| Sains
          Malaysiana 50(5)(2021): 1393-1405
          
         http://doi.org/10.17576/jsm-2021-5005-18
              
           
             
           Anti-Tumor
            Activity of Metformin in Human Epidermal Growth Factor Receptor 2 Positive
            Breast Cancer Cells
            
           (Aktiviti
            Anti-Tumor Metformin pada Reseptor Faktor Pertumbuhan Epidermis Manusia 2
            Positif Sel Kanser Payudara)
              
           
             
           FATHUL HUDA1,2*, SARI
            EKAWATI3, ANINDY PUTRI ADDINA3, AHMAD FARIED2,4,
            AFIAT BERBUDI1,2, TAOFIK RUSDIANA5, TENNY PUTRI6,
            NURUL QOMARILLA6, LUKMAN HILFI7, IWAN SETIAWAN1 & MUHAMMAD HASAN BASHARI1,2
            
 
             
           1Department of Biomedical Science, Faculty of Medicine,
            Universitas Padjadjaran, Bandung 40161, Indonesia
            
           
             
           2Oncology and Stem Cell Working Group, Faculty of Medicine,
            Universitas Padjadjaran, Bandung 40161, Indonesia
            
           
             
           3Bachelor of Medicine Program, Faculty of Medicine,
            Universitas Padjadjaran, Bandung 40161, Indonesia
            
           
             
           4Department of Neurosurgery, Faculty of Medicine, Universitas
            Padjadjaran, Bandung 40161, Indonesia
            
           
             
           5Department of Pharmaceutics and Pharmaceutical Technology,
            Faculty of Pharmacy, Universitas Padjadjaran, Bandung 40161, Indonesia
            
           
             
           6Cell Culture Laboratory, Faculty of Medicine, Universitas
            Padjadjaran, Bandung 40161, Indonesia
            
           
             
           7Department of Public Health, Faculty of Medicine,
            Universitas Padjadjaran, Bandung 40161, Indonesia
            
           
             
           Diserahkan: 18 Disember 2019/Diterima: 29 September 2020
            
           
             
           ABSTRACT
            
           Breast Cancer (BC) is the leading cause of cancer death in
            women. One BC subtype is very aggressive with amplification of human epidermal
            growth factor receptor 2 (HER2) protein. Although specific HER2+ targeting
            agents are available, most of HER2+ BC patients develop resistant to these
            agents. Recent studies show that metformin, is able to become anti-tumor in
            various cancer cells. This research aims to evaluate anti-tumor activities of
            metformin to HER2+ BC cells in both sensitive and resistant to trastuzumab. A series of assays were performed to
            evaluate metformin anti-tumor activities in HCC-1954 and SKBR-3 HER2+ BC cells.
            MTT assay was performed to evaluate cell death, and inhibitory concentration
            (IC50), while scratch assay was performed to assess inhibition of
            cell migration and clonogenic assay to assess cell proliferation. p<0.05 was
            considered to be significant. Metformin could suppress the number of HER2+ BC
            cells. Viability assay showed suppression of viable cells after metformin
            incubation of 60 and 600 µM compared to control, 30 and 90%, respectively.
            Surprisingly, IC50 of metformin was smaller in HER2+ BC HCC-1954
            cells that resistant to trastuzumab compare to the sensitive one (SKBR-3). Both
            were below 1 µM, with R2 more than 0.95. Additionally, clonogenic
            assay showed less colony number and colony area with at least p < 0.05 in
            colony number and p < 0.01 in the area. In addition, metformin inhibited
            cell migration of HER2+ BC cells. Metformin
            shows a potency as anti-tumor by inducing cell death, inhibiting cell
            proliferation and cell migration of HER2+ BC cells.
  
           
             
           Keywords: Breast Cancer; HER2+; metformin; Trastuzumab
            resistant
            
           
             
           ABSTRAK
            
           Kanser Payudara (BC) adalah penyebab utama kematian akibat
            barah pada wanita. Satu subjenis BC sangat agresif dengan penguatan protein
            reseptor 2 faktor pertumbuhan epidermis manusia (HER2). Walaupun agen sasaran
            HER2 + khusus ada, kebanyakan pesakit HER2 + BC mengalami ketahanan terhadap
            agen ini. Kajian terbaru menunjukkan bahawa metformin mampu menjadi anti-tumor
            pada pelbagai sel barah. Penyelidikan ini bertujuan untuk menilai aktiviti
            anti-tumor metformin kepada sel HER2 + BC dengan sensitif dan tahan terhadap
            trastuzumab. Satu siri ujian dilakukan untuk menilai aktiviti anti-tumor
            metformin pada sel HCC-1954 dan SKBR-3 HER2 + BC. Ujian MTT dilakukan untuk
            menilai kematian sel dan kepekatan penghambatan (IC50), sementara
            ujian awal dilakukan untuk menilai penghambatan penghijrahan sel dan pengujian
            klonogenik untuk menilai percambahan sel. p <0.05 dianggap signifikan.
            Metformin dapat menekan bilangan sel HER2 + BC. Ujian daya maju menunjukkan
            penekanan sel yang berdaya maju setelah inkubasi metformin 60 dan 600 µM
            berbanding kawalan, masing-masing 30 dan 90%. Anehnya, IC50 metformin lebih
            kecil pada sel HER2 + BC HCC-1954 yang tahan terhadap trastuzumab dibandingkan
            dengan sel sensitif (SKBR-3). Kedua-duanya berada di bawah 1 µM, dengan R2
            lebih daripada 0.95. Selain itu, ujian klonogenik menunjukkan bilangan koloni
            dan kawasan koloni yang kurang dengan sekurang-kurangnya p <0.05 pada
            bilangan koloni dan p < 0.01 di kawasan koloni. Sebagai tambahan, metformin
            menghalang penghijrahan sel HER2 + BC sel. Metformin menunjukkan potensi
            sebagai anti-tumor dengan mendorong kematian sel, menghambat percambahan sel dan
            penghijrahan sel HER2+ sel BC.
  
           
             
           Kata kunci: HER2 +; kanser payudara (BC); metformin,
            rintangan Trastuzumab
            
           
             
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           *Pengarang untuk surat-menyurat; email: fathul@unpad.ac.id
            
           
             
            
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