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Kumar G, Gurao A, Vasisth R, Chitkara M, Singh R, Ranganatha Sriranga K, Shivanand Dige M, Mukesh M, Singh P, Singh Kataria R. Genome-wide 5'-C-phosphate-G-3' methylation patterns reveal the effect of heat stress on the altered semen quality in Bubalus bubalis. Gene 2024; 906:148233. [PMID: 38331117 DOI: 10.1016/j.gene.2024.148233] [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: 10/20/2023] [Revised: 01/25/2024] [Accepted: 01/29/2024] [Indexed: 02/10/2024]
Abstract
Semen production and quality are closely correlated with different environmental factors in bovines, particularly for the buffalo (Bubalus bubalis) bulls reared under tropical and sub-tropical conditions. Factors including DNA methylation patterns, an intricate process in sperm cells, have an impact on the production of quality semen in buffalo bulls under abiotic stress conditions. The present study was conducted to identify DNA methylome signatures for semen quality in Murrah buffalo bulls, acclaimed as a major dairy breed globally, under summer heat stress. Based on semen quality parameters that significantly varied between the two groups over the seasons, the breeding bulls were classified into seasonally affected (SA = 6) and seasonally non-affected (SNA = 6) categories. DNA was isolated from purified sperm cells and sequenced using the RRBS (Reduced Representation Bisulfite Sequencing) technique for genome-wide methylome data generation. During the hot summer months, the physiological parameters such as scrotal surface temperature, rectal temperature, and respiration rate for both the SA and SNA bulls were significantly higher in the afternoon than in the morning. Whereas, the global CpG% of SA bulls was positively correlated with the afternoon's scrotal surface and rectal temperature. The RRBS results conveyed differentially methylated cytosines in the promoter region of the genes encoding the channels responsible for Ca2+ exchange, NPTN, Ca2+ activated chloride channels, ANO1, and a few structure-related units such as septins (SEPT4 and SEPT6), SPATA, etc. Additionally, the hypermethylated set of genes in SA was significantly enriched for pathways such as the FOXO signaling pathway and oocyte meiosis. The methylation patterns suggest promoter methylation in the genes regulating the sperm structure as well as surface transporters, which could contribute to the reduced semen quality in the Murrah buffalo bulls during the season-related heat stress.
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Affiliation(s)
- Gautam Kumar
- ICAR-National Bureau of Animal Genetic Resources, Karnal (Haryana), India
| | - Ankita Gurao
- ICAR-National Bureau of Animal Genetic Resources, Karnal (Haryana), India
| | - Rashi Vasisth
- ICAR-National Bureau of Animal Genetic Resources, Karnal (Haryana), India
| | - Meenakshi Chitkara
- ICAR-National Bureau of Animal Genetic Resources, Karnal (Haryana), India
| | - Ravinder Singh
- ICAR-National Dairy Research Institute, Karnal (Haryana), India
| | | | | | - Manishi Mukesh
- ICAR-National Bureau of Animal Genetic Resources, Karnal (Haryana), India
| | - Pawan Singh
- ICAR-National Dairy Research Institute, Karnal (Haryana), India
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Srivastava A, Kumar G, Kumar P, Srikrishna S, Chandra P, Singh VP. Thiazole-Based Silver Ion Sensor for Sequential Colorimetric Visualization of Epinephrine in the Brain Tissues of an Alzheimer's Disease Model of Mouse. ACS Appl Bio Mater 2024. [PMID: 38654595 DOI: 10.1021/acsabm.4c00229] [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] [Indexed: 04/26/2024]
Abstract
A thiazole-based probe, N'-((2-aminothiazol-5-yl)methylene)benzohydrazide (TBH), has been efficiently synthesized and characterized for the selective and sensitive detection of the neurotransmitter epinephrine (EP). The sensing strategy is based on the use of TBH for sequential colorimetric sensing of Ag+ and EP via in situ formation of Ag nanoparticles (Ag NPs) from the TBH-Ag+ complex. The generated Ag NPs lead to a bathochromic shift in absorption maximum and a change in color of the solution from light brown to reddish brown. TBH-Ag+ shows remarkable selectivity toward EP versus other drugs, common cations, anions, and some biomolecules. Moreover, TBH-Ag+ has a low detection limit for EP at 1.2 nM. The coordination of TBH-Ag+ has been proposed based on Job's plot, Fourier transform infrared spectroscopy (FT-IR), high-resolution mass spectrometry (HRMS), 1H NMR titration, X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray analysis (EDAX), and density functional theory (DFT) studies. The composition and morphology of the generated Ag NPs have been analyzed by XPS, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and dynamic light scattering (DLS). The proposed sensing mechanism for EP has been supported by XPS of Ag after the reaction. Further, the sensitivity of TBH-Ag+ toward EP in brain tissues of an Alzheimer's disease model of mouse has been evaluated. A thorough comparison was done for evaluation of the proposed method.
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Affiliation(s)
- Ananya Srivastava
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Gautam Kumar
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Prabhat Kumar
- Department of Biochemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - S Srikrishna
- Department of Biochemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Pranjal Chandra
- School of Biochemical Engineering, Indian Institute of Technology (BHU), Varanasi 221005, India
| | - Vinod P Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
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Vasisth R, Gurao A, Chitkara M, Kumar G, Sriranga KR, Mukesh M, Dige MS, Singh P, Aggarwal RAK, Kataria RS. Selection of reference genes for normalizing gene expression data across seasons in spermatozoa of water buffalo (Bubalus bubalis). Int J Biometeorol 2024:10.1007/s00484-024-02675-9. [PMID: 38602552 DOI: 10.1007/s00484-024-02675-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 12/04/2023] [Accepted: 03/01/2024] [Indexed: 04/12/2024]
Abstract
Selection of the most stably expressed reference genes is key to monitoring accurate target gene expression across any tissue or cell type. The mRNA in spermatozoa stores valuable information related to changes in spermatogenesis due to variations in environmental conditions, especially during heat stress, which affects various sperm functions. Semen quality in buffalo bulls is significantly influenced by the seasons. In the study, a panel of nine genes was evaluated to identify the most stably expressed internal control gene (ICG) for the normalization of real-time gene expression data generated across various seasons for Murrah buffalo bulls' spermatozoa. Sperm cells were purified from the semen samples collected during different seasons, with temperature-humidity index (THI) ranging from 80.80 ± 1.47 (hot summer) to 55.88 ± 1.98 (winter), using the BoviPure™ gradient purification method. The RNA isolated from the purified spermatozoa fraction was quality checked prior to reverse transcription and subjected to qPCR (quantitative real-time PCR) based expression analysis. An automated 'endoGene' pipeline was employed to apply the geNorm, NormFinder, and BestKeeper algorithms for data analysis. The result indicated that GAPDH and PP1A were the most stably expressed among the gene panel, whereas ATPSF1 and ACTB were the two least stable expressed reference genes. Further, the most suitable ICGs identified were validated by normalization of real time expression data of heat stress and sperm quality genes, HSFY2 and AKAP4, respectively. The genes identified would help in generating the most reliable results for the expression profiling of the genes dictating sperm quality and heat stress cope-up mechanism in buffalo spermatozoa, collected during different seasons.
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Affiliation(s)
- Rashi Vasisth
- ICAR- National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
- ICAR- National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Ankita Gurao
- ICAR- National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
| | - Meenakshi Chitkara
- ICAR- National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
- ICAR- National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Gautam Kumar
- ICAR- National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
- ICAR- National Dairy Research Institute, Karnal, Haryana, 132001, India
| | | | - Manishi Mukesh
- ICAR- National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
| | | | - Pawan Singh
- ICAR- National Dairy Research Institute, Karnal, Haryana, 132001, India
| | | | - Ranjit Singh Kataria
- ICAR- National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India.
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Pandey V, Adhikrao PA, Motiram GM, Yadav N, Jagtap U, Kumar G, Paul A. Biaryl carboxamide-based peptidomimetics analogs as potential pancreatic lipase inhibitors for treating obesity. Arch Pharm (Weinheim) 2024; 357:e2300503. [PMID: 38251950 DOI: 10.1002/ardp.202300503] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/30/2023] [Accepted: 01/02/2024] [Indexed: 01/23/2024]
Abstract
A series of 1,1'-biphenyl-3-carboxamide and furan-phenyl-carboxamide analogs were synthesized using an optimized scheme and confirmed by 1H and 13C nuclear magnetic resonance and high-resolution mass spectrometry techniques. The synthesized peptidomimetics analogs were screened in vitro to understand the inhibitory potential of pancreatic lipase (PL). Analogs were assessed for the PL inhibitory activity based on interactions, geometric complementarity, and docking score. Among the synthesized analogs, 9, 29, and 24 were found to have the most potent PL inhibitory activity with IC50 values of 3.87, 4.95, and 5.34 µM, respectively, compared to that of the standard drug, that is, orlistat, which inhibits PL with an IC50 value of 0.99 µM. The most potent analog, 9, exhibited a competitive-type inhibition with an inhibition constant (Ki) of 2.72 µM. In silico molecular docking of analog 9 with the PL (PDB ID:1LPB) showed a docking score of -11.00 kcal/mol. Analog 9 formed crucial hydrogen bond interaction with Ser152, His263, π-cation interaction with Asp79, Arg256, and π-π stacking with Phe77, Tyr114 at the protein's active site. The molecular dynamic simulation confirmed that analog 9 forms stable interactions with PL at the end of 200 ns with root mean square deviation values of 2.5 and 6 Å. No toxicity was observed for analog 9 (concentration range of 1-20 µM) when tested by MTT assay in RAW 264.7 cells.
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Affiliation(s)
- Vikash Pandey
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research, Hyderabad, Telangana, India
| | - Patil A Adhikrao
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research, Hyderabad, Telangana, India
| | - Gudle M Motiram
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research, Hyderabad, Telangana, India
| | - Nisha Yadav
- Laboratory of Natural Product Chemistry, Department of Pharmacy, Birla Institute of Technology and Science, Pilani (Pilani Campus), Pilani, Rajasthan, India
| | - Utkarsh Jagtap
- Laboratory of Natural Product Chemistry, Department of Pharmacy, Birla Institute of Technology and Science, Pilani (Pilani Campus), Pilani, Rajasthan, India
| | - Gautam Kumar
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research, Hyderabad, Telangana, India
| | - Atish Paul
- Laboratory of Natural Product Chemistry, Department of Pharmacy, Birla Institute of Technology and Science, Pilani (Pilani Campus), Pilani, Rajasthan, India
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Kumar G, Sakharam KA. Tackling Influenza A virus by M2 ion channel blockers: Latest progress and limitations. Eur J Med Chem 2024; 267:116172. [PMID: 38330869 DOI: 10.1016/j.ejmech.2024.116172] [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: 11/09/2023] [Revised: 01/18/2024] [Accepted: 01/22/2024] [Indexed: 02/10/2024]
Abstract
Influenza outbreaks cause pandemics in millions of people. The treatment of influenza remains a challenge due to significant genetic polymorphism in the influenza virus. Also, developing vaccines to protect against seasonal and pandemic influenza infections is constantly impeded. Thus, antibiotics are the only first line of defense against antigenically distinct strains or new subtypes of influenza viruses. Among several anti-influenza targets, the M2 protein of the influenza virus performs several activities. M2 protein is an ion channel that permits proton conductance through the virion envelope and the deacidification of the Golgi apparatus. Both these functions are critical for viral replication. Thus, targeting the M2 protein of the influenza virus is an essential target. Rimantadine and amantadine are two well-known drugs that act on the M2 protein. However, these drugs acquired resistance to influenza and thus are not recommended to treat influenza infections. This review discusses an overview of anti-influenza therapy, M2 ion channel functions, and its working principle. It also discusses the M2 structure and its role, and the change in the structure leads to mutant variants of influenza A virus. We also shed light on the recently identified compounds acting against wild-type and mutated M2 proteins of influenza virus A. These scaffolds could be an alternative to M2 inhibitors and be developed as antibiotics for treating influenza infections.
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Affiliation(s)
- Gautam Kumar
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, Balanagar, 500037, India.
| | - Kakade Aditi Sakharam
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, Balanagar, 500037, India
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Damare R, Engle K, Kumar G. Targeting epidermal growth factor receptor and its downstream signaling pathways by natural products: A mechanistic insight. Phytother Res 2024. [PMID: 38433568 DOI: 10.1002/ptr.8166] [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: 08/02/2023] [Revised: 01/30/2024] [Accepted: 02/03/2024] [Indexed: 03/05/2024]
Abstract
The epidermal growth factor receptor (EGFR) is a transmembrane receptor tyrosine kinase (RTK) that maintains normal tissues and cell signaling pathways. EGFR is overactivated and overexpressed in many malignancies, including breast, lung, pancreatic, and kidney. Further, the EGFR gene mutations and protein overexpression activate downstream signaling pathways in cancerous cells, stimulating the growth, survival, resistance to apoptosis, and progression of tumors. Anti-EGFR therapy is the potential approach for treating malignancies and has demonstrated clinical success in treating specific cancers. The recent report suggests most of the clinically used EGFR tyrosine kinase inhibitors developed resistance to the cancer cells. This perspective provides a brief overview of EGFR and its implications in cancer. We have summarized natural products-derived anticancer compounds with the mechanistic basis of tumor inhibition via the EGFR pathway. We propose that developing natural lead molecules into new anticancer agents has a bright future after clinical investigation.
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Affiliation(s)
- Rutuja Damare
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, India
| | - Kritika Engle
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, India
| | - Gautam Kumar
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, India
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Kumar G, Srivastava A, Kumar P, Srikrishna S, Singh VP. A chromogenic diarylethene-based probe for the detection of Cu 2+ in aqueous medium in Drosophila for early diagnosis of Alzheimer. Heliyon 2024; 10:e24074. [PMID: 38230249 PMCID: PMC10789622 DOI: 10.1016/j.heliyon.2024.e24074] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/16/2023] [Accepted: 01/03/2024] [Indexed: 01/18/2024] Open
Abstract
A diarylethene-based probe (Z)-N'-((2-amino-5-chlorophenyl)(phenyl)methylene)-2-hydroxy benzohydrazide (KBH) has been proficiently developed and its structure has been confirmed by single crystal X-ray diffraction technique. It displays a selective and sensitive colorimetric sensing of Cu2+ ions in aqueous medium with a naked eye colour change from colourless to yellow. It exhibits a significantly low limit of detection as 1.5 nM. A plausible binding mechanism has been proposed using Job's plot, FT-IR, 1H NMR titration, HRMS and DFT studies. The chemosensor is effectively reversible and reusable with EDTA. Test strip kit and real water sample analysis have been shown to establish its practical applicability. Further, the potential of KBH for the early diagnosis of Cu2+ ion-induced amyloid toxicity has been investigated in eye imaginal disc of Alzheimer's disease model of Drosophila 3rd instar larvae. The in-vivo interaction of KBH with Cu2+ in gut tissues of Drosophila larvae establishes its sensing capability in biological system. Interestingly, the in-vivo detection of Cu2+ has been done using bright field imaging which eliminates the necessity of a fluorescent label, hence making the method highly economical.
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Affiliation(s)
- Gautam Kumar
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Ananya Srivastava
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Prabhat Kumar
- Department of Bio Chemistry, Institute of Science, Banaras Hindu University, Varanasi, India
| | - S. Srikrishna
- Department of Bio Chemistry, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Vinod P. Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, India
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Calarco CA, Keppetipola SM, Kumar G, Shipper AG, Lobo MK. Whole blood mitochondrial copy number in clinical populations with mood disorders: A meta-analysis: Blood mitochondrial copy number and mood disorders. Psychiatry Res 2024; 331:115662. [PMID: 38118327 DOI: 10.1016/j.psychres.2023.115662] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/01/2023] [Accepted: 12/02/2023] [Indexed: 12/22/2023]
Abstract
Major depressive disorder (MDD) and bipolar disorder (BD), are globally prevalent, contributing to significant disease burden and adverse health outcomes. These mood disorders are associated with changes in many aspects of brain reward pathways, yet cellular and molecular changes in the brain are not readily available in clinical populations. Therefore, the use of biomarkers as proxies for changes in the brain are necessary. The proliferation of mitochondria in blood has emerged as a potentially useful biomarker, yet a clear consensus on how these mood disorders impact mitochondrial DNA copy number (mtDNAcn) has not been reached. To determine the current available consensus on the relationship of mood disorder diagnosis and blood mtDNcn, we performed a meta-analysis of available literature measuring this biomarker. Following PRISMA guidelines for a systematic search, 22 papers met inclusion criteria for meta-analysis (10 MDD, 10 BD, 2 both MDD and BD). We extracted demographic, disorder, and methodological information with mtDNAcn. Using the metafor package for R, calculated effect sizes were used in random effects or meta regression models for MDD and BD. Overall, our data suggest blood mtDNAcn may be a useful biomarker for mood disorders, with MDD and BD Type II associated with higher mtDNAcn, and BD Type I associated with lower mtDNAcn. Initially, we observed a trending increase in mtDNAcn in patients with MDD, which reached significance when one study with outlying demographic characteristics was excluded. Subgroup and meta-regression analysis indicated the relationship between mtDNAcn and diagnosis in patients with BD is dependent on BD type, while no relationship is detectable when BD types are mixed. Further study of blood mtDNAcn could predict downstream health outcomes or treatment responsivity in individuals with mood disorders.
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Affiliation(s)
- Cali A Calarco
- Department of Neurobiology, University of Maryland, 20 Penn Street, Baltimore, MD 21201 USA
| | | | - Gautam Kumar
- Department of Neurobiology, University of Maryland, 20 Penn Street, Baltimore, MD 21201 USA
| | - Andrea G Shipper
- Health Sciences and Human Services Library, University of Maryland, 601W. Lombard Street, Baltimore, MD 21201, USA
| | - Mary Kay Lobo
- Department of Neurobiology, University of Maryland, 20 Penn Street, Baltimore, MD 21201 USA.
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Matsumura M, Maehara A, Davis JE, Kumar G, Sharp A, Samady H, Seto AH, Cohen D, Patel MR, Ali ZA, Stone GW, Jeremias A. Changes in post-PCI physiology based on anatomical vessel location: a DEFINE PCI substudy. EUROINTERVENTION 2023; 19:e903-e912. [PMID: 38031488 PMCID: PMC10719742 DOI: 10.4244/eij-d-23-00517] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 09/24/2023] [Indexed: 12/01/2023]
Abstract
BACKGROUND Anatomical vessel location affects post-percutaneous coronary intervention (PCI) physiology. AIMS We aimed to compare the post-PCI instantaneous wave-free ratio (iFR) in left anterior descending (LAD) versus non-LAD vessels and to identify the factors associated with a suboptimal post-PCI iFR. METHODS DEFINE PCI was a multicentre, prospective, observational study in which a blinded post-PCI iFR pullback was used to assess residual ischaemia following angiographically successful PCI. RESULTS Pre- and post-PCI iFR recordings of 311 LAD and 195 non-LAD vessels were compared. Though pre-PCI iFR in the LAD vessels (median 0.82 [0.63, 0.86]) were higher compared with those in non-LAD vessels (median 0.72 [0.49, 0.84]; p<0.0001), post-PCI iFR were lower in the LAD vessels (median 0.92 [0.88, 0.94] vs 0.98 [0.95, 1.00]; p<0.0001). The prevalence of a suboptimal post-PCI iFR of <0.95 was higher in the LAD vessels (77.8% vs 22.6%; p<0.0001). While the overall frequency of residual physiological diffuse disease (31.4% vs 38.6%; p=0.26) and residual focal disease in the non-stented segment (49.6% vs 50.0%; p=0.99) were similar in both groups, residual focal disease within the stented segment was more common in LAD versus non-LAD vessels (53.7% vs 27.3%; p=0.0009). Improvement in iFR from pre- to post-PCI was associated with angina relief regardless of vessel location. CONCLUSIONS After angiographically successful PCI, post-PCI iFR is lower in the LAD compared with non-LAD vessels, resulting in a higher prevalence of suboptimal post-PCI iFR in LAD vessels. This difference is, in part, due to a greater frequency of a residual focal pressure gradient within the stented segment which may be amenable to more aggressive PCI.
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Affiliation(s)
| | - Akiko Maehara
- Cardiovascular Research Foundation, New York, NY, USA
- Columbia University Irving Medical Center, New York, NY, USA
| | - Justin E Davis
- Hammersmith Hospital, Imperial College NHS Trust, London, United Kingdom
| | | | - Andrew Sharp
- Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
| | | | | | - David Cohen
- Cardiovascular Research Foundation, New York, NY, USA
- St. Francis Hospital, Roslyn, NY, USA
| | | | - Ziad A Ali
- Cardiovascular Research Foundation, New York, NY, USA
- St. Francis Hospital, Roslyn, NY, USA
| | - Gregg W Stone
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Allen Jeremias
- Cardiovascular Research Foundation, New York, NY, USA
- St. Francis Hospital, Roslyn, NY, USA
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Kumar G, Sharma N, Paul A. An extremely lightweight CNN model for the diagnosis of chest radiographs in resource-constrained environments. Med Phys 2023; 50:7568-7578. [PMID: 37665774 DOI: 10.1002/mp.16722] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 06/29/2023] [Accepted: 08/06/2023] [Indexed: 09/06/2023] Open
Abstract
BACKGROUND In recent years, deep learning methods have been successfully used for chest x-ray diagnosis. However, such deep learning models often contain millions of trainable parameters and have high computation demands. As a result, providing the benefits of cutting-edge deep learning technology to areas with low computational resources would not be easy. Computationally lightweight deep learning models may potentially alleviate this problem. PURPOSE We aim to create a computationally lightweight model for the diagnosis of chest radiographs. Our model has only 0.14M parameters and 550 KB size. These make the proposed model potentially useful for deployment in resource-constrained environments. METHODS We fuse the concept of depthwise convolutions with squeeze and expand blocks to design the proposed architecture. The basic building block of our model is called Depthwise Convolution In Squeeze and Expand (DCISE) block. Using these DCISE blocks, we design an extremely lightweight convolutional neural network model (ExLNet), a computationally lightweight convolutional neural network (CNN) model for chest x-ray diagnosis. RESULTS We perform rigorous experiments on three publicly available datasets, namely, National Institutes of Health (NIH), VinBig ,and Chexpert for binary and multi-class classification tasks. We train the proposed architecture on NIH dataset and evaluate the performance on VinBig and Chexpert datasets. The proposed method outperforms several state-of-the-art approaches for both binary and multi-class classification tasks despite having a significantly less number of parameters. CONCLUSIONS We design a lightweight CNN architecture for the chest x-ray classification task by introducing ExLNet which uses a novel DCISE blocks to reduce the computational burden. We show the effectiveness of the proposed architecture through various experiments performed on publicly available datasets. The proposed architecture shows consistent performance in binary as well as multi-class classification tasks and outperforms other lightweight CNN architectures. Due to a significant reduction in the computational requirements, our method can be useful for resource-constrained clinical environment as well.
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Affiliation(s)
- Gautam Kumar
- Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan, India
| | - Nirbhay Sharma
- Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan, India
| | - Angshuman Paul
- Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan, India
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Chowdari Gurram P, Satarker S, Kumar G, Begum F, Mehta C, Nayak U, Mudgal J, Arora D, Nampoothiri M. Avanafil mediated dual inhibition of IKKβ and TNFR1 in an experimental paradigm of Alzheimer's disease: in silico and in vivo approach. J Biomol Struct Dyn 2023; 41:10659-10677. [PMID: 36533331 DOI: 10.1080/07391102.2022.2156924] [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: 08/26/2022] [Accepted: 12/05/2022] [Indexed: 12/23/2022]
Abstract
In Alzheimer's disease pathology, inhibitors of nuclear factor kappa-β kinase subunit β (IKKB) and Tumor necrosis factor receptor 1 (TNFR1) signaling are linked to neuroinflammation-mediated cognitive decline. We explored the role of a phosphodiesterase 5 inhibitor (PDE5I) with dual antagonistic action on IKKB and TNFR1 to inhibit nuclear factor kappa B (NF-kB) and curb neuroinflammation. In the in silico approach, the FDA-approved Zinc 15 library was docked with IKKB and TNFR1. The top compound with dual antagonistic action on IKKB and TNFR1 was selected based on bonding and non-bonding interactions. Further, induced fit docking (IFD), molecular mechanics-generalized Born and surface area (MMGBSA), and molecular dynamic studies were carried out and evaluated. Lipopolysaccharide (LPS) administration caused a neuroinflammation-mediated cognitive decline in mice. Two doses of avanafil were administered for 28 days while LPS was administered for 10 days. Morris water maze (MWM) along with the passive avoidance test (PAT) were carried out. Concurrently brain levels of inflammatory markers, oxidative parameters, amyloid beta (Aβ), IKKB and NF-kB levels were estimated. Avanafil produced good IKKB and TNFR1 binding ability. It interacted with crucial inhibitory amino acids of IKKB and TNFR1. MD analysis predicted good stability of avanafil with TNFR1 and IKKB. Avanafil 6 mg/kg could significantly improve performance in MWM, PAT and oxidative parameters and reduce Aβ levels and inflammatory markers. As compared to avanafil 3 mg/kg, 6 mg/kg dose was found to exert better efficacy against elevated Aβ , neuroinflammatory cytokines and oxidative markers while improving behavioural parameters.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Prasada Chowdari Gurram
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Sairaj Satarker
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Gautam Kumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Farmiza Begum
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Chetan Mehta
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Usha Nayak
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Jayesh Mudgal
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Devinder Arora
- School of Pharmacy and Medical Sciences, Griffith University, Gold Coast, QLD, Australia
| | - Madhavan Nampoothiri
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, India
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Meka ST, Bojja SL, Kumar G, Birangal SR, Rao CM. Novel HDAC inhibitors provide neuroprotection in MPTP-induced Parkinson's disease model of rats. Eur J Pharmacol 2023; 959:176067. [PMID: 37751833 DOI: 10.1016/j.ejphar.2023.176067] [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: 05/05/2023] [Revised: 07/13/2023] [Accepted: 09/19/2023] [Indexed: 09/28/2023]
Abstract
Parkinson's Disease (PD) is the most rapidly growing neurological disorder globally in terms of disability and mortality. While symptomatic treatment is available for PD, there is a critical unmet need for effective disease-modifying therapies. Recently, histone deacetylase inhibitors (HDACi), an important class of epigenetic modulators grabbed significant attention as drug targets for neurodegenerative diseases including PD. In this regard, novel pan-HDACi, cinnamyl sulphonamide hydroxamate derivatives (NMJ-2 and NMJ-3), synthesized and characterized in our laboratory, were screened for neuroprotective effects in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) rat model of PD. Twenty-four hours after the bilateral intranigral injection of MPTP, rats were administered orally with NMJ-2 or NMJ-3 (150 mg/kg) daily for 30 days. MPTP administration resulted in a marked rise in lipid peroxidation, and interleukin-1β concentration accompanied by reduced tyrosine hydroxylase and dopamine levels in the striatum compared to the sham group. These biochemical changes were associated with functional motor and non-motor deficits as revealed by loss of motor coordination (rota rod test), impaired grip strength (beam walk test), enhanced rigidity (catalepsy scores), loss of memory (novel object recognition test) and depressive-like behaviour (forced swim test). However, oral treatment with NMJ-2 or NMJ-3, or valproic acid for 30 days significantly attenuated the PD-induced adverse changes in motor and non-motor functions by ameliorating the oxidative stress as well as inflammation, and restoring the dopamine levels in the striatum comparable to the valproic acid group. These results suggest that targeting HDACi could be a rational therapeutic strategy for the development of disease-modifying therapies for PD.
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Affiliation(s)
- Sai Teja Meka
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Sree Lalitha Bojja
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Gautam Kumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India; Department of Pharmacy, Sharda University, Greater Noida, Uttar Pradesh 201310, India
| | - Sumit Raosaheb Birangal
- Department of Pharmaceutical Chemistry, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - C Mallikarjuna Rao
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India.
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13
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Kumar G, Mullick P, Nandakumar K, Mutalik S, Chamallamudi MR. Box-Behnken Design-Aided Validation and Optimization of a Stability-Indicating Reverse Phase-HPLC Method for the Estimation of Tamoxifen Citrate in Lipidic Nano-Vesicles. J Chromatogr Sci 2023; 61:827-837. [PMID: 37554069 DOI: 10.1093/chromsci/bmad059] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 04/23/2023] [Indexed: 08/10/2023]
Abstract
Stability indicating a reverse-phase HPLC analytical method for the quantification of tamoxifen citrate (TMX) in the bulk and lipidic nano-vesicles (LNVs) was developed. The optimized method was validated according to the ICH Q2 (R1) guidelines by following a three-factor interaction Box-Behnken design using Design-Expert® software. The responses measured at 236 nm were retention time (Rt), peak area, tailing factor (TF) and the number of theoretical plates. TMX was eluted best using the Luna® C18 LC Column along with a mobile phase of methanol (MeOH) and ammonium acetate buffer (AAB pH 4.5) 80:20 v/v mixture at 25 ± 2°C temperature. The currently developed method was linear in 100-5,000 ng/mL range with a detection limit of 4.55 ng/mL and a quantification limit of 13.78 ng/mL. The optimized method was utilized to evaluate the stability of TMX in different stress conditions by performing forced degradation studies. The results from the degradation study stipulated that on exposure to various stressors namely acid, alkali, oxidative, thermal and UV light, the TMX did not show considerable degradation except for UV light exposure. Further, the method was successfully used for the quantification of TMX in LNVs.
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Affiliation(s)
- Gautam Kumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
- School of Pharmacy, Sharda University, Greater Noida, Uttar Pradesh 201310, India
| | - Prashansha Mullick
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Krishnadas Nandakumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Srinivas Mutalik
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Mallikarjuna Rao Chamallamudi
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
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Basu S, Kumari S, Subhadarshini P, Rishu AK, Shekhar S, Kumar G. Plant growth promoting rhizobacterium Bacillus sp. BSE01 alleviates salt toxicity in chickpea (Cicer arietinum L.) by conserving ionic, osmotic, redox and hormonal homeostasis. Physiol Plant 2023; 175:e14076. [PMID: 38148224 DOI: 10.1111/ppl.14076] [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: 07/10/2023] [Accepted: 10/25/2023] [Indexed: 12/28/2023]
Abstract
Soil salinity leading to sodium toxicity is developing into a massive challenge for agricultural productivity globally, inducing osmotic, ionic, and redox imbalances in plants. Considering the predicted increase in salinization risk with the ongoing climate change, applying plant growth-promoting rhizobacteria (PGPR) is an environmentally safe method for augmenting plant salinity tolerance. The present study examined the role of halotolerant Bacillus sp. BSE01 as a promising biostimulant for improving salt stress endurance in chickpea. Application of PGPR significantly increased the plant height, relative water content, and chlorophyll content of chickpea under both non-stressed and salt stress conditions. The PGPR-mediated tolerance towards salt stress was accomplished by the modulation of hormonal signaling and conservation of cellular ionic, osmotic, redox homeostasis. With salinity stress, the PGPR-treated plants significantly increased the indole-3-acetic acid and gibberellic acid contents more than the non-treated plants. Furthermore, the PGPR-inoculated plants maintained lower 1-aminocyclopropane-1-carboxylic acid and abscisic acid contents under salt treatment. The PGPR-inoculated chickpea plants also exhibited a decreased NADPH oxidase activity with reduced production of reactive oxygen species compared to the non-inoculated plants. Additionally, PGPR treatment led to increased antioxidant enzyme activities in chickpea under saline conditions, facilitating the reactive nitrogen and oxygen species detoxification, thereby limiting the nitro-oxidative damage. Following salinity stress, enhanced K+ /Na+ ratio and proline content were noted in the PGPR-inoculated chickpea plants. Therefore, Bacillus sp. BSE01, being an effective PGPR and salinity stress reducer, can further be considered to develop a bioinoculant for sustainable chickpea production under saline environments.
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Affiliation(s)
- Sahana Basu
- Department of Life Science, Central University of South Bihar, Gaya, India
| | - Surbhi Kumari
- Department of Life Science, Central University of South Bihar, Gaya, India
| | | | - Aniket Kumar Rishu
- Department of Life Science, Central University of South Bihar, Gaya, India
| | - Shashi Shekhar
- Department of Farm Engineering, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India
| | - Gautam Kumar
- Department of Life Science, Central University of South Bihar, Gaya, India
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Olusakin J, Kumar G, Basu M, Calarco CA, Fox ME, Alipio JB, Haga C, Turner MD, Keller A, Ament SA, Lobo MK. Transcriptomic profiling of reward and sensory brain areas in perinatal fentanyl exposed juvenile mice. Neuropsychopharmacology 2023; 48:1724-1734. [PMID: 37400565 PMCID: PMC10579237 DOI: 10.1038/s41386-023-01639-8] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 06/14/2023] [Accepted: 06/16/2023] [Indexed: 07/05/2023]
Abstract
Use of the synthetic opioid fentanyl increased ~300% in the last decade, including among women of reproductive ages. Adverse neonatal outcomes and long-term behavioral disruptions are associated with perinatal opioid exposure. Our previous work demonstrated that perinatal fentanyl exposed mice displayed enhanced negative affect and somatosensory circuit and behavioral disruptions during adolescence. However, little is known about molecular adaptations across brain regions that underlie these outcomes. We performed RNA sequencing across three reward and two sensory brain areas to study transcriptional programs in perinatal fentanyl exposed juvenile mice. Pregnant dams received 10 μg/ml fentanyl in the drinking water from embryonic day 0 (E0) through gestational periods until weaning at postnatal day 21 (P21). RNA was extracted from nucleus accumbens (NAc), prelimbic cortex (PrL), ventral tegmental area (VTA), somatosensory cortex (S1) and ventrobasal thalamus (VBT) from perinatal fentanyl exposed mice of both sexes at P35. RNA sequencing was performed, followed by analysis of differentially expressed genes (DEGs) and gene co-expression networks. Transcriptome analysis revealed DEGs and gene modules significantly associated with exposure to perinatal fentanyl in a sex-wise manner. The VTA had the most DEGs, while robust gene enrichment occurred in NAc. Genes enriched in mitochondrial respiration were pronounced in NAc and VTA of perinatal fentanyl exposed males, extracellular matrix (ECM) and neuronal migration enrichment were pronounced in NAc and VTA of perinatal fentanyl exposed males, while genes associated with vesicular cycling and synaptic signaling were markedly altered in NAc of perinatal fentanyl exposed female mice. In sensory areas from perinatal fentanyl exposed females, we found alterations in mitochondrial respiration, synaptic and ciliary organization processes. Our findings demonstrate distinct transcriptomes across reward and sensory brain regions, with some showing discordance between sexes. These transcriptome adaptations may underlie structural, functional, and behavioral changes observed in perinatal fentanyl exposed mice.
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Affiliation(s)
- Jimmy Olusakin
- Department of Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA
- Program in Neuroscience, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Gautam Kumar
- Department of Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA
- Program in Neuroscience, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Mahashweta Basu
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Cali A Calarco
- Department of Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA
- Program in Neuroscience, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Megan E Fox
- Department of Anesthesiology, Penn State College of Medicine, Hershey, PA, USA
| | - Jason B Alipio
- Department of Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA
- Program in Neuroscience, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Catherine Haga
- Department of Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA
- Program in Neuroscience, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Makeda D Turner
- Department of Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Asaf Keller
- Department of Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA
- Program in Neuroscience, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Seth A Ament
- Program in Neuroscience, University of Maryland School of Medicine, Baltimore, MD, USA
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Mary Kay Lobo
- Department of Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA.
- Program in Neuroscience, University of Maryland School of Medicine, Baltimore, MD, USA.
- Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD, USA.
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16
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Desai R, Mohammed AS, Gurram P, Srikanth S, Vyas A, Katukuri N, Sanku K, Paul TK, Kumar G, Sachdeva R. Predicting Risk of Cardiac Arrest in Young Asian Americans: Insights from an Artificial Neural Network Analysis of the Nationwide Cohort. Curr Probl Cardiol 2023; 48:101939. [PMID: 37423314 DOI: 10.1016/j.cpcardiol.2023.101939] [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: 06/29/2023] [Accepted: 07/04/2023] [Indexed: 07/11/2023]
Abstract
We used the Artificial Neural Network (ANN) model to identify predictors of Sudden Cardiac Arrest (SCA) in a national cohort of young Asian patients in the United States. The National Inpatient Sample (2019) was used to identify young Asians (18-44-year-old) who were hospitalized with SCA. The neural network's predicted criteria for SCA were selected. After eliminating missing data, young Asians (n = 65,413) were randomly divided into training (n = 45,094) and testing (n = 19347) groups. Training data (70%) was used to calibrate ANN while testing data (30%) was utilized to assess the algorithm's accuracy. To determine ANN's performance in predicting SCA, we compared the frequency of incorrect prediction between training and testing data and measured the area under the Receiver Operating Curve (AUC). The 2019 young Asian cohort had 327,065 admissions (median age 32 years; 84.2% female), with SCA accounting for 0.21%. The exact rate of error in predictions vs. tests was shown by training data (0.2% vs 0.2%). In descending order, the normalized importance of predictors to accurately predict SCA in young adults included prior history of cardiac arrest, sex, age, diabetes, anxiety disorders, prior coronary artery bypass grafting, hypertension, congenital heart disease, income, peripheral vascular disease, and cancer. The AUC was 0.821, indicating an excellent ANN model for SCA prediction. Our ANN models performed excellently in revealing the order of important predictors of SCA in young Asian American patients. These findings could have a considerable impact on clinical practice to develop risk prediction models to improve the survival outcome in high-risk patients.
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Affiliation(s)
- Rupak Desai
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA.
| | - Adil Sarvar Mohammed
- Department of Internal Medicine, Central Michigan University College of Medicine, Saginaw, MI
| | - Priyatham Gurram
- Internal Medicine, Mamata Medical College, Khammam, Telangana, India
| | - Sashwath Srikanth
- Department of Internal Medicine, East Carolina University, Brody School of Medicine, Greenville, NC
| | - Ankit Vyas
- Department of Internal Medicine, Baptist Hospitals of Southeast Texas, Beaumont, TX
| | | | - Koushik Sanku
- Department of Internal Medicine, East Tennessee State University, Johnson City, TN
| | - Timir K Paul
- University of Tennessee Health Sciences Center at Nashville, Saint Thomas Heart Institute, Nashville, TN
| | - Gautam Kumar
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA; Division of Cardiology, Emory University School of Medicine, Atlanta, GA
| | - Rajesh Sachdeva
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA
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Padaraju A, Dwivedi F, Kumar G. Microemulsions, nanoemulsions and emulgels as carriers for antifungal antibiotics. Ther Deliv 2023; 14:721-740. [PMID: 38014430 DOI: 10.4155/tde-2023-0076] [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: 11/29/2023] Open
Abstract
According to estimates, up to 25% of the world's population has fungal skin diseases, making them the most prevalent infectious disease. Several chemical classes of antifungal drugs are available to treat fungal infections. However, the major challenges of conventional formulations of antifungal drugs include poor pharmacokinetic profiles like solubility, low permeability, side effects and decreased efficacy. Novel drug delivery is a promising approach for overcoming pharmacokinetic limitations and increasing the effectiveness of antibiotics. In this review, we have shed light on microemulsions, nanoemulsions, and emulgels as novel drug delivery approaches for the topical delivery of antifungal antibiotics. We believe these formulations have potential translational value and could be developed for treating fungal infections in humans.
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Affiliation(s)
- Annapurna Padaraju
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education & Research-Hyderabad, Hyderabad, Balanagar, 500037, India
| | - Falguni Dwivedi
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education & Research-Hyderabad, Hyderabad, Balanagar, 500037, India
| | - Gautam Kumar
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education & Research-Hyderabad, Hyderabad, Balanagar, 500037, India
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18
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Chen BH, Kumar G, Wei YJ, Ma HH, Kao JC, Chou PJ, Chuang YC, Chen IC, Chou JP, Lo YC, Huang MH. Experimental Revelation of Surface and Bulk Lattices in Faceted Cu 2 O Crystals. Small 2023; 19:e2303491. [PMID: 37381620 DOI: 10.1002/smll.202303491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/09/2023] [Indexed: 06/30/2023]
Abstract
Semiconductor crystals have generally shown facet-dependent electrical, photocatalytic, and optical properties. These phenomena have been proposed to result from the presence of a surface layer with bond-level deviations. To provide experimental evidence of this structural feature, synchrotron X-ray sources are used to obtain X-ray diffraction (XRD) patterns of polyhedral cuprous oxide crystals. Cu2 O rhombic dodecahedra display two distinct cell constants from peak splitting. Peak disappearance during slow Cu2 O reduction to Cu with ammonia borane differentiates bulk and surface layer lattices. Cubes and octahedra also show two peak components, while diffraction peaks of cuboctahedra are comprised of three components. Temperature-varying lattice changes in the bulk and surface regions also show shape dependence. From transmission electron microscopy (TEM) images, slight plane spacing deviations in surface and inner crystal regions are measured. Image processing provides visualization of the surface layer with depths of about 1.5-4 nm giving dashed lattice points instead of dots from atomic position deviations. Close TEM examination reveals considerable variation in lattice spot size and shape for different particle morphologies, explaining why facet-dependent properties are emerged. Raman spectrum reflects the large bulk and surface lattice difference in rhombic dodecahedra. Surface lattice difference can change the particle bandgap.
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Affiliation(s)
- Bo-Hao Chen
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
- National Synchrotron Radiation Research Center, Hsinchu, 300092, Taiwan
| | - Gautam Kumar
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Yu-Jung Wei
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Hsueh-Heng Ma
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Jui-Cheng Kao
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Po-Jung Chou
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Yu-Chun Chuang
- National Synchrotron Radiation Research Center, Hsinchu, 300092, Taiwan
| | - I-Chia Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Jyh-Pin Chou
- Department of Physics, National Changhua University of Education, Changhua, 50007, Taiwan
| | - Yu-Chieh Lo
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Michael H Huang
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
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Mukherjee A, Kumar G, Panda S. Response to: Prognostic factors for COVID-19 infected inpatients with chronic diseases. QJM 2023; 116:887-888. [PMID: 37335860 DOI: 10.1093/qjmed/hcad128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Indexed: 06/21/2023] Open
Affiliation(s)
- A Mukherjee
- Indian Council of Medical Research, New Delhi 110029, India
| | - G Kumar
- Indian Council of Medical Research, New Delhi 110029, India
| | - S Panda
- Indian Council of Medical Research, New Delhi 110029, India
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Kumar G, Adhikrao PA. Targeting Mycobacterium tuberculosis iron-scavenging tools: a recent update on siderophores inhibitors. RSC Med Chem 2023; 14:1885-1913. [PMID: 37859726 PMCID: PMC10583813 DOI: 10.1039/d3md00201b] [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: 04/28/2023] [Accepted: 08/22/2023] [Indexed: 10/21/2023] Open
Abstract
Among the various bacterial infections, tuberculosis (TB) remains a life-threatening infectious disease responsible as the most significant cause of mortality and morbidity worldwide. The co-infection of human immunodeficiency virus (HIV) in association with TB burdens the healthcare system substantially. Notably, M.tb possesses defence against most antitubercular antibiotic drugs, and the efficacy of existing frontline anti-TB drugs is waning. Also, new and recurring cases of TB from resistant bacteria such as multidrug-resistant TB (MDR), extensively drug-resistant TB (XDR), and totally drug-resistant TB (TDR) strains are increasing. Hence, TB begs the scientific community to explore the new therapeutic class of compounds with their novel mechanism. M.tb requires iron from host cells to sustain, grow, and carry out several biological processes. M.tb has developed strategic methods of acquiring iron from the surrounding environment. In this communication, we discuss an overview of M.tb iron-scavenging tools. Also, we have summarized recently identified MbtA and MbtI inhibitors, which prevent M.tb from scavenging iron. These iron-scavenging tool inhibitors have the potential to be developed as anti-TB agents/drugs.
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Affiliation(s)
- Gautam Kumar
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad (NIPER-Hyderabad) Balanagar Hyderabad 500037 India
| | - Patil Amruta Adhikrao
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad (NIPER-Hyderabad) Balanagar Hyderabad 500037 India
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Abstract
Covering: 2015 to 2022Staphylococcus aureus (S. aureus) is responsible for several community and hospital-acquired infections with life-threatening complications such as bacteraemia, endocarditis, meningitis, liver abscess, and spinal cord epidural abscess. In recent decades, the abuse and misuse of antibiotics in humans, animals, plants, and fungi and the treatment of nonmicrobial diseases have led to the rapid emergence of multidrug-resistant pathogens. The bacterial wall is a complex structure consisting of the cell membrane, peptidoglycan cell wall, and various associated polymers. The enzymes involved in bacterial cell wall synthesis are established antibiotic targets and continue to be a central focus for antibiotic development. Natural products play a vital role in drug discovery and development. Importantly, natural products provide a starting point for active/lead compounds that sometimes need modification based on structural and biological properties to meet the drug criteria. Notably, microorganisms and plant metabolites have contributed as antibiotics for noninfectious diseases. In this study, we have summarized the recent advances in understanding the activity of the drugs or agents of natural origin that directly inhibit the bacterial membrane, membrane components, and membrane biosynthetic enzymes by targeting membrane-embedded proteins. We also discussed the unique aspects of the active mechanisms of established antibiotics or new agents.
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Affiliation(s)
- Gautam Kumar
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, Balanagar, 500037, India.
| | - Kritika Engle
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, Balanagar, 500037, India.
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Desai R, Mondal A, Prasad A, Vyas A, Jain A, Rupareliya C, Shah M, Paul T, Kumar G, Sachdeva R. Concurrent Cardio-Cerebral Infarctions in COVID-19: A Systematic Review of Published Case Reports/Series. Curr Probl Cardiol 2023; 48:101814. [PMID: 37209804 PMCID: PMC10193814 DOI: 10.1016/j.cpcardiol.2023.101814] [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: 05/11/2023] [Accepted: 05/13/2023] [Indexed: 05/22/2023]
Abstract
Twelve CCI patients were studied with confirmed or suspected COVID-19 infection. The majority of these patients were males (83.3%) with a median age of 55 years from three geographical locations, constituting the Middle East (7), Spain (3), and the USA (1). In 6 patients, IgG/IgM was positive for COVID-19, 4 with high pretest probability and 2 with positive RT-PCR. Type 2 DM, hyperlipidemia, and smoking were the primary risk factors. Right-sided neurological impairments and verbal impairment were the most common symptoms. Our analysis found 8 (66%) synchronous occurrences. In 58.3% of cases, neuroimaging showed left Middle Cerebral Artery (MCA) infarct and 33.3% right. Carotid artery thrombosis (16.6%), tandem occlusion (8.3%), and carotid stenosis (1%) were also reported in imaging. Dual antiplatelet therapy (DAPT) and anticoagulants were conservative therapies (10). Two AMI patients had aspiration thrombectomy, while three AIS patients had intravenous thrombolysis/tissue plasminogen activator (IVT-tPA), 2 had mechanical thrombectomy (MT), and 1 had decompressive craniotomy. Five had COVID-19-positive chest X-rays, whereas 4 were normal. four of 8 STEMI and 3 NSTEMI/UA patients complained chest pain. LV, ICA, and pulmonary embolism were further complications (2). Upon discharge, 7 patients (70%) had residual deficits while 1 patient unfortunately died.
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Affiliation(s)
- Rupak Desai
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA.
| | - Avilash Mondal
- Department of Internal Medicine, Nazareth Hospital, Philadelphia, PA
| | | | - Ankit Vyas
- Department of Internal Medicine, Baptist Hospitals of Southeast Texas, Beaumont, TX
| | - Akhil Jain
- Department of Internal Medicine, Mercy Catholic Medical Center, Darby, PA
| | - Chintan Rupareliya
- Department of Vascular Neurology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Manan Shah
- Department of Neurocritical Care, Department of Neurology and Neurosurgery, Medical College of Georgia at Augusta University, Augusta, GA
| | - Timir Paul
- Division of Cardiology, University of Tennessee Health Sciences Center at Nashville, Saint Thomas Heart Institute, Nashville, TN
| | - Gautam Kumar
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA; Division of Cardiology, Emory University School of Medicine, Atlanta, GA
| | - Rajesh Sachdeva
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA
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Hussain B, Markson F, Mamas MA, Alraies C, Aggarwal V, Kumar G, Desai R, Paul TK. Effects of Valvular Heart Disease on Clinical Outcomes in Sarcoidosis. Curr Probl Cardiol 2023; 48:101866. [PMID: 37301487 DOI: 10.1016/j.cpcardiol.2023.101866] [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: 05/31/2023] [Accepted: 06/04/2023] [Indexed: 06/12/2023]
Abstract
Systemic sarcoidosis can lead to heart failure, conduction abnormalities and ventricular arrhythmias although data on concomitant valvular heart disease (VHD) is limited. We reported the prevalence and outcomes of VHD in systemic sarcoidosis. A retrospective cohort study was conducted using National Inpatient Sample between 2016 and 2020 with respective ICD-10-CM codes. 406,315 patients were hospitalized with sarcoidosis, out of which 20,570 had comorbid VHD (5.1%). Mitral disease was most common (2.5%), followed by aortic, and tricuspid disease. Tricuspid disease was associated with increased mortality in sarcoidosis (OR 1.6, 95% CI, 1.1-2.6, P = 0.04), while aortic disease was associated with higher mortality in only 31-50 years age cohort. Patients with sarcoidosis and VHD have higher hospitalization charges and lower or similar valvular intervention rates than those without sarcoidosis. VHD has a prevalence of 5% in sarcoidosis, predominantly affecting mitral and aortic valves. Underlying VHD is associated with worse outcomes in sarcoidosis.
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Affiliation(s)
- Bilal Hussain
- Internal Medicine, The Brooklyn Hospital Center, Brooklyn, NY
| | | | - Mamas A Mamas
- Cardiovascular Research Group, Keele University, Stoke-on-Trent, UK
| | - Chadi Alraies
- Division of Cardiology, Wayne State University/Detroit Medical Center, Detroit, MI
| | - Vikas Aggarwal
- Division of Cardiology, University of Michigan, Ann Arbor, MI
| | - Gautam Kumar
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA
| | - Rupak Desai
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA
| | - Timir K Paul
- University of Tennessee Health Sciences Center at Nashville, Ascension St. Thomas Hospital, Nashville, TN.
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Chandal N, Tambat R, Kalia R, Kumar G, Mahey N, Jachak S, Nandanwar H. Efflux pump inhibitory potential of indole derivatives as an arsenal against norA over-expressing Staphylococcus aureus. Microbiol Spectr 2023; 11:e0487622. [PMID: 37754560 PMCID: PMC10581058 DOI: 10.1128/spectrum.04876-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 07/11/2023] [Indexed: 09/28/2023] Open
Abstract
NorA, an extensively studied efflux pump in Staphylococcus aureus, has been connected to fluoroquinolone, antiseptic, and disinfection resistance. Several studies have also emphasized how efflux pumps, including NorA, function as the first line of defense of S. aureus against antibiotics. In this study, we have screened some chemically synthesized indole derivatives for their activity as efflux pump inhibitors (EPIs). The derivative SMJ-5 was found to be a potent NorA efflux pump inhibitor among the screened indole derivatives, owing to increased ethidium bromide and norfloxacin accumulation in norA over-expressing S. aureus. The combination of SMJ-5 and ciprofloxacin demonstrated the eradication of S. aureus biofilm and prolonged the post-antibiotic effect more than ciprofloxacin alone. SMJ-5 was able to inhibit staphyloxanthin virulence. In in vitro time-kill trials and in vivo efficacy investigations, the combination enhanced the bactericidal activity of ciprofloxacin against S. aureus. Additionally, reverse transcription PCR results revealed that SMJ-5 also inhibits the NorA efflux pump indirectly at the transcriptional level. IMPORTANCE The NorA efflux pump is the most effective resistance mechanism in S. aureus. The clinical importance of NorA efflux pumps is demonstrated by the expression of pump genes in S. aureus strains in response to fluoroquinolones and biocides. Along with the repercussions of decreased fluoroquinolone sensitivity, increasing expression of efflux pump genes by their substrate necessitates the importance of efflux pump inhibitors. Reserpine and verapamil are clinically used to treat ailments and have proven NorA inhibitors, but, unfortunately, the concentration needed for these drugs to inhibit the pump is not safe in clinical settings. In the current study, we have screened some indole derivatives, and among them, SMJ-5 was reported to potentiate norfloxacin and ciprofloxacin at their sub-inhibitory concentration by inhibiting the norA gene transcriptionally. Here we highlight the promising points of this study, which could serve as a model to design a therapeutic EPI candidate against norA over-expressing S. aureus.
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Affiliation(s)
- Nishtha Chandal
- Clinical Microbiology and Antimicrobial Research Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Rushikesh Tambat
- Clinical Microbiology and Antimicrobial Research Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Ritu Kalia
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Mohali, Punjab, India
| | - Gautam Kumar
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research- Hyderabad, Balanagar, Telangana, India
| | - Nisha Mahey
- Clinical Microbiology and Antimicrobial Research Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Sanjay Jachak
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Mohali, Punjab, India
| | - Hemraj Nandanwar
- Clinical Microbiology and Antimicrobial Research Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
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Calarco CA, Keppetipola SM, Kumar G, Shipper AG, Lobo MK. Whole blood mitochondrial copy number in clinical populations with mood disorders: a meta-analysis. bioRxiv 2023:2023.09.13.557572. [PMID: 37745411 PMCID: PMC10515896 DOI: 10.1101/2023.09.13.557572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Background Major depressive disorder (MDD) and bipolar disorder (BD), are globally prevalent, contributing to significant disease burden and adverse health outcomes. These mood disorders are associated with changes in many aspects of brain reward pathways, yet cellular and molecular changes in the brain are not readily available in clinical populations. Therefore, the use of biomarkers as proxies for changes in the brain are necessary. The proliferation of mitochondria in blood has emerged as a potentially useful biomarker, yet a clear consensus on how these mood disorders impact mitochondrial DNA copy number (mtDNAcn) has not been reached. Methods Following PRISMA guidelines for a systematic search, 22 papers met inclusion criteria for meta-analysis (10 MDD, 10 BD, 2 both MDD and BD). We extracted demographic, disorder, and methodological information with mtDNAcn. Using the metafor package for R, calculated effect sizes were used in random effects or meta regression models for MDD and BD. Results Our results show a trending increase in mtDNAcn in patients with MDD, which reaches significance when one study with outlying demographic characteristics is excluded. Overall, there was no effect of BD on mtDNAcn, however, further subgroup and meta-regression analysis indicated the effects on mtDNAcn are dependent on BD type. Conclusions Together our data suggest whole blood/leukocyte mtDNAcn may be a useful biomarker for mood disorders, with MDD and BD Type II associated with higher mtDNAcn, and BD Type I associated with lower mtDNAcn. Further study of blood mtDNAcn could predict downstream health outcomes or treatment responsivity in individuals with mood disorders.
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Desai R, Mishra V, Chhina AK, Jain A, Vyas A, Allamneni R, Lavie CJ, Sachdeva R, Kumar G. Cardiovascular Disease Risk Factors and Outcomes of Acute Myocardial Infarction in Young Adults: Evidence From 2 Nationwide Cohorts in the United States a Decade Apart. Curr Probl Cardiol 2023; 48:101747. [PMID: 37087077 DOI: 10.1016/j.cpcardiol.2023.101747] [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: 04/09/2023] [Accepted: 04/17/2023] [Indexed: 04/24/2023]
Abstract
The purpose of this study was to evaluate 2 national in-patient cohorts of young adults (18-44 years) hospitalized with acute myocardial infarction (AMI) a decade apart to highlight its prevalence, associated comorbidities, and in-hospital outcomes. We identified hospitalizations for AMI in young adults in 2007 and 2017 using the weighted data from the National Inpatient Sample. We compared admission rates, sociodemographic characteristics, in-hospital morbidity, complications, mortality, rate of coronary interventions, and healthcare utilization between the 2 cohorts. We found that the admission rate of AMI increased among young adults in 2017 vs 2007. The overall admission rate was higher in males, although with a decline (77.1% vs 66.1%), whereas it rose from 28.9% to 33.9% in females. Hypertension (47.8% vs 60.7%), smoking (49.7% vs 55.8%), obesity (14.8% vs 26.8%), and diabetes mellitus (22.0% vs 25.6%) increased in the 2017 cohort. Post-AMI complications: cardiogenic shock (aOR = 1.16 [1.06-1.27]) and fatal arrhythmias heightened with comparable all-cause mortality (aOR = 1.01 [0.93-1.10], P = 0.749). Reperfusion interventions, percutaneous coronary intervention (PCI) and coronary artery bypass grafting (CABG) decreased in the 2017 cohort (PCI; aOR = 0.95 [0.91-0.98], CABG; aOR = 0.66 [0.61-0.71], P < 0.001). Our study highlights the rise in AMI hospitalizations, plateauing of mortality, sex-based and racial disparities, the surge in post-MI complications, and a reassuring decline in the requirement of reperfusion interventions in young AMI patients over the decade.
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Affiliation(s)
- Rupak Desai
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA.
| | - Vinayak Mishra
- Department of Medicine, House Officer, Grant Medical College and Sir JJ Hospital, Mumbai, India
| | | | - Akhil Jain
- Department of Internal Medicine, Mercy Catholic Medical Center, Darby, PA
| | - Ankit Vyas
- Department of Internal Medicine, Baptist Hospitals of Southeast Texas Beaumont, Beaumont, TX
| | - Rakesh Allamneni
- Department of Hospital Medicine, Medstar Harbor Hospital, Baltimore, MD
| | - Carl J Lavie
- Department of Cardiovascular Diseases, John Ochsner Heart and Vascular Institute, Ochsner Clinical School-the University of Queensland School of Medicine, New Orleans, LA
| | - Rajesh Sachdeva
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA
| | - Gautam Kumar
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA; Division of Cardiology, Emory University School of Medicine, Atlanta, GA
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Kumar G, Brown MJ, Smith E, Benjamin E, McDaniel M, Sachdeva R. Case Series of Patients With Intermediate-High Risk Pulmonary Embolism in the Setting of Trauma Undergoing Mechanical Thrombectomy. Cardiovasc Revasc Med 2023; 54:63-66. [PMID: 37030980 DOI: 10.1016/j.carrev.2023.04.003] [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: 11/14/2022] [Revised: 01/23/2023] [Accepted: 04/04/2023] [Indexed: 04/10/2023]
Abstract
In patients with pulmonary embolism (PE) in the setting of trauma, administration of fibrinolytic therapy is contraindicated due to high risk of hemorrhage. Several studies have demonstrated the safety and efficacy of mechanical thrombectomy among all-comers with PE as an alternative to catheter-directed thrombolytics. However, the risks and benefits of mechanical thrombectomy treatment for pulmonary embolism in a trauma population are not well established. A retrospective analysis was performed in all patients who presented to Level 1 Trauma Center with acute trauma who were found to have a pulmonary embolism (PE) treated with mechanical thrombectomy. From May 2019 to December 2020, six patients were identified. Average age was 54 years, and four patients were male. Four patients had a saddle PE on computed tomography. All patients had an intermediate-high risk PE with troponin I elevation >0.04 ng/mL (average 0.42 ng/mL). Pulmonary Embolism Severity Index (PESI) score in all six patients was class III or IV. In all patients, the mechanical thrombectomy was performed with mean-PA pressure changing from average 40.33 to 31.5 mmHg. Average Intensive Care Unit (ICU) length of stay post-procedure was five days with two patients not requiring ICU stay. No patient had post-operative bleeding during their index stay. Average hemoglobin drop after mechanical thrombectomy was 1.33 g/dL. One patient died <30 days post-procedure due to septic shock and another >90 days later (5 months) from cardiac arrest from recurrent PE. The other four patients were still living >90 days post-procedure. No immediate or delayed postoperative complications were identified. Mechanical thrombectomy appears to be a safe and effective treatment for patients with recent trauma who have an intermediate-high risk pulmonary embolism.
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Affiliation(s)
- Gautam Kumar
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA, United States of America; Division of Cardiology, Atlanta VA Medical Center, Decatur, GA, United States of America
| | - Matthew J Brown
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA, United States of America
| | - Emily Smith
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA, United States of America
| | - Elizabeth Benjamin
- Department of Surgery, Emory University School of Medicine, Atlanta, GA, United States of America
| | - Michael McDaniel
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA, United States of America
| | - Rajesh Sachdeva
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA, United States of America.
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Begum F, Manandhar S, Kumar G, Keni R, Sankhe R, Gurram PC, Beegum F, Teja MS, Nandakumar K, Shenoy RR. Dehydrozingerone promotes healing of diabetic foot ulcers: a molecular insight. J Cell Commun Signal 2023; 17:673-688. [PMID: 36280629 PMCID: PMC10409929 DOI: 10.1007/s12079-022-00703-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 09/26/2022] [Indexed: 11/26/2022] Open
Abstract
INTRODUCTION One of the most common problems of diabetes are diabetic foot ulcers (DFUs). According to National Institute for Health, initial management of DFUs can decrease the complication of limb amputations and can improve the patient's quality of life. DFU treatment can be optimized with the help of multidisciplinary approach. Based on many studies, control of glucose levels in blood, antioxidant activity, reduction in cytokine levels, re-epithelialization, collagen formation, migration of fibroblasts are major phases involved in managing DFU. Dehydrozingerone (DHZ), has been known for its anti-inflammatory, antioxidant and wound healing properties. METHODOLOGY Three months high-fat diet and low dose of streptozotocin-induced type-II diabetic foot ulcer model was used to evaluate the effectiveness of dehydrozingerone. DHZ was given orally to rats for 15 days post wounding. TNF-α, IL-1β and antioxidant parameters like lipid peroxidation, glutathione reductase were estimated. Immunoblotting was done to investigate the effect of DHZ on the expression of ERK, JNK, HSP-27, P38, SIRT-1, NFκB, SMA, VEGF and MMP-9 in skin tissue. Histopathology was performed for analyzing DHZ effect on migration of fibroblasts, formation of epithelium, granulation tissue formation, angiogenesis and collagen formation. RESULTS DHZ decreased the levels of malondialdehyde, TNF-α, IL-1β and increased glutathione levels in wound tissue. Western blotting results suggested that DHZ activated ERK1/2/JNK/p38 signaling, increased expression of HSP-27, SIRT-1, VEGF, SMA thus facilitating the migration and proliferation of fibroblasts, angiogenesis and decreased inflammation. Masson Trichrome & histopathology showed an increase in collagen, epithelial and granulation tissue formation. CONCLUSION DHZ significantly accelerates the healing of diabetic foot ulcers in high fat diet fed plus low dose streptozotocin induced type-II diabetic Wistar rats.
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Affiliation(s)
- Farmiza Begum
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Suman Manandhar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Gautam Kumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Raghuvir Keni
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Runali Sankhe
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Prasada Chowdari Gurram
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Fathima Beegum
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Meka Sai Teja
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Krishnadas Nandakumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Rekha R Shenoy
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.
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Kumar G, Srivastava A, Kumar P, Srikrishna S, Singh VP. Fluorescent Turn-On Anthracene-Based Aluminum(III) Sensor for a Therapeutic Study in Alzheimer's Disease Model of Drosophila. ACS Chem Neurosci 2023; 14:2792-2801. [PMID: 37436111 DOI: 10.1021/acschemneuro.3c00340] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [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: 07/13/2023] Open
Abstract
A new anthracene-based probe (E)-N'-(1-(anthracen-9-yl)ethylidene)-2-hydroxybenzohydrazide (AHB) has been efficiently synthesized and characterized by various spectroscopic methods. It exhibits extremely selective and sensitive fluorometric sensing of Al3+ ions with a large enhancement in the fluorescent intensity due to the restricted photoinduced electron transfer (PET) mechanism with a chelation-enhanced fluorescence (CHEF) effect. The AHB-Al3+ complex shows a remarkably low limit of detection at 0.498 nM. The binding mechanism has been proposed based on Job's plot, 1H NMR titration, Fourier transform infrared (FT-IR), high-resolution mass spectrometry (HRMS), and density functional theory (DFT) studies. The chemosensor is reusable and reversible in the presence of ctDNA. The practical usability of the fluorosensor has been established by a test strip kit. Further, the therapeutic potential of AHB against Al3+ ion-induced tau protein toxicity has been tested in the eye of Alzheimer's disease (AD) model of Drosophila via metal chelation therapy. AHB shows great therapeutic potential with 53.3% rescue in the eye phenotype. The in vivo interaction study of AHB with Al3+ in the gut tissue of Drosophila confirms its sensing efficiency in the biological environment. A detailed comparison table included evaluates the effectiveness of AHB.
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Affiliation(s)
- Gautam Kumar
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Ananya Srivastava
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Prabhat Kumar
- Department of Bio Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - S Srikrishna
- Department of Bio Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Vinod P Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
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Vasisth R, Gurao A, Kumari N, Kumar G, Kumar A, Sriranga KR, Dige MS, Mukesh M, Aggarwal RAK, Singh P, Kataria RS. Development and validation of most efficient RNA isolation method from buffalo bull spermatozoa. Mol Biol Rep 2023; 50:6717-6727. [PMID: 37378747 DOI: 10.1007/s11033-023-08593-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023]
Abstract
BACKGROUND Being highly fragmented and low in concentration, isolation of good quality RNA from sperm cells is a big challenge. Attempts have been made to evaluate various sperm RNA isolation methods from purified buffalo bull sperm cells. METHODS Both, non-membrane and membrane-based methods have been evaluated for isolating RNA from Murrah buffalo sperms and compared for their respective efficacies. The traditional TRIzol, TRIzol-heat lysed (H-TRIzol) and cocktail of TCEP-RLT lysis buffer (Qiagen RNeasy mini kit)-TRIzol (C-TRIzol) based isopropanol isolation methods have been evaluated. RESULTS H-TRIzol yielded best results among conventional methods. The combined T-RLT RNA isolation protocol yielded best quality and quantity compared to other membrane-based methods, due to high lytic property of cocktail of lysis reagents, necessary for complete breakdown of sperm membrane and RNA binding membrane for RNA isolation. Combined lysis performed by treatment with RLT-T and T-RLT differing in order of reagents used were also evaluated. T-RLT combination giving better results compared to RLT-T due to high gDNA contamination and membrane clogging in later protocol steps. CONCLUSION Overall, in terms of total RNA quantity and quality per million spermatozoa, the heat-lysed TRIzol method (H-TRIzol) performs best among RNA separation techniques employed and is also quite easy to perform. This comparative evaluation of sperm RNA isolation protocols can be useful in deciding the best protocol for isolation of good quality and high concentration sperm RNA from buffalo semen, for transcriptome and other downstream studies.
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Affiliation(s)
- Rashi Vasisth
- Animal Biotechnology Division, ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
- ICAR-National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Ankita Gurao
- Animal Biotechnology Division, ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
| | - Namita Kumari
- Animal Biotechnology Division, ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
| | - Gautam Kumar
- Animal Biotechnology Division, ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
| | - Anurag Kumar
- Animal Biotechnology Division, ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
| | | | - Mahesh Shivanand Dige
- Animal Biotechnology Division, ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
| | - Manishi Mukesh
- Animal Biotechnology Division, ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
| | - Rajeev Anand Kumar Aggarwal
- Animal Biotechnology Division, ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India
| | - Pawan Singh
- ICAR-National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Ranjit Singh Kataria
- Animal Biotechnology Division, ICAR-National Bureau of Animal Genetic Resources, Karnal, Haryana, 132001, India.
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Kumar G, C A. Natural products and their analogues acting against Mycobacterium tuberculosis: A recent update. Drug Dev Res 2023; 84:779-804. [PMID: 37086027 DOI: 10.1002/ddr.22063] [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: 11/25/2022] [Revised: 02/28/2023] [Accepted: 04/01/2023] [Indexed: 04/23/2023]
Abstract
Tuberculosis (TB) remains one of the deadliest infectious diseases caused by Mycobacterium tuberculosis (M.tb). It is responsible for significant causes of mortality and morbidity worldwide. M.tb possesses robust defense mechanisms against most antibiotic drugs and host responses due to their complex cell membranes with unique lipid molecules. Thus, the efficacy of existing front-line drugs is diminishing, and new and recurring cases of TB arising from multidrug-resistant M.tb are increasing. TB begs the scientific community to explore novel therapeutic avenues. A precise knowledge of the compounds with their mode of action could aid in developing new anti-TB agents that can kill latent and actively multiplying M.tb. This can help in the shortening of the anti-TB regimen and can improve the outcome of treatment strategies. Natural products have contributed several antibiotics for TB treatment. The sources of anti-TB drugs/inhibitors discussed in this work are target-based identification/cell-based and phenotypic screening from natural products. Some of the recently identified natural products derived leads have reached clinical stages of TB drug development, which include rifapentine, CPZEN-45, spectinamide-1599 and 1810. We believe these anti-TB agents could emerge as superior therapeutic compounds to treat TB over known Food and Drug Administration drugs.
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Affiliation(s)
- Gautam Kumar
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, Telangana, India
| | - Amrutha C
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, Telangana, India
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Desai R, Raval M, Adompreh-Fia KS, Nagarajan JS, Ghadge N, Vyas A, Jain A, Paul TK, Sachdeva R, Kumar G. Role of Intravascular Ultrasound in Pulmonary Embolism Patients Undergoing Mechanical Thrombectomy: A Systematic Review. Tomography 2023; 9:1393-1407. [PMID: 37489479 PMCID: PMC10366920 DOI: 10.3390/tomography9040111] [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: 06/14/2023] [Revised: 07/11/2023] [Accepted: 07/12/2023] [Indexed: 07/26/2023] Open
Abstract
BACKGROUND Traditionally, mechanical thrombectomy performed for pulmonary embolism (PE) necessitates the utilization of iodinated contrast. Intravascular ultrasound (IVUS) has been used as a diagnostic and therapeutic modality in the management of acute high and intermediate-risk PE. Recently, with the shortage of contrast supplies and the considerable incidence of contrast-induced acute kidney injury (CI-AKI), other safer and more feasible IVUS methods have become desirable. The purpose of this systematic review was to evaluate the importance of IVUS in patients with PE undergoing thrombectomy. METHODS Medline/PubMed, Embase, Scopus, and Google Scholar were searched for review studies, case reports, and case series. Clinical characteristics, outcomes and the usage of IVUS-guided mechanical thrombectomy during the treatment of acute high and intermediate-risk PE were examined in a descriptive analysis. RESULTS In this systematic review, we included one prospective study, two case series, and two case reports from July 2019 to May 2023. A total of 39 patients were evaluated; most were female (53.8%). The main presenting symptoms were dyspnea and chest pain (79.5%); three patients (7.9%) presented with syncope, one with shock and one with cardiac arrest. Biomarkers (troponin and BNP) were elevated in 94.6% of patients. Most patients (87.2%) had intermediate-risk PE, and 12.8% had high-risk PE. All patients presented with right-heart strain (RV/LV ratio ≥ 0.9, n = 39). Most patients (56.4%) had bilateral PE. Mechanical thrombectomy was performed using IVUS without contrast utilization in 39.4% of the patients. After the initial learning curve, contrast usage decreased gradually over time. There was a significant decrease in the composite mean arterial pressure immediately following IVUS-guided thrombectomy from 35.1 ± 7.2 to 25.2 ± 8.3 mmHg (p < 0.001). Post-procedure, there was no reported (0%) CI-AKI, no all-cause mortality, no major bleeding, or other adverse events. There was a significant improvement in symptoms and RV function at the mean follow-up. CONCLUSIONS New evidence suggests that IVUS-guided mechanical thrombectomy is safe, with visualization of the thrombus for optimal intervention, and reduces contrast exposure.
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Affiliation(s)
- Rupak Desai
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA 30033, USA
| | - Maharshi Raval
- Department of Internal Medicine, Landmark Medical Center, Woonsocket, RI 02895, USA
| | | | | | | | - Ankit Vyas
- Department of Internal Medicine, Baptist Hospitals of Southeast Texas, Beaumont, TX 77701, USA
| | - Akhil Jain
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Timir K Paul
- Division of Cardiology, Saint Thomas Heart Institute, University of Tennessee Health Sciences Center, Nashville, TN 37205, USA
| | - Rajesh Sachdeva
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA 30033, USA
| | - Gautam Kumar
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA 30033, USA
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA 30322, USA
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Schmalz J, Quinarez RV, Kothare MV, Kumar G. Controlling neocortical epileptic seizures using forced temporal spike-time stimulation: an in silico computational study. Front Comput Neurosci 2023; 17:1084080. [PMID: 37449082 PMCID: PMC10336226 DOI: 10.3389/fncom.2023.1084080] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 06/09/2023] [Indexed: 07/18/2023] Open
Abstract
Epileptic seizure is typically characterized by highly synchronized episodes of neural activity. Existing stimulation therapies focus purely on suppressing the pathologically synchronized neuronal firing patterns during the ictal (seizure) period. While these strategies are effective in suppressing seizures when they occur, they fail to prevent the re-emergence of seizures once the stimulation is turned off. Previously, we developed a novel neurostimulation motif, which we refer to as "Forced Temporal Spike-Time Stimulation" (FTSTS) that has shown remarkable promise in long-lasting desynchronization of excessively synchronized neuronal firing patterns by harnessing synaptic plasticity. In this paper, we build upon this prior work by optimizing the parameters of the FTSTS protocol in order to efficiently desynchronize the pathologically synchronous neuronal firing patterns that occur during epileptic seizures using a recently published computational model of neocortical-onset seizures. We show that the FTSTS protocol applied during the ictal period can modify the excitatory-to-inhibitory synaptic weight in order to effectively desynchronize the pathological neuronal firing patterns even after the ictal period. Our investigation opens the door to a possible new neurostimulation therapy for epilepsy.
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Affiliation(s)
- Joseph Schmalz
- Department of Chemical and Biological Engineering, University of Idaho, Moscow, ID, United States
| | - Rachel V. Quinarez
- Department of Aerospace Engineering, San José State University, San José, CA, United States
| | - Mayuresh V. Kothare
- Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA, United States
| | - Gautam Kumar
- Department of Chemical and Materials Engineering, San José State University, San José, CA, United States
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Kumar G, Bhattacharya D, Mistry P, Chatterjee I. In-Catalyzed Transfer Hydrogenation and Regioselective Hydrogen-Deuterium Addition to the Olefins. J Org Chem 2023. [PMID: 37158804 DOI: 10.1021/acs.joc.3c00272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A unique and valuable methodology is developed for the hydrogenation of aromatic as well as aliphatic 1,1-di- and trisubstituted alkenes. In the presence of catalytic InBr3, readily available 1,3-benzodioxole and residual H2O present in the reaction mixture are utilized as a hydrogen gas surrogate and proved to be a practical source of deuterium incorporation into the olefins on either side by varying the source of the starting deuterated 1,3-benzodioxole or D2O. Experimental studies show the transfer of hydride from 1,3-benzodioxole to the carbocationic intermediate generated from the protonation of alkenes by the H2O-InBr3 adduct remains the critical step.
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Affiliation(s)
- Gautam Kumar
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| | - Debkanta Bhattacharya
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| | - Parag Mistry
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| | - Indranil Chatterjee
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
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Kumar G, Rajula MP, Rao KS, Ravishankar PL, Albar DH, Bahammam MA, Alamoudi A, Alzahrani KJ, Alsharif KF, Halawani IF, Alzahrani FM, Alnfiai MM, Baeshen HA, Patil S. Antimicrobial Efficacy of Blended Essential Oil and Chlorhexidine against Periodontal Pathogen ( P.gingivalis)-An In Vitro Study. Niger J Clin Pract 2023; 26:625-629. [PMID: 37357480 DOI: 10.4103/njcp.njcp_787_22] [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] [Indexed: 06/27/2023]
Abstract
Background Essential oils (EOs) have a considerable amount of therapeutic and preventive effect in treating dental diseases due to their wider potential as antibacterial and anti-inflammatory agents. EOs like virgin coconut oil, eucalyptus oil, peppermint oil thyme oil, and clove oil, when used in combination, may further have enhanced antimicrobial effects. However, limited information exists on the synergistic effect of these oils when used in combination, especially on the primary periodontal pathogen Porphyromonas gingivalis. Aim The current study aims to compare the antimicrobial efficacy of commercially available EO on the periodontal pathogen, P. gingivalis, in comparison to chlorhexidine (CHX). Materials and Methods Antimicrobial efficacy of EO and CHX was assessed at various concentrations against the periodontal pathogen P. gingivalis, by evaluating the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). Results P. gingivalis was seen to be sensitive at a MIC of 100 μg/ml and 50 μg/ml concentration of the EO, which is regarded as the MIC of EO against P. gingivalis and CHX effectively inhibited microbial growth at 0.4 μg/ml. Conclusion A combination of EOs possesses a potent antibacterial activity against P. gingivalis, and the antibacterial efficacy increases with increasing concentration of EOs.
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Affiliation(s)
- G Kumar
- Department of Periodontology, SRM Kattankulathur Dental College and Hospital, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur 603203, Kancheepuram, Tamil Nadu, India
| | - M P Rajula
- Department of Periodontology, SRM Kattankulathur Dental College and Hospital, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur 603203, Kancheepuram, Tamil Nadu, India
| | - K S Rao
- Department of Periodontology, SRM Kattankulathur Dental College and Hospital, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur 603203, Kancheepuram, Tamil Nadu, India
| | - P L Ravishankar
- Department of Periodontology, SRM Kattankulathur Dental College and Hospital, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur 603203, Kancheepuram, Tamil Nadu, India
| | - D H Albar
- Department of Preventive Dentistry, College of Dentistry, Jazan University, Saudi Arabia
| | - M A Bahammam
- Department of Periodontology, Faculty of Dentistry, King Abdulaziz University. Jeddah; Executive Presidency of Academic Affairs, Saudi Commission for Health Specialties, Riyadh, Saudi Arabia
| | - A Alamoudi
- Department of Oral Biology, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - K J Alzahrani
- Department of Clinical Laboratories Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - K F Alsharif
- Department of Clinical Laboratories Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - I F Halawani
- Department of Clinical Laboratories Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - F M Alzahrani
- Department of Clinical Laboratories Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - M M Alnfiai
- Department of Information Technology, College of Computers and Information Technology, Taif University, Taif, Saudi Arabia
| | - H A Baeshen
- Department of Orthodontics, College of Dentistry, King Abdulziz University, Jeddah, Saudi Arabia
| | - S Patil
- College of Dental Medicine, Roseman University of Health Sciences, South Jordan, UTAH, USA
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Desai R, Singh S, Mellacheruvu SP, Mohammed AS, Soni R, Perera A, Makarla VA, Santhosh S, Siddiqui MA, Mohammed BK, Mohammed ZUR, Gandhi Z, Vyas A, Jain A, Sachdeva R, Kumar G. Recurrent/Subsequent Stroke and Associated Outcomes in Geriatric Patients with OSA and Prior Stroke Events: A Retrospective Study Using the 2019 National Inpatient Sample. J Pers Med 2023; 13:jpm13050782. [PMID: 37240952 DOI: 10.3390/jpm13050782] [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: 03/31/2023] [Revised: 04/22/2023] [Accepted: 04/28/2023] [Indexed: 05/28/2023] Open
Abstract
Background: Obstructive sleep apnea (OSA) increases the risk of stroke and cardiovascular diseases. However, its impact on geriatric patients with a prior history of stroke/transient ischemic attack (TIA) has not been adequately studied. Methods: We utilized the 2019 National Inpatient Sample in the US to identify geriatric patients with OSA (G-OSA) who had a prior history of stroke/TIA. We then compared subsequent stroke (SS) rates among sex and race subgroups. We also compared the demographics and comorbidities of SS+ and SS- groups and utilized logistic regression models to assess outcomes. Results: Out of 133,545 G-OSA patients admitted with a prior history of stroke/TIA, 4.9% (6520) had SS. Males had a higher prevalence of SS, while Asian-Pacific Islanders and Native Americans had the highest prevalence of SS, followed by Whites, Blacks, and Hispanics. The SS+ group had higher all-cause in-hospital mortality rates, with Hispanics showing the highest rate compared to Whites and Blacks (10.6% vs. 4.9% vs. 4.4%, p < 0.001), respectively. Adjusted analysis for covariates showed that complicated and uncomplicated hypertension (aOR 2.17 [95% CI 1.78-2.64]; 3.18 [95% CI 2.58-3.92]), diabetes with chronic complications (aOR 1.28 [95% CI 1.08-1.51]), hyperlipidemia (aOR 1.24 [95% CI 1.08-1.43]), and thyroid disorders (aOR 1.69 [95% CI 1.14-2.49]) were independent predictors of SS. The SS+ group had fewer routine discharges and higher healthcare costs. Conclusions: Our study shows that about 5% of G-OSA patients with a prior history of stroke/TIA are at risk of hospitalization due to SS, which is associated with higher mortality and healthcare utilization. Complicated and uncomplicated hypertension, diabetes with chronic complications, hyperlipidemia, thyroid disorders, and admission to rural hospitals predict subsequent stroke.
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Affiliation(s)
- Rupak Desai
- Division of Cardiology, Atlanta VA Medical Center, 1670 Clairmont Road, Decatur, GA 30033, USA
| | - Sandeep Singh
- Department of Internal Medicine, University Hospital of North Midlands NHS Foundation Trust, Stoke-on-Trent ST4 6QG, UK
| | | | | | - Roshni Soni
- Department of General Medicine, GMERS Medical College, Gotri, Vadodara 390021, India
| | - Ayodya Perera
- International Faculty of Medicine, Tbilisi State Medical University, Tbilisi 0186, Georgia
| | | | - Sarayu Santhosh
- Department of Internal Medicine, Adichunchanagiri Institute of Medical Sciences, Rajiv Gandhi University of Health Sciences, B.G. Nagara, Bengaluru 560041, India
| | - Muneeb Ali Siddiqui
- College of Osteopathic Medicine, William Carey University, Hattiesburg, MS 39401, USA
| | - Bilal Khan Mohammed
- Department of Clinical Research, Duke University Medical Center, Durham, NC 27710, USA
| | | | - Zainab Gandhi
- Department of Internal Medicine, Wyoming Valley Medical Center, Wilkes-Barre, PA 18711, USA
| | - Ankit Vyas
- Department of Internal Medicine, Baptist Hospitals Of Southeast Texas, Beaumont, TX 77701, USA
| | - Akhil Jain
- Department of Internal Medicine, Mercy Catholic Medical Center, Darby, PA 19153, USA
| | - Rajesh Sachdeva
- Division of Cardiology, Atlanta VA Medical Center, 1670 Clairmont Road, Decatur, GA 30033, USA
| | - Gautam Kumar
- Division of Cardiology, Atlanta VA Medical Center, 1670 Clairmont Road, Decatur, GA 30033, USA
- Division of Cardiology, Emory University School of Medicine, Atlanta VA Medical Center, Atlanta, GA 30322, USA
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Kumar G, Srivastava A, Singh VP. Graphene oxide-supported nickel(II) complex as a reusable nano catalyst for the synthesis of bis(indolyl)methanes. Dalton Trans 2023; 52:3431-3437. [PMID: 36825768 DOI: 10.1039/d2dt04176f] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
A novel catalytic system of a nickel(II) complex of (E)-N'-((2-amino-5-chlorophenyl)(phenyl)methylene)-2-hydroxy-benzohydrazide (APH) supported on graphene oxide (GO) has been prepared. Detailed characterization of the synthesized catalyst has been carried out using NMR, FTIR, HRMS, PXRD, Raman, SEM, TEM, EDX and XPS. Its catalytic efficiency has been explored for the synthesis of various bis(indolyl)methane derivatives. The optimized reaction conditions prove that the catalyst is highly efficient, performs under mild conditions and is required in a very small amount (2 wt%). A diversified library of bis(indolyl)methane derivatives containing various electron donating and withdrawing substituents has been developed in high to excellent yields. The catalyst is equally efficient towards heterocyclic aldehydes. Moreover, owing to the strong covalent interaction between the APH-Ni(II) complex and GO, the catalyst shows outstanding recyclability for six subsequent cycles without any significant loss in activity.
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Affiliation(s)
- Gautam Kumar
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India.
| | - Ananya Srivastava
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India.
| | - Vinod P Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India.
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Chen JW, Pal A, Chen BH, Kumar G, Chatterjee S, Peringeth K, Lin ZH, Huang MH. Shape-Tunable BaTiO 3 Crystals Presenting Facet-Dependent Optical and Piezoelectric Properties. Small 2023; 19:e2205920. [PMID: 36521932 DOI: 10.1002/smll.202205920] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/27/2022] [Indexed: 06/17/2023]
Abstract
BaTiO3 octahedra, edge-, and corner-truncated cubes, and cubes with four tunable sizes from 132 to 438 nm are synthesized by a solvothermal growth approach. Acetic acid treatment can cleanly remove BaCO3 impurity. Rietveld refinement of X-ray diffraction patterns and Raman spectra help to confirm the particles have a tetragonal crystal structure. The crystals also exhibit size- and facet-dependent bandgap shifts. BaTiO3 octahedra show larger piezoelectric, ferroelectric, and pyroelectric effects than truncated cubes and cubes. The measured dielectric constant differences should be associated with their various facet-dependent behaviors. Piezoelectric nanogenerators fabricated from BaTiO3 octahedra consistently show the best performance than those containing truncated cubes and cubes. In particular, a nanogenerator with 30 wt.%-incorporated octahedra displays an open-circuit voltage of 23 V and short-circuit current of 324 nA. The device performance is also highly stable. The maximum output power reaches 3.9 µW at 60 MΩ. The fabricated nanogenerator can provide sufficient electricity to power light-emitting diodes. This work further demonstrates that various physical properties of semiconductor crystals show surface dependence.
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Affiliation(s)
- Jing-Wei Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300044, Taiwan
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Arnab Pal
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
- International Intercollegiate PhD Program, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Bo-Hao Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300044, Taiwan
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
- National Synchrotron Radiation Research Center, Hsinchu, 300092, Taiwan
| | - Gautam Kumar
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300044, Taiwan
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Subhodeep Chatterjee
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Kiran Peringeth
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Zong-Hong Lin
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300044, Taiwan
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Michael H Huang
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300044, Taiwan
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 300044, Taiwan
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Kumar G, Kapoor S. Targeting mycobacterial membranes and membrane proteins: Progress and limitations. Bioorg Med Chem 2023; 81:117212. [PMID: 36804747 DOI: 10.1016/j.bmc.2023.117212] [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: 08/23/2022] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/13/2023]
Abstract
Among the various bacterial infections, tuberculosis continues to hold center stage. Its causative agent, Mycobacterium tuberculosis, possesses robust defense mechanisms against most front-line antibiotic drugs and host responses due to their complex cell membranes with unique lipid molecules. It is now well-established that bacteria change their membrane composition to optimize their environment to survive and elude drug action. Thus targeting membrane or membrane components is a promising avenue for exploiting the chemical space focussed on developing novel membrane-centric anti-bacterial small molecules. These approaches are more effective, non-toxic, and can attenuate resistance phenotype. We present the relevance of targeting the mycobacterial membrane as a practical therapeutic approach. The review highlights the direct and indirect targeting of membrane structure and function. Direct membrane targeting agents cause perturbation in the membrane potential and can cause leakage of the cytoplasmic contents. In contrast, indirect membrane targeting agents disrupt the function of membrane-associated proteins involved in cell wall biosynthesis or energy production. We discuss the chronological chemical improvements in various scaffolds targeting specific membrane-associated protein targets, their clinical evaluation, and up-to-date account of their ''mechanisms of action, potency, selectivity'' and limitations. The sources of anti-TB drugs/inhibitors discussed in this work have emerged from target-based identification, cell-based phenotypic screening, drug repurposing, and natural products. We believe this review will inspire the exploration of uncharted chemical space for informing the development of new scaffolds that can inhibit novel mycobacterial membrane targets.
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Affiliation(s)
- Gautam Kumar
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India; Departemnt of Natural Products, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad 500037, India.
| | - Shobhna Kapoor
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India; Graduate School of Integrated Sciences for Life, Hiroshima University, Hiroshima 739-8528, Japan.
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Srivastava A, Kumar G, Kumar P, Srikrishna S, Singh VP. Quinazoli-4-one ionic liquid as a fluorescent sensor for NH 3 detection: Interaction with ctDNA, theoretical investigation and live cell bioimaging. Int J Biol Macromol 2023; 235:123832. [PMID: 36842738 DOI: 10.1016/j.ijbiomac.2023.123832] [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: 01/06/2023] [Revised: 02/17/2023] [Accepted: 02/21/2023] [Indexed: 02/28/2023]
Abstract
A novel quinazoli-4-one based ionic liquid, 1-(3-aminopropyl)-3-methyl-4-oxo-3,4-dihydroquinazolin-1-ium bromide (QIL) for fluorometric determination of dissolved ammonia has been successfully synthesized and characterized by spectroscopic techniques such as 1H and 13C NMR, FTIR and HRMS spectrometry. In the proposed method, QIL is converted to a fluorescent derivative by the reaction with ammonia in aqueous medium. The excitation and emission wavelengths were 250 and 436 nm, respectively. Remarkably with the reaction time of >1 s, the binding constant and detection limit was found to be 6.43 × 108 M-1 and 0.73 × 10-8 M, respectively. QIL is found to be highly selective as no interference is observed from various cations, anions, organic molecules and amino acids. The sensing mechanism was further validated by the density functional theory studies. The fluorophore exhibited great sensing property in 3.0-14.0 pH range, hence, it can be employed in diverse matrices. In addition, the fluoro-sensor is highly reversible and reusable in the presence of ctDNA molecule. Moreover, a live-cell imaging study of QIL in Drosophila larval gut tissue has also been carried out to investigate the cell permeability of QIL and its efficiency for selective detection of NH3 in cellular micro environment. To show practical applicability of the fluoro-sensor, test strip kit has been constructed. A detailed comparison table has been shown to evaluate the efficiency of this method.
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Affiliation(s)
- Ananya Srivastava
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Gautam Kumar
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Prabhat Kumar
- Department of Bio Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - S Srikrishna
- Department of Bio Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Vinod P Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
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Sharma R, Suravarjhula L, Banerjee M, Kumar G, Kumar N. Chimeric Antigen Receptor T-cell Therapy in Cancer: A Critical Review. Curr Drug Res Rev 2023; 15:241-261. [PMID: 36825696 DOI: 10.2174/2589977515666230220092125] [Citation(s) in RCA: 2] [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: 08/05/2022] [Revised: 12/19/2022] [Accepted: 01/03/2023] [Indexed: 02/22/2023]
Abstract
Targeted cancer therapy acts on targeted molecules, is less toxic to normal cells, and acts more specifically on cancer cells. The two primary strategies for preventing malignancy growth are the blocking of T-cell repression signals or forwarding of T-cell to tumor target with both T and tumor-specific antibodies. The CAR comprises three domains, the extracellular antigen recognition domain and the intracellular T-cell signaling domain, which participate in activating T-cells. The two most common adverse effects of CAR T-cell treatment are cytokine release syndrome (CRS) and cell-associated neurotoxicity syndrome (CANS). The adaptability of intracellular signaling domains inside CARs allows the cell to counterbalance the downregulation of co-stimulatory molecules produced by tumor cells, either indirectly or directly. The major disadvantage of CAR-T cell therapy is off-target toxicity. Treatment with CARs expressing CD3, CD123, Lewis Y, CLL-1, CD44v6, FLT3, and folate receptors showed promising results in preclinical models of acute myeloid leukemia (AML). A recent study has revealed that B7-H3 CAR-T cells exhibit significant anticancer efficacy in a variety of solid tumor preclinical models, including PDAC, ovarian cancer, neuroblastoma, and various pediatric malignancies. The notion of SUPRA CAR, with its unique capacity to alter targets without the need to re-engineer, is a recent innovation in CAR. Given the importance of NK cells in tumor development and metastatic defence, NK cell-based immunotherapies, including adoptive transfer of NK cells, have garnered a lot of interest. With the advancement of improved cellular manufacturing methods, novel cellular engineering strategies, precision genome editing technologies, and combination therapy approaches, we firmly believe that CAR-T cells will soon become an off-the-shelf, cost-effective, and potentially curative therapy for oncogenesis.
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Affiliation(s)
- Ravikant Sharma
- Department of Biotechnology, National Institution of Pharmaceutical Education and Research, Hajipur, Vaishali-844102, Bihar, India
| | - Lalitha Suravarjhula
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal-576104, Karnataka, India
| | - Madhuparna Banerjee
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal-576104, Karnataka, India
| | - Gautam Kumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal-576104, Karnataka, India
| | - Nitesh Kumar
- Department of Pharmacology and Toxicology, National Institution of Pharmaceutical Education and Research, Hajipur, Vaishali-844102, Bihar, India
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Kumar G, Kiran Tudu A. Tackling multidrug-resistant Staphylococcus aureus by natural products and their analogues acting as NorA efflux pump inhibitors. Bioorg Med Chem 2023; 80:117187. [PMID: 36731248 DOI: 10.1016/j.bmc.2023.117187] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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: 10/21/2022] [Revised: 01/23/2023] [Accepted: 01/23/2023] [Indexed: 01/29/2023]
Abstract
Staphylococcus aureus (S. aureus) is a pathogen responsible for various community and hospital-acquired infections with life-threatening complications like bacteraemia, endocarditis, meningitis, liver abscess, and spinal cord epidural abscess. Antibiotics have been used to treat microbial infections since the introduction of penicillin in 1940. In recent decades, the abuse and misuse of antibiotics in humans, animals, plants, and fungi, including the treatment of non-microbial diseases, have led to the rapid emergence of multidrug-resistant pathogens with increased virulence. Bacteria have developed several complementary mechanisms to avoid the effects of antibiotics. These mechanisms include chemical transformations and enzymatic inactivation of antibiotics, modification of antibiotics' target site, and reduction of intracellular antibiotics concentration by changes in membrane permeability or by the overexpression of efflux pumps (EPs). The strategy to check antibiotic resistance includes synthesis of the antibiotic analogues, or antibiotics are given in combination with the adjuvant. The inhibitors of multidrug EPs are considered promising alternative therapeutic options with the potential to revive the effects of antibiotics and reduce bacterial virulence. Natural products played a vital role in drug discovery and significantly contributed to the area of infectious diseases. Also, natural products provide lead compounds that sometimes need modification based on structural and biological properties to meet the drug criteria. This review discusses natural products and their derived compounds as NorA efflux pump inhibitors (EPIs).
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Affiliation(s)
- Gautam Kumar
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, Balanagar, Telangana 500037, India.
| | - Asha Kiran Tudu
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, Balanagar, Telangana 500037, India
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Kumar G, Bakshi S, Sangaiah AK, Sa PK. Experimental Evaluation of Covariates Effects on Periocular Biometrics: A Robust Security Assessment Framework. J Data and Information Quality 2023. [DOI: 10.1145/3579029] [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: 01/31/2023]
Abstract
The growing integration of technology into our lives has resulted in unprecedented amounts of data that are being exchanged among devices in an Internet of Things (IoT) environment. Authentication, identification, and device heterogeneities are major security and privacy concerns in IoT. One of the most effective solutions to avoid unauthorized access to sensitive information is biometrics. Deep learning based biometric systems have been proven to outperform traditional image processing and machine learning techniques. However, the image quality covariates associated with blur, resolution, illumination, and noise predominantly affect recognition performance. Therefore, assessing the robustness of the developed solution is another important concern that still needs to be investigated. This paper proposes a periocular region based biometric system and explores the effect of image quality covariates (artifacts) on the performance of periocular recognition. To simulate the real-time scenarios and understand the consequences of blur, resolution, and bit-depth of images on the recognition accuracy of periocular biometrics, we modeled out-of-focus blur, camera shake blur, low-resolution, and low bit-depth image acquisition using Gaussian function, linear motion, interpolation, and bit plan slicing respectively. All the images of the UBIRIS.v1 database are degraded by varying strength of image quality covariates to obtain degraded versions of the database. Afterward, deep models are trained with each degraded version of the database. The performance of the model is evaluated by measuring statistical parameters calculated from a confusion matrix. Experimental results show that among all types of covariates, camera shake blur has less effect on the recognition performance, while out-of-focus blur significantly impacts it. Irrespective of image quality, the convolutional neural network produces excellent results, which proves the robustness of the developed model.
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Affiliation(s)
- Gautam Kumar
- National Institute of Technology Rourkela, India
| | | | - Arun Kumar Sangaiah
- International Graduate Institute of AI, National Yunlin University of Science and Technology, Taiwan
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Kumar G, Jaber W, Sachdeva R. Intravascular ultrasound guidance in percutaneous mechanical thrombectomy: A single-center experience from the FLASH registry. Cardiovasc Revasc Med 2023; 50:19-25. [PMID: 36697337 DOI: 10.1016/j.carrev.2023.01.011] [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: 11/24/2022] [Revised: 01/11/2023] [Accepted: 01/17/2023] [Indexed: 01/22/2023]
Abstract
BACKGROUND Traditionally, iodinated contrast is utilized during catheter-based mechanical thrombectomy for pulmonary embolism (PE). Recently, there have been disruptive contrast shortages. Furthermore, contrast can cause contrast-induced acute kidney injury especially in patients with pre-existing chronic kidney disease, necessitating an alternative imaging method. We present utilization and feasibility of an intravascular ultrasound (IVUS)-guided strategy for mechanical thrombectomy in PE from the FLASH registry. METHODS In this FLASH patient subset, IVUS was used to image the pulmonary arteries (PAs) before and after mechanical thrombectomy with the FlowTriever System at one study site comprising three hospitals. The Philips Visions PV 0.035" IVUS catheter was used for all the IVUS-guided cases in a standardized manner. RESULTS Between July 2019 and December 2021, 26 FLASH patients enrolled at this site underwent IVUS-guided thrombectomy. Most patients (96.2 %) had intermediate-risk PE and 3.8 % had high-risk PE. The mean baseline composite RV/LV ratio was 1.36 ± 0.27 and the mean simplified Pulmonary Embolism Severity Index (sPESI) score was 1.9 ± 1.2. A decreasing trend in contrast agent volume usage was observed over time and several later procedures were performed with IVUS guidance alone. Mean PA pressure significantly decreased immediately following thrombectomy from 34.8 ± 8.3 to 25.5 ± 7.3 mmHg (p < 0.0001). Systolic PA pressure also significantly decreased immediately from 55.4 ± 13.9 to 39.5 ± 12.5 mmHg (p < 0.0001). Significant improvements were seen in echocardiographic assessments of RV function at a mean 87-day follow-up compared with baseline. CONCLUSIONS In conclusion, the use of IVUS guidance with minimal or no angiographic contrast during mechanical thrombectomy for acute PE is technically feasible.
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Affiliation(s)
- Gautam Kumar
- Division of Cardiology, Emory University Hospital, Atlanta, GA, United States of America; Division of Cardiology, Atlanta VA Medical Center, Decatur, GA, United States of America
| | - Wissam Jaber
- Division of Cardiology, Emory University Hospital, Atlanta, GA, United States of America
| | - Rajesh Sachdeva
- Division of Cardiology, Atlanta VA Medical Center, Decatur, GA, United States of America.
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Quinarez RV, Kothare MV, Kumar G. Forced temporal spiking timing stimulation to control frequency-specific oscillations in epileptic seizures: A computational study. Brain Stimul 2023. [DOI: 10.1016/j.brs.2023.01.468] [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: 02/17/2023] Open
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Kumar N, Kamath S, Kumar G, Vaishali K, Sinha MK, Amin R, Chamallamudi MR. Prenatal Learning and Memory: Review on the Impact of Exposure. Curr Pediatr Rev 2023; 19:108-120. [PMID: 35652394 DOI: 10.2174/1573396318666220601160537] [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] [Received: 12/05/2021] [Revised: 03/28/2022] [Accepted: 04/21/2022] [Indexed: 02/08/2023]
Abstract
BACKGROUND Prenatal Learning is a topic still debated for its existence, although the concept is well known since ancient times. OBJECTIVE The present review highlights the impact of various stimuli on learning and memory in prenatal and postnatal life. METHODS For review, various articles from preclinical and clinical studies providing early pieces of evidence of prenatal learning to date were included based on the relevancy of the databases, namely, Scopus, Pubmed, and Google Scholar. RESULTS Learning is the process of acquiring skills/ preferences/ habits from the experiences of the exposures of the past. These exposures are the stimuli, which help in categorizing learning into associated or nonassociated learning. The stimuli of adults related to auditory, gustatory, olfactory, visual, touch, etc. are also accessible to the prenatal life in utero either directly or indirectly through the mother. The effects of these stimuli are remarkable during prenatal life and can be seen clearly in infants. These stimuli play an important role in prenatal learning and contribute to neuronal development. The present review summarizes the pieces of evidence for each of these types of learning & their impact on the ex utero life, a futuristic view & the scope of understanding prenatal learning. The review also elucidates the factors affecting prenatal learning. CONCLUSION Studies from clinical and preclinical studies reflected the impacts of several aspects of an infant's life and the memory created during prenatal life was found to be most likely carried on to postnatal life.
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Affiliation(s)
- Nitesh Kumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka- 576104, India.,Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Hajipur-844102, Bihar, India
| | - Sushmitha Kamath
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka- 576104, India
| | - Gautam Kumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka- 576104, India
| | - K Vaishali
- Department of Physiotherapy, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, Karnataka- 576104, India
| | - Mukesh Kumar Sinha
- Department of Physiotherapy, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, Karnataka- 576104, India
| | - Revati Amin
- Department of Physiotherapy, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, Karnataka- 576104, India
| | - Mallikarjuna Rao Chamallamudi
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka- 576104, India
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Rao V, Kumar G, Vibhavari RJA, Nandakumar K, Thorat ND, Chamallamudi MR, Kumar N. Temozolomide Resistance: A Multifarious Review on Mechanisms Beyond O-6-Methylguanine-DNA Methyltransferase. CNS Neurol Disord Drug Targets 2023; 22:817-831. [PMID: 35379142 DOI: 10.2174/1871527321666220404180944] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 02/16/2022] [Accepted: 02/21/2022] [Indexed: 05/19/2023]
Abstract
BACKGROUND Chemotherapy with the oral alkylating agent temozolomide still prevails as a linchpin in the therapeutic regimen of glioblastoma alongside radiotherapy. Because of the impoverished prognosis and sparse chemotherapeutic medicaments associated with glioblastoma, the burgeoning resistance to temozolomide has made the whole condition almost irremediable. OBJECTIVE The present review highlights the possible mechanisms of drug resistance following chemotherapy with temozolomide. METHODS The review summarizes the recent developments, as published in articles from Scopus, PubMed, and Web of Science search engines. DESCRIPTION One of the prime resistance mediators, O-6-methylguanine-DNA methyltransferase, upon activation, removes temozolomide-induced methyl adducts bound to DNA and reinstates genomic integrity. In the bargain, neoteric advances in the conception of temozolomide resistance have opened the door to explore several potential mediators like indirect DNA repair systems, efflux mechanisms, epigenetic modulation, microenvironmental influences, and autophagy-apoptosis processes that constantly lead to the failure of chemotherapy. CONCLUSION This review sheds light on recent discoveries, proposed theories, and clinical developments in the field of temozolomide resistance to summarize the complex and intriguing involvement of oncobiological pathways.
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Affiliation(s)
- Vanishree Rao
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Gautam Kumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - R J A Vibhavari
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Krishnadas Nandakumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Nanasaheb D Thorat
- Nuffield Department of Women's and Reproductive Health, John Radcliffe Hospital, Medical Sciences Division, University of Oxford, Oxford OX3 9DU, United Kingdom
| | - Mallikarjuna Rao Chamallamudi
- Nuffield Department of Women's and Reproductive Health, John Radcliffe Hospital, Medical Sciences Division, University of Oxford, Oxford OX3 9DU, United Kingdom
| | - Nitesh Kumar
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research, Hajipur 844102, Bihar, India
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Inci EK, Khandhar S, Toma C, Licitra G, Brown MJ, Herzig M, Matthai W, Palevsky H, Schwartz A, Wight JA, McDaniel M, Kumar G, Devireddy C, Baumgartner S, Bashline M, Jaber WA. Mechanical thrombectomy versus catheter directed thrombolysis in patients with pulmonary embolism: A multicenter experience. Catheter Cardiovasc Interv 2023; 101:140-146. [PMID: 36448401 DOI: 10.1002/ccd.30505] [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] [Received: 05/24/2022] [Revised: 11/05/2022] [Accepted: 11/19/2022] [Indexed: 12/02/2022]
Abstract
OBJECTIVES Compare in-hospital outcomes of patients treated with either mechanical thrombectomy (MT) or catheter directed lysis (CDL) in treatment of acute pulmonary embolism (PE). METHODS This is a multicenter, retrospective cohort study of patients undergoing MT or CDL for acute PE between 2014 and 2021. The primary outcome was the composite of in-hospital death, significant bleed, vascular complication, or need for mechanical support post-procedure. Secondary outcomes included the individual components of the composite outcome in addition to blood transfusions, invasive hemodynamics, echocardiographic data, and intensive care unit (ICU) utilization. RESULTS 458 patients were treated for PE with 266 patients in the CDL arm and 192 patients in the MT arm. The primary composite endpoint was not significantly different between the two groups with CDL 12% versus MT 11% (p = 0.5). There was a significant difference in total length of ICU time required with more in the CDL group versus MT (3.8 ± 2.0 vs. 2.8 ± 3.0 days, p = 0.009). All other secondary end points showed no significant difference between the groups. CONCLUSIONS In patients undergoing catheter directed treatment of PE, there was no difference between MT and CDL in terms of in-hospital mortality, bleeds, catheter-related complications, and hemodynamics.
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Affiliation(s)
- Errol K Inci
- Emory University Hospital, Atlanta, Georgia, USA
| | - Sameer Khandhar
- PENN Presbyterian Medical Center, Perelman School of Medicine at University of Pennsylvania, Philadelphia, Pennsyvlanvia, USA
| | - Catalin Toma
- Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | | | | | - Matthew Herzig
- PENN Presbyterian Medical Center, Perelman School of Medicine at University of Pennsylvania, Philadelphia, Pennsyvlanvia, USA
| | - William Matthai
- PENN Presbyterian Medical Center, Perelman School of Medicine at University of Pennsylvania, Philadelphia, Pennsyvlanvia, USA
| | - Harold Palevsky
- PENN Presbyterian Medical Center, Perelman School of Medicine at University of Pennsylvania, Philadelphia, Pennsyvlanvia, USA
| | | | - John A Wight
- Emory University Hospital, Atlanta, Georgia, USA
| | | | - Gautam Kumar
- Emory University Hospital, Atlanta, Georgia, USA
| | | | - Scott Baumgartner
- Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Michael Bashline
- Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
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Ravuluri JAV, Rao V, Kumar G, Manandhar S, Cheruku SP, Bisht P, Chamallmudi MR, Nandakumar K, Kumar L, Kumar N. Brain-targeted Nano-architectures for Efficient Drug Delivery and Sensitization in Glioblastoma. Curr Pharm Des 2023; 29:1775-1790. [PMID: 37403389 DOI: 10.2174/1381612829666230703113141] [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: 12/31/2022] [Revised: 05/16/2023] [Accepted: 05/29/2023] [Indexed: 07/06/2023]
Abstract
Due to ineffective diagnosis and analysis, glioblastoma multiforme (GBM), is still the most aggressive form of all cancers. Standard therapy for GBM comprises resection surgery following chemo and radiotherapy, which offers less efficacious treatment to the malignant nature of glioma. Several treatment strategies involving gene therapy, immunotherapy, and angiogenesis inhibition have been employed recently as alternative therapeutics. The main drawback of chemotherapy is resistance, which is mainly due to the enzymes involved in the therapeutic pathways. Our objective is to provide a clear insight into various nano-architectures used in the sensitization of GBM and their importance in drug delivery and bioavailability. This review includes the overview and summary of articles from Pubmed and Scopus search engines. The present era's synthetic and natural drugs used in the treatment of GBM are facing poor Blood Brain Barrier (BBB) permeability issues due to greater particle size. This problem can be resolved by using the nanostructures that showcase high specificity to cross the BBB with their nano-scale size and broader surface area. Nano-architectures act as promising tools for effective brain-targeted drug delivery at a concentration well below the final dose of free drug, thus resulting in safe therapeutic effects and reversal of chemoresistance. The present review focuses on the mechanisms involved in the resistance of glioma cells to chemotherapeutic agents, nano-pharmacokinetics, diverse types of nano-architectures used for potent delivery of the medicine and sensitization in GBM, their recent clinical advances, potential challenges, and future perspective.
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Affiliation(s)
| | - Vanishree Rao
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Gautam Kumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
- School of Pharmacy, Sharda University, Greater Noida, Uttar Pradesh 201310, India
| | - Suman Manandhar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Sri Pragnya Cheruku
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Priya Bisht
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Hajipur, Vaishali 844102, Bihar, India
| | - Mallikarjuna Rao Chamallmudi
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Krishnadas Nandakumar
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Lalit Kumar
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Hajipur, Vaishali 844102, Bihar, India
| | - Nitesh Kumar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Hajipur, Vaishali 844102, Bihar, India
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Naaz S, Ravindra P, Kumar G, Venugopal R, Ramajayam G, Sasidharan A, Kutty B. Age associated changes in sleep spindle characteristics in Vipasana meditator: A whole night polysomnography study. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.019] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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