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Batra A, Câmara HB, Joaquim FR, Srivastava R, Valle JWF. Axion Paradigm with Color-Mediated Neutrino Masses. Phys Rev Lett 2024; 132:051801. [PMID: 38364158 DOI: 10.1103/physrevlett.132.051801] [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] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/17/2023] [Accepted: 01/02/2024] [Indexed: 02/18/2024]
Abstract
We propose a generalized Kim-Shifman-Vainshtein-Zakharov-type axion framework in which colored fermions and scalars act as two-loop Majorana neutrino-mass mediators. The global Peccei-Quinn symmetry under which exotic fermions are charged solves the strong CP problem. Within our general proposal, various setups can be distinguished by probing the axion-to-photon coupling at helioscopes and haloscopes. We also comment on axion dark-matter production in the early Universe.
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Affiliation(s)
- A Batra
- Departamento de Física and CFTP, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - H B Câmara
- Departamento de Física and CFTP, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - F R Joaquim
- Departamento de Física and CFTP, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - R Srivastava
- Department of Physics, Indian Institute of Science Education and Research-Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, India
| | - J W F Valle
- AHEP Group, Institut de Física Corpuscular-CSIC/Universitat de València, Parc Científic de Paterna. C/ Catedrático José Beltrán, 2 E-46980 Paterna (Valencia), Spain
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Wazir SS, Srivastava R. Pentoxifylline - A Novel Adjunct in the Management of Patients with Oral Submucous Fibrosis in Terai Population of Nepal: A Prospective Case Control Study. Mymensingh Med J 2022; 31:1170-1178. [PMID: 36189568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Oral submucous fibrosis is a premalignant condition largely seen in the South-Asian countries mainly due to the consumption of areca nut. Pentoxifylline is a methylxanthine derivative, with vasodilating, anti-inflammatory and immune modulatory properties and is believed to increase the vascularity of the mucosal layer. The study was conducted to clinically assess the effectiveness of orally given pentoxifylline with dexamethasone (4mg/ml) given intralesionally and hyaluronidase 1500 IU with 0.5ml of 2.0% lignocaine plus multivitamins in the management of Oral submucous fibrosis patients pertaining to the Terai belt of Nepal. This study was conducted as an experimental study consisting of 70 oral submucous fibrosis patients who were divided blindly into two groups i.e. control or standard drug group (n=35) and experimental drug group (n=35). Standard drug group were given biweekly intralesional injections of dexamethasone (4mg/ml) and hyaluronidase 1500IU with 0.5ml of 2.0% lignocaine plus one capsule of multivitamins daily for a period of 12 weeks whereas experimental drug group were given pentoxifylline tablets 400mg 3 times daily for 12 weeks in addition to the drugs given to the standard drug group. Variables considered in the study were burning sensation, mouth opening, tongue protrusion and cheek flexibility using visual analog scale, vernier caliper, cheek retractor and a metric scale. On comparing, statistically significant results were seen in experimental drug group as far as reduction in burning sensation (p<0.001) and increase in mouth opening (p<0.001) was concerned. As far as improvement in tongue protrusion and cheek flexibility were concerned, the results were appreciating but statistically not significant (p=0.231) and (p=0.251) respectively. This study showed the effectiveness of pentoxifylline as an adjunct in the routine management of oral submucous fibrosis.
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Affiliation(s)
- S S Wazir
- Dr Sartaj Singh Wazir, Associate Professor, Department of Oral Medicine and Radiology, M B Kedia Dental College Pvt. Ltd. Birgunj, Nepal; E-mail:
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Srivastava R, Mailo J, Dunbar M. Perinatal Stroke in Fetuses, Preterm and Term Infants. Semin Pediatr Neurol 2022; 43:100988. [PMID: 36344024 DOI: 10.1016/j.spen.2022.100988] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 07/06/2022] [Accepted: 07/29/2022] [Indexed: 12/14/2022]
Abstract
Perinatal stroke is a well-defined heterogenous group of disorders involving a focal disruption of cerebral blood flow between 20 weeks gestation and 28 days of postnatal life. The most focused lifetime risk for stroke occurs during the first week after birth. The morbidity of perinatal stroke is high, as it is the most common cause of hemiparetic cerebral palsy which results in lifelong disability that becomes more apparent throughout childhood. Perinatal strokes can be classified by the timing of diagnosis (acute or retrospective), vessel involved (arterial or venous), and underlying cause (hemorrhagic or ischemic). Perinatal stroke has primarily been reported as a disorder of term infants; however, the preterm brain possesses different vulnerabilities that predispose an infant to stroke injury both in utero and after birth. Accurate diagnosis of perinatal stroke syndromes has important implications for investigations, management, and prognosis. The classification of perinatal stroke by age at presentation (fetal, preterm neonatal, term neonatal, and infancy/childhood) is summarized in this review, and includes detailed descriptions of risk factors, diagnosis, treatment, outcomes, controversies, and resources for family support.
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Affiliation(s)
- R Srivastava
- Division of Pediatric Neurology, Department of Pediatrics, University of Albertam, AB, Canada
| | - J Mailo
- Division of Pediatric Neurology, Department of Pediatrics, University of Albertam, AB, Canada
| | - M Dunbar
- Department of Pediatrics, University of Calgary, Calgary, AB, Canada; Department of Community Health Sciences, University of Calgary, AB, Canada; Alberta Children's Hospital Research Institute (ACHRI), Calgary, AB, Canada; Hotchkiss Brain Institute, Calgary, AB, Canada.
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Chadha VK, Praseeja P, Srivastava R, Shivashankar BA, Hemanth Kumar NK, Padmesha R, Suganthi P, Umadevi G, Narayana L, Magesh V, Nagendra N, Puttaswamy G, Jaiswal R, Somashekar N. Pre-treatment delay and out of pocket expenses by notified new tuberculosis patients in an Indian mega city. Indian J Tuberc 2022; 69:446-452. [PMID: 36460374 DOI: 10.1016/j.ijtb.2021.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/21/2021] [Accepted: 07/01/2021] [Indexed: 06/17/2023]
Abstract
BACKGROUND Study was carried out to find out delay from onset of symptoms and out of pocket expenditure (OOPE) until initiation of anti-TB treatment (ATT) by new Tuberculosis (TB) patients registered in public health facilities in Bengaluru. METHODS Notified patients (N = 228) selected purposively were interviewed at initiation of ATT regarding number and type of facilities visited and delay in initiating ATT. OOPE was elicited separately for in- and out-patient visits, towards consultation, purchase of medicines, diagnostic tests, transportation, hospitalization and food. Dissaving or money borrowed was ascertained. RESULTS Two-thirds of participants were 15-44 years of age and 56% were males, mean annual household income was $4357. About 75% first visited a private health facility; 68% and 87% respectively were diagnosed and started on ATT in public sector after visiting an average of three facilities and after a mean delay of 68 days; the median delay was 44 days. Of mean OOPE of $402, 54% was direct medical expenditure, 5% non-medical direct and 41% indirect. OOPE was higher for Extra-pulmonary TB compared to PTB and when number of health facilities visited before initiating treatment was >3 compared to those who visited ≤3 and when the time interval between onset of symptoms and treatment initiation (total delay) was >28 days compared to when this interval was ≤28 days. About 20% suffered catastrophic expenditure; 34% borrowed money and 37% sold assets. CONCLUSION Concerted efforts are needed to reduce delay and OOPE in pre-treatment period and social protection to account for indirect expenditure.
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Affiliation(s)
- V K Chadha
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India.
| | - P Praseeja
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India; Data Processing Center, National Statistical Office, Ministry of Statistics and Program Implementation, Bengaluru, India
| | - R Srivastava
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India
| | - B A Shivashankar
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India
| | - N K Hemanth Kumar
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India
| | - R Padmesha
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India
| | - P Suganthi
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India
| | - G Umadevi
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India
| | - Lakshmi Narayana
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India
| | - V Magesh
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India
| | - N Nagendra
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India
| | - G Puttaswamy
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India
| | - R Jaiswal
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India; National Pharmaceutical Pricing Authority, Ministry of Chemical and Fertilizers, New Delhi, India
| | - N Somashekar
- National Tuberculosis Institute, Ministry of Health and Family Welfare, Bengaluru, India
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Srivastava R, Khan J, Muzaffar S, Guroji P, Athar M. LB1034 Chromatin remodeling by warfare arsenicals in porcine skin. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.1072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Sigley A, Ng H, Chouhan H, Suhardja T, Srivastava R, Wagner I. Impact of a comprehensive geriatric assessment on post-operative outcomes for older adults presenting for colorectal cancer surgery: A retrospective cross-sectional cohort study. J Geriatr Oncol 2021. [DOI: 10.1016/s1879-4068(21)00428-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kumar D, Kushwaha NS, Tiwari PG, Sharma Y, Srivastava R, Sharma V. Outcome of acetabulum fractures treated with open reduction and internal fixation through Kocher-Langenbeck Approach: A retrospective study. J Clin Orthop Trauma 2021; 23:101599. [PMID: 34692404 PMCID: PMC8517211 DOI: 10.1016/j.jcot.2021.101599] [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: 09/09/2021] [Revised: 09/12/2021] [Accepted: 09/12/2021] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Complex anatomy of acetabular fracture is quite challenging for the orthopedic surgeons. Many Acetabular fracture fixation approaches have been used for a long time to treat different fracture patterns of acetabulum. Kocher-Langenbeck Approach (K-L approach) of acetabulum fracture is usually used by most of orthopedic surgeons. In this retrospective study, we evaluated the clinical and functional outcome of subtypes of acetabulum fractures treated with K-L approach. Assessment of Intra and postoperative complications of subtypes of acetabulum fractures was also done. METHOD Eighty patients (48 men and 32 women) were included in this retrospective study with a mean follow-up period of 2.6 years. Fractures were classified according to Letournal and Judet classification. K-L approach was performed in all these patients. Post operative reduction, Radiological outcome was quantified using Matta's criteria while the functional outcome was assessed according to Merle d'Aubigné and Postel scoring system. Postoperative complications were evaluated. RESULTS The mean age of a total of 80 cases was 43.64 ± 13.24 year. The type of fracture was found to be significantly associated with concentric/non-concentric reduction (p = 0.003) and with post op reduction (p = 0.005). The post operative reduction was found to be significantly associated with radiological (p < 0.001) and functional outcome (p < 0.001) at one year post op. The type of fracture was found to be significantly associated with radiological outcome (p < 0.001) while non-significantly found to be associated with functional outcome at 1 year (p = 0.050). The type of fracture was found to be significantly associated with post op complications (p = 0.003) and with arthritis (p = 0.001). CONCLUSION K-L approach is a multifaceted and convenient approach for treating acetabulum fractures. Type of fracture and post-operative reduction are key factors for a satisfactory outcome. Transverse with posterior wall fracture has the worst prognosis.
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Affiliation(s)
- Dharmendra Kumar
- Department of Orthopaedic Surgery, King George's Medical University, Lucknow, U.P, India
| | | | - Prakash Gaurav Tiwari
- Department of Orthopaedic Surgery, King George's Medical University, Lucknow, U.P, India
| | - Yashvardhan Sharma
- Department of Orthopaedic Surgery, King George's Medical University, Lucknow, U.P, India
| | - R.N. Srivastava
- Department of Orthopaedic Surgery, King George's Medical University, Lucknow, U.P, India
| | - Vineet Sharma
- Department of Orthopaedic Surgery, King George's Medical University, Lucknow, U.P, India
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Holden P, Wilson G, Daniel M, Srivastava R. 1251 Risk Stratification in the Management of Post-Tonsillectomy Haemorrhage. Br J Surg 2021. [DOI: 10.1093/bjs/znab259.563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Aim
Tonsillectomy represents 17% of the elective workload in ENT and post-tonsillectomy haemorrhage is the most significant complication of this procedure. Accordingly, the GIRFT (Getting It Right First Time) report for ENT surgery focusses on the prevention of post-tonsillectomy bleeding. However, there is little guidance on the management of post-tonsillectomy haemorrhage. A local guideline for the management of post-tonsillectomy haemorrhage was introduced in 2020 based on expert consensus. This audit examines the management of patients readmitted with post-tonsillectomy haemorrhage in 2019 and compares this to the management suggested in the new guideline.
Method
Patients readmitted with post-tonsillectomy haemorrhage within 30 days of a tonsillectomy performed in 2019 were identified. These were retrospectively stratified into risk categories according to both patient and clinical factors. Management was audited against the new guideline including both the initial patient assessment and the treatment suggested for their respective risk category.
Results
Fifteen patients were identified and stratified into low, medium and high-risk categories. All patients in the “low risk” category were successfully treated conservatively. One patient from the “medium risk” category had a further bleed as an inpatient during the proposed period of observation in the new guideline and was thereafter treated as “high risk”. Within the “high risk” category two patients required return to theatre for arrest of post-tonsillectomy haemorrhage.
Conclusions
These results show that the risk stratification proposed in these guidelines may be useful in the management of post-tonsillectomy haemorrhage. Amendments to the guideline and a re-audit are in progress.
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Affiliation(s)
- P Holden
- Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - G Wilson
- Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - M Daniel
- Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - R Srivastava
- Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
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Chan WH, Srivastava R, Damaraju N, Do H, Burnett G, MacFarlane J, Xie SM, Chen JK, Honari G, Sarin KY. Automated detection of skin reactions in epicutaneous patch testing using machine learning. Br J Dermatol 2021; 185:456-458. [PMID: 33829497 DOI: 10.1111/bjd.20141] [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] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 04/04/2021] [Accepted: 04/06/2021] [Indexed: 11/29/2022]
Affiliation(s)
- W H Chan
- Dermatology, Stanford University School of Medicine, Stanford, CA, USA.,Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - R Srivastava
- Dermatology, Stanford University School of Medicine, Stanford, CA, USA
| | - N Damaraju
- Biomedical Informatics, Stanford University School of Medicine, Stanford, CA, USA
| | - H Do
- Dermatology, Stanford University School of Medicine, Stanford, CA, USA
| | - G Burnett
- Biomedical Informatics, Stanford University School of Medicine, Stanford, CA, USA
| | - J MacFarlane
- Biomedical Informatics, Stanford University School of Medicine, Stanford, CA, USA
| | - S M Xie
- Computer Science, Stanford University School of Medicine, Stanford, CA, USA
| | - J K Chen
- Dermatology, Stanford University School of Medicine, Stanford, CA, USA
| | - G Honari
- Dermatology, Stanford University School of Medicine, Stanford, CA, USA
| | - K Y Sarin
- Dermatology, Stanford University School of Medicine, Stanford, CA, USA
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Balaramnavar VM, Srivastava R, Varshney S, Kumar S, Rawat AK, Chandasana H, Chhonker YS, Bhatta RS, Srivastava AK, Gaikwad AN, Lakshmi V, Saxena AK. Synthesis, biological evaluation, and molecular docking study of some new rohitukine analogs as protein tyrosine phosphatase 1B inhibitors. Bioorg Chem 2021; 110:104829. [PMID: 33773222 DOI: 10.1016/j.bioorg.2021.104829] [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] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 03/09/2021] [Accepted: 03/11/2021] [Indexed: 02/06/2023]
Abstract
Rohitukine (RH) was extracted from the stem bark of Dysoxylum binectariferum Hook. It was derivatized to different arylsulphanmides by treating with the corresponding aryl sulphonyl chlorides. These derivatives were tested in-vitro on protein tyrosine phosphatase 1B (PTP1B) inhibition. Among these the active compounds K2, K3, K5, and K8 significantly inhibited the PTP1B by 51.3%, 65.6%, 71.9%, and 55.9% respectively at 10 µg/ml, the results were also supported by in-silico docking experiments. The most potent compound K5 was analyzed for antidiabetic and antidyslipidemic activity in vivo. It showed a marked reduction in blood glucose level (random and fasting) and serum insulin level in db/db mice. It improved glucose intolerance as ascertained by the oral glucose tolerance test (OGTT). These NCEs (New Chemical Entities) also lowered cholesterol and triglyceride profiles while improved high-density lipoprotein cholesterol in db/db mice. The K5 was further evaluated for antiadipogenic activity on MDI (Methylisobutylxanthine, dexamethasone, and insulin)-induced adipogenesis. where it significantly inhibited MDI-induced adipogenesis in 3 T3-L1 preadipocytes, at 10 µM and 20 µM concentration. These results were compared with the parent compound RH which inhibited 35% and 45% lipid accumulation while the RH analog K5 inhibited the lipid accumulation by 41% and 51% at 10 and 20 µM concentration, respectively. These results well corroborated with in-silico studies.
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Affiliation(s)
- V M Balaramnavar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Jankipuram, Extention Sector 10, Sitapur Road, Lucknow 226031, UP, India; Global Institute of Pharmaceutical Education and Research, Jaspur Road, Kashipur, Uttarakhand, India
| | - R Srivastava
- Department of Biochemistry, CSIR-Central Drug Research Institute, Jankipuram Extention, Sector 10, Sitapur Road, Lucknow 226031, UP, India
| | - S Varshney
- Department of Pharmacology, CSIR-Central Drug Research Institute, Jankipuram Extention Sector 10, Sitapur Road, Lucknow 226031, UP, India
| | - S Kumar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Jankipuram, Extention Sector 10, Sitapur Road, Lucknow 226031, UP, India
| | - A K Rawat
- Department of Biochemistry, CSIR-Central Drug Research Institute, Jankipuram Extention, Sector 10, Sitapur Road, Lucknow 226031, UP, India
| | - H Chandasana
- Pharmacokinetics and Metabolism Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - Y S Chhonker
- Pharmacokinetics and Metabolism Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - R S Bhatta
- Pharmacokinetics and Metabolism Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - A K Srivastava
- Department of Biochemistry, CSIR-Central Drug Research Institute, Jankipuram Extention, Sector 10, Sitapur Road, Lucknow 226031, UP, India
| | - A N Gaikwad
- Department of Pharmacology, CSIR-Central Drug Research Institute, Jankipuram Extention Sector 10, Sitapur Road, Lucknow 226031, UP, India
| | - V Lakshmi
- Department of Biochemistry, King George's Medical University, Lucknow 226003, UP, India
| | - A K Saxena
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Jankipuram, Extention Sector 10, Sitapur Road, Lucknow 226031, UP, India.
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Poojari R, Mohanty B, Kadwad V, Suryawanshi D, Chaudhari P, Khade B, Srivastava R, Gupta S, Panda D. A comprehensive analysis of cetuximab combinatorial polymeric nanocomplexes with potent radionuclide uptake to combat metastatic liver cancer. Eur J Cancer 2020. [DOI: 10.1016/s0959-8049(20)31173-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Nichols L, Knighton A, Brunisholz K, Elbel R, Smith G, Choberka A, Belnap T, Allen T, Moore M, Srivastava R. Adapting a Complex, Integrated Health and Social Services Intervention in Two Communities. Health Serv Res 2020. [DOI: 10.1111/1475-6773.13489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
- L. Nichols
- Intermountain Healthcare Salt Lake City UT United States
| | - A. Knighton
- Intermountain Healthcare Murray UT United States
| | | | - R. Elbel
- SelectHealth Murray UT United States
| | - G. Smith
- Intermountain Healthcare Salt Lake City UT United States
| | - A. Choberka
- Intermountain Healthcare Ogden UT United States
| | - T. Belnap
- Intermountain Healthcare Murray UT United States
| | - T. Allen
- Intermountain Healthcare Salt Lake City UT United States
| | - M. Moore
- Intermountain Healthcare Salt Lake City UT United States
| | - R. Srivastava
- Intermountain Healthcare Salt Lake City UT United States
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Rawat SS, Kumar A, Srivastava R, Suman CK. Efficiency Enhancement in Organic Solar Cells by Use of Cobalt Phthalocyanine (CoPc) Thin Films. J Nanosci Nanotechnol 2020; 20:3703-3709. [PMID: 31748067 DOI: 10.1166/jnn.2020.17517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cobalt phthalocyanine (CoPc) nano thin films have been introduced as a hole buffer layer in organic solar cells with active layer of Poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). The surface morphology and opto-electrical properties of the CoPc thin films have made it an applicable materials for organic solar cells. The nano-thin films of CoPc are continuously distributed over the studied area and the roughness are around 5 to 7 nm for all thickness. The dominant optical absorptions are in the visible range of wavelengths 500 to 800 nm. The CoPc buffer layer is suitable for energy level matching in energy level diagram and enhances the absorption spectrum as well, which facilitate the charge carrier generation, increases charge transport, decreases charge recombination, hence enhance the all device parameters short circuit current density (Jsc), open circuit voltage (Voc) and fill factor (FF). The solar cells efficiency increases by ˜70% and the fill factor increases by ˜45% in comparison to the standard cells. The increase in efficiency and the fill factors of the solar cells may also be attributed to the increasing of shunt and lowering the series resistance of the cells. The cole-cole plots of the devices may be modeled in electrical circuit as a single parallel resistance Rb and capacitance Cb network with a series resistance Rc.
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Affiliation(s)
- S S Rawat
- Council of Scientific and Industrial Research-National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi 110012, India
| | - Ashish Kumar
- Council of Scientific and Industrial Research-National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi 110012, India
| | - R Srivastava
- Council of Scientific and Industrial Research-National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi 110012, India
| | - C K Suman
- Council of Scientific and Industrial Research-National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi 110012, India
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Rawat SS, Rana A, Swami SK, Srivastava R, Suman CK. Investigation of negative magneto-conductance properties of cobalt phthalocyanine thin films. SN Appl Sci 2020. [DOI: 10.1007/s42452-020-2405-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Sonika U, Sahu B, Dahale AS, Srivastava R, Saran RK, Sachdeva S. Gastrointestinal: Radiation proctitis: Or is it something else? J Gastroenterol Hepatol 2019; 34:1131. [PMID: 30693563 DOI: 10.1111/jgh.14592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/16/2018] [Accepted: 12/28/2018] [Indexed: 12/09/2022]
Affiliation(s)
- U Sonika
- Department of Gastroenterology, GB Pant Institute of Post Graduate Medical Education and Research, New Delhi, India
| | - B Sahu
- Department of Gastroenterology, GB Pant Institute of Post Graduate Medical Education and Research, New Delhi, India
| | - A S Dahale
- Department of Gastroenterology, GB Pant Institute of Post Graduate Medical Education and Research, New Delhi, India
| | - R Srivastava
- Department of Pathology, GB Pant Institute of Post Graduate Medical Education and Research, New Delhi, India
| | - R K Saran
- Department of Pathology, GB Pant Institute of Post Graduate Medical Education and Research, New Delhi, India
| | - S Sachdeva
- Department of Gastroenterology, GB Pant Institute of Post Graduate Medical Education and Research, New Delhi, India
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Srivastava R, Srivastava S, Sharma A, Raj S. Osteoarthritis knee and quality of life: correlation of articular cartilage volume with individual domain of rand 36 item short form health survey questionnaire. Osteoarthritis Cartilage 2019. [DOI: 10.1016/j.joca.2019.02.596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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Ramarajan N, Srivastava R, Begum F, Gupta S, Pramesh C, Badwe R. Abstract P3-16-01: Responding at patient's time of need: Scaling rapid access to evidence-based treatment plans. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p3-16-01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Cancer patients worldwide feel intense anxiety, often racing to start treatments at non expert centers. Further, imbalanced oncologist to patient ratios (˜1600: 1.8 M in India, ˜23,000: 15M in USA), impedes access to expertise. We study the impact of rapid evidence based expert treatment plans in relieving patient anxiety. Navya, a health services technology, generates personalized treatment plans that maps within NCCN Resource Stratified Guidelines [SABCS 2017]. This is vetted on mobile by oncologists at tertiary centers like TMC NCG to provide expert opinion reports to patients. Since 2015, ˜19,457 patients from 57 countries have reached out for an online opinion. On the ground, 78% of patients received evidence based treatments recommended by Navya [ASCO 2017].
Methods: To assess impact of timeliness, a prospective series of patients (from Sep '17 to April '18) were asked: “Were you relieved to receive expert opinion report in [x] days?” “Does it matter to you to receive expert opinion report in 1 day?” To assess time savings, preliminary reports with treatment options from NCCN and TMC NCG guidelines were shared with patients who matched all guidelines criteria. Subsequently, expert opinion reports were shared as usual.
Results: 543/701 patients responded to phone follow-up. 97% [± 3.2] were relieved to receive expert opinion reports in 1-2 days (103/106) vs 83% [± 3.8 ] for 3+ days (365/437). Of those not relieved by 3+ day turnaround, 83% stated that it would matter to receive expert opinion reports in 1 day (60/72). The first 300 preliminary reports shared in median time of 3.37 hours, resulted in 90% time savings vs expert opinion reports. On 10% of the preliminary reports, experts added information such as de-/escalating therapy (18/31), and additional diagnostic tests (6/31).
Conclusions: Navya relieves patient anxieties by responding at the time of need with evidence based treatment plans. Scaling such health services technologies to patients worldwide is feasible.
Citation Format: Ramarajan N, Srivastava R, Begum F, Gupta S, Pramesh C, Badwe R. Responding at patient's time of need: Scaling rapid access to evidence-based treatment plans [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P3-16-01.
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Affiliation(s)
- N Ramarajan
- Navya Network, Cambridge, MA; Breast Disease Management Group, Tata Memorial Centre, Mumbai, India; Tata Memorial Centre, Mumbai, India
| | - R Srivastava
- Navya Network, Cambridge, MA; Breast Disease Management Group, Tata Memorial Centre, Mumbai, India; Tata Memorial Centre, Mumbai, India
| | - F Begum
- Navya Network, Cambridge, MA; Breast Disease Management Group, Tata Memorial Centre, Mumbai, India; Tata Memorial Centre, Mumbai, India
| | - S Gupta
- Navya Network, Cambridge, MA; Breast Disease Management Group, Tata Memorial Centre, Mumbai, India; Tata Memorial Centre, Mumbai, India
| | - C Pramesh
- Navya Network, Cambridge, MA; Breast Disease Management Group, Tata Memorial Centre, Mumbai, India; Tata Memorial Centre, Mumbai, India
| | - R Badwe
- Navya Network, Cambridge, MA; Breast Disease Management Group, Tata Memorial Centre, Mumbai, India; Tata Memorial Centre, Mumbai, India
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Round WH, Ng KH, Rodriguez L, Thayalan K, Tang F, Srivastava R, Fukuda S, Krisanachinda A, Deng X, Han Y. AFOMP policy number 6: code of ethics for medical physicists in AFOMP Countries. Australas Phys Eng Sci Med 2018; 41:809-810. [PMID: 30406922 DOI: 10.1007/s13246-018-0708-x] [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: 07/26/2018] [Accepted: 10/31/2018] [Indexed: 10/27/2022]
Abstract
This policy statement, which is the sixth of a series of documents prepared by the Asia-Oceania Federation of Organizations for Medical Physics (AFOMP) Professional Development Committee, gives guidance on how medical physicists in AFOMP countries should conduct themselves in an ethical manner in their professional practice (Ng et al. in Australas Phys Eng Sci Med 32:175-179, 2009; Round et al. in Australas Phys Eng Sci Med 33:7-10, 2010; Round et al. in Australas Phys Eng Sci Med 34:303-307, 2011; Round et al. in Australas Phys Eng Sci Med 35:393-398, 2012; Round et al. in Australas Phys Eng Sci Med 38:217-221, 2015). It was developed after the ethics policies and codes of conducts of several medical physics societies and other professional organisations were studied. The policy was adopted at the Annual General Meeting of AFOMP held in Jaipur, India, in November 2017.
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Affiliation(s)
- W H Round
- , 100 Te Awa Road, R D 3, 3283, Hamilton, New Zealand.
| | - K H Ng
- Department of Biomedical Imaging, University of Malaya, Kuala Lumpur, Malaysia
| | - L Rodriguez
- Jose R. Reyes Memorial Medical Center, Manila, Philippines
| | - K Thayalan
- Medical Physics Division, Dr Kamashi Memorial Hospital, Chennai, India
| | - F Tang
- Department of Clinical Oncology, Queen Mary Hospital, Hong Kong, Hong Kong
| | - R Srivastava
- Department of Radiation Oncology, Ghent University Hospital, C. Heymanslaan 10, Radiotherapiepark, 9000, Ghent, Belgium
| | - S Fukuda
- Radiation Quality Control Section, Clinical Research Cluster, National Institute of Radiological Sciences (NIRS), National Institutes for Quantum and Radiological Science and Technology (QST), Chiba, Japan
| | - A Krisanachinda
- Department of Radiology, Chulalongkorn University, Bangkok, Thailand
| | - X Deng
- Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Y Han
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
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Lavanya SN, Udayashankar AC, Raj SN, Mohan CD, Gupta VK, Tarasatyavati C, Srivastava R, Nayaka SC. Lipopolysaccharide-induced priming enhances NO-mediated activation of defense responses in pearl millet challenged with Sclerospora graminicola. 3 Biotech 2018; 8:475. [PMID: 30456009 PMCID: PMC6226417 DOI: 10.1007/s13205-018-1501-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 11/01/2018] [Indexed: 01/13/2023] Open
Abstract
Lipopolysaccharide (LPS) elicitors isolated from Pseudomonas fluorescens UOM SAR 14 effectively induced systemic and durable resistance against pearl millet downy mildew disease caused by the oomycete Sclerospora graminicola. Rapid and increased callose deposition and H2O2 accumulation were evidenced in downy mildew susceptible seeds pre-treated with LPS (SLPS) in comparison with the control seedlings, which also correlated with expression of various other defense responses. Biochemical analysis of enzymes and quantitative real-time polymerase chain reaction data suggested that LPS protects pearl millet against downy mildew through the activation of plant defense mechanisms such as generation of nitric oxide (NO), increased expression, and activities of defense enzymes and proteins. Elevation of NO concentrations was shown to be essential for LPS-mediated defense manifestation in pearl millet and had an impact on the other downstream defense responses like enhanced activation of enzymes and pathogen-related (PR) proteins. Temporal expression analysis of defense enzymes and PR-proteins in SLPS seedlings challenged with the downy mildew pathogen revealed that the activity and expression of peroxidase, phenylalanine ammonia lyase, and the PR-proteins (PR-1 and PR-5) were significantly enhanced compared to untreated control. Higher gene expression and protein activities of hydroxyproline-rich glycoproteins (HRGPs) were observed in SLPS seedlings which were similar to that of the resistant check. Collectively, our results suggest that, in pearl millet-downy mildew interaction, LPS pre-treatment affects defense signaling through the central regulator NO which triggers the activities of PAL, POX, PR-1, PR-5, and HRGPs.
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Affiliation(s)
- S. N. Lavanya
- Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysore, 570006 India
| | - A. C. Udayashankar
- Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysore, 570006 India
| | - S. Niranjan Raj
- Department of Studies in Microbiology, Karnataka State Open University, Mukthagangotri, Mysore, 570006 India
| | | | - V. K. Gupta
- ERA Chair of Green Chemistry, Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - C. Tarasatyavati
- All India Coordinated Research Project on Pearl Millet, Indian Council of Agricultural Research, Mandor, Jodhpur, Rajasthan 342304 India
| | - R. Srivastava
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Telangana 502324 India
| | - S. Chandra Nayaka
- Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysore, 570006 India
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Tan C, Yeo Chen Long D, Cao T, Tan Wei Ding V, Srivastava R, Yow A, Tan W, Wong Wing Kee D, Xu C, Tey H. Drug-free microneedles in the treatment of keloids: a single-blinded intraindividual controlled clinical trial. Br J Dermatol 2018; 179:1418-1419. [DOI: 10.1111/bjd.17078] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C. Tan
- National Skin Centre; 1 Mandalay Rd Singapore 308205
| | - D. Yeo Chen Long
- School of Chemical and Biomedical Engineering; Nanyang Technological University; 62 Nanyang Drive Singapore 637459
| | - T. Cao
- National Skin Centre; 1 Mandalay Rd Singapore 308205
| | | | - R. Srivastava
- Institute of Infocomm, Agency of Science and Technology; Singapore
| | - A.P. Yow
- Institute of Infocomm, Agency of Science and Technology; Singapore
| | - W.P. Tan
- National Skin Centre; 1 Mandalay Rd Singapore 308205
| | - D. Wong Wing Kee
- Institute of Infocomm, Agency of Science and Technology; Singapore
| | - C. Xu
- School of Chemical and Biomedical Engineering; Nanyang Technological University; 62 Nanyang Drive Singapore 637459
- NTU-Northwestern Institute for Nanomedicine; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798
| | - H.L. Tey
- National Skin Centre; 1 Mandalay Rd Singapore 308205
- Lee Kong Chian School of Medicine; Nanyang Technological University; Singapore
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21
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Wilson M, Kore R, Ritchie A, Fraser R, Beaumont S, Srivastava R, Badyal J. Palladium–poly(ionic liquid) membranes for permselective sonochemical flow catalysis. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.02.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Srivastava R. Skeletal circulation in clinical practice. Indian J Med Res 2017. [PMCID: PMC5861482 DOI: 10.4103/0971-5916.226668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- R.N. Srivastava
- Department of Orthopaedic Surgery, King Georges’ Medical University Lucknow 226 003, Uttar Pradesh, India
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23
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Ranawat R, Srivastava R. Risk of cardiovascular diseases and gastrointestinal tract disorders in relation to the impact of shift work among male workers of textile mills in Pali district of Rajasthan, India. ACTA ACUST UNITED AC 2017. [DOI: 10.31018/jans.v9i3.1362] [Citation(s) in RCA: 2] [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: 11/08/2022]
Abstract
he present study was conducted in textile mill of Pali city with the objective to study the risk of cardiac and gastric problems in relation to shift work among male workers. The results showed significant difference between Body Mass Index (χ2=14.2, p=0.0008) and waist hip ratio (χ2=5.2, p=0.0226) of shift and non shift workers. Results on food intake showed comparatively more deficient daily intake of nutrients like fiber (7.21 g), β carotene (1842.89 μg), and folic acid (99.03 μg) in shift workers with respect to recommended dietary allowances and an overconsumption of fats (37.72 g). Alcoholism (χ2=17.3, p=0.0001) and smoking habit (χ2=14, p=0.0029) was found to be significantly higher among shift workers. Comparatively higher segment of shift workers suffered from hypertension (56.0%), disturbed appetite (87.50%), stomach upsets (90.0%), nausea (88.50%), heartburn (85.0%) and breathlessness (34.0%). Shift workers also had higher mean levels of lipid profile fractions and relatively more subjects fell into the category of high risk (20.50%) of CVD. Longer duration of involvement in shift work also influenced the occurrence of gastric and cardiac problems like disturbed appetite (χ2=9.96, p=0.0411), stomach upsets (χ2=9.73, p=0.0452), stomach ache (χ2=10.1, p=0.0389), constipation (χ2=9.88, p=0.0424), dizziness (47.37%), breathlessness (50.0%) and swollen feet (44.74%). The study concludes that shift work affects food intake, BMI, WHR, BP, alcohol intake, smoking habits and lipid profile of the subjects, thus increasing the risk of health problems like cardiovascular and gastric diseases.
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24
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Lalwani R, Srivastava R, Athavale S, Kotgirwar S. Anterior cruciate ligament: Morphology and morphometry of its footprints and fibre bundles. J ANAT SOC INDIA 2017. [DOI: 10.1016/j.jasi.2017.08.166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Arunkumar P, Indulekha S, Vijayalakshmi S, Srivastava R. In vitro comparative studies of Zein nanoparticles and composite Chitosan thermogels based injectable formulation of Doxorubicin. J Drug Deliv Sci Technol 2017. [DOI: 10.1016/j.jddst.2017.05.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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26
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Srivastava R, Bousquières J, Cepeda-Vázquez M, Roux S, Bonazzi C, Rega B. Kinetic study of furan and furfural generation during baking of cake models. Food Chem 2017; 267:329-336. [PMID: 29934175 DOI: 10.1016/j.foodchem.2017.06.126] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 05/25/2017] [Accepted: 06/20/2017] [Indexed: 01/20/2023]
Abstract
This study describes the kinetics of furan and furfural generation in a cake model, for the first time. These process-induced compounds impact safety and sensory aspects of baked products. Understanding their generation with regards to process dynamics will serve food quality design. However, the complexity of real products makes this task challenging. This work provides a novel approach to understand and model chemical reactivity by implementing an inert cake model (starch, water and cellulose), specifically designed for mimicking a sponge cake structure. The addition of reaction precursors (glucose and leucine) to follow Maillard and caramelization reactions, resulted in browning and generated considerable levels of furanic compounds (up to 17.61ng/g for furan and 38.99μg/g for furfural, dry basis). Multiresponse data modeling resulted in a kinetic model which adequately describes experimental concentrations and makes it possible to estimate the degradation of precursors and the behavior of two hypothetic intermediates.
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Affiliation(s)
- R Srivastava
- UMR Ingénierie Procédés Aliments, AgroParisTech, Inra, Université Paris-Saclay, 91300 Massy, France
| | - J Bousquières
- UMR Ingénierie Procédés Aliments, AgroParisTech, Inra, Université Paris-Saclay, 91300 Massy, France
| | - M Cepeda-Vázquez
- UMR Ingénierie Procédés Aliments, AgroParisTech, Inra, Université Paris-Saclay, 91300 Massy, France
| | - S Roux
- UMR Ingénierie Procédés Aliments, AgroParisTech, Inra, Université Paris-Saclay, 91300 Massy, France
| | - C Bonazzi
- UMR Ingénierie Procédés Aliments, AgroParisTech, Inra, Université Paris-Saclay, 91300 Massy, France
| | - B Rega
- UMR Ingénierie Procédés Aliments, AgroParisTech, Inra, Université Paris-Saclay, 91300 Massy, France.
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Srivastava R, Kommu A, Sinha N, Singh JK. Removal of arsenic ions using hexagonal boron nitride and graphene nanosheets: a molecular dynamics study. Molecular Simulation 2017. [DOI: 10.1080/08927022.2017.1321754] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- R. Srivastava
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, India
| | - A. Kommu
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, India
| | - N. Sinha
- Department of Mechnical Engineering, Indian Institute of Technology Kanpur, Kanpur, India
| | - J. K. Singh
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, India
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Agrawal S, Srivastava R, Rahmatpanah F, Madiraju C, BenMohamed L, Agrawal A. Airway epithelial cells enhance the immunogenicity of human myeloid dendritic cells under steady state. Clin Exp Immunol 2017; 189:279-289. [PMID: 28470729 DOI: 10.1111/cei.12983] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/25/2017] [Indexed: 12/16/2022] Open
Abstract
Dendritic cells (DCs) and airway epithelial cells (AECs) are in close proximity, and AECs secrete factors such as retinoic acid which induce tolerance in DCs at homeostasis. However, the question remains as to how DCs in the lung are able to respond to pathogens in the immunosuppressive environment. Using an in vitro human myeloid DC (mDC)-AEC co-culture system, we demonstrate that AECs induced several gene changes in the mDCs cultured with AECs compared to the mDCs not cultured with AECs. Analysis revealed that several chemokine genes were altered. These chemokine genes could serve to attract neutrophils, natural killer (NK) T as well as T helper type 1 (Th1)/Th2 cells to the airways. Genes priming lipid and major histocompatibility complex (MHC) class II antigen presentation were also up-regulated, along with certain anti-microbial protein genes. In addition, the expression and function of pathogen-sensing Toll-like receptors (TLRs) as well as Nod-like receptors (NLRs) and their downstream signalling molecules were up-regulated in mDCs cultured with AECs. Moreover, murine mucosal DCs from the lung expressed significantly higher levels of TLRs and NLRs compared to peripheral DCs from the spleen. These results indicate that AECs prime mDCs to enhance their immunogenicity, which could be one of the mechanisms that compensates for the immunosuppressive mucosal environment.
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Affiliation(s)
- S Agrawal
- Division of Basic and Clinical Immunology, Department of Medicine, Irvine, CA, USA
| | - R Srivastava
- Laboratory of Cellular and Molecular Immunology, Gavin Herbert Eye Institute, Irvine, CA, USA
| | - F Rahmatpanah
- Department of pathology, University of California, Irvine, Irvine, CA, USA
| | - C Madiraju
- Division of Basic and Clinical Immunology, Department of Medicine, Irvine, CA, USA
| | - L BenMohamed
- Laboratory of Cellular and Molecular Immunology, Gavin Herbert Eye Institute, Irvine, CA, USA
| | - A Agrawal
- Division of Basic and Clinical Immunology, Department of Medicine, Irvine, CA, USA
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Wilson M, Kore R, Fraser R, Beaumont S, Srivastava R, Badyal J. Recyclable palladium catalyst cloths for carbon-carbon coupling reactions. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.01.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Indulekha S, Arunkumar P, Bahadur D, Srivastava R. Dual responsive magnetic composite nanogels for thermo-chemotherapy. Colloids Surf B Biointerfaces 2017; 155:304-313. [PMID: 28448900 DOI: 10.1016/j.colsurfb.2017.04.035] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 04/13/2017] [Accepted: 04/17/2017] [Indexed: 01/01/2023]
Abstract
With the onset of hyperthermia and their advantage in increasing vascular perfusion and permeability in the cancer milieu, thermo-responsive polymers have become an attractive candidate for designing therapeutic nano-vehicles for targeted on-demand delivery of bioactive agents. For this purpose, we developed a dual (thermo- and pH-) responsive nanotherapeutic composite system rendering a combinational therapy of hyperthermia mediated drug delivery. This composite system comprises of magnetic chitosan-g-PNVCL (MCP) polymeric nanogels loaded with anticancer drug, Doxorubicin (DOX). The size distribution and the stability of the MCP nanogels have been characterized using DLS and Zeta-potential studies. XRD and TG-DTA confirms the presence of magnetic nanoparticles loaded onto MCP nanogel. ICP-AES analysis was done to determine the amount of iron content in the MCP nanogels. The magnetic property of the MCP nanogels was estimated to be ∼37 emu/g using Vibrating Sample Magnetometer (VSM). The heating ability of MCP nanogels was calculated to be ∼204W/g for the concentration of 2mg/mL using time-dependent Specific Absorption Rate (SAR) method. Magnetic field induced thermo-responsive and pH responsive drug release studies were carried out and it was found that MCP nanogels have a good on-demand drug release properties. The DOX-MCP nanogels were evaluated for its in vitro killing efficacy of breast cancer cells MCF 7 and MDAMB 231 cells with synergistic effects of both hyperthermia and chemotherapy in presence of magnetic field at the concentration of 2mg/mL. Thus, MCP nanogels can be a potential dual modal on-demand hyperthermia mediated drug delivery platform for the breast cancer treatment.
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Affiliation(s)
- S Indulekha
- Department of Biosciences & Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - P Arunkumar
- Centre for Research in Nanotechnology and Science, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - D Bahadur
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - R Srivastava
- Department of Biosciences & Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India.
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Gollapalli K, Ghantasala S, Kumar S, Srivastava R, Rapole S, Sridhar E, Srivastava S, Moiyadi A. P08.43 Understanding the aggressive nature of glioblastoma tumors associated with the subventricular zone. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Neogi SB, Khanna R, Chauhan M, Sharma J, Gupta G, Srivastava R, Prabhakar PK, Khera A, Kumar R, Zodpey S, Paul VK. Inpatient care of small and sick newborns in healthcare facilities. J Perinatol 2016; 36:S18-S23. [PMID: 27924106 PMCID: PMC5144116 DOI: 10.1038/jp.2016.186] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Neonatal units in teaching and non-teaching hospitals both in public and private hospitals have been increasing in number in the country since the sixties. In 1994, a District Newborn Care Programme was introduced as a part of the Child Survival and Safe Motherhood Programme (CSSM) in 26 districts. Inpatient care of small and sick newborns in the public health system got a boost under National Rural Health Mission with the launch of the national programme on facility-based newborn care (FBNC). This has led to a nationwide creation of Newborn Care Corners (NBCC) at every point of child birth, newborn stabilization units (NBSUs) at First Referral Units (FRUs) and special newborn care units (SNCUs) at district hospitals. Guidelines and toolkits for standardized infrastructure, human resources and services at each level have been developed and a system of reporting data on FBNC created. Till March 2015, there were 565 SNCUs, 1904 NBSUs and 14 163 NBCCs operating in the country. There has been considerable progress in operationalizing SNCUs at the district hospitals; however establishing a network of SNCUs, NBSUs and NBCCs as a composite functional unit of newborn care continuum at the district level has lagged behind. NBSUs, the first point of referral for the sick newborn, have not received the desired attention and have remained a weak link in most districts. Other challenges include shortage of physicians, and hospital beds and absence of mechanisms for timely repair of equipment. With admission protocols not being adequately followed and a weak NBSU system, SNCUs are faced with the problem of admission overload and poor quality of care. Applying best practices of care at SNCUs, creating more NBSU linkages and strengthening NBCCs are important steps toward improving quality of FBNC. This can be further improved with regular monitoring and mentoring from experienced pediatricians, and nurses drawn from medical colleges and the private sector. In addition there is a need to further increase such units to address the unmet need of facility-based care.
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Affiliation(s)
- S B Neogi
- Indian Institute of Public Health (Delhi), Public Health Foundation of India, Delhi, India
| | - R Khanna
- Saving Newborn Lives, Save the Children, India
| | - M Chauhan
- Indian Institute of Public Health (Delhi), Public Health Foundation of India, Delhi, India
| | - J Sharma
- Indian Institute of Public Health (Delhi), Public Health Foundation of India, Delhi, India
| | - G Gupta
- UNICEF, Country Office, New Delhi, India
| | - R Srivastava
- Ministry of Health and Family Welfare, Government of India, New Delhi, India
| | - P K Prabhakar
- Ministry of Health and Family Welfare, Government of India, New Delhi, India
| | - A Khera
- Ministry of Health and Family Welfare, Government of India, New Delhi, India
| | - R Kumar
- Ministry of Health and Family Welfare, Government of India, New Delhi, India,Ministry of Health and Family Welfare, Govt of India, Nirman Bhawan, New Delhi 110011, India. E-mail:
| | - S Zodpey
- Indian Institute of Public Health (Delhi), Public Health Foundation of India, Delhi, India
| | - V K Paul
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
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Abstract
About 0.75 million neonates die every year in India, the highest for any country in the world. The neonatal mortality rate (NMR) declined from 52 per 1000 live births in 1990 to 28 per 1000 live births in 2013, but the rate of decline has been slow and lags behind that of infant and under-five child mortality rates. The slower decline has led to increasing contribution of neonatal mortality to infant and under-five mortality. Among neonatal deaths, the rate of decline in early neonatal mortality rate (ENMR) is much lower than that of late NMR. The high level and slow decline in early NMR are also reflected in a high and stagnant perinatal mortality rate. The rate of decline in NMR, and to an extent ENMR, has accelerated with the introduction of National Rural Health Mission in mid-2005. Almost all states have witnessed this phenomenon, but there is still a huge disparity in NMR between and even within the states. The disparity is further compounded by rural-urban, poor-rich and gender differentials. There is an interplay of different demographic, educational, socioeconomic, biological and care-seeking factors, which are responsible for the differentials and the high burden of neonatal mortality. Addressing inequity in India is an important cross-cutting action that will reduce newborn mortality.
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Affiliation(s)
- M J Sankar
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - S B Neogi
- Indian Institute of Public Health (Delhi), Public Health Foundation of India, Delhi, India
| | - J Sharma
- Indian Institute of Public Health (Delhi), Public Health Foundation of India, Delhi, India
| | - M Chauhan
- Indian Institute of Public Health (Delhi), Public Health Foundation of India, Delhi, India
| | - R Srivastava
- Ministry of Health and Family Welfare, Government of India, New Delhi, India
| | - P K Prabhakar
- Ministry of Health and Family Welfare, Government of India, New Delhi, India
| | - A Khera
- Ministry of Health and Family Welfare, Government of India, New Delhi, India
| | - R Kumar
- Ministry of Health and Family Welfare, Government of India, New Delhi, India
| | - S Zodpey
- Indian Institute of Public Health (Delhi), Public Health Foundation of India, Delhi, India
| | - V K Paul
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
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Sylvester D, Srivastava R, Lamplugh A, Allgar V, Snowden C, Bhandari S, England J. Effect on mortality of elective parathyroid surgery in one hundred and three patients with chronic kidney disease: our experience. Clin Otolaryngol 2016; 42:1025-1029. [PMID: 27727518 DOI: 10.1111/coa.12768] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2016] [Indexed: 11/30/2022]
Affiliation(s)
- D Sylvester
- Department of Otolaryngology, Castle Hill Hospital, Cottingham, UK
| | - R Srivastava
- Department of Otolaryngology, Castle Hill Hospital, Cottingham, UK
| | - A Lamplugh
- Department of Renal Medicine, Hull Royal Infirmary, Hull, UK
| | - V Allgar
- Department of Health Sciences, The University of York, Heslington, York, UK
| | - C Snowden
- Department of Anaesthesia, Castle Hill Hospital, Cottingham, UK
| | - S Bhandari
- Department of Renal Medicine, Hull Royal Infirmary, Hull, UK
| | - J England
- Department of Otolaryngology, Castle Hill Hospital, Cottingham, UK
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Ramar M, S. Rawat S, Srivastava R, K. Dhawan S, K. Suman C. Impact Of Cross Linking Chain Of N,N’-bis(napthalen-|-y|)-N,N’-bis(phenyl)-benzidine On Temperature dependent Transport Properties. ACTA ACUST UNITED AC 2016. [DOI: 10.5185/amlett.2016.6305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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38
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Brightwell R, Amobi A, Wooten K, Srivastava R, Odunsi K, Shrikant P. Developing combinatorial approaches for durable cancer treatment. Gynecol Oncol 2016. [DOI: 10.1016/j.ygyno.2016.04.509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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Gupta P, Sinha S, Joshi M, Vats S, Sharma M, Srivastava R, Bhalla S, Mohan V, Tandon N, Unnikrishnan A, Reddy K, Prabhakaran D. PS218 Education Programs for Primary Care Physicians: An Experience From Various Capacity Building Initiatives on Chronic Conditions in India. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Jain D, Mishra A, Sinha S, Gupta P, Srivastava R, Deshpande S, Prabhakaran D, Unnikrishnan A, Bhalla S. PT014 Quality Improvement and Assurance of a Cardio-Diabetes Education Programme: A Pan India Initiative for Primary Care Physicians. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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41
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Dwivedi M, Srivastava R, Bhagat A, Agarwal R, Baghel K, Jain A, Raj S. Pressure ulcer management in paraplegic patients with a novel negative pressure device: a randomised controlled trial. J Wound Care 2016; 25:199-200, 202-4, 206-7. [DOI: 10.12968/jowc.2016.25.4.199] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- M.K. Dwivedi
- Department of Orthopaedic Surgery, King George's Medical University, Lucknow, U.P., India
| | - R.N. Srivastava
- Department of Orthopaedic Surgery, King George's Medical University, Lucknow, U.P., India
| | - A.K. Bhagat
- Department of Surgical Gastroenterology, King George's Medical University, Lucknow, U.P., India
| | - R. Agarwal
- Sanjai Gandhi Post Graduate Institute of Medical Sciences (SGPGIMS), Lucknow, India
| | - K. Baghel
- Department of Orthopaedic Surgery, King George's Medical University, Lucknow, U.P., India
| | - A. Jain
- Department of Microbiology, King George's Medical University, Lucknow, U.P., India
| | - S. Raj
- MS Ramiyah Medical College, Bangalore, India
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Srivastava R, Sharma P, Saini G, Sethi J, Aggarwal A, Goyal K, P M. EP-1816: A hybrid approach for head-neck cancer using on-line image guidance and off-line adaptive planning. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)33067-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Paelinck L, Vanderstraeten B, Srivastava R, Olteanu L, De Wagter C. EP-1524: The effect of the table top modeling on calculations and measurements for the Delta4 phantom. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32774-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Srivastava R. WITHDRAWN: Editorial. Apollo Medicine 2016. [DOI: 10.1016/j.apme.2015.11.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Niranjan R, Rout RK, Srivastava R, Kaushik TC, Gupta SC. A 10(9) neutrons/pulse transportable pulsed D-D neutron source based on flexible head plasma focus unit. Rev Sci Instrum 2016; 87:033504. [PMID: 27036774 DOI: 10.1063/1.4942666] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A 17 kJ transportable plasma focus (PF) device with flexible transmission lines is developed and is characterized. Six custom made capacitors are used for the capacitor bank (CB). The common high voltage plate of the CB is fixed to a centrally triggered spark gap switch. The output of the switch is coupled to the PF head through forty-eight 5 m long RG213 cables. The CB has a quarter time-period of 4 μs and an estimated current of 506 kA is delivered to the PF device at 17 kJ (60 μF, 24 kV) energy. The average neutron yield measured using silver activation detector in the radial direction is (7.1 ± 1.4) × 10(8) neutrons/shot over 4π sr at 5 mbar optimum D2 pressure. The average neutron yield is more in the axial direction with an anisotropy factor of 1.33 ± 0.18. The average neutron energies estimated in the axial as well as in the radial directions are (2.90 ± 0.20) MeV and (2.58 ± 0.20) MeV, respectively. The flexibility of the PF head makes it useful for many applications where the source orientation and the location are important factors. The influence of electromagnetic interferences from the CB as well as from the spark gap on applications area can be avoided by putting a suitable barrier between the bank and the PF head.
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Affiliation(s)
- Ram Niranjan
- Applied Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - R K Rout
- Applied Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - R Srivastava
- Applied Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - T C Kaushik
- Applied Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Satish C Gupta
- Applied Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
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Srivastava R, Batra A, Tyagi A, Dhawan D, Ramakrishnan L, Bakhshi S. Adiponectin correlates with obesity: A study of 159 childhood acute leukemia survivors from India. Indian J Cancer 2016; 52:195-7. [PMID: 26853401 DOI: 10.4103/0019-509x.175824] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Acute lymphoblastic leukemia survivors are predisposed to obesity. However, the exact underlying mechanisms are not known. AIMS The study was done to assess the role of biomarkers of obesity in acute leukemia survivors. SETTINGS AND DESIGNS This is a cross-sectional study conducted at All India Institute of Medical Sciences in survivors of acute leukemia who had completed treatment at least 1 year before enrollment in this study. MATERIALS AND METHODS Obesity was studied by determining the body mass index. Potential biomarkers were studied by assessing serum leptin, resistin, and adiponectin by enzyme-linked immunosorbant assay, and the results were compared in obese versus nonobese survivors. STATISTICAL ANALYSIS Descriptive analysis for baseline demographic factors and Student's t-test for comparing the mean levels of biomarkers among the obese and nonobese survivors. RESULTS One hundred and fifty-nine acute leukemia patients were enrolled in this study with a median follow-up of 36.8 months. The median age was 10 (range: 3-18) years, and 123 (77.3%) patients were males. The overall prevalence of overweight/obesity was 26.4%, and this was similar in acute myeloid leukemia and acute lymphoblastic leukemia sub-groups (26.2% vs. 27.3%, P = 0.9). Mean serum leptin and resistin were similar in obese and nonobese leukemia survivors (3.7 vs. 2.85 pg/mL, P = 0.064; 8.01 vs. 9.33 ng/mL, P = 0.36). However, mean serum adiponectin was significantly lower in obese leukemia survivors (7.97 vs. 11.5 μg/mL, P = 0.023). CONCLUSIONS Obese leukemic survivors had lower serum adiponectin levels than nonobese survivors. However, serum resistin and leptin levels were similar in the two groups.
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Affiliation(s)
| | | | | | | | | | - S Bakhshi
- Department of Medical Oncology, Dr. B. R. A. Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi, India
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Singh VK, Srivastava R, Srivastava BS. Manipulation of BCG vaccine: a double-edged sword. Eur J Clin Microbiol Infect Dis 2016; 35:535-43. [PMID: 26810060 DOI: 10.1007/s10096-016-2579-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 01/07/2016] [Indexed: 12/27/2022]
Abstract
Mycobacterium bovis Bacillus Calmette-Guérin (BCG), an attenuated vaccine derived from M. bovis, is the only licensed vaccine against tuberculosis (TB). Despite its protection against TB in children, the protective efficacy in pulmonary TB is variable in adolescents and adults. In spite of the current knowledge of molecular biology, immunology and cell biology, infectious diseases such as TB and HIV/AIDS are still challenges for the scientific community. Genetic manipulation facilitates the construction of recombinant BCG (rBCG) vaccine that can be used as a highly immunogenic vaccine against TB with an improved safety profile, but, still, the manipulation of BCG vaccine to improve efficacy should be carefully considered, as it can bring in both favourable and unfavourable effects. The purpose of this review is not to comprehensively review the interaction between microorganisms and host cells in order to use rBCG expressing M. tuberculosis (Mtb) immunodominant antigens that are available in the public domain, but, rather, to also discuss the limitations of rBCG vaccine, expressing heterologous antigens, during manipulation that pave the way for a promising new vaccine approach.
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Affiliation(s)
- V K Singh
- Section for Immunology, Department of Experimental Medical Science, Lund University, BMC D14, 22184, Lund, Sweden.
| | - R Srivastava
- Division of Microbiology, CSIR-Central Drug Research Institute, Jankipuram Extension, Lucknow, India
| | - B S Srivastava
- Division of Microbiology, CSIR-Central Drug Research Institute, Jankipuram Extension, Lucknow, India
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Arunkumar P, Indulekha S, Vijayalakshmi S, Srivastava R. Synthesis, characterizations, in vitro and in vivo evaluation of Etoricoxib-loaded Poly (Caprolactone) microparticles--a potential Intra-articular drug delivery system for the treatment of Osteoarthritis. J Biomater Sci Polym Ed 2016; 27:303-16. [PMID: 26689653 DOI: 10.1080/09205063.2015.1125564] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Intra-articular Drug delivery systems (IA-DDS) deliver the drug directly to the diseased joint space with significantly lowered systemic toxicities. In this work, we explored Etoricoxib (COX-2 inhibitor)-loaded Poly caprolactone (PCL) microparticles (MPs) as a potential IA-DDS. MPs were prepared by Oil/Water (O/W) emulsion-solvent evaporation method. Formulation parameters like polymer to drug ratio, stabilizer concentration were optimized to get the maximum encapsulation efficiency. The prepared particles were characterized using Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction studies (XRD), and Differential Scanning Calorimetry (DSC). The particles were found to be spherical and smooth-surfaced using SEM. FTIR studies proved that there was no chemical interaction between the drug and the polymer. XRD and DSC studies confirmed that Etoricoxib existed in its amorphous form while PCL had retained its semi-crystalline phase during the micro-encapsulation process. In vitro drug release studies proved that there was controlled release of the drug from the MPs for nearly 28 days. In vivo synovial drug clearance studies on SD rats proved that drug leach out rate from the joint region to the systemic circulation was slow which indicated that MPs had a good drug retention capacity. In vivo fluorescence imaging results confirmed that MPs could stay longer in the joint region for almost a month. Thus, PCL microparticles could be a potential IA-DDS for the treatment of the diseased joint regions especially for Osteoarthritis.
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Affiliation(s)
- P Arunkumar
- a Centre for Research in Nanotechnology and Science (CRNTS), Indian Institute of Technology , Bombay , India
| | - S Indulekha
- b Department of Biosciences and Bioengineering , Indian Institute of Technology , Bombay , India
| | - S Vijayalakshmi
- a Centre for Research in Nanotechnology and Science (CRNTS), Indian Institute of Technology , Bombay , India
| | - R Srivastava
- b Department of Biosciences and Bioengineering , Indian Institute of Technology , Bombay , India
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Indulekha S, Arunkumar P, Bahadur D, Srivastava R. Thermoresponsive polymeric gel as an on-demand transdermal drug delivery system for pain management. Mater Sci Eng C Mater Biol Appl 2016; 62:113-22. [PMID: 26952404 DOI: 10.1016/j.msec.2016.01.021] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 11/23/2015] [Accepted: 01/08/2016] [Indexed: 10/22/2022]
Abstract
The main aim of this work is to design a heat triggered transdermal drug delivery system (TDDS) using a thermoresponsive polymer, poly (N-vinyl caprolactam) [PNVCL] based gel, where in patients can themselves administer a pulse of drug on mere application of heat pad over the TDDS, whenever pain is experienced. The phase transition temperature of PNVCL was tuned to 35 °C by grafting it onto a pH sensitive biopolymer, Chitosan, to synthesize Chitosan-g-PNVCL (CP) co-polymer which render the gel both thermo- and pH-responsive property. The application of triggered delivery was explored by loading acetamidophenol (a model hydrophilic drug) and etoricoxib (a model hydrophobic drug). In vitro drug release experiments were performed at three different temperatures (25, 32 and 39 °C) at two different pH (5.5 and 7) to study its drug release with response to temperature and pH. Drug release profiles obtained were found to have enhanced release for both the drugs respectively at 39 °C (above LCST) and pH5.5 when compared to other release conditions. In vitro skin permeation of both the drugs performed in rat abdominal skin using Franz diffusion cell showed enhanced drug release when the skin was subjected to higher temperature (39 °C). Moreover, it was also found that skin permeation for hydrophobic drug was better than that of hydrophilic drug. The in vivo biocompatibility studies of the CP gel in rat skin proved that the gel is biocompatible. The results obtained demonstrated the potential use of the thermoresponsive CP gel as an on-demand localized drug delivery system.
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Affiliation(s)
- S Indulekha
- Department of Biosciences & Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - P Arunkumar
- Centre for Research in Nanotechnology and Science, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - D Bahadur
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - R Srivastava
- Department of Biosciences & Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India.
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