1
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Lahiri SK, Azimi Dijvejin Z, Gholamreza F, Shabanian S, Khatir B, Wotherspoon L, Golovin K. Liquidlike, Low-Friction Polymer Brushes for Microfibre Release Prevention from Textiles. Small 2024:e2400580. [PMID: 38529758 DOI: 10.1002/smll.202400580] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/12/2024] [Indexed: 03/27/2024]
Abstract
During synthetic textile washing, rubbing between fibres or against the washing machine, exacerbated by the elevated temperature, initiates the release of millions of microplastic fibres into the environment. A general tribological strategy is reported that practically eliminates the release of microplastic fibres from laundered apparel. The two-layer fabric finishes combine low-friction, liquidlike polymer brushes with "molecular primers", that is, molecules that durably bond the low-friction layers to the surface of the polyester or nylon fabrics. It is shown that when the coefficient of friction is below a threshold of 0.25, microplastic fibre release is substantially reduced, by up to 96%. The fabric finishes can be water-wicking or water-repellent, and their comfort properties are retained after coating, indicating a tunable and practical strategy toward a sustainable textile industry and plastic-free oceans and marine foodstuffs.
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Affiliation(s)
- Sudip Kumar Lahiri
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
| | - Zahra Azimi Dijvejin
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
| | - Farzan Gholamreza
- School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Sadaf Shabanian
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
- School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Behrooz Khatir
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
| | - Lauren Wotherspoon
- Department of Materials Science & Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
| | - Kevin Golovin
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
- Department of Materials Science & Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
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2
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Soltani M, Lahiri SK, Shabanian S, Golovin K. Surface-engineered double-layered fabrics for continuous, passive fluid transport. Mater Horiz 2023; 10:4293-4302. [PMID: 37409585 DOI: 10.1039/d3mh00634d] [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] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
Textiles with a wicking finish transport moisture away from the skin, such that it is exposed to the environment for fast evaporation, aiding in thermophysiological comfort. Once saturated, such as in highly humid environments or if the wearer dons multiple layers, the efficacy of such a finish is substantially reduced. Here, we develop a new type of fluid transport textile design by combining physical and chemical wettability patterns to transport and remove liquids like sweat. First, a non-toxic, superhydrophobic fabric finish is developed that retains the air permeability of the fabric. Next, two superhydrophobic fabric layers are threaded together, containing wettability channels patterned at the inner/interior side of the fabrics. This design allows for liquid transport through the stitches to the interior channels and keeps both external faces dry. The developed strategy enables directional fluid transport under highly humid conditions, resulting in a ∼20 times faster transport rate than evaporation-based methods. The design principles described here can be used to provide thermophysiological comfort for users in extreme conditions, such as firefighters, law enforcement personnel, and health workers wearing personal protective ensembles.
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Affiliation(s)
- Mohammad Soltani
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, M5S 3G8, Canada.
| | - Sudip Kumar Lahiri
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, M5S 3G8, Canada.
| | - Sadaf Shabanian
- School of Engineering, University of British Columbia, Kelowna, British Columbia, V1V 1V7, Canada
| | - Kevin Golovin
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, M5S 3G8, Canada.
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3
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Quang HHP, Dinh DA, Dutta V, Chauhan A, Lahiri SK, Gopalakrishnan C, Radhakrishnan A, Batoo KM, Thi LAP. Current approaches, and challenges on identification, remediation and potential risks of emerging plastic contaminants: A review. Environ Toxicol Pharmacol 2023:104193. [PMID: 37348772 DOI: 10.1016/j.etap.2023.104193] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 06/05/2023] [Accepted: 06/19/2023] [Indexed: 06/24/2023]
Abstract
Plastics are widely employed in modern civilization because of their durability, mold ability, and light weight. In the recent decade, micro/nanoplastics research has steadily increased, highlighting its relevance. However, contaminating micro/nanoplastics in marine environments, terrestrial ecosystems, and biological organisms is considered a severe threat to the environmental system. Geographical distribution, migration patterns, etymologies of formation, and ecological ramifications of absorption are just a few topics covered in the scientific literature on environmental issues. Degradable solutions from material science and chemistry are needed to address the micro/nanoplastics problem, primarily to reduce the production of these pollutants and their potential effects. Removing micro/nanoplastics from their discharge points has been a central and effective way to mitigate the adverse pollution effects. In this review, we begin by discussing the hazardous effect on living beings and the identification-characterization of micro/nanoplastics. Then, we provide a summary of the existing degradation strategies, which include bio-degradation and advanced oxidation processes (AOPs), and a detailed discussion of their degradation mechanisms is also represented. Finally, a persuasive summary of the evaluated work and projections for the future of this topic is provided.
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Affiliation(s)
- Huy Hoang Phan Quang
- Faculty of Biology and Environment, Ho Chi Minh City University of Food Industry, 140 Le Trong Tan Street, Tay Thanh Ward, Tan Phu District, Ho Chi Minh City, Vietnam
| | - Duc Anh Dinh
- VKTech Research Center, NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 700000, Viet Nam
| | - Vishal Dutta
- University Centre for Research and Development, Department of Chemistry, Chandigarh University, Gharuan, Mohali, Punjab.
| | - Ankush Chauhan
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam-603103, Tamil Nadu, India.
| | - Sudip Kumar Lahiri
- Department of Mechanical & Industrial Engineering, 5 King's College Road, University of Toronto, Canada
| | - C Gopalakrishnan
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Tamil Nadu, 603203, India
| | - Arunkumar Radhakrishnan
- Department of Pharmacology, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam-603103, Tamil Nadu, India
| | - Khalid Mujasam Batoo
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia
| | - Lan-Anh Phan Thi
- VNU Key Laboratory of Analytical Technology for Environmental Quality and Food Safety Control (KLATEFOS), University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai, Hanoi, Vietnam; Center for Environmental Technology and Sustainable Development (CETASD), University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai, Hanoi, Vietnam.
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4
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Rehman R, Lahiri SK, Islam A, Wei P, Xu Y. Self-Assembled Hierarchical Cu x O@C 18H 36O 2 Nanoflakes for Superior Fenton-like Catalysis over a Wide Range of pH. ACS Omega 2021; 6:22188-22201. [PMID: 34497910 PMCID: PMC8412932 DOI: 10.1021/acsomega.1c02881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 08/04/2021] [Indexed: 06/13/2023]
Abstract
A novel copper-based catalyst supported by a long-chain hydrocarbon stearic acid (Cu x O@C18H36O2) was synthesized by a hydrothermal method and double replacement reactions. The as-prepared catalyst is shown as self-assembled hierarchical nanoflakes with an average size of ∼22 nm and a specific surface area of 51.4 m2 g-1. The catalyst has a good performance on adsorption as well as Fenton-like catalytic degradation of Rhodamine B (RhB). The catalyst (10 mg/L) showed an excellent adsorption efficiency toward RhB (20 mg/L) for pH ranging from 5 to 13, with the highest adsorption rate (99%) exhibited at pH 13. The Fenton-like catalytic degradation reaction of RhB (20 mg/L) by Cu x O@C18H36O2 nanoflakes was effective over a wide range of pH of 3-11, and •OH radicals were generated via Cu2O/H2O2 interactions in acidic conditions and CuO/H2O2 reactions in a neutral solution. The highest efficiency catalytic degradation of RhB (20 mg/L) was 99.2% under acidic conditions (pH = 3, H2O2 = 0.05 M), with an excellent reusability of 96% at the 6th cycle. The results demonstrated that the as-prepared Cu x O@C18H36O2 nanoflakes are an efficient candidate for wastewater treatment, with excellent adsorption capacity and superior Fenton-like catalytic efficiency and stability for RhB.
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Affiliation(s)
- Ratul Rehman
- School
of Materials Science and Engineering and State Key Laboratory for
Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
| | - Sudip Kumar Lahiri
- School
of Materials Science and Engineering and State Key Laboratory for
Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
| | - Ashraful Islam
- State
Key Laboratory of Environmental Aquatic Chemistry, Research Center
for Eco-Environmental Sciences, University
of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Peng Wei
- School
of Materials Science and Engineering and State Key Laboratory for
Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
| | - Yue Xu
- School
of Materials Science and Engineering and State Key Laboratory for
Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
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5
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Lahiri SK, Liu L. Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO 2-H 3BO 3-Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater. Langmuir 2021; 37:8753-8764. [PMID: 34251834 DOI: 10.1021/acs.langmuir.1c01046] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This study reports a novel cross-linking approach to fabricate the hydrothermally neutralized silica hydrogel of SiO2-H3BO3-hexadecyltrimethoxysilane by grafting alkylsilane groups onto the nanoporous silica. The synthesized silica hydrogel possessed a large specific surface area of 51.3 m2g-1 and showed excellent dye adsorption capability of cationic dyes in neutral (pH 7) and alkaline (pH 9) medium from wastewater. The colloidal electrokinetic potential analysis revealed that the outstanding adsorption efficiency of cationic dyes over anionic dyes strongly relies on the surface charge of the hydrogels. Moreover, the hydrophobic interactions between the dye molecules and the hydrogels were studied, and it was found that the dye adsorption performance can be tuned by altering the concentration of hydrophobic reagents of the hydrogel. The dye adsorption mechanism was established, and the kinetic study suggested that the adsorption is a pseudo-second-order reaction. Adsorption isotherms at various equilibrium conditions fitted well with the Langmuir isotherm. Therefore, this strongly supports the promising and practical application of the prepared silica hydrogel. The recyclability of the hydrogel was studied, and it showed 90% adsorption efficiency by the regenerated gel up to 6 cycles, which has a high potential in wastewater treatment.
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Affiliation(s)
- Sudip Kumar Lahiri
- School of Materials Science and Engineering and State Key Laboratory for Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Lin Liu
- School of Materials Science and Engineering and State Key Laboratory for Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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6
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Jannatun N, Taraqqi-A-Kamal A, Rehman R, Kuker J, Lahiri SK. A facile cross-linking approach to fabricate durable and self-healing superhydrophobic coatings of SiO2-PVA@PDMS on cotton textile. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109836] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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7
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Lahiri SK, Zhang P, Zhang C, Liu L. Robust Fluorine-Free and Self-Healing Superhydrophobic Coatings by H 3BO 3 Incorporation with SiO 2-Alkyl-Silane@PDMS on Cotton Fabric. ACS Appl Mater Interfaces 2019; 11:10262-10275. [PMID: 30761888 DOI: 10.1021/acsami.8b20651] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Limited robustness is a serious drawback for superhydrophobic coatings and degrades the performance of superhydrophobic surfaces in practical applications. Although fluororeagents have excellent durability for superhydrophobicity, their use has been restricted due to various health and environmental concerns. In this work, we describe a facile and efficient fabrication strategy for creating robust fluorine-free superhydrophobic composite coatings that are prepared by a simple dip-dry method, in which the H3BO3-incorporated SiO2-alkyl-silane coatings are deposited on woven cotton fabric surfaces followed by polydimethylsiloxane modification. The coated surface shows a large water contact angle of 157.95 ± 2° and a small sliding hysteresis angle (SHA) of 3.8 ± 0.6°, demonstrating excellent superhydrophobicity. The coated fabric surface also exhibited robustness and durability, withstanding a tape-peeling test (under 48.05 kPa) for around 80 repetitions and sandpaper rubbing (loaded 100 g) for 40 cycles. Furthermore, the coated fabric surface displayed self-healing and oil-water separation capacities. The developed superhydrophobic coatings in this study are robust, environmentally benign, and easy to fabricate, showing promising applications in textile industries.
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Affiliation(s)
- Sudip Kumar Lahiri
- School of Materials Science and Engineering and State Key Laboratory for Materials Processing and Die & Mould Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Pengcheng Zhang
- School of Materials Science and Engineering and State Key Laboratory for Materials Processing and Die & Mould Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Cheng Zhang
- School of Materials Science and Engineering and State Key Laboratory for Materials Processing and Die & Mould Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Lin Liu
- School of Materials Science and Engineering and State Key Laboratory for Materials Processing and Die & Mould Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
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8
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Chiang DY, Alsina KM, Corradini E, Fitzpatrick M, Ni L, Reynolds J, Lahiri SK, Scott L, Heck AJR, Wehrens XHT. P304Reprogramming of the protein phosphatase 1 interactome during heart failure progression. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- D Y Chiang
- Brigham and Women's Hospital, Medicine, Boston, United States of America
| | - K M Alsina
- Baylor College of Medicine, Houston, United States of America
| | | | | | - L Ni
- Baylor College of Medicine, Houston, United States of America
| | - J Reynolds
- Baylor College of Medicine, Houston, United States of America
| | - S K Lahiri
- Baylor College of Medicine, Houston, United States of America
| | - L Scott
- Baylor College of Medicine, Houston, United States of America
| | - AJR Heck
- Utrecht University, Utrecht, Netherlands
| | - XHT Wehrens
- Baylor College of Medicine, Houston, United States of America
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9
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Li T, Lu H, Shen C, Lahiri SK, Wason MS, Mukherjee D, Yu L, Zhao J. Identification of epithelial stromal interaction 1 as a novel effector downstream of Krüppel-like factor 8 in breast cancer invasion and metastasis. Oncogene 2013; 33:4746-55. [PMID: 24096480 PMCID: PMC3979502 DOI: 10.1038/onc.2013.415] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 08/08/2013] [Accepted: 08/15/2013] [Indexed: 12/17/2022]
Abstract
Krüppel-like factor 8 (KLF8) is a transcriptional factor critical for metastatic progression of breast cancer. Epithelial stromal interaction 1 (EPSTI1), a recently identified stromal fibroblast-induced gene in non-invasive breast cancer cells is highly overexpressed in invasive breast carcinomas. The function and regulation of EPSTI1, however, remain largely unknown. In this paper, we report a novel KLF8 to EPSTI1 signaling pathway in breast cancer. Using various expression analyses, we revealed a high co-overexpression of KLF8 and EPSTI1 in invasive human breast cancer cells and patient tumors. Ectopic overexpression of KLF8 in the non-invasive, MCF-10A cells induced the EPSTI1 expression, whereas KLF8 knockdown from the invasive, MDA-MB-231 cells decreased the EPSTI1 expression. Promoter activation and binding analyses indicated that KLF8 promoted the EPSTI1 expression by directly acting on the EPSTI1 gene promoter. EPSTI1 knockdown dramatically reduced the KLF8-promoted MCF-10A cell invasion and ectopic expression of EPSTI1 in the non-invasive, MCF-7 cells is sufficient to induce the cell invasion. Experiments using nude mice demonstrated that the ectopic EPSTI1 granted the MCF-7 cells capability of both invasive growth in the breasts and metastasis to the lungs. Using co-immunoprecipitation coupled with mass spectrometry, we discovered that EPSTI1 interacts with the valosin containing protein (VCP), resulting in the degradation of IκBα and subsequent activation of NF-κB in the nucleus. These findings suggest a novel KLF8 to EPSTI1 to VCP to NF-κB signaling mechanism potentially critical for breast cancer invasion and metastasis.
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Affiliation(s)
- T Li
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine, Orlando, FL, USA
| | - H Lu
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine, Orlando, FL, USA
| | - C Shen
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine, Orlando, FL, USA
| | - S K Lahiri
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine, Orlando, FL, USA
| | - M S Wason
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine, Orlando, FL, USA
| | - D Mukherjee
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine, Orlando, FL, USA
| | - L Yu
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine, Orlando, FL, USA
| | - J Zhao
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine, Orlando, FL, USA
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10
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Lu H, Hu L, Yu L, Wang X, Urvalek AM, Li T, Shen C, Mukherjee D, Lahiri SK, Wason MS, Zhao J. KLF8 and FAK cooperatively enrich the active MMP14 on the cell surface required for the metastatic progression of breast cancer. Oncogene 2013; 33:2909-17. [PMID: 23812425 PMCID: PMC3929536 DOI: 10.1038/onc.2013.247] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2013] [Revised: 04/24/2013] [Accepted: 05/19/2013] [Indexed: 12/13/2022]
Abstract
Krüppel-like factor 8 (KLF8) regulates critical gene transcription associated with cancer. The underlying mechanisms, however, remain largely unidentified. We have recently demonstrated that KLF8 expression enhances the activity but not expression of matrix metalloproteinase-2 (MMP2), the target substrate of MMP14. Here, we report a novel KLF8 to MMP14 signaling that promotes human breast cancer invasion and metastasis. Using cell lines for inducible expression and knockdown of KLF8, we demonstrate that KLF8 promotes MMP14 expression at the transcriptional level. Knocking down KLF8 expression inhibited the breast cancer cell invasion both in vitro and in vivo as well as the lung metastasis in mice, which could be rescued by ectopic expression of MMP14. Promoter reporter assays and oligonucleotide and chromatin immunoprecipitations determined that KLF8 activates the human MMP14 gene promoter by both directly acting on the promoter and indirectly via promoting the nuclear translocation of β-catenin, the expression of T-cell factor-1 (TCF1) and subsequent activation of the promoter by the β-catenin/TCF1 complex. Inhibition of focal adhesion kinase (FAK) using pharmacological inhibitor, RNA interference or knockout showed that the cell surface presentation of active MMP14 downstream of KLF8 depends on FAK expression and activity. Taken together, this work identified novel signaling mechanisms by which KLF8 and FAK work together to promote the extracellular activity of MMP14 critical for breast cancer metastasis.
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Affiliation(s)
- H Lu
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
| | - L Hu
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
| | - L Yu
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
| | - X Wang
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
| | - A M Urvalek
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
| | - T Li
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
| | - C Shen
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
| | - D Mukherjee
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
| | - S K Lahiri
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
| | - M S Wason
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
| | - J Zhao
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
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Lahiri SK, Haldar D, Chowdhury SP, Sarkar GN, Bhadury S, Datta UK. Junctures to the therapeutic goal of diabetes mellitus: Experience in a tertiary care hospital of Kolkata. J Midlife Health 2011; 2:31-6. [PMID: 21897737 PMCID: PMC3156499 DOI: 10.4103/0976-7800.83271] [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: 11/12/2022] Open
Abstract
Introduction: The World Health Organization has declared India as the “diabetic capital” of the world. In controlling of such chronic, mostly asymptomatic disease, patients’ role can’t be overemphasized. Aims: To assess the level of compliance to anti-diabetic therapies and to ascertain the determinants of non-compliance, if any. Materials and Methods: A cross-sectional observational study was conducted for 3 months in a diabetic clinic of R G Kar Medical College and Hospital, Kolkata. Data were collected by interviewing the patients, examining their prescriptions and laboratory reports and anthropometry after obtaining informed consent. Results: Blood report at the point of data collection revealed controlled glucose homeostasis in 38.93% patients but evaluation of past 3 months report showed only 24.3% had control over hyperglycemia. Glycemic control was seen to be positively related to short duration of disease, compliance to therapies, and high knowledge about diabetes. Compliance to therapies found in 32.22% of study subjects was in turn associated with short duration of disease. House-wives showed poor compliance; insulin treatment with or without oral-anti-diabetic agent showed better compliance. Knowledge of diabetes was significantly high among higher educated; poor among women, house-wives, and rural people. Conclusion: Patient-providers collaboration is to be developed through a patient-centered care model based on the mutual responsibility of both so that each patient is considered in the mesh of his/her other goals of life and helped to promote empowerment to take informed decision for behavioral change conducive to control the disease.
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Affiliation(s)
- S K Lahiri
- Department of Community Medicine, RG Kar Medical College, Kolkata, India
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12
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Abstract
BACKGROUND Age-old practice "using tobacco" is a well known major global concern as it victimizes all its lovers by a host of chronic noncommunicable diseases including cancer; all develop very slowly and silently, and can cause premature death. OBJECTIVES To assess the pattern of tobacco use among the medical and nonmedical college students. MATERIALS AND METHODS A cross-sectional descriptive study was carried out in Kolkata collecting anonymous data from 515 medical and 349 nonmedical college students of two medical and two general colleges, selected randomly. RESULT Overall prevalence of tobacco use (18.3% vs 43.6%) and smoking (14.9% vs 40.7%) were significantly less in medical subjects, both across the sex and years of study. Lower rate of tobacco adoption at college level, higher quitting rate, correct knowledge regarding uselessness of filter attached with cigarette, and ill-effects of tobacco consumption were observed among medical participants. More nonmedical subjects were increasingly smoking compared to medical students. Filter-tipped cigarette was the top choice, and smoking was more prevalent mode of use among the nonmedical participants, most (62.3%) of whom were mild users. Curiosity was the top influencing factor for the initiation of tobacco use and two-third users wanted to quit. CONCLUSION Although the mortal habits was comparatively less among medical students, the medical environment seemed to fail to curb the dreadful practice totally. Thereby it can be recommended that active behavior-changing communication is required for all sections of the society to tear out the social root of the problem instead of unimpressive vague health warnings in vogue.
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Affiliation(s)
- T Chatterjee
- Department of Community Medicine and Paediatrics, BMC, Burdan, India
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13
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Karmakar PR, Mitra K, Chatterjee A, Jana PK, Bhattacharya S, Lahiri SK. A study on coverage, compliance and awareness about mass drug administration for elimination of lymphatic filariasis in a district of West Bengal, India. J Vector Borne Dis 2011; 48:101-104. [PMID: 21715733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Affiliation(s)
- P Ray Karmakar
- Department of Community Medicine, R.G. Kar Medical College, Kolkata, India.
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Bhattacharyya S, Mukhopadhyay M, Bhattacharyya I, Lahiri SK, Mitra PK, Dutta UK. A study on body mass index (BMI) and some biochemical parameters of the medicos with family history of diabetes mellitus, hypertension and coronary heart disease. J Indian Med Assoc 2007; 105:370, 372, 374 passim. [PMID: 18178989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Increasing prevalence of diabetes mellitus (DM), hypertension (HT), coronary heart disease (CHD) is alarming; risk factors are fairly stable, passing fairly well from childhood to adulthood; genetic factors play a role. This is important to know the status of some biochemical parameters viz, fasting plasma glucose level, fasting serum insulin (FI), serum triglyceride (STG), total cholesterol (TC), low density lipoprotein (LDL), high density lipoprotein (HDL) among the medicos with family history (FH) of DM, HT or CHD and the relationship of biochemical parameters with body mass index (BMI). Mean age of the sample (n=67) was 22 years with 76.12% males and 23.88% females; 44.78%, 29.85% and 19.40% had FH of DM, HT and CHD respectively; 8.96% had the FH of three diseases. High BMI was seen in 62.69% cases; it was significantly high among those with FH of DM (p<0.05) but not significant against HT (p>0.05) or CHD (p>0.05). All had normal fasting plasma glucose level. Positive association existed (a) between BMI with FI, LDL and HDL, FI with LDL and HDL, TG with TC, TC with LDL and HDL, LDL with HDL among those with FH of DM; (b) between BMI with FI, STG and HDL, FI with LDL and HDL, TC with LDL and HDL, LDL with HDL among those with FH of HT; (c) between BMI with FI, STG and HDL, FI with TC, LDL and HDL, TC with LDL and HDL, LDL with HDL among those with FH of CHD. Multiple correlation coefficients (R) also indicated moderate association.
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Raychaudhuri A, Lahiri SK, Bandyopadhyay M, Foster PJ, Reeves BC, Johnson GJ. A population based survey of the prevalence and types of glaucoma in rural West Bengal: the West Bengal Glaucoma Study. Br J Ophthalmol 2006; 89:1559-64. [PMID: 16299129 PMCID: PMC1772964 DOI: 10.1136/bjo.2005.074948] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [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: 10/25/2022]
Abstract
AIM To determine (i) the prevalence of glaucoma in people aged > or =50 years, (ii) the proportions of different types of glaucoma, (iii) the distributions of intraocular pressure and vertical cup disc ratio. METHOD Population based prevalence survey in rural West Bengal. People aged > or =50 years in randomly selected villages in 24 Parganas South district. The main outcome measures were diagnosis of glaucoma, based on criteria described by the International Society for Geographic and Epidemiological Ophthalmology. RESULTS 1594 people aged > or =50 years were enumerated in nine villages; 1324 (83.1%) were surveyed and 1269 people adequately examined. 42 definite cases of glaucoma were identified, with prevalence increasing from 2.7% (95% CI 1.7 to 3.7) in people aged 50-59 years to 6.5% (95% CI 0.0 to 14.1) in those aged > or =80 years. The age standardised estimate for the prevalence of all glaucoma in people aged > or =50 years was 3.4%. Only three cases of primary angle closure glaucoma (PACG) were identified, giving a crude ratio of primary open angle glaucoma (POAG) to PACG of more than 10:1. Three people with glaucoma were blind in one eye but none was blind in both eyes. CONCLUSION Compared to other surveys of glaucoma in India, the age standardised prevalence observed was less than in Hyderabad, but similar to Tamil Nadu and Dhaka. The ratio of POAG to PACG was much higher than found previously, suggesting that PACG may be less prevalent in Bengalis than in Indian populations living in south India. The authors conclude that ophthalmic services in West Bengal should focus on detecting POAG. Since there is still no satisfactory method of screening for POAG, there is no alternative to case detection (opportunistic screening) in eye clinics.
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Affiliation(s)
- A Raychaudhuri
- Department of Public Health and Policy, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK.
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Bhattacharya RN, Shrivastava P, Sadhukhan SK, Lahiri SK, Chakravorty M, Saha JB. P.C. Sen Memorial best paper award on rural health practice: A study on visual acuity and vitamin A deficiency among primary school students in Naxalbari Village, Darjeeling district of West Bengal. Indian J Public Health 2004; 48:171-80. [PMID: 15709575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
Abstract
331 primary school students studying from Nursery classes to Class IV in 2 randomly selected schools in Naxalbari Village in Darjeeling district of West Bengal were tested for visual acuity (VA), Vitamin A deficiency (VAD) and Bitot's spot. 329 students could be tested for visual acuity whereas all 331 students were tested for VAD and Bitot's spot. The prevalence of abnormal Visual Acuity (VA) (VA < 6/9 in any eye) in this study group was 3.65% and it was highest in 7-8 years age group in both the sexes contributing to 75% of the total students having abnormal VA. All these children fell within 50th percentile of weight and height for their respective age and sex. Hindu & ST children accounted for 91.67% & 50% abnormal VA respectively; however, when presence of abnormal VA was compared with its absence between 2 sexes, Hindu and Muslim students and in different castes, no statistically significant differences were found (p > .05). Students of Class-I and Class-II contributed 25% and 50% respectively and together accounted for 75% of abnormal VA. Prevalence of VAD was 8.16%. Among sufferers of VAD Hindus (81.48%) and ST (51.85%) were the main contributors; the differences between presence and absence of VAD in 2 sexes, among 3 religious groups were not statistically significant (p > .05); however, differences among ST and NonSCST groups, and again SC, ST and Non-SCST groups were statistically significant (p < .05). Prevalence of Bitot's spot was 3.63%. Among the students having Bitot's spot, females (58.33%) outnumber the males (41.67%); but the difference between presence and absence of Bitot's spot in 2 sexes was not statistically significant (p > .05). 83.33% each of Hindus and STs had Bitot's spot. No SC and no Muslim student had this spot; the differences between presence and absence of Bitot's spot between Hindu and Christian students were statistically significant (p < .01); similarly when the findings were considered between ST and NonSCST students the difference was found to be statistically highly significant (p < .001).
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Affiliation(s)
- R N Bhattacharya
- Dept. of Community Medicine, N.B. Medical College, Sushruta Nagar, Darjeeling, West Bengal
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Thapa V, Saha JB, Lahiri SK, Sarkar GN. An evaluation of bed management in a rural hospital adjacent to Indo-Nepal border in West Bengal. Indian J Public Health 2002; 46:57-60. [PMID: 12653003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023] Open
Abstract
Bed management is one of the important activities for efficient hospital management. The present study on evaluation of bed management in a rural hospital revealed that the total bed capacity could not be utilised. The turnover rate, turnover interval, bed occupancy rate and average length of stay were closely corroborating.
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Lahiri SK, Sarkar GN, Datta TK, Biswas PK, Pramanik RN, Giri A. Rural people and fine needle aspiration cytology (FNAC)--some findings in North Bengal Medical College, Darjeeling, West Bengal. Indian J Public Health 2001; 45:43-50. [PMID: 11917323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
A hospital based interdepartmental collaborative study was carried out from 1st July to 30th September, 2000 on 269 rural people residing in six districts of the northern part of West Bengal and attending the Pathology Department in North Bengal Medical College for Fine Needle Aspiration Cytology (FNAC) after being referred from different clinical departments. The objectives of the study were to study some aspects of the outcomes of FNAC among rural people and to suggest for its wider application in rural community through Community Health Centre/Rural Hospital/Block Primary Health Centre. The results shows that Hindus (80.3%) are attending more in number than Muslims (14.13%), Christians (4.83%) and Buddhist (0.74%); 53.54% of the population are in 11-40 years age group. In benign conditions 76.95% are coming from up to 100 kms. of N.B.M.C; people in lower per capita income group of up to Rs.400/- per month are attending twice in number than those in the income groups of Rs.401/- and more per month. In malignancy however people do not think of distance or expenses due to seriousness of the diseases. In 14.5% cases FNAC remains inconclusive whereas in 85.5% cases it provides definite diagnoses.
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Affiliation(s)
- S K Lahiri
- Deptt. of Community Medicine, N. B. Medical College, Darjeeling
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Ray SK, Biswas R, Kumar S, Chatterjee T, Misra R, Lahiri SK. Reproductive health needs and care seeking behaviour of pavement dwellers of Calcutta. J Indian Med Assoc 2001; 99:142-3, 145. [PMID: 11478757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
An unabated growth of street dwellers in the city of Calcutta is reported to be due to twin reasons like, migration of rural poor people as well as uncontrolled fertility among these poor settlers of the city. A community-based study on reproductive health, fertility and related care seeking behaviour was studied among a sample of women of child bearing age living on streets of Calcutta. Besides, the quite common conditions like leucorrhoea (28.5%), menstrual irregularities (12.3%), infertility (2.5%) and STDs (1.3%) were also reported. But most of these illnesses (three-fourth) were uncared for, and the remaining one-fourth sought treatment from govemment institutions, private agencies or even from untrained practitioners (quacks). The reproductive behaviour of street dwelling women was characterised by early marriage, teenage pregnancies, and scarce use of contraceptives (32%) as well as frequent abortions (2.8%). Very few pregnant women received adequate antenatal care (3.8%). Coverage of tetanus toxoid immunisation (68.5%) and proper iron and folic acid supplementation (16.7%) were also poor. Whereas, antenatal care was received mostly from government health institutions (71%), home delivery (ie, on street) was a common practice and conducted mostly by untrained birth attendants (51.8%).
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Affiliation(s)
- S K Ray
- Department of Community Medicine, Medical College, Calcutta
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Kulkarni RG, Lahiri SK. Improved sidelobe performance of cosine series functions. IEEE Trans Ultrason Ferroelectr Freq Control 1999; 46:464-466. [PMID: 18238444 DOI: 10.1109/58.753036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The cosine series functions are used extensively for SAW filter design with noniterative techniques. This paper presents improved sidelobe levels of these functions by rigorous application of criteria for minimising the sidelobe peaks. An improvement of 2 dB in sidelobe levels is achieved with respect to the earlier results. A new approach is presented to determine the coefficients of these functions uniquely, which reduces the number of simultaneous equations to be solved to N-1 compared to N equations required to be solved in the earlier method.
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Lahiri SK, Mukhopadhyay SP, Das KK, Ray SK, Biswas D. Study of the impact of epidemiological factors on intelligence of rural children of 3 to 6 years age group belonging to low socio-economic status. Indian J Public Health 1994; 38:133-42. [PMID: 7797312] [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] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
There are many factors which affect intelligence as well as physical growth of children, although genetic factor plays a prime role but social, environmental and psychological factors influence significantly the physical growth and intelligence of the child and the same can be improved through intervention. Community based studies are therefore useful to understand effect of these factors for future planning. The present study was therefore undertaken in Burdwan district of West Bengal with the objectives of studying level of intelligence of children of 3 to 6 years age group and impact of the factors related to the level of intelligence of these children. 72 children of 3 to 6 years age group were studied, of which 2/3 were either normal or having Grade-I undernutrition and the rest were either Grade-II or Grade-III. A significant positive association was found between DST IQ score (Bharat Raj) and the nutritional grade. Non-formal education also was found to have significant bearing on the IQ level. No significant relationship was however found between DST IQ score and the religion indicating culture independence of the scoring system.
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Affiliation(s)
- S K Lahiri
- Dept. of Community Medicine, Medical College, Calcutta
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Lahiri SK, Ackroyd CE. Postoperative pain relief; a new approach: narcotics compared with non-steroidal anti-inflammatory drugs. Ann R Coll Surg Engl 1990; 72:66. [PMID: 19311272 PMCID: PMC2499099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
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Ray SK, Dey AK, Haque MA, Lahiri SK, Lahiri A, Banerjee A. Symptomatic profile of intestinal parasitic infections in the hostels of a medical college. J Commun Dis 1989; 21:81-4. [PMID: 2809143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Mandal P, Poddar A, Das AN, Chakraborty A, Ghosh B, Choudhury P, Lahiri SK. Magnetoresistance and thermoelectric power of the Bi-Sr-Ca-Cu-O system. Phys Rev B Condens Matter 1988; 38:9205-9208. [PMID: 9945713 DOI: 10.1103/physrevb.38.9205] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Dunnett IA, Goodman NW, Hall CR, Lahiri SK, McOmie H, Madden AP, Mulvein JT, Powell JN, Walsh EM. Anaesthesia, teeth, and litigation. Lancet 1987; 2:1400. [PMID: 2890983 DOI: 10.1016/s0140-6736(87)91290-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Lahiri SK. Preventing gastric regurgitation with a ballooned nasogastric tube. Ann R Coll Surg Engl 1987; 69:122-6. [PMID: 3605997 PMCID: PMC2498491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Regurgitation and aspiration of gastric contents remain a major source of morbidity and mortality in the perioperative period. A modified nasogastric tube has been designed with an integral balloon which is inflated in the stomach and impacted, by gentle traction, at the gastro-oesophageal junction, to prevent gastro-oesophageal reflux. Preliminary studies demonstrate its effectiveness in improving the competence of the gastro-oesophageal sphincter.
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Ray SK, Chatterjee R, Mandal A, Lahiri SK, Roy SC, Banerjee S. A short report of untoward reactions following administration of D.P.T. vaccine and vitamin A in an under five clinic. Indian J Public Health 1984; 28:213-6. [PMID: 6545689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Siegers MP, Feinendegen LE, Lahiri SK, Cronkite EP. Relative number and proliferation kinetics of hemopoietic stem cells in the mouse. Blood Cells 1979; 5:211-36. [PMID: 45348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A model calculation of the hemopoiesis of the mouse based on known hematologic data leads to the conclusion that approximately 3% of all nucleated bone marrow cells are stem cells (pluripotent plus committed stem cells). By a new 125IUdR labeling technique on radiation chimeras, a relative number of 2%-7% stem cells was determined. In previous studies with test systems for stem cells using colony formation in vivo or in vitro, a relative number of stem cells of at least one order of magnitude lower has been estimated. In this study the stem cells are found to have a turnover time of about 4.3 days in the donor mice. This turnover time remained unchanged even after transfusion of marrow cells into lethally irradiated recipient mice. Radiosensitivity determinations yielded a D0 of 80 rad for stem cells in S-phase and D0 of 185 rad for stem cells distributed throughout the entire cell cycle. The respective extrapolation numbers were 1.23 and 1.14. Experiments using an 3H-TdR suicide technique revealed different cell cycle parameters for bone marrow stem cells seeding to the spleens and to the femurs of lethally irradiated recipients, primarily a shortening of S-phase in cells seeding to femurs. The method described here provides a new approach to hematologic stem cell research.
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Abstract
A case of hearing deficit following nitrous oxide anaesthesia is reported. The mechanism and time course of nitrous oxide-induced intratympanic pressure changes are described and contrasted with the effects of non-nitrous oxide anaesthesia. The rate of increase is about 10 mm H20/min. The possibility that nitrous oxide may cause displacement of tympanic membrane grafts both outwards and inwards, or disrupt the reconstructed middle ear conducting mechanism, is raised again.
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Mathew T, Suri NK, Bhola SR, Suri JC, Arora RR, Lahiri SK. Serological investigations of an epidemic of fever by group B arboviruses in Jaipur (1973). Indian J Med Res 1976; 64:1136-42. [PMID: 992844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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Lahiri SK. Kinetics of haemopoietic recovery in endotoxin-treated mice. Cell Prolif 1976; 9:31-9. [PMID: 4225 DOI: 10.1111/j.1365-2184.1976.tb01251.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Kinetics of mouse spleen colony forming units were studied after intra-peritoneal injection of 1 mug/blody weight bacterial endotoxin S. typhosa. When these mice were used as unirradiated and sublethally irradiated donors, it was possible to study the effect of the endotoxin injection upon the cells. Use of the treated mice as irradiated recipients of normal cells gave information about the host effect. In treated unirradiated mice, the total nucleated cell and the CFU counts were disturbed, and 2 days later a large fraction of the CFU were found in the DNA synthesis (S) phase. This meant that injection of endotoxin generated factors affecting the kinetics of the CFU and triggering the resting CFU into the proliferative cycle. If then the mice were given supralethal irradiation and used as recipients of normal bone marrow cells, more CFU seeded to the spleen as compared to normal recipients; but the dip and the growth rate of the CFU were not changed. Hence the endotoxin-generated factors had been eliminated in 2 days. A total body sublethal irradiation by 400 rad X-ray 2 days after endotoxin injection reduced the post-irradiation dip in the recovery curve of the CFU, indicating that though the factors affecting the cell kinetics had been eliminated, the cycling CFU behaved like a growing population. During the first week, the growth rate of the CFU remained the same as in control irradiated mice. The growth rate of the spleen CFU of the endotoxin-treated mice slowed down during the second week, and their self-replicating ability was low. Fluctuations in the DNA synthesizing fraction of the spleen CFU suggested a variability in the ratio of the length of the S phase and the cell generation time.
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Abstract
Paraplegia complicating a block of the coeliac plexus with 6% aqueous phenol for carcinoma of the pancreas is described. The patient had no previous neurological abnormality and it is postulated that vascular ischaemia of the spinal cord was responsible for the sequence of neurological events.
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Lahiri SK, Boys JE. Letter: Anaesthesia for bladder inflation therapy. Br J Anaesth 1973; 45:1162. [PMID: 4787003 DOI: 10.1093/bja/45.11.1162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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Lahiri SK. Response of mouse bone marrow colony forming units in different stages of the cell cycle to in vitro incubation with mitomycin-C. Cell Tissue Kinet 1973; 6:509-14. [PMID: 4747572 DOI: 10.1111/j.1365-2184.1973.tb01638.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Lahiri SK, van Putten LM. Location of the G 0 -phase in the cell cycle of the mouse haemopoietic spleen colony forming cells. Cell Tissue Kinet 1972; 5:365-9. [PMID: 4639296 DOI: 10.1111/j.1365-2184.1972.tb00375.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Chatterjee PK, Lahiri SK, Pal RK. Cor pulmonale in chronic pulmonary tuberculosis with extensive fibrotic changes. Indian Heart J 1971; 23:265-70. [PMID: 5146620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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Lahiri SK, Udupa KB, Jamdar SC, Banerji DN. A comparison of reticulocyte pictures in rat in haemorrhage and radiophosphorus poisoning. Indian J Exp Biol 1966; 4:95-6. [PMID: 5942507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Lahiri SK, Udupa KB, Nag BD. A method for studying the maturation time of an average bone marrow cell in rat using 32 P as tracer. Indian J Exp Biol 1965; 3:149-53. [PMID: 5839774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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