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Uehara T, Watanabe S, Yamaguchi S, Eguchi N, Sakamoto N, Oda Y, Arimura H, Kaku T, Ohishi Y, Mizuno S. Translocation of nuclear chromatin distribution to the periphery reflects dephosphorylated threonine-821/826 of the retinoblastoma protein (pRb) in T24 cells treated with Bacillus Calmette-Guérin. Cytotechnology 2023; 75:49-62. [PMID: 36713061 PMCID: PMC9880130 DOI: 10.1007/s10616-022-00559-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 11/10/2022] [Indexed: 11/21/2022] Open
Abstract
The standard treatment for non-muscle-invasive bladder cancer is intravesical Bacillus Calmette-Guérin (BCG) therapy, which is considered the only intravesical therapy that reduces the risk of progression to muscle-invasive cancer. BCG unresponsiveness, in which intravesical BCG therapy is ineffective, has become a problem. It is thus important to evaluate the effectiveness of BCG treatment for patients as soon as possible in order to identify the optimal therapy. Urine cytology is a noninvasive, easy, and cost-effective method that has been used during BCG treatment, but primarily only to determine benign or malignant status; findings concerning the efficacy of BCG treatment based on urine cytology have not been reported. We investigated the relationship between BCG exposure and nuclear an important criterion in urine cytology, i.e., nuclear chromatin patterns. We used three types of cultured cells to evaluate nuclear chromatin patterns and the cell cycle, and we used T24 cells to evaluate the phosphorylation of retinoblastoma protein (pRb) in six-times of BCG exposures. The results revealed that after the second BCG exposure, (i) nuclear chromatin is distributed predominantly at the nuclear periphery and (ii) the dephosphorylation of threonine-821/826 in pRb occurs. This is the first report of a dynamic change in the nuclear chromatin pattern induced by exposure to BCG. Molecular findings also suggested a relationship between this phenomenon and cell-cycle proteins. Although these results are preliminary, they contribute to our understanding of the cytomorphological changes that occur with BCG exposure.
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Affiliation(s)
- Toshitaka Uehara
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582 Japan
- Central Laboratory, Iizuka Hospital, 3-83 Yoshio-machi, Iizuka-shi, Fukuoka, 820-8505 Japan
| | - Sumiko Watanabe
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582 Japan
| | - Shota Yamaguchi
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582 Japan
| | - Natsuki Eguchi
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582 Japan
| | - Norie Sakamoto
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582 Japan
| | - Yoshinao Oda
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582 Japan
| | - Hidetaka Arimura
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582 Japan
| | - Tsunehisa Kaku
- Fukuoka International University of Health and Welfare, 3-6-40, Momochihama, Sawara-ku, Fukuoka, 814-0001 Japan
- Fukuoka Sanno Hospital, 3-6-45, Momochihama, Sawara-ku, Fukuoka, 814-0001 Japan
| | - Yoshihiro Ohishi
- Central Laboratory, Iizuka Hospital, 3-83 Yoshio-machi, Iizuka-shi, Fukuoka, 820-8505 Japan
- Department of Pathology, Iizuka Hospital, 3-83 Yoshio-machi, Iizuka-shi, Fukuoka, 820-8505 Japan
| | - Shinichi Mizuno
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582 Japan
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Lee H, Han M, Yoo T, Jung C, Son HJ, Cho M. Evaluation of nuclear chromatin using grayscale intensity and thresholded percentage area in liquid-based cervical cytology. Diagn Cytopathol 2018; 46:384-389. [DOI: 10.1002/dc.23906] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 01/18/2018] [Accepted: 01/31/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Hyekyung Lee
- Department of Pathology; Medical Center of Eulji University; Daejeon South Korea
| | - Myungein Han
- Bio-medical Engineering; University of Melbourne; Melbourne Australia
| | - Taejo Yoo
- Department of Pathology; Medical Center of Eulji University; Daejeon South Korea
| | - Chanho Jung
- Department of Electric Engineering; Hanbat National University; Daejeon South Korea
| | - Hyun-Jin Son
- Department of Pathology; Medical Center of Eulji University; Daejeon South Korea
| | - Migyung Cho
- School of Information and Communication; Tongmyong University; Tongmyong South Korea
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Komagata H, Ichimura T, Matsuta Y, Ishikawa M, Shinoda K, Kobayashi N, Sasaki A. Feature analysis of cell nuclear chromatin distribution in support of cervical cytology. J Med Imaging (Bellingham) 2017; 4:047501. [PMID: 29057290 PMCID: PMC5644512 DOI: 10.1117/1.jmi.4.4.047501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 09/26/2017] [Indexed: 11/20/2022] Open
Abstract
Cytology, a method of estimating cancer or cellular atypia from microscopic images of scraped specimens, is used according to the pathologist’s experience to diagnose cases based on the degree of structural changes and atypia. Several methods of cell feature quantification, including nuclear size, nuclear shape, cytoplasm size, and chromatin texture, have been studied. We focus on chromatin distribution in the cell nucleus and propose new feature values that indicate the chromatin complexity, spreading, and bias, including convex hull ratio on multiple binary images, intensity distribution from the gravity center, and tangential component intensity and texture biases. The characteristics and cellular classification accuracies of the proposed features were verified through experiments using cervical smear samples, for which clear nuclear morphologic diagnostic criteria are available. In this experiment, we also used a stepwise support vector machine to create a machine learning model and a cross-validation algorithm with which to derive identification accuracy. Our results demonstrate the effectiveness of our proposed feature values.
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Affiliation(s)
- Hideki Komagata
- Saitama Medical University, Faculty of Health and Medical Care, Saitama, Japan
| | - Takaya Ichimura
- Saitama Medical University, Department of Pathology, Saitama, Japan
| | | | - Masahiro Ishikawa
- Saitama Medical University, Faculty of Health and Medical Care, Saitama, Japan
| | - Kazuma Shinoda
- Utsunomiya University, Graduate School of Engineering, Tochigi, Japan
| | - Naoki Kobayashi
- Saitama Medical University, Faculty of Health and Medical Care, Saitama, Japan
| | - Atsushi Sasaki
- Saitama Medical University, Department of Pathology, Saitama, Japan
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Tang JR, Mat Isa NA, Ch’ng ES. A Fuzzy-C-Means-Clustering Approach: Quantifying Chromatin Pattern of Non-Neoplastic Cervical Squamous Cells. PLoS One 2015; 10:e0142830. [PMID: 26560331 PMCID: PMC4641582 DOI: 10.1371/journal.pone.0142830] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 10/27/2015] [Indexed: 11/19/2022] Open
Abstract
Despite the effectiveness of Pap-smear test in reducing the mortality rate due to cervical cancer, the criteria of the reporting standard of the Pap-smear test are mostly qualitative in nature. This study addresses the issue on how to define the criteria in a more quantitative and definite term. A negative Pap-smear test result, i.e. negative for intraepithelial lesion or malignancy (NILM), is qualitatively defined to have evenly distributed, finely granular chromatin in the nuclei of cervical squamous cells. To quantify this chromatin pattern, this study employed Fuzzy C-Means clustering as the segmentation technique, enabling different degrees of chromatin segmentation to be performed on sample images of non-neoplastic squamous cells. From the simulation results, a model representing the chromatin distribution of non-neoplastic cervical squamous cell is constructed with the following quantitative characteristics: at the best representative sensitivity level 4 based on statistical analysis and human experts' feedbacks, a nucleus of non-neoplastic squamous cell has an average of 67 chromatins with a total area of 10.827 μm2; the average distance between the nearest chromatin pair is 0.508 μm and the average eccentricity of the chromatin is 0.47.
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Affiliation(s)
- Jing Rui Tang
- Imaging and Intelligent System Research Team (ISRT), School of Electrical and Electronic Engineering, Universiti Sains Malaysia, Nibong Tebal, Pulau Pinang, Malaysia
| | - Nor Ashidi Mat Isa
- Imaging and Intelligent System Research Team (ISRT), School of Electrical and Electronic Engineering, Universiti Sains Malaysia, Nibong Tebal, Pulau Pinang, Malaysia
| | - Ewe Seng Ch’ng
- Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, Kepala Batas, Pulau Pinang, Malaysia
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