| Id |
Subject |
Object |
Predicate |
Lexical cue |
| TextSentencer_T1 |
0-122 |
Sentence |
denotes |
c-kit is expressed in soft tissue sarcoma of neuroectodermic origin and its ligand prevents apoptosis of neoplastic cells. |
| TextSentencer_T2 |
123-288 |
Sentence |
denotes |
During development, mice with mutations of stem cell factor (SCF) or its receptor c-kit exhibit defects in melanogenesis, as well as hematopoiesis and gonadogenesis. |
| TextSentencer_T3 |
289-444 |
Sentence |
denotes |
Consequently, accumulating evidence suggests that the c-kit/SCF system plays a crucial role in all of these processes and in tumors which derive from them. |
| TextSentencer_T4 |
445-760 |
Sentence |
denotes |
Especially in neuroblastoma (infant tumors of neuroectoderm crest derivation such as melanocytes) it would appear that an autocrine loop exists between c-kit and SCF, and that the functional block of the c-kit receptors with monoclonal antibodies (MoAbs) results in a significant decrease in cellular proliferation. |
| TextSentencer_T5 |
761-952 |
Sentence |
denotes |
We studied the expression and role of c-kit and SCF in cell lines of soft tissue sarcoma of neuroectodermic origin, such as Ewing's sarcoma (ES) and peripheral neuro-ectodermal tumors (PNET). |
| TextSentencer_T6 |
953-1065 |
Sentence |
denotes |
Using flow cytometry with MoAb CD117 PE, c-kit expression was highlighted in all six of the cell lines examined. |
| TextSentencer_T7 |
1066-1258 |
Sentence |
denotes |
This receptor was specifically and functionally activated by SCF, as shown by the binding experiments and the intracellular phosphotyrosine and immunoprecipitation studies that were performed. |
| TextSentencer_T8 |
1259-1380 |
Sentence |
denotes |
Using reverse transcriptase polymerase chain reaction analysis, five of the six cellular lines expressed the mRNA of SCF. |
| TextSentencer_T9 |
1381-1576 |
Sentence |
denotes |
In the medium measured by using an enzyme- linked immunosorbent assay, low concentrations of SCF were found: only the TC32 cellular line produced significantly higher levels (32 pg) than control. |
| TextSentencer_T10 |
1577-1715 |
Sentence |
denotes |
In serum-free culture the addition of SCF reduced the percentage of apoptotic cells from 25% to 90% in five out of the six cellular lines. |
| TextSentencer_T11 |
1716-2219 |
Sentence |
denotes |
This observation was confirmed by (1) the functional block of c-kit with MoAb: after 7 days of culture more than 30% of the cells were apoptotic (range 31.5% to 100%) in five out of six cell lines and there was also a decrease in the percentage of cells in phase S, and (2) c-kit antisense oligonucleotides: in the cellular lines treated with oligonucleotides (in relation to the untreated lines) there was a notable reduction (P < .001) both in the absolute number of cells and the 3H-thymidine uptake. |
| TextSentencer_T12 |
2220-2365 |
Sentence |
denotes |
These results indicate that ES and PNET express c-kit and its ligand SCF and that SCF is capable of protecting the tumor cells against apoptosis. |
| TextSentencer_T13 |
2366-2551 |
Sentence |
denotes |
Furthermore, the reverse transcriptase-polymerase chain reaction performed on the biopsies revealed the presence of mRNA both of SCF and c-kit in practically all of the samples studied. |
| TextSentencer_T14 |
2552-2643 |
Sentence |
denotes |
Our in vitro data lead us to assume that SCF may also inhibit tumor cell apoptosis in vivo. |
| T1 |
0-122 |
Sentence |
denotes |
c-kit is expressed in soft tissue sarcoma of neuroectodermic origin and its ligand prevents apoptosis of neoplastic cells. |
| T2 |
123-288 |
Sentence |
denotes |
During development, mice with mutations of stem cell factor (SCF) or its receptor c-kit exhibit defects in melanogenesis, as well as hematopoiesis and gonadogenesis. |
| T3 |
289-444 |
Sentence |
denotes |
Consequently, accumulating evidence suggests that the c-kit/SCF system plays a crucial role in all of these processes and in tumors which derive from them. |
| T4 |
445-760 |
Sentence |
denotes |
Especially in neuroblastoma (infant tumors of neuroectoderm crest derivation such as melanocytes) it would appear that an autocrine loop exists between c-kit and SCF, and that the functional block of the c-kit receptors with monoclonal antibodies (MoAbs) results in a significant decrease in cellular proliferation. |
| T5 |
761-952 |
Sentence |
denotes |
We studied the expression and role of c-kit and SCF in cell lines of soft tissue sarcoma of neuroectodermic origin, such as Ewing's sarcoma (ES) and peripheral neuro-ectodermal tumors (PNET). |
| T6 |
953-1065 |
Sentence |
denotes |
Using flow cytometry with MoAb CD117 PE, c-kit expression was highlighted in all six of the cell lines examined. |
| T7 |
1066-1258 |
Sentence |
denotes |
This receptor was specifically and functionally activated by SCF, as shown by the binding experiments and the intracellular phosphotyrosine and immunoprecipitation studies that were performed. |
| T8 |
1259-1380 |
Sentence |
denotes |
Using reverse transcriptase polymerase chain reaction analysis, five of the six cellular lines expressed the mRNA of SCF. |
| T9 |
1381-1576 |
Sentence |
denotes |
In the medium measured by using an enzyme- linked immunosorbent assay, low concentrations of SCF were found: only the TC32 cellular line produced significantly higher levels (32 pg) than control. |
| T10 |
1577-1715 |
Sentence |
denotes |
In serum-free culture the addition of SCF reduced the percentage of apoptotic cells from 25% to 90% in five out of the six cellular lines. |
| T11 |
1716-2219 |
Sentence |
denotes |
This observation was confirmed by (1) the functional block of c-kit with MoAb: after 7 days of culture more than 30% of the cells were apoptotic (range 31.5% to 100%) in five out of six cell lines and there was also a decrease in the percentage of cells in phase S, and (2) c-kit antisense oligonucleotides: in the cellular lines treated with oligonucleotides (in relation to the untreated lines) there was a notable reduction (P < .001) both in the absolute number of cells and the 3H-thymidine uptake. |
| T12 |
2220-2365 |
Sentence |
denotes |
These results indicate that ES and PNET express c-kit and its ligand SCF and that SCF is capable of protecting the tumor cells against apoptosis. |
| T13 |
2366-2551 |
Sentence |
denotes |
Furthermore, the reverse transcriptase-polymerase chain reaction performed on the biopsies revealed the presence of mRNA both of SCF and c-kit in practically all of the samples studied. |
| T14 |
2552-2643 |
Sentence |
denotes |
Our in vitro data lead us to assume that SCF may also inhibit tumor cell apoptosis in vivo. |