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Saha M, Mandal S, Sarkar S, Biswas A, Ghati A, Cordes DB, Slawin AMZ, Saha NC. Anticancer, antimicrobial and photocatalytic activities of a new pyrazole containing thiosemicarbazone ligand and its Co(III) and Ni(II) complexes: Synthesis, spectroscopic characterization and X-ray crystallography. J Inorg Biochem 2024; 257:112577. [PMID: 38714060 DOI: 10.1016/j.jinorgbio.2024.112577] [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: 12/23/2023] [Revised: 03/28/2024] [Accepted: 04/23/2024] [Indexed: 05/09/2024]
Abstract
A new pyrazole based thiosemicarbazone ligand, 5-methyl-3-formylpyrazole-N(4)-isopropylthiosemicarbazone, (HMPzNHPri) (compound I), and its cobalt(III) and nickel(II) complexes, [Co(MPzNHPri)2]Cl (compound II) and [Ni(HMPzNHPri)2]Br2 (compound III), respectively, have been synthesized and characterized through various physico-chemical and spectroscopic studies. Both the reported Co(III) and Ni(II) complexes are cationic in nature and behave as 1:1 and 1:2 electrolytes in MeOH, respectively. Electronic spectral features of the complexes have classified them as distorted octahedral ones. IR spectral data (4000-450 cm-1) have suggested a monoprotic tridentate (NNS) function of compound I coordinating to the Co(III) ion via the pyrazolyl (tertiary) ring nitrogen, azomethine nitrogen and thiolato sulphur atom; while for compound III, compound I has been found to act as neutral NNS tridentate one, coordinating to Ni(II) via the pyrazolyl iminic nitrogen, azomethine nitrogen and thioketo sulphur. Structural features of all the compounds are confirmed by the single crystal X-ray data. All the compounds reported here have been found to exhibit significant photocatalytic activity towards degradation of Methylene Blue (MB) under UV radiation. Anticancer activity of all the three compounds against cancer cell lines (HeLa and A549) and a normal cell line (HEK293) have been investigated. Compound II has been found to be more efficient against the human cervical cancer cell (HeLa) and the lung cancer cell (A549) than compounds I and III. The ligand and both the complexes display potential activities against both gram-positive (Bacillus subtilis MTCC 7193) and gram-negative bacteria (E. coli MTCC 1610).
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Affiliation(s)
- Manan Saha
- Inorganic Chemistry Section, Department of Chemistry, University of Kalyani, 741235 Nadia, West Bengal, India; Government General Degree College, Chapra, Sikra, Padmamala, 741123 Nadia, West Bengal, India
| | - Suman Mandal
- Inorganic Chemistry Section, Department of Chemistry, University of Kalyani, 741235 Nadia, West Bengal, India
| | - Solanki Sarkar
- Cell & Molecular Biology Laboratory, Department of Zoology, University of Kalyani, 741235 Nadia, West Bengal, India
| | - Arunima Biswas
- Cell & Molecular Biology Laboratory, Department of Zoology, University of Kalyani, 741235 Nadia, West Bengal, India
| | - Amit Ghati
- Department of Microbiology, Barrackpore Rastraguru Surendranath College, 700120, West Bengal, India
| | - David B Cordes
- School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, UK
| | - Alexandra M Z Slawin
- School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, UK
| | - Nitis Chandra Saha
- Inorganic Chemistry Section, Department of Chemistry, University of Kalyani, 741235 Nadia, West Bengal, India.
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Biswas A, Rao PD, Madhavan S, Natarajan M, Solomon JM. Video parameters for action observation training in stroke rehabilitation: a scoping review. Disabil Rehabil 2024; 46:1256-1265. [PMID: 37021345 DOI: 10.1080/09638288.2023.2191016] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 03/08/2023] [Indexed: 04/07/2023]
Abstract
PURPOSE Action observation training (AOT) is a therapeutic approach used in stroke rehabilitation. Videos form the core of AOT, and knowledge of constituent parameters is essential to make the intervention robust and generalizable. Currently, there is a dearth of available information on video parameters to be used for AOT. Our purpose was to identify and describe the parameters that constitute AOT videos for stroke rehabilitation. METHOD Electronic databases like PubMed, CINAHL, Scopus, Web of Science, ProQuest, and Ovid SP from inception to date according to PRISMA-ScR guidelines. Title, abstract, and full-text screening were done independently by two authors, with a third author for conflict resolution. Data on video parameters like length, quality, perspective, speed, screen size and distance, sound, and control videos were extracted. RESULTS Seventy studies were included in this review. The most-reported parameters were video length (85.71%) and perspective of view (62.85%). Movement speed (7.14%) and sound (8.57%) were the least reported. Static landscapes or geometrical patterns were found suitable as control videos. CONCLUSION Most video parameters except for length and perspective of view remain underreported in AOT protocols. Future studies with better descriptions of video parameters are required for comprehensive AOT interventions and result generalisation.
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Affiliation(s)
- Arunima Biswas
- Department of Physiotherapy, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, India
| | - Prajna D Rao
- College of Physiotherapy, Srinivas University, Mangalore, India
| | - Sangeetha Madhavan
- Department of Physical Therapy, University of Illinois, Chicago, IL, USA
| | - Manikandan Natarajan
- Department of Physiotherapy, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, India
- Centre for Comprehensive Stroke Rehabilitation and Research, Manipal Academy of Higher Education, Manipal, India
| | - John M Solomon
- Department of Physiotherapy, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, India
- Centre for Comprehensive Stroke Rehabilitation and Research, Manipal Academy of Higher Education, Manipal, India
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Lahiri D, Krishna KVM, Verma AK, Modak P, Vishwanadh B, Chattopadhyay S, Shibata T, Sharma SK, Sarkar SK, Clifton PH, Biswas A, Garg N, K Dey G. Comprehensive characterization of the structure of Zr-based metallic glasses. Sci Rep 2024; 14:4911. [PMID: 38418473 PMCID: PMC10902397 DOI: 10.1038/s41598-024-53509-y] [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: 12/08/2022] [Accepted: 02/01/2024] [Indexed: 03/01/2024] Open
Abstract
Structure of metallic glasses fascinates as the generic amorphous structural template for ubiquitous systems. Its specification necessitates determination of the complete hierarchical structure, starting from short-range-order (SRO) → medium-range-order (MRO) → bulk structure and free volume (FV) distribution. This link has largely remained elusive since previous investigations adopted one-technique-at-a-time approach, focusing on limited aspects of any one domain. Reconstruction of structure from experimental data inversion is non-unique for many of these techniques. As a result, complete and precise structural understanding of glass has not emerged yet. In this work, we demonstrate the first experimental pathway for reconstruction of the integrated structure, forZr 67 Ni 33 andZr 52 Ti 6 Al 10 Cu 18 Ni 14 glasses. Our strategy engages diverse (× 7) multi-scale techniques [XAFS, 3D-APT, ABED/NBED, FEM, XRD, PAS, FHREM] on the same glass. This strategy complemented mutual limitations of techniques and corroborated common parameters to generate complete, self-consistent and precise parameters. Further, MRO domain size and inter-void separation were correlated to identify the presence of FV at MRO boundaries. This enabled the first experimental reconstruction of hierarchical subset: SRO → MRO → FV → bulk structure. The first ever image of intermediate region between MRO domains emerged from this link. We clarify that determination of all subsets is not our objective; the essence and novelty of this work lies in directing the pathway towards finite solution, in the most logical and unambiguous way.
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Affiliation(s)
- Debdutta Lahiri
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
| | - K V Mani Krishna
- Materials Science Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Ashok K Verma
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
| | - P Modak
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - B Vishwanadh
- Materials Science Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Soma Chattopadhyay
- Physical Sciences Department, Elgin Community College, 1700 Spartan Drive, Elgin, IL, 60123, USA
| | - Tomohiro Shibata
- Materials Science, Kennametal Inc., 1600 Technology Way, Latrobe, PA, 15650, USA
| | - S K Sharma
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Sudip Kumar Sarkar
- Materials Science Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | | | - A Biswas
- Materials Science Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Nandini Garg
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - G K Dey
- Materials Group, Bhabha Atomic Research Centre, Mumbai, 400085, India
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Mondal D, Bagchi A, Biswas S, Dagar T, Biswas A, Bagchi A, De S. Vesicle-Encapsulated Rolipram (PDE4 Inhibitor) and Its Anticancer Activity. ACS Appl Bio Mater 2024; 7:369-378. [PMID: 38150107 DOI: 10.1021/acsabm.3c00961] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Vesicular carriers of drugs are popular for specific targeting and delivery. The most popular vesicles among these are liposomes. However, they suffer from some inherent limitations. In this work, alternative vesicles with enhanced stability, i.e., niosomes and bilosomes have been prepared, characterized, and their delivery efficiency studied. Bilosomes have the additional advantage of being able to withstand the harsh environment of the gastrointestinal tract (GIT). The taurine-derived bile salt (NaTC) was incorporated into the bilosome bilayer. The inspiration behind NaTC insertion is the recent reports on antiaging action and immune function of taurine. Fluorescence probing was used to study the vesicle environment. The entrapment and subsequent release of the important cAMP-specific PDE4 inhibitor/drug Rolipram, which has antibreast cancer properties, was assessed on the breast cancer cell line MCF-7. Rolipram has important therapeutic applications, one of the most significant in recent times being the treatment of Covid-19-triggered pneumonia and cytokine storms. As for cancer chemotherapy, the localization of drug, targeted delivery, and sustained release are extremely important issues, and it seemed worthwhile to explore the potential of the bilosomes and niosomes to entrap and release Rolipram. The important finding is that niosomes perform much better than bilosomes in the hormone-responsive breast cancer mileau MCF-7. Moreover, there was a 4-fold decrease in the IC50 of Rolipram encapsulated in niosomes compared to Rolipram alone. On the other hand, bilosome-encapsulated Rolipram shows higher IC50 value. The results can be further understood by molecular docking studies.
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Affiliation(s)
- Durga Mondal
- Department of Chemistry, University of Kalyani, Kalyani, West Bengal 741235, India
| | - Arka Bagchi
- Department of Zoology, University of Kalyani, Kalyani, West Bengal 741235, India
| | - Sima Biswas
- Department of Biochemistry and Biophysics, University of Kalyani, Kalyani, West Bengal 741235, India
| | - Tanmay Dagar
- Department of Chemistry, University of Kalyani, Kalyani, West Bengal 741235, India
| | - Arunima Biswas
- Department of Zoology, University of Kalyani, Kalyani, West Bengal 741235, India
| | - Angshuman Bagchi
- Department of Biochemistry and Biophysics, University of Kalyani, Kalyani, West Bengal 741235, India
| | - Swati De
- Department of Chemistry, University of Kalyani, Kalyani, West Bengal 741235, India
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Ghosh S, Saha R, Sarkar S, Biswas A, Ghosh K. Rhodamine hydrazide-linked naphthalimide derivative: Selective naked eye detection of Cu 2+, S 2- and understanding the therapeutic potential of the copper complex as an anti-cervical cancer agent. Spectrochim Acta A Mol Biomol Spectrosc 2024; 305:123428. [PMID: 37806240 DOI: 10.1016/j.saa.2023.123428] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/14/2023] [Accepted: 09/17/2023] [Indexed: 10/10/2023]
Abstract
A naphthalimide-labeled rhodamine hydrazone derivative HL has been synthesized, characterized and examined in metal ion recognition. It shows selective colorimetric detection of Cu2+ over a number of other metal ions with a detection limit of 1.66 × 10-7 M in CH3CN/HEPES buffer (v/v = 2:1, pH = 6.8). The spirolactam ring of rhodamine and the imino-phenol motif of naphthalimide in HL are involved in complexation of Cu2+ as shown by single crystal X-ray. Single crystal of the copper-complex is prepared by utilizing NaSCN and it is characterized as CuL(SCN). The emergence of new absorption at 550 nm in UV-vis and the pink color of the solution reveal the selective interaction toward Cu2+. HL is characterized as a fluorescence resonance energy transfer (FRET) system that remains 'turned OFF' while spirolactam ring exists. In the presence of Cu2+, FRET is 'turned ON' via the opening of spirolactam ring to give emission at 580 nm which is less intense due to the quenching effect of Cu2+ ion. The complexation is reversible and the ensemble of Cu2+.HL selectively recognizes S2- over a series of different anions involving a color change from pink to colorless via the formation of spirolactam ring. The copper complex CuL(SCN) is further employed to understand its efficacy as a therapeutic agent. The complex is cytotoxic to high-risk HPV positive cervical cancer cell lines like SiHa and HeLa and is efficient in the generation and accumulation of reactive oxygen species (ROS). The complex also initiates nuclear blebbing and shows DNA degradation as understood by DNA laddering assay.
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Affiliation(s)
- Subhasis Ghosh
- Department of Chemistry, University of Kalyani, Kalyani 741235, India
| | - Rajat Saha
- Department of Chemistry, Kazi Nazrul University, Asansol 713340, India
| | - Solanki Sarkar
- Department of Zoology, University of Kalyani, Kalyani 741235, India
| | - Arunima Biswas
- Department of Zoology, University of Kalyani, Kalyani 741235, India
| | - Kumaresh Ghosh
- Department of Chemistry, University of Kalyani, Kalyani 741235, India.
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Biswas A, Bhattacharjee A, Das PK. Modulation and Determination of the Status of Inflammasomes in Leishmania-Infected Macrophages. Methods Mol Biol 2024; 2782:137-146. [PMID: 38622398 DOI: 10.1007/978-1-0716-3754-8_10] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Leishmania, an intra-macrophage kinetoplastid parasite, modulates a vast array of defensive mechanisms of the host macrophages to create a comfortable environment for their survival. When the host encounters intracellular pathogens, a multimeric protein complex called NLRP3 inflammasome gets turned on, leading to caspase-1 activation-mediated maturation of IL-1β from its pro-form. However, Leishmania often manages to neutralize inflammasome activation by manipulating negative regulatory molecules of the host itself. Exhaustion of NLRP3 and pro-IL-1β result from decreased NF-κB activity in infection, which was attributed to increased expression of A20, a negative regulator of NF-κB signalling. Moreover, reactive oxygen species, another key requirement for inflammasome activation, are inhibited by mitochondrial uncoupling protein 2 (UCP2) which is upregulated by Leishmania. Inflammasome activation is a complex event and procedures involved in monitoring inflammasome activation need to be accurate and error-free. In this chapter, we summarize the protocol that includes various experimental procedures required for the determination of the status of inflammasomes in Leishmania-infected macrophages.
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Affiliation(s)
- Arunima Biswas
- Department of Zoology, Molecular Cell Biology laboratory, University of Kalyani, Kalyani, India.
| | - Anindita Bhattacharjee
- Department of Zoology, Molecular Cell Biology laboratory, University of Kalyani, Kalyani, India
| | - Pijush K Das
- CSIR-Indian Institute of Chemical Biology, Kolkata, India.
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Ivaškevičius V, Biswas A, Singh S, Stulpinaitė U, Reda S, Rühl H, Pezeshkpoor B, Pavlova A, Oldenburg J. Fibrinogen Bonn (p. Arg510Cys) in the Aα-Chain Is Associated with High Risk of Venous Thrombosis. Hamostaseologie 2023; 43:440-446. [PMID: 37442158 DOI: 10.1055/a-2094-7191] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/15/2023] Open
Abstract
INTRODUCTION Inherited dysfibrinogenemia is a qualitative defect of fibrinogen caused by various mutations among three fibrinogen genes. Dysfibrinogenemia can be associated with an increased risk of thrombosis, bleeding, or both. Here, we report a 36-year-old female with dysfibrinogenemia who experienced two successful pregnancies under thromboprophylaxis after cerebral venous sinus thrombosis (CVST). PATIENTS AND METHODS In addition to plasmatic coagulation tests, fibrinogen genes FGA, FGB, and FGG were screened using direct genomic DNA sequencing. The structural-functional implications of the detected mutation were analyzed in silico. RESULTS Inherited dysfibrinogenemia was diagnosed in an index patient after CVST in a risk situation. Anticoagulation with warfarin was stopped after 12 months when the first pregnancy was planned. Pregnancy and spontaneous delivery (2020) was uncomplicated. A second pregnancy was interrupted because of acute cytomegalovirus infection and the third pregnancy was successful in 2022. Pregnancies were accompanied by thromboprophylaxis with enoxaparin 40 mg once daily until 6 weeks postpartum. Substitution of fibrinogen has not become necessary in the index patient so far. Genetic analysis revealed a novel missense mutation (p. Arg510Cys) in the FGA gene ("fibrinogen Bonn") in the index patient, as well as an asymptomatic sister, and their father who experienced recurrent pulmonary embolism. Surface exposure of wild-type Arg510 suggested the mutated Cys510 to form nonnative disulfide bonds with surface-exposed reactive cysteines from other plasma proteins like albumin leading to formation of aggregates and impaired fibrinolysis. CONCLUSIONS Fibrinogen Bonn might be associated with an increased risk of thrombosis, possibly due to impaired polymerization.
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Affiliation(s)
- V Ivaškevičius
- Institute for Experimental Hematology and Transfusion Medicine, University Hospital Bonn, Bonn, Germany
| | - A Biswas
- Institute for Experimental Hematology and Transfusion Medicine, University Hospital Bonn, Bonn, Germany
| | - S Singh
- Institute for Experimental Hematology and Transfusion Medicine, University Hospital Bonn, Bonn, Germany
| | - U Stulpinaitė
- Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - S Reda
- Institute for Experimental Hematology and Transfusion Medicine, University Hospital Bonn, Bonn, Germany
| | - H Rühl
- Institute for Experimental Hematology and Transfusion Medicine, University Hospital Bonn, Bonn, Germany
| | - B Pezeshkpoor
- Institute for Experimental Hematology and Transfusion Medicine, University Hospital Bonn, Bonn, Germany
| | - A Pavlova
- Institute for Experimental Hematology and Transfusion Medicine, University Hospital Bonn, Bonn, Germany
| | - J Oldenburg
- Institute for Experimental Hematology and Transfusion Medicine, University Hospital Bonn, Bonn, Germany
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Biswas A, Roy S, Ghosh V, Kumar L, Sharma A, Gupta R, Mallick S. Clinical Outcome and Patterns of Failure in Patients with Solitary Plasmacytoma Treated with Radical Radiotherapy. Int J Radiat Oncol Biol Phys 2023; 117:S109. [PMID: 37784287 DOI: 10.1016/j.ijrobp.2023.06.073] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) We intended to assess the patterns of care and failure in patients with solitary plasmacytoma (SP), treated at our institute from 2011-21. MATERIALS/METHODS Data pertaining to the management of patients with SP was abstracted by retrospective chart review. Progression free survival (PFS) and overall survival (OS) were defined as the time intervals from the date of diagnosis to the date of progression (local, systemic or both) and death or last follow up, respectively. PFS and OS were analyzed by Kaplan Meier method. RESULTS Atotal of 72 patients were diagnosed with SP (61-bone plasmacytoma; 11-extramedullary plasmacytoma) in between 2011 and 2021. The median age at diagnosis was 52 years. The male: female ratio was 2.27. The ECOG PS were 0, 1, 2, 3, and 4 in 1, 46, 11, 10, and 3 patients, respectively. The median diameter of the lesion was 6.7 cm (range 2.3-18.4 cm). The median M protein was 0.375 g/dl (range 0.63-5.3 g/dl). On bone marrow examination, 8 and 64 patients had no and minimal marrow involvement, respectively (median bone marrow plasma cells 4%). Radical radiotherapy (RT) was administered in 71 patients, the techniques being 2D-conventional in 35, 3D-conformal in 14, IMRT in 8 and VMAT in 5 patients (details not available in 9). The median RT dose was 45 Gy in 25 fractions over 5 weeks (range 45-50 Gy). In addition, 5(7%) patients underwent surgery prior to RT and 6(8.5%) patients received systemic chemotherapy. After RT, the median quantum of symptom relief was 75% (range 0-100%). The best response to RT was CR, PR, SD and PD in 41(57.7%),18(25.4%),3(4.2%) and 4(5.6%) patients, respectively (response assessment could not be done in 5). Local control with primary RT was achieved in 58(81.7%) patients. No RT related grade 3/4 acute or late toxicity was reported. The median follow up was 48.3 months (range 1.3-141.6 months). A total of 28(39.4%) patients experienced disease progression (systemic in 15, local in 7 and both in 6), out of which 13 could be successfully salvaged with further systemic chemotherapy (mostly bortezomib, lenalidomide/pomalidomide and dexamethasone based) with or without local treatment. On progression to multiple myeloma, 9 patients underwent high dose chemotherapy(melphalan) followed by autologous stem cell transplant. Nine (12.7%) patients died, the causes being COVID-19 infection in 1, surgical complications in 1, PD in 2, second malignancies in 3 and unknown in 2. The actuarial rates of PFS & OS were 58.4% & 92.5% at 3 years and 50.3% & 89.4% at 5 years, respectively. Metachronous second malignancies were noted in 4 patients (B-ALL-1, lung cancer-1, metastatic carcinoma cervix-1, metastatic carcinoma gall bladder-1). CONCLUSION In patients with SP, radical RT with a modest dose (45-50 Gy) leads to satisfactory symptom relief, response and local control. Close to 40% patients eventually progress to multiple myeloma, out of which 50% can be successfully salvaged with further systemic chemotherapy. The 5-year OS approaches 90% in this cohort.
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Affiliation(s)
- A Biswas
- All India Institute of Medical Sciences, New Delhi, India
| | - S Roy
- All India Institute of Medical Sciences, New Delhi, India
| | - V Ghosh
- All India Institute of Medical Sciences, New Delhi, India
| | - L Kumar
- All India Institute of Medical Sciences, New Delhi, India
| | - A Sharma
- All India Institute of Medical Sciences, New Delhi, India
| | - R Gupta
- All India Institute of Medical Sciences, New Delhi, India
| | - S Mallick
- All India Institute of Medical Sciences, New Delhi, India
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Pattanaik J, Bhasker S, Biswas A, R AV, Sharma A, Pramanik R, Kumar R, Sanyal S, Samala SK, Ghosh V, Sushant S, Pandey S, Tanwar MS, Praveen DVS, Mandal S. Patient-Reported Outcomes Evaluating the Impact of Hypo-Fractionated Palliative Quadshot Radiotherapy and Concurrent CDDP Treatment on Health-Related Quality of Life in Patients with Locally Advanced Squamous Cell Carcinoma of the Head and Neck. Int J Radiat Oncol Biol Phys 2023; 117:S122. [PMID: 37784316 DOI: 10.1016/j.ijrobp.2023.06.461] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) In locally advanced squamous cell carcinoma of the head and neck (LAHNSCC), the main goal of treatment remains survival while improving quality of life (QOL). In recent decades, there has been a paradigm shift in the measurement of clinical outcomes in patients diagnosed with cancer, focusing on the patient perspective by incorporating patient-reported outcomes (PROs). The primary objective of this study was to evaluate the improvement in quality of life with the use of cyclic hypo-fractionated palliative QUAD SHOT radiotherapy (RT) with concurrent cisplatin (CDDP) in previously untreated patients with incurable LAHNSCC. MATERIALS/METHODS In this prospective interventional phase- II study, 60 patients with locally advanced squamous cell carcinoma of the head and neck, majority stage IVB, ECOG PS ≤ 3, were treated with QUAD SHOT RT (14 Gy/4 fractions/2 days - BD with 6-hour interval and concurrent CDDP at 6 mg/m2. This treatment was repeated at 4-week intervals for 2 additional cycles if tumor progression did not occur. Serial changes in HR -QoL were assessed using EORTC QLQ C-30 and H&N-35) at 4 different time points. Statistical methods such as the Wilcoxon signed-rank test and Friedman test were used to compare QoL values at different time points with Bonferroni correction for multiple comparisons to control for type I errors. RESULTS The median global health score (GHS) at baseline was 41.667, with an initial increase in score at 4 weeks (50.00) and at 8 weeks (54.167) that did not continue at 12 weeks (41.667). Symptoms related to toxicities (speech, social contact, sticky saliva, dry mouth, senses in H&N 35) were lower after 4 weeks. Application of the Friedman test for four time points revealed significant improvement in role function at 4 weeks, which remained constant at 8 weeks but was not sustained at 12 weeks. Comparison of HN-35 symptom scores between the four time points showed improvement in symptoms such as pain, swallowing, and mouth opening at 4 and 8 weeks. The mean QLQ C30 summary score for these patients improved at four weeks but did not remain constant at 8 and 12 weeks. CONCLUSION Our study showed significant improvement in quality-of-life parameters and reduction in symptom burden at 4 and 8 weeks due to disease control and symptom palliation by QUADSHOT CTRT, while quality-of-life scores worsened and symptom scores were not maintained at 12 weeks due to disease progression and occurrence of acute toxicities. This phase II study may serve as the basis for designing a phase III randomized control trial to compare quality of life changes with QUADSHOT CTRT and other palliative CTRT regimens.
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Affiliation(s)
- J Pattanaik
- All India Institute of Medical Sciences, New Delhi, India
| | - S Bhasker
- All India Institute of Medical Sciences, New Delhi, India
| | - A Biswas
- All India Institute of Medical Sciences, New Delhi, India
| | - A V R
- All India Institute of Medical Sciences, New Delhi, India
| | - A Sharma
- All India Institute of Medical Sciences, New Delhi, India
| | - R Pramanik
- DM Medical Oncology, AIIMS New Delhi, Delhi, India
| | - R Kumar
- All India Institute of Medical Sciences, Delhi Cancer Registry, New Delhi, India
| | - S Sanyal
- All India Institute of Medical Sciences, New Delhi, India
| | - S K Samala
- All India Institute of Medical Sciences, New Delhi, India
| | - V Ghosh
- All India Institute of Medical Sciences, New Delhi, India
| | - S Sushant
- All India Institute of Medical Sciences, New Delhi, India
| | - S Pandey
- All India Institute of Medical Sciences, New Delhi, India
| | - M S Tanwar
- All India Institute of Medical Sciences, New Delhi, India
| | - D V S Praveen
- All India Institute of Medical Sciences, New Delhi, India
| | - S Mandal
- All India Institute of Medical Sciences, New Delhi, India
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Singh UB, Ray Y, Kanswal S, Sharma HP, Aayilliath AK, Wig N, Ahuja V, Biswas A, Velpandian T. Low rifampicin levels in plasma associated with a poor clinical response in patients with abdominal TB. Int J Tuberc Lung Dis 2023; 27:787-789. [PMID: 37749829 PMCID: PMC10519389 DOI: 10.5588/ijtld.23.0149] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 06/15/2023] [Indexed: 09/27/2023] Open
Affiliation(s)
- U B Singh
- Department of Microbiology, All India Institute of Medical Sciences (AIIMS), New Delhi
| | - Y Ray
- Department of Microbiology, All India Institute of Medical Sciences (AIIMS), New Delhi, Department of Medicine, AIIMS, New Delhi
| | - S Kanswal
- Centralized Core Research Facility, AIIMS, New Delhi
| | - H P Sharma
- Centralized Core Research Facility, AIIMS, New Delhi
| | - A K Aayilliath
- Department of Microbiology, All India Institute of Medical Sciences (AIIMS), New Delhi, Department of Medicine, AIIMS, New Delhi
| | - N Wig
- Department of Medicine, AIIMS, New Delhi
| | - V Ahuja
- Department of Gastroenterology, AIIMS, New Delhi
| | - A Biswas
- Department of Medicine, AIIMS, New Delhi
| | - T Velpandian
- Department of Ocular Pharmacology & Pharmacy, AIIMS, New Delhi, India
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Bhasker S, Pattanaik J, Biswas A, R AV, Sharma A, Pramanik R, Sanyal S, Praveen DVS, Kumar R, Sushant S, Ghosh V, Mandal S, Samala SK, Tanwar MS, Pandey S. Hypo-Fractionated Palliative QUADSHOT Radiotherapy and Concurrent CDDP in Patients with LAHNSCC: Toxicities and Clinical Outcomes. Int J Radiat Oncol Biol Phys 2023; 117:e567. [PMID: 37785734 DOI: 10.1016/j.ijrobp.2023.06.1893] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Shorter palliative hypo-fractionated radiotherapy regimens given concurrently with chemotherapy, preferably cisplatin (radiosensitizer), increase response rates with acceptable toxicity, leading to better compliance of patients with locally advanced squamous cell carcinoma of the head and neck (LAHNSCC) in whom late toxicities due to chemoradiotherapy are less relevant. This single institution prospective interventional phase II study was conducted with the goal of achieving high rates of locoregional control with acceptable treatment-related toxicity. MATERIALS/METHODS In this prospective interventional phase- II study, 60 patients with LAHNSCC (treatment naive), the majority in stage IVB and ECOG PS ≤ 3, were treated with QUAD SHOT RT using the conventional 2D technique (14Gy in 4 fractions on 2 consecutive days twice daily with a 6-hour interval between the two fractions) and concurrent cisplatin (CDDP) at a dose of 6 mg/m2. This treatment was repeated at 4-week intervals for 2 additional cycles if tumor progression did not occur. The Kaplan-Meier method was used to determine survival probability for progression-free survival (PFS) and overall survival (OS). Descriptive statistics with number and percentage were used for each toxicity and tumor response at different time points. A P value of less than 0.05 was considered significant. RESULTS In our study, all patients received at least one cycle of QUADSHOT chemoradiotherapy (CTRT), while 35 and 18 patients received the 2nd and 3rd QUADSHOT CTRT, respectively. Of the patients who completed the first cycle of QUADSHOT CTRT, 27 (45%) patients had a partial response (PR) and 22 (36.7%) had stable disease (SD). Of the patients who completed the second cycle QUADSHOT CTRT, 77.2% had SD, while 11.4% had PR and 11.4% had PD. After the 3rd QUADSHOT CTRT, 72.2% had SD, while 11.1% had PR and 16.7% had PD. The overall response rate (SD +PR) in our study was 81%, 88.6%, and 83% after the 1st, 2nd, and 3rd QUADSHOT CTRT, respectively. After the 3rd QUADSHOT CTRT, no patient showed grade 4 toxicity. Most patients had grade I/ II toxicities e.g., skin (grade I -83%), mucositis (grade II -50%), salivary gland toxicity (grade II -50%), grade I laryngitis (83.3%). Grade- III oral mucositis and pharyngitis were seen in 27% and 6.7% of patients, respectively. Median OS and PFS were 7.9 months and 6.2 months, respectively. CONCLUSION Concurrent chemotherapy acts as a radiosensitizer and provides a synergistic effect when coupled with hypo-fractionated radiation, resulting in more effective control of locoregional disease in locally advanced head and neck tumors with acceptable toxicities. This study is hypothesis-generating and may serve as a basis for developing optimal CTRT regimens for patients with LAHNSCC who are not suitable for curative treatment.
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Affiliation(s)
- S Bhasker
- All India Institute of Medical Sciences, New Delhi, India
| | - J Pattanaik
- All India Institute of Medical Sciences, New Delhi, India
| | - A Biswas
- All India Institute of Medical Sciences, New Delhi, India
| | - A V R
- All India Institute of Medical Sciences, New Delhi, India
| | - A Sharma
- All India Institute of Medical Sciences, New Delhi, India
| | - R Pramanik
- DM Medical Oncology, AIIMS New Delhi, Delhi, India
| | - S Sanyal
- All India Institute of Medical Sciences, New Delhi, India
| | - D V S Praveen
- All India Institute of Medical Sciences, New Delhi, India
| | - R Kumar
- All India Institute of Medical Sciences, Delhi Cancer Registry, New Delhi, India
| | - S Sushant
- All India Institute of Medical Sciences, New Delhi, India
| | - V Ghosh
- All India Institute of Medical Sciences, New Delhi, India
| | - S Mandal
- All India Institute of Medical Sciences, New Delhi, India
| | - S K Samala
- All India Institute of Medical Sciences, New Delhi, India
| | - M S Tanwar
- All India Institute of Medical Sciences, New Delhi, India
| | - S Pandey
- All India Institute of Medical Sciences, New Delhi, India
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12
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Abstract
Zika virus (ZIKV) is an arthropod-borne flavivirus that presents with acute febrile illness associated with rash, arthralgia and conjunctivitis. After years of sporadic reports in Africa, the three major outbreaks of this disease occurred in Yap Islands (2007), French Polynesia (2013-14) and South Americas (2015-16). Although, serological surveys suggested the presence of ZIKV in India in 1950s, cross-reactivity could not be ruled out. The first four proven cases of ZIKV from India were reported in 2017. This was followed by major outbreaks in the states of Rajasthan and Madhya Pradesh in 2018. Fortunately, the outbreaks in India were not associated with neurological complications. These outbreaks in India highlighted the spread of this disease beyond geographical barriers owing to the growing globalization, increased travel and ubiquitous presence of its vector, the Aedes mosquito. In this review, we discuss the epidemiology, clinical features and management of ZIKV in India.
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Affiliation(s)
- N Gupta
- From the Department of Medicine, All India Institute of Medical Sciences, 3rd Floor, Teaching Block, New Delhi 110029
| | - P Kodan
- From the Department of Medicine, All India Institute of Medical Sciences, 3rd Floor, Teaching Block, New Delhi 110029
| | - K Baruah
- National Vector Borne Disease Control Programme, Ministry of Health and Family Welfare, Government of India, 22 Shyam Nath Marg, New Delhi 110054, India
| | - M Soneja
- From the Department of Medicine, All India Institute of Medical Sciences, 3rd Floor, Teaching Block, New Delhi 110029
| | - A Biswas
- From the Department of Medicine, All India Institute of Medical Sciences, 3rd Floor, Teaching Block, New Delhi 110029
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Pan A, Bhaduri R, Mandal S, Kumar Tarai S, Bagchi A, Biswas A, Moi SC. Photophysical study on DNA & BSA binding and cytotoxic behaviour of piperidine-Pt(II) complexes: their kinetics & mechanism and molecular docking. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114740] [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: 04/03/2023]
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14
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Biswas A, McNamara C, Gowda VK, Gala F, Sudhakar S, Sidpra J, Vari MS, Striano P, Blaser S, Severino M, Batzios S, Mankad K. Neuroimaging Features of Biotinidase Deficiency. AJNR Am J Neuroradiol 2023; 44:328-333. [PMID: 36759144 PMCID: PMC10187823 DOI: 10.3174/ajnr.a7781] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 01/04/2023] [Indexed: 02/11/2023]
Abstract
Biotinidase deficiency is an autosomal recessive condition caused by pathogenic variants in the BTD gene. Resultant deficiency of free biotin leads to impaired activity of the enzyme carboxylase and related neurologic, dermatologic, and ocular symptoms. Many of these are reversible on treatment, but early recognition and commencement of biotin supplementation are critical. This practice is especially important in countries where routine neonatal screening for biotinidase deficiency is not performed. In this report comprising 14 patients from multiple centers, we demonstrate the MR imaging patterns of this disorder at various age groups. Knowledge of these patterns in the appropriate clinical context will help guide early diagnosis of this treatable metabolic disorder.
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Affiliation(s)
- A Biswas
- From the Department of Diagnostic Imaging (A.B., S. Blaser), The Hospital for Sick Children, Toronto, Ontario, Canada
- Departments of Neuroradiology (A.B., C.M., S.S., J.S., K.M.)
| | - C McNamara
- Departments of Neuroradiology (A.B., C.M., S.S., J.S., K.M.)
| | - V K Gowda
- Department of Pediatric Neurology (V.K.G.), Indira Gandhi Institute of Child Health, Bengaluru, Karnataka, India
| | - F Gala
- Department of Radiodiagnosis (F.G.), Bai Jerbai Wadia Hospital, Mumbai, Maharashtra, India
| | - S Sudhakar
- Departments of Neuroradiology (A.B., C.M., S.S., J.S., K.M.)
| | - J Sidpra
- Departments of Neuroradiology (A.B., C.M., S.S., J.S., K.M.)
- Developmental Biology and Cancer Section (J.S.), University College London Great Ormond Street Institute of Child Health, London, UK
| | - M S Vari
- Pediatric Neurology and Muscular Diseases Unit (M.S.V., P.S.)
| | - P Striano
- Pediatric Neurology and Muscular Diseases Unit (M.S.V., P.S.)
| | - S Blaser
- From the Department of Diagnostic Imaging (A.B., S. Blaser), The Hospital for Sick Children, Toronto, Ontario, Canada
| | - M Severino
- Neuroradiology Unit (M.S.), Istituto di Ricovero e Cura a Carattere Scientifico Istituto Giannina Gaslini, Genoa, Italy
| | - S Batzios
- Paediatric Metabolic Medicine (S. Batzios), Great Ormond Street Hospital for Children, National Health Service Foundation Trust, London, UK
| | - K Mankad
- Departments of Neuroradiology (A.B., C.M., S.S., J.S., K.M.)
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15
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White K, Connor K, Meylan M, Bougoüin A, Salvucci M, Bielle F, O'Farrell AC, Sweeney K, Weng L, Bergers G, Dicker P, Ashley DM, Lipp ES, Low JT, Zhao J, Wen P, Prins R, Verreault M, Idbaih A, Biswas A, Prehn JHM, Lambrechts D, Arijs I, Lodi F, Dilcan G, Lamfers M, Leenstra S, Fabro F, Ntafoulis I, Kros JM, Cryan J, Brett F, Quissac E, Beausang A, MacNally S, O'Halloran P, Clerkin J, Bacon O, Kremer A, Chi Yen RT, Varn FS, Verhaak RGW, Sautès-Fridman C, Fridman WH, Byrne AT. Identification, validation and biological characterisation of novel glioblastoma tumour microenvironment subtypes: implications for precision immunotherapy. Ann Oncol 2023; 34:300-314. [PMID: 36494005 DOI: 10.1016/j.annonc.2022.11.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 11/14/2022] [Accepted: 11/15/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND New precision medicine therapies are urgently required for glioblastoma (GBM). However, to date, efforts to subtype patients based on molecular profiles have failed to direct treatment strategies. We hypothesised that interrogation of the GBM tumour microenvironment (TME) and identification of novel TME-specific subtypes could inform new precision immunotherapy treatment strategies. MATERIALS AND METHODS A refined and validated microenvironment cell population (MCP) counter method was applied to >800 GBM patient tumours (GBM-MCP-counter). Specifically, partition around medoids (PAM) clustering of GBM-MCP-counter scores in the GLIOTRAIN discovery cohort identified three novel patient clusters, uniquely characterised by TME composition, functional orientation markers and immune checkpoint proteins. Validation was carried out in three independent GBM-RNA-seq datasets. Neoantigen, mutational and gene ontology analysis identified mutations and uniquely altered pathways across subtypes. The longitudinal Glioma Longitudinal AnalySiS (GLASS) cohort and three immunotherapy clinical trial cohorts [treatment with neoadjuvant/adjuvant anti-programmed cell death protein 1 (PD-1) or PSVRIPO] were further interrogated to assess subtype alterations between primary and recurrent tumours and to assess the utility of TME classifiers as immunotherapy biomarkers. RESULTS TMEHigh tumours (30%) displayed elevated lymphocyte, myeloid cell immune checkpoint, programmed cell death protein 1 (PD-1) and cytotoxic T-lymphocyte-associated protein 4 transcripts. TMEHigh/mesenchymal+ patients featured tertiary lymphoid structures. TMEMed (46%) tumours were enriched for endothelial cell gene expression profiles and displayed heterogeneous immune populations. TMELow (24%) tumours were manifest as an 'immune-desert' group. TME subtype transitions upon recurrence were identified in the longitudinal GLASS cohort. Assessment of GBM immunotherapy trial datasets revealed that TMEHigh patients receiving neoadjuvant anti-PD-1 had significantly increased overall survival (P = 0.04). Moreover, TMEHigh patients treated with adjuvant anti-PD-1 or oncolytic virus (PVSRIPO) showed a trend towards improved survival. CONCLUSIONS We have established a novel TME-based classification system for application in intracranial malignancies. TME subtypes represent canonical 'termini a quo' (starting points) to support an improved precision immunotherapy treatment approach.
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Affiliation(s)
- K White
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - K Connor
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - M Meylan
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université de Paris, Paris, France
| | - A Bougoüin
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université de Paris, Paris, France
| | - M Salvucci
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - F Bielle
- Paris Brain Institute (ICM), CNRS UMR 7225, Inserm U 1127, UPMC-P6 UMR S 1127, Hôpital de la Pitié-Salpêtrière, Paris, France
| | - A C O'Farrell
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - K Sweeney
- National Centre of Neurosurgery, Beaumont Hospital, Dublin, Ireland
| | - L Weng
- VIB-KU Leuven Center for Cancer Biology, Department of Oncology, Leuven, Belgium
| | - G Bergers
- VIB-KU Leuven Center for Cancer Biology, Department of Oncology, Leuven, Belgium
| | - P Dicker
- Epidemiology & Public Health, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - D M Ashley
- Duke Cancer Institute, Duke University, Durham, USA
| | - E S Lipp
- Duke Cancer Institute, Duke University, Durham, USA
| | - J T Low
- Duke Cancer Institute, Duke University, Durham, USA
| | - J Zhao
- Department of Systems Biology at Columbia University, New York, USA
| | - P Wen
- Center for Neuro-Oncology, Dana-Farber Cancer Institute, Boston, USA
| | - R Prins
- Department of Medical and Molecular Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, USA
| | - M Verreault
- Paris Brain Institute (ICM), CNRS UMR 7225, Inserm U 1127, UPMC-P6 UMR S 1127, Hôpital de la Pitié-Salpêtrière, Paris, France
| | - A Idbaih
- Sorbonne Université, Inserm, CNRS, UMR S 1127, Paris Brain Institute (ICM), AP-HP, Hôpitaux Universitaires La Pitié Salpêtrière-Charles Foix, Paris, France
| | - A Biswas
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - J H M Prehn
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - D Lambrechts
- Laboratory for Translational Genetics, Department of Human Genetics, Leuven, Belgium; VIB Center for Cancer Biology, Leuven, Belgium
| | - I Arijs
- Laboratory for Translational Genetics, Department of Human Genetics, Leuven, Belgium; VIB Center for Cancer Biology, Leuven, Belgium
| | - F Lodi
- Laboratory for Translational Genetics, Department of Human Genetics, Leuven, Belgium; VIB Center for Cancer Biology, Leuven, Belgium
| | - G Dilcan
- Laboratory for Translational Genetics, Department of Human Genetics, Leuven, Belgium; VIB Center for Cancer Biology, Leuven, Belgium
| | - M Lamfers
- Department of Neurosurgery, Brain Tumor Center, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - S Leenstra
- Department of Neurosurgery, Brain Tumor Center, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - F Fabro
- Department of Neurosurgery, Brain Tumor Center, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - I Ntafoulis
- Department of Neurosurgery, Brain Tumor Center, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - J M Kros
- Department of Pathology, Erasmus Medical Center, Rotterdam, the Netherlands
| | - J Cryan
- Department of Neuropathology, Beaumont Hospital, Dublin, Ireland
| | - F Brett
- Department of Neuropathology, Beaumont Hospital, Dublin, Ireland
| | - E Quissac
- Paris Brain Institute (ICM), CNRS UMR 7225, Inserm U 1127, UPMC-P6 UMR S 1127, Hôpital de la Pitié-Salpêtrière, Paris, France
| | - A Beausang
- Department of Neuropathology, Beaumont Hospital, Dublin, Ireland
| | - S MacNally
- National Centre of Neurosurgery, Beaumont Hospital, Dublin, Ireland
| | - P O'Halloran
- National Centre of Neurosurgery, Beaumont Hospital, Dublin, Ireland
| | - J Clerkin
- National Centre of Neurosurgery, Beaumont Hospital, Dublin, Ireland
| | - O Bacon
- Department of Neuropathology, Beaumont Hospital, Dublin, Ireland
| | - A Kremer
- Information Technology for Translational Medicine (ITTM), Luxembourg, Luxembourg
| | - R T Chi Yen
- Information Technology for Translational Medicine (ITTM), Luxembourg, Luxembourg
| | - F S Varn
- The Jackson Laboratory for Genomic Medicine, Farmington, USA
| | - R G W Verhaak
- The Jackson Laboratory for Genomic Medicine, Farmington, USA; Department of Neurosurgery, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University Medical Center, Amsterdam, the Netherlands
| | - C Sautès-Fridman
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université de Paris, Paris, France
| | - W H Fridman
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université de Paris, Paris, France
| | - A T Byrne
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland.
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16
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Della Rosa M, Duranovich F, Pacheco D, Sandoval E, Khan A, Biswas A, Jonker A. Forage type affects the temporal methane emission profiles in dairy cows fed fresh forages. Anim Feed Sci Technol 2023. [DOI: 10.1016/j.anifeedsci.2023.115604] [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: 02/21/2023]
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17
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Phillips S, Biswas A, Watson T. An assessment of learners’ child passenger safety knowledge. Am J Med Sci 2023. [DOI: 10.1016/s0002-9629(23)00198-2] [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: 01/28/2023]
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18
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Sarkar P, Biswas A, Kumar R, Rai S, Jha SN, Bhattacharyya D. Role of C and B 4C barrier layers in controlling diffusion propagation across the interface of Cr/Sc multilayers. Phys Chem Chem Phys 2023; 25:3072-3082. [PMID: 36620902 DOI: 10.1039/d2cp03785h] [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: 01/10/2023]
Abstract
The optical performance of low-bilayer-thickness metallic multilayers (ML) can be improved significantly by limiting the intermixing of consecutive layers at the interfaces. Barrier layers are supposed to exhibit a decisive role in controlling diffusion across the interfaces. The element-specific grazing incidence extended X-ray absorption fine structure technique using synchrotron radiation has been used in conjunction with grazing incidence X-ray reflectivity and diffuse X-ray scattering measurements to study the impact of the two most common barrier layers, viz., C and B4C, at the interfaces of Cr/Sc MLs. The diffusion propagation is reduced by both the barrier layers; however, it is found that the improvement is more significant with the B4C barrier layer. It is seen that C forms an intermixed layer with Sc and leads to carbide formation at the interface, which then acts as shielding and prevents further interdiffusion, while B4C hardly penetrates into Sc and stops the overlap between Sc and Cr directly by wetting the corresponding interface. Thus, the above measurements reveal crucial and precise information regarding the elemental diffusion kinetics at the interfaces of Cr/Sc MLs in a non-destructive way, which is very important for technological applications of these MLs as X-ray optical devices.
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Affiliation(s)
- P Sarkar
- Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - A Biswas
- Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - Ravi Kumar
- Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - S Rai
- Synchrotron Utilisation Section, Raja Ramnna Centre for Advanced Technology, Indore 752013, India
| | - S N Jha
- Beamline Development & Applications Section Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - D Bhattacharyya
- Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
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Biswas A, Vega-Guzman J, Bansal A, Kara AH, Aphane M, Yildirim Y, Alshehri HM. Solitary waves, shock waves and conservation laws with the surface tension effect in the Boussinesq equation. PEAS 2023. [DOI: 10.3176/proc.2023.1.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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20
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D'Arco F, Biswas A, Clement E, Rajput K, Juliano AF. Subtle Malformation of the Cochlear Apex and Genetic Abnormalities: Beyond the "Thorny" Cochlea. AJNR Am J Neuroradiol 2023; 44:79-81. [PMID: 36549853 PMCID: PMC9835904 DOI: 10.3174/ajnr.a7746] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 11/15/2022] [Indexed: 12/24/2022]
Abstract
With the routine use of high-resolution heavily T2-weighted sequences to evaluate patients with hearing deficits, new, subtle phenotypes of cochlear malformations are being discovered and an increasing number of genotype-phenotype correlations are being found through a reverse phenotype approach, which can help guide geneticists. In this brief report, we present subtle malformations of the apical turn of the cochlea related to 3 genetic mutations, emphasizing the importance of a careful assessment of the cochlear apex.
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Affiliation(s)
- F D'Arco
- From the Department of Radiology (F.D., A.B.)
| | - A Biswas
- From the Department of Radiology (F.D., A.B.)
| | | | - K Rajput
- Audiological Medicine (K.R.), Great Ormond Street Hospital for Children, National Health Service Foundation Trust, London, UK
| | - A F Juliano
- Department of Radiology (A.F.J.), Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts
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21
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D'souza J, Biswas A, Gada P, Mangroliya J, Natarajan M. Barriers leading to increased disability in neurologically challenged populations during COVID-19 pandemic: a scoping review. Disabil Rehabil 2022; 44:7693-7706. [PMID: 34666575 DOI: 10.1080/09638288.2021.1986747] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
PURPOSE The objective of this scoping review was to get an overview of barriers emerging across the globe from the pandemic that are likely to increase the level of pre-existing disability status of neurologically challenged populations. METHODS Database searches (PubMed/MEDLINE, CINAHL, ProQuest, Ovid, Scopus, and Web of Science) updated to December 2020 were conducted. Articles that identified challenges or barriers to neuro-rehabilitation, impact on disability status and health care services were included. Full-text articles limited to the English language with no restrictions on study design were included. Data was synthesized based on recurrent themes that were identified. RESULTS Thirty-seven studies were included in this review. Neurological populations considered: stroke, multiple sclerosis, amyotrophic lateral sclerosis, parkinson's disease, autism, developmental disabilities, and those who required neurosurgical care. Barriers were grouped into categories as increased disease risk and complications, delayed or restricted access to neuro-rehabilitation, limited hospital access, telerehabilitation limitations, and shutdown of special centers of aid. CONCLUSIONS COVID-19 pandemic has given rise to barriers that affect almost every aspect of healthcare and rehabilitation in neurologically challenged populations prompting an increase in their disability level. This can assist policymakers in designing mitigation strategies to minimize the detrimental effects on this vulnerable population.Implications for rehabilitationPandemic has led to the worsening of existing motor and non-motor symptoms, which need to be monitored, assessed and managed medically, and through rehabilitation in neurologically challenged populations.Notable decline of cognition and physical activity in neurologically challenged populations needs to be assessed and efforts to reverse these outcomes should be attempted.Rehabilitation services, hospital care and centers of aid need to be made more accessible for neurologically challenged populations with COVID-19 precautionary measures.Telemedicine and telerehabilitation need to be upgraded to enhance further face to face like interactions and for tracking of progressive disease.
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Affiliation(s)
- Jennifer D'souza
- Department of Physiotherapy, St. John's Medical College, Unit of St. John's National Academy of Health Sciences, Bangalore, India
| | - Arunima Biswas
- Department of Physiotherapy, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, India
| | - Pooja Gada
- Healing Touch Physiotherapy Clinic, Vasai (W), India
| | | | - Manikandan Natarajan
- Department of Physiotherapy, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, India
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Mukherjee P, Bagchi A, Banerjee A, Roy H, Bhattacharya A, Biswas A, Chatterji U. PDE4 inhibitor eliminates breast cancer stem cells via noncanonical activation of mTOR. J Cell Biochem 2022; 123:1980-1996. [PMID: 36063486 DOI: 10.1002/jcb.30325] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 11/25/2021] [Revised: 05/25/2022] [Accepted: 08/17/2022] [Indexed: 12/24/2022]
Abstract
Ineffective cancer treatment is implicated in metastasis, recurrence, resistance to chemotherapy and radiotherapy, and evasion of immune surveillance. All these failures occur due to the persistence of cancer stem cells (CSCs) even after rigorous therapy, thereby rendering them as essential targets for cancer management. Contrary to the quiescent nature of CSCs, a gene profiler array disclosed that phosphatidylinositol-3-kinase (PI3K), which is known to be crucial for cell proliferation, differentiation, and survival, was significantly upregulated in CSCs. Since PI3K is modulated by cyclic adenosine 3',5' monophosphate (cAMP), analyses of cAMP regulation revealed that breast CSCs expressed increased levels of phosphodiesterase 4 (PDE4) in contrast to normal stem cells. In accordance, the effects of rolipram, a PDE4 inhibitor, were evaluated on PI3K regulators and signaling. The efficacy of rolipram was compared with paclitaxel, an anticancer drug that is ineffective in obliterating breast CSCs. Analyses of downstream signaling components revealed a switch between cell survival and death, in response to rolipram, specifically of the CSCs. Rolipram-mediated downregulation of PDE4A levels in breast CSCs led to an increase in cAMP levels and protein kinase A (PKA) expression. Subsequently, PKA-mediated upregulation of phosphatase and tensin homolog antagonized the PI3K/AKT/mTOR pathway and led to cell cycle arrest. Interestingly, direct yet noncanonical activation of mTOR by PKA, circumventing the influence of PI3K and AKT, temporally shifted the fate of CSCs toward apoptosis. Rolipram in combination with paclitaxel indicated synergistic consequences, which effectively obliterated CSCs within a tumor, thereby suggesting combinatorial therapy as a sustainable and effective strategy to abrogate breast CSCs for better patient prognosis.
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Affiliation(s)
- Pritha Mukherjee
- Cancer Research Laboratory, Department of Zoology, University of Calcutta, Kolkata, India
| | - Arka Bagchi
- Molecular Cell Biology Laboratory, Department of Zoology, University of Kalyani, Kalyani, India
| | - Ananya Banerjee
- Cancer Research Laboratory, Department of Zoology, University of Calcutta, Kolkata, India
| | - Himansu Roy
- Department of Surgery, Calcutta Medical College, Kolkata, India
| | | | - Arunima Biswas
- Molecular Cell Biology Laboratory, Department of Zoology, University of Kalyani, Kalyani, India
| | - Urmi Chatterji
- Cancer Research Laboratory, Department of Zoology, University of Calcutta, Kolkata, India.,Centre for Research in Nanoscience and Nanotechnology, University of Calcutta, Kolkata, India
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Bhaduri R, Pan A, Kumar Tarai S, Mandal S, Bagchi A, Biswas A, Ch. Moi S. In vitro anticancer activity of Pd(II) complexes with pyridine scaffold: Their bioactivity, role in cell cycle arrest, and computational study. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120540] [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: 11/08/2022]
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Kanodia R, Kumar R, Biswas A, Bhasker S. 251P Is QUAD SHOT palliative cyclical hypo-fractionated radiotherapy in advanced head and neck cancer the way to go? An alternative regimen in low resource countries. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.10.064] [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: 12/05/2022] Open
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Bhaduri R, Mandal S, Kumar Tarai S, Pan A, Mukherjee S, Bagchi A, Biswas A, Ch. Moi S. Cytotoxic activity of nitrogen, sulfur, and oxygen chelated Pt(II) complexes; their DNA/BSA binding by in vitro and in silico approaches. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119529] [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: 10/18/2022]
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Bhattacharya A, Fernandez-Prada C, Alonso GD, Biswas A. Editorial: Signaling in stress sensing and resistance in parasitic protozoa. Front Cell Infect Microbiol 2022; 12:962047. [PMID: 35967874 PMCID: PMC9372558 DOI: 10.3389/fcimb.2022.962047] [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] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Accepted: 06/08/2022] [Indexed: 11/21/2022] Open
Affiliation(s)
- Arijit Bhattacharya
- Deptartment of Biological Sciences, Adamas University, Kolkata, India
- *Correspondence: Arijit Bhattacharya, ; Christopher Fernandez-Prada, christopher.fernandez.prada @ umontreal.ca; Guillermo Daniel Alonso, ; Arunima Biswas,
| | - Christopher Fernandez-Prada
- Département de Pathologie et Microbiologie, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, QC, Canada
- *Correspondence: Arijit Bhattacharya, ; Christopher Fernandez-Prada, christopher.fernandez.prada @ umontreal.ca; Guillermo Daniel Alonso, ; Arunima Biswas,
| | - Guillermo Daniel Alonso
- CONICET Instituto de Investigaciones en Ingeniería Genética y Biología Molecular Dr. Héctor N. Torres (INGEBI), Buenos Aires, Argentina
- *Correspondence: Arijit Bhattacharya, ; Christopher Fernandez-Prada, christopher.fernandez.prada @ umontreal.ca; Guillermo Daniel Alonso, ; Arunima Biswas,
| | - Arunima Biswas
- Molecular Cell Biology Laboratory, Deptartment of Zoology, University of Kalyani, Kalyani, India
- *Correspondence: Arijit Bhattacharya, ; Christopher Fernandez-Prada, christopher.fernandez.prada @ umontreal.ca; Guillermo Daniel Alonso, ; Arunima Biswas,
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Biswas A, Amirabadi A, Wagner M, Ertl-Wagner B. Features of Visually AcceSAble Rembrandt Images: Interrater Reliability in Pediatric Brain Tumors. AJNR Am J Neuroradiol 2022; 43:304-308. [PMID: 35058297 PMCID: PMC8985665 DOI: 10.3174/ajnr.a7399] [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] [Received: 08/16/2021] [Accepted: 10/20/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND AND PURPOSE At present, no evidence-based lexicon exists for pediatric intracranial tumors. The Visually AcceSAble Rembrandt Images terminology describes reproducible MR imaging features of adult gliomas for prediction of tumor grade, molecular markers, and survival. Our aim was to assess the interrater reliability of the pre-resection features of Visually AcceSAble Rembrandt Images in pediatric brain tumors. MATERIALS AND METHODS Fifty consecutive pre-resection brain MR imaging examinations of pediatric intracranial neoplasms were independently reviewed by 3 neuroradiologists. The intraclass correlation coefficient for continuous variables and the Krippendorf alpha were used to evaluate the interrater agreement. Subgroup analysis was performed for 30 gliomas. RESULTS Parameters with almost perfect agreement (α > .8) included tumor location (F1) and proportion of enhancing tumor (F5). Parameters with substantial agreement (α = .61-.80) were side of tumor epicenter (F2), involvement of eloquent brain (F3), enhancement quality (F4), proportion of non-contrast-enhancing tumor (F6), and deep white matter invasion (F21). The other parameters showed either moderate (α = .41-.60; n = 11), fair (α = .21-.40; n = 5), or slight agreement (α = 0-.20; n = 1). Subgroup analysis of 30 gliomas showed almost perfect agreement for tumor location (F1), involvement of eloquent brain (F3), and proportion of enhancing tumor (F5); and substantial agreement for side of tumor epicenter (F2), enhancement quality (F4), proportion of noncontrast enhancing tumor (F6), cysts (F8), thickness of enhancing margin (F11), and deep white matter invasion (F21). The intraclass correlation coefficient for measurements in the axial plane was excellent in both the main group (0.984 [F29] and 0.982 [F30]) and the glioma subgroup (0.973 [F29] and 0.973 [F30]). CONCLUSIONS Nine features of Visually AcceSAble Rembrandt Images have an acceptable interrater agreement in pediatric brain tumors. For the subgroup of pediatric gliomas, 11 features of Visually AcceSAble Rembrandt Images have an acceptable interrater agreement. The low degree of reproducibility of the remainder of the features necessitates the use of features tailored to the pediatric age group and is likely related to the more heterogeneous imaging morphology of pediatric brain tumors.
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Affiliation(s)
- A. Biswas
- From the Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, Ontario, Canada,Department of Medical Imaging, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - A. Amirabadi
- From the Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, Ontario, Canada,Department of Medical Imaging, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - M.W. Wagner
- From the Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, Ontario, Canada,Department of Medical Imaging, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - B.B. Ertl-Wagner
- From the Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, Ontario, Canada,Department of Medical Imaging, University of Toronto, The Hospital for Sick Children, Toronto, Ontario, Canada
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Alshehri HM, Biswas A, González-Gaxiola O, Yildirim Y. Bright optical solitons with polynomial law of nonlinear refractive index by Adomian decomposition scheme. PEAS 2022. [DOI: 10.3176/proc.2022.3.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Biswas A, Natarajan M, Subramanian SK, Solomon JM. Development and feasibility testing of action observation training videos in acute stroke survivors: Preliminary findings. F1000Res 2022; 11:524. [PMID: 36891251 PMCID: PMC9986771 DOI: 10.12688/f1000research.118969.2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/04/2023] [Indexed: 02/11/2023] Open
Abstract
Background: Action observation training (AOT) is used for lower limb (LL) stroke rehabilitation in subacute and chronic stages, but concise information regarding the types of activities to be used and the feasibility of administration in the acute stroke population is unknown. The aim of this study was to develop and validate videos of appropriate activities for LL AOT and test administrative feasibility in acute stroke. Method: A video inventory of LL activities was created after a literature survey and expert scrutiny. Five stroke rehabilitation experts validated the videos per domains of relevance, comprehension, clarity, camera position and brightness. LL AOT was then tested on ten individuals with acute stroke for uncovering barriers for clinical use in a feasibility study. Participants watched the activities and attempted imitation of the same. Determination of administrative feasibility was undertaken via participant interviews. Results: Suitable LL activities for stroke rehabilitation were identified. Content validation of videos led to improvements in selected activities and video quality. Expert scrutiny led to further video processing to include different perspectives of view and speeds of projected movements. Barriers identified included inability to imitate actions shown in videos and increased distractibility for some participants. Conclusion: A video catalogue of LL activities was developed and validated. AOT was deemed safe and feasible for acute stroke rehabilitation and may be used in future research and clinical practice.
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Affiliation(s)
- Arunima Biswas
- Department of Physiotherapy, Manipal College of Health Professions,Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Manikandan Natarajan
- Department of Physiotherapy, Manipal College of Health Professions,Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.,Centre for Comprehensive Stroke Rehabilitation and Research, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Sandeep K Subramanian
- Department of Physiotherapy, Manipal College of Health Professions,Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.,Departments of Physical Therapy, Physician Assistant Studies and Rehabilitation Medicine, UT Health San Antonio, San Antonio, Texas, USA
| | - John M Solomon
- Department of Physiotherapy, Manipal College of Health Professions,Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.,Centre for Comprehensive Stroke Rehabilitation and Research, Manipal Academy of Higher Education, Manipal, 576104, India
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Alngar ME, Alzahrani AK, Belic MR, Biswas A, Ekici M, Khan S, Zayed EM. Optical solitons in fiber Bragg gratings with quadratic-cubic law of nonlinear refractive index and cubic-quartic dispersive reflectivity. PEAS 2022. [DOI: 10.3176/proc.2022.2.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Subramanian S, Biswas A, Alves C, Sudhakar S, Shekdar K, Krishnan P, Shroff M, Taranath A, Arrigoni F, Aldinger K, Leventer R, Dobyns W, Mankad K. ACTA2-Related Dysgyria: An Under-Recognized Malformation of Cortical Development. AJNR Am J Neuroradiol 2022; 43:146-150. [PMID: 34857515 PMCID: PMC8757559 DOI: 10.3174/ajnr.a7364] [Citation(s) in RCA: 3] [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] [Received: 08/11/2021] [Accepted: 09/27/2021] [Indexed: 01/03/2023]
Abstract
BACKGROUND AND PURPOSE Pathogenic variants in the ACTA2 gene cause a distinctive arterial phenotype that has recently been described to be associated with brain malformation. Our objective was to further characterize gyral abnormalities in patients with ACTA2 pathogenic variants as per the 2020 consensus recommendations for the definition and classification of malformations of cortical development. MATERIALS AND METHODS We performed a retrospective, multicentric review of patients with proved ACTA2 pathogenic variants, searching for the presence of malformations of cortical development. A consensus read was performed for all patients, and the type and location of cortical malformation were noted in each. The presence of the typical ACTA2 arterial phenotype as well as demographic and relevant clinical data was obtained. RESULTS We included 13 patients with ACTA2 pathogenic variants (Arg179His mutation, n = 11, and Arg179Cys mutation, n = 2). Ninety-two percent (12/13) of patients had peri-Sylvian dysgyria, 77% (10/13) had frontal dysgyria, and 15% (2/13) had generalized dysgyria. The peri-Sylvian location was involved in all patients with dysgyria (12/12). All patients with dysgyria had a characteristic arterial phenotype described in ACTA2 pathogenic variants. One patient did not have dysgyria or the characteristic arterial phenotype. CONCLUSIONS Dysgyria is common in patients with ACTA2 pathogenic variants, with a peri-Sylvian and frontal predominance, and was seen in all our patients who also had the typical ACTA2 arterial phenotype.
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Affiliation(s)
- S. Subramanian
- From the Division of Pediatric Radiology (S.S.), Department of Radiology, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania
| | - A. Biswas
- Department of Diagnostic Imaging (A.B., P.K., M.S.), The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | | | - S.V. Sudhakar
- Department of Radiology (S.V.S., K.M.), Great Ormond Street Hospital, NHS Foundation Trust, London, UK
| | - K.V. Shekdar
- Department of Radiology, and Department of Radiology (K.V.S.), Perelman School of Medicine at the University of Pennsylvania, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - P. Krishnan
- Department of Diagnostic Imaging (A.B., P.K., M.S.), The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - M. Shroff
- Department of Diagnostic Imaging (A.B., P.K., M.S.), The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - A. Taranath
- Department of Medical Imaging (A.T.), Women’s and Children’s Hospital, Adelaide, South Australia, Australia
| | - F. Arrigoni
- Neuroimaging Lab (F.A.), Scientific Institute, Istituto di Ricovero e Cura a Carattere Scientifico Eugenio Medea, Bosisio Parini, Italy
| | - K.A. Aldinger
- Department of Pediatrics (K.A.A.), University of Washington School of Medicine, Seattle, Washington,Center for Integrative Brain Research (K.A.A., W.B.D.), Seattle Children’s Research Institute, Seattle, Washington
| | - R.J. Leventer
- Department of Neurology (R.J.L.), Royal Children’s Hospital and Murdoch Children’s Research Institute, Parkville, Victoria, Australia,Department of Pediatrics (R.J.L.), University of Melbourne, Melbourne, Victoria, Australia
| | - W.B. Dobyns
- Center for Integrative Brain Research (K.A.A., W.B.D.), Seattle Children’s Research Institute, Seattle, Washington,Division of Genetics and Metabolism (W.B.D.), Department of Pediatrics, University of Minnesota, Minneapolis, Minnesota
| | - K. Mankad
- Department of Radiology (S.V.S., K.M.), Great Ormond Street Hospital, NHS Foundation Trust, London, UK
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Kinney MV, Day LT, Palestra F, Biswas A, Jackson D, Roos N, de Jonge A, Doherty P, Manu AA, Moran AC, George AS. Overcoming blame culture: key strategies to catalyse maternal and perinatal death surveillance and response. BJOG 2021; 129:839-844. [PMID: 34709701 PMCID: PMC9298870 DOI: 10.1111/1471-0528.16989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2021] [Indexed: 11/29/2022]
Affiliation(s)
- M V Kinney
- School of Public Health, University of the Western Cape, Bellville, South Africa
| | - L T Day
- Maternal Newborn Health Group, Maternal Adolescent, Reproductive and Child Health (MARCH) Centre, London School of Hygiene and Tropical Medicine, London, UK.,Maternal Newborn Health Group, Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK
| | - F Palestra
- World Health Organization, Geneva, Switzerland
| | | | - D Jackson
- School of Public Health, University of the Western Cape, Bellville, South Africa.,Maternal, Adolescent, Reproductive and Child Health (MARCH) Centre, London School of Hygiene & Tropical Medicine, London, UK
| | - N Roos
- Department of Medicine, Solna, Clinical Epidemiology Division, Karolinska Institutet, Stockholm, Sweden.,Karolinska University Hospital, Stockholm, Sweden
| | - A de Jonge
- Midwifery Science, AVAG (Academy Midwifery Amsterdam and Groningen), Amsterdam Public Health Research Institute, Amsterdam University Medical Centre, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.,University Medical Center Groningen, Groningen, The Netherlands
| | - P Doherty
- Options Consultancy Services Ltd, St Magnus House, London, UK
| | - A A Manu
- Epidemiology and Disease Control, School of Public Health, University of Ghana, Legon, Accra, Ghana
| | - A C Moran
- Department of Maternal, Newborn, Child, Adolescent Health & Ageing, World Health Organization, Geneva, Switzerland
| | - A S George
- School of Public Health, University of the Western Cape, Bellville, South Africa
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Vázquez-González Y, Prieto C, Filizoglu M, Ragazzo-Sánchez J, Calderón-Santoyo M, Furtado R, Cheng H, Biswas A, Lagaron J. Electrosprayed cashew gum microparticles for the encapsulation of highly sensitive bioactive materials. Carbohydr Polym 2021; 264:118060. [DOI: 10.1016/j.carbpol.2021.118060] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 03/15/2021] [Accepted: 04/06/2021] [Indexed: 12/22/2022]
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Pal M, Ramu V, Musib D, Kunwar A, Biswas A, Roy M. Iron(III) Complex-Functionalized Gold Nanocomposite as a Strategic Tool for Targeted Photochemotherapy in Red Light. Inorg Chem 2021; 60:6283-6297. [PMID: 33887143 DOI: 10.1021/acs.inorgchem.1c00001] [Citation(s) in RCA: 4] [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] [Indexed: 12/15/2022]
Abstract
Iron(III)-phenolate/carboxylate complexes exhibiting photoredox chemistry and photoactivated reactive oxygen species (ROS) generation at their ligand-to-metal charge-transfer (LMCT) bands have emerged as potential strategic tools for photoactivated chemotherapy. Herein, the synthesis, in-depth characterization, photochemical assays, and remarkable red light-induced photocytotoxicities in adenocarcinomic human immortalized human keratinocytes (HaCaT) and alveolar basal epithelial (A549) cells of iron(III)-phenolate/carboxylate complex of molecular formula, [Fe(L1)(L2)] (1), where L1 is bis(3,5 di-tert-butyl-2-hydroxybenzyl)glycine and L2 is 5-(1,2-dithiolan-3-yl)-N-(1,10-phenanthroline-5-yl)pentanamide, and the gold nanocomposite functionalized with complex 1 (1-AuNPs) are reported. There was a significant red shift in the UV-visible absorption band on functionalization of complex 1 to the gold nanoparticles (λmax: 573 nm, 1; λmax: 660 nm, 1-AuNPs), rendering the nanocomposite an ideal candidate for photochemotherapeutic applications. The notable findings in our present studies are (i) the remarkable cytotoxicity of the nanocomposite (1-AuNPs) to A549 (IC50: 0.006 μM) and HaCaT (IC50: 0.0075 μM) cells in red light (600-720 nm, 30 J/cm2) while almost nontoxic (IC50 > 500 μg/mL, 0.053 μM) in the dark, (ii) the nontoxicity of 1-AuNPs to normal human diploid fibroblasts (WI-38) or human peripheral lung epithelial (HPL1D) cells (IC50 > 500 μg/mL, 0.053 μM) both in the dark and red light signifying the target-specific anticancer activity of the nanocomposite, (iii) localization of 1-AuNPs in mitochondria and partly nucleus, (iv) remarkable red light-induced generation of reactive oxygen species (ROS: 1O2, •OH) in vitro, (v) disruption of the mitochondrial membrane due to enhanced oxidative stress, and (vi) caspase 3/7-dependent apoptosis. A similar cytotoxic profile of complex 1 was another key finding of our studies. Overall, our current investigations show a new red light-absorbing iron(III)-phenolate/carboxylate complex-functionalized gold nanocomposite (1-AuNPs) as the emerging next-generation iron-based photochemotherapeutic agent for targeted cancer treatment modality.
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Affiliation(s)
- Maynak Pal
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal West 795004, India
| | - Vanitha Ramu
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, CV Raman Avenue, Bangalore 560012, India
| | - Dulal Musib
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal West 795004, India
| | - Amit Kunwar
- Radiation and Photochemistry Division, Bhaba Atomic Research Center, Anushaktinagar, Mumbai 400085, India
| | - Arunima Biswas
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal West 795004, India
| | - Mithun Roy
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal West 795004, India
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35
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Ahlawat S, Srinivasu K, Biswas A, Choudhury N. Distortion energy-electronic energy compensation determines the nature of solute interactions with irradiation induced vacancies in ferritic steel. Phys Chem Chem Phys 2021; 23:8689-8704. [PMID: 33876029 DOI: 10.1039/d1cp00100k] [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: 11/21/2022]
Abstract
Fundamental knowledge of vacancy-solute atom (in particular, Cu and Ni) interactions at the electronic level is of utmost importance to understand experimentally observed Cu-precipitation in reactor pressure vessel (RPV) steel. In the present investigation, using first-principles electronic structure calculations within the framework of density functional theory (DFT), we unravel the nature of such interactions between a vacancy (V) or di-vacancy and solute atoms (mainly Cu and Ni) in the bcc-Fe lattice. One of the very novel features of the present investigation is that we demonstrate the importance of distortion energy-electronic energy compensation in stabilizing the formation of vacancy-Cu and vacancy-Ni clusters in ferritic steel. Further decomposition of the electronic energy contribution into different bonding contributions in conjugation with differential charge density analyses clearly reveals the origin of stability as a consequence of mutual compensation of different energy modes. For both Cu-Cu and Ni-Ni interactions, the presence of a vacancy leads to a more attractive interaction, implying that such vacancies generated due to irradiation make solute aggregation easier compared with the case of model steel with no defects. We have also demonstrated that the formation of CumNin clusters (m, n = 1, 5) is energetically favorable in addition to demonstrating that the stability increases with an increasing number of Cu or Ni atoms. The rate of increase of stability with the addition of solute atoms is higher in the case of the addition of Cu atoms into a Ni cluster than it is for adding Ni atoms into a Cu cluster. The present investigation thus provides a deeper electronic level understanding of solute-point defect interaction and cluster formation probability for Cu and Ni atoms in the ferritic steel.
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Affiliation(s)
- Sarita Ahlawat
- Material Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
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Sarkar P, Biswas A, Abharana N, Rai S, Modi MH, Bhattacharyya D. Interface modification of Cr/Ti multilayers with C barrier layer for enhanced reflectivity in the water window regime. J Synchrotron Radiat 2021; 28:224-230. [PMID: 33399572 DOI: 10.1107/s1600577520013429] [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] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 10/07/2020] [Indexed: 06/12/2023]
Abstract
The influence of a carbon barrier layer to improve the reflectivity of Cr/Ti multilayers, intended to be used in the water window wavelength regime, is investigated. Specular grazing-incidence X-ray reflectivity results of Cr/Ti multilayers with 10 bilayers show that interface widths are reduced to ∼0.24 nm upon introduction of a ∼0.3 nm C barrier layer at each Cr-on-Ti interface. As the number of bilayers increases to 75, a multilayer with C barrier layers maintains almost the same interface widths with no cumulative increase in interface imperfections. Using such interface-engineered Cr/C/Ti multilayers, a remarkably high soft X-ray reflectivity of ∼31.6% is achieved at a wavelength of 2.77 nm and at a grazing angle of incidence of 16.2°, which is the highest reflectivity reported so far in the literature in this wavelength regime. Further investigation of the multilayers by diffused grazing-incidence X-ray reflectivity and grazing-incidence extended X-ray absorption fine-structure measurements using synchrotron radiation suggests that the improvement in interface microstructure can be attributed to significant suppression of inter-diffusion at Cr/Ti interfaces by the introduction of C barrier layers and also due to the smoothing effect of the C layer promoting two-dimensional growth of the multilayer.
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Affiliation(s)
- P Sarkar
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - A Biswas
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - N Abharana
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - S Rai
- Synchrotron Utilisation Section, Raja Ramnna Centre for Advanced Technology, Indore 752013, India
| | - M H Modi
- Synchrotron Utilisation Section, Raja Ramnna Centre for Advanced Technology, Indore 752013, India
| | - D Bhattacharyya
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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Earp E, Mitchell A, Biswas A. A herpetiform eruption with unexpected immunofluorescence findings. Clin Exp Dermatol 2020; 46:207-209. [PMID: 33038038 DOI: 10.1111/ced.14461] [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] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/26/2020] [Accepted: 09/08/2020] [Indexed: 11/27/2022]
Affiliation(s)
- E Earp
- Department of Dermatology, Lauriston Building, Lauriston Place, Edinburgh, UK
| | - A Mitchell
- Department of Dermatology, Lauriston Building, Lauriston Place, Edinburgh, UK
| | - A Biswas
- Department of Pathology, Western General Hospital and The University of Edinburgh, Edinburgh, UK
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Affiliation(s)
- B Somu
- Department of Medicine, All India Institute of Medical Sciences, 3rd Floor Teaching Block, New Delhi 110029, India
| | - S Halkur Shankar
- Department of Medicine, All India Institute of Medical Sciences, 3rd Floor Teaching Block, New Delhi 110029, India
| | - U Baitha
- Department of Medicine, All India Institute of Medical Sciences, 3rd Floor Teaching Block, New Delhi 110029, India
| | - A Biswas
- Department of Medicine, All India Institute of Medical Sciences, 3rd Floor Teaching Block, New Delhi 110029, India
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Sharma A, Mohanti B, Thakar A, Bhasker S, Sikka K, Singh A, Pramanik R, Kumar R, Biswas A, Deo S, Thulkar S, Bahadur S. 959P Analysis of concurrent chemo-radiation using weekly cisplatin in locally advanced SCCHN: Identification of prognostic factors. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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40
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Biswas A, Krishnan P, Amirabadi A, Blaser S, Mercimek-Andrews S, Shroff M. Expanding the Neuroimaging Phenotype of Neuronal Ceroid Lipofuscinoses. AJNR Am J Neuroradiol 2020; 41:1930-1936. [PMID: 32855186 DOI: 10.3174/ajnr.a6726] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 06/16/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Neuronal ceroid lipofuscinoses are a group of neurodegenerative disorders characterized by the accumulation of autofluorescent lipopigments in neuronal cells. As a result of storage material in the brain and retina, clinical manifestations include speech delay, cognitive dysfunction, motor regression, epilepsy, vision loss, and early death. At present, 14 different ceroid lipofuscinosis (CLN) genes are known. Recently, the FDA approved the use of recombinant human proenzyme of tripeptidyl-peptidase 1 for CLN2 disease, while phase I/IIa clinical trials for gene therapy in CLN3 and CLN6 are ongoing. Early diagnosis is, therefore, key to initiating treatment and arresting disease progression. Neuroimaging features of CLN1, CLN2, CLN3, and CLN5 diseases are well-described, with sparse literature on other subtypes. We aimed to investigate and expand the MR imaging features of genetically proved neuronal ceroid lipofuscinoses subtypes at our institution and also to report the time interval between the age of disease onset and the diagnosis of neuronal ceroid lipofuscinoses. MATERIALS AND METHODS We investigated and analyzed the age of disease onset and neuroimaging findings (signal intensity in periventricular, deep, and subcortical white matter, thalami, basal ganglia, posterior limb of the internal capsule, insular/subinsular regions, and ventral pons; and the presence or absence of supratentorial and/or infratentorial atrophy) of patients with genetically proved neuronal ceroid lipofuscinoses at our institution. This group consisted of 24 patients who underwent 40 brain MR imaging investigations between 1993 and 2019, with a male preponderance (male/female ratio = 15:9). RESULTS The mean ages of disease onset, first brain MR imaging, and diagnosis of neuronal ceroid lipofuscinoses were 4.70 ± 3.48 years, 6.76 ± 4.49 years, and 7.27 ± 4.78 years, respectively. Findings on initial brain MR imaging included T2/FLAIR hypointensity in the thalami (n = 22); T2/FLAIR hyperintensity in the periventricular and deep white matter (n = 22), posterior limb of the internal capsule (n = 22), ventral pons (n = 19), and insular/subinsular region (n = 18); supratentorial (n = 21) and infratentorial atrophy (n = 20). Eight of 9 patients who had follow-up neuroimaging showed progressive changes. CONCLUSIONS We identified reported classic neuroimaging features in all except 1 patient with neuronal ceroid lipofuscinoses in our study. CLN2, CLN5, and CLN7 diseases showed predominant cerebellar-over-cerebral atrophy. We demonstrate that abnormal signal intensity in the deep white matter, posterior limb of the internal capsule, and ventral pons is more common than previously reported in the literature. We report abnormal signal intensity in the insular/subinsular region for the first time. The difference in the median time from disease onset and diagnosis was 1.5 years.
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Affiliation(s)
- A Biswas
- From the Department of Diagnostic Imaging (A.B., P.K., A.A., S.B., M.S.), The Hospital for Sick Children, Toronto, Canada asthik.biswas@sickkids
| | - P Krishnan
- From the Department of Diagnostic Imaging (A.B., P.K., A.A., S.B., M.S.), The Hospital for Sick Children, Toronto, Canada
| | - A Amirabadi
- From the Department of Diagnostic Imaging (A.B., P.K., A.A., S.B., M.S.), The Hospital for Sick Children, Toronto, Canada
| | - S Blaser
- From the Department of Diagnostic Imaging (A.B., P.K., A.A., S.B., M.S.), The Hospital for Sick Children, Toronto, Canada
| | - S Mercimek-Andrews
- Division of Clinical and Metabolic Genetics (S.M.-A.), Department of Pediatrics, University of Toronto, The Hospital for Sick Children, Toronto, Canada
| | - M Shroff
- From the Department of Diagnostic Imaging (A.B., P.K., A.A., S.B., M.S.), The Hospital for Sick Children, Toronto, Canada
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Olabi B, Biswas A, Tidman MJ. Interdigital lesions: it's a dog's life. Clin Exp Dermatol 2020; 45:1077-1079. [PMID: 32844479 DOI: 10.1111/ced.14372] [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] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 06/17/2020] [Indexed: 11/29/2022]
Affiliation(s)
- B Olabi
- Department of Dermatology, Lauriston Building, Edinburgh, UK
| | - A Biswas
- Department of Pathology, Western General Hospital and the University of Edinburgh, Edinburgh, UK
| | - M J Tidman
- Department of Dermatology, Lauriston Building, Edinburgh, UK
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Biswas A, Iakutkina O, Wang Q, Lei HC, Dressel M, Uykur E. Spin-Reorientation-Induced Band Gap in Fe_{3}Sn_{2}: Optical Signatures of Weyl Nodes. Phys Rev Lett 2020; 125:076403. [PMID: 32857538 DOI: 10.1103/physrevlett.125.076403] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 07/21/2020] [Indexed: 06/11/2023]
Abstract
Temperature- and frequency-dependent infrared spectroscopy identifies two contributions to the electronic properties of the magnetic kagome metal Fe_{3}Sn_{2}: two-dimensional Dirac fermions and strongly correlated flat bands. The interband transitions within the linearly dispersing Dirac bands appear as a two-step feature along with a very narrow Drude component due to intraband contribution. Low-lying absorption features indicate flat bands with multiple van Hove singularities. Localized charge carriers are seen as a Drude peak shifted to finite frequencies. The spectral weight is redistributed when the spins are reoriented at low temperatures; a sharp mode appears suggesting the opening of a gap due to the spin reorientation as the sign of additional Weyl nodes in the system.
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Affiliation(s)
- A Biswas
- 1. Physikalisches Institut, Universität Stuttgart, 70569 Stuttgart, Germany
| | - O Iakutkina
- 1. Physikalisches Institut, Universität Stuttgart, 70569 Stuttgart, Germany
| | - Q Wang
- Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
| | - H C Lei
- Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
| | - M Dressel
- 1. Physikalisches Institut, Universität Stuttgart, 70569 Stuttgart, Germany
| | - E Uykur
- 1. Physikalisches Institut, Universität Stuttgart, 70569 Stuttgart, Germany
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Saha A, Bhattacharjee A, Vij A, Das PK, Bhattacharya A, Biswas A. Evaluation of Modulators of cAMP-Response in Terms of Their Impact on Cell Cycle and Mitochondrial Activity of Leishmania donovani. Front Pharmacol 2020; 11:782. [PMID: 32670055 PMCID: PMC7326082 DOI: 10.3389/fphar.2020.00782] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 03/12/2020] [Accepted: 05/12/2020] [Indexed: 12/16/2022] Open
Abstract
With the identification of novel cAMP binding effector molecules in Trypanosoma, the role of cAMP in kinetoplastida parasites gained an intriguing breakthrough. Despite earlier demonstrations of the role of cAMP in the survival of Leishmania during macrophage infection, there is essential need to specifically clarify the involvement of cAMP in various cellular processes in the parasite. In this context, we sought to gain a comprehensive understanding of the effect of cAMP analogs and cAMP-cyclic nucleotide phosphodiesterase (PDE) inhibitors on proliferation of log phase parasites. Administration of both hydrolyzable (8-pCPT-cAMP) and nonhydrolyzable analogs (Sp-8-pCPT-cAMPS) of cAMP resulted in a significant decrease of Leishmania proliferation. Among the various PDE inhibitors, etazolate was found to be potently antiproliferative. BrdU cell proliferation and K/N/F-enumeration microscopic study revealed that both cAMP analogs and selective PDE inhibitors resulted in significant cell cycle arrest at G1 phase with reduced S-phase population. Furthermore, careful examination of the flagellar motility patterns revealed significantly reduced coordinated forward flagellar movement of the promastigotes with a concomitant decrease in cellular ATP levels. Alongside, 8-pCPT-cAMP and PDE inhibitors etazolate and trequinsin showed marked reduction in mitochondrial membrane potential. Treatment of etazolate at subcytotoxic concentration to infected macrophages significantly reduced parasite burden, and administration of etazolate to Leishmania-infected BALB/c mice showed reduced liver and spleen parasite burden. Collectively, these results imply involvement of cAMP in various crucial processes paving the avenue for developing potent antileishmanial agent.
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Affiliation(s)
- Amrita Saha
- Infectious Diseases and Immunology, CSIR-Indian Institute of Chemical Biology, Kolkata, India
| | - Anindita Bhattacharjee
- Department of Zoology, Cell and Molecular Biology Laboratory, University of Kalyani, Kalyani, India
| | - Amit Vij
- Infectious Diseases and Immunology, CSIR-Indian Institute of Chemical Biology, Kolkata, India
| | - Pijush K. Das
- Infectious Diseases and Immunology, CSIR-Indian Institute of Chemical Biology, Kolkata, India
| | - Arijit Bhattacharya
- Department of Microbiology, School of Life Sciences and Biotechnology, Adamas University, Kolkata, India
| | - Arunima Biswas
- Infectious Diseases and Immunology, CSIR-Indian Institute of Chemical Biology, Kolkata, India
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Dubey R, Yadav A, Pawar A, Biswas A. Comparing the outcome of progenitor (CD34+) Cell dose calculated using ideal body weight to actual body weight on engraftment of neutrophils and platelets after PBSC transplant. Cytotherapy 2020. [DOI: 10.1016/j.jcyt.2020.03.082] [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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Affiliation(s)
- V Kumar
- Department of Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - P Jorwal
- Department of Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - A Biswas
- Department of Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - V Deorari
- Department of Medicine, All India Institute of Medical Sciences, New Delhi, India
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Sharma A, Chaudhary M, Thakar A, Bhaskar S, Sikka K, Pramanik R, Biswas A, Singh C, Sahoo R, Deo S, Kumar R, Thulkar S, Kakkar A, Seth S, Sreenivas V. Concurrent chemotherapy and external radiation therapy: An open label non-inferiority phase III randomized controlled trial of weekly versus three weekly cisplatin and radical radiotherapy in locally advanced head and neck squamous cell carcinoma: CONCERT trial. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz252.064] [Citation(s) in RCA: 1] [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: 11/14/2022] Open
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47
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Biswas A, Saini D, Roy A, Mukherjee A, Gangopadhyay G. Can behavioral symptoms differentiate cortical from subcortical dementia - A comparative study of behavioral profile of Parkinson’s disease dementia and behavioral variant of frontotemporal dementia. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.246] [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]
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Devnani B, Gupta S, Haresh K, Biswas A, Pareek V, Batra M, Singh M, Tandon V, Julka P, Rath G. Impact of Adjuvant Therapy on Survival in Treatment of Central Nervous System Hemangiopericytoma. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.2224] [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: 10/26/2022]
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Affiliation(s)
- A. Majumdar
- Department of Electronics and Communication Engineering, National Institute of Technology Silchar, India
| | - N.M. Laskar
- Department of Electronics and Communication Engineering, National Institute of Technology Silchar, India
| | - A. Biswas
- Department of Electronics and Communication Engineering, National Institute of Technology Silchar, India
| | - S.K. Sood
- Department of Computer Science and Engineering, Guru Nanak Dev University, Regional Campus, Gurdaspur, Punjab, India
| | - K.L. Baishnab
- Department of Electronics and Communication Engineering, National Institute of Technology Silchar, India
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Dubey R, Asthana B, Kushwaha N, Pawar A, Biswas A, Yadav A, Marik A. A Novel approach for rbc depletion in abo incompatible allogenic peripheral blood stem cell transplant using modified hydroxyethyl starch method. Cytotherapy 2019. [DOI: 10.1016/j.jcyt.2019.03.439] [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: 10/26/2022]
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