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Bhattacharyya K. Of Molecules, Time, and Space Resolution: An Autobiography of Kankan Bhattacharyya. J Phys Chem B 2022; 126:3464-3469. [PMID: 35586922 DOI: 10.1021/acs.jpcb.2c02492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kankan Bhattacharyya
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India
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2
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Nandi S, Ghosh S, Bhattacharyya K. Live Cell Microscopy: A Physical Chemistry Approach. J Phys Chem B 2018; 122:3023-3036. [PMID: 29389140 DOI: 10.1021/acs.jpcb.7b11689] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Probing dynamics of intracellular components using physical chemistry techniques is a remarkable bottom-up approach for understanding the structures and functions of a biological cell. In this "Feature Article", we give an overview on local polarity, solvation, viscosity, acid-base property, red-ox processes (thiol-disulfide exchange), and gene silencing at selected intracellular components inside a live cell. Significant differences have been observed between cancer cells and their noncancer counterparts. We demonstrate that thiol-disulfide exchange, calcium oscillation, and gene silencing are manifested in time dependence of fluorescence intensity. We show that fluorescent gold nanoclusters may be used in drug delivery (e.g., doxorubicin) and selective killing of cancer cells. Further, we discuss dynamics and structural changes of DNA quadruplexes and i-motifs, induced by different external conditions (e.g., pH) and additives (e.g., K+ and other target specific small molecules). We demonstrate that peptidomimetic analogues have high specificity over double-stranded DNA for binding with i-motifs and G-quadruplexes. These results may have significant biological implications.
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Affiliation(s)
- Somen Nandi
- Department of Physical Chemistry , Indian Association for the Cultivation of Science , Jadavpur, Kolkata 700 032 , India
| | - Surajit Ghosh
- Organic & Medicinal Chemistry Division , CSIR-Indian Institute of Chemical Biology , 4, Raja S. C. Mullick Road , Jadavpur, Kolkata , 700 032 West Bengal , India.,Academy of Scientific and Innovative Research (AcSIR) , CSIR-Indian Institute of Chemical Biology Campus , 4 Raja S. C. Mullick Road , Jadavpur, Kolkata 700 032 , India
| | - Kankan Bhattacharyya
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal , 462 066 Madhya Pradesh , India
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Ghose A, Amaro M, Kovaricek P, Hof M, Sykora J. 6,7-dimethoxy-coumarin as a probe of hydration dynamics in biologically relevant systems. Methods Appl Fluoresc 2018; 6:025005. [DOI: 10.1088/2050-6120/aaaa05] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Takeuchi M, Kajimoto S, Nakabayashi T. Experimental Evaluation of the Density of Water in a Cell by Raman Microscopy. J Phys Chem Lett 2017; 8:5241-5245. [PMID: 29022721 DOI: 10.1021/acs.jpclett.7b02154] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We report direct observation of a spatial distribution of water molecules inside of a living cell using Raman images of the O-H stretching band of water. The O-H Raman intensity of the nucleus was higher than that of the cytoplasm, indicating that the water density is higher in the nucleus than that in the cytoplasm. The shape of the O-H stretching band of the nucleus differed from that of the cytoplasm but was similar to that of the balanced salt solution surrounding cells, indicating less crowded environments in the nucleus. The concentration of biomolecules having C-H bonds was also estimated to be lower in the nucleus than that in the cytoplasm. These results indicate that the nucleus is less crowded with biomolecules than the cytoplasm.
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Affiliation(s)
- Mizuki Takeuchi
- Graduate School of Pharmaceutical Sciences, Tohoku University , Aoba-ku, Sendai 980-8578, Japan
| | - Shinji Kajimoto
- Graduate School of Pharmaceutical Sciences, Tohoku University , Aoba-ku, Sendai 980-8578, Japan
| | - Takakazu Nakabayashi
- Graduate School of Pharmaceutical Sciences, Tohoku University , Aoba-ku, Sendai 980-8578, Japan
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Chattoraj S, Saha S, Halder D, Jana SS, Bhattacharyya K. Structural Oscillations of Non-muscle Myosin II-C2: Time Resolved Confocal Microscopy. ChemistrySelect 2017. [DOI: 10.1002/slct.201601963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shyamtanu Chattoraj
- Department of Physical Chemistry; Indian Association for the Cultivation of Science; Jadavpur; Kolkata-32 INDIA
| | - Shekhar Saha
- Department of Biological Chemistry; Indian Association for the Cultivation of Science; Jadavpur; Kolkata-32 INDIA
- Department of Biochemistry and Molecular Genetics; University of Virginia; Charlottesville, VA USA
| | - Debdatta Halder
- Department of Biological Chemistry; Indian Association for the Cultivation of Science; Jadavpur; Kolkata-32 INDIA
| | - Siddhartha S. Jana
- Department of Biological Chemistry; Indian Association for the Cultivation of Science; Jadavpur; Kolkata-32 INDIA
| | - Kankan Bhattacharyya
- Department of Physical Chemistry; Indian Association for the Cultivation of Science; Jadavpur; Kolkata-32 INDIA
- Department of Chemistry; Indian Institute of Science Education and Research (IISER); Bhopal, Madhya Pradesh 462030 INDIA
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Amin MA, Nandi S, Mondal P, Mahata T, Ghosh S, Bhattacharyya K. Physical chemistry in a single live cell: confocal microscopy. Phys Chem Chem Phys 2017; 19:12620-12627. [DOI: 10.1039/c7cp02228j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A confocal microscope can be used to differentiate between cancer and non-cancer cells, and to enrich our knowledge of 3D tumor spheroids and drug delivery.
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Affiliation(s)
- Md. Asif Amin
- Department of Physical Chemistry
- Indian Association for the Cultivation of Science (IACS)
- Jadavpur
- India
| | - Somen Nandi
- Department of Physical Chemistry
- Indian Association for the Cultivation of Science (IACS)
- Jadavpur
- India
| | - Prasenjit Mondal
- Organic and Medicinal Chemistry Division
- Indian Institute of Chemical Biology
- Jadavpur
- India
| | - Tanushree Mahata
- Organic and Medicinal Chemistry Division
- Indian Institute of Chemical Biology
- Jadavpur
- India
| | - Surajit Ghosh
- Organic and Medicinal Chemistry Division
- Indian Institute of Chemical Biology
- Jadavpur
- India
| | - Kankan Bhattacharyya
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhauri
- India
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CHATTORAJ SHYAMTANU, BHATTACHARYYA KANKAN. Spatial inhomogeneity in spectra and exciton dynamics in porphyrin micro-rods and micro-brushes: Confocal microscopy. J CHEM SCI 2016. [DOI: 10.1007/s12039-016-1155-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Chattoraj S, Bhattacharyya K. Biological oscillations: Fluorescence monitoring by confocal microscopy. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.07.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Ghosh S, Nandi S, Ghosh C, Bhattacharyya K. Fluorescence Dynamics in the Endoplasmic Reticulum of a Live Cell: Time-Resolved Confocal Microscopy. Chemphyschem 2016; 17:2818-23. [PMID: 27245117 DOI: 10.1002/cphc.201600425] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Indexed: 11/11/2022]
Abstract
Fluorescence dynamics in the endoplasmic reticulum (ER) of a live non-cancer lung cell (WI38) and a lung cancer cell (A549) are studied by using time-resolved confocal microscopy. To selectively study the organelle, ER, we have used an ER-Tracker dye. From the emission maximum (λmaxem) of the ER-Tracker dye, polarity (i.e. dielectric constant, ϵ) in the ER region of the cells (≈500 nm in WI38 and ≈510 nm in A549) is estimated to be similar to that of chloroform (λmaxem =506 nm, ϵ≈5). The red shift by 10 nm in λmaxem in the cancer cell (A549) suggests a slightly higher polarity compared to the non-cancer cell (WI38). The fluorescence intensity of the ER-Tracker dye exhibits prolonged intermittent oscillations on a timescale of 2-6 seconds for the cancer cell (A549). For the non-cancer cell (WI38), such fluorescence oscillations are much less prominent. The marked fluorescence intensity oscillations in the cancer cell are attributed to enhanced calcium oscillations. The average solvent relaxation time (<τs >) of the ER region in the lung cancer cell (A549, 250±50 ps) is about four times faster than that in the non-cancer cell (WI38, 1000±50 ps).
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Affiliation(s)
- Shirsendu Ghosh
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700 032, India), Fax: (91)-33-2473-2805
| | - Somen Nandi
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700 032, India), Fax: (91)-33-2473-2805
| | - Catherine Ghosh
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700 032, India), Fax: (91)-33-2473-2805
| | - Kankan Bhattacharyya
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700 032, India), Fax: (91)-33-2473-2805.
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Ghosh C, Bhunia D, Ghosh S, Jana B, Ghosh S, Bhattacharyya K. Fluorescence Probing of Fluctuating Microtubule using a Covalent Fluorescent Probe: Effect of Taxol. ChemistrySelect 2016. [DOI: 10.1002/slct.201600353] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Catherine Ghosh
- Department of Physical Chemistry; Indian Association for the Cultivation of Science; Jadavpur Kolkata- 700032 India
| | - Debmalya Bhunia
- Organic & Medicinal Chemistry Division; CSIR-Indian Institute of Chemical Biology; Jadavpur Kolkata- 700032 India
| | - Shirsendu Ghosh
- Department of Physical Chemistry; Indian Association for the Cultivation of Science; Jadavpur Kolkata- 700032 India
| | - Batakrishna Jana
- Organic & Medicinal Chemistry Division; CSIR-Indian Institute of Chemical Biology; Jadavpur Kolkata- 700032 India
| | - Surajit Ghosh
- Organic & Medicinal Chemistry Division; CSIR-Indian Institute of Chemical Biology; Jadavpur Kolkata- 700032 India
| | - Kankan Bhattacharyya
- Department of Physical Chemistry; Indian Association for the Cultivation of Science; Jadavpur Kolkata- 700032 India
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Chattoraj S, Amin MA, Bhattacharyya K. Cytochrome c-Capped Fluorescent Gold Nanoclusters: Imaging of Live Cells and Delivery of Cytochrome c. Chemphyschem 2016; 17:2088-95. [PMID: 27028215 DOI: 10.1002/cphc.201501163] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Indexed: 01/09/2023]
Abstract
Cytochrome c-capped fluorescent gold nanoclusters (Au-NCs) are used for imaging of live lung and breast cells. Delivery of cytochrome c inside the cells is confirmed by covalently attaching a fluorophore (Alexa Fluor 594) to cytochrome c-capped Au-NCs and observing fluorescence from Alexa 594 inside the cell. Mass spectrometry studies suggest that in bulk water, addition of glutathione (GSH) to cytochrome c-capped Au-NCs results in the formation of glutathione-capped Au-NCs and free apo-cytochrome c. Thus glutathione displaces cytochrome c as a capping agent. Using confocal microscopy, the emission spectra and decay of Au-NCs are measured in live cells. From the position of the emission maximum it is shown that the Au-NCs exist as Au8 in bulk water and as Au13 inside the cells. Fluorescence resonance energy transfer from cytochrome c-Au-NC (donor) to Mitotracker Orange (acceptor) indicates that the Au-NCs localise in the mitochondria of live cells.
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Affiliation(s)
- Shyamtanu Chattoraj
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700 032, India), Fax: (91)-33-2473-2805
| | - Md Asif Amin
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700 032, India), Fax: (91)-33-2473-2805
| | - Kankan Bhattacharyya
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700 032, India), Fax: (91)-33-2473-2805.
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12
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Chowdhury R, Nandi S, Halder R, Jana B, Bhattacharyya K. Structural relaxation of acridine orange dimer in bulk water and inside a single live lung cell. J Chem Phys 2016; 144:065101. [DOI: 10.1063/1.4941415] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- Rajdeep Chowdhury
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Somen Nandi
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Ritaban Halder
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Biman Jana
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Kankan Bhattacharyya
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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13
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Reddy G U, A AH, Ali F, Taye N, Chattopadhyay S, Das A. FRET-Based Probe for Monitoring pH Changes in Lipid-Dense Region of Hct116 Cells. Org Lett 2015; 17:5532-5. [DOI: 10.1021/acs.orglett.5b02568] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Upendar Reddy G
- Organic
Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
| | - Anila H. A
- Organic
Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
| | - Firoj Ali
- Organic
Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
| | - Nandaraj Taye
- Chromatin
and Disease Biology Laboratory, National Centre for Cell Science, Pune 411007, India
| | - Samit Chattopadhyay
- Chromatin
and Disease Biology Laboratory, National Centre for Cell Science, Pune 411007, India
| | - Amitava Das
- Organic
Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
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14
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Chowdhury R, Amin MA, Bhattacharyya K. Intermittent Fluorescence Oscillations in Lipid Droplets in a Live Normal and Lung Cancer Cell: Time-Resolved Confocal Microscopy. J Phys Chem B 2015; 119:10868-75. [DOI: 10.1021/jp5120042] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Rajdeep Chowdhury
- Department of Physical
Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Md. Asif Amin
- Department of Physical
Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Kankan Bhattacharyya
- Department of Physical
Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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