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Jena SK, Dolui M, Ghoshal S, Sarkar S. Demographic and socio-economic correlates of knowledge of the ovulatory cycle among tribal women in India: Evidence from the nationally representative survey (NFHS-5). BMC Public Health 2024; 24:766. [PMID: 38475774 DOI: 10.1186/s12889-024-18296-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 03/06/2024] [Indexed: 03/14/2024] Open
Abstract
BACKGROUND The knowledge of ovulatory cycle (KOC) is the basis for natural family planning methods. The absence of knowledge is a notable issue since the ovulatory cycle plays a crucial role in reproductive health and empowers women to make informed decisions that influence their lives. This study examines the knowledge of the ovulatory cycle among reproductive tribal women in India and its demographic and socio-economic determinants. METHODS The data were derived from the National Family Health Survey conducted in 2019-2021. The effective sample size for the present study was 1,01,914 tribal women aged 15-49 years in India. Descriptive statistics along with bivariate analysis were conducted to find the preliminary results. Additionally, multivariable binary logistic regressions were conducted to determine the likelihood of KOC among tribal women across different characteristics. We conducted statistical analysis in STATA 17.0 (StataCorp) and used ArcGIS 10.8.2 for spatial mapping. RESULTS Out of 1,01,914 tribal women, 78.8 per cent lack correct knowledge of the ovulatory cycle. Notably, Education level significantly influences KOC, with secondary education showing higher odds of KOC (AOR: 1.24, 95% CI:1.006-1.528) compared to no education. Christian women exhibit lower odds of having KOC (AOR: 0.749, 95% CI:0.564-0.996) compared to Hindu women. Husband/partner's education level shows a strong association, with higher-educated partners correlating with higher odds of KOC (AOR: 2.501, 95% CI: 1.807-3.461) for higher education. Knowledge of any contraceptive method and current contraceptive use type are strongly associated with KOC. Additionally, rural residence negatively influences KOC (AOR: 1.545, 95% CI: 1.236-1.932), while exposure to mass media has a positive effect (AOR: 1.152, 95% CI: 0.975-1.362) albeit modest. CONCLUSION The study highlights the need for targeted educational and awareness programs to improve KOC among tribal women in India. By addressing factors such as education, religious influences, and place of residence, we can empower these women to make informed decisions about their reproductive health, ultimately enhancing their overall well-being and quality of life. This knowledge is not only a foundation for natural family planning but also a key driver of women's agency and autonomy in shaping their lives.
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Affiliation(s)
- Sameer Kumar Jena
- Department of Population Studies, Fakir Mohan University, Balesore, Odisha, 756089, India
| | - Mriganka Dolui
- Department of Geography, Central University of Karnataka, Kalaburagi, Karnataka, 585311, India.
| | - Sucharita Ghoshal
- Department of Agriculture, Rural and Tribal Development, Ramakrishna Mission Vivekananda Educational and Research Institute, Morabadi, Ranchi, Jharkhand, 834008, India
| | - Sanjit Sarkar
- Department of Geography, Central University of Karnataka, Kalaburagi, Karnataka, 585311, India
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Roubeau Dumont E, Gao X, Zheng J, Macairan J, Hernandez LM, Baesu A, Bayen S, Robinson SA, Ghoshal S, Tufenkji N. Unraveling the toxicity of tire wear contamination in three freshwater species: From chemical mixture to nanoparticles. J Hazard Mater 2023; 453:131402. [PMID: 37062096 DOI: 10.1016/j.jhazmat.2023.131402] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/01/2023] [Accepted: 04/11/2023] [Indexed: 05/03/2023]
Abstract
Tire wear particle (TWP) contamination is of growing concern as recent studies show the ubiquity and toxicity of this contaminant in various environmental compartments. The multidimensional aspect of TWPs makes it difficult to assess toxicity and predict impacts on ecosystems, as it combines a complex mixture of chemicals and can release micro- and nanoparticles when suspended in water. Our work aimed to shed light on the toxicity of the different components of TWP leachate, namely, the dissolved chemicals and the nanoparticle fractions, on three freshwater model species of different trophic levels: Chlorella vulgaris, Lemna minor, and Daphnia magna. Acute toxicity was observed for all three fractions in D. magna, and an additive effect was observed between the nanoparticles and dissolved chemicals. L. minor experienced phytotoxicity from the dissolved chemicals only with a decrease up to 50% in photosynthesis efficiency parameters. C. vulgaris showed minor signs of toxicity on apical endpoints in response to each of the fractions. Our study highlights that nanoparticles from TWP leachate that were mostly overlooked in several previous studies are as toxic as dissolved chemicals for the filter-feeder species D. magna, and we also show the toxicity to photosynthesis in aquatic plants.
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Affiliation(s)
- E Roubeau Dumont
- Department of Chemical Engineering, McGill University, Montreal H3A 0C5, Quebec, Canada.
| | - X Gao
- Department of Civil Engineering, McGill University, Montreal H3A 0C3, Quebec, Canada
| | - J Zheng
- Department of Food Science and Agricultural Chemistry, McGill University, Sainte Anne de Bellevue, Quebec H9X 3V9, Canada
| | - J Macairan
- Department of Chemical Engineering, McGill University, Montreal H3A 0C5, Quebec, Canada
| | - L M Hernandez
- Department of Chemical Engineering, McGill University, Montreal H3A 0C5, Quebec, Canada
| | - A Baesu
- Department of Food Science and Agricultural Chemistry, McGill University, Sainte Anne de Bellevue, Quebec H9X 3V9, Canada
| | - S Bayen
- Department of Food Science and Agricultural Chemistry, McGill University, Sainte Anne de Bellevue, Quebec H9X 3V9, Canada
| | - S A Robinson
- Environment and Climate Change Canada, Ecotoxicology and Wildlife Health Division, Ottawa K1A 0H3, Ontario, Canada
| | - S Ghoshal
- Department of Civil Engineering, McGill University, Montreal H3A 0C3, Quebec, Canada
| | - N Tufenkji
- Department of Chemical Engineering, McGill University, Montreal H3A 0C5, Quebec, Canada.
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Bahl A, Panda N, Bakshi J, Verma R, Oinam A, Mohindra S, Ghoshal S, Gupta R. 23P Treatment outcomes in nasal cavity and paranasal sinus tumors treated with postoperative volumetric modulated arc therapy. ESMO Open 2023. [DOI: 10.1016/j.esmoop.2023.101044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Dey T, Rai B, Radhika S, Saha P, Rana S, Gowda S, Ghoshal S. Circulating Cell Free DNA as Predictive Biomarker in Cervical Cancer Patients Treated with Radical Chemo-Radiation. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dhiman S, Rai B, Vamsi K, Gowda S, Anand D, Miriyala R, Arora M, Jain V, Ghoshal S. Hypofractionated Two Week Short-Course Radiotherapy vs. Monthly Single Fraction Palliative Pelvic Radiation in Advanced Gynecologic Cancers. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Datta A, Ghoshal S, Pal A. 32P Prosaposin A as a potential biomarker in patients of squamous cell carcinoma of head and neck. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.09.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Ballari N, Rai B, Bahl A, Mittal BR, Ghoshal S. Prospective observational study evaluating acute and delayed treatment related toxicities of prophylactic extended field volumetric modulated arc therapy with concurrent cisplatin in cervical cancer patients with pelvic lymph node metastasis. Tech Innov Patient Support Radiat Oncol 2021; 17:48-56. [PMID: 33748442 PMCID: PMC7970137 DOI: 10.1016/j.tipsro.2021.02.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 02/10/2021] [Accepted: 02/15/2021] [Indexed: 11/30/2022] Open
Abstract
PURPOSE To evaluate the treatment related acute and delayed toxicities of extended field Volumetric modulated arc therapy (VMAT) with concurrent chemotherapy in patients of locally advanced cervical cancer with pelvic lymph nodes. MATERIAL AND METHODS From 2014 to 2016, 15 patients of locally advanced cervical cancer with Fluoro-deoxyglucose positron emission tomography (FDG-PET) positive pelvic lymph nodes were treated with extended field Simultaneous integrated boost (SIB)-VMAT 45 Gy/55 Gy/25#/5weeks and concurrent cisplatin. Acute toxicities were documented according to common terminology criteria for adverse events version 4 (CTCAE v.4). Dose volume parameters and patient characteristics were analyzed for association with toxicities. RESULTS Median age of patients at diagnosis was 48 years. 40% (6 patients) were stage IIB & 60% (9 patients) were stage IIIB. Median number of involved pelvic lymph nodes was 2 (range, 1-4), commonest location was external iliac lymph node region (86%). Median number of concurrent chemotherapy cycles received was five. Treatment was well tolerated and there were no grade ≥ 3 acute toxicities. Commonest acute toxicities observed were vomiting (≥grade2 -13.3%) followed by & nausea (grade ≥ 2 in 6%) and were associated with volume of bowel bag receiving 45 Gy. Constitutional symptoms (≥grade 2) were observed in 6% patients and had no dosimetric associations. At a median follow up of 43 months, delayed ≥ grade1, 2, 3 toxicity were observed in 80%, 0%, and 0% respectively with diarrhea being the commonest. CONCLUSION Prophylactic para aortic extended field VMAT with concurrent chemotherapy for locally advanced cervical cancer is well tolerated with acceptable acute toxicity profile. Significant grade 3 acute/delayed toxicities were not observed in this cohort of patients.
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Affiliation(s)
- N Ballari
- Departments of Radiotherapy, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - B Rai
- Departments of Radiotherapy, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - A Bahl
- Departments of Radiotherapy, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - B R Mittal
- Nuclear Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - S Ghoshal
- Departments of Radiotherapy, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
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Bahl A, Elangovan A, Oinam A, Kumar R, Mittal B, Verma R, Panda N, Ghoshal S. PO-080 Radiotherapy versus concurrent chemo radiotherapy in cancers of unknown primary of Head and Neck. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)30246-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ballari N, Jindia T, Annam L, Miriyala R, Ghoshal S. Do time, distance and economic factors influence stage of presentation of malignancies? Experience from a regional cancer center (RCC) in India. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy442.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ballari N, Miriyala R, Jindia T, Gedela S, Annam L, Ghoshal S. Time, Distance and Economics Influencing Cancer Care: Experience From a Regional Cancer Center in India. J Glob Oncol 2018. [DOI: 10.1200/jgo.18.76900] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: There is a geographical, socioeconomical and logistic diversity among the cancer patients who reach a regional cancer center. In a developing economy like that of India's, only a minority of patients have medical insurance. So in our setup a cancer patient is met with time, distance and financial challenges. These intangible factors theoretically are expected to influence the ultimate outcome of cancer treatment. Aim: To evaluate the prevailing demographic and economic variables of cancer patients visiting our RCC and to look for any correlation among each other. Methods: The demographic details of cancer patients registered at our RCC between August 2017- September 2017 were retrieved retrospectively. Distance traveled to get to the RCC and get a diagnosis of cancer, time taken for diagnosis and initiation of treatment, and the source of finances for treatment were collected. A correlation among these factors was attempted to be identified. Statistical correlation was identified using Student t-test. Results: Among 591 patients who were analyzed, the median age of patient was 55 years old. The median time taken for the patient to reach the RCC from permanent residence after the beginning of cancer related complaints was 3.19 months. The median distance traveled for the same was 131 km. The source of income was private employment for 223 patients and government employment for 164 patients and self-employment for 200 patients. Only 164 patients had some kind of structured health scheme to manage their health care expenses. Among these, 96 patients had private insurance/reimbursement and 64 patients had government reimbursement. 384 (64%) of patients presented with advanced and locally advanced stage disease while 114 (19%) patients presented to us with early stage disease. However a correlation between delay in presentation to the RCC, distance traveled to reach the RCC, source of income and advanced stage of disease couldn't not be established. Conclusion: Majority of patients visiting our RCC is from far off places and most of these patients pay for the cancer treatment themselves without any support from government or private insurances. All these factors may be responsible for late or advanced stage presentation of cancer patients.
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Yadav B, Sharma S, Singh R, Ghoshal S. Post-mastectomy hypofractionated radiotherapy in stage II and III breast cancer. Eur J Cancer 2018. [DOI: 10.1016/s0959-8049(18)30407-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kumar M, Ghoshal S, Pal A. Cripto-1 expression and its correlation with outcomes in oropharyngeal carcinoma treated by chemoradiation. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx653.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mahajan R, Yadav B, Sharma S, Ghoshal S, Kapoor R, Kumar N. Primary bone lymphoma: An experience of a regional cancer centre from India. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx664.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Gupta A, Mathew D, Ghoshal S, Pal A. Role of DNA repair gene polymorphisms in prediction of radiation toxicity in oropharyngeal cancers. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx508.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Agarwala M, Ghoshal S, Verchot L, Martius C, Ahuja R, DeFries R. Impact of biogas interventions on forest biomass and regeneration in southern India. Glob Ecol Conserv 2017. [DOI: 10.1016/j.gecco.2017.06.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Shankar A, Dracham C, Ghoshal S, Grover S. Prevalence of depression and anxiety disorder in cancer patients: An institutional experience. Indian J Cancer 2017; 53:432-434. [PMID: 28244477 DOI: 10.4103/0019-509x.200651] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIM This study aimed to screen the patients with various malignancies for the presence of depressive disorders and anxiety disorder using standardized rating scales. MATERIALS AND METHODS Five hundred and thirty-four (n = 534) patients attending the radiotherapy outpatient services completed the Patient Health Questionnaire-9 and Generalized Anxiety Disorder-7 (GAD-7) Questionnaire. RESULTS About half (n = 248; 46.4%) of the patients had psychiatric morbidity either in the form of depressive disorder or in the form of GAD. Higher stage of malignancy (from early, advanced to metastasis) was associated with higher prevalence of depressive disorder and GAD. The presence of psychiatric morbidity, especially anxiety disorder, was associated with being from low socioeconomic status. CONCLUSION The present study suggests that psychiatric morbidity in the form of depressive and anxiety disorders is very common among patients with malignancies. Accordingly, there is a need for close liaison between oncologists and mental health professionals to improve the outcome of patients with various malignancies.
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Affiliation(s)
- A Shankar
- Department of Radiotherapy, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - C Dracham
- Department of Radiotherapy, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - S Ghoshal
- Department of Radiotherapy, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - S Grover
- Department of Psychiatry, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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Singh Yadav B, Chander Sharma S, Ghoshal S, Kapoor R, Kumar N. Hypofractionated radiotherapy in breast cancer – a large institutional data set from India. Breast 2017. [DOI: 10.1016/s0960-9776(17)30255-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Yadav B, Sharma S, Bansal A, Thakur P, Yadav B, Bhusan P, Ghoshal S, Kapoor R, Kumar N. Risk Factors for Breast Cancer – How Much Weightage for Weight? Clin Oncol (R Coll Radiol) 2017. [DOI: 10.1016/j.clon.2016.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kumar M, Pal A, Jain A, Ghoshal S, Rai B, Mohindra S, Das A. 35P Clinical significance of expression of cripto-1 in patients of squamous cell carcinoma of oropharynx. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00195-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Miriyala R, Bansal A, Dracham C, Thakur P, Ghoshal S. 567P_PR Diagnostic delay in oncology: Is there a need for increasing cancer awareness among primary care physicians of developing countries? Ann Oncol 2016. [DOI: 10.1093/annonc/mdw603.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yadav B, Sharma S, Kumar N, Ghoshal S. 355P Lower radiotherapy dose in patients with Hodgkin’s lymphoma- is it comparable to the past standard? Ann Oncol 2016. [DOI: 10.1093/annonc/mdw586.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Thakur P, Kumar N, Miriyala R, Ghoshal S. 144PD Cranio-Spinal irradiation - is acute hematological toxicity. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00302-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Mahajan R, Yadav B, Kumar S, Gupta A, Ghoshal S, Sharma S, Kumar N, Kapoor R. 353P Outcome and prognostic factors in diffuse large B-cell lymphoma. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw586.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Kumar M, Pal A, Jain A, Ghoshal S, Rai B, Mohindra S, Das A. 35P Clinical significance of expression of cripto-1 in patients of squamous cell carcinoma of oropharynx. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw574.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Thakur P, Kumar N, Miriyala R, Ghoshal S. 144PD Cranio-Spinal irradiation – is acute hematological toxicity under-reported? A single institutional experience. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw578.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yadav B, Sharma S, Kumar N, Ghoshal S. 355P Lower radiotherapy dose in patients with Hodgkin's lymphoma- is it comparable to the past standard? Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00513-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Rai B, Miriyala R, Ghoshal S, Ballari N, Singla V. Margins Around the Involved Pelvic Lymph Nodes for Planning Simultaneous Integrated Boost in Patients With Cervical Cancer Undergoing Pelvic Intensity Modulated Radiation Therapy. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Miriyala R, Thakur P, Singh A, Gupta A, Yadav B, Kumar N, Rattan R, Ghoshal S. EP-1451: Workflow Management: Impact on the ergonomics of a Radiotherapy department in a developing country. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32701-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yadav B, Sharma S, Singh R, Ghoshal S. EP-1185: Male breast cancer - outcome with adjuvant treatment. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32435-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Nagpal P, Shanker A, Yadav B, Ghoshal S, Singh R, Dahiya D. 94P Metastatic behavior of subtypes in locally advanced breast carcinoma. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv519.43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bhattacharyya T, Ghoshal S, Dhanireddy B, Kumar R, Sharma SC. Efficacy of radical radiotherapy alone for functional preservation of larynx in laryngeal carcinoma: a retrospective analysis. Indian J Cancer 2015; 51:10-4. [PMID: 24947088 DOI: 10.4103/0019-509x.134600] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
PURPOSE Concurrent chemoradiation is the current standard of care in locally advanced head and neck cancer. But, in our setup, many patients of carcinoma larynx are treated with only radical radiotherapy because of poor general condition of the patients. This study was performed to assess the influence radical radiotherapy alone on functional preservation of larynx. MATERIALS AND METHODS 110 previously untreated patients with invasive squamous cell carcinoma of larynx were treated with radical radiotherapy alone between January 2006 and June 2009. Conventional one daily fraction of 2 Gy with total doses of 60-66 Gy was used. Voice preservation and local control at median follow-up period of 2 years were analyzed. Several host, tumor, and treatment parameters were also analyzed. RESULTS Among 110 patients, preservation of larynx was possible in 78 patients (71%). With radical radiotherapy alone, excellent preservation of larynx was achieved in stage I (88.9%) and stage II (75%) disease, while in advanced stages, results were not so encouraging. In stage III and stage IVA, larynx preservation was only 72.4% and 65.3%, respectively. Patients without any cartilage invasion had significantly better laryngeal preservation rate as compared to patients with cartilage invasion. (78.9% vs. 35.3%; P = 0.008). CONCLUSION Though concurrent chemoradiation is the standard of care in preservation of voice in laryngeal cancer, definitive radiotherapy alone may also be a good option in terms of preservation of larynx in patients of laryngeal cancer in community practice in the developing world where most of the patients cannot tolerate concurrent chemoradiation.
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Affiliation(s)
| | - S Ghoshal
- Department of Radiotherapy and Oncology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
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Kumar N, Bhattacharyya T, Chanchalani K, Kumar R, Shalunke P, Radotra BD, Yadav BS, Ghoshal S. RT-15 * IMPACT OF CHANGING TRENDS OF TREATMENT ON OUTCOME OF GLIOSARCOMA: A TERTIARY CARE CENTER EXPERIENCE. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou270.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Affiliation(s)
- S Juverdeanu
- Department of Obstetrics and Gynaecology Fairfield General Hospital, UK.
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Bahl A, Ghoshal S, Sharma SC. Increased risk of ischemic stroke in young nasopharyngeal carcinoma patients. in regard to Lee et al. (Int J Radiat Oncol Biol Phys 2011;81:e833-e838). Int J Radiat Oncol Biol Phys 2012; 82:1321; author reply 1321. [PMID: 22385718 DOI: 10.1016/j.ijrobp.2011.11.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Accepted: 11/01/2011] [Indexed: 11/26/2022]
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Yadav BS, Ghoshal S, Sharma SC. Outcome following radical cystectomy and bladder-preservation therapy in patients with invasive carcinoma of urinary bladder. Indian J Urol 2011; 24:48-53. [PMID: 19468359 PMCID: PMC2684249 DOI: 10.4103/0970-1591.38603] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Background: Invasive bladder cancer is a lethal disease with a 50% cancer-related mortality even in the best healthcare systems. Optimum combination of surgery, external beam radiotherapy and platinum-based chemotherapy has yet to be determined. Purpose: To audit the outcome of multi-modality treatment and compare this with the existing literature in order to set future priorities and re-audit in patients with invasive carcinoma of urinary bladder. Materials and Methods: Between January 2001 and December 2004, 97 patients with invasive carcinoma of urinary bladder were analyzed. Radical surgery was done in 18(18%) patients and adjuvant radiation was given to 20(21%) patients. Radical radiation alone, (≥50 Gy) was given to 26(27%) and chemoradiation to 33(34%) patients respectively. Patients in the chemoradiation arm were given the same dose of radiation with weekly concomitant cisplatin at 40 mg/ m2 one hour before radiation during the first phase only. At a median follow-up of 32 months the outcome studied included locoregional failure, distant failure, disease-free survival (DFS) and overall survival (OS) using univariate and multivariate analyses. The OS and DFS were calculated according to Kaplan-Meier. Log rank test was used for statistical significance. Results: Median age of the patients was 58 years. Males comprised 93% of the total patients. Most (93%) of the patients had transitional cell histology. In patients treated with radiation alone overall response rate was 60%, with a complete response (CR) rate of 42%. The CR in patients treated with chemoradiation was 51%. Bladder was preserved in 61% of patients who received chemoradiation as compared to 42% in patients treated with radical radiation. With radical radiation local recurrence rate was 19% as compared to 22% with surgery and 6% with chemoradiation, respectively. Local recurrence rate was only 5% in patients treated with adjuvant radiation. Distant metastasis rate was least with chemoradiation (9%) as compared to 11.5% in radical radiation: curable dose of radiation and 33% with surgery alone, respectively. Patients with adjuvant radiation had a distant metastases rate of 15%. Median OS was 36 months. Factors affecting OS were histology (P = 0.023) and nodal involvement (P = 0.034). Median DFS was 26 months. Significant factors affecting DFS on univariate analysis were histology (P = 0.046) and nodal involvement (P = 0.004). On multivariate analysis the only factor affecting DFS and OS was nodal involvement (P = 0.01; Hazard Ratio, 0.085-0.719). Conclusion: In patients with invasive bladder cancer, combined modality in the form of radical cystectomy followed by radiation give best local control. Radiation alone is not effective to control muscle-invasive local disease; however, Chemoradiation is an effective alternative to radical cystectomy to preserve bladder function.
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Affiliation(s)
- B S Yadav
- Department of Radiotherapy, PGIMER, Chandigarh, India
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Chakraborty S, Ghoshal S, Patil V, Oinam A, Suresh S. Acute Toxicities Experienced during Simultaneous Integrated Boost Intensity-modulated Radiotherapy in Head and Neck Cancers — Experience from a North Indian Regional Cancer Centre. Clin Oncol (R Coll Radiol) 2009; 21:676-86. [DOI: 10.1016/j.clon.2009.07.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2009] [Revised: 07/27/2009] [Accepted: 07/28/2009] [Indexed: 11/25/2022]
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Dhar KK, Foden-Shroff J, Ghoshal S, Tucker H, Millinship J, Redman CW. Local anaesthesia for large loop excision of the cervical transformation zone: has prilocaine/felypressin less side effects than lignocaine/adrenaline? J OBSTET GYNAECOL 2009; 18:373-4. [PMID: 15512113 DOI: 10.1080/01443619867164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- K K Dhar
- Colposcopy Clinic, North Staffordshire Hospital, Stoke on Trent, UK
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Oinam AS, Singh L, Goswami P, Sharma SC, Ghoshal S, Kapoor R. SU-FF-T-201: Dosimetric Verification of Dynamic IMRT Plans Using I'mRT MatriXX. Med Phys 2009. [DOI: 10.1118/1.3181676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Abstract
A 20-year-old male patient presented with fungating scrotal mass. Investigations revealed yolk sac tumor with lung metastasis. The patient was treated with systemic chemotherapy. There was complete disappearance of the scrotal mass as well as metastatic disease from the lung. Fungating scrotal mass is a rare presentation of testicular tumor. This rare presentation is reported here. This is second such case in the English literature.
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Affiliation(s)
- B S Yadav
- Department of Radiotherapy, Post Graduate Institute of Medical Education and Research, Chandigarh, India
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Ghoshal S, Goda JS, Mallick I, Kehwar TS, Sharma SC. Concomitant boost radiotherapy compared with conventional radiotherapy in squamous cell carcinoma of the head and neck--a phase III trial from a single institution in India. Clin Oncol (R Coll Radiol) 2008; 20:212-20. [PMID: 18343310 DOI: 10.1016/j.clon.2008.01.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2007] [Revised: 01/22/2008] [Accepted: 01/30/2008] [Indexed: 11/29/2022]
Abstract
AIMS To test the efficacy of an accelerated fractionation schedule (concomitant boost) against standard conventional fractionation in squamous cell carcinomas of the head and neck region in our patient population. MATERIALS AND METHODS Patients were randomised to receive either conventional radiotherapy with 2 Gy/fraction/day, to a dose of 66 Gy in 33 fractions over 6.5 weeks or accelerated radiotherapy in the form of concomitant boost to a dose of 67.5 Gy/40 fractions over 5 weeks (phase 1: 45 Gy/25 fractions/5 weeks and phase 2: 22.5 Gy/15 fractions/3 weeks as a second daily fraction after a 6h gap). The primary and secondary end points were disease-free survival and locoregional control respectively. RESULTS The compliance was 97.2% and 96.5% in the concomitant boost and conventional arms, respectively. Patients treated with concomitant boost had a better 2-year disease-free survival (71.7% vs 52.17%, P=0.0007) and locoregional control rates (73.6% vs 54.5%, P=0.0006) than with conventional fractionation. On exploratory subgroup analysis, the oropharynx (P<0.001), T4 lesions (P=0.017), N+ disease (P<0.001) and stage IV disease (P<0.001) were statistically significant prognostic variables in favour of the concomitant boost arm. Grade 3 mucositis was seen in 35% of patients in the concomitant boost arm, whereas in the conventional arm only 19% of patients had grade 3 mucositis (P=0.01). The median radiotherapy duration in the concomitant boost arm was 36 days (range 36-53 days), whereas in the conventional arm it was 46 days (range 46-64 days). The mean gap in radiation treatment in the concomitant boost arm was 1.68 days (range 0-14 days), whereas the mean gap in the conventional arm was 1.58 days (range 0-14 days). CONCLUSIONS Concomitant boost is a therapeutically superior and logistically feasible accelerated radiotherapy regimen in advanced head and neck cancers, especially in the setting of a developing country.
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Affiliation(s)
- S Ghoshal
- Post Graduate Institute of Medical Education and Research, Chandigarh, India.
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Lakshmi V, Saxena A, Mishra S, Mishra M, Srivastava S, Ghoshal S. Antiamoebic activity of marine sponge Haliclona exigua (Krikpatrick). BANGL J PHARMACOL 2008. [DOI: 10.3329/bjp.v4i1.1083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Bhardwaj A, Sharma SC, Patel FD, Ghoshal S, Oinam AS, Kapoor R, Kumar R, Goswami P. SU-GG-T-154: Use of I'mRT MatriXX for Routine Dynamic MLC QA and IMRT Dose Verification. Med Phys 2008. [DOI: 10.1118/1.2961905] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Affiliation(s)
- S Ghoshal
- Department of Obstetrics and Gynaecology, Lancashire Teaching Hospital, Preston, UK.
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Mallick I, Sharma SC, Behera D, Ghoshal S, Oinam AS. Optimization of dose and fractionation of endobronchial brachytherapy with or without external radiation in the palliative management of non-small cell lung cancer: a prospective randomized study. J Cancer Res Ther 2007; 2:119-25. [PMID: 17998689 DOI: 10.4103/0973-1482.27586] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIMS Endobronchial brachytherapy (EBBT) is an established modality for the palliation in advanced non-small cell lung cancer. We compared three different schedules using EBBT with or without external radiation (XRT) in this setting. MATERIALS AND METHODS Forty-five patients were randomized to three treatment arms. Arm A received XRT to a dose of 30 Gy/10 fr/2 weeks and two sessions of EBBT 8 Gy each. Arm B received the same XRT and a single session of EBBT 10 Gy at 1 cm. Arm C received only a single fraction of brachytherapy to a dose of 15 Gy at 1 cm without XRT. Symptomatic response rates, duration of symptom palliation, obstruction scores, quality of life outcomes and complications were assessed and compared. RESULTS The overall symptomatic response rates were 91% for dyspnea, 84% for cough, 94% for hemoptysis and 83% for obstructive pneumonia. There was no significant difference between the arms. The median time to symptom relapse was 4-8 months for all symptoms and the median time to symptom progression was 6-11 months. The results were comparable between groups except for hemoptysis, where a shorter palliation was seen in Arm C that achieved statistical significance (P < 0.01). Quality of life showed significant improvement, with maximum benefit in Arm A. Complication rates were low. Only one patient died of fatal hemoptysis. CONCLUSION EBBT is thus a safe and effective palliative tool in advanced non-small cell lung cancer, either alone or in conjunction with XRT. The difference between the treatment arms were not statistically significant in most categories, but patients treated with XRT and two endobronchial sessions of 8 Gy had the most consistent benefit in terms of all the parameters studied.
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Affiliation(s)
- I Mallick
- Department of Radiotherapy, Post-graduate Institute of Medical Education and Research, Chandigarh, India.
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Yadav BS, Sharma SC, Patel FD, Ghoshal S, Kapoor V. Results of letrozole in postmenopausal women after tamoxifen treatment for advanced breast cancer. J Cancer Res Ther 2007; 3:71-4. [PMID: 17998726 DOI: 10.4103/0973-1482.34682] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIM To analyze overall and progression-free survival after letrozole in postmenopausal women with advanced breast cancer who failed after tamoxifen therapy. MATERIALS AND METHODS This is a retrospective analysis of 95 patients with breast cancer who were postmenopausal and had failed after tamoxifen therapy. Dose of letrozole was 2.5 mg daily until disease progressed. Patients had estrogen receptor- and/or progesterone receptor-positive tumors or both receptors were unknown. One complete course of (6 cycles) chemotherapy for metastatic disease was allowed. The primary end point was time to progression (TTP). Secondary end points included overall objective response rate (ORR), its duration, time to treatment failure (TTF), overall survival and tolerability. RESULTS Median TTP was 10 months. ORR was 21% with complete response rate of 9%. Nine patients died of disease during treatment. Median overall survival was 36 months. Median time to response was three months and median duration of response was 13 months. Time to chemotherapy was 13.5 months and TTF was 9.3 months. Treatment failure was seen in 76% of patients. Disease progression was the main cause for treatment failure. Treatment was well-tolerated by all patients. CONCLUSION This retrospective analysis shows that letrozole is quite effective as second line therapy in postmenopausal patients with advanced breast cancer who had failed after tamoxifen therapy.
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Affiliation(s)
- B S Yadav
- Dept. of Radiotherapy, Postgraduate Institute of Medical Education and Research, Chandigarh-160 012, India.
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Yadav BS, Sharma SC, Patel FD, Ghoshal S, Kapoor R, Kumar R. Treatment of carcinoma of unknown primary. Indian J Palliat Care 2007. [DOI: 10.4103/0973-1075.37183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Sastri GJ, Ghoshal S, Kehwar TS, Sharma SC. Concommitant boost: An effective regimen in locoregionally advanced head and neck cancers—A phase III randomised trial from a single institute in India. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.5546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
5546 Background: The basic objective of this randomized trial was to test the efficacy of concomitant boost against standard fractionation in advanced head and neck cancers. Material and Methods: 285 patients with advanced head and neck cancers were randomized to receive either conventional radiotherapy 66 Gy/33 #/6.5 weeks or concomitant boost to a dose of 67.5 Gy/40 #/5 weeks. Results: The compliance to treatment was equal in both the arms.With a median follow up of 24 months, patients treated with concomitant boost had a significantly better two-year disease free survival and overall survival (p = 0.007 and p = 0.001respectively) than those treated by conventional fractionation. Grade III mucositis was seen in 35% patients in the concomitant boost arm and 19% in the conventional arm. On univariate analysis, the difference in outcome of oropharyngeal lesion p = 0.000, T3&T4 lesions (p = 0.004), Stage IV disease (p = 0.0005) and N+ disease (p = 0.000) were statistically significant in favour of concomitant boost arm. On multivariate analysis base of tongue site was an independent prognostic factor. Conclusions: Concomitant boost is an effective regimen in advanced head and neck cancers. In developing countries where 50–60% patients present at an advanced stage, this seems to be an optimal radiation therapy regimen especially in advanced oropharyngeal cancers. No significant financial relationships to disclose.
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Ong WY, Sundaram RK, Huang E, Ghoshal S, Kumar U, Pentchev PG, Patel SC. Neuronal localization and association of Niemann Pick C2 protein (HE1/NPC2) with the postsynaptic density. Neuroscience 2005; 128:561-70. [PMID: 15381285 DOI: 10.1016/j.neuroscience.2004.07.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/04/2004] [Indexed: 11/19/2022]
Abstract
Niemann-Pick disease type C (NP-C) is an inherited disorder that is characterized biochemically by cellular cholesterol and glycolipid storage, and clinically by progressive neurodegeneration. Most cases of NP-C are caused by inactivating mutations of the npc1 gene, but about 5% are linked to npc2, which encodes a soluble cholesterol binding protein, previously identified as epididymal secretory glycoprotein 1 (HE1). The present study was carried out to investigate the immunocytochemical localization of HE1/NPC2 protein in the mouse brain. Using an antibody against recombinant HE1/NPC2, we found HE1/NPC2 to be localized predominantly in neurons in the brain. Immunoreactivity for HE1/NPC2 was observed in pyramidal or projection neurons in the cerebral cortex and amygdala, and Purkinje neurons in the cerebellum. Neurons in the thalamus, hypothalamus, and globus pallidus were lightly labeled, or unlabeled. This regional pattern of expression of HE1/NPC2 is similar to our previous findings with NPC1, with a low level of expression of both NPC1 and HE1/NPC2 proteins in regions derived from the diencephalon, such as the thalamus and hypothalamus. In contrast to NPC1, however, which is predominantly in astrocytes, HE1/NPC2 was observed mainly in neurons. Electron microscopic immunocytochemistry showed that HE1/NPC2 is present in the cytosol of dendrites and on post-synaptic densities (PSD). The occurrence of HE1/NPC2 in the PSD was confirmed by Western blots of PSD-enriched brain subcellular fractions that showed the presence of HE1/NPC2 together with the PSD-associated protein, PSD-95. These results suggest that NPC1 and HE1/NPC2 are differentially enriched in astrocytes and neurons, respectively, and that HE1/NPC2 may function in supporting the integrity of the PSD of neurons.
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Affiliation(s)
- W Y Ong
- Department of Anatomy, National University of Singapore, Singapore 119260
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Phoenix P, Keane A, Patel A, Bergeron H, Ghoshal S, Lau PCK. Characterization of a new solvent-responsive gene locus in Pseudomonas putida F1 and its functionalization as a versatile biosensor. Environ Microbiol 2004; 5:1309-27. [PMID: 14641576 DOI: 10.1111/j.1462-2920.2003.00426.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A new gene cluster, designated sepABC and a divergently transcribed sepR, was found downstream of the two-component todST phosphorelay system that regulates toluene degradation (the tod pathway) in Pseudomonas putida F1 (PpF1). The deduced amino acid sequences encoded by sepABC show a high homology to bacterial proteins known to be involved in solvent efflux or multidrug pumps. SepA, SepB and SepC are referred to be periplasmic, inner membrane and outer membrane efflux proteins respectively. Effects on growth of various PpF1 mutants compared to that of the wild type in the presence of toluene indicated a possible protective role of the solvent efflux system in a solvent-stressed environment. Growth tests with the complemented mutants confirmed the involvement of the Sep proteins in conferring solvent tolerance. The sepR gene encodes a 260-residue polypeptide that is a member of the E. coli IclR repressor protein family. The repressor role of SepR was established by conducting tests with a sep-lacZ transcriptional fusion in Escherichia coli and PpF1, expression of SepR as a maltose-binding fusion protein in a DNA binding assay, and mRNA analysis. Southern hybridization experiments and analysis of the P. putida KT2440 genome sequence indicated that sepR is a relatively rare commodity compared to homologues of the sepABC genes. We developed a whole-cell bioluminescent biosensor, PpF1G4, which contains a chromosomally based sep-lux transcriptional fusion. The biosensor showed significant induction of the sepABC genes by a wide variety of aromatic molecules, including benzene, toluene, ethylbenzene, and all three isomers of xylene (BTEX), naphthalene, and complex mixtures of aliphatic and aromatic hydrocarbons. PpF1G4 represents a second-generation biosensor that is not based on a catabolic promoter but is nonetheless inducible by aromatic pollutants and moreover functional under nutrient-rich conditions.
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MESH Headings
- Bacterial Proteins/chemistry
- Bacterial Proteins/genetics
- Bacterial Proteins/metabolism
- Base Sequence
- Biosensing Techniques
- DNA, Bacterial/chemistry
- DNA, Bacterial/isolation & purification
- Environmental Pollutants/analysis
- Environmental Pollutants/metabolism
- Gene Deletion
- Gene Expression Regulation, Bacterial
- Genes, Bacterial
- Genes, Reporter
- Genetic Complementation Test
- Hydrocarbons, Aromatic/analysis
- Hydrocarbons, Aromatic/metabolism
- Hydrocarbons, Aromatic/pharmacology
- Lac Operon
- Luminescent Measurements
- Membrane Transport Proteins/genetics
- Membrane Transport Proteins/metabolism
- Molecular Sequence Data
- Promoter Regions, Genetic
- Pseudomonas putida/genetics
- Pseudomonas putida/metabolism
- Repressor Proteins/genetics
- Repressor Proteins/metabolism
- Sequence Analysis, DNA
- Sequence Homology
- Solvents/analysis
- Solvents/metabolism
- Solvents/pharmacology
- Toluene/metabolism
- Toluene/pharmacology
- beta-Galactosidase/metabolism
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Affiliation(s)
- P Phoenix
- Biotechnology Research Institute, National Research Council Canada, 6100 Royalmount Ave., Montreal, Quebec, Canada H4P 2R2
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