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Mukhopadhyay M, Jalal M, Vignesh G, Ziauddin M, Sampath S, Bharat GK, Nizzetto L, Chakraborty P. Migration of Plasticizers from Polyethylene Terephthalate and Low-Density Polyethylene Casing into Bottled Water: A Case Study From India. Bull Environ Contam Toxicol 2022; 109:949-955. [PMID: 35230452 DOI: 10.1007/s00128-022-03474-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 07/28/2021] [Accepted: 02/01/2022] [Indexed: 06/14/2023]
Abstract
Mineral bottled water packed in three polymers viz., virgin polyethylene terephthalate (PET), recycled PET, and low-density polyethylene (LDPE) were investigated for the occurrence, migration, and health risk of phthalic acid esters (PAEs) at 25 °C, 35 °C, and 45 °C. The average concentration of six USEPA priority PAEs in refrigerated water samples was highest in recycled PET> LDPE > virgin PET. The highest leaching was seen at 45 °C after 2 days for LDPE water packets with ∑6PAEs amounting to 64,300 ng/L. Similarly, for recycled PET, the highest migration was seen at 45 °C after seven days (3,800 µg/L). Bis 2-ethyl hexyl phthalate (DEHP) and di-n-butyl phthalate (DnBP) were the predominant plasticizers from PET bottles and LDPE water packets, respectively. Predicted concentration after three weeks based on best fit obtained through the polynomial model for PET bottles was seen higher than the recommended limit suggested by USEPA (6 µg/L) and WHO (8 µg/L).
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Affiliation(s)
- Moitraiyee Mukhopadhyay
- Department of Civil Engineering, SRM Institute of Science and Technology, Kancheepuram district, 603203, Chennai, Tamil Nadu, India
| | - Mohammed Jalal
- Environmental Science and Technology Laboratory, Department of Chemical Engineering, SRM Institute of Science and Technology, Kancheepuram district, 603203, Chennai, Tamil Nadu, India
| | - G Vignesh
- Environmental Science and Technology Laboratory, Department of Chemical Engineering, SRM Institute of Science and Technology, Kancheepuram district, 603203, Chennai, Tamil Nadu, India
| | - Muhammed Ziauddin
- Environmental Science and Technology Laboratory, Department of Chemical Engineering, SRM Institute of Science and Technology, Kancheepuram district, 603203, Chennai, Tamil Nadu, India
| | - Srimurali Sampath
- Food Chemistry Division, ICMR-National Institute of Nutrition, Jamai Osmania, PO 500 007, Hyderabad, TS, India
| | | | - Luca Nizzetto
- Norwegian Institute for Water Research, Gaustadalléen 21, 0349, Oslo, Norway
- Research Centre for Toxic Compounds in the Environment (RECETOX), Kamenice 753/5, 625 00, Brno, Czech Republic
| | - Paromita Chakraborty
- Environmental Science and Technology Laboratory, Department of Chemical Engineering, SRM Institute of Science and Technology, Kancheepuram district, 603203, Chennai, Tamil Nadu, India.
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Jadhav S, Rajashekaraiah M, Chakraborty D, Bharath N, Sharieff SU, Vignesh G, Gandhamaneni K, Pasupuleti B, Thomas P, Balawardhana J. Retrospective analysis of 34 febrile neutropenia episodes - therapeutic implication of multiplex polymerase chain reaction in infection diagnosis. Indian J Cancer 2021; 58:501-510. [PMID: 34380857 DOI: 10.4103/ijc.ijc_835_18] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background Hemato-oncologic patients on chemotherapy or undergoing bone marrow transplantation are susceptible to infections due to neutropenia. Incidences of febrile neutropenia (FN) in these patients are common, contributing to high mortality and morbidity. Lack of diagnosis of pathogens responsible for infections in these patients is a major healthcare challenge. Newer molecular diagnostics are increasingly becoming relevant. The objective of this retrospective study was to evaluate the effectiveness of Syndrome Evaluation System (SES), a multiplex molecular diagnostic platform for diagnosis of pathogens, and its impact on the management of FN. Methods In total, 34 neutropenic episodes from 21 patients admitted during September 2013 to April 2015 were analyzed in this study. Clinical samples from patients were tested on SES and routine culture. Treatment was as per standard of care. Results SES showed a 5-fold higher clinical sensitivity (55.9%) as compared to automated culture (11.1%). SES results were available within 14 hours as compared to >72 hours for culture, and elucidated change in antimicrobial therapy in 50% of episodes. Mortality rates were lower when SES was used early in the episode. De-escalation of antimicrobials according to SES results was possible, which translated into substantial cost saving. Conclusion Newer non-culture-based molecular technologies like SES are changing the way we manage FN. It is faster, has a higher diagnostic yield as compared to traditional culture, and helps in making rapid, evidence-based therapeutic decision-making including de-escalation of antimicrobials. It would potentially lead to a reduction in mortality and healthcare cost in the long run.
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Affiliation(s)
- Sachin Jadhav
- Department of Hemato Oncology, BGS Global Gleneagles Hospital, Bengaluru, Karnataka, India
| | - Mahesh Rajashekaraiah
- Department of Hemato Oncology, BGS Global Gleneagles Hospital, Bengaluru, Karnataka, India
| | - Dipanjan Chakraborty
- Department of Clinical Research, XCyton Diagnostics Pvt. Ltd., Bengaluru, Karnataka, India
| | - N Bharath
- Department of Clinical Research, XCyton Diagnostics Pvt. Ltd., Bengaluru, Karnataka, India
| | - Safeer Ulla Sharieff
- Department of Pharmacy Practice, BGS Global Institute of Medical Sciences, Bengaluru, Karnataka, India
| | - G Vignesh
- Department of Pharmacy Practice, BGS Global Institute of Medical Sciences, Bengaluru, Karnataka, India
| | - Keerthi Gandhamaneni
- Department of Pharmacy Practice, BGS Global Institute of Medical Sciences, Bengaluru, Karnataka, India
| | - Bashwanth Pasupuleti
- Department of Pharmacy Practice, BGS Global Institute of Medical Sciences, Bengaluru, Karnataka, India
| | - Priya Thomas
- Department of Pharmacy Practice, BGS Global Institute of Medical Sciences, Bengaluru, Karnataka, India
| | - Jayantha Balawardhana
- Senior Consultant Oncologist and Radiotherapist, National Cancer Institute, Sri Lanka
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Vignesh G, Pradeep I, Arunachalam S, Vignesh S, Arthur James R, Arun R, Premkumar K. Biological and protein-binding studies of newly synthesized polymer-cobalt(III) complexes. LUMINESCENCE 2015; 31:533-543. [DOI: 10.1002/bio.2992] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 07/02/2015] [Accepted: 07/04/2015] [Indexed: 01/09/2023]
Affiliation(s)
- G. Vignesh
- School of Chemistry; Bharathidasan University; Tiruchirappalli- 620 024 Tamil Nadu India
| | - I. Pradeep
- School of Chemistry; Bharathidasan University; Tiruchirappalli- 620 024 Tamil Nadu India
| | - S. Arunachalam
- School of Chemistry; Bharathidasan University; Tiruchirappalli- 620 024 Tamil Nadu India
| | - S. Vignesh
- Department of Marine Science; Bharathidasan University; Tiruchirappalli- 620 024 Tamil Nadu India
| | - R. Arthur James
- Department of Marine Science; Bharathidasan University; Tiruchirappalli- 620 024 Tamil Nadu India
| | - R. Arun
- Department of Biomedical Science; Bharathidasan University; Tiruchirappalli- 620 024 Tamil Nadu India
| | - K. Premkumar
- Department of Biomedical Science; Bharathidasan University; Tiruchirappalli- 620 024 Tamil Nadu India
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Vignesh G, Sugumar K, Arunachalam S, Vignesh S, Arthur James R, Arun R, Premkumar K. Studies on the synthesis, characterization, human serum albumin binding and biological activity of single chain surfactant-cobalt(III) complexes. LUMINESCENCE 2015; 31:523-532. [PMID: 26250655 DOI: 10.1002/bio.2991] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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: 03/10/2015] [Revised: 07/02/2015] [Accepted: 07/04/2015] [Indexed: 11/10/2022]
Abstract
The interaction of surfactant-cobalt(III) complexes [Co(bpy)(dien)TA](ClO4)3 · 3H2O (1) and [Co(dien)(phen)TA](ClO4)3 · 4H2O (2), where bpy = 2,2'-bipyridine, dien = diethylenetriamine, phen = 1,10-phenanthroline and TA = tetradecylamine with human serum albumin (HSA) under physiological conditions was analyzed using steady state, synchronous, 3D fluorescence, UV/visabsorption and circular dichroism spectroscopic techniques. The results show that these complexes cause the fluorescence quenching of HSA through a static mechanism. The binding constant (Kb ) and number of binding-sites (n) were obtained at different temperatures. The corresponding thermodynamic parameters (∆G°, ∆H° and ∆S°) and Ea were also obtained. According to Förster's non-radiation energy transfer theory, the binding distance (r) between the complexes and HSA were calculated. The results of synchronous and 3D fluorescence spectroscopy indicate that the binding process has changed considerably the polarity around the fluorophores, along with changes in the conformation of the protein. The antimicrobial and anticancer activities of the complexes were tested and the results show that the complexes have good activities against pathogenic microorganisms and cancer cells.
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Affiliation(s)
- G Vignesh
- School of Chemistry, Bharathidasan University, Tiruchirappalli-, 620 024, Tamil Nadu, India
| | - K Sugumar
- School of Chemistry, Bharathidasan University, Tiruchirappalli-, 620 024, Tamil Nadu, India
| | - S Arunachalam
- School of Chemistry, Bharathidasan University, Tiruchirappalli-, 620 024, Tamil Nadu, India
| | - S Vignesh
- Department of Marine Science, Bharathidasan University, Tiruchirappalli-, 620 024, Tamil Nadu, India
| | - R Arthur James
- Department of Marine Science, Bharathidasan University, Tiruchirappalli-, 620 024, Tamil Nadu, India
| | - R Arun
- Department of Biomedical Science, Bharathidasan University, Tiruchirappalli-, 620 024, Tamil Nadu, India
| | - K Premkumar
- Department of Biomedical Science, Bharathidasan University, Tiruchirappalli-, 620 024, Tamil Nadu, India
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Kumar S, Mahesh DM, Vignesh G, Sagili H, Dhanapathi H, Hamide A. Congenital hypothyroidism presenting as menorrhagia in adulthood. J Assoc Physicians India 2013; 61:660-661. [PMID: 24772707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Although hypothyroidism is a common cause of menorrhagia, it is an uncommon presentation of congenital hypothyroidism. We report a case of congenital hypothyroidism presenting in adulthood with severe menorrhagia. Despite the late presentation, she had features to suggest hypothyroidism since birth.
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Vignesh G, Sugumar K, Arunachalam S, Vignesh S, Arthur James R. A comparative study on the binding of single and double chain surfactant-cobalt(III) complexes with bovine serum albumin. Spectrochim Acta A Mol Biomol Spectrosc 2013; 113:415-422. [PMID: 23747382 DOI: 10.1016/j.saa.2013.04.123] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [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: 11/20/2012] [Revised: 04/25/2013] [Accepted: 04/29/2013] [Indexed: 06/02/2023]
Abstract
The comparative binding effect of single and double aliphatic chain containing surfactant-cobalt(III) complexes cis-[Co(bpy)2(DA)2](ClO4)3·2H2O (1), cis-[Co(bpy)2(DA)Cl](ClO4)2·2H2O (2), cis-[Co(phen)2(CA)2](ClO4)3·2H2O (3), and cis-[Co(phen)2(CA)Cl](ClO4)2·2H2O (4) with bovine serum albumin (BSA) under physiological condition was analyzed by steady state, time resolved fluorescence, synchronous, three-dimensional fluorescence, UV-Visible absorption and circular dichroism spectroscopic techniques. The results show that these complexes cause the fluorescence quenching of BSA through a static mechanism. The binding constants (Kb) and the number of binding sites were calculated and binding constant values are found in the range of 10(4)-10(5) M(-1). The results indicate that compared to single chain complex, double chain surfactant-cobalt(III) complex interacts strongly with BSA. Also the sign of thermodynamic parameters (ΔG°, ΔH°, and ΔS°) indicate that all the complexes interact with BSA through hydrophobic force. The binding distance (r) between complexes and BSA was calculated using Förster non-radiation energy transfer theory and found to be less than 7 nm. The results of synchronous, three dimensional fluorescence and circular dichroism spectroscopic methods indicate that the double chain surfactant-cobalt(III) complexes changed the conformation of the protein considerably than the respective single chain surfactant-cobalt(III) complexes. Antimicrobial studies of the complexes showed good activities against pathogenic microorganisms.
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Affiliation(s)
- G Vignesh
- School of Chemistry, Bharathidasan University, Tiruchirapalli 620 024, Tamil Nadu, India
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Affiliation(s)
- G Vignesh
- Department of Endocrinology, Jawaharlal Institute of Post-graduate Medical Education and Research, Puducherry, India
| | - Karthik Balachandran
- Department of Endocrinology, Jawaharlal Institute of Post-graduate Medical Education and Research, Puducherry, India
| | - Sadishkumar Kamalanathan
- Department of Endocrinology, Jawaharlal Institute of Post-graduate Medical Education and Research, Puducherry, India
| | - Abdoul Hamide
- Department of Endocrinology, Jawaharlal Institute of Post-graduate Medical Education and Research, Puducherry, India
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Balachandran K, Vignesh G, Mahesh DM, Girish P, Kamalanathan CS, Sahoo JP, Hamide A. Reassessment of elicitation of myoedema in evaluation of overt hypothyroidism: A pilot study. Indian J Endocrinol Metab 2012; 16:S356-S357. [PMID: 23565427 PMCID: PMC3603075 DOI: 10.4103/2230-8210.104091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
INTRODUCTION There is a need to reassess the significance of myoedema in evaluation of overt hypothyroidism in the current day clinical practice. It is commonly checked for by flicking across the biceps belly expecting a transient mound at the points of tactile stimuli with mild pressure. AIM AND OBJECTIVE To assess elicitation of myoedema in overt hypothyroidism (defined arbitrarily as TSH >50 mIU/L in primary hypothyroidism and fT4 <0.6 ng/dl in secondary hypothyroidism). RESULTS The 28 primary overt hypothyroid (OH) patients were divided into three groups as mild, moderate, and severe depending on TSH levels as those with 50-100, 100-150, and >150 mIU/L. Myoedema was elicited in 8 of 13 in the severe OH group, in 2 of 7 in moderate OH group and in 1 of 8 in the mild OH group. In the group of secondary hypothyroidism, myoedema was elicitable in one of two patients. The odds ratio for presence of both myoedema and clinical features of myopathy in a group of overt hypothyroid patients with TSH >150 mIU/L as compared to <150 mIU/L was 17.5. Similarly, the odds ratio for the presence of only myoedema was 6.4 while the odds ratio for presence of only clinical features of myopathy was 3.67. While the odds ratios involving presence of myoedema neared statistical significance, that with the presence of clinical features of myopathy alone did not. CONCLUSION Examination for eliciting myoedema is useful when evaluating a case of overt hypothyroidism.
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Affiliation(s)
| | - G. Vignesh
- Department of Endocrinology, JIPMER, Puducherry, India
| | - D. M. Mahesh
- Department of Endocrinology, JIPMER, Puducherry, India
| | - P. Girish
- Department of Endocrinology, JIPMER, Puducherry, India
| | | | | | - Abdoul Hamide
- Department of Endocrinology, JIPMER, Puducherry, India
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Kamalanathan SC, Mahesh DM, Vignesh G, Halanaik D. Symptomatic primary hyperparathyroidism in Indians. Indian J Endocrinol Metab 2011; 15:229-230. [PMID: 21897907 PMCID: PMC3156550 DOI: 10.4103/2230-8210.83413] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
| | - D. M. Mahesh
- Department of Endocrinology, JIPMER, Puducherry, India
| | - G. Vignesh
- Department of Endocrinology, JIPMER, Puducherry, India
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Chitre TS, Panda S, Patil SM, Chothe AS, Vignesh G, Kathiravan MK. Novel 1,3,4-(thiadiazol-2-ylamino) methyl-5-(pyridin-4-yl)-1,3,4-oxadiazol-2-thiones: synthesis, docking and antimycobacterial testing. ACTA ACUST UNITED AC 2011. [DOI: 10.4236/abc.2011.12002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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