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Manoharan V, Sharma G, Devana SK, Sharma S, Avti P, Chandramouli S. A prospective case-control study on the evaluation of oxidative stress in renal stone formers. Urolithiasis 2024; 52:18. [PMID: 38165517 DOI: 10.1007/s00240-023-01514-7] [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: 09/14/2023] [Accepted: 11/26/2023] [Indexed: 01/03/2024]
Abstract
Association of increased oxidative stress (OS) with the pathophysiology of renal stone formation has not been explored greatly in the field of urolithiasis. In this prospective case-control study, we measured 24-h urinary 8-hydroxy-2'-deoxyguanosine (8-OHdG) levels in patients with urolithiasis and compared them with matched healthy controls. We also measured 24-h urinary uric acid, calcium, oxalate, and citrate levels in patients with renal stone disease and studied their relation with urinary 8-OHdG levels. Seventy-five cases of renal stone disease and 75 well-matched controls were included. Median 24-h urinary 8-OHdG levels were significantly higher in cases compared to controls (7.6 vs. 3.7 µg/g of creatinine; p < 0.000). Receiver-operating curve (ROC) analysis for 8-OHdG between cases and controls revealed an area under the curve of 0.90. At 8-OHdG (µg/g of creatinine) value of 5 or more, a sensitivity and a specificity of 84% each were obtained. A positive correlation between 8-OHdG (µg/g of creatinine) and 24-h urinary oxalate level was noted (r = 0.461, p = 0.000). No correlation between 8-OHdG (µg/g of creatinine) and other variables was noted. On multivariate linear regression analysis, we noted 24-h urinary oxalate levels to be an independent predictor of urinary 8-OHdG levels. OS is significantly higher in patients with renal stone diseases compared to healthy controls. Urinary oxalate levels were significantly correlated with urinary 8-OHdG levels.
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Affiliation(s)
- V Manoharan
- Department of Urology, PGIMER, Chandigarh, India
| | - G Sharma
- Department of Urology, PGIMER, Chandigarh, India
| | - S K Devana
- Department of Urology, PGIMER, Chandigarh, India.
| | - S Sharma
- Department of Biochemistry, PGIMER, Chandigarh, India
| | - P Avti
- Department of Biophysics, PGIMER, Chandigarh, India
| | - S Chandramouli
- Department of General Surgery, PGIMER, Chandigarh, India
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Huber A, Jose S, Kassam A, Weghorn KN, Powers-Fletcher M, Sharma D, Mukherjee A, Mathew A, Kulkarni N, Chandramouli S, Alder MN, Madan R. Olfactomedin-4 + neutrophils exacerbate intestinal epithelial damage and worsen host survival after Clostridioides difficile infection. bioRxiv 2023:2023.08.21.553751. [PMID: 37662327 PMCID: PMC10473617 DOI: 10.1101/2023.08.21.553751] [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: 09/05/2023]
Abstract
Neutrophils are key first responders to Clostridioides difficile infection (CDI). Excessive tissue and blood neutrophils are associated with worse histopathology and adverse outcomes, however their functional role during CDI remains poorly defined. Utilizing intestinal epithelial cell (IEC)-neutrophil co-cultures and a pre-clinical animal model of CDI, we show that neutrophils exacerbate C. difficile -induced IEC injury. We utilized cutting-edge single-cell transcriptomics to illuminate neutrophil subtypes and biological pathways that could exacerbate CDI-associated IEC damage. As such, we have established the first transcriptomics atlas of bone marrow (BM), blood, and colonic neutrophils after CDI. We found that CDI altered the developmental trajectory of BM and blood neutrophils towards populations that exhibit gene signatures associated with pro-inflammatory responses and neutrophil-mediated tissue damage. Similarly, the transcriptomic signature of colonic neutrophils was consistent with hyper-inflammatory and highly differentiated cells that had amplified expression of cytokine-mediated signaling and degranulation priming genes. One of the top 10 variable features in colonic neutrophils was the gene for neutrophil glycoprotein, Olfactomedin 4 (OLFM4). CDI enhanced OLFM4 mRNA and protein expression in neutrophils, and OLFM4 + cells aggregated to areas of severe IEC damage. Compared to uninfected controls, both humans and mice with CDI had higher concentrations of circulating OLFM4; and in mice, OLFM4 deficiency resulted in faster recovery and better survival after infection. Collectively, these studies provide novel insights into neutrophil-mediated pathology after CDI and highlight the pathogenic role of OLFM4 + neutrophils in regulating CDI-induced IEC damage. One Sentence Summary Utilizing single-cell transcriptomics, IEC-epithelial co-cultures, and pre-clinical models of CDI, we have identified a subset of neutrophils that are marked by OLFM4 expression as pathogenic determinants of IEC barrier damage after CDI.
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Singh A, Thirumurugesan R, Krishnakumar S, Rani R, Chandramouli S, Parameswaran P, Mythili R. Performance evaluation of plasma nitrided 316L stainless steel during long term high temperature sodium exposure. Nuclear Engineering and Technology 2022. [DOI: 10.1016/j.net.2022.12.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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aouadi S, Chandramouli S, Torfeh T, Hammoud R, Al-hammadi N. PO-1818 Non-invasive grading of cervix cancer using diffusion weighted imaging. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)08269-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sharma P, Krishnakumar S, Chandramouli S, Nashine B, Mani A. Performance evaluation of a low flow rate Annular Linear Induction Pump. ANN NUCL ENERGY 2019. [DOI: 10.1016/j.anucene.2019.04.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Patri S, Vijayashree R, Suresh Kumar S, Anup Kumar P, Sabih M, Chandramouli S, Narayana Rao P, Meikandamurthy C, Prakash V, Selvaraj P. Investigations on the availability of second shutdown system of Indian FBR. Nuclear Engineering and Design 2017. [DOI: 10.1016/j.nucengdes.2017.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Vinod V, Sathishkumar S, Mourya R, Chandramouli S, Padmakumar G, Nashine B, Selvaraj P. Performance evaluation of decay heat removal system of PFBR with partial availability of air side dampers. Nuclear Engineering and Design 2017. [DOI: 10.1016/j.nucengdes.2017.04.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Al-Hammadi N, Divakar S, Riyas M, Caparrotti P, Chandramouli S, McGarry M, Sheim S, Hammoud R, Petric P. EP-1174: Interobserver variation in CT vs. MRI based delineation of the lumpectomy cavity. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32424-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Sree Rama Murthy A, Kumar AA, Prabhu E, Clinsha P, Lakshmigandhan I, Chandramouli S, Mahendran K, Gnanasekar K, Jayaraman V, Nashine B, Rajan K, Gnanasekaran T. Performance of semiconducting oxide based hydrogen sensor for argon cover gas in engineering scale sodium facility. Nuclear Engineering and Design 2014. [DOI: 10.1016/j.nucengdes.2014.01.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Vinod V, Krishnakumar S, Punniyamoorthy R, Vijayakumar G, Chandramouli S, Padmakumar G, Nashine B, Rajan K. Experimental evaluation of safety grade decay heat removal in prototype fast breeder reactor. Nuclear Engineering and Design 2013. [DOI: 10.1016/j.nucengdes.2013.08.072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Padmakumar G, Vinod V, Pandey G, Krishnakumar S, Chandramouli S, Vijaykumar G, Rajendra Prasad R, Mourya R, Madankumar P, Shanmugasundaram M, Ramakrishnan V, Meikandamurthy C, Rajan K. SADHANA facility for simulation of natural convection in the SGDHR system of PFBR. Progress in Nuclear Energy 2013. [DOI: 10.1016/j.pnucene.2013.03.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kalyanasundaram P, Raj B, Hemanath M, Chandramouli S, Venkatraman B. Regeneration qualification of cold trap using modeling validated by radiography and image processing. Nuclear Engineering and Design 2013. [DOI: 10.1016/j.nucengdes.2012.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kishore S, Ashok Kumar A, Chandramouli S, Nashine B, Rajan K, Kalyanasundaram P, Chetal S. An experimental study on impingement wastage of Mod 9Cr 1Mo steel due to sodium water reaction. Nuclear Engineering and Design 2012. [DOI: 10.1016/j.nucengdes.2011.11.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Gallagher J, Chandramouli S, Nazareth D, Mohan K, Ledson M, Walshaw MJ, Greenwood J. P240 Pneumothorax management in cystic fibrosis patients. Thorax 2011. [DOI: 10.1136/thoraxjnl-2011-201054c.240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Vijayakumar G, Rajan K, Nashine B, Chandramouli S, Madhusoodanan K, Kalyanasundaram P. Performance evaluation of PFBR wire type sodium leak detectors. Nuclear Engineering and Design 2011. [DOI: 10.1016/j.nucengdes.2011.03.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Huq S, Kalidindi S, Sureshkumar S, Chandramouli S, Greenwood J, Walshaw M. 325 What role do the general practitioners (GP) have in the care of cystic fibrosis (CF) patients? J Cyst Fibros 2011. [DOI: 10.1016/s1569-1993(11)60338-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chandramouli S, Devine M, Shoo H, Duffy N. P253 Pulmonary infiltrates in HIV negative immunocompromised patients: outcome and predictive factors. Thorax 2010. [DOI: 10.1136/thx.2010.151076.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Chandramouli S, Huq S, Lagan J, Davies L. P119 COPD assessment test scores: short-term changes during recovery from COPD exacerbation. Thorax 2010. [DOI: 10.1136/thx.2010.150987.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Hemanath M, Meikandamurthy C, kumar AA, Chandramouli S, Rajan K, Rajan M, Vaidyanathan G, Padmakumar G, Kalyanasundaram P, Raj B. Theoretical and experimental performance analysis for cold trap design. Nuclear Engineering and Design 2010. [DOI: 10.1016/j.nucengdes.2010.06.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ghosal R, Lewis KE, Chandramouli S. Infectious mononucleosis complicated by acute hepatitis and myocarditis: a response to corticosteroids. Case Reports 2009; 2009:bcr10.2008.1083. [DOI: 10.1136/bcr.10.2008.1083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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