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Yathavan B, Ellis A, Jedrzkiewicz J, Subrahmanyam N, Khurana N, Pulsipher A, Alt JA, Ghandehari H. Systemic administration of budesonide in pegylated liposomes for improved efficacy in chronic rhinosinusitis. J Control Release 2023; 360:274-284. [PMID: 37353160 DOI: 10.1016/j.jconrel.2023.06.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/18/2023] [Accepted: 06/20/2023] [Indexed: 06/25/2023]
Abstract
Chronic rhinosinusitis (CRS) is a chronic inflammatory condition affecting the nasal and paranasal sinuses of approximately 11.5% of the United States adult population. Oral corticosteroids are effective in controlling sinonasal inflammation in CRS, but the associated adverse effects limit their clinical use. Topical budesonide has demonstrated clinical efficacy in patients with CRS. Herein, we investigated the systemic delivery of liposomes tethered with poly(ethylene glycol) (PEG) and loaded with budesonide in a murine model of CRS. PEGylated liposomes encapsulated with budesonide phosphate (L-BudP) were administered via tail vein injection, and the feasibility of L-BudP to reduce sinonasal inflammation was compared to that of free budesonide phosphate (F-BudP) and topical budesonide phosphate (T-BudP) treatment over a 14-day study period. Compared to a single injection of F-BudP and repeat T-BudP administration, a single injection of L-BudP demonstrated increased and prolonged efficacy, resulting in the significant improvement of sinonasal tissue histopathological scores (p < 0.05) with decreased immune cell infiltration (p < 0.05). Toxicities associated with L-BudP and T-BudP treatment, assessed via body and organ weight, as well as peripheral blood liver enzyme and differential white blood cell analyses, were transient and comparable. These data suggest that systemic liposomal budesonide treatment results in improved efficacy over topical treatment.
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Affiliation(s)
- Bhuvanesh Yathavan
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, USA; Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT 84112, USA
| | - Alexa Ellis
- College of Pharmacy, University of Utah, Salt Lake City, UT 84112, USA
| | | | - Nithya Subrahmanyam
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, USA; Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT 84112, USA
| | - Nitish Khurana
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, USA; Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT 84112, USA
| | - Abigail Pulsipher
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, USA; Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT 84112, USA; Department of Otolaryngology - Head and Neck Surgery, University of Utah School of Medicine, Salt Lake City, UT, USA.
| | - Jeremiah A Alt
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, USA; Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT 84112, USA; Department of Otolaryngology - Head and Neck Surgery, University of Utah School of Medicine, Salt Lake City, UT, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, USA.
| | - Hamidreza Ghandehari
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, USA; Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT 84112, USA; Department of Otolaryngology - Head and Neck Surgery, University of Utah School of Medicine, Salt Lake City, UT, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, USA.
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Subrahmanyam N, Yathavan B, Yu SM, Ghandehari H. Targeting Intratibial Osteosarcoma Using Water-Soluble Copolymers Conjugated to Collagen Hybridizing Peptides. Mol Pharm 2023; 20:1670-1680. [PMID: 36724294 PMCID: PMC10799843 DOI: 10.1021/acs.molpharmaceut.2c00880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Osteosarcoma (OS) is the most common form of primary malignant bone cancer in adolescents. Over the years, OS prognosis has greatly improved due to adjuvant and neoadjuvant (preoperative) chemotherapeutic treatment, increasing the chances of successful surgery and reducing the need for limb amputation. However, chemotherapeutic treatment to treat OS is limited by off-target toxicities and requires improved localization at the tumor site. Collagen, the main constituent of bone tissue, is extensively degraded and remodeled in OS, leading to an increased availability of denatured (monomeric) collagen. Collagen hybridizing peptides (CHPs) comprise a class of peptides rationally designed to selectively bind to denatured collagen. In this work, we have conjugated CHPs as targeting moieties to water-soluble N-(2-hydroxypropyl)methacrylamide (HPMA) copolymers to target OS tumors. We demonstrated increased accumulation of collagen-targeted HPMA copolymer-CHP conjugates compared to nontargeted HPMA copolymers, as well as increased retention compared to both nontargeted copolymers and CHPs, in a murine intratibial OS tumor model. Furthermore, we used microcomputed tomography analysis to evaluate the bone microarchitecture and correlated bone morphometric parameters (porosity, bone volume, and surface area) with maximum accumulation (Smax) and accumulation at 168 h postinjection (S168) of the copolymers at the tumor. Our results provide the foundation for the use of HPMA copolymer-CHP conjugates as targeted drug delivery systems in OS tumors.
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Affiliation(s)
- Nithya Subrahmanyam
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, Utah 84112, United States
- Utah Center for Nanomedicine, University of Utah, Salt Lake City, Utah 84112, United States
| | - Bhuvanesh Yathavan
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, Utah 84112, United States
- Utah Center for Nanomedicine, University of Utah, Salt Lake City, Utah 84112, United States
| | - S Michael Yu
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, Utah 84112, United States
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Hamidreza Ghandehari
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, Utah 84112, United States
- Utah Center for Nanomedicine, University of Utah, Salt Lake City, Utah 84112, United States
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
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Subrahmanyam N, Yathavan B, Kessler J, Yu SM, Ghandehari H. HPMA copolymer-collagen hybridizing peptide conjugates targeted to breast tumor extracellular matrix. J Control Release 2023; 353:278-288. [PMID: 36244509 PMCID: PMC10799842 DOI: 10.1016/j.jconrel.2022.10.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 10/04/2022] [Accepted: 10/09/2022] [Indexed: 12/03/2022]
Abstract
The extracellular matrix (ECM) is dynamically involved in many aspects of cell growth and survival, and it plays an active role in cancer etiology. In comparison to healthy ECM, tumor associated ECM shows high collagen deposition and remodeling activity, which results in an increased amount of denatured collagen strands in tumor tissues. Capitalizing on this distinguishing feature, we developed tumor-localizing polymeric carriers that selectively bind to denatured collagen in the tumor ECM. We synthesized N-(2-hydroxypropyl)methacrylamide (HPMA) copolymers with their side chains conjugated to collagen hybridizing peptides (CHPs). HPMA copolymer-CHP conjugates exhibited selective affinity to denatured collagen and localized to tumors in an orthotopic MDA-MB-231 murine breast cancer model. The conjugates had increased tumor localization compared to copolymers with scrambled peptides in the side chains, as well as increased retention compared to free CHPs. Such conjugates show promise as carriers for ECM-acting drugs and imaging agents in the management of diseases characterized by high ECM remodeling activity.
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Affiliation(s)
- Nithya Subrahmanyam
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112 United States of America; Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT 84112, United States of America
| | - Bhuvanesh Yathavan
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112 United States of America; Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT 84112, United States of America
| | - Julian Kessler
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, United States of America
| | - S Michael Yu
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112 United States of America; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, United States of America.
| | - Hamidreza Ghandehari
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112 United States of America; Utah Center for Nanomedicine, University of Utah, Salt Lake City, UT 84112, United States of America; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, United States of America.
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Battogtokh G, Gotov O, Subrahmanyam N, Ko YT, Ghandehari H. GRP78‐Targeted HPMA Copolymer‐Photosensitizer Conjugate for Hyperthermia‐Induced Enhanced Uptake and Cytotoxicity in MCF‐7 Breast Cancer Cells. Macromol Biosci 2019; 19:e1900032. [DOI: 10.1002/mabi.201900032] [Citation(s) in RCA: 4] [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] [Received: 02/03/2019] [Revised: 05/15/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Gantumur Battogtokh
- Yonsei Institute of Pharmaceutical ScienceCollege of PharmacyYonsei University 85, Songdogwahak‐ro, Yeonsu‐gu Incheon 21983 Republic of Korea
- College of PharmacyGachon University 191 Hambakmoe‐ro, Yeonsu‐gu Incheon 406–799 South Korea
- Departments of Pharmaceutics and Pharmaceutical ChemistryUniversity of Utah Sorenson Molecular Biotechnology Building36 S. Wasatch Dr. Salt Lake City UT 84112 USA
- Utah Center for NanomedicineNano Institute of UtahUniversity of Utah Sorenson Molecular Biotechnology Building36 S. Wasatch Dr. Salt Lake City UT 84112 USA
| | - Oyuntuya Gotov
- College of PharmacyGachon University 191 Hambakmoe‐ro, Yeonsu‐gu Incheon 406–799 South Korea
| | - Nithya Subrahmanyam
- Departments of Pharmaceutics and Pharmaceutical ChemistryUniversity of Utah Sorenson Molecular Biotechnology Building36 S. Wasatch Dr. Salt Lake City UT 84112 USA
- Utah Center for NanomedicineNano Institute of UtahUniversity of Utah Sorenson Molecular Biotechnology Building36 S. Wasatch Dr. Salt Lake City UT 84112 USA
| | - Young Tag Ko
- College of PharmacyGachon University 191 Hambakmoe‐ro, Yeonsu‐gu Incheon 406–799 South Korea
| | - Hamidreza Ghandehari
- Departments of Pharmaceutics and Pharmaceutical ChemistryUniversity of Utah Sorenson Molecular Biotechnology Building36 S. Wasatch Dr. Salt Lake City UT 84112 USA
- Bioengineering, University of Utah Sorenson Molecular Biotechnology Building36 S. Wasatch Dr. Salt Lake City UT 84112 USA
- Utah Center for NanomedicineNano Institute of UtahUniversity of Utah Sorenson Molecular Biotechnology Building36 S. Wasatch Dr. Salt Lake City UT 84112 USA
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Liu GW, Prossnitz AN, Eng DG, Cheng Y, Subrahmanyam N, Pippin JW, Lamm RJ, Ngambenjawong C, Ghandehari H, Shankland SJ, Pun SH. Glomerular disease augments kidney accumulation of synthetic anionic polymers. Biomaterials 2018; 178:317-325. [DOI: 10.1016/j.biomaterials.2018.06.001] [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] [Received: 03/07/2018] [Revised: 05/31/2018] [Accepted: 06/02/2018] [Indexed: 12/22/2022]
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Frazier N, Payne A, Dillon C, Subrahmanyam N, Ghandehari H. Enhanced efficacy of combination heat shock targeted polymer therapeutics with high intensity focused ultrasound. Nanomedicine 2016; 13:1235-1243. [PMID: 27913213 DOI: 10.1016/j.nano.2016.11.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 11/15/2016] [Accepted: 11/21/2016] [Indexed: 11/17/2022]
Abstract
Combination of polymer therapeutics and hyperthermia has been shown to enhance accumulation in selectively heated tumor tissue. The additional use of heat shock (HS)-targeting towards tumor tissues can further enhance accumulation and retention, and improve therapeutic outcomes. In this work, high intensity focused ultrasound (HIFU) was used to generate hyperthermia in prostate tumor tissue. Upregulation of the cell surface HS receptor glucose regulated protein 78 kDa (GRP78) was observed after treatment with HIFU hyperthermia which was then targeted by specific HS-targeting peptides. We used the peptide sequence WDLAWMFRLPVG attached to the side chains of water-soluble N-(2-hydroxypropyl)methacrylamide (HPMA) copolymers containing docetaxel (DOC) conjugated via a lysosomally degradable linker. It was shown that HIFU-mediated HS-targeted copolymer-DOC conjugates improved treatment efficacy in a murine prostate tumor xenograft model. These results show that the use of HIFU hyperthermia in combination with HS-targeted polymer-drug conjugates has potential to improve therapeutic outcomes in prostate cancer treatment.
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Affiliation(s)
- Nick Frazier
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA; Center for Nanomedicine, Nano Institute of Utah, University of Utah, Salt Lake City, UT, USA
| | - Allison Payne
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, USA
| | - Christopher Dillon
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, USA
| | - Nithya Subrahmanyam
- Center for Nanomedicine, Nano Institute of Utah, University of Utah, Salt Lake City, UT, USA; Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, USA
| | - Hamidreza Ghandehari
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA; Center for Nanomedicine, Nano Institute of Utah, University of Utah, Salt Lake City, UT, USA; Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, USA.
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Frazier N, Payne A, de Bever J, Dillon C, Panda A, Subrahmanyam N, Ghandehari H. High intensity focused ultrasound hyperthermia for enhanced macromolecular delivery. J Control Release 2016; 241:186-193. [PMID: 27686583 DOI: 10.1016/j.jconrel.2016.09.030] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 09/11/2016] [Accepted: 09/24/2016] [Indexed: 12/25/2022]
Abstract
Mild hyperthermia has been used in combination with polymer therapeutics to further increase delivery to solid tumors and enhance efficacy. An attractive method for generating heat is through non-invasive high intensity focused ultrasound (HIFU). HIFU is often used for ablative therapies and must be adapted to produce uniform mild hyperthermia in a solid tumor. In this work a magnetic resonance imaging guided HIFU (MRgHIFU) controlled feedback system was developed to produce a spatially uniform 43°C heating pattern in a subcutaneous mouse tumor. MRgHIFU was employed to create hyperthermic conditions that enhance macromolecular delivery. Using a mouse model with two subcutaneous tumors, it was demonstrated that MRgHIFU enhanced delivery of both Evans blue dye (EBD) and Gadolinium-chelated N-(2-hydroxypropyl)methacrylamide (HPMA) copolymers. The EBD accumulation in the heated tumors increased by nearly 2-fold compared to unheated tumors. The Gadolinium-chelated HPMA copolymers also showed significant enhancement in accumulation over control as evaluated through MRI T1-mapping measurements. Results show the potential of HIFU-mediated hyperthermia for enhanced delivery of polymer therapeutics.
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Affiliation(s)
- Nick Frazier
- Department of Bioengineering, University of Utah, Salt Lake City, 84112, USA; Center for Nanomedicine, Nano Institute of Utah, University of Utah, Salt Lake City, 84112, USA
| | - Allison Payne
- Department of Radiology, University of Utah, Salt Lake City, 84112, USA
| | - Joshua de Bever
- Department of Radiology, University of Utah, Salt Lake City, 84112, USA
| | | | - Apoorva Panda
- Center for Nanomedicine, Nano Institute of Utah, University of Utah, Salt Lake City, 84112, USA; Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, 84112, USA
| | - Nithya Subrahmanyam
- Center for Nanomedicine, Nano Institute of Utah, University of Utah, Salt Lake City, 84112, USA; Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, 84112, USA
| | - Hamidreza Ghandehari
- Department of Bioengineering, University of Utah, Salt Lake City, 84112, USA; Center for Nanomedicine, Nano Institute of Utah, University of Utah, Salt Lake City, 84112, USA; Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, 84112, USA.
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Chen QH, Yu K, Zhang X, Chen G, Hoover A, Leon F, Wang R, Subrahmanyam N, Addo Mekuria E, Harinantenaina Rakotondraibe L. A new class of hybrid anticancer agents inspired by the synergistic effects of curcumin and genistein: Design, synthesis, and anti-proliferative evaluation. Bioorg Med Chem Lett 2015; 25:4553-6. [PMID: 26341135 DOI: 10.1016/j.bmcl.2015.08.064] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [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: 06/30/2015] [Revised: 08/19/2015] [Accepted: 08/24/2015] [Indexed: 11/30/2022]
Abstract
Inspired by the synergistic effects of dietary natural products with different scaffolds on the inhibition of cancer cell proliferation, incorporation of central (1E,4E)-1,4-penta-dien-3-one linker (an optimal substitute for the central metabolically unstable diketone linker of curcumin), 1-alkyl-1H-imidazol-2-yl (a promising bioisostere of terminal aryl group in curcumin), and chromone (the common pharmacophore in genistein and quercetin) into one chemical entity resulted in ten new hybrid molecules, 3-((1E,4E)-5-(1-alkyl-1H-imidazol-2-yl)-3-oxopenta-1,4-dien-1-yl)-4H-chromen-4-ones. They were synthesized through a three-step transformation using acid-catalyzed aldol condensation as key step. The WST-1 cell proliferation assay showed that they have greater anti-proliferative potency than curcumin, quercetin, and genistein on both androgen-dependent and androgen-independent human prostate cancer cells.
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Affiliation(s)
- Qiao-Hong Chen
- Department of Chemistry, California State University, Fresno, 2555 E. San Ramon Avenue, M/S SB70, Fresno, CA 93740, USA.
| | - Kevin Yu
- Department of Chemistry, California State University, Fresno, 2555 E. San Ramon Avenue, M/S SB70, Fresno, CA 93740, USA
| | - Xiaojie Zhang
- Department of Chemistry, California State University, Fresno, 2555 E. San Ramon Avenue, M/S SB70, Fresno, CA 93740, USA
| | - Guanglin Chen
- Department of Chemistry, California State University, Fresno, 2555 E. San Ramon Avenue, M/S SB70, Fresno, CA 93740, USA
| | - Andrew Hoover
- Department of Chemistry, California State University, Fresno, 2555 E. San Ramon Avenue, M/S SB70, Fresno, CA 93740, USA
| | - Francisco Leon
- Department of Chemistry, California State University, Fresno, 2555 E. San Ramon Avenue, M/S SB70, Fresno, CA 93740, USA
| | - Rubing Wang
- Department of Chemistry, California State University, Fresno, 2555 E. San Ramon Avenue, M/S SB70, Fresno, CA 93740, USA
| | - Nithya Subrahmanyam
- Department of Chemistry, California State University, Fresno, 2555 E. San Ramon Avenue, M/S SB70, Fresno, CA 93740, USA
| | - Ermias Addo Mekuria
- College of Pharmacy/Division of Medicinal Chemistry and Pharmacognosy, The Ohio State University, 434 Parks Hall, 500 W 12th Avenue, Columbus, OH 43210, USA
| | - Liva Harinantenaina Rakotondraibe
- College of Pharmacy/Division of Medicinal Chemistry and Pharmacognosy, The Ohio State University, 434 Parks Hall, 500 W 12th Avenue, Columbus, OH 43210, USA
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Joshipura M, Dabke S, Subrahmanyam N. Comparing Four Compound-specific Cohesion Factor Relationships for Soave–Redlich–Kwong Equation of State. Indian Chemical Engineer 2013. [DOI: 10.1080/00194506.2013.785110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Singh A, Modi S, Subrahmanyam N, Munshi P, Upadhyay VK, Jasra RV, Maiti M. Retarding Effect of Aromatic Solvents on Cobalt(II)-Based Catalyst System during Synthesis of Highcis-1,4-Polybutadiene. Ind Eng Chem Res 2010. [DOI: 10.1021/ie101324d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
Isolated thrombocytopaenia can occur in 30-60% of HIV-infected patients. The majority of patients with HIV-related immune thrombocytopaenia have only minor submucosal bleeding problems. Cases of subarachnoid haemorrhage and subdural haematoma are very rare and management of such cases is a challenging problem for physicians. We report a rare case of subdural haematoma due to thrombocytopaenia in a 40-year-old HIV-positive man.
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Srivastava VK, Sharma SK, Shukla RS, Subrahmanyam N, Jasra RV. Kinetic Studies on the Hydroformylation of 1-Hexene Using RhCl(AsPh3)3 as a Catalyst. Ind Eng Chem Res 2005. [DOI: 10.1021/ie049746m] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vivek K. Srivastava
- Silicates and Catalysis Discipline, Central Salt and Marine Chemicals Research Institute (CSMCRI), Bhavnagar 364 002, India, and Chemical Engineering Department, The M.S. University of Baroda, Vadodara 390 001, India
| | - Sumeet K. Sharma
- Silicates and Catalysis Discipline, Central Salt and Marine Chemicals Research Institute (CSMCRI), Bhavnagar 364 002, India, and Chemical Engineering Department, The M.S. University of Baroda, Vadodara 390 001, India
| | - Ram S. Shukla
- Silicates and Catalysis Discipline, Central Salt and Marine Chemicals Research Institute (CSMCRI), Bhavnagar 364 002, India, and Chemical Engineering Department, The M.S. University of Baroda, Vadodara 390 001, India
| | - N. Subrahmanyam
- Silicates and Catalysis Discipline, Central Salt and Marine Chemicals Research Institute (CSMCRI), Bhavnagar 364 002, India, and Chemical Engineering Department, The M.S. University of Baroda, Vadodara 390 001, India
| | - Raksh V. Jasra
- Silicates and Catalysis Discipline, Central Salt and Marine Chemicals Research Institute (CSMCRI), Bhavnagar 364 002, India, and Chemical Engineering Department, The M.S. University of Baroda, Vadodara 390 001, India
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Ramanathan P, Patel RB, Subrahmanyam N, Nayak UN, Sachdev SS, Ramamoorthy N. Visualization of suppressed thyroid tissue by technetium-99m-tertiary butyl isonitrile: an alternative to post-TSH stimulation scanning. J Nucl Med 1990; 31:1163-5. [PMID: 2362195] [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: 12/31/2022] Open
Abstract
The autonomously functioning thyroid nodule (AFTN) is a discrete, nodular structure which operates independently of pituitary control and without relation to the remaining thyroid tissue. Presently, for the visualization of a suppressed thyroid lobe, a patient has to undergo the thyrotropin (TSH) stimulation test, which has several disadvantages. In this study we have used tertiary butyl isonitrile (99mTc-TBI), well known as a myocardial imaging agent, for visualization of the suppressed lobe. Thirteen of fourteen patients studied demonstrated a contralateral lobe on a 99mTc-TBI scan which was not visualized with a 99mTc0(4) or 131I scan. Although it is not possible to demonstrate the autonomous nature of the hyperfunctioning thyroid nodule using 99mTc-TBI, we conclude that it is feasible to use this agent to visualize the lobe without the TSH test.
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Affiliation(s)
- P Ramanathan
- Radiation Medicine Centre, (B.A.R.C.), Tata Memorial Centre Annexe, Parel, Bombay, India
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Luthra SP, Narayan I, Subrahmanyam N. Surface area of plaster models by the benzene adsorption method. J Indian Dent Assoc 1973; 45:316-8. [PMID: 4596597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Subrahmanyam N, Ramaiah NA. Production of Joshi Effect under High‐Frequency Electric Discharge in Iodine Vapor. J Chem Phys 1953. [DOI: 10.1063/1.1698830] [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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