PMID- 29142434 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220310 IS - 0973-1296 (Print) IS - 0976-4062 (Electronic) IS - 0973-1296 (Linking) VI - 13 IP - Suppl 3 DP - 2017 Oct TI - Melastoma malabathricum Ethyl Acetate Fraction Induces Secondary Necrosis in Human Breast and Lung Cancer Cell Lines. PG - S688-S692 LID - 10.4103/pm.pm_465_15 [doi] AB - BACKGROUND: Melastoma malabathricum (MM) is a traditional plant used in the Borneo region. The cytotoxic effects of methanol extracts from MM leaves have been reported in a number of human cancer cell lines. However, the mode of cell death by MM has not been investigated. OBJECTIVE: We investigated the cytotoxic effects of MM in both human breast and lung cancer cell lines, MCF-7 and A549, respectively, and defined the mode of cell death. MATERIALS AND METHODS: Cell viability was measured using the 3-(4-, 5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay. Annexin-V/propidium iodide (PI) and terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) staining was done to determine the mode of cell death. RESULTS: The MTT assay revealed that MM extract had an IC50 of >400 mug/ml on both cell lines at 24 h posttreatment. Flow cytometric and fluorescence microscopy analysis of Annexin-V/PI stained MM-treated cells revealed that the majority of the cells underwent secondary necrosis/late apoptosis. TUNEL assay showed that little to no DNA nicks were present in MM-treated cells, suggesting that cells have undergone secondary necrosis, not late apoptosis, at that time point. CONCLUSION: MCF-7 and A549 cells undergoes secondary necrosis 24 h post-treatment with MM extract. MM leaf extract could be a potential source for a novel anti-tumor agent for cancer therapy. SUMMARY: Melastoma malabathricum (MM) extract was toxic on human breast and lung cancer cell linesMajority of MM-treated cells died by either secondary necrosis or late apoptosis at 24 h post-treatmentTerminal deoxynucleotidyl transferase dUTP nick-end labeling assay confirmed that MM-treated cells underwent secondary necrosis, not late apoptosis. Abbreviations used: DMSO: Dimethyl sulfoxide; MM: Melastoma malabathricum; MTT: 3-(4-, 5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide; PI: Propidium iodide; TUNEL: Terminal deoxynucleotidyl transferase dUTP nick-end labeling. FAU - Idris, Adi AU - Idris A AD - PAP Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti, Gadong, Brunei Darussalam. FAU - Zulkipli, Ihsan N AU - Zulkipli IN AD - PAP Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti, Gadong, Brunei Darussalam. FAU - Zulhilmi, Nurul Ramizah AU - Zulhilmi NR AD - PAP Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti, Gadong, Brunei Darussalam. FAU - Lee, Huan F AU - Lee HF AD - PAP Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti, Gadong, Brunei Darussalam. FAU - Rajabalaya, Rajan AU - Rajabalaya R AD - PAP Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti, Gadong, Brunei Darussalam. FAU - Chee, Lim Y AU - Chee LY AD - PAP Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti, Gadong, Brunei Darussalam. FAU - Majid, Mohamed AU - Majid M AD - Faculty of Sciences, Universiti, Gadong, Brunei Darussalam. FAU - David, Sheba R AU - David SR AD - PAP Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti, Gadong, Brunei Darussalam. LA - eng PT - Journal Article DEP - 20171011 PL - United States TA - Pharmacogn Mag JT - Pharmacognosy magazine JID - 101300403 PMC - PMC5669117 OTO - NOTNLM OT - Apoptosis OT - Melastoma malabathricum OT - cancer OT - cytotoxic OT - flow cytometry OT - necrosis COIS- There are no conflicts of interest. EDAT- 2017/11/17 06:00 MHDA- 2017/11/17 06:01 PMCR- 2017/10/01 CRDT- 2017/11/17 06:00 PHST- 2015/10/28 00:00 [received] PHST- 2016/01/21 00:00 [revised] PHST- 2017/11/17 06:00 [entrez] PHST- 2017/11/17 06:00 [pubmed] PHST- 2017/11/17 06:01 [medline] PHST- 2017/10/01 00:00 [pmc-release] AID - PM-13-688 [pii] AID - 10.4103/pm.pm_465_15 [doi] PST - ppublish SO - Pharmacogn Mag. 2017 Oct;13(Suppl 3):S688-S692. doi: 10.4103/pm.pm_465_15. Epub 2017 Oct 11.