Antibody FU-MFH-2 cells Original tumor cells click here in vitro in vivo Vimentin + + + + + + + + + EMA – - – AE1/AE3 – - – CAM 5.2 – - – Desmin – - – α-SMA – - – MSA – - – S-100 protein – - – NSE – - – CD68 + + + + + + + Lysozyme – - + AAT – - – ACT – - – C-Kit – - – Abbreviations: EMA, epithelial membrane antigen; α-SMA, alpha-smooth muscle actin; MSA, muscle-specific actin; NSE, neuron-specific enolase; AAT, alpha-1-antitrypsin; ACT, alpha-1-antichymotrypsin. + + +, > 75% positive cells; + +, 15-75% positive cells; +, < 15% positive cells, -, negative reaction. Figure 3 Light microscopic finding of FU-MFH-2 cells in vivo. A representative
portion of the tumor in a SCID mouse, essentially resembling the original tumor. Cytogenetic findings A representative karyotype is shown in Figure 4. FU-MFH-2 displayed a highly complex karyotype with numerous marker chromosomes. The composite karyotype was as follows: 55-61,XY,-X,add(X)(p22.1),add(1)(q11),der(1)add(1)(p13)del(1)(q42),-2,-2,add(2)(p11.1), -3,add(3)(q21),-4,add(4)(q31.1),-5,add(5)(q11.1),del(6)(q11) × 2,del(7)(p11.1), del(7)(q11.1),der(7)add(7)(p22)add(7)(q22),-8,add(9)(p11) Belinostat clinical trial × 2, der(9)del(9)(p11)add(9)(q22),-10,add(10)(p13),-11,add(11)(q23),-12,-13,-14,add(14)(p11.1),add(15)(p11.1),add(15)(p11.1),-17,-17,-18,-19,-20,add(20)(q13.1),+add(21)(p11.1),-22,-22,
+mar1,+mar2,+mar3,+mar4,+mar5,+mar6,+mar7,+mar8,+mar9,+mar10,+mar11,+mar12 [cp20]. Precisely the same karyotype was recognized in the original tumor cells (data not shown). Figure 4 A representative G-banded karyotype of a metaphase FU-MFH-2 cell, including
12 marker chromosomes. Arrows indicate the structural chromosome aberrations. Molecular cytogenetic findings An M-FISH analysis identified 19 structural Epigenetics Compound Library cell assay rearrangements in the FU-MFH-2 cell (Figure 5). Chromosomes 3, 6, 8, 9, 10, and 16 were frequently involved in rearrangements. Figure 5 Multicolor FISH of FU-MFH-2 cell line. Aberrant chromosomes are displayed in classified color image. Urovysion™ FISH revealed homozygous deletions of the 9p21 locus containing the tumor suppressor Resminostat gene p16 INK4A in all analyzed metaphase and interphase cells (Figure 6). Figure 6 Multitarget FISH analysis performed on metaphase cells of FU-MFH-2 cell line with the Urovysion™ probe set reveals loss of gold signals indicating homozygous deletions of the 9p21 locus. Centromeric signals (arrows) of chromosomes 3 (red), 7 (green), and 17 (aqua) are shown. CGH analysis showed similar profiles in the original tumor and FU-MFH-2 cell line. A high-level amplification of 9q31-q34 was observed. Significant gains of DNA sequences were detected in the 1p12-p34.3, 2p21, 2q11.2-q21, 3p, 4p, 6q22-qter, 8p11.2, 8q11.2-q21.1, 9q21-qter, 11q13, 12q24, 15q21-qter, 16p13, 17, 20, and X regions. Significant losses of DNA sequences were detected in the 1q43-qter, 4q32-qter, 5q14-q23, 7q32-qter, 8p21-pter, 8q23, 9p21-pter, 10p11.