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Ritish D, Reddy PV, Sreeraj VS, Chhabra H, Kumar V, Venkatasubramanian G, Muralidharan K. Oculomotor Abnormalities and Aberrant Neuro-Developmental Markers: Composite Endophenotype for Bipolar I Disorder: Anomalies Oculomotrices et Marqueurs Neuro-Développementaux Aberrants : Endophénotype Composite du Trouble Bipolaire I. Can J Psychiatry 2024:7067437241248048. [PMID: 38651336 DOI: 10.1177/07067437241248048] [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] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
BACKGROUND Neurological soft signs (NSSs), minor physical anomalies (MPAs), and oculomotor abnormalities were plausible biomarkers in bipolar disorder (BD). However, specific impairments in these markers in patients after the first episode mania (FEM), in comparison with first-degree relatives (high risk [HR]) of BD and healthy subjects (health control [HC]) are sparse. AIM OF THE STUDY This study aimed at examining NSSs, MPAs, and oculomotor abnormalities in remitted adult subjects following FEM and HR subjects in comparison with matched healthy controls. Investigated when taken together, could serve as composite endophenotype for BD. METHODS NSSs, MPAs, and oculomotor abnormalities were evaluated in FEM (n = 31), HR (n = 31), and HC (n = 30) subjects, matched for age (years) (p = 0.44) and sex (p = 0.70) using neurological evaluation scale, Waldrop's physical anomaly scale and eye tracking (SPEM) and antisaccades (AS) paradigms, respectively. RESULTS Significant differences were found between groups on NSSs, MPAs, and oculomotor parameters. Abnormalities are higher in FEM subjects compared to HR and HC subjects. Using linear discriminant analysis, all 3 markers combined accurately classified 72% of the original 82 subjects (79·2% BD, 56·70% HR, and 82·1% HC subjects). CONCLUSIONS AS and SPEM could enhance the utility of NSSs, and MPAs as markers for BD. The presence of these abnormalities in FEM suggests their role in understanding the etiopathogenesis of BD in patients who are in the early course of illness. These have the potential to be composite endophenotypes and have further utility in early identification in BD.
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Affiliation(s)
- Daniel Ritish
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, India
| | - Preethi V Reddy
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, India
| | - Vanteemar S Sreeraj
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, India
| | - Harleen Chhabra
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, India
| | - Vijay Kumar
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, India
| | | | - Kesavan Muralidharan
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, India
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Talukdar PM, Reddy PV, Bhargav PH, Subbanna M, Karmani S, Arasappa R, Subramanian GV, Kesavan M, Debnath M. Long-term Add-on Yoga Therapy Modulates Oxidative Stress Pathway and Offers Clinical Benefits in Major Depressive Disorder: A Randomized Controlled Trial. Int J Yoga 2023; 16:180-184. [PMID: 38463645 PMCID: PMC10919410 DOI: 10.4103/ijoy.ijoy_174_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: 09/04/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 03/12/2024] Open
Abstract
Background Yoga therapy (YT) as an adjunct treatment has reportedly been demonstrated to offer clinical benefits in major depressive disorder (MDD). Although a few biological pathways are suggested to mediate the effects of yoga, the precise mechanistic basis remains unknown. Oxidative stress pathway activation has consistently been linked to the pathobiology of MDD. Whether YT has a modulatory effect on the oxidative stress pathway in MDD is not adequately understood. Aim and Objectives In this study, we examined the impact of a course (3 months) of yoga as an add on therapy on the markers of the oxidative stress pathway in MDD patients. Methods Thirty-three MDD patients were randomized to the YT (n = 16) and waitlist control (WC) (n = 17) groups. Colorimetric estimation of the plasma malondialdehyde (MDA) and total antioxidant (AO) levels was performed in all the study participants using commercially available kits at the baseline and after 3 months. Results A significant reduction of plasma MDA levels was observed in MDD patients of YT group (P = 0.05) after 3 months of YT. Notably, the plasma MDA levels also decreased in MDD patients of WC group (P = 0.015) after the trial period. In addition, levels of total AO showed a trend toward significance only in MDD patients after 3 months of YT (P = 0.07). Conclusion: The current study suggests that the benefits of YT might be mediated through its modulatory role on the oxidative stress pathway in MDD.
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Affiliation(s)
- Pinku Mani Talukdar
- Department of Human Genetics, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Preethi V. Reddy
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Praerna Hemant Bhargav
- Department of Integrative Medicine, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Manjula Subbanna
- Department of Human Genetics, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Sneha Karmani
- Department of Integrative Medicine, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Rashmi Arasappa
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Ganesan Venkata Subramanian
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Muralidharan Kesavan
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Monojit Debnath
- Department of Human Genetics, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
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Reddy PV, Bojappen N, Reddy RP, Arumugham SS, Muralidharan K. Neurocognitive Deficits in Recently Diagnosed Young Remitted Bipolar I Disorder and At-Risk Subjects: Potential Endophenotypes? Indian J Psychol Med 2023; 45:390-396. [PMID: 37483584 PMCID: PMC10357910 DOI: 10.1177/02537176231165414] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/25/2023] Open
Abstract
Background Neurocognitive deficits have been reported consistently in euthymic bipolar disorder (BD) across studies. Endophenotype potential of such deficits have been reported in a few studies. However, data from the Indian subcontinent is sparse, and no studies had a sample (patients and high-risk group) aged 20-25 years, which is the actual risk period for developing BD. We studied cognitive deficits, as a potential endophenotype for BD, in recently diagnosed BD (FEM-first episode mania) in remission, young unaffected first-degree relatives (HR) of patients with BD, and healthy controls (HC). Methods Cross-sectional study design using convenient sampling was employed. We recruited FEM (n = 25), HR (n = 25), and age-matched HC (n = 25) between 18 and 30 years. All HR subjects were <25 years of age, which is the period of vulnerability for BD. All the groups were screened using MINI Version 6. Neurocognitive assessments were done using the NIMHANS neuropsychology battery. The cognitive domains assessed were processing speed, attention, working memory, executive functions, and visual and verbal memory. Results The three groups were comparable in age and sex (all P > 0.06). The mean (SD) age of the FEM subjects was 23.7 (3.47) years, and the mean duration of illness was 5.92 (2.94) months. Compared to the HC group, the FEM group performed poorly on multiple cognitive domains (all P < 0.05). Performance of the HR group was comparable to the FEM group, but they showed significantly poorer performance compared to HC on the verbal fluency test-controlled oral word association (COWA, F = 12.36, P = 0.001), and the visual learning and memory test-complex figure test-immediate recall (CFT-IR, F = 8.10 and p = 0.001). Conclusions Cognition is impaired very early in the course of BD. Visual memory and executive function (verbal fluency) have endophenotypic potential. These findings are particularly important given that the HR group were still within the vulnerable period to develop BD. These findings imply a tremendous potential for early diagnosis and prevention by early interventions in BD.
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Affiliation(s)
- Preethi V. Reddy
- Dept. of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Nandhini Bojappen
- Dept. of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Rajkumari P. Reddy
- Dept. of Clinical Psychology, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Shyam Sundar Arumugham
- Dept. of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Kesavan Muralidharan
- Dept. of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
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Reddy PV, Talukdar PM, Subbanna M, Bhargav PH, Arasappa R, Venkatasubramanian G, Muralidharan K, Debnath M. Multiple Complement Pathway-related Proteins Might Regulate Immunopathogenesis of Major Depressive Disorder. Clin Psychopharmacol Neurosci 2023; 21:313-319. [PMID: 37119224 PMCID: PMC10157013 DOI: 10.9758/cpn.2023.21.2.313] [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] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 04/16/2022] [Accepted: 04/30/2022] [Indexed: 05/01/2023]
Abstract
Objective Exacerbated inflammatory pathway has emerged as a predominant etiological construct of major depressive disorder (MDD). Innate immune molecules like complement proteins induce inflammatory responses and also regulate key neurobiological processes. However, there is a dearth of literature on the impact of critical complement proteins in MDD. Herein, plasma profiling of seven complement proteins was carried out to obtain a better insight into the role of the complement pathway in MDD. Methods Plasma levels of C1q, C3, C3b/iC3b, C4, Factor B, Factor H, and properdin were assayed in 22 patients with MDD and 27 healthy controls by multiplex suspension assay. The patients with MDD were diagnosed as per DSM IV-TR. Hamilton Depression Rating Scale (HAM-D), Montgomery Depression Rating Scale and Clinical Global Improvement were used for clinical assessments of the patients. The plasma levels of these complement proteins were also correlated with various clinical scores and phenotypes of MDD. Results The patients with MDD and healthy controls did not differ in terms of age and gender (p > 0.1). The patients with MDD had a mean duration of illness of around 3 years, with average number of depressive episodes being 6 and the mean HAM-D score was 19. Of the seven complement components, the plasma levels of C1q, Factor B, and Factor H (p ≤ 0.05) were significantly elevated in MDD patients compared to healthy controls. However, the plasma levels of these complement proteins were not found to correlate with the clinical profile of MDD patients. Conclusion Both Factor B and Factor H are crucial in the induction and regulation of the alternative pathway of complement activation. The alternative pathway also plays a critical role in inflammation. These findings suggest an important role of the alternative complement pathway in immuno-inflammation in MDD.
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Affiliation(s)
- Preethi V Reddy
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Pinku Mani Talukdar
- Department of Human Genetics, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Manjula Subbanna
- Department of Human Genetics, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Praerna H Bhargav
- Department of Integrative Medicine, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Rashmi Arasappa
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Ganesan Venkatasubramanian
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Kesavan Muralidharan
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Monojit Debnath
- Department of Human Genetics, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
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Arora S, Reddy PV, Desai G, Kesavan M, Chandra PS. Valproate prescription among reproductive age women with bipolar disorders-Are regulatory methods the only solution? Bipolar Disord 2023; 25:249-250. [PMID: 36843447 DOI: 10.1111/bdi.13314] [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] [Indexed: 02/28/2023]
Affiliation(s)
- Simran Arora
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Preethi V Reddy
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Geetha Desai
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Muralidharan Kesavan
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, India
| | - Prabha S Chandra
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, India
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Cohen A, Naslund JA, Chang S, Nagendra S, Bhan A, Rozatkar A, Thirthalli J, Bondre A, Tugnawat D, Reddy PV, Dutt S, Choudhary S, Chand PK, Patel V, Keshavan M, Joshi D, Mehta UM, Torous J. Relapse prediction in schizophrenia with smartphone digital phenotyping during COVID-19: a prospective, three-site, two-country, longitudinal study. Schizophrenia (Heidelb) 2023; 9:6. [PMID: 36707524 PMCID: PMC9880926 DOI: 10.1038/s41537-023-00332-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 01/13/2023] [Indexed: 01/28/2023]
Abstract
Smartphone technology provides us with a more convenient and less intrusive method of detecting changes in behavior and symptoms that typically precede schizophrenia relapse. To take advantage of the aforementioned, this study examines the feasibility of predicting schizophrenia relapse by identifying statistically significant anomalies in patient data gathered through mindLAMP, an open-source smartphone app. Participants, recruited in Boston, MA in the United States, and Bangalore and Bhopal in India, were invited to use mindLAMP for up to a year. The passive data (geolocation, accelerometer, and screen state), active data (surveys), and data quality metrics collected by the app were then retroactively fed into a relapse prediction model that utilizes anomaly detection. Overall, anomalies were 2.12 times more frequent in the month preceding a relapse and 2.78 times more frequent in the month preceding and following a relapse compared to intervals without relapses. The anomaly detection model incorporating passive data proved a better predictor of relapse than a naive model utilizing only survey data. These results demonstrate that relapse prediction models utilizing patient data gathered by a smartphone app can warn the clinician and patient of a potential schizophrenia relapse.
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Affiliation(s)
- Asher Cohen
- grid.38142.3c000000041936754XDivision of Digital Psychiatry, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA USA
| | - John A. Naslund
- grid.38142.3c000000041936754XDepartment of Global Health and Social Medicine, Harvard Medical School, Boston, MA USA
| | - Sarah Chang
- grid.38142.3c000000041936754XDivision of Digital Psychiatry, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA USA
| | - Srilakshmi Nagendra
- grid.416861.c0000 0001 1516 2246Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka India
| | | | - Abhijit Rozatkar
- grid.464753.70000 0004 4660 3923Department of Psychiatry, AIIMS Bhopal, All India Institute of Medical Sciences Bhopal, Bhopal, India
| | - Jagadisha Thirthalli
- grid.416861.c0000 0001 1516 2246Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka India
| | | | | | - Preethi V. Reddy
- grid.416861.c0000 0001 1516 2246Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka India
| | - Siddharth Dutt
- grid.416861.c0000 0001 1516 2246Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka India
| | - Soumya Choudhary
- grid.416861.c0000 0001 1516 2246Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka India
| | - Prabhat Kumar Chand
- grid.416861.c0000 0001 1516 2246Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka India
| | - Vikram Patel
- grid.38142.3c000000041936754XDepartment of Global Health and Social Medicine, Harvard Medical School, Boston, MA USA
| | - Matcheri Keshavan
- grid.38142.3c000000041936754XDivision of Digital Psychiatry, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA USA
| | - Devayani Joshi
- grid.38142.3c000000041936754XDivision of Digital Psychiatry, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA USA
| | - Urvakhsh Meherwan Mehta
- grid.416861.c0000 0001 1516 2246Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, Karnataka India
| | - John Torous
- grid.38142.3c000000041936754XDivision of Digital Psychiatry, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA USA
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Reddy PV, Anandan S, Rakesh G, Shivakumar V, Joseph B, Vasu SK, Agarwal SM, Muralidharan K, Venkatasubramanian G, Narayanaswamy JC. Emotion Processing Deficit in Euthymic Bipolar Disorder: A Potential Endophenotype. Indian J Psychol Med 2022; 44:145-151. [PMID: 35655991 PMCID: PMC9120978 DOI: 10.1177/02537176211026795] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Emotion processing deficits have been described in patients with bipolar disorder (BD) and are considered one of the core cognitive abnormalities in BD with endophenotype potential. However, the literature on specific impairments in emotion processing cognitive strategies (directive/cortical/higher versus intuitive/limbic/lower) in euthymic adult BD patients and healthy first-degree relatives/high-risk (HR) subjects in comparison with healthy controls (HCs) is sparse. METHODS We examined facial emotion recognition deficits (FERD) in BD (N = 30), HR (N = 21), and HC (N = 30) matched for age (years), years of education, and sex using computer-administered face emotions-Matching And Labeling Task (eMALT). RESULTS The three groups were significantly different based on labeling accuracy scores for fear and anger (FA) (P < 0.001) and sad and disgust (SD) (P < 0.001). On post-hoc analysis, HR subjects exhibited a significant deficit in the labeling accuracy of FA facial emotions (P < 0.001) compared to HC. The BD group was found to have significant differences in all FA (P = 0.004) and SD (P = 0.003) emotion matching as well as FA (P = 0.001) and SD (P < 0.001) emotion labeling accuracy scores. CONCLUSIONS BD in remission exhibits FERD in general, whereas specific labeling deficits of fear and anger emotions, indicating impaired directive higher order aspect of emotion processing, were demonstrated in HR subjects. This appears to be a potential endophenotype. These deficits could underlie the pathogenesis in BD, with possible frontolimbic circuitry impairment. They may have potential implications in functional recovery and prognosis of BD.
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Affiliation(s)
- Preethi V Reddy
- Dept. of Psychiatry & Translational Psychiatry Laboratory, Cognitive Neurobiology Division, Neurobiology Research Centre, National Institute of Mental Health & Neurosciences, Bengaluru, Karnataka, India
| | - Saravanakumar Anandan
- Dept. of Psychiatry & Translational Psychiatry Laboratory, Cognitive Neurobiology Division, Neurobiology Research Centre, National Institute of Mental Health & Neurosciences, Bengaluru, Karnataka, India
| | - Gopalkumar Rakesh
- Dept. of Psychiatry, University of Kentucky, Lexington, Kentucky, USA
| | - Venkatarama Shivakumar
- Dept. of Psychiatry & Translational Psychiatry Laboratory, Cognitive Neurobiology Division, Neurobiology Research Centre, National Institute of Mental Health & Neurosciences, Bengaluru, Karnataka, India
| | - Boban Joseph
- Dept. of Psychiatry & Translational Psychiatry Laboratory, Cognitive Neurobiology Division, Neurobiology Research Centre, National Institute of Mental Health & Neurosciences, Bengaluru, Karnataka, India
| | - Sunil Kalmady Vasu
- Canadian VIGOUR Centre, University of Alberta, Edmonton, Alberta, Canada
| | - Sri Mahavir Agarwal
- Centre for Addiction and Mental Health, Dept. of Psychiatry, University of Toronto, Toronto, Ontario, Canada
| | - Kesavan Muralidharan
- Dept. of Psychiatry & Translational Psychiatry Laboratory, Cognitive Neurobiology Division, Neurobiology Research Centre, National Institute of Mental Health & Neurosciences, Bengaluru, Karnataka, India
| | - Ganesan Venkatasubramanian
- Dept. of Psychiatry & Translational Psychiatry Laboratory, Cognitive Neurobiology Division, Neurobiology Research Centre, National Institute of Mental Health & Neurosciences, Bengaluru, Karnataka, India
| | - Janardhanan C Narayanaswamy
- Dept. of Psychiatry & Translational Psychiatry Laboratory, Cognitive Neurobiology Division, Neurobiology Research Centre, National Institute of Mental Health & Neurosciences, Bengaluru, Karnataka, India
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Lakhtakia T, Bondre A, Chand PK, Chaturvedi N, Choudhary S, Currey D, Dutt S, Khan A, Kumar M, Gupta S, Nagendra S, Reddy PV, Rozatkar A, Scheuer L, Sen Y, Shrivastava R, Singh R, Thirthalli J, Tugnawat DK, Bhan A, Naslund JA, Patel V, Keshavan M, Mehta UM, Torous J. Smartphone digital phenotyping, surveys, and cognitive assessments for global mental health: Initial data and clinical correlations from an international first episode psychosis study. Digit Health 2022; 8:20552076221133758. [PMID: 36386246 PMCID: PMC9647298 DOI: 10.1177/20552076221133758] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 09/30/2022] [Indexed: 11/11/2022] Open
Abstract
Objective To examine feasibility and acceptability of smartphone mental health app use
for symptom, cognitive, and digital phenotyping monitoring among people with
schizophrenia in India and the United States. Methods Participants in Boston, USA and Bhopal and Bangalore, India used a smartphone
app to monitor symptoms, play cognitive games, access relaxation and
psychoeducation resources and for one month, with an initial clinical and
cognitive assessment and a one-month follow-up clinical assessment.
Engagement with the app was compared between study sites, by clinical
symptom severity and by cognitive functioning. Digital phenotyping data
collection was also compared between three sites. Results By Kruskal-Wallis rank-sum test, we found no difference between app
activities completed or digital phenotyping data collected across the three
study sites. App use also did not correlate to clinical or cognitive
assessment scores. When using the app for symptom monitoring, preliminary
findings suggest app-based assessment correlate with standard cognitive and
clinical assessments. Conclusions Smartphone app for symptom monitoring and digital phenotyping for individuals
with schizophrenia appears feasible and acceptable in a global context.
Clinical utility of this app for real-time assessments is promising, but
further research is necessary to determine the long-term efficacy and
generalizability for serious mental illness.
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Affiliation(s)
- Tanvi Lakhtakia
- Division of Digital Psychiatry, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | | | - Prabhat Kumar Chand
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | | | - Soumya Choudhary
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Danielle Currey
- Division of Digital Psychiatry, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - Siddharth Dutt
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | | | - Mohit Kumar
- Department of Psychiatry, AIIMS Bhopal, All India Institute of Medical Sciences Bhopal, Bhopal, India
| | - Snehil Gupta
- Department of Psychiatry, AIIMS Bhopal, All India Institute of Medical Sciences Bhopal, Bhopal, India
| | - Srilakshmi Nagendra
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Preethi V Reddy
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Abhijit Rozatkar
- Department of Psychiatry, AIIMS Bhopal, All India Institute of Medical Sciences Bhopal, Bhopal, India
| | - Luke Scheuer
- Division of Digital Psychiatry, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | | | | | | | - Jagadisha Thirthalli
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | | | | | - John A Naslund
- Department of Global Health and Social Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Vikram Patel
- Department of Global Health and Social Medicine, Harvard Medical School, Boston, Massachusetts, USA
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Matcheri Keshavan
- Division of Digital Psychiatry, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - Urvakhsh Meherwan Mehta
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - John Torous
- Division of Digital Psychiatry, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
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Chithra NK, Reddy PV, Tansa KA, Arasappa R, Raj A, Jangam K, Kesavan M. Intimate partner violence in women with psychotic disorders. Asian J Psychiatr 2022; 67:102942. [PMID: 34864339 DOI: 10.1016/j.ajp.2021.102942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 11/18/2021] [Indexed: 11/02/2022]
Affiliation(s)
- Nellai K Chithra
- National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Preethi V Reddy
- National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - K A Tansa
- National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Rashmi Arasappa
- National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Aravind Raj
- National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Kavita Jangam
- National Institute of Mental Health and Neuro Sciences, Bengaluru, India
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Subbanna M, Talukdar PM, Abdul F, Debnath M, Reddy PV, Arasappa R, Venkatasubramanian G, Muralidharan K, Gangadhar BN, Bhargav PH, Karmani S. Long-term add-on Yoga therapy offers clinical benefits in major depressive disorder by modulating the complement pathway: A randomized controlled trial. Asian J Psychiatr 2021; 66:102876. [PMID: 34649098 DOI: 10.1016/j.ajp.2021.102876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 09/28/2021] [Indexed: 10/20/2022]
Affiliation(s)
- Manjula Subbanna
- Department of Human Genetics, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Pinku Mani Talukdar
- Department of Human Genetics, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Fazal Abdul
- Department of Human Genetics, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Monojit Debnath
- Department of Human Genetics, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India.
| | - Preethi V Reddy
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Rashmi Arasappa
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Ganesan Venkatasubramanian
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Kesavan Muralidharan
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Bangalore N Gangadhar
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Praerna H Bhargav
- Department of Integrative Medicine, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Sneha Karmani
- Department of Integrative Medicine, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
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Gulati K, Bhargav PH, Reddy PV, Govindaraj R, Ravindran A, Gayathri D, Karmani SJ, Udupa K, Philip M, Debnath M, Bharath RD, Sathyaprabha TN, Venkatasubramanian G, Muralidharan K. Adjunct yoga therapy: Influence on heart rate variability in major depressive disorder - A randomized controlled trial. Asian J Psychiatr 2021; 65:102832. [PMID: 34592624 DOI: 10.1016/j.ajp.2021.102832] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/03/2021] [Accepted: 08/26/2021] [Indexed: 10/20/2022]
Abstract
HRV is inversely proportional to severity of depression. Effect of 12-weeks adjunct yoga therapy on HRV in patients with MDD was assessed through a randomized controlled trial. Sixty-eight subjects (40 females) with mean age 31.58 ± 8.79 years, scoring ≥ 18 on HDRS were randomized to either (YG; n = 35) or (WG; n = 33). Linear mixed model analysis showed no significant difference between groups. On comparing change in mean percentage, substantial more decrease could be elicited only for LF/HF ratio in YG compared to WG, while being comparable for other variables across the groups. Findings suggest Yoga therapy may help in bringing parasympathetic dominance in patients with MDD.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Rose Dawn Bharath
- Department of the Neuroimaging and Interventional radiology, NIMHANS
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Mehta UM, Ektare A, Jakhar J, Basavaraju R, Sanjay TN, Naik SS, Syed FA, Bhargav PH, Reddy PV, Kelkar RS, Arumugham SS, Kesavan M, Thirthalli J, Gangadhar BN. A transdiagnostic evaluation of cortical inhibition in severe mental disorders using Transcranial Magnetic Stimulation. J Psychiatr Res 2021; 143:364-369. [PMID: 34571321 DOI: 10.1016/j.jpsychires.2021.09.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 09/16/2021] [Accepted: 09/23/2021] [Indexed: 10/20/2022]
Abstract
Multiple lines of investigations suggest the presence of cortical inhibition aberrations as central to the phenotypic manifestations of severe mental disorders. Transcranial Magnetic Stimulation (TMS) combined with electromyography can characterize these inhibitory processes in the motor cortex with satisfactory temporal precision. We examined TMS-evoked short- (SICI) and long-interval intracortical inhibition (LICI) and cortical silent period (CSP) as markers of GABAA- (SICI) and GABAB-mediated (LICI and CSP) cortical neurotransmission in symptomatic individuals with mania (n = 40), schizophrenia (n = 76), unipolar depression (n = 86), and OCD (n = 43), and compared them against similar recordings in healthy subjects (n = 125). We hypothesized transdiagnostic GABAA deficits across all the clinical groups and diagnosis-specific GABAB alterations in mania (increased) and OCD (decreased). After controlling for potential confounder variables (gender, education, benzodiazepine prescription, and motor threshold) using the ANCOVA, we observed no significant group difference in SICI (F = 1.04, P = 0.38), but a significant group effect in LICI (F = 16.29, P < 0.001) and CSP (F = 3.02, P = 0.018). Post-hoc analyses revealed that LICI was significantly reduced in OCD but increased in mania and schizophrenia with reference to the healthy group. Similarly, CSP was significantly reduced in OCD and depression groups as compared to the reference group. We observed that LICI and CSP, both followed similar descending gradients from mania through schizophrenia and depression to OCD; with significant elevation in mania, and reduction in depression and OCD, as compared to the healthy group. This pattern of GABAB-mediated cortical inhibition aberrations needs independent validation as potential state-markers of distinct clinical categories.
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Affiliation(s)
- Urvakhsh Meherwan Mehta
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India.
| | - Aboli Ektare
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
| | - Jitender Jakhar
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
| | - Rakshathi Basavaraju
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
| | - Tarasingh N Sanjay
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
| | - Shalini S Naik
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
| | - Farooq Ali Syed
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
| | - Praerna Hemant Bhargav
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
| | - Preethi V Reddy
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
| | - Radhika Suneel Kelkar
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
| | - Shyam Sundar Arumugham
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
| | - Muralidharan Kesavan
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
| | - Jagadisha Thirthalli
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
| | - Bangalore N Gangadhar
- Department of Psychiatry, National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, 560029, India
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13
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Bhargav PH, Reddy PV, Govindaraj R, Gulati K, Ravindran A, Gayathri D, Karmani SJ, Udupa K, Venkatasubramanian G, Philip M, Debnath M, Bharath RD, Sathyaprabha TN, Gangadhar BN, Muralidharan Pi K. Impact of a Course of Add-on Supervised Yoga on Cortical Inhibition in Major Depressive Disorder: A Randomized Controlled Trial. Can J Psychiatry 2021; 66:179-181. [PMID: 32844672 PMCID: PMC7918866 DOI: 10.1177/0706743720953247] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Praerna H Bhargav
- Department of Psychiatry, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Preethi V Reddy
- Department of Psychiatry, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Ramajayam Govindaraj
- Department of Neurophysiology, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Kankan Gulati
- Department of Psychiatry, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Arya Ravindran
- Department of Psychiatry, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - D Gayathri
- Department of Psychiatry, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Sneha J Karmani
- Department of Psychiatry, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Kaviraja Udupa
- Department of Neurophysiology, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | | | - Mariamma Philip
- Department of Biostatistics, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Monojit Debnath
- Department of Human Genetics, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Rose Dawn Bharath
- Department of Neuroimaging and Interventional Radiology, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - T N Sathyaprabha
- Department of Neurophysiology, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Bangalore N Gangadhar
- Department of Psychiatry, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
| | - Kesavan Muralidharan Pi
- Department of Psychiatry, 29148National Institute of Mental Health and Neuro Sciences, Bengaluru, India
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Someshwar A, Holla B, Pansari Agarwal P, Thomas A, Jose A, Joseph B, Raju B, Karle H, Muthukumaran M, Kodancha PG, Kumar P, Reddy PV, Kumar Nadella R, Naik ST, Mitra S, Mallappagiri S, Sreeraj VS, Balachander S, Ganesh S, Murthy P, Benegal V, Reddy JY, Jain S, Mahadevan J, Viswanath B, Narayanaswamy JC, Sivakumar PT, Kandasamy A, Kesavan M, Mehta UM, Venkatasubramanian G, John JP, Mukherjee O, Purushottam M, Kannan R, Mehta B, Kandavel T, Binukumar B, Saini J, Jayarajan D, Shyamsundar A, Moirangthem S, Vijay Kumar KG, Thirthalli J, Chandra PS, Gangadhar BN, Panicker MM, Bhalla US, Chattarji S, Varghese M, Raghu P, Rao M. Adverse childhood experiences in families with multiple members diagnosed to have psychiatric illnesses. Aust N Z J Psychiatry 2020; 54:1086-1094. [PMID: 32538179 DOI: 10.1177/0004867420931157] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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] [Indexed: 01/05/2023]
Abstract
OBJECTIVE Adverse childhood experiences are linked to the development of a number of psychiatric illnesses in adulthood. Our study examined the pattern of adverse childhood experiences and their relation to the age of onset of major psychiatric conditions in individuals from families that had ⩾2 first-degree relatives with major psychiatric conditions (multiplex families), identified as part of an ongoing longitudinal study. METHODS Our sample consisted of 509 individuals from 215 families. Of these, 268 were affected, i.e., diagnosed with bipolar disorder (n = 61), obsessive-compulsive disorder (n = 58), schizophrenia (n = 52), substance dependence (n = 59) or co-occurring diagnoses (n = 38), while 241 were at-risk first-degree relatives who were either unaffected (n = 210) or had other depressive or anxiety disorders (n = 31). All individuals were evaluated using the Adverse Childhood Experiences - International Questionnaire and total adverse childhood experiences exposure and severity scores were calculated. RESULTS It was seen that affected males, as a group, had the greatest adverse childhood experiences exposure and severity scores in our sample. A Cox mixed effects model fit by gender revealed that a higher total adverse childhood experiences severity score was associated with significantly increased risk for an earlier age of onset of psychiatric diagnoses in males. A similar model that evaluated the interaction of diagnosis revealed an earlier age of onset in obsessive-compulsive disorder and substance dependence, but not in schizophrenia and bipolar disorder. CONCLUSION Our study indicates that adverse childhood experiences were associated with an earlier onset of major psychiatric conditions in men and individuals diagnosed with obsessive-compulsive disorder and substance dependence. Ongoing longitudinal assessments in first-degree relatives from these families are expected to identify mechanisms underlying this relationship.
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Affiliation(s)
- Amala Someshwar
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India.,National Centre for Biological Sciences (NCBS), Bengaluru, India
| | - Bharath Holla
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Preeti Pansari Agarwal
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Anza Thomas
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Anand Jose
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Boban Joseph
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Birudu Raju
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Hariprasad Karle
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - M Muthukumaran
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Prabhath G Kodancha
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Pramod Kumar
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Preethi V Reddy
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Ravi Kumar Nadella
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Sanjay T Naik
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Sayantanava Mitra
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Sreenivasulu Mallappagiri
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Vanteemar S Sreeraj
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Srinivas Balachander
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Suhas Ganesh
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Pratima Murthy
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Vivek Benegal
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Janardhan Yc Reddy
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Sanjeev Jain
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Jayant Mahadevan
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
| | - Biju Viswanath
- Department of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru, India
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Reddy PV, Tansa KA, Raj A, Jangam K, Muralidharan K. Childhood abuse and intimate partner violence among women with mood disorders. J Affect Disord 2020; 272:335-339. [PMID: 32553375 DOI: 10.1016/j.jad.2020.03.113] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 02/02/2020] [Accepted: 03/28/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Mild to moderate association between childhood abuse (CA) and intimate partner violence (IPV) is reported among women from community samples. CA and IPV in clinical samples have shown strong association with adult psychopathology. METHODS We investigated the association between CA and IPV among women with mood disorders (MD), in comparison with healthy women (HW), at a tertiary mental health centre in India. Women diagnosed with mental health disorders (n=609) and healthy volunteers (n=100), between the ages of 18 to 50 years, were assessed as part of a larger study. For the purpose of this analysis, we have taken a sample of women with MD (n=251) this includes 121 women with unipolar depression, 130 with Bipolar disorder and HW (n=72), with intimate partners. RESULTS Incidences of childhood emotional abuse (χ2 =4.200, p=<0.05) and IPV [Severe combine abuse (t=3.924, p<0.01), Emotional abuse (t=3.895, p<0.01), Physical abuse (t=2.333, p<0.05)] were higher in women with MD as compared to HW. We noted a positive correlation between CA and IPV, in women with MD. And also CA came out as a predictor for IPV in later life among women with MD on regression analysis. LIMITATIONS No information about the total number of depressive and manic episodes, and also the mood ratings at the entry point. CONCLUSIONS CA and IPV have an additive effect which might lead to the expression of severe mental disorders like MD and these factors might also have an impact on course and outcome of mood disorder which needs further studies.
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Affiliation(s)
- Preethi V Reddy
- Department of Psychiatry, National Institute of Mental Health and Neuro Sciences, Bangalore 560029, India
| | - K A Tansa
- Department of Psychiatric Social Work, National Institute of Mental Health and Neuro Sciences, Bangalore 560029, India
| | - Aravind Raj
- Department of Psychiatric Social Work, National Institute of Mental Health and Neuro Sciences, Bangalore 560029, India
| | - Kavita Jangam
- Department of Psychiatric Social Work, National Institute of Mental Health and Neuro Sciences, Bangalore 560029, India
| | - Kesavan Muralidharan
- Department of Psychiatry, National Institute of Mental Health and Neuro Sciences, Bangalore 560029, India.
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Affiliation(s)
- Preethi V Reddy
- Dept. of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, Karnataka, India. Preethi V Reddy and Sowmya Selvaraj contributed equally to this article
| | - Sowmya Selvaraj
- Dept. of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, Karnataka, India. Preethi V Reddy and Sowmya Selvaraj contributed equally to this article
| | - Kesavan Muralidharan
- Dept. of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, Karnataka, India. Preethi V Reddy and Sowmya Selvaraj contributed equally to this article
| | - Bangalore N Gangadhar
- Dept. of Psychiatry, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, Karnataka, India. Preethi V Reddy and Sowmya Selvaraj contributed equally to this article
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Reddy PV, Anuroop L, Shetageri V, Kumar RK, Gopalakrishnan G. A Case of Frontotemporal Dementia Presenting as Nicotine Dependence and Carbohydrate Craving. Indian J Psychol Med 2019; 41:391-393. [PMID: 31391675 PMCID: PMC6657478 DOI: 10.4103/ijpsym.ijpsym_390_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 11/15/2022] Open
Affiliation(s)
- Preethi V Reddy
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Lavanya Anuroop
- Department of Psychiatry, M V Jayaram Medical College and Research Centre, Bangalore, Karnataka, India
| | - Veda Shetageri
- Department of Psychiatry, M V Jayaram Medical College and Research Centre, Bangalore, Karnataka, India
| | - Raghavendra K Kumar
- Department of Child Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Ganeshan Gopalakrishnan
- Department of Psychiatry, M V Jayaram Medical College and Research Centre, Bangalore, Karnataka, India
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Kulkarni KR, Reddy PV, Purty A, Arumugham SS, Muralidharan K, Reddy YJ, Yatham L, Jain S. Course and naturalistic treatment seeking among persons with first episode mania in India: A retrospective chart review with up to five years follow-up. J Affect Disord 2018; 240:183-186. [PMID: 30075389 DOI: 10.1016/j.jad.2018.07.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 02/19/2018] [Revised: 05/31/2018] [Accepted: 07/14/2018] [Indexed: 11/15/2022]
Abstract
BACKGROUND An understanding of the early course of Bipolar Disorder (BD) can contribute towards developing timely interventions. First episode mania (FEM) determines a diagnosis of bipolarity, and therefore, onset of BD-I. We investigated the course of BD-I over a five-year period after FEM by retrospective chart review. METHODS Charts of patients diagnosed with FEM in 2008 (n = 108) were reviewed. Data was extracted about FEM and subsequent course up to 5 years, for those who came for follow-up during this period. The factors influencing course were evaluated with statistical analyses including logistic regression and survival analysis. RESULTS The mean age at onset of BD was 26 ± 9.2 years and mean age at FEM was 27.1 ± 9 years. 41 (38%) patients had previous depression. Patients who returned for at least one follow-up were 60/108 (55.6%), with 54 (90%) of them experiencing another mood episode following FEM. Most recurrences occurred between 6 months to 1 year after FEM, with manic episodes occurring two-three times as frequently as depressive episodes. Good adherence to treatment was a predictor of fewer hospitalizations [B = -0.61; t = -3.1; p = 0.004]. LIMITATIONS The study was limited by its retrospective design and high number of dropouts. CONCLUSION The five-year course after FEM showed twice the number of manic compared to depressive recurrences, irrespective of when the recurrence occurred. Consistent with earlier reports from India, BD-I appears to be mania-predominant, even early in the course. This has significant implications in planning maintenance treatments.
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Affiliation(s)
- Karishma R Kulkarni
- Department of Psychiatry, National Institute of Mental Health and Neuro Sciences (INI), Bangalore 560029, Karnataka, India
| | - Preethi V Reddy
- Department of Psychiatry, National Institute of Mental Health and Neuro Sciences (INI), Bangalore 560029, Karnataka, India
| | - Abhishek Purty
- Department of Psychiatry, National Institute of Mental Health and Neuro Sciences (INI), Bangalore 560029, Karnataka, India
| | - Shyam Sundar Arumugham
- Department of Psychiatry, National Institute of Mental Health and Neuro Sciences (INI), Bangalore 560029, Karnataka, India
| | - Kesavan Muralidharan
- Department of Psychiatry, National Institute of Mental Health and Neuro Sciences (INI), Bangalore 560029, Karnataka, India.
| | - Yc Janardhan Reddy
- Department of Psychiatry, National Institute of Mental Health and Neuro Sciences (INI), Bangalore 560029, Karnataka, India
| | - Lakshmi Yatham
- Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2A1, Canada
| | - Sanjeev Jain
- Department of Psychiatry, National Institute of Mental Health and Neuro Sciences (INI), Bangalore 560029, Karnataka, India
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Narayanaswamy JC, Viswanath B, Reddy PV, Kumar KR, Thirthalli J, Gangadhar BN. Efficacy of ECT in bipolar and unipolar depression in a real life hospital setting. Asian J Psychiatr 2014; 8:43-6. [PMID: 24655625 DOI: 10.1016/j.ajp.2013.10.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 01/21/2013] [Revised: 10/05/2013] [Accepted: 10/09/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND It has been debated as to whether the polarity of mood disorder (bipolar versus unipolar) has prognostic significance for electroconvulsive therapy (ECT) outcome. In the treatment guidelines, ECT is recommended more readily for unipolar depression and not so for bipolar depression. This study aims to examine efficacy of bipolar and unipolar depression to ECT in a real life naturalistic setting. METHOD We studied the ECT parameters of all consecutive patients with a diagnosis of unipolar depression (recurrent depressive disorder, ≥2 episodes of depression) and bipolar depression referred for ECT between the months of July 2008 and December 2010 (BP-D: n=44) and (UP-D: n=106). RESULTS When bipolar depression was compared to unipolar depression, the average motor seizure duration (mean=46.9 and 46.7, t=-0.06, p=0.94), number of ECTs required for improvement (mean=6.4 and 6.5, t=0.17, p=0.86), duration of inpatient stay after ECT initiation in days (mean=16.2 and 16.6, t=0.23, p=0.81) and improvement as assessed using a Likert scale (Mann-Whitney U, Z=-0.09, p=0.92) were not statistically different between the groups. CONCLUSIONS We did not find any difference in efficacy of ECT between the two forms of depression in real life setting. This calls for justification of use of ECT in all patients with depression irrespective of the type of illness polarity and inclusion of ECT as a routine treatment option in bipolar depression guidelines.
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Affiliation(s)
- Janardhanan C Narayanaswamy
- Department of Psychiatry, National Institute of Mental Health And Neurosciences (NIMHANS), Bangalore 560029, India.
| | - Biju Viswanath
- Department of Psychiatry, National Institute of Mental Health And Neurosciences (NIMHANS), Bangalore 560029, India
| | - Preethi V Reddy
- Department of Psychiatry, National Institute of Mental Health And Neurosciences (NIMHANS), Bangalore 560029, India
| | - K Raghavendra Kumar
- Department of Psychiatry, National Institute of Mental Health And Neurosciences (NIMHANS), Bangalore 560029, India
| | - Jagadisha Thirthalli
- Department of Psychiatry, National Institute of Mental Health And Neurosciences (NIMHANS), Bangalore 560029, India
| | - Bangalore N Gangadhar
- Department of Psychiatry, National Institute of Mental Health And Neurosciences (NIMHANS), Bangalore 560029, India
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Abstract
The deployment of fingerprint sensors is increasingly becoming common and has now gained high user acceptance. However, fingerprint sensors are susceptible to spoofing using artificial materials or in worst case to the dismembered fingers. Fake/gummy fingerprints have shown to fool most commercial fingerprint systems. This paper proposes a new method of anti-spoofing using reliable liveness detection. The proposed method of liveness detection is based on the principle of pulse oximetry and involves the source of light originating from a probe at two wavelengths. The light is partly absorbed by haemoglobin, by amounts which differ depending on whether it is saturated with oxygen or deoxygenated haemoglobin. We then perform the computations for the absorption at two wavelengths to estimate the proportion of haemoglobin which is oxygenated. The computed percentage of oxygen in the blood, along with the heart pulse rate, determines the liveness of the enrolled biometric. Our experimental results demonstrate that the developed prototype can successfully thwart the spoof attacks (including those based on dismembered fingers).
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21
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Pardee AB, Reddy PV, Biswas DK, Li CJ. Apoptotic chemotherapies. Breast Cancer Res 2005. [PMCID: PMC4233489 DOI: 10.1186/bcr1068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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22
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Spakulová M, Králová-Hromadová I, Dudinák V, Reddy PV. Karyotype of Acanthocephalus lucii: the first record of supernumerary chromosomes in thorny-headed worms. Parasitol Res 2002; 88:778-80. [PMID: 12122438 DOI: 10.1007/s00436-002-0639-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 02/06/2002] [Accepted: 02/20/2002] [Indexed: 10/27/2022]
Abstract
The karyotype of Acanthocephalus lucii(Müller, 1776), a parasite of perch, consists of six autosomal biarmed chromosomes and two subtelocentric sex X chromosomes in females or one X in males. The sex determining mechanism is of the XX-X0 type. Most of the acanthocephalans (85%) exhibit small supernumerary metacentric B chromosomes, the number of which varies from one to five. Our data represent the first record of B chromosomes in thorny-headed worms. A possible relationship between the occurrence of B chromosomes and a heavy metal accumulation in acanthocephalan tissue from contaminated aquatic environments is briefly discussed.
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Affiliation(s)
- M Spakulová
- Parasitological Institute, Slovak Academy of Sciences, Hlinkova 3, 04001 Kosice, Slovak Republic.
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23
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Prabhu KS, Reddy PV, Gumpricht E, Hildenbrandt GR, Scholz RW, Sordillo LM, Reddy CC. Microsomal glutathione S-transferase A1-1 with glutathione peroxidase activity from sheep liver: molecular cloning, expression and characterization. Biochem J 2001; 360:345-54. [PMID: 11716762 PMCID: PMC1222234 DOI: 10.1042/0264-6021:3600345] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A 25 kDa subunit of glutathione S-transferase (GST) from sheep liver microsomes (microsomal GSTA1-1) with a significant selenium-independent glutathione peroxidase activity has been isolated and characterized. Several analytical criteria, including EDTA stripping, protease protection assay and extraction with alkaline Na(2)CO(3), indicate that the microsomal GSTA1-1 is associated with the inner microsomal membrane. The specific cDNA nucleotide sequence reveals that the enzyme is made up of 222 amino acid residues and shares approx. 73-83% sequence similarity to Alpha-class GSTs from different species. The molecular mass, as determined by electrospray mass ionization, is 25611.3 Da. The enzyme is distinct from the previously reported rat liver microsomal GST in both amino acid sequence and catalytic properties [Morgenstern, Guthenberg and DePierre (1982) Eur. J. Biochem. 128, 243-248]. The microsomal GSTA1-1 differs from the sheep liver cytosolic GSTs, reported previously from this laboratory, in its substrate specificity profile and molecular mass [Reddy, Burgess, Gong, Massaro and Tu (1983) Arch. Biochem. Biophys. 224, 87-101]. In addition to catalysing the conjugation of 4-hydroxynonenal with GSH, the enzyme also exhibits significant glutathione peroxidase activity towards physiologically relevant fatty acid hydroperoxides, such as linoleic and arachidonic acid hydroperoxides, as well as phosphatidylcholine hydroperoxide, but not with H(2)O(2). Thus the microsomal GSTA1-1 isoenzyme might have an important role in the protection of biological membranes against oxidative damage.
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Affiliation(s)
- K S Prabhu
- Department of Veterinary Science, 115 Henning Building, The Pennsylvania State University, University Park, PA 16802, USA
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24
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Biswas DK, Reddy PV, Pickard M, Makkad B, Pettit N, Pardee AB. Calmodulin is essential for estrogen receptor interaction with its motif and activation of responsive promoter. J Biol Chem 1998; 273:33817-24. [PMID: 9837972 DOI: 10.1074/jbc.273.50.33817] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.5] [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] [Indexed: 11/06/2022] Open
Abstract
Calmodulin (CaM) has been reported to have affinity for the estrogen receptor (ER). Observations reported here reveal a direct physical interaction between purified CaM and ER. This direct ER-CaM interaction may be an initial event preceding the assembly of ER plus auxiliary proteins into the active ER complex with its DNA motif, the estrogen response element. We demonstrate that CaM is an integral component of this complex by using a system reconstituted from purified ER and nuclear extract from ER-negative breast cancer cells and also with ER-depleted nuclear extract of an ER-positive breast cancer cell line. Although CaM is essential for formation of this complex, it is not sufficient, suggesting roles also of auxiliary proteins. CaM also is functionally required for activation of an ER-responsive promoter, in the 17beta-estradiol-ER pathway of hormone action and regulation of 17beta-estradiol-responsive gene expression that is associated with proliferation of mammary epithelial cells.
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Affiliation(s)
- D K Biswas
- Division of Cancer Biology, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA.
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25
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Reddy PV, Patel R, White, Jr. JF. Phylogenetic and developmental evidence supporting reclassification of cruciferous pathogens Phoma lingam and Phoma wasabiae in Plenodomus. ACTA ACUST UNITED AC 1998. [DOI: 10.1139/b98-154] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To evaluate the classification of Phoma lingam (Tode:Fr.) Desm. and Phoma wasabiae Yokogi in the genus Phoma, a phylogenetic study of Phoma spp. was conducted using ribosomal DNA internal transcribed spacer 1 sequences. The majority of the Phoma species included in the study clustered in a Phoma-Didymella clade (Venturiaceae). Phoma lingam and P. wasabiae consistently clustered outside of the Phoma-Didymella clade, instead forming the Plenodomus clade (Leptosphaeriaceae). This result supports classification of P. lingam and P. wasabiae in Plenodomus as has been proposed by earlier investigators. Features of the morphology and development of pycnidia of Phoma americana Morgan-Jones & White and P. lingam suggest that Phoma and Plenodomus may also be distinguishable morphologically. Our results suggest that difficulties of identification and classification in Phoma may be resolved by using a phylogenetic approach to classification.Key words: Coelomycetes, molecular systematics, pathogens, taxonomy.
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al-Shaikh AM, Reddy PV, Bizrah MB. Underlay tympanoplasty with anterior and posterior flaps for subtotal perforations. Otolaryngol Pol 1998; 52:137-40. [PMID: 9673110] [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] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
In conventional underlay tympanoplasty, post meatal flap is elevated and graft placed medial to the handle of maleus. Out of this present series of 200 ears, in 90 cases posterior flap technique and in 110 cases both posterior and anterior flap was applied and results are studied after median observation time of 20 months. The success rate with combined anterior/posterior flap is better compared to the posterior flap alone. Different techniques described by various authors for tympanoplasty are also discussed in this paper.
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Affiliation(s)
- A M al-Shaikh
- Al-Mosada ENT Center King Fahd Hospital, Jeddah, K.S.A
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27
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Abstract
The effects of reduced glutathione (GSH) and glutathione disulfide (GSSG) on lipid peroxidation were investigated in rat liver microsomes containing deficient or adequate amounts of alpha-tocopherol (alpha-TH). Rates of formation of thiobarbituric acid reactive substances (TBARS) as well as rates of consumption of alpha-TH and O2 were decreased by GSH and were more pronounced in the NADPH-dependent assay system than in the ascorbate-dependent system. The GSH-dependent inhibition of lipid peroxidation was potentiated by GSSG in the NADPH-dependent assay system, but it had no effect in the nonenzymatic system. Diphenyliodonium chloride, an inhibitor of NADPH cytochrome P-450 reductase, completely prevented lipid peroxidation in the NADPH-dependent assay system whereas it had no effect on the ascorbate-dependent system. This is further evidenced by the fact that purified rat liver microsomal NADPH cytochrome P-450 reductase (EC 1.6.2.4) was inhibited approximately 24% and 52% by 5 mM GSH and 5 mM GSH + 2.5 mM GSSG, respectively. Glutathione disulfide alone had no effect on reductase activity. Similarly, other disulfides such as cystine, cystamine and lipoic acid were without effect on reductase activity. These results clearly delineate different mechanisms underlying the combined effects of GSH and GSSG on microsomal lipid peroxidation in rat liver. One mechanism involves recycling of microsomal alpha-TH by GSH during oxidative stress via a labile protein, ostensibly associated with "free radical reductase" activity. A second glutathione-dependent mechanism appears to be mediated through the inhibition of NADPH cytochrome P-450 reductase. The enhanced inhibition by GSH + GSSG of microsomal lipid peroxidation in the NADPH-dependent assay system suggests suppression of the initiation phase at the level of NADPH cytochrome P-450 reductase which is independent of microsomal alpha-TH.
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Affiliation(s)
- R W Scholz
- Environmental Resources Research Institute and Department of Veterinary Science, The Pennsylvania State University, University Park 16802, USA
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Cao YZ, Reddy PV, Sordillo LM, Hildenbrandt GR, Reddy CC. Evidence for G-protein-dependent and G-protein-independent activation of phospholipase D in lymphocytes. Biochem Biophys Res Commun 1996; 229:630-4. [PMID: 8954949 DOI: 10.1006/bbrc.1996.1855] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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] [Indexed: 02/03/2023]
Abstract
Previously we reported that tumor-promoting phorbol esters stimulate phospholipase D (PLD) independent of protein kinase C (PKC) activation in bovine lymph node lymphocytes. (Cao et al., Biochem. Biophys. Res. Commun. 171, 955-962, 1990; 217, 908-915, 1995). In the present study, we examined the effects of prostagladins (PGs), E2, F2 alpha, D2, and H2 on PLD activity as measured by conversion of [1-14C] arachidonic acid-labeled phospholipids into phosphatidylethanol (PEt) in bovine lymph node lymphocytes. Prostaglandins stimulated the formation of PEt at an optimal concentration of 10 microM with relative stimulatory effect on the order of PGE2 > PGF2 alpha > PGH2 > PGD2. The PGE2-stimulated formation of PEt was dose-dependent in the range of 0.1 to 10 microM and was not inhibited by PKC inhibitors staurosporine and K252a. When both PGE2 and 12-0-tetradecanoylphorbol-13-acetate (TPA) were included, their effect on the PLD activation was additive. Furthermore, NaF, a G-protein activator, stimulated the PEt formation. Interestingly, the stimulatory effects of PGE2 and NaF were not additive; however, the formation of PEt by NaF and TPA was additive. These results suggest that similar to TPA, PGs increase PLD activity independent of PKC and the stimulation by PGs and TPA in lymphocytes may involve both G-protein-dependent and G-protein-independent signaling pathways.
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Affiliation(s)
- Y Z Cao
- Environmental Resources Research Institute, Pennsylvania State University, University Park 16802, USA
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29
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Scholz RW, Reddy PV, Liken AD, Reddy CC. Inhibition of rat liver microsomal NADPH cytochrome P450 reductase by glutathione and glutathione disulfide. Biochem Biophys Res Commun 1996; 226:475-80. [PMID: 8806659 DOI: 10.1006/bbrc.1996.1380] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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] [Indexed: 02/02/2023]
Abstract
Previously we have demonstrated inhibition of lipid peroxidation by reduced glutathione (GSH) in rat liver microsomes that is dependent upon the presence of alpha-tocopheral (alpha-TH) in the membranes. Glutathione disulfide (GSSG) potentiated the inhibitory effect of GSH in an enzymatic (NADPH-dependent) lipid peroxidation system in rat liver microsomes; however, inhibition by GSH + GSSG is independent of alpha-TH. When we repeated these experiments with a non-enzymatic system (ascorbate/ADP) to stimulate lipid peroxidation, GSSG did not potentiate the inhibitory effect of GSH. To delineate the mechanism of inhibition of microsomal lipid peroxidation by GSH + GSSG, we examined the effects of these compounds on cytochrome P-450 reductase (EC 1.6.2.4), an important component of the NADPH-dependent enzymatic lipid peroxidation system. It was observed that GSH alone caused about 25% and 21% inhibition of reductase activity in crude microsomes and partially purified enzyme preparations, respectively. There was no inhibition of reductase activity by GSSG alone in either crude microsomes or partially purified enzyme preparations. However, when added together, GSH and GSSG enhanced the inhibition of reductase activity in crude microsomes and partially purified enzyme by 39% and 56%, respectively. We speculate that one possible mechanism for the inhibition of NADPH-dependent lipid peroxidation by GSH + GSSG is, in part, due to inhibition of NADPH cytochrome P-450 reductase, thus affecting the initiation phase of lipid peroxidation.
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Affiliation(s)
- R W Scholz
- Environmental Resources Research Institute, Pennsylvania State University, University Park 16802, USA
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30
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Reddy PV, Lam CK, Belanger FC. Mutualistic fungal endophytes express a proteinase that is homologous to proteases suspected to be important in fungal pathogenicity. Plant Physiol 1996; 111:1209-18. [PMID: 8756501 PMCID: PMC160998 DOI: 10.1104/pp.111.4.1209] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Many cultivated and wild grass species are hosts to mutualistic fungal endophytes. These associations are ecologically and agronomically significant, yet little is known regarding the physiological aspects of the interaction. In the Poa ampla/Acremonium typhinum interaction, a fungal serine proteinase, At1, is surprisingly abundant and may constitute 1 to 2% of the total leaf-sheath protein. Sequence analysis of cDNA and genomic clones indicates that proteinase At1 is a member of the eukaryotic subtilisin-like protease family. It is homologous to proteases suspected to be virulence factors in fungal pathogens of insects, nematodes, and other fungi. Gel blot analysis of RNA extracted from infected leaf-sheath tissue indicates that the proteinase At1 transcript level is extremely high. RNA gel blots and immunoblots of purified enzymes indicate that similar proteinases are produced by Epichloë festucae and Acremonium lolii, the fungal endophytes infecting Festuca rubra subsp. rubra and Lolium perenne, respectively. Fungal expression of proteinase At1-like enzymes may be a general feature of endophyte infection.
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Affiliation(s)
- P V Reddy
- Department of Plant Pathology, Rutgers University, New Brunswick, New Jersey 08903, USA
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Cao YZ, Mastro AM, Eskew ML, Hildenbrandt G, Reddy PV, Reddy CC. The mechanism of sphingosine enhancement of phorbol ester-mediated phospholipase D activation in lymphocytes. Biochem Biophys Res Commun 1995; 217:908-15. [PMID: 8554615 DOI: 10.1006/bbrc.1995.2857] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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] [Indexed: 01/31/2023]
Abstract
Tumor-promoting phorbol esters stimulate the production of phosphatidylethanol (PEt) in bovine lymph node lymphocytes through the activation of Phospholipase D (PLD). Sphingosine enhanced the 12-O-tetradecanoylphorbol-13-acetate (TPA)-mediated formation of PEt in lymphocytes, while it had no effect by itself. Interestingly, the incorporation of labeled arachidonic acid into phospholipids was increased by sphingosine. Examination of the effect of sphingosine along with TPA on the incorporation of [1-14C]labeled-arachidonic acid into individual phospholipids revealed that they enhanced significantly the specific activity of only PC and lyso-PC fractions. These observations indicate that sphingosine does not activate PLD directly as TPA does. It appears that sphingosine increases the specific radioactivity of the substrate pool for PLD which results in an apparent increase in PEt when both sphingosine and TPA are present.
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Affiliation(s)
- Y Z Cao
- Department of Veterinary Science, Pennsylvania State University, University Park 16802, USA
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Abstract
Two in vitro experiments were conducted to determine the rates of lipolysis and the extent of biohydrogenation of fat from raw or processed soybeans and to examine the subsequent effects on fiber digestibilities. In Experiment 1, substrates containing soy oil, raw soybeans, extruded soybeans, and soybeans roasted at 132, 146, or 163 degrees C were incubated with ruminal contents for 2, 4, 6, 12, or 24 h; and release of FFA was measured. The FFA released from substrates containing soy oil, extruded soybeans, and raw or roasted soybeans reached maxima at incubations of 4, 6, and 12 h, respectively. As the roasting temperature increased from 132 to 163 degrees C, release of FFA decreased at incubations of 2, 12, and 24 h. Fatty acids in roasted soybeans were subjected to less biohydrogenation than those in raw or extruded soybeans, suggesting that FFA of roasted soybeans are partially protected from ruminal bacteria. In Experiment 2, ground alfalfa hay was added to substrates used previously to determine the effect of release rate of FFA on ADF and NDF digestibilities. At all incubation times, the substrates containing soy oil and extruded soybeans had lower digestibilities, and those containing raw or roasted soybeans had higher digestibilities of NDF and ADF.
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Affiliation(s)
- P V Reddy
- Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506-1608
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Abstract
Two different fractions of cdk2 and cdc2 have been found in the nucleus of HeLa cells. One, which can be extracted by nuclease treatment, possibly associated with DNA- or RNA-containing structures and another one, which is bound to the nuclear matrix. Nuclear cdk2 forms high molecular weight complexes which migrate at the same position as DNA polymerase alpha and proliferating cell nuclear antigen in sucrose gradient centrifugation experiments. These results suggest that nuclear cdk2 complexes could be associated with the replication factories. Immunoprecipitation experiments reveal that nuclear cdk2 complexes display histone H1-kinase activity and phosphorylate a protein of 18 kDa which is present in these complexes.
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Affiliation(s)
- M Jaumot
- Department of Cell Biology, Faculty of Medicine, University of Barcelona, Spain
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Abstract
1. The performance of White Leghorn laying hens on diets providing pearl millet (Pennisetum typhoides) at 300 and 600 g/kg to replace maize, part per part, or "maize mix" isoenergetically and isonitrogenously in the first experiment and at 600 g/kg diet to replace maize in toto, part per part, in the second experiment were examined. In the first experiment, 3 groups of 12 laying hens were placed on each of the 5 dietary treatments for 3 x 28 d, whereas in the second experiment, each of the two diets was offered to 10 groups of 15 laying hens for 6 x 28 d. 2. Inclusion of pearl millet in the diet at the expense of maize, part per part, did not significantly influence hen-day egg production, feed intake, feed efficiency and body weight in either experiment. Incorporation of pearl millet isoenergetically at the expense of "maize mix" at any level, i.e. 300 g or 600 g/kg (Experiment 1), also did not influence hen-day egg production but at the end of periods 2 and 3 did result in decreased feed intakes with consequent improvements in feed efficiency. 3. Egg weight in general showed a tendency to improve with diets providing pearl millet at 600 g/kg. 4. Profits from egg sales over feed cost were directly proportional to the inclusion of pearl millet in the diet either at the expense of maize, part per part, or "maize mix" isoenergetically.
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Affiliation(s)
- A M Kumar
- Department of Poultry Science, College of Veterinary Science, Tirupati, India
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Studzinski GP, Shankavaram UT, Moore DC, Reddy PV. Association of c-myc protein with enzymes of DNA replication in high molecular weight fractions from mammalian cells. J Cell Physiol 1991; 147:412-9. [PMID: 1648564 DOI: 10.1002/jcp.1041470305] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [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] [Indexed: 12/28/2022]
Abstract
Oncoprotein c-myc is expressed in proliferating but not quiescent mammalian cells, and its overexpression or inappropriate expression is associated with malignant transformation. However, in spite of an intense interest, the normal function of this protein has remained elusive. As a step towards the elucidation of the function of c-myc protein, we studied its distribution within several types of cells, including HL 60, K 562, COLO 320, and CHEF/18 cells. In all of the cells studied, c-myc protein was detected in high molecular weight protein fractions, in 350-600 Kd range, in gel-exclusion chromatography and sucrose gradient centrifugation. This distribution of c-myc protein coincided with the distribution of DNA polymerase alpha and several other enzymes necessary for DNA replication. The data suggest that c-myc product may be a component of the replitase complex of enzymes involved in nuclear DNA replication.
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Affiliation(s)
- G P Studzinski
- Department of Laboratory Medicine and Pathology, UMDNJ-New Jersey Medical School, Newark 07103
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36
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Abstract
The hydrolytic activity of microsomal phospholipase D from canine cerebral cortex was measured by a radiochemical assay using 1,2-dipalmitoyl-sn-glycerol-3-phosphoryl[3H]choline and 1-palmitoyl-2-[9,10(n)-3H]palmitoyl-sn-glycerol-3-phosphorylcholine as the exogenous substrates. Of several detergents tested, Triton X-100 was found to be the most effective in allowing expression of phospholipase D hydrolytic activity. The microsomal phospholipase D does not require any metal ion for its hydrolytic activity. Calcium and magnesium were slightly inhibitory between concentrations of 1 and 4 mM, but zinc was greatly inhibitory, causing a loss of greater than 90% activity at the 4 mM concentration. Non-hydrolyzable guanine nucleotide analogues such as guanosine 5'-(3-O-thio)triphosphate and guanyl-5'-yl-(beta, gamma-methylene)diphosphonate but not guanosine 5'-(2-thio)diphosphate were able persistently to stimulate phospholipase D hydrolytic activity at micromolar concentrations. Guanosine 5'-(2-thio)diphosphate was capable of partially blocking guanosine 5'-(3-O-thio)triphosphate stimulation of phospholipase D. Aluminum fluoride was able to cause a two- to threefold increase in hydrolytic activity of the phospholipase D. Cholera toxin had a stimulatory effect on the hydrolytic activity of phospholipase D, whereas islet-activating protein pertussis toxin had no effect. These results indicate that regulation of microsomal phosphatidylcholine phospholipase D activity by the guanine nucleotide-binding protein(s) in canine cerebral cortex may play an important role in signal transduction processes as well as in brain choline metabolism.
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Affiliation(s)
- Z Qian
- Department of Biochemistry, School of Medicine, University of Minnesota, Duluth 55812
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Gutfeld MB, Reddy PV, Morse GD. Vancomycin-associated exfoliative dermatitis during continuous ambulatory peritoneal dialysis. Drug Intell Clin Pharm 1988; 22:881-2. [PMID: 2976665 DOI: 10.1177/106002808802201109] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Vancomycin is commonly prescribed to patients undergoing continuous ambulatory peritoneal dialysis (CAPD) for catheter-related infections and acute episodes of peritonitis. Although adverse dermatological reactions have been reported secondary to the rapid intravenous infusion of vancomycin, the intraperitoneal route of administration has been used routinely during CAPD without these effects. This case report describes a CAPD patient with systemic lupus erythematosus who developed erythema multiforme that progressed to exfoliative dermatitis during intermittent intraperitoneal vancomycin therapy for a catheter-related exit-site/tunnel infection.
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Kulkarni ML, Reddy PV. Prevalence of HBsAg in asymptomatic carrier mothers and vertical transmission in South India. Am J Dis Child 1988; 142:124-5. [PMID: 3257639 DOI: 10.1001/archpedi.1988.02150020018011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Abstract
Dog heart microsomes catalyze the transfer of acyl groups from the sn-2 position of phosphatidylcholine (PC) to lysophosphatidylserine (lysoPS) in the presence of coenzyme A (CoA) at pH optima of 4.5-5.0 and 7.5. Acyl transfer activity at acidic pH is about three times higher than at neutral pH. Transacylation of lysoPS by acyl transfer from PC with dog heart microsomes at neutral pH favors arachidonate over linoleate by a factor of 2.1, whereas free linoleic acid is favored by a factor of 3.7 over arachidonic acid for lysoPS acylation in the presence of acyl-CoA-generating cofactors. Considering the location and acyl composition of myocardial PS, it appears that both acyl transfer from PC and utilization of unesterified fatty acids may be involved in the acylation of lysoPS at its sn-2 position.
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Affiliation(s)
- P V Reddy
- Hormel Institute, University of Minnesota, Austin 55912
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41
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Abstract
We have recently shown that dog heart microsomes catalyze the transfer of acyl groups from the sn-2 position of exogenous phosphatidylcholine to lysophosphatidylethanolamine with strong preference for arachidonate over linoleate (Biochem. Biophys. Res. Commun. 129, 381-388 (1985)). We now report that the addition of 0.5 mM CoA enhances the acyl transfer activity 3-4-fold but reduces the selectivity for arachidonate. Acyl transfer in the absence of CoA exhibits a pH optimum of 7.5-8.5, whereas two pH optima (7.5 and 4.5) are observed in the presence of CoA with transfer activity at pH 4.5 exceeding that of pH 7.5 by 4-5-fold. The plasmalogen (alkenyl) analog of lysophosphatidylethanolamine is an equally effective acyl acceptor in the absence of CoA but less effective in its presence. The microsomal acyl-CoA/lysophosphatidylethanolamine acyltransferase does not favor arachidonate over linoleate. Therefore, transacylation from phosphatidylcholine may account for the high arachidonate content of dog heart microsomal phosphatidylethanolamine and its plasmalogen analog. In fact, acyl transfer from endogenous lipids to 1-[1'-14C]palmitoyl-2-lyso-sn-glycerophosphoethanolamine results in the generation of mostly (over 80%) tetraunsaturated phosphatidylethanolamine. This proportion is reduced by the addition of CoA and, even more, by CoA plus acyl-CoA-generating cofactors. We conclude that in dog heart microsomes, lysophosphatidylethanolamine can be acylated by different mechanisms, of which the CoA-independent transacylase exhibits the greatest acyl selectivity.
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Natarajan V, Schmid PC, Reddy PV, Zuzarte-Augustin ML, Schmid HH. Occurrence of N-acylethanolamine phospholipids in fish brain and spinal cord. Biochim Biophys Acta 1985; 835:426-33. [PMID: 4016139 DOI: 10.1016/0005-2760(85)90111-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
N-Acylethanolamine phospholipids were identified in the central nervous system of the fresh water fish, pike (Esox lucius) and carp (Cyprinus carpio), at levels ranging from 0.1 to 0.9% of total phospholipid. The N-acylethanolamine phospholipids of carp brain were isolated and characterized by chemical, biochemical and spectroscopic methods. Two major species, 1,2-diacyl-sn-glycero-3-phospho(N-acyl)ethanolamines (approx. 30%) and 1-O-(1'-alkenyl)-2-acyl-sn-glycero-3-phospho(N-acyl)ethanolamines (approx. 70%) were identified. The N-acyl groups of each species consisted primarily of 16:0 (approx. 60%) but also contained 16:1, 18:0 and 18:1 (approx. 10% each) and a number of trace constituents. The N-acylethanolamine phospholipids had O-acyl and O-alkenyl group compositions similar but not identical to those of the ethanolamine phospholipids of the same tissue. N-Acylethanolamine phospholipids were present in all subcellular fractions of carp brain, except mitochondria.
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Abstract
Dog heart microsomes catalyze the transfer of acyl groups from the sn-2 position of exogenous phosphatidylcholine to 1-acyl lysophosphatidylethanolamine. Approximately equal amounts of free fatty acids are produced as well. The reaction exhibits a pH optimum of 7.5-8.5 and does not require Ca2+ or other divalent cations. The reaction proceeds in the absence of exogenous coenzyme A but acyl transfer is enhanced by its addition. The transacylase exhibits a strong preference for arachidonate over linoleate and thus may be involved in the maintenance of the high amounts of arachidonate found in microsomal ethanolamine phospholipids.
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Reddy PV, Schmid PC, Natarajan V, Muramatsu T, Schmid HH. Properties of canine myocardial phosphatidylethanolamine N-acyltransferase. Biochim Biophys Acta 1984; 795:130-6. [PMID: 6466692 DOI: 10.1016/0005-2760(84)90113-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Dog heart contains a membrane bound N-acyltransferase (transacylase) which transfers acyl groups from the sn-1 position of membrane phospholipids to the amino group of ethanolamine phospholipids in the presence of millimolar Ca2+ concentrations. Using crude membrane preparations, we found this N-acyltransferase activity to be heat sensitive and inhibited by sulfhydryl reagents. Pretreatment of a membrane fraction with trypsin reduced N-acyltransferase activity to 60% while pretreatment with trypsin and Triton X-100 together reduced it to 30% of the control value. At pH 8.0 both Sr2+ and Mn2+ could fully substitute for Ca2+ with respect to optimum ion concentration and molecular species of the product formed in dog heart membranes from endogenous substrates. Ba2+ was equally effective in achieving N-acylation of ethanolamine phospholipids while other divalent cations were less effective or ineffective. The reaction exhibited a pH optimum of 8.5 to 9.0 with both Ca2+ and Sr2+ while Mn2+ precipitated above pH 8.0 resulting in decreased N-acylation activity. Both phosphatidylcholine and 1-acyl lysophosphatidylcholine could serve as acyl donors. Triton X-100 at a concentration of 0.1% stimulated acyl transfer from exogenous phosphatidylcholine but inhibited acyl transfer from lysophosphatidylcholine.
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Abstract
N- Acylphosphatidylethanolamine , incubated with dog brain homogenate or microsomes, was hydrolyzed to phosphatidic acid and N-acylethanolamine by a phosphodiesterase of the phospholipase D type. In the absence of F-, phosphatidic acid was further hydrolyzed to diacylglycerol and Pi while N-acylethanolamine was hydrolyzed by an amidase to fatty acid and ethanolamine. The phosphodiesterase showed an alkaline pH optimum and was also active towards N- acetylphosphatidylethanolamine , N-acyl-lysophosphatidylethanolamine, and glycerophospho (N-acyl)ethanolamine but showed little activity toward phosphatidylethanolamine and phosphatidylcholine. Ca2+ stimulated slightly at low concentrations but inhibited at higher concentrations. Triton X-100 stimulated the hydrolysis of N- acylphosphatidylethanolamine , inhibited that of N-acyl-lysophosphatidylethanolamine and glycerophospho (N-acyl)ethanolamine, and had no effect on phosphatidylethanolamine or phosphatidylcholine hydrolysis. The N-acylethanolamine hydrolase (amidase) was also present in the microsomal fraction and exhibited a pH optimum of 10.0. In addition to hydrolysis by the phosphodiesterase, N- acylphosphatidylethanolamine was also catabolized by microsomal phospholipases A1 and/or A2 to N-acyl-lysophosphatidylethanolamine, some of which was further hydrolyzed to glycerophospho (N-acyl)ethanolamine.
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Abstract
Dog brain homogenates and subcellular preparations incubated in the presence of Ca2+ produced a new phospholipid that was isolated and identified by its infrared spectrum and by chemical degradation as a mixture of 1,2-diacyl, alkenylacyl, and alkylacyl sn-glycero-3-phospho(N-acyl)ethanolamines, 50, 45, and 5%, respectively. The N-acyl groups consisted almost exclusively of 16:0, 18:0, and 18:1 fatty acids. Formation of N-acylethanolamine phospholipids from endogenous substrates was linear for about 90 min at approximately 4.5 nmol/h/mg protein and exhibited a pH optimum of 10. Biosynthetic activity was associated with particulate fractions, primarily microsomes, synaptosomes, and mitochondria, but not with myelin. In each case, small amounts (approximately 0.5 nmol/h/mg protein) of long-chain N-acylethanolamines were also produced. Incubation of dog brain microsomes with 1,2-di[1'-14C]palmitoyl glycerophosphocholine yielded N-acylethanolamine phospholipids labeled at both N-acyl (55%) and O-acyl (45%) moieties. It appears that dog brain organelles may contain a phosphatidylethanolamine N-acyl transferase (transacylase) analogous to that recently demonstrated in the myocardial tissue.
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Schmid PC, Reddy PV, Natarajan V, Schmid HH. Metabolism of N-acylethanolamine phospholipids by a mammalian phosphodiesterase of the phospholipase D type. J Biol Chem 1983; 258:9302-6. [PMID: 6308001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Rat heart contains a membrane-bound phosphodiesterase of the phospholipase D type which catalyzes the hydrolysis of 1,2-diacyl-sn-glycero-3-phospho(N-acyl)ethanolamine to N-acylethanolamine and phosphatidic acid. The enzyme also hydrolyzes the corresponding alkenylacylglycerophospho(N-acyl)ethanolamine and N-acylethanolamine lysophospholipids but not phosphatidylcholine or phosphatidylethanolamine. The activity is highest in the microsomal fraction, does not require Ca2+ or Mg2+, and is stimulated by Triton X-100. Bile salts, other ionic detergents, and Zn2+ are inhibitory. Hydrolysis occurs over a wide pH range, with the activity at acid pH being stimulated by freezing and thawing. Other rat tissues also release N-acylethanolamine from N-acylethanolamine phospholipids.
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Schmid PC, Reddy PV, Natarajan V, Schmid HH. Metabolism of N-acylethanolamine phospholipids by a mammalian phosphodiesterase of the phospholipase D type. J Biol Chem 1983. [DOI: 10.1016/s0021-9258(17)44667-9] [Citation(s) in RCA: 178] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Reddy PV, Schmid PC, Natarajan V, Schmid HH. The role of cardiolipin as an acyl donor in dog heart N-acylethanolamine phospholipid biosynthesis. Biochim Biophys Acta 1983; 751:241-6. [PMID: 6830842 DOI: 10.1016/0005-2760(83)90178-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
N-Acylethanolamine phospholipids were produced from endogenous substrates with dog heart mitochondrial and microsomal preparations. With mitochondria the N-acyl group contained 13.8% linoleate, with microsomes only 3.6%. Cardiolipin comprised 18.5% of mitochondrial and 3.3% of microsomal lipid P and contained 93.7 and 72.4% linoleic acid, respectively. Incubation of dog heart subcellular fractions with [1-14C]linoleoyl cardiolipin in the presence of Ca2+ resulted in the formation of N-acylethanolamine phospholipids labeled primarily in the N-acyl and 1-O-acyl moieties. The data indicate that cardiolipin is the major source of linoleic acid used in the N-acylation of ethanolamine phospholipids by transacylase activity.
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Reddy PV, Natarajan V, Schmid PC, Schmid HH. N-Acylation of dog heart ethanolamine phospholipids by transacylase activity. Biochim Biophys Acta 1983; 750:472-80. [PMID: 6824721 DOI: 10.1016/0005-2760(83)90187-x] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Radioactive N-acylethanolamine phospholipids were produced in dog heart homogenates incubated with acyl-labeled phosphatidylcholine in the presence of 5 mM Ca2+ and Triton X-100. 70-80% of the label in the N-acylethanolamine phospholipids was recovered in the N-acyl groups and most of the remainder was in the 1-O-acyl groups. Incubations with 1,2-dipalmitoylPC and 1-palmitoyl-2-linoleoylPC labeled in either the 1-O-acyl or 2-O-acyl moiety showed the predominant utilization of the acyl groups at the sn-1 position, indicating transacylation by phospholipase A1 (or lysophospholipase) activity. It is suggested that intramolecular transacylation from 1-O-acyl to N-acyl groups of phosphatidylethanolamine also occurred to some extent, thus providing a free primary hydroxy group as an additional acyl acceptor for the transacylation reaction.
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