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Baruah P, Srivastava A, Mishra Y, Chaurasia N. Modulation in growth, oxidative stress, photosynthesis, and morphology reveals higher toxicity of alpha-cypermethrin than chlorpyrifos towards a non-target green alga at high doses. Environ Toxicol Pharmacol 2024; 106:104376. [PMID: 38278501 DOI: 10.1016/j.etap.2024.104376] [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: 07/04/2023] [Revised: 01/21/2024] [Accepted: 01/22/2024] [Indexed: 01/28/2024]
Abstract
Considering the frequent detection of pesticides in the aquatic environment, the ecotoxicological effects of Chlorpyrifos (CHP), an organophosphate, and alpha-cypermethrin (ACM), a pyrethroid, on freshwater microalgae were compared for the first time in this study. High concentrations of both CHP and ACM significantly suppressed the growth of test microalga Graesiella emersonii (p < 0.05). The 96-h EC50 of CHP and ACM were 54.42 mg L-1 and 29.40 mg L-1, respectively. Sub-inhibitory doses of both pesticides increased ROS formation in a concentration-dependent manner, which was accompanied by changes in antioxidant enzymes activities, lipid peroxidation, and variations in photosynthetic pigment concentration. Furthermore, both pesticides influenced photosystem II performance, oxygen-evolving complex efficiency and, intracellular ATP levels. Scanning electron microscopy analysis revealed that high concentrations of both CHP and ACM caused considerable morphological changes in the microalga. In comparison, CHP was more toxic than ACM at low concentrations, whereas ACM was more toxic at high concentrations.
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Affiliation(s)
- Prithu Baruah
- Environmental Biotechnology laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong 793022, Meghalaya, India
| | - Akanksha Srivastava
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Yogesh Mishra
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Neha Chaurasia
- Environmental Biotechnology laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong 793022, Meghalaya, India.
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Chaurasia N, Mishra P, Garg S, Malik G. Sleep Quality in Patients With Schizophrenia in a Tertiary Care Center in Northern India. Prim Care Companion CNS Disord 2023; 25:23m03564. [PMID: 38198703 DOI: 10.4088/pcc.23m03564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024] Open
Abstract
Objective: To assess the quality of sleep among patients with schizophrenia. Methods: A cross-sectional descriptive study was conducted with 100 outpatients with schizophrenia recruited from a tertiary care center in Northern India from July 2022 to December 2022. Eligible participants were required to complete a demographic form, the Pittsburgh Sleep Quality Index (PSQI), and the Insomnia Severity Index (ISI). The severity of psychosis was assessed with the Positive and Negative Syndrome Scale (PANSS). Results: The mean age of the participants was 38.87 years (SD = 10.564). The prevalence of poor sleep quality (PSQI ≥ 5) among the patients with schizophrenia was 78%, and the mean PSQI score was 11.2 (SD = 5.31). Most of the participants in whom the prevalence of poor sleep quality was marginally higher were female (51%). Of the 7 PSQI components, daytime dysfunction was more affected (49%) compared to the other 6 components. There was a positive correlation between PSQI and ISI scores (r = 0.805, P < .001). PSQI (U = 380, P < .001) and ISI scores (U = 517, P < .001) were significantly lower in schizophrenia patients taking benzodiazepines. The PANSS scores were not significantly correlated with PSQI or ISI scores. Conclusions: Most patients with schizophrenia suffered significantly from poor sleep quality. The results showed the deleterious impact of poor sleep on their daytime functioning, suggesting the need for comprehensive management of sleep problems in such patients. Prim Care Companion CNS Disord 2023;25(6):23m03564. Author affiliations are listed at the end of this article.
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Affiliation(s)
- Neha Chaurasia
- Department of Psychiatry, Shri Guru Ram Rai Institute of Medical and Health Sciences, Uttarakhand, India
- Corresponding Author: Neha Chaurasia, PGDRP, Department of Psychiatry, Shri Guru Ram Rai Institute of Medical and Health Sciences, 248001, Uttarakhand, India
| | - Preeti Mishra
- Department of Psychiatry, Shri Guru Ram Rai Institute of Medical and Health Sciences, Uttarakhand, India
| | - Shobit Garg
- Department of Psychiatry, Shri Guru Ram Rai Institute of Medical and Health Sciences, Uttarakhand, India
| | - Gunjan Malik
- Department of Psychiatry, Shri Guru Ram Rai Institute of Medical and Health Sciences, Uttarakhand, India
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Malik G, Mishra P, Chaurasia N, Garg S. Sexual dysfunction in bipolar depression: Gender differences. J Family Med Prim Care 2023; 12:3356-3361. [PMID: 38361839 PMCID: PMC10866285 DOI: 10.4103/jfmpc.jfmpc_957_23] [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: 06/10/2023] [Revised: 07/16/2023] [Accepted: 09/08/2023] [Indexed: 02/17/2024] Open
Abstract
Objective To find sexual dysfunction in acute-phase bipolar depression patients and subsequently characterize the gender-wise differences in sexual functioning. Materials and Methods A cross-sectional, descriptive, observational, purposeful, and hospital-based study was done with 45 patients (age range: 18-59 years) with moderate to severe acute phase bipolar depression (HAM-D scores >18). The domain-wise (Pleasure, Desire/Frequency Desire/Interest, Arousal/Excitement, and Orgasm/Completion) sexual functioning was assessed by the Change in Sexual Functioning Questionnaire (CSFQ-14) (≤41 for females, ≤47 for males as a cut-off for dysfunction). This study is registered in the CTRI (Clinical Trials Registry India, Number: CTRI-2021-07-035182). Results The prevalence of sexual dysfunction was 91% of bipolar disorder patients with more male participants (53.3%) compared to females (46.7%). The mean HAM-D score for the study sample was 27.93 ± 8.035. The female gender had more dysfunctional scores in desire/frequency (t = 2.229, P = 0.031), desire/interest (t = 2.448, P = 0.019), orgasm/completion (t = 2.974, P = 0.005), and overall total CSFQ (t = 2.946, P = 0.005). The odds of sexual dysfunction were significant given a one-unit increase in suicidal ideation in the index episode (adjusted OR = 1.222, 95% CI: 1.004-1.488, P = .049). Conclusion Acute-phase bipolar patients have very high sexual dysfunction rates. Females have both global and specific sexual response cycle deficits in comparison to acute phase bipolar depressed males. Future trials shall amuse neurobiology grounded, more individualistic sexual rehabilitation-based interventional paradigms, and longitudinal research models in acute phase bipolar depression.
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Affiliation(s)
- Gunjan Malik
- Department of Psychiatry, Shri Guru Ram Rai Institute of Medical and Health Sciences, Dehradun, Uttarakhand, India
| | - Preeti Mishra
- Department of Psychiatry, Shri Guru Ram Rai Institute of Medical and Health Sciences, Dehradun, Uttarakhand, India
| | - Neha Chaurasia
- Department of Psychiatry, Shri Guru Ram Rai Institute of Medical and Health Sciences, Dehradun, Uttarakhand, India
| | - Shobit Garg
- Department of Psychiatry, Shri Guru Ram Rai Institute of Medical and Health Sciences, Dehradun, Uttarakhand, India
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Chanu NK, Mandal MK, Srivastava A, Mishra Y, Chaurasia N. Proteomics Reveals Damaging Effect of Alpha-Cypermethrin Exposure in a Non-Target Freshwater Microalga Chlorella sp. NC-MKM. Curr Microbiol 2023; 80:144. [PMID: 36943524 DOI: 10.1007/s00284-023-03179-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Accepted: 01/02/2023] [Indexed: 03/23/2023]
Abstract
Alpha-cypermethrin, a pyrethroid pesticide, is frequently used on crops to prevent insect attacks. However, occasionally, due to drift, leaching, or with rainwater, it enters the aquatic environment and poses a serious threat to the growth of non-target aquatic organisms. In the current study, we were interested in investigating the damaging effect of alpha-cypermethrin on a local freshwater non-target green alga Chlorella sp. NC-MKM in terms of its protein levels. This was achieved by exposing Chlorella sp. NC-MKM to an EC50 concentration of alpha-cypermethrin for 1 day, followed by the two-dimensional (2-D) gel electrophoresis and MALDI-TOF MS. Fifty-three proteins, which had showed significant differential accumulation (> 1.5 fold, P < 0.05) after exposure to alpha-cypermethrin, were considered as differentially accumulated proteins (DAPs). These DAPs were further divided into several functional categories, and the expressions of each in control and treatment samples were compared. Comparison revealed that alpha-cypermethrin exposure affects the accumulation of proteins related with photosynthesis, stress response, carbohydrate metabolism, signal transduction and transporters, translation, transcription, cell division, lipid metabolism, amino acid and nucleotide biosynthesis, secondary metabolites production, and post-translational modification, and thus rendered the tested algal isolate sensitive toward this pesticide. The overall findings of this research thus offer a fundamental understanding of the possible mechanism of action of the insecticide alpha-cypermethrin on the microalga Chlorella sp. NC-MKM and also suggest potential biomarkers for the investigation of pesticide exposed microalgae.
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Affiliation(s)
- Ng Kunjarani Chanu
- Environmental Biotechnology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, 793022, Meghalaya, India
| | - Madan Kumar Mandal
- Environmental Biotechnology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, 793022, Meghalaya, India
| | - Akanksha Srivastava
- Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Yogesh Mishra
- Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Neha Chaurasia
- Environmental Biotechnology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, 793022, Meghalaya, India.
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Chanu NK, Mandal MK, Srivastava A, Chaurasia N. Proteomics analysis reveals several metabolic alterations in cyanobacterium Anabaena sp. NC-K1 in response to alpha-cypermethrin exposure. Environ Sci Pollut Res Int 2022; 29:19762-19777. [PMID: 34718975 DOI: 10.1007/s11356-021-16611-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
In the current study, the effect of the EC50 and LC90 concentrations of pyrethroid insecticide alpha-cypermethrin to cyanobacteria Anabaena sp. NC-K1 was investigated at different time exposures (1st day, 4th day and 7th day) with reference to growth, photosynthetic pigments, oxidative damage and antioxidant defence system. Superoxide dismutase (1.38-fold), peroxidase (5.04) and proline content (2.27-fold) were enhanced compared to the control. After performing 2D gel electrophoresis at 1st day EC50 exposure, where appropriate differences in the biochemical and physiological parameters were observed, 22 differentially accumulated proteins (20 upregulated and 2 downregulated) were selected for mass spectrometry. Out of 42 proteins identified, 20 upregulated protein spots were classified into twelve categories according to their metabolic functions. Proteins related to photosynthesis (phycobilisome rod-core linker polypeptide, rubisco), stress responses (Hsp70, Hsp40, catalase family peroxidase), translation (elongation factor Tu) and amino acid biosynthesis and metabolism (3-phosphoshikimate 1-carboxyvinyl transferase) were significantly upregulated. Additionally, proteins involved in transcription and DNA repair (Snf-2 histone linker phd ring helicase, RNA polymerase sigma factor RpoD and Holliday junction ATP-dependent DNA helicase RuvA) were considerably upregulated. Upregulation of these proteins against pesticide stress presumably maintained the photosynthesis, energy metabolism, carbohydrate metabolism, transport and signalling proteins, transcription, translation and DNA repair. Additionally, these proteins might involve in sufficient detoxification of ROS and play a crucial role in damage removal and repair of oxidized proteins, lipids and nucleic acids. Taken together, Anabaena sp. NC-K1 responded towards alpha-cypermethrin stress via modulating its proteome to maintain its cellular metabolism and homeostasis.
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Affiliation(s)
- Ng Kunjarani Chanu
- Environmental Biotechnology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, 793022, India
| | - Madan Kumar Mandal
- Environmental Biotechnology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, 793022, India
| | - Akanksha Srivastava
- Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Neha Chaurasia
- Environmental Biotechnology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, 793022, India.
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Chaurasia N, Singh IL, Singh T, Tiwari T, Singh A. Effect of depression on attentional network system among rheumatoid arthritis patients-A cross-sectional study. J Family Med Prim Care 2020; 9:1974-1980. [PMID: 32670950 PMCID: PMC7346935 DOI: 10.4103/jfmpc.jfmpc_1161_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 12/21/2019] [Accepted: 02/19/2020] [Indexed: 11/30/2022] Open
Abstract
Rheumatoid arthritis (RA) is a chronic, painful and debilitating musculoskeletal condition with depression being its common co-morbidity. It is associated with symptoms of fatigue, pain, and sleep disturbances that can overlap with or mimic symptoms of depression. It may occur with at least mild severity is up to 42% of RA patients. Basically, depression refers to a constellation of experience including not only mood but also physical, mental and behavioral experiences. The fact that rates of depression are higher in samples of patients with RA than in the normal population is well documented. The present study was conducted in order to examine the effect of depression on attentional functioning with diagnosed RA patients. Twenty RA patients out of which 10 patients with depression and 10 patients without depression participated in the study. The Beck Depression Inventory was administered for the assessment of depression and the attentional network task was used to measure the attentional performance of the RA patients. Results revealed that there was a significant difference in depressive symptoms among RA patients on accuracy and reaction time (P < 0.01) and orienting effect (P < 0.05). The findings would also imply intervention and rehabilitation of depression among RA patients.
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Affiliation(s)
- Neha Chaurasia
- Cognitive Science Laboratory, Department of Psychology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Indramani L Singh
- Cognitive Science Laboratory, Department of Psychology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Tara Singh
- Cognitive Science Laboratory, Department of Psychology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Trayambak Tiwari
- Cognitive Science Laboratory, Department of Psychology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Anup Singh
- Department of Geriatric Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
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Chaurasia N, Singh A, Singh IL, Singh T, Tiwari T. Cognitive dysfunction in patients of rheumatoid arthritis. J Family Med Prim Care 2020; 9:2219-2225. [PMID: 32754477 PMCID: PMC7380780 DOI: 10.4103/jfmpc.jfmpc_307_20] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 03/19/2020] [Accepted: 04/15/2020] [Indexed: 12/12/2022] Open
Abstract
Rheumatoid Arthritis (RA) is a form of arthritis characterized by joint pain, stiffness, swelling and deformity. There has been plethora of researches in the area of rheumatoid arthritis which focused on immune system, genetic predisposition and newer treatment modalities. Researchers have also examined the cognitive decline, physical deficits and their interrelationship in patients with RA. Among several psychological aspects depression, anxiety and stress emerge as significant psychological co morbidity. RA is a multifactorial, chronic, inflammatory disease primarily affects physical functioning as well as psychological aspects. Pain, fatigue, duration of disease, disease activity and functional disability are very common in rheumatoid arthritis which is leading cause of psychological distress and functional disability. Various types of neuropsychological battery were used to assess the decline in specific areas like attention, executive functioning, visuo-spatial learning, verbal learning/memory etc. These functions were compared with other type of arthritis disease. Also, various other factors like depression, cardiovascular diseases, other systemic and chronic disease and concomitant drugs intake etc. also affected cognitive functioning in Rheumatoid Arthritis patients. The objective of this review was to identify and explore the rates and types of cognitive impairment in RA. This present review paper systematically examines and summarizes the cognition related decrement in arthritis patients. Multiple research articles between 1990 to 2018 were searched. These reviews were evaluated and synthesized using a narrative and descriptive approach.
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Affiliation(s)
- Neha Chaurasia
- Cognitive Science Laboratory, Department of Psychology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Anup Singh
- Department of Geriatric Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Indramani L Singh
- Cognitive Science Laboratory, Department of Psychology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Tara Singh
- Cognitive Science Laboratory, Department of Psychology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Trayambak Tiwari
- Cognitive Science Laboratory, Department of Psychology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
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Baruah P, Chaurasia N. Ecotoxicological effects of alpha-cypermethrin on freshwater alga Chlorella sp.: Growth inhibition and oxidative stress studies. Environ Toxicol Pharmacol 2020; 76:103347. [PMID: 32058321 DOI: 10.1016/j.etap.2020.103347] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [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: 03/15/2019] [Revised: 10/15/2019] [Accepted: 01/29/2020] [Indexed: 06/10/2023]
Abstract
Alpha-cypermethrin (ACy) is a synthetic pyrethroid insecticide commonly used in agricultural practices for controlling a broad range of insect pests particularly belonging to the order Lepidoptera and Coleoptera. The present study aims to evaluate the toxic effect of ACy on microalgae by studying its influence on Chlorella sp. According to our knowledge, this is the first detailed study of ACy toxicity on microalgae. Significant growth inhibition of Chlorella sp. was observed at high ACy concentration (6-48 mg L-1) during the entire 96 h bioassay. The 96 h median effective concentration (EC50) of ACy was estimated to be 11.00 mg L-1. Flow cytometry analysis showed an enhanced generation of reactive oxygen species (ROS) and intracellular lipid accumulation after 96 h exposure to 11.00 mg L-1 of ACy. Further, the same ACy concentration showed a significant decrease in photosynthetic pigment content and an increase in antioxidant enzyme activity and malondialdehyde (MDA) content in Chlorella sp.
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Affiliation(s)
- Prithu Baruah
- Environmental Biotechnology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, 793022, India
| | - Neha Chaurasia
- Environmental Biotechnology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, 793022, India.
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Yadav S, Srivastava A, Biswas S, Chaurasia N, Singh SK, Kumar S, Srivastava V, Mishra Y. Comparison and optimization of protein extraction and two-dimensional gel electrophoresis protocols for liverworts. BMC Res Notes 2020; 13:60. [PMID: 32028996 PMCID: PMC7006083 DOI: 10.1186/s13104-020-4929-1] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 01/28/2020] [Indexed: 12/25/2022] Open
Abstract
Objective Liverworts possess historical adaptive strategies for abiotic stresses because they were the first plants that shifted from water to land. Proteomics is a state-of-the-art technique that can capture snapshots of events occurring at the protein level in many organisms. Herein, we highlight the comparison and optimization of an effective protein extraction and precipitation protocol for two-dimensional gel electrophoresis (2-DE) of liverworts. Results We compared three different protein extraction methods, i.e.,1.5 M Tris–HCl (pH 8.8), 50 mM Tris–HCl (pH 7.5), and polyvinylpolypyrrolidone (PVPP) extraction, followed by three precipitation methods, i.e., 80% ethanol, 80% acetone, and 20% tricholoroacetic acid (TCA)–acetone, in a liverwort Dumortiera hirsuta. Among these methods, 50 mM Tris–HCl (pH 7.5) extraction, followed by 20% TCA–acetone precipitation, appeared to be more suitable for 2-DE. Furthermore, we performed modifications during protein washing, re-solubilization in rehydration buffer and isoelectric focusing (IEF). The modifications provided us better results in terms of protein yield, resolution, spot numbers, and intensities for 2-DE gels of D. hirsuta and other two liverworts, i.e., Marchantia paleacea and Plagiochasma appendiculatum. Furthermore, we randomly selected spots from the 2-DE gel of D. hirsuta and identified using mass spectrometry, which confirms the applicability of this protocol for liverworts proteomics.
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Affiliation(s)
- Sandhya Yadav
- Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Akanksha Srivastava
- Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Subhankar Biswas
- Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Neha Chaurasia
- Department of Biotechnology and Bioinformatics, North Eastern Hill University, Shillong, 793022, India
| | - Sushil Kumar Singh
- Botanical Survey of India Northern Regional Centre, 192, Kaulagarh Road, Dehradun, Uttarakhand, 248003, India
| | - Sanjiv Kumar
- Division of Glycoscience, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, Royal Institute of Technology (KTH), AlbaNova University Centre, 10691, Stockholm, Sweden
| | - Vaibhav Srivastava
- Division of Glycoscience, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, Royal Institute of Technology (KTH), AlbaNova University Centre, 10691, Stockholm, Sweden.
| | - Yogesh Mishra
- Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
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Mandal MK, Chanu NK, Chaurasia N. Exogenous addition of indole acetic acid and kinetin under nitrogen-limited medium enhances lipid yield and expression of glycerol-3-phosphate acyltransferase & diacylglycerol acyltransferase genes in indigenous microalgae: A potential approach for biodiesel production. Bioresour Technol 2020; 297:122439. [PMID: 31810740 DOI: 10.1016/j.biortech.2019.122439] [Citation(s) in RCA: 16] [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] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 11/12/2019] [Accepted: 11/13/2019] [Indexed: 06/10/2023]
Abstract
In the present study, a combination of phytohormones (indole acetic acid and kinetin) was augmented in nitrogen-limited medium to achieve higher biomass and lipid yield in Graesiella emersonii NC-M1 and Chlorophyta sp. NC-M5. This condition was recorded with a 2.3- and 2.5-fold increase in biomass and lipid yield for Graesiella emersonii NC-M1 compared to the nitrogen-limited condition. Also, this condition showed a 1.6- and 1.08-fold increase in lipid yield and neutral lipid compared to the standard condition. Phytohormones addition also reduced oxidative damage caused by nitrogen-limitation and enhanced monounsaturated fatty acid content. Further, a 5.2- and 3.17-fold enhance in expression level of GPAT and DGAT genes were noticed under nitrogen-limited medium supplemented with phytohormones compared to control.
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Affiliation(s)
- Madan Kumar Mandal
- Environmental Biotechnology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong 793022, India
| | - Ng Kunjarani Chanu
- Environmental Biotechnology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong 793022, India
| | - Neha Chaurasia
- Environmental Biotechnology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong 793022, India.
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Poudel P, Upadhyaya C, Humagain M, Srii R, Chaurasia N, Dulal S. Clinicopathological Analysis of Oral Lesions - A hospital based retrospective study. Kathmandu Univ Med J (KUMJ) 2019; 17:311-315. [PMID: 33311041] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Background Proper diagnosis plays a key role that determines treatment and prognosis of the disease. To give appropriate clinical diagnosis, clinicians must be well aware of the presentation and demographic information of the lesion including the rare ones. Histopathology is still considered as gold standard in diagnostic pathology but final diagnosis becomes difficult unless detailed clinical and radiological descriptions are given. Hence an interdisciplinary approach is needed which requires correlation between both clinical and pathological details. Objective To analyze the clinicopathological details of all the oral lesions diagnosed in Dhulikhel hospital within the period of two years and to assess the concordance between clinical and histopathological diagnosis of these lesions. Method Laboratory record file of all the oral lesions diagnosed between January 2016 to December 2017 were retrieved from the department archives and the data were collected. The extracted data were analyzed using SPSS version 23.0. Result A total of 237 cases were analysed in the present study. Odontogenic cysts were the most common category followed by benign lesions. However considering the individual lesion, mucocele was the commonest lesion followed by squamous cell carcinoma. Total concordance between clinical and histopathologic diagnosis was found in 56.5% cases. The most clinicopathological agreement was seen for benign lesions followed by malignant lesions. Conclusion Mucocele and oral squamous cell carcinoma are the two most common lesions found among the patients visiting our hospital. The cases of oral squamous cell carcinoma are on a rise with each subsequent year. At present, though it is the second most common entity, it can be hypothesized that it may be higher up on the list. Therefore, oral healthcare awareness is paramount and this may be one of the best ways to reduce the oral cancer incidence rates and lowering the healthcare management burden.
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Affiliation(s)
- P Poudel
- Department of Oral Pathology, Kathmandu University School of Medical Sciences, Dhulikhel, Nepal
| | - C Upadhyaya
- Oral and Maxillofacial Surgery, Kathmandu University School of Medical Sciences, Dhulikhel, Nepal
| | - M Humagain
- Periodontology and Oral Implantology, Kathmandu University School of Medical Sciences, Dhulikhel, Nepal
| | - R Srii
- Department of Oral Pathology, Kathmandu University School of Medical Sciences, Dhulikhel, Nepal
| | - N Chaurasia
- Oral and Maxillofacial Surgery, Kathmandu University School of Medical Sciences, Dhulikhel, Nepal
| | - S Dulal
- Oral and Maxillofacial Surgery, Kathmandu University School of Medical Sciences, Dhulikhel, Nepal
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Mandal MK, Saikia P, Chanu NK, Chaurasia N. Modulation of lipid content and lipid profile by supplementation of iron, zinc, and molybdenum in indigenous microalgae. Environ Sci Pollut Res Int 2019; 26:20815-20828. [PMID: 31111387 DOI: 10.1007/s11356-019-05065-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 10/23/2018] [Accepted: 04/02/2019] [Indexed: 05/06/2023]
Abstract
The effects of iron (Fe), zinc (Zn), and molybdenum (Mo) on the biomass yield, lipid content, lipid yield, and fatty acid composition of Chlorella sp. NC-MKM, Graesiella emersonii NC-M1, Scenedesmus acutus NC-M2, and Chlorophyta sp. NC-M5 were studied. Among them, G. emersonii NC-M1 recorded the highest percentage increase in lipid content (140.3%) and neutral lipid (50.9%) under Zn-supplemented condition compared to the control. Also, it showed a 105% and 41.88% increase in lipid yield and neutral lipid under Fe-supplemented condition compared to the control. However, Chlorella sp. NC-MKM recorded an elevation in lipid yield (70.3% rise) and neutral lipid (24.32% rise) compared to the control in Mo-supplemented condition. The enhanced production of reactive oxygen species (ROS) and antioxidant enzyme (SOD and POD) under Fe-, Zn-, and Mo-supplemented condition supports the lipid accumulation. FAME analysis showed that the overall percentage of SFA and MUFA increased after the addition of Fe, Zn, and Mo in a culture medium compared to the control which is vital for a good-quality biodiesel. Further, biodiesel properties derived from FAMEs such as CN, SV, IV, CFPP, OS, υ, ρ, and HHV were found in accordance with biodiesel standard.
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Affiliation(s)
- Madan Kumar Mandal
- Environmental Biotechnology laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, 793022, India
| | - Papori Saikia
- Environmental Biotechnology laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, 793022, India
| | - Ng Kunjarani Chanu
- Environmental Biotechnology laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, 793022, India
| | - Neha Chaurasia
- Environmental Biotechnology laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, 793022, India.
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Singh AK, Chaurasia N, Rahmani S, Srivastava J, Singh AK. Ruthenate Ion Catalysed Oxidation of D-galactose and D-xylose by Alkaline Solution of Sodium Metaperiodate: A Kinetic Study. Journal of Chemical Research 2019. [DOI: 10.3184/0308234054323922] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The kinetics of ruthenate ion (RuO42–)-catalysed oxidation of D-galactose (Gal) and D-xylose (Xyl) by alkaline species of periodate, H2IO63–, in an aqueous solution at constant ionic strength shows zero order dependence on reducing sugar and first order dependence on RuO42–. First-order dependence of the reaction on periodate and OH- at their low concentrations tends to zero order in their higher concentration range. A slight increase in the rate of reaction with increase in ionic strength of the medium has also been observed. Various activation parameters have been computed. Lyxonic acid and threonic acid, along with formic acid, were identified as the main oxidation products for Gal and Xyl, respectively. A general mechanism involving bidentate interaction of a species of IO4– with a reactive species of sugar has been proposed.
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Affiliation(s)
- Ashok Kumar Singh
- Department of Chemistry, University of Allahabad, Allahabad-211002, India
| | - N. Chaurasia
- Department of Chemistry, University of Allahabad, Allahabad-211002, India
| | - Shahla Rahmani
- Department of Chemistry, University of Allahabad, Allahabad-211002, India
| | - Jaya Srivastava
- Department of Chemistry, University of Allahabad, Allahabad-211002, India
| | - Ajaya Kumar Singh
- Department of Chemistry, University of Allahabad, Allahabad-211002, India
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Upadhyaya C, Paunju N, Chaurasia N, Srii R. A Large Dermoid Cyst in the Floor of the Mouth. Kathmandu Univ Med J (KUMJ) 2018; 16:348-350. [PMID: 31729352] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The dermoid cyst in the floor of mouth is considered to bea rare condition which comprises only 1.6 to 6.5% of all body dermoid cysts. Dermoid cyst in the floor of mouth may be congenital or acquired. The congenital form results from defective embryonic development and the acquired form may be due to traumatic or iatrogenic causes; and as a result of the occlusion of a sebaceous gland duct. We report an unusual case of huge dermoid cyst in the floor of the mouth in a 12 year old male who presented with progressively increasing swelling below his tongue and reviewed the relevant literature.
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Affiliation(s)
- C Upadhyaya
- Department of Oral and Maxillofacial Surgery, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre
| | - N Paunju
- Department of Oral and Maxillofacial Surgery, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre
| | - N Chaurasia
- Department of Oral and Maxillofacial Surgery, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre
| | - R Srii
- Department of Oral Histology and Pathology, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre
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Mishra Y, Hall M, Locmelis R, Nam K, Söderberg CAG, Storm P, Chaurasia N, Rai LC, Jansson S, Schröder WP, Sauer UH. Active-site plasticity revealed in the asymmetric dimer of AnPrx6 the 1-Cys peroxiredoxin and molecular chaperone from Anabaena sp. PCC 7210. Sci Rep 2017; 7:17151. [PMID: 29215017 PMCID: PMC5719442 DOI: 10.1038/s41598-017-17044-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 11/16/2017] [Indexed: 12/31/2022] Open
Abstract
Peroxiredoxins (Prxs) are vital regulators of intracellular reactive oxygen species levels in all living organisms. Their activity depends on one or two catalytically active cysteine residues, the peroxidatic Cys (CP) and, if present, the resolving Cys (CR). A detailed catalytic cycle has been derived for typical 2-Cys Prxs, however, little is known about the catalytic cycle of 1-Cys Prxs. We have characterized Prx6 from the cyanobacterium Anabaena sp. strain PCC7120 (AnPrx6) and found that in addition to the expected peroxidase activity, AnPrx6 can act as a molecular chaperone in its dimeric state, contrary to other Prxs. The AnPrx6 crystal structure at 2.3 Å resolution reveals different active site conformations in each monomer of the asymmetric obligate homo-dimer. Molecular dynamic simulations support the observed structural plasticity. A FSH motif, conserved in 1-Cys Prxs, precedes the active site PxxxTxxCp signature and might contribute to the 1-Cys Prx reaction cycle.
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Affiliation(s)
- Yogesh Mishra
- Department of Chemistry, Umeå University, SE-901 87, Umeå, Sweden.,Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, SE-901 87, Umeå, Sweden.,Department of Botany, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Michael Hall
- Department of Chemistry, Umeå University, SE-901 87, Umeå, Sweden
| | - Roland Locmelis
- Department of Chemistry, Umeå University, SE-901 87, Umeå, Sweden
| | - Kwangho Nam
- Department of Chemistry, Umeå University, SE-901 87, Umeå, Sweden.,Computational Life-Science Cluster, CLiC, Umeå University, SE-901 87, Umeå, Sweden.,Department of Chemistry and Biochemistry University of Texas at Arlington, Arlington, TX, 76019-0065, USA
| | | | - Patrik Storm
- Department of Chemistry, Umeå University, SE-901 87, Umeå, Sweden
| | - Neha Chaurasia
- Department of Biotechnology and Bioinformatics, North Eastern Hill University, Shillong, 793022, India
| | - Lal Chand Rai
- Molecular Biology Section, Laboratory of Algal Biology, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Stefan Jansson
- Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, SE-901 87, Umeå, Sweden
| | - Wolfgang P Schröder
- Department of Chemistry, Umeå University, SE-901 87, Umeå, Sweden.,Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, SE-901 87, Umeå, Sweden
| | - Uwe H Sauer
- Department of Chemistry, Umeå University, SE-901 87, Umeå, Sweden. .,Computational Life-Science Cluster, CLiC, Umeå University, SE-901 87, Umeå, Sweden.
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Chaurasia N, Mishra Y, Chatterjee A, Rai R, Yadav S, Rai LC. Overexpression of phytochelatin synthase (pcs) enhances abiotic stress tolerance by altering the proteome of transformed Anabaena sp. PCC 7120. Protoplasma 2017; 254:1715-1724. [PMID: 28000119 DOI: 10.1007/s00709-016-1059-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 08/06/2016] [Accepted: 12/02/2016] [Indexed: 06/06/2023]
Abstract
The present study provides data on the insertion of an extra copy of phytochelatin synthase (alr0975) in Anabaena sp. PCC 7120. The recombinant strain (AnFPN-pcs) compared to wild type showed approximately 22.3% increase in growth rate under UV-B, NaCl, heat, CuCl2, carbofuran, and CdCl2. It also registered 2.25-fold enhanced nitrogenase activity and 5-fold higher phytochelatin production. A comparison of the protein profile of wild type with the recombinant strain revealed that recombinant strain accumulated proteins belonging to the following categories: (i) detoxification (nutrient stress induced DNA binding protein, Mn-SOD, Alr0946 (CalA)), (ii) protein folding and modification (molecular chaperone DnaK, FKBP-type peptidyl-prolyl cis-trans isomerase), (iii) nucleotide and amino acid biosynthesis (dihydroorotase and Ketol-acid reductoisomerase), (iv) photosynthesis and respiration (coproporphyrinogen III oxidase, phycocyanin alpha chain, ferredoxin-NADP+ reductase), and (v) transport (sugar transport ATP-binding protein). Thus, it can be concluded that, above category proteins with their respective role in scavenging reactive oxygen species, proper folding of unfolded proteins, and protection of protein from degradation, sustained carbon fixation and energy pool and active transport of sugar together conceivably help the recombinant cyanobacterium (AnFPN-pcs) to cope with abiotic stress employed in the present study. Such recombinant strains have potential for future use as biofertilizer.
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Affiliation(s)
- Neha Chaurasia
- Molecular Biology Section, Laboratory of Algal Biology, Center of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
- Department of Biotechnology and Bioinformatics, North Eastern Hill University, Shillong, 793022, India
| | - Yogesh Mishra
- Molecular Biology Section, Laboratory of Algal Biology, Center of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Antra Chatterjee
- Molecular Biology Section, Laboratory of Algal Biology, Center of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Ruchi Rai
- Molecular Biology Section, Laboratory of Algal Biology, Center of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Shivam Yadav
- Molecular Biology Section, Laboratory of Algal Biology, Center of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - L C Rai
- Molecular Biology Section, Laboratory of Algal Biology, Center of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
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Kafle D, Upadhayaya C, Chaurasia N, Agarwal A. Orthognathic Surgery for the Correction of Severe Skeletal Class III Malocclusion. Kathmandu Univ Med J (KUMJ) 2016; 14:90-93. [PMID: 27892450] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Skeletal Malocclusions results from the abnormal position of maxilla and mandible in relation with cranial base. These types of malocclusion are commonly treated by orthodontic teeth movement known as camouflage orthodontics. However severe skeletal malocclusions cannot be treated by orthodontics alone. Such cases need surgical intervention to align the position of the jaw along with orthodontic correction. This procedure is commonly known as Orthognathic Surgery. Orthognathic Surgery dates back to early eighteenth century but became popular on mid twentieth century. Though the prevalence of skeletal malocclusion is more than 1% the treatment facility was not available in Nepal till 2012. Here we present a case of Skeletal Class III malocclusion treated at Dhulikhel Hospital, Kathmandu University Hospital. For this case, double jaw surgery was performed by le-Fort I osteotomy and Bilateral Sagital Split Osteotomy. Orthognathic surgery has been routinely performed at this centre since then.
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Affiliation(s)
- D Kafle
- Department of Dentistry, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - C Upadhayaya
- Department of Dentistry, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - N Chaurasia
- Department of Dentistry, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - A Agarwal
- Department of Dentistry, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
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19
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Mishra Y, Hall M, Chaurasia N, Rai LC, Jansson S, Schröder WP, Sauer UH. Expression, purification, crystallization and preliminary X-ray crystallographic studies of alkyl hydroperoxide reductase (AhpC) from the cyanobacterium Anabaena sp. PCC 7120. Acta Crystallogr Sect F Struct Biol Cryst Commun 2011; 67:1203-6. [PMID: 22102027 DOI: 10.1107/s1744309111025747] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Accepted: 06/29/2011] [Indexed: 11/10/2022]
Abstract
Alkyl hydroperoxide reductase (AhpC) is a key component of a large family of thiol-specific antioxidant (TSA) proteins distributed among prokaryotes and eukaryotes. AhpC is involved in the detoxification of reactive oxygen species (ROS) and reactive sulfur species (RSS). Sequence analysis of AhpC from the cyanobacterium Anabaena sp. PCC 7120 shows that this protein belongs to the 1-Cys class of peroxiredoxins (Prxs). It has recently been reported that enhanced expression of this protein in Escherichia coli offers tolerance to multiple stresses such as heat, salt, copper, cadmium, pesticides and UV-B. However, the structural features and the mechanism behind this process remain unclear. To provide insights into its biochemical function, AhpC was expressed, purified and crystallized by the hanging-drop vapour-diffusion method. Diffraction data were collected to a maximum d-spacing of 2.5 Å using synchrotron radiation. The crystal belonged to space group P2(1)2(1)2(1), with unit-cell parameters a = 80, b = 102, c = 109.6 Å. The structure of AhpC from Anabaena sp. PCC 7120 was determined by molecular-replacement methods using the human Prx enzyme hORF6 (PDB entry 1prx) as the template.
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Affiliation(s)
- Yogesh Mishra
- Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, SE-901 87 Umeå, Sweden
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Mishra Y, Chaurasia N, Rai LC. Heat pretreatment alleviates UV-B toxicity in the cyanobacterium Anabaena doliolum: A proteomic analysis of cross tolerance. Photochem Photobiol 2008; 85:824-33. [PMID: 19076303 DOI: 10.1111/j.1751-1097.2008.00469.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
This study offers proteomic elucidation of heat pretreatment-induced alleviation of UV-B toxicity in Anabaena doliolum. Heat-pretreated cells exposed to UV-B showed improved activity of PSI, PSII, whole chain, (14)C fixation, ATP and NADPH contents compared to UV-B alone. Proteomic analysis using two-dimensional gel electrophoresis (2-DE), MALDI-TOF MS/MS and reverse transcription polymerase chain reaction (RT-PCR) of UV-B and heat pretreatment followed by UV-B-treated cells exhibited significant and reproducible alterations in nine proteins homologous to phycocyanin-alpha-chain (PC-alpha-chain), phycoerythrocyanin-alpha-chain (PEC-alpha-chain), hypothetical protein alr0882, phycobilisome core component (PBS-CC), iron superoxide dismutase (Fe-SOD), fructose-1,6-bisphosphate aldolase (FBA), nucleoside diphosphate kinase (NDPK), phosphoribulokinase (PRK) and ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCo) large chain. Except the PEC-alpha-chain, hypothetical protein alr0882 and PBS-CC, all other proteins showed upregulation at low doses of UV-B (U2) and significant downregulation at higher doses of UV-B (U5). The disruption of redox status, signaling, pentose phosphate pathway and Calvin cycle appears to be due to the downregulation of Fe-SOD, NDPK, FBA, PRK and RuBisCo thereby leading to the death of Anabaena. In contrast to this, the upregulation of all the above proteins in heat-pretreated cells, harboring different heat shock proteins (HSPs) like 60, 26 and 16.6, followed by UV-B treatment than only the UV-B-treated ones suggests a protective role of HSPs in mitigating UV-B toxicity.
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Affiliation(s)
- Yogesh Mishra
- Center of Advanced Study in Botany, Banaras Hindu University, Varanasi, India
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Chaurasia N, Mishra Y, Rai LC. Cloning expression and analysis of phytochelatin synthase (pcs) gene from Anabaena sp. PCC 7120 offering multiple stress tolerance in Escherichia coli. Biochem Biophys Res Commun 2008; 376:225-30. [DOI: 10.1016/j.bbrc.2008.08.129] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2008] [Accepted: 08/26/2008] [Indexed: 11/17/2022]
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Singh AK, Chaurasia N, Rahmani S, Srivastava J, Singh B. Mechanism of Ruthenium (III) Catalysis of Periodate Oxidation of Aldoses in Aqueous Alkaline Medium. Catal Letters 2004. [DOI: 10.1023/b:catl.0000027286.07404.48] [Citation(s) in RCA: 10] [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: 11/12/2022]
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Abstract
Beside sitosterol, sitosterolglucoside, and sopoletine, 7 flavonol glycosides have been isolated for the first time from flowers of URTICA DIOICA (male and female). Their structures were determined by chromatographic and spectroscopic methods (UV, FD-MS, (1)H-NMR, (13)C-NMR).
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Affiliation(s)
- N Chaurasia
- Institut für Pharmazeutische Biologie, Deutschhausstraße 17S, D-3550 Marburg/Lahn, Bundesrepublik Deutschland
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