGF-beta pathway OT - apoptosis OT - melanoma OT - recombinant cytotoxin-II OT - snake venom COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2020/11/11 06:00 MHDA- 2021/04/22 06:00 PMCR- 2020/11/05 CRDT- 2020/11/10 01:05 PHST- 2020/10/15 00:00 [received] PHST- 2020/10/29 00:00 [revised] PHST- 2020/11/02 00:00 [accepted] PHST- 2020/11/10 01:05 [entrez] PHST- 2020/11/11 06:00 [pubmed] PHST- 2021/04/22 06:00 [medline] PHST- 2020/11/05 00:00 [pmc-release] AID - molecules25215148 [pii] AID - molecules-25-05148 [pii] AID - 10.3390/molecules25215148 [doi] PST - epublish SO - Molecules. 2020 Nov 5;25(21):5148. doi: 10.3390/molecules25215148.