32 results on '"Amantana A"'
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2. Pencantuman Keterangan Tidak Halal pada Produk Farmasi Jenis Obat-Obatan yang Mengandung DNA Babi Menurut Undang-Undang Nomor 33 Tahun 2014 Tentang Jaminan Produk Halal sebagai Upaya Perlindungan Konsumen
- Author
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Amantana, Arham Bima, primary, Zakiran, Asep Hakim, additional, and Imaniyati, Neni Sri, additional
- Published
- 2023
- Full Text
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3. Pencantuman Keterangan Tidak Halal pada Produk Farmasi Jenis Obat-Obatan yang Mengandung DNA Babi Menurut Undang-Undang Nomor 33 Tahun 2014 Tentang Jaminan Produk Halal sebagai Upaya Perlindungan Konsumen
- Author
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Arham Bima Amantana, Asep Hakim Zakiran, and Neni Sri Imaniyati
- Abstract
Law Number 33 of 2014 concerning Guarantees for Halal Products (UUJPH) regulates the obligation of business actors to include non-halal information on products containing haram ingredients. The existence of regulations regarding these obligations in practice are not followed by compliance with business actors, in Indonesia itself the last 4 years have been enlivened by cases of the discovery of pharmaceutical products containing haram ingredients circulating in the Indonesian market without including non-halal information on their packaging. This study aims to determine the responsibility of business actors who do not include non-halal information on pharmaceutical products types of drugs containing Pig DNA according to Law Number 33 of 2014 concerning Guarantees for Halal Products and to determine legal protection for consumers for the distribution of pharmaceutical types of drugs containing Pig DNA without including information that is not halal according to Law Number 33 of 2014 concerning Guarantees for Halal Products. The researcher uses a normative juridical approach with analytical descriptive research specifications and uses secondary data types. The data collection technique used is the method of literature and the method of analysis used is qualitative analysis. The results of this study are that the responsibility of business actors who do not include non-halal information on pharmaceutical products of the type of drugs containing Pig DNA according to Law Number 33 of 2014 concerning Guarantees for Halal Products is absolute responsibility and uses the principle of inverted liability. Legal protection for Muslim consumers for the circulation of pharmaceutical products of the type of drugs containing Pig DNA without including non-halal information according to Law Number 33 of 2014 concerning Guarantees for Halal Products can be carried out through internal and external legal protection. Abstrak. Undang-Undang Nomor 33 Tahun 2014 tentang Jaminan Produk Halal (UUJPH) mengatur mengenai kewajiban pelaku usaha untuk melakukan pencantuman keterangan tidak halal pada produk yang mengandung bahan haram. Adanya peraturan mengenai kewajiban tersebut dalam prakteknya tidak di ikuti dengan patuhnya oleh para pelaku usaha, di Indonesia sendiri belakangan 4 tahun ini diramaikan dengan kasus ditemukannya produk farmasi yang mengandung bahan haram beredar dipasaran Indonesia dengan tanpa mencantumkan keterangan tidak halal didalam kemasannya. Penelitian ini bertujuan untuk mengetahui tanggung jawab pelaku usaha yang tidak mencantumkan keterangan tidak halal pada produk farmasi Jenis obat-obatan yang mengandung DNA Babi menurut Undang-Undang Nomor 33 Tahun 2014 Tentang Jaminan Produk Halal dan untuk mengetahui perlindungan hukum terhadap konsumen atas beredarnya produk farmasi jenis obat-obatan yang mengandung DNA Babi tanpa mencantumkan keterangan tidak halal menurut Undang-Undang Nomor 33 Tahun 2014 Tentang Jaminan Produk Halal. Peneliti menggunakan metode pendekatan yuridis normatif dengan spesifikasi penelitian deskriptif analitis dan menggunakan jenis data sekunder. Teknik pengumpulan data yang digunakan adalah metode kepustakaan serta metode analisis yang digunakan adalah analisis kualitatif. Hasil penelitian ini adalah tanggung jawab pelaku usaha yang tidak mencantumkan keterangan tidak halal pada produk farmasi jenis obat-obatan yang mengandung DNA Babi menurut Undang-Undang Nomor 33 Tahun 2014 Tentang Jaminan Produk Halal adalah tanggung jawab mutlak dan menggunakan prinsip pertanggungjawaban terbalik. Perlindungan hukum terhadap konsumen muslim atas beredarnya produk farmasi jenis obat-obatan yang mengandung DNA Babi tanpa mencantumkan keterangan tidak halal menurut Undang-Undang Nomor 33 Tahun 2014 Tentang Jaminan Produk Halal dapat dilakukan melalui perlindungan hukum secara internal dan eksternal.
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- 2023
- Full Text
- View/download PDF
4. Pharmacokinetics and interspecies allometric scaling of ST-246, an oral antiviral therapeutic for treatment of orthopoxvirus infection.
- Author
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Adams Amantana, Yali Chen, Shanthakumar R Tyavanagimatt, Kevin F Jones, Robert Jordan, Jarasvech Chinsangaram, Tove C Bolken, Janet M Leeds, and Dennis E Hruby
- Subjects
Medicine ,Science - Abstract
Plasma pharmacokinetics of ST-246, smallpox therapeutic, was evaluated in mice, rabbits, monkeys and dogs following repeat oral administrations by gavage. The dog showed the lowest Tmax of 0.83 h and the monkey, the highest value of 3.25 h. A 2- to 4-fold greater dose-normalized Cmax was observed for the dog compared to the other species. The mouse showed the highest dose-normalized AUC, which was 2-fold greater than that for the rabbit and monkey both of which by approximation, recorded the lowest value. The Cl/F increased across species from 0.05 L/h for mouse to 42.52 L/h for dog. The mouse showed the lowest VD/F of 0.41 L and the monkey, the highest VD/F of 392.95 L. The calculated extraction ratios were 0.104, 0.363, 0.231 and 0.591 for mouse, rabbit, monkey and dog, respectively. The dog showed the lowest terminal half-life of 3.10 h and the monkey, the highest value of 9.94 h. The simple allometric human VD/F and MLP-corrected Cl/F were 2311.51 L and 51.35 L/h, respectively, with calculated human extraction ratio of 0.153 and terminal half-life of 31.20 h. Overall, a species-specific difference was observed for Cl/F with this parameter increasing across species from mouse to dog. The human MLP-corrected Cl/F, terminal half-life, extraction ratios were in close proximity to the observed estimates. In addition, the first-in-humans (FIH) dose of 485 mg, determined from the MLP-corrected allometry Cl/F, was well within the dose range of 400 mg and 600 mg administered in healthy adult human volunteers.
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- 2013
- Full Text
- View/download PDF
5. Comparison of the safety and pharmacokinetics of ST-246® after i.v. infusion or oral administration in mice, rabbits and monkeys.
- Author
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Yali Chen, Adams Amantana, Shanthakumar R Tyavanagimatt, Daniela Zima, X Steven Yan, Gopi Kasi, Morgan Weeks, Melialani A Stone, William C Weimers, Peter Samuel, Ying Tan, Kevin F Jones, Daniel R Lee, Shirley S Kickner, Bradley M Saville, Martin Lauzon, Alan McIntyre, Kady M Honeychurch, Robert Jordan, Dennis E Hruby, and Janet M Leeds
- Subjects
Medicine ,Science - Abstract
BackgroundST-246® is an antiviral, orally bioavailable small molecule in clinical development for treatment of orthopoxvirus infections. An intravenous (i.v.) formulation may be required for some hospitalized patients who are unable to take oral medication. An i.v. formulation has been evaluated in three species previously used in evaluation of both efficacy and toxicology of the oral formulation.Methodology/principal findingsThe pharmacokinetics of ST-246 after i.v. infusions in mice, rabbits and nonhuman primates (NHP) were compared to those obtained after oral administration. Ten minute i.v. infusions of ST-246 at doses of 3, 10, 30, and 75 mg/kg in mice produced peak plasma concentrations ranging from 16.9 to 238 µg/mL. Elimination appeared predominately first-order and exposure dose-proportional up to 30 mg/kg. Short i.v. infusions (5 to 15 minutes) in rabbits resulted in rapid distribution followed by slower elimination. Intravenous infusions in NHP were conducted at doses of 1 to 30 mg/kg. The length of single infusions in NHP ranged from 4 to 6 hours. The pharmacokinetics and tolerability for the two highest doses were evaluated when administered as two equivalent 4 hour infusions initiated 12 hours apart. Terminal elimination half-lives in all species for oral and i.v. infusions were similar. Dose-limiting central nervous system effects were identified in all three species and appeared related to high C(max) plasma concentrations. These effects were eliminated using slower i.v. infusions.Conclusions/significancePharmacokinetic profiles after i.v. infusion compared to those observed after oral administration demonstrated the necessity of longer i.v. infusions to (1) mimic the plasma exposure observed after oral administration and (2) avoid C(max) associated toxicity. Shorter infusions at higher doses in NHP resulted in decreased clearance, suggesting saturated distribution or elimination. Elimination half-lives in all species were similar between oral and i.v. administration. The administration of ST-246 was well tolerated as a slow i.v. infusion.
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- 2011
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6. Antimutagenic activity of selenium-enriched green tea toward the heterocyclic amine 2-amino-3-methylimidazo[4,5-f]quinoline
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Amantana, Adams, Santana-Rios, Gilberto, Butler, Judith A., Xu, Meirong, Whanger, Phil D., and Dashwood, Roderick H.
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- 2002
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7. Pharmacokinetics and biodistribution of phosphorodiamidate morpholino antisense oligomers
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Amantana, Adams and Iversen, Patrick L
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- 2005
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8. Treatment of AG129 mice with antisense morpholino oligomers increases survival time following challenge with dengue 2 virus
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Stein, David A., Huang, Claire Y.-H., Silengo, Shawn, Amantana, Adams, Crumley, Stacy, Blouch, Robert E., Iversen, Patrick L., and Kinney, Richard M.
- Published
- 2008
9. AVI-4065: An Antisense Approach to Active HCV Infection; Preclinical and Clinical Evaluation: 21
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Iversen, Patrick, Amantana, A., Stein, D., Rjinbrand, R., Borne, N., Dagan, S., Ilan, E., Christensen, J., Burger, D., and OʼHanley, P.
- Published
- 2006
10. Identification of putative transcription factor binding sites in rodent selenoprotein W promoter
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Amantana, A., Vorachek, W.R., Butler, J.A., Ream, W., and Whanger, P.D.
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- 2004
- Full Text
- View/download PDF
11. Effect of copper, zinc and cadmium on the promoter of selenoprotein W in glial and myoblast cells
- Author
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Amantana, A., Vorachek, W.R., Butler, J.A., Costa, N.D., and Whanger, P.D.
- Published
- 2002
- Full Text
- View/download PDF
12. Potent antimutagenic activity of white tea in comparison with green tea in the Salmonella assay
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Santana-Rios, Gilberto, Orner, Gayle A., Amantana, Adams, Provost, Cynthia, Wu, Shiau-Yin, and Dashwood, Roderick H.
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- 2001
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13. Treatment of AG129 mice with antisense morpholino oligomers increases survival time following challenge with dengue 2 virus
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Stacy Crumley, Claire Y.-H. Huang, Shawn J. Silengo, Patrick L. Iversen, Robert E. Blouch, Adams Amantana, David A. Stein, and Richard M. Kinney
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Microbiology (medical) ,morpholino oligomers ,Ratón ,viruses ,antisense ,Morpholines ,Viral Plaque Assay ,Dengue virus ,medicine.disease_cause ,Antiviral Agents ,Virus ,Morpholinos ,Dengue ,Mice ,Plasma ,Pharmacokinetics ,flavivirus ,medicine ,Animals ,Pharmacology (medical) ,PPMO ,Original Research ,Pharmacology ,biology ,dengue virus ,Body Weight ,Oligonucleotides, Antisense ,biology.organism_classification ,Virology ,antiviral ,PMO ,Survival Analysis ,Flavivirus ,Titer ,Infectious Diseases ,Liver ,Cell culture ,Toxicity ,Injections, Intraperitoneal - Abstract
Objectives: To determine the antiviral activity of phosphorodiamidate morpholino oligomers (PMO) and peptide-conjugated PMO (PPMO) in AG129 mice infected with dengue 2 virus (DENV-2). Methods: Antisense PMO and PPMO were designed against the 5 0 terminal region (5 0 SL) or the 3 0 -cyclization sequence region (3 0 CS) of DENV genomic RNA and administered to AG129 mice before and/or after infection with DENV-2. In addition, cell culture evaluations designed to determine optimum PPMO length, and pharmacokinetic and toxicity analysis of PPMO were also carried out. Results: Mock-treated AG129 mice lived for 9–17 days following intraperitoneal (ip) infection with 10 4 –10 6 pfu of DENV-2 (strain New Guinea C). Intraperitoneal administration of 5 0 SL or 3 0 CS PPMO before and after DENV infection produced an increase in the average survival time of up to 8 days. Animals receiving only post-infection PPMO treatment did not benefit significantly. Cell culture studies showed that PPMO of 22–24 bases long produced substantially higher DENV titre reductions than did PPMO that were either shorter or longer. Pharmacokinetic and toxicology analysis with noninfected animals showed that nine consecutive once-daily ip treatments of 10 mg/kg PPMO resulted in high concentrations of PPMO in the liver and caused little impact on overall health. Conclusions: The data indicate that PPMO had considerable antiviral efficacy against DENV-2 in the AG129 mouse model and that PPMO treatment early in the course of an infection was critical to extending the survival times of DENV-2-infected mice in the AG129 model system.
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- 2008
14. Pharmacokinetics, Biodistribution, Stability and Toxicity of a Cell-Penetrating Peptide−Morpholino Oligomer Conjugate
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Hong M. Moulton, Jed N. Hassinger, Derek S. Youngblood, Patrick L. Iversen, Muralimohan T. Reddy, Melissa L. Cate, Tom Whitehead, and Adams Amantana
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Male ,Biodistribution ,Morpholino ,Morpholines ,Biomedical Engineering ,Pharmaceutical Science ,Bioengineering ,Peptide ,Pharmacology ,Arginine ,Kidney ,Oligomer ,Blood Urea Nitrogen ,Rats, Sprague-Dawley ,chemistry.chemical_compound ,Pharmacokinetics ,In vivo ,polycyclic compounds ,Animals ,Tissue Distribution ,chemistry.chemical_classification ,Volume of distribution ,musculoskeletal, neural, and ocular physiology ,Cell Membrane ,Organic Chemistry ,Rats ,body regions ,nervous system ,chemistry ,Biochemistry ,Creatinine ,Peptides ,psychological phenomena and processes ,Biotechnology ,Conjugate - Abstract
Conjugation of arginine-rich cell-penetrating peptide (CPP) to phosphorodiamidate morpholino oligomers (PMO) has been shown to enhance cytosolic and nuclear delivery of PMO. However, the in vivo disposition of CPP-PMO is largely unknown. In this study, we investigated the pharmacokinetics, tissue distribution, stability, and safety profile of an anti-c-myc PMO conjugated to the CPP, (RXR)4 (X = 6-aminohexanoic acid) in rats.The PMO and CPP-PMO were administrated intravenously into rats. The concentrations of the PMO and the CPP-PMO in plasma and tissues were monitored by HPLC. The stability of the CPP portion of the CPP-PMO conjugate in rat plasma and tissue lysates was determined by mass spectrometry. The safety profile of the CPP-PMO was assessed by body weight changes, serum chemistry, and animal behavior.CPP conjugation improved the kinetic behavior of PMO with a 2-fold increase in the estimated elimination half-life, a 4-fold increase in volume of distribution, and increased area under the plasma concentration vs time curve. Consistent with the improved pharmacokinetic profile, conjugation to CPP increased the uptake of PMO in all tissues except brain, varied between organ type with greater uptake enhancement occurring in liver, spleen, and lungs. The CPP-PMO conjugate had greater tissue retention than the corresponding PMO. Mass spectrometry data indicated no observable degradation of the PMO portion, while there was identifiable degradation of the CPP portion. Time-dependent CPP degradation was observed in plasma and tissue lysates, with the degradation in plasma being more rapid. The pattern of degraded products differed between the plasma and lysates. Safety evaluation data showed that the CPP-PMO was well-tolerated at the dose of 15 mg/kg with no apparent signs of toxicity. In contrast, at the dose of 150 mg/kg, adverse events such as lethargy, weight loss, and elevated BUN (p0.01) and serum creatinine (p0.001) levels were recorded. Supplementation with free L-arginine ad libitum showed improved clearance of serum creatinine (p0.05) and BUN (p0.01) at the toxicological dose, suggesting that the CPP caused toxicity in kidney.This study demonstrates that conjugation of CPP to PMO enhances the PMO pharmacokinetic profile, tissue uptake, and subsequent retention. Therefore, when dosed ator = 15 mg/kg, CPP is a promising transporter for enhancing PMO delivery in therapeutic settings.
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- 2007
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15. Potent antimutagenic activity of white tea in comparison with green tea in the Salmonella assay
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Roderick H. Dashwood, Cynthia Provost, Gilberto Santana-Rios, Gayle A. Orner, Shiau-Yin Wu, and Adams Amantana
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Salmonella typhimurium ,Health, Toxicology and Mutagenesis ,Mutagen ,medicine.disease_cause ,Catechin ,chemistry.chemical_compound ,Quinoxaline ,Cytochrome P-450 Enzyme System ,Quinoxalines ,Genetics ,medicine ,Animals ,Potency ,Drug Interactions ,Cooking ,Food science ,Chromatography, High Pressure Liquid ,chemistry.chemical_classification ,Dose-Response Relationship, Drug ,Tea ,Mutagenicity Tests ,Quinoline ,Imidazoles ,food and beverages ,Antimutagenic Agents ,Rats ,Biochemistry ,chemistry ,Polyphenol ,Heterocyclic amine ,Microsomes, Liver ,Quinolines ,Oxidoreductases ,Caffeine ,Antimutagen ,Mutagens - Abstract
There is growing interest in the potential health benefits of tea, including the antimutagenic properties. Four varieties of white tea, which represent the least processed form of tea, were shown to have marked antimutagenic activity in the Salmonella assay, particularly in the presence of S9. The most active of these teas, Exotica China white tea, was significantly more effective than Premium green tea (Dragonwell special grade) against 2-amino-3-methylimidazo[4,5-f]quinoline (IQ) and four other heterocyclic amine mutagens, namely 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx), 2-amino-3,4,8-trimethyl-3H-imidazo[4,5-f]quinoxaline (4,8-DiMeIQx), 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP), and 3-amino-1-methyl-5H-pyrido[4,3-b]indole (Trp-P-2). Mechanism studies were performed using rat liver S9 in assays for methoxyresorufin O-demethylase (MROD), a marker for the enzyme cytochrome P4501A2 that activates heterocyclic amines, as well as Salmonella assays with the direct-acting mutagen 2-hydroxyamino-3-methylimidazo[4,5-f]quinoline (N-hydroxy-IQ). White tea at low concentrations in the assay inhibited MROD activity, and attenuated the mutagenic activity of N-hydroxy-IQ in the absence of S9. Nine of the major constituents found in green tea also were detected in white tea, including high levels of epigallocatechin-3-gallate (EGCG) and several other polyphenols. When these major constituents were mixed to produce "artificial" teas, according to their relative levels in white and green teas, the complete tea exhibited higher antimutagenic potency compared with the corresponding artificial tea. The results suggest that the greater inhibitory potency of white versus green tea in the Salmonella assay might be related to the relative levels of the nine major constituents, perhaps acting synergistically with other (minor) constituents, to inhibit mutagen activation as well as "scavenging" the reactive intermediate(s).
- Published
- 2001
- Full Text
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16. Pharmacokinetics and Interspecies Allometric Scaling of ST-246, an Oral Antiviral Therapeutic for Treatment of Orthopoxvirus Infection
- Author
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Robert Jordan, Kevin F. Jones, Jarasvech Chinsangaram, Yali Chen, Janet M. Leeds, Adams Amantana, Tove' C. Bolken, Dennis E. Hruby, and Shanthakumar R. Tyavanagimatt
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Adult ,Male ,Drugs and Devices ,Viral Diseases ,Science ,Cmax ,Administration, Oral ,Orthopoxvirus ,Poxviridae Infections ,Pharmacology ,Isoindoles ,Plasma volume ,Toxicology ,Microbiology ,Antiviral Agents ,Mice ,Model Organisms ,Dogs ,Pharmacokinetics ,Oral administration ,Virology ,Blood plasma ,Animals ,Humans ,Biology ,Multidisciplinary ,biology ,Body Weight ,Half-life ,Animal Models ,biology.organism_classification ,Antivirals ,Toxicokinetics ,Macaca fascicularis ,Infectious Diseases ,Area Under Curve ,Benzamides ,Medicine ,Female ,Allometry ,Rabbits ,Research Article ,Smallpox ,Half-Life - Abstract
Plasma pharmacokinetics of ST-246, smallpox therapeutic, was evaluated in mice, rabbits, monkeys and dogs following repeat oral administrations by gavage. The dog showed the lowest Tmax of 0.83 h and the monkey, the highest value of 3.25 h. A 2- to 4-fold greater dose-normalized Cmax was observed for the dog compared to the other species. The mouse showed the highest dose-normalized AUC, which was 2-fold greater than that for the rabbit and monkey both of which by approximation, recorded the lowest value. The Cl/F increased across species from 0.05 L/h for mouse to 42.52 L/h for dog. The mouse showed the lowest VD/F of 0.41 L and the monkey, the highest VD/F of 392.95 L. The calculated extraction ratios were 0.104, 0.363, 0.231 and 0.591 for mouse, rabbit, monkey and dog, respectively. The dog showed the lowest terminal half-life of 3.10 h and the monkey, the highest value of 9.94 h. The simple allometric human VD/F and MLP-corrected Cl/F were 2311.51 L and 51.35 L/h, respectively, with calculated human extraction ratio of 0.153 and terminal half-life of 31.20 h. Overall, a species-specific difference was observed for Cl/F with this parameter increasing across species from mouse to dog. The human MLP-corrected Cl/F, terminal half-life, extraction ratios were in close proximity to the observed estimates. In addition, the first-in-humans (FIH) dose of 485 mg, determined from the MLP-corrected allometry Cl/F, was well within the dose range of 400 mg and 600 mg administered in healthy adult human volunteers.
- Published
- 2013
17. ST-246 Antiviral Efficacy in a Nonhuman Primate Monkeypox Model: Determination of the Minimal Effective Dose and Human Dose Justification ▿
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John W. Huggins, Josh Shamblin, Jarasvech Chinsangaram, Shanthakumar R. Tyavanagimatt, Adams Amantana, Arthur J. Goff, Annie Frimm, Lisa E. Hensley, Wendy Johnson, Eric M. Mucker, Chelsea M. Byrd, Carly Wlazlowski, Robert Jordan, Tove' C. Bolken, Dennis E. Hruby, Michael L. Corrado, Nancy A. Twenhafel, and Jennifer Chapman
- Subjects
viruses ,Viremia ,Pharmacology ,Isoindoles ,Antiviral Agents ,Monkeypox ,medicine ,Animals ,Humans ,Pharmacology (medical) ,Orthopoxvirus ,Monkeypox virus ,biology ,Dose-Response Relationship, Drug ,Tecovirimat ,virus diseases ,medicine.disease ,biology.organism_classification ,Effective dose (pharmacology) ,Disease Models, Animal ,Macaca fascicularis ,Infectious Diseases ,Treatment Outcome ,Immunology ,Benzamides ,Viral disease ,Viral load - Abstract
Therapeutics for the treatment of pathogenic orthopoxvirus infections are being sought. In the absence of patients with disease, animal models of orthopoxvirus disease are essential for evaluation of the efficacies of antiviral drugs and establishment of the appropriate dose and duration of human therapy. Infection of nonhuman primates (NHP) by the intravenous injection of monkeypox virus has been used to evaluate a promising therapeutic drug candidate, ST-246. ST-246 administered at 3 days postinfection (which corresponds to the secondary viremia stage of disease) at four different doses (from 100 mg/kg of body weight down to 3 mg/kg) once a day for 14 days was able to offer NHP 100% protection from a lethal infection with monkeypox virus and reduce the viral load and lesion formation. In NHP, the administration of ST-246 at a dose of 10 mg/kg/day for 14 days resulted in levels of blood exposure comparable to the levels attained in humans administered 400 mg in the fed state. These results suggest that administration of an oral dosage of 400 mg once daily for 14 days will be effective for the prevention or treatment of smallpox or monkeypox infections in humans.
- Published
- 2009
18. Pharmacokinetics and biodistribution of phosphorodiamidate morpholino antisense oligomers
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Adams Amantana and Patrick L. Iversen
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Pharmacology ,Biodistribution ,Morpholino ,Chemistry ,Oligonucleotide ,Morpholines ,Translation (biology) ,Oligonucleotides, Antisense ,Morpholinos ,Drug Delivery Systems ,Pharmacokinetics ,Drug Discovery ,RNA splicing ,Gene expression ,Humans ,Tissue Distribution ,Gene - Abstract
The concept of using antisense oligonucleotides to interfere with gene expression offers a new therapeutic strategy for the treatment of diseases resulting from overexpression or dysfunction of certain genes. Phosphorodiamidate morpholino oligomers (PMOs) represent a neutral class of antisense agents that interfere with target gene expression either by binding and sterically blocking the assembly of translation machinery, resulting in inhibition of translation, or by altering splicing of pre-mRNA. Studies in animal models and human clinical trials have demonstrated a high degree of functional bioavailability in several target organs. Preclinical and clinical studies have shown that PMOs demonstrate improved efficacy, excellent kinetic behavior, biological stability, and a good safety profile. We conclude from the emerging data that PMOs display advantageous pharmaceutical properties in comparison with other antisense strategies.
- Published
- 2005
19. X-linked inhibitor of apoptosis protein inhibition induces apoptosis and enhances chemotherapy sensitivity in human prostate cancer cells
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Adams, Amantana, Carla A, London, Patrick L, Iversen, and Gayathri R, Devi
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Male ,Membrane Glycoproteins ,Caspase 3 ,Tumor Necrosis Factor-alpha ,Morpholines ,Prostatic Neoplasms ,Proteins ,Apoptosis ,X-Linked Inhibitor of Apoptosis Protein ,Morpholinos ,Oligodeoxyribonucleotides, Antisense ,Enzyme Activation ,Gene Expression Regulation, Neoplastic ,TNF-Related Apoptosis-Inducing Ligand ,Drug Resistance, Neoplasm ,Caspases ,Cell Line, Tumor ,Humans ,Cisplatin ,Apoptosis Regulatory Proteins ,HeLa Cells - Abstract
Androgen-insensitive prostate cancer cells are highly resistant to several chemotherapeutic drugs and are characterized by the appearance of apoptosis-resistant cells. In this study, we identified the critical role of X-linked inhibitor of apoptosis protein (XIAP), a potent antiapoptotic factor, in conferring chemotherapy resistance in an androgen-insensitive DU145 human prostate cancer cell line. Results reveal that DU145 cells were highly resistant to cisplatin, but this resistance was overridden when the cells were treated for a prolonged time (96 hours) with cisplatin (IC(50) = 27.5 to 35.5 micromol/L). A decrease in levels of XIAP and Akt/phospho-Akt and an increase in caspase-3 activity were identified to be key factors in cisplatin sensitivity (40% to 55% decrease in cell viability) at later time points. In contrast, tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) treatment caused a 40% to 50% decrease in cell viability within 6 hours (IC(50) = 135 to 145 ng/mL). However, increasing concentrations or prolonged treatment with TRAIL did not change drug potency. A significant increase in caspase-3 activity was observed with TRAIL treatment with no apparent change in XIAP levels. Specific inhibition of XIAP expression using an antisense XIAP phosphorodiamidate morpholino oligomer induced apoptosis and increased caspase-3 activity. Combination of cisplatin with XIAP antisense potentiated cisplatin sensitivity by decreasing the IC(50) from200 micromol/L with cisplatin alone to 9 to 20 micromol/L and decreasing incubation time required for activity from 96 to 24 hours. Similarly, TRAIL in combination with XIAP antisense phosphorodiamidate morpholino oligomer enhanced TRAIL potency by 12- to 13-fold. In conclusion, abrogation of XIAP expression is essential for therapeutic apoptosis and enhanced chemotherapy sensitization in androgen-refractory prostate cancer cells.
- Published
- 2004
20. Effect of copper, zinc and cadmium on the promoter of selenoprotein W in glial and myoblast cells
- Author
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N.D. Costa, Philip D. Whanger, J.A. Butler, W.R. Vorachek, and Adams Amantana
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Response element ,Molecular Sequence Data ,chemistry.chemical_element ,Zinc ,Biochemistry ,Inorganic Chemistry ,Plasmid ,Multiple cloning site ,Animals ,Luciferase ,Selenoproteins ,Base Sequence ,Chemistry ,Muscles ,Proteins ,Transfection ,Selenoprotein W ,DNA ,Molecular biology ,Rats ,Cell culture ,Neuroglia ,Copper ,Cadmium - Abstract
Rat selenoprotein W (SeW) promoter activity was investigated using different concentrations of cadmium, copper, and zinc. Two fragments (404 and 1265 bp) of the SeW promoter, containing a single metal response element (MRE), were ligated into the multiple cloning site of a pGL3-Basic reporter plasmid. The constructs were transfected into cultured C6 (rat glial) and L8 (myoblast) cells and promoter activity measured by means of luciferase reporter gene fused to the SeW promoter fragments in the reporter plasmid. With post-transfection exposure of these cell lines to these metals, copper and zinc, but not cadmium, significantly increased promoter activity of the unmutated 1265 bp (not 404 bp) construct (p
- Published
- 2002
21. Antimutagenic activity of selenium-enriched green tea toward the heterocyclic amine 2-amino-3-methylimidazo[4,5-f]quinoline
- Author
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Roderick H. Dashwood, Meirong Xu, Gilberto Santana-Rios, Judith A. Butler, Phil D. Whanger, and Adams Amantana
- Subjects
Endocrinology, Diabetes and Metabolism ,Clinical Biochemistry ,chemistry.chemical_element ,complex mixtures ,Biochemistry ,Catechin ,Inorganic Chemistry ,chemistry.chemical_compound ,Selenium ,Salmonella ,Animals ,Food science ,Selenium Compounds ,Chromatography, High Pressure Liquid ,chemistry.chemical_classification ,Tea ,Mutagenicity Tests ,Plant Extracts ,Biochemistry (medical) ,Quinoline ,food and beverages ,Antimutagenic Agents ,General Medicine ,Rats ,Sodium selenate ,Epicatechin gallate ,chemistry ,Liver ,Polyphenol ,Heterocyclic amine ,Quinolines ,Caffeine ,Mutagens - Abstract
Both selenium and green tea have been reported to exhibit antigenotoxic and cancer chemopreventive properties. We compared the antimutagenic activities of regular green tea and selenium-enriched green tea obtained from Hubei Province, China, toward the heterocyclic amine, 2-amino-3-methylimidazo[4,5-f]quinoline (IQ) in the Salmonella assay. Selenium-enriched green tea obtained by foliar application of selenite exhibited concentration-dependent inhibition of IQ-induced mutagenesis in the presence of rat liver S9 and was significantly more effective than regular green tea tested under the same conditions. Analytical studies revealed no major differences in the polyphenol or caffeine content between regular green tea and selenium-enriched green tea, but the latter tea contained approximately 60-fold higher concentrations of selenium compared with regular green tea. The only soluble form of selenium was identified as selenite. The antimutagenic effects of certain individual tea constituents, such as epicatechin gallate and catechin, were enhanced by the addition of selenite to the Salmonella assay. Sodium selenite, sodium selenate, seleno-DL-cysteine, seleno-L-methionine, and L-Se-methylselenocysteine were not antimutagenic toward IQ when tested alone, but augmented significantly the inhibitory potency of green tea. The results suggested an enhancing ("coantimutagenic") effect of selenium in combination with green tea in vitro, but in vivo studies are needed to assess whether there is a synergistic effect of tea and selenium to protect against heterocyclic amine-induced mutagenesis and carcinogenesis.
- Published
- 2002
22. Pharmacokinetics and Interspecies Allometric Scaling of ST-246, an Oral Antiviral Therapeutic for Treatment of Orthopoxvirus Infection
- Author
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Amantana, Adams, primary, Chen, Yali, additional, Tyavanagimatt, Shanthakumar R., additional, Jones, Kevin F., additional, Jordan, Robert, additional, Chinsangaram, Jarasvech, additional, Bolken, Tove′ C., additional, Leeds, Janet M., additional, and Hruby, Dennis E., additional
- Published
- 2013
- Full Text
- View/download PDF
23. Comparison of the Safety and Pharmacokinetics of ST-246® after IV Infusion or Oral Administration in Mice, Rabbits and Monkeys
- Author
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Chen, Yali, primary, Amantana, Adams, additional, Tyavanagimatt, Shanthakumar R., additional, Zima, Daniela, additional, Yan, X. Steven, additional, Kasi, Gopi, additional, Weeks, Morgan, additional, Stone, Melialani A., additional, Weimers, William C., additional, Samuel, Peter, additional, Tan, Ying, additional, Jones, Kevin F., additional, Lee, Daniel R., additional, Kickner, Shirley S., additional, Saville, Bradley M., additional, Lauzon, Martin, additional, McIntyre, Alan, additional, Honeychurch, Kady M., additional, Jordan, Robert, additional, Hruby, Dennis E., additional, and Leeds, Janet M., additional
- Published
- 2011
- Full Text
- View/download PDF
24. ST-246 Antiviral Efficacy in a Nonhuman Primate Monkeypox Model: Determination of the Minimal Effective Dose and Human Dose Justification
- Author
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Jordan, Robert, primary, Goff, Arthur, additional, Frimm, Annie, additional, Corrado, Michael L., additional, Hensley, Lisa E., additional, Byrd, Chelsea M., additional, Mucker, Eric, additional, Shamblin, Josh, additional, Bolken, Tove' C., additional, Wlazlowski, Carly, additional, Johnson, Wendy, additional, Chapman, Jennifer, additional, Twenhafel, Nancy, additional, Tyavanagimatt, Shanthakumar, additional, Amantana, Adams, additional, Chinsangaram, Jarasvech, additional, Hruby, Dennis E., additional, and Huggins, John, additional
- Published
- 2009
- Full Text
- View/download PDF
25. Pharmacokinetics, Biodistribution, Stability and Toxicity of a Cell-Penetrating Peptide−Morpholino Oligomer Conjugate
- Author
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Amantana, Adams, primary, Moulton, Hong M., additional, Cate, Melissa L., additional, Reddy, Muralimohan T., additional, Whitehead, Tom, additional, Hassinger, Jed N., additional, Youngblood, Derek S., additional, and Iversen, Patrick L., additional
- Published
- 2007
- Full Text
- View/download PDF
26. X-linked inhibitor of apoptosis protein inhibition induces apoptosis and enhances chemotherapy sensitivity in human prostate cancer cells
- Author
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Amantana, Adams, primary, London, Carla A., additional, Iversen, Patrick L., additional, and Devi, Gayathri R., additional
- Published
- 2004
- Full Text
- View/download PDF
27. Antimutagenic Activity of Selenium-Enriched Green Tea Toward the Heterocyclic Amine 2-Amino-3-methylimidazo[4,5-f]quinoline
- Author
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Whanger, Phil D., primary, Amantana, Adams, additional, Santana-Rios, Gilberto, additional, Butler, Judith A., additional, Xu, Meirong, additional, and Dashwood, Roderick H., additional
- Published
- 2002
- Full Text
- View/download PDF
28. Pharmacokinetics, Biodistribution, Stability and Toxicity of a Cell-Penetrating Peptide−Morpholino Oligomer Conjugate.
- Author
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Adams Amantana, Hong M. Moulton, Melissa L. Cate, Muralimohan T. Reddy, Tom Whitehead, Jed N. Hassinger, Derek S. Youngblood, and Patrick L. Iversen
- Published
- 2007
- Full Text
- View/download PDF
29. Treatment of AG129 mice with antisense morpholino oligomers increases survival time following challenge with dengue 2 virus.
- Author
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David A. Stein, Claire Y.-H. Huang, Shawn Silengo, Adams Amantana, Stacy Crumley, Robert E. Blouch, Patrick L. Iversen, Richard M. Kinney, Stein, David A, Huang, Claire Y-H, Silengo, Shawn, Amantana, Adams, Crumley, Stacy, Blouch, Robert E, Iversen, Patrick L, and Kinney, Richard M
- Subjects
GEL permeation chromatography ,CHROMATOGRAPHIC analysis ,SEPHAROSE ,RODENTS - Abstract
Objectives: To determine the antiviral activity of phosphorodiamidate morpholino oligomers (PMO) and peptide-conjugated PMO (PPMO) in AG129 mice infected with dengue 2 virus (DENV-2).Methods: Antisense PMO and PPMO were designed against the 5' terminal region (5'SL) or the 3'-cyclization sequence region (3'CS) of DENV genomic RNA and administered to AG129 mice before and/or after infection with DENV-2. In addition, cell culture evaluations designed to determine optimum PPMO length, and pharmacokinetic and toxicity analysis of PPMO were also carried out.Results: Mock-treated AG129 mice lived for 9-17 days following intraperitoneal (ip) infection with 10(4)-10(6) pfu of DENV-2 (strain New Guinea C). Intraperitoneal administration of 5'SL or 3'CS PPMO before and after DENV infection produced an increase in the average survival time of up to 8 days. Animals receiving only post-infection PPMO treatment did not benefit significantly. Cell culture studies showed that PPMO of 22-24 bases long produced substantially higher DENV titre reductions than did PPMO that were either shorter or longer. Pharmacokinetic and toxicology analysis with non-infected animals showed that nine consecutive once-daily ip treatments of 10 mg/kg PPMO resulted in high concentrations of PPMO in the liver and caused little impact on overall health.Conclusions: The data indicate that PPMO had considerable antiviral efficacy against DENV-2 in the AG129 mouse model and that PPMO treatment early in the course of an infection was critical to extending the survival times of DENV-2-infected mice in the AG129 model system. [ABSTRACT FROM AUTHOR]- Published
- 2008
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- View/download PDF
30. Effect of Primogeniture on Gender Patterns among Street Children in Ghana -A Case for Strain Theory.
- Author
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Amantana, Vivian
- Subjects
STREET children ,AMERICAN children ,CHILD abuse ,DRUG addiction - Abstract
While it has been established in countries such as the United States that some children leave home for the streets as result of parental abuse due in part to drug and alcohol use, it is evident that this is not entirely the case in other countries particularly the developing world. In fact, a fragile family support system due largely to a struggling economy in these developing countries such as Ghana has been established as the major contributor of children on the streets in these communities. This and other macro level factors have for a long time been the main focus of researchers. A review of literature has revealed very little information on the contribution of other factors directly related to the family tradition or structure in these communities. Therefore, the objective of this study is to use strain theory to establish the effect of primogeniture on the influx of children on to urban streets in Ghana. Furthermore this study will provide insight into the factors that tend to influence the gender composition of these street children. ..PAT.-Unpublished Manuscript [ABSTRACT FROM AUTHOR]
- Published
- 2008
31. Fields of Power, Forests of Discontent: Power, Conservation, and the State in Mexico.
- Author
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Amantana, Vivian
- Subjects
- *
CONSERVATION of natural resources , *NONFICTION - Abstract
The article presents a review of the book "Fields of Power, Forests of Discontent: Power, Conservation, and the State in Mexico," by Nora Haenn.
- Published
- 2006
32. Pharmacokinetics, biodistribution, stability and toxicity of a cell-penetrating peptide-morpholino oligomer conjugate.
- Author
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Amantana A, Moulton HM, Cate ML, Reddy MT, Whitehead T, Hassinger JN, Youngblood DS, and Iversen PL
- Subjects
- Animals, Arginine chemistry, Arginine pharmacology, Blood Urea Nitrogen, Cell Membrane metabolism, Creatinine metabolism, Kidney drug effects, Kidney metabolism, Male, Morpholines blood, Morpholines chemistry, Morpholines toxicity, Peptides blood, Peptides chemistry, Peptides toxicity, Rats, Rats, Sprague-Dawley, Tissue Distribution, Morpholines pharmacokinetics, Peptides pharmacokinetics
- Abstract
Objective: Conjugation of arginine-rich cell-penetrating peptide (CPP) to phosphorodiamidate morpholino oligomers (PMO) has been shown to enhance cytosolic and nuclear delivery of PMO. However, the in vivo disposition of CPP-PMO is largely unknown. In this study, we investigated the pharmacokinetics, tissue distribution, stability, and safety profile of an anti-c-myc PMO conjugated to the CPP, (RXR)4 (X = 6-aminohexanoic acid) in rats., Methods: The PMO and CPP-PMO were administrated intravenously into rats. The concentrations of the PMO and the CPP-PMO in plasma and tissues were monitored by HPLC. The stability of the CPP portion of the CPP-PMO conjugate in rat plasma and tissue lysates was determined by mass spectrometry. The safety profile of the CPP-PMO was assessed by body weight changes, serum chemistry, and animal behavior., Results: CPP conjugation improved the kinetic behavior of PMO with a 2-fold increase in the estimated elimination half-life, a 4-fold increase in volume of distribution, and increased area under the plasma concentration vs time curve. Consistent with the improved pharmacokinetic profile, conjugation to CPP increased the uptake of PMO in all tissues except brain, varied between organ type with greater uptake enhancement occurring in liver, spleen, and lungs. The CPP-PMO conjugate had greater tissue retention than the corresponding PMO. Mass spectrometry data indicated no observable degradation of the PMO portion, while there was identifiable degradation of the CPP portion. Time-dependent CPP degradation was observed in plasma and tissue lysates, with the degradation in plasma being more rapid. The pattern of degraded products differed between the plasma and lysates. Safety evaluation data showed that the CPP-PMO was well-tolerated at the dose of 15 mg/kg with no apparent signs of toxicity. In contrast, at the dose of 150 mg/kg, adverse events such as lethargy, weight loss, and elevated BUN (p < 0.01) and serum creatinine (p < 0.001) levels were recorded. Supplementation with free L-arginine ad libitum showed improved clearance of serum creatinine (p < 0.05) and BUN (p < 0.01) at the toxicological dose, suggesting that the CPP caused toxicity in kidney., Conclusion: This study demonstrates that conjugation of CPP to PMO enhances the PMO pharmacokinetic profile, tissue uptake, and subsequent retention. Therefore, when dosed at < or = 15 mg/kg, CPP is a promising transporter for enhancing PMO delivery in therapeutic settings.
- Published
- 2007
- Full Text
- View/download PDF
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