The Fractal Dimension of Nuclear Chromatin as a Prognostic Factor in Acute Precursor B Lymphoblastic Leukemia
The fractal nature of the DNA arrangement has been postulated to be a common feature of all cell nuclei. We investigated the prognostic importance of the fractal dimension (FD) of chromatin in blasts of patients with acute precursor B lymphoblastic leukemia (B-ALL). In 28 patients, gray scale transf...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2006-01-01
|
| Series: | Cellular Oncology |
| Online Access: | http://dx.doi.org/10.1155/2006/409593 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832556237627064320 |
|---|---|
| author | Randall L. Adam Rosana C. Silva Fernanda G. Pereira Neucimar J. Leite Irene Lorand-Metze Konradin Metze |
| author_facet | Randall L. Adam Rosana C. Silva Fernanda G. Pereira Neucimar J. Leite Irene Lorand-Metze Konradin Metze |
| author_sort | Randall L. Adam |
| collection | DOAJ |
| description | The fractal nature of the DNA arrangement has been postulated to be a common feature of all cell nuclei. We investigated the prognostic importance of the fractal dimension (FD) of chromatin in blasts of patients with acute precursor B lymphoblastic leukemia (B-ALL). In 28 patients, gray scale transformed pseudo-3D images of 100 nuclei (May–Grünwald–Giemsa stained bone marrow smears) were analyzed. FD was determined by the Minkowski–Bouligand method extended to three dimensions. Goodness-of-fit of FD was estimated by the R2 values in the log-log plots. Whereas FD presented no prognostic relevance, patients with higher R2 values showed a prolonged survival. White blood cell count (WBC), age and mean fluorescence intensity of CD45 (MFICD45) were all unfavorable prognostic factors in univariate analyses. In a multivariate Cox-regression, R2, WBC, and MFICD45, entered the final model, which showed to be stable in a bootstrap resampling study. Blasts with lower R2 values, equivalent to accentuated “coarseness” of the chromatin pattern, which may reflect profound changes of the DNA methylation, indicated a poor prognosis. In conclusion the goodness-of-fit of the Minkowski–Bouligand dimension of chromatin can be regarded as a new and biologically relevant prognostic factor for patients with B-ALL. |
| format | Article |
| id | doaj-art-f8cb2d2407124abc874e149aa330f262 |
| institution | Kabale University |
| issn | 1570-5870 1875-8606 |
| language | English |
| publishDate | 2006-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Cellular Oncology |
| spelling | doaj-art-f8cb2d2407124abc874e149aa330f2622025-02-03T05:46:08ZengWileyCellular Oncology1570-58701875-86062006-01-01281-2555910.1155/2006/409593The Fractal Dimension of Nuclear Chromatin as a Prognostic Factor in Acute Precursor B Lymphoblastic LeukemiaRandall L. Adam0Rosana C. Silva1Fernanda G. Pereira2Neucimar J. Leite3Irene Lorand-Metze4Konradin Metze5Department of Pathology, Faculty of Medicine, State University of Campinas, BrazilDepartment of Clinical Medicine, Faculty of Medicine, State University of Campinas, BrazilDepartment of Clinical Medicine, Faculty of Medicine, State University of Campinas, BrazilInstitute of Computing, State University of Campinas, BR 13081-970 Campinas - SP, BrazilDepartment of Clinical Medicine, Faculty of Medicine, State University of Campinas, BrazilDepartment of Pathology, Faculty of Medicine, State University of Campinas, BrazilThe fractal nature of the DNA arrangement has been postulated to be a common feature of all cell nuclei. We investigated the prognostic importance of the fractal dimension (FD) of chromatin in blasts of patients with acute precursor B lymphoblastic leukemia (B-ALL). In 28 patients, gray scale transformed pseudo-3D images of 100 nuclei (May–Grünwald–Giemsa stained bone marrow smears) were analyzed. FD was determined by the Minkowski–Bouligand method extended to three dimensions. Goodness-of-fit of FD was estimated by the R2 values in the log-log plots. Whereas FD presented no prognostic relevance, patients with higher R2 values showed a prolonged survival. White blood cell count (WBC), age and mean fluorescence intensity of CD45 (MFICD45) were all unfavorable prognostic factors in univariate analyses. In a multivariate Cox-regression, R2, WBC, and MFICD45, entered the final model, which showed to be stable in a bootstrap resampling study. Blasts with lower R2 values, equivalent to accentuated “coarseness” of the chromatin pattern, which may reflect profound changes of the DNA methylation, indicated a poor prognosis. In conclusion the goodness-of-fit of the Minkowski–Bouligand dimension of chromatin can be regarded as a new and biologically relevant prognostic factor for patients with B-ALL.http://dx.doi.org/10.1155/2006/409593 |
| spellingShingle | Randall L. Adam Rosana C. Silva Fernanda G. Pereira Neucimar J. Leite Irene Lorand-Metze Konradin Metze The Fractal Dimension of Nuclear Chromatin as a Prognostic Factor in Acute Precursor B Lymphoblastic Leukemia Cellular Oncology |
| title | The Fractal Dimension of Nuclear Chromatin as a Prognostic Factor in Acute Precursor B Lymphoblastic Leukemia |
| title_full | The Fractal Dimension of Nuclear Chromatin as a Prognostic Factor in Acute Precursor B Lymphoblastic Leukemia |
| title_fullStr | The Fractal Dimension of Nuclear Chromatin as a Prognostic Factor in Acute Precursor B Lymphoblastic Leukemia |
| title_full_unstemmed | The Fractal Dimension of Nuclear Chromatin as a Prognostic Factor in Acute Precursor B Lymphoblastic Leukemia |
| title_short | The Fractal Dimension of Nuclear Chromatin as a Prognostic Factor in Acute Precursor B Lymphoblastic Leukemia |
| title_sort | fractal dimension of nuclear chromatin as a prognostic factor in acute precursor b lymphoblastic leukemia |
| url | http://dx.doi.org/10.1155/2006/409593 |
| work_keys_str_mv | AT randallladam thefractaldimensionofnuclearchromatinasaprognosticfactorinacuteprecursorblymphoblasticleukemia AT rosanacsilva thefractaldimensionofnuclearchromatinasaprognosticfactorinacuteprecursorblymphoblasticleukemia AT fernandagpereira thefractaldimensionofnuclearchromatinasaprognosticfactorinacuteprecursorblymphoblasticleukemia AT neucimarjleite thefractaldimensionofnuclearchromatinasaprognosticfactorinacuteprecursorblymphoblasticleukemia AT irenelorandmetze thefractaldimensionofnuclearchromatinasaprognosticfactorinacuteprecursorblymphoblasticleukemia AT konradinmetze thefractaldimensionofnuclearchromatinasaprognosticfactorinacuteprecursorblymphoblasticleukemia AT randallladam fractaldimensionofnuclearchromatinasaprognosticfactorinacuteprecursorblymphoblasticleukemia AT rosanacsilva fractaldimensionofnuclearchromatinasaprognosticfactorinacuteprecursorblymphoblasticleukemia AT fernandagpereira fractaldimensionofnuclearchromatinasaprognosticfactorinacuteprecursorblymphoblasticleukemia AT neucimarjleite fractaldimensionofnuclearchromatinasaprognosticfactorinacuteprecursorblymphoblasticleukemia AT irenelorandmetze fractaldimensionofnuclearchromatinasaprognosticfactorinacuteprecursorblymphoblasticleukemia AT konradinmetze fractaldimensionofnuclearchromatinasaprognosticfactorinacuteprecursorblymphoblasticleukemia |