1
|
Abstract
The opioid crisis in the United States is primarily driven by the highly potent synthetic opioid fentanyl leading to >70,000 overdose deaths annually; thus, new therapies for fentanyl overdose are urgently needed. Here, we present the first clinic-ready, fully human monoclonal antibody CSX-1004 with picomolar affinity for fentanyl and related analogs. In mice CSX-1004 reverses fentanyl antinociception and the intractable respiratory depression caused by the ultrapotent opioid carfentanil. Moreover, toxicokinetic evaluation in a repeat-dose rat study and human tissue cross-reactivity study reveals a favorable pharmacokinetic profile of CSX-1004 with no safety-related issues. Using a highly translational non-human primate (NHP) model of respiratory depression, we demonstrate CSX-1004-mediated protection from repeated fentanyl challenges for 3-4 weeks. Furthermore, treatment with CSX-1004 produces up to a 15-fold potency reduction of fentanyl in NHP respiration, antinociception and operant responding assays without affecting non-fentanyl opioids like oxycodone. Taken together, our data establish the feasibility of CSX-1004 as a promising candidate medication for preventing and reversing fentanyl-induced overdose.
Collapse
Affiliation(s)
| | - Emily L Burke
- Department of Psychiatry, Harvard Medical School, Boston, MA, USA
- Behavioral Biology Program, Integrative Neurochemistry Laboratory, McLean Hospital, Belmont, MA, USA
| | | | - Rajeev I Desai
- Department of Psychiatry, Harvard Medical School, Boston, MA, USA
- Behavioral Biology Program, Integrative Neurochemistry Laboratory, McLean Hospital, Belmont, MA, USA
| |
Collapse
|
2
|
Eubanks LM, Blake S, Natori Y, Ellis B, Bremer PT, Janda KD. A Highly Efficacious Carfentanil Vaccine That Blunts Opioid-Induced Antinociception and Respiratory Depression. ACS Chem Biol 2021; 16:277-282. [PMID: 33533592 DOI: 10.1021/acschembio.1c00026] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The opioid epidemic remains a dire public health crisis with millions of people currently suffering from opioid use disorder (OUD) and tens of thousands dying each year. Synthetic opioids are most responsible for the crisis because of their extreme potency and ease of manufacture. Carfentanil for example has an estimated potency 10,000 times greater than morphine and thus is highly dangerous for human use. Herein, we report two synthetic opioid vaccines that elicited high-affinity antibodies against carfentanil and fentanyl with cross-reactivity to other synthetic opioids in mice and offered protection against opioid-induced respiratory depression, the primary cause of overdose deaths. These vaccines also successfully diminished drug biodistribution to the brain and shielded against opioid analgesic effects. Collectively, these findings provide new insights into the development of immunotherapeutic strategies aimed at opioid abuse and overdose.
Collapse
Affiliation(s)
- Lisa M. Eubanks
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, La Jolla, California 92037, United States
| | - Steven Blake
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, La Jolla, California 92037, United States
| | - Yoshihiro Natori
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, La Jolla, California 92037, United States
| | - Beverly Ellis
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, La Jolla, California 92037, United States
| | - Paul T. Bremer
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, La Jolla, California 92037, United States
| | - Kim D. Janda
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, La Jolla, California 92037, United States
| |
Collapse
|
3
|
Blake S, Bremer PT, Zhou B, Petrovsky N, Smith LC, Hwang CS, Janda KD. Developing Translational Vaccines against Heroin and Fentanyl through Investigation of Adjuvants and Stability. Mol Pharm 2021; 18:228-235. [PMID: 33301675 PMCID: PMC9946458 DOI: 10.1021/acs.molpharmaceut.0c00837] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The nearly insurmountable adversity that accompanies opioid use disorder (OUD) creates life-altering complications for opioid users. To worsen matters, existing small-molecule drugs continue to inadequately address OUD due to their engagement of the opioid receptor, which can leave the user to deal with side effects and financial hardships from their repeated use. An alternative therapeutic approach utilizes endogenously generated antibodies through active vaccination to reduce the effect of opioids without modulating the opioid receptor. Here, we explore different adjuvants and storage conditions to improve opioid vaccine efficacy and shelf life. Our results revealed that inulin-based formulations (Advax) containing a CpG oligodeoxynucleotide (ODN) acted as effective adjuvants when combined with a heroin conjugate: immunized mice showed excellent recovery from heroin-induced antinociception accompanied by high titer, high opioid affinity serum antibodies similar to the immunopotentiating properties of traditional alum-based adjuvants. Moreover, nonhuman primates vaccinated with a heroin/fentanyl combination vaccine demonstrated potent antibody responses against opioids when formulated with both inulin and alum adjuvants. Finally, storing a freeze-dried opioid vaccine formulation maintained efficacy for up 1 year at room temperature. The results from our studies represent an advance toward a clinically feasible opioid vaccine.
Collapse
Affiliation(s)
- Steven Blake
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Paul T. Bremer
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States,Cessation Therapeutics, LLC, 3031 Tisch Way, San Jose, California 95128, United States
| | - Bin Zhou
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Nikolai Petrovsky
- Flinders Medical Centre, Flinders University, GPO Box 2100, Adelaide 5001, South Australia, Australia,Vaxine Pty Ltd, 11 Walkley Avenue, Warradale 5046, South Australia, Australia
| | - Lauren C. Smith
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Candy S. Hwang
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Kim D. Janda
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States,Corresponding Author: Kim D. Janda - The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States. Phone: (858), 785-2515. Fax: (858) 784-2595. .
| |
Collapse
|
4
|
Townsend EA, Bremer PT, Jacob NT, Negus SS, Janda KD, Banks ML. A synthetic opioid vaccine attenuates fentanyl-vs-food choice in male and female rhesus monkeys. Drug Alcohol Depend 2021; 218:108348. [PMID: 33268227 PMCID: PMC8224470 DOI: 10.1016/j.drugalcdep.2020.108348] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [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: 08/26/2020] [Revised: 09/24/2020] [Accepted: 09/24/2020] [Indexed: 12/18/2022]
Abstract
AIM Opioid-targeted vaccines are under consideration as candidate Opioid Use Disorder medications. We recently reported that a fentanyl-targeted vaccine produced a robust and long-lasting attenuation of fentanyl-vs-food choice in rats. In the current study, we evaluated an optimized fentanyl-targeted vaccine in rhesus monkeys to determine whether vaccine effectiveness to attenuate fentanyl choice translated to a species with greater phylogenetic similarity to humans. METHODS Adult male (2) and female (3) rhesus monkeys were trained to respond under a concurrent schedule of food (1 g pellets) and intravenous fentanyl (0, 0.032-1 μg/kg/injection) reinforcement during daily 2 h sessions. Fentanyl choice dose-effect functions were determined daily and 7-day buprenorphine treatments (0.0032-0.032 mg/kg/h IV; n = 4-5) were determined for comparison to vaccine effects. Subsequently, a fentanyl-CRM197 conjugate vaccine was administered at week 0, 3, 8, 15 over a 29-week experimental period during which fentanyl choice dose-effect functions continued to be determined daily. RESULTS Buprenorphine significantly decreased fentanyl choice and reciprocally increased food choice. Vaccination eliminated fentanyl choice and increased food choice in four-of-the-five monkeys. A transient and less robust vaccine effect was observed in the fifth monkey. Fentanyl-specific antibody concentrations peaked after the third vaccination to approximately 50 μg/mL while anti-fentanyl antibody affinity increased to a sustained low nanomolar level. CONCLUSION These results translate fentanyl vaccine effectiveness from rats to rhesus monkeys to decrease fentanyl-vs-food choice, albeit with greater individual differences observed in monkeys. These results support the potential and further clinical evaluation of this fentanyl-targeted vaccine as a candidate Opioid Use Disorder medication.
Collapse
Affiliation(s)
- E. Andrew Townsend
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA, corresponding author: (EAT) or (KDJ)
| | - Paul T. Bremer
- Cessation Therapeutics, San Jose, CA 95128, USA,Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | | | - S. Stevens Negus
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
| | - Kim D. Janda
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA., corresponding author: (EAT) or (KDJ)
| | - Matthew L. Banks
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
| |
Collapse
|
5
|
Belz TF, Bremer PT, Zhou B, Blake S, Ellis B, Eubanks LM, Janda KD. Sulfonate-isosteric replacement examined within heroin-hapten vaccine design. Bioorg Med Chem Lett 2020; 30:127388. [PMID: 32738981 PMCID: PMC7398700 DOI: 10.1016/j.bmcl.2020.127388] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 06/27/2020] [Accepted: 06/30/2020] [Indexed: 10/23/2022]
Abstract
Heroin overdose and addiction remain significant health and economic burdens in the world today costing billions of dollars annually. Moreover, only limited pharmacotherapeutic options are available for treatment of heroin addiction. In our efforts to combat the public health threat posed by heroin addiction, we have developed vaccines against heroin. To expand upon our existing heroin-vaccine arsenal, we synthesized new aryl and alkyl sulfonate ester haptens; namely aryl-mono-sulfonate (HMsAc) and Aryl/alkyl-di-sulfonate (H(Ds)2) as carboxyl-isosteres of heroin then compared them to our model heroin-hapten (HAc) through vaccination studies. Heroin haptens were conjugated to the carrier protein CRM197 and the resulting CRM-immunoconjugates were used to vaccinate Swiss Webster mice following an established immunization protocol. Binding studies revealed that the highest affinity anti-heroin antibodies were generated by the HMsAc vaccine followed by the HAc and H(Ds)2 vaccines, respectively (HMsAc > HAc≫HDs2). However, neither the HMsAc nor H(Ds)2 vaccines were able to generate high affinity antibodies to the psychoactive metabolite 6-acetyl morphine (6-AM), in comparison to the HAc vaccine. Blood brain bio-distribution studies supported these binding results with vaccine efficiency following the trend HAc > HMsAc ≫ H(Ds)2 The work described herein provides insight into the use of hapten-isosteric replacement in vaccine drug design.
Collapse
Affiliation(s)
- Tyson F Belz
- Department of Chemistry, Department of Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Paul T Bremer
- Cessation Therapeutics LLC, 3031 Tisch Way Ste 505, San Jose, CA 95128, United States
| | - Bin Zhou
- Department of Chemistry, Department of Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Steven Blake
- Department of Chemistry, Department of Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Beverly Ellis
- Department of Chemistry, Department of Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Lisa M Eubanks
- Department of Chemistry, Department of Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Kim D Janda
- Department of Chemistry, Department of Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States.
| |
Collapse
|
6
|
Abstract
The United States is in the midst of an unprecedented epidemic of opioid substance use disorder, and while pharmacotherapies including opioid agonists and antagonists have shown success, they can be inadequate and frequently result in high recidivism. With these challenges facing opioid use disorder treatments immunopharmacotherapy is being explored as an alternative therapy option and is based upon antibody-opioid sequestering to block brain entry. Development of a heroin vaccine has become a major research focal point; however, producing an efficient vaccine against heroin has been particularly challenging because of the need to generate not only a potent immune response but one against heroin and its multiple psychoactive molecules. In this study, we explored the consequence of regioselective deuteration of a heroin hapten and its impact upon the immune response against heroin and its psychoactive metabolites. Deuterium (HdAc) and cognate protium heroin (HAc) haptens were compared head to head in an inclusive vaccine study. Strikingly the HdAc vaccine granted greater efficacy in blunting heroin analgesia in murine behavioral models compared to the HAc vaccine. Binding studies confirmed that the HdAc vaccine elicited both greater quantities and equivalent or higher affinity antibodies toward heroin and 6-AM. Blood-brain biodistribution experiments corroborated these affinity tests. These findings suggest that regioselective hapten deuteration could be useful for the resurrection of previous drug of abuse vaccines that have met limited success in the past.
Collapse
Affiliation(s)
- Tyson F Belz
- Department of Chemistry, Department of Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Paul T Bremer
- Department of Chemistry, Department of Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States.,Cessation Therapeutics LLC, 3031 Tisch Way Ste 505, San Jose, California 95128, United States
| | - Bin Zhou
- Department of Chemistry, Department of Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Beverly Ellis
- Department of Chemistry, Department of Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Lisa M Eubanks
- Department of Chemistry, Department of Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Kim D Janda
- Department of Chemistry, Department of Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| |
Collapse
|
7
|
Townsend EA, Bremer PT, Faunce KE, Negus SS, Jaster AM, Robinson HL, Janda KD, Banks ML. Evaluation of a Dual Fentanyl/Heroin Vaccine on the Antinociceptive and Reinforcing Effects of a Fentanyl/Heroin Mixture in Male and Female Rats. ACS Chem Neurosci 2020; 11:1300-1310. [PMID: 32271538 DOI: 10.1021/acschemneuro.0c00064] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Opioid-targeted vaccines represent an emerging treatment strategy for opioid use disorder. To determine whether concurrent vaccination against two commonly abused opioids (fentanyl and heroin) would confer broader spectrum opioid coverage, the current study evaluated dual fentanyl/heroin conjugate vaccine effectiveness using a warm water tail-withdrawal and a fentanyl/heroin-vs-food choice procedure in male and female rats across a 105-day observation period. Vaccine administration generated titers of high-affinity antibodies to both fentanyl and heroin sufficient to decrease the antinociceptive potency of fentanyl (25-fold), heroin (4.6-fold), and a 1:27 fentanyl/heroin mixture (7.5-fold). Vaccination did not alter the antinociceptive potency of the structurally dissimilar opioid agonist methadone. For comparison, continuous treatment with a naltrexone dose (0.032 mg/kg/h) shown previously to produce clinically relevant plasma-naltrexone levels decreased the antinociceptive potency of fentanyl, heroin, and the 1:27 fentanyl/heroin mixture by approximately 20-fold. Naltrexone treatment also shifted the potency of 1:27 fentanyl/heroin mixture in a drug-vs-food choice self-administration procedure 4.3-fold. In contrast, vaccination did not attenuate 1:27 fentanyl/heroin mixture self-administration in the drug-vs-food choice procedure. These data demonstrate that a vaccine can simultaneously attenuate the thermal antinociceptive effects of two structurally dissimilar opioids. However, the vaccine did not attenuate fentanyl/heroin mixture self-administration, suggesting a greater magnitude of vaccine responsiveness is required to decrease opioid reinforcement relative to antinociception.
Collapse
Affiliation(s)
- E. Andrew Townsend
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - Paul T. Bremer
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, California 92037, United States
| | - Kaycee E. Faunce
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - S. Stevens Negus
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - Alaina M. Jaster
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - Hannah L. Robinson
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - Kim D. Janda
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, California 92037, United States
| | - Matthew L. Banks
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| |
Collapse
|
8
|
Schwienteck KL, Blake S, Bremer PT, Poklis JL, Townsend EA, Negus SS, Banks ML. Effectiveness and selectivity of a heroin conjugate vaccine to attenuate heroin, 6-acetylmorphine, and morphine antinociception in rats: Comparison with naltrexone. Drug Alcohol Depend 2019; 204:107501. [PMID: 31479865 PMCID: PMC6878171 DOI: 10.1016/j.drugalcdep.2019.06.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 06/09/2019] [Accepted: 06/10/2019] [Indexed: 01/05/2023]
Abstract
BACKGROUND One emerging strategy to address the opioid crisis includes opioid-targeted immunopharmacotherapies. This study compared effectiveness of a heroin-tetanus toxoid (TT) conjugate vaccine to antagonize heroin, 6-acetylmorphine (6-AM), morphine, and fentanyl antinociception in rats. METHODS Adult male and female Sprague Dawley rats received three doses of active or control vaccine at weeks 0, 2, and 4. Vaccine pharmacological selectivity was assessed by comparing opioid dose-effect curves in 50 °C warm-water tail-withdrawal procedure before and after active or control heroin-TT vaccine. Route of heroin administration [subcutaneous (SC) vs. intravenous [IV)] was also examined as a determinant of vaccine effectiveness. Continuous naltrexone treatment (0.0032-0.032 mg/kg/h) effects on heroin, 6-AM, and morphine antinociceptive potency were also determined as a benchmark for minimal vaccine effectiveness. RESULTS The heroin-TT vaccine decreased potency of SC heroin (5-fold), IV heroin (3-fold), and IV 6-AM (3-fold) for several weeks without affecting IV morphine or SC and IV fentanyl potency. The control vaccine did not alter potency of any opioid. Naltrexone dose-dependently decreased antinociceptive potency of SC heroin, and treatment with 0.01 mg/kg/h naltrexone produced similar, approximate 8-fold decreases in potencies of SC and IV heroin, IV 6-AM, and IV morphine. The combination of naltrexone and active vaccine was more effective than naltrexone alone to antagonize SC heroin but not IV heroin. CONCLUSIONS The heroin-TT vaccine formulation examined is less effective, but more selective, than chronic naltrexone to attenuate heroin antinociception in rats. Furthermore, these results provide an empirical framework for future preclinical opioid vaccine research to benchmark effectiveness against naltrexone.
Collapse
Affiliation(s)
- Kathryn L. Schwienteck
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
| | - Steven Blake
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Paul T. Bremer
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Justin L. Poklis
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
| | - E. Andrew Townsend
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
| | - S. Stevens Negus
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
| | - Matthew L. Banks
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA 23298 USA
| |
Collapse
|
9
|
Tenney RD, Blake S, Bremer PT, Zhou B, Hwang CS, Poklis JL, Janda KD, Banks ML. Vaccine blunts fentanyl potency in male rhesus monkeys. Neuropharmacology 2019; 158:107730. [PMID: 31369740 PMCID: PMC6745253 DOI: 10.1016/j.neuropharm.2019.107730] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [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: 03/16/2019] [Revised: 07/25/2019] [Accepted: 07/28/2019] [Indexed: 11/30/2022]
Abstract
One proposed factor contributing to the increased frequency of opioid overdose deaths is the emergence of novel synthetic opioids, including illicit fentanyl and fentanyl analogues. A treatment strategy currently under development to address the ongoing opioid crisis is immunopharmacotherapies or opioid-targeted vaccines. The present study determined the effectiveness and selectivity of a fentanyl-tetanus toxoid conjugate vaccine to alter the behavioral effects of fentanyl and a structurally dissimilar mu-opioid agonist oxycodone in male rhesus monkeys (n = 3-4). Fentanyl and oxycodone produced dose-dependent suppression of behavior in an assay of schedule-controlled responding and antinociception in an assay of thermal nociception (50 °C). Acute naltrexone (0.032 mg/kg) produced an approximate 10-fold potency shift for fentanyl to decrease operant responding. The fentanyl vaccine was administered at weeks 0, 2, 4, 9, 19, and 44 and fentanyl or oxycodone potencies in both behavioral assays were redetermined over the course of 49 weeks. The vaccine significantly and selectively shifted fentanyl potency at least 10-fold in both assays at several time points over the entire experimental period. Mid-point titer levels correlated with fentanyl antinociceptive potency shifts. Antibody affinity for fentanyl as measured by a competitive binding assay improved over time to approximately 3-4 nM. The fentanyl vaccine also increased fentanyl plasma levels approximately 6-fold consistent with the hypothesis that the vaccine sequesters fentanyl in the blood. Overall, these results support the continued development and evaluation of this fentanyl vaccine in humans to address the ongoing opioid crisis.
Collapse
Affiliation(s)
- Rebekah D Tenney
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA, 23298, USA
| | - Steven Blake
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Paul T Bremer
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Bin Zhou
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Candy S Hwang
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Justin L Poklis
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA, 23298, USA
| | - Kim D Janda
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA.
| | - Matthew L Banks
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA, 23298, USA.
| |
Collapse
|
10
|
Townsend EA, Blake S, Faunce KE, Hwang CS, Natori Y, Zhou B, Bremer PT, Janda KD, Banks ML. Conjugate vaccine produces long-lasting attenuation of fentanyl vs. food choice and blocks expression of opioid withdrawal-induced increases in fentanyl choice in rats. Neuropsychopharmacology 2019; 44:1681-1689. [PMID: 31043682 PMCID: PMC6784909 DOI: 10.1038/s41386-019-0385-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 02/19/2019] [Accepted: 04/01/2019] [Indexed: 12/31/2022]
Abstract
The current opioid crisis remains a significant public health issue and there is a critical need for biomedical research to develop effective and easily deployable candidate treatments. One emerging treatment strategy for opioid use disorder includes immunopharmacotherapies or opioid-targeted vaccines. The present study determined the effectiveness of a fentanyl-tetanus toxoid conjugate vaccine to alter fentanyl self-administration using a fentanyl-vs.-food choice procedure in male and female rats under three experimental conditions. For comparison, continuous 7-day naltrexone (0.01-0.1 mg/kg/h) and 7-day clonidine (3.2-10 μg/kg/h) treatment effects were also determined on fentanyl-vs.-food choice. Male and female rats responded for concurrently available 18% diluted Ensure® (liquid food) and fentanyl (0-10 μg/kg/infusion) infusions during daily sessions. Under baseline and saline treatment conditions, fentanyl maintained a dose-dependent increase in fentanyl-vs.-food choice. First, fentanyl vaccine administration significantly blunted fentanyl reinforcement and increased food reinforcement for 15 weeks in non-opioid dependent rats. Second, surmountability experiments by increasing the unit fentanyl dose available during the self-administration session 10-fold empirically determined that the fentanyl vaccine produced an approximate 22-fold potency shift in fentanyl-vs.-food choice that was as effective as the clinically approved treatment naltrexone. Clonidine treatment significantly increased fentanyl-vs.-food choice. Lastly, fentanyl vaccine administration prevented the expression of withdrawal-associated increases in fentanyl-vs.-food choice following introduction of extended 12 h fentanyl access sessions. Overall, these results support the potential and further consideration of immunopharmacotherapies as candidate treatments to address the current opioid crisis.
Collapse
Affiliation(s)
- E Andrew Townsend
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA, 23298, USA
| | - Steven Blake
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Kaycee E Faunce
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA, 23298, USA
| | - Candy S Hwang
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
- Department of Chemistry, Southern Connecticut State University, 501 Crescent St, New Haven, CT, 06515, USA
| | - Yoshihiro Natori
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
- Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Komatsushima 4-4-1, Aoba-ku, Sendai, 981-8558, Japan
| | - Bin Zhou
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Paul T Bremer
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Kim D Janda
- Departments of Chemistry and Immunology and Microbial Science, Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA.
| | - Matthew L Banks
- Department of Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, VA, 23298, USA.
| |
Collapse
|
11
|
Smith LC, Bremer PT, Hwang CS, Zhou B, Ellis B, Hixon MS, Janda KD. Monoclonal Antibodies for Combating Synthetic Opioid Intoxication. J Am Chem Soc 2019; 141:10489-10503. [PMID: 31187995 DOI: 10.1021/jacs.9b04872] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Opioid abuse in the United States has been declared a national crisis and is exacerbated by an inexpensive, readily available, and illicit supply of synthetic opioids. Specifically, fentanyl and related analogues such as carfentanil pose a significant danger to opioid users due to their high potency and rapid acting depression of respiration. In recent years these synthetic opioids have become the number one cause of drug-related deaths. In our research efforts to combat the public health threat posed by synthetic opioids, we have developed monoclonal antibodies (mAbs) against the fentanyl class of drugs. The mAbs were generated in hybridomas derived from mice vaccinated with a fentanyl conjugate vaccine. Guided by a surface plasmon resonance (SPR) binding assay, we selected six hybridomas that produced mAbs with 10-11 M binding affinity for fentanyl, yet broad cross-reactivity with related fentanyl analogues. In mouse antinociception models, our lead mAb (6A4) could blunt the effects of both fentanyl and carfentanil in a dose-responsive manner. Additionally, mice pretreated with 6A4 displayed enhanced survival when subjected to fentanyl above LD50 doses. Pharmacokinetic analysis revealed that the antibody sequesters large amounts of these drugs in the blood, thus reducing drug biodistribution to the brain and other tissue. Lastly, the 6A4 mAb could effectively reverse fentanyl/carfentanil-induced antinociception comparable to the opioid antagonist naloxone, the standard of care drug for treating opioid overdose. While naloxone is known for its short half-life, we found the half-life of 6A4 to be approximately 6 days in mice, thus monoclonal antibodies could theoretically be useful in preventing renarcotization events in which opioid intoxication recurs following quick metabolism of naloxone. Our results as a whole demonstrate that monoclonal antibodies could be a desirable treatment modality for synthetic opioid overdose and possibly opioid use disorder.
Collapse
Affiliation(s)
- Lauren C Smith
- Departments of Chemistry, Immunology and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 N Torrey Pines Road , La Jolla , California 92037 , United States
| | - Paul T Bremer
- Departments of Chemistry, Immunology and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 N Torrey Pines Road , La Jolla , California 92037 , United States.,Cessation Therapeutics LLC , 3031 Tisch Way Ste 505 , San Jose , California 95128 , United States
| | - Candy S Hwang
- Departments of Chemistry, Immunology and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 N Torrey Pines Road , La Jolla , California 92037 , United States.,Department of Chemistry , Southern Connecticut State University , New Haven , Connecticut 06515 , United States
| | - Bin Zhou
- Departments of Chemistry, Immunology and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 N Torrey Pines Road , La Jolla , California 92037 , United States
| | - Beverly Ellis
- Departments of Chemistry, Immunology and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 N Torrey Pines Road , La Jolla , California 92037 , United States
| | - Mark S Hixon
- Departments of Chemistry, Immunology and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 N Torrey Pines Road , La Jolla , California 92037 , United States.,Mark S. Hixon Consulting LLC , 11273 Spitfire Road , San Diego , California 92126 , United States
| | - Kim D Janda
- Departments of Chemistry, Immunology and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 N Torrey Pines Road , La Jolla , California 92037 , United States
| |
Collapse
|
12
|
Hwang CS, Bremer PT, Wenthur CJ, Ho SO, Chiang S, Ellis B, Zhou B, Fujii G, Janda KD. Enhancing Efficacy and Stability of an Antiheroin Vaccine: Examination of Antinociception, Opioid Binding Profile, and Lethality. Mol Pharm 2018; 15:1062-1072. [PMID: 29420901 DOI: 10.1021/acs.molpharmaceut.7b00933] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In recent years, drug conjugate vaccines have shown promise as therapeutics for substance use disorder. As a means to improve the efficacy of a heroin conjugate vaccine, we systematically explored 20 vaccine formulations with varying combinations of carrier proteins and adjuvants. In regard to adjuvants, we explored a Toll-like receptor 9 (TLR9) agonist and a TLR3 agonist in the presence of alum. The TLR9 agonist was cytosine-guanine oligodeoxynucleotide 1826 (CpG ODN 1826), while the TLR3 agonist was virus-derived genomic doubled-stranded RNA (dsRNA). The vaccine formulations containing TLR3 or TLR9 agonist alone elicited strong antiheroin antibody titers and blockade of heroin-induced antinociception when formulated with alum; however, a combination of TLR3 and TLR9 adjuvants did not result in improved efficacy. Investigation of month-long stability of the two lead formulations revealed that the TLR9 but not the TLR3 formulation was stable when stored as a lyophilized solid or as a liquid over 30 days. Furthermore, mice immunized with the TLR9 + alum heroin vaccine gained significant protection from lethal heroin doses, suggesting that this vaccine formulation is suitable for mitigating the harmful effects of heroin, even following month-long storage at room temperature.
Collapse
Affiliation(s)
- Candy S Hwang
- Departments of Chemistry, Immunology, and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , La Jolla , California 92037 , United States
| | - Paul T Bremer
- Departments of Chemistry, Immunology, and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , La Jolla , California 92037 , United States
| | - Cody J Wenthur
- Departments of Chemistry, Immunology, and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , La Jolla , California 92037 , United States
| | - Sam On Ho
- Molecular Express, Inc., Rancho Dominguez , California 90220 , United States
| | - SuMing Chiang
- Molecular Express, Inc., Rancho Dominguez , California 90220 , United States
| | - Beverly Ellis
- Departments of Chemistry, Immunology, and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , La Jolla , California 92037 , United States
| | - Bin Zhou
- Departments of Chemistry, Immunology, and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , La Jolla , California 92037 , United States
| | - Gary Fujii
- Molecular Express, Inc., Rancho Dominguez , California 90220 , United States
| | - Kim D Janda
- Departments of Chemistry, Immunology, and Microbial Science, Skaggs Institute for Chemical Biology , The Scripps Research Institute , La Jolla , California 92037 , United States
| |
Collapse
|
13
|
Abstract
Substance use disorder, especially in relation to opioids such as heroin and fentanyl, is a significant public health issue and has intensified in recent years. As a result, substantial interest exists in developing therapeutics to counteract the effects of abused drugs. A promising universal strategy for antagonizing the pharmacology of virtually any drug involves the development of a conjugate vaccine, wherein a hapten structurally similar to the target drug is conjugated to an immunogenic carrier protein. When formulated with adjuvants and immunized, the immunoconjugate should elicit serum IgG antibodies with the ability to sequester the target drug to prevent its entry to the brain, thereby acting as an immunoantagonist. Despite the failures of first-generation conjugate vaccines against cocaine and nicotine in clinical trials, second-generation vaccines have shown dramatically improved performance in preclinical models, thus renewing the potential clinical utility of conjugate vaccines in curbing substance use disorder. This review explores the critical design elements of drug conjugate vaccines such as hapten structure, adjuvant formulation, bioconjugate chemistry, and carrier protein selection. Methods for evaluating these vaccines are discussed, and recent progress in vaccine development for each drug is summarized.
Collapse
Affiliation(s)
- Paul T Bremer
- Departments of Chemistry and Immunology, The Scripps Research Institute, La Jolla, California
| | - Kim D Janda
- Departments of Chemistry and Immunology, The Scripps Research Institute, La Jolla, California
| |
Collapse
|
14
|
Abstract
Heroin is a highly abused opioid and incurs a significant detriment to society worldwide. In an effort to expand the limited pharmacotherapy options for opioid use disorders, a heroin conjugate vaccine was developed through comprehensive evaluation of hapten structure, carrier protein, adjuvant and dosing. Immunization of mice with an optimized heroin-tetanus toxoid (TT) conjugate formulated with adjuvants alum and CpG oligodeoxynucleotide (ODN) generated heroin "immunoantagonism", reducing heroin potency by >15-fold. Moreover, the vaccine effects proved to be durable, persisting for over eight months. The lead vaccine was effective in rhesus monkeys, generating significant and sustained antidrug IgG titers in each subject. Characterization of both mouse and monkey antiheroin antibodies by surface plasmon resonance (SPR) revealed low nanomolar antiserum affinity for the key heroin metabolite, 6-acetylmorphine (6AM), with minimal cross reactivity to clinically used opioids. Following a series of heroin challenges over six months in vaccinated monkeys, drug-sequestering antibodies caused marked attenuation of heroin potency (>4-fold) in a schedule-controlled responding (SCR) behavioral assay. Overall, these preclinical results provide an empirical foundation supporting the further evaluation and potential clinical utility of an effective heroin vaccine in treating opioid use disorders.
Collapse
Affiliation(s)
- Paul T Bremer
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute , 10550 N Torrey Pines Road, La Jolla, California 92037, United States
| | - Joel E Schlosburg
- Department of Pharmacology and Toxicology, Virginia Commonwealth University , 410 N 12th Street, Richmond, Virginia 23298, United States
| | - Matthew L Banks
- Department of Pharmacology and Toxicology, Virginia Commonwealth University , 410 N 12th Street, Richmond, Virginia 23298, United States
| | - Floyd F Steele
- Department of Pharmacology and Toxicology, Virginia Commonwealth University , 410 N 12th Street, Richmond, Virginia 23298, United States
| | - Bin Zhou
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute , 10550 N Torrey Pines Road, La Jolla, California 92037, United States
| | - Justin L Poklis
- Department of Pharmacology and Toxicology, Virginia Commonwealth University , 410 N 12th Street, Richmond, Virginia 23298, United States
| | - Kim D Janda
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute , 10550 N Torrey Pines Road, La Jolla, California 92037, United States
| |
Collapse
|
15
|
Bremer PT, Pellett S, Carolan JP, Tepp WH, Eubanks LM, Allen KN, Johnson EA, Janda KD. Metal Ions Effectively Ablate the Action of Botulinum Neurotoxin A. J Am Chem Soc 2017; 139:7264-7272. [PMID: 28475321 PMCID: PMC5612488 DOI: 10.1021/jacs.7b01084] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Botulinum neurotoxin serotype A (BoNT/A) causes a debilitating and potentially fatal illness known as botulism. The toxin is also a bioterrorism threat, yet no pharmacological antagonist to counteract its effects has reached clinical approval. Existing strategies to negate BoNT/A intoxication have looked to antibodies, peptides, or organic small molecules as potential therapeutics. In this work, a departure from the traditional drug discovery mindset was pursued, in which the enzyme's susceptibility to metal ions was exploited. A screen of a series of metal salts showed marked inhibitory activity of group 11 and 12 metals against the BoNT/A light chain (LC) protease. Enzyme kinetics revealed that copper (I) and (II) cations displayed noncompetitive inhibition of the LC (Ki ≈ 1 μM), while mercury (II) cations were 10-fold more potent. Crystallographic and mutagenesis studies elucidated a key binding interaction between Cys165 on BoNT/A LC and the inhibitory metals. As potential copper prodrugs, ligand-copper complexes were examined in a cell-based model and were found to prevent BoNT/A cleavage of the endogenous protein substrate, SNAP-25, even at low μM concentrations of complexes. Further investigation of the complexes suggested a bioreductive mechanism causing intracellular release of copper, which directly inhibited the BoNT/A protease. In vivo experiments demonstrated that copper (II) dithiocarbamate and bis(thiosemicarbazone) complexes could delay BoNT/A-mediated lethality in a rodent model, indicating their potential for treating the harmful effects of BoNT/A intoxication. Our studies illustrate that metals can be therapeutically viable enzyme inhibitors; moreover, enzymes that share homology with BoNT LCs may be similarly targeted with metals.
Collapse
Affiliation(s)
- Paul T. Bremer
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Sabine Pellett
- Department of Bacteriology, University of Wisconsin, 1550 Linden Drive, Madison, Wisconsin 53706, USA
| | - James P. Carolan
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA
| | - William H. Tepp
- Department of Bacteriology, University of Wisconsin, 1550 Linden Drive, Madison, Wisconsin 53706, USA
| | - Lisa M. Eubanks
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Karen N. Allen
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA
| | - Eric A. Johnson
- Department of Bacteriology, University of Wisconsin, 1550 Linden Drive, Madison, Wisconsin 53706, USA
| | - Kim D. Janda
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| |
Collapse
|
16
|
Bremer PT, Adler M, Phung CH, Singh AK, Janda KD. Newly Designed Quinolinol Inhibitors Mitigate the Effects of Botulinum Neurotoxin A in Enzymatic, Cell-Based, and ex Vivo Assays. J Med Chem 2017; 60:338-348. [PMID: 27966961 DOI: 10.1021/acs.jmedchem.6b01393] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Botulinum neurotoxin A (BoNT/A) is one of the most deadly toxins and is the etiological agent of the potentially fatal condition, botulism. Herein, we investigated 8-hydroxyquinoline (quinolin-8-ol) as a potential inhibitor scaffold for preventing the deadly neurochemical effects of the toxin. Quinolinols are known chelators that can disrupt the BoNT/A metalloprotease zinc-containing active site, thus impeding its proteolysis of the endogenous protein substrate, synaptosomal-associated protein 25 (SNAP-25). By use of this information, the structure-activity relationship (SAR) of the quinolinol-5-sulfonamide scaffold was explored through preparation of a crude sulfonamide library and evaluation of the library in a BoNT/A LC enzymatic assay. Potency optimization of the sulfonamide hit compounds was undertaken as informed by docking studies, granting a lead compound with a submicromolar Ki. These quinolinol analogues demonstrated inhibitory activity in a cell-based model for SNAP-25 cleavage and an ex vivo assay for BoNT/A-mediated muscle paralysis.
Collapse
Affiliation(s)
- Paul T Bremer
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Michael Adler
- Neurobehavioral Toxicology Branch, Analytical Toxicology Division, U.S. Army Medical Research Institute of Chemical Defense , 2900 Ricketts Point Road, Aberdeen Proving Ground, Maryland 21010-5400, United States
| | - Cecilia H Phung
- Neurobehavioral Toxicology Branch, Analytical Toxicology Division, U.S. Army Medical Research Institute of Chemical Defense , 2900 Ricketts Point Road, Aberdeen Proving Ground, Maryland 21010-5400, United States
| | - Ajay K Singh
- Neurobehavioral Toxicology Branch, Analytical Toxicology Division, U.S. Army Medical Research Institute of Chemical Defense , 2900 Ricketts Point Road, Aberdeen Proving Ground, Maryland 21010-5400, United States
| | - Kim D Janda
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| |
Collapse
|
17
|
Nguyen JD, Bremer PT, Ducime A, Creehan KM, Kisby BR, Taffe MA, Janda KD. Active vaccination attenuates the psychostimulant effects of α-PVP and MDPV in rats. Neuropharmacology 2016; 116:1-8. [PMID: 27956054 DOI: 10.1016/j.neuropharm.2016.12.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [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: 04/11/2016] [Revised: 12/01/2016] [Accepted: 12/09/2016] [Indexed: 11/20/2022]
Abstract
Recreational use of substituted cathinones continues to be an emerging public health problem in the United States; cathinone derivatives α-pyrrolidinopentiophenone (α-PVP) and 3,4-methylenedioxypyrovalerone (MDPV), which have been linked to human fatalities and show high potential for abuse liability in animal models, are of particular concern. The objective of this study was to develop an immunotherapeutic strategy for attenuating the effects of α-PVP and MDPV in rats, using drug-conjugate vaccines created to generate antibodies with neutralizing capacity. Immunoconjugates (α-PVP-KLH and MDPV-KLH) or the control carrier protein, keyhole limpet hemocyanin (KLH), were administered to groups (N = 12) of male Sprague-Dawley rats on Weeks 0, 2 and 4. Groups were administered α-PVP or MDPV (0.0, 0.25, 0.5, 1.0, 5.0 mg/kg, i.p.) in acute drug challenges and tested for changes in wheel activity. Increased wheel activity produced by α-PVP or MDPV in the controls was attenuated in the α-PVP-KLH and MDPV-KLH vaccinated groups, respectively. Rectal temperature decreases produced by MDPV in the controls were reduced in duration in the MDPV-KLH vaccine group. A separate group (N = 19) was trained to intravenously self-administer α-PVP (0.05, 0.1 mg/kg/inf) and vaccinated with KLH or α-PVP-KLH, post-acquisition. Self-administration in α-PVP-KLH rats was initially higher than in the KLH rats but then significantly decreased following a final vaccine booster, unlike the stable intake of KLH rats. The data demonstrate that active vaccination provides functional protection against the effects of α-PVP and MDPV, in vivo, and recommend additional development of vaccines as potential therapeutics for mitigating the effects of designer cathinone derivatives.
Collapse
Affiliation(s)
| | - Paul T Bremer
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, La Jolla, CA, USA
| | - Alex Ducime
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, La Jolla, CA, USA
| | | | - Brent R Kisby
- Committee on the Neurobiology of Addictive Disorders, USA
| | | | - Kim D Janda
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, La Jolla, CA, USA
| |
Collapse
|
18
|
Abstract
In developing small-molecule inhibitors of botulinum neurotoxin serotype A light chain (BoNT/A LC), substituted picolinic acids were identified. Extensive investigation into the SAR of the picolinic acid scaffold revealed 5-(1-butyl-4-chloro-1H-indol-2-yl)picolinic acid (CBIP), which possessed low micromolar activity against BoNT/A. Kinetic and docking studies demonstrated binding of CBIP to the β-exosite: a largely unexplored site on the LC that holds therapeutic relevance for botulism treatment.
Collapse
Affiliation(s)
- Paul T Bremer
- Departments of Chemistry, Immunology and Microbial Sciences, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, 10550 N. Torrey Pines Rd, La Jolla, CA 92037, USA.
| | - Song Xue
- Departments of Chemistry, Immunology and Microbial Sciences, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, 10550 N. Torrey Pines Rd, La Jolla, CA 92037, USA.
| | - Kim D Janda
- Departments of Chemistry, Immunology and Microbial Sciences, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, 10550 N. Torrey Pines Rd, La Jolla, CA 92037, USA.
| |
Collapse
|
19
|
Abstract
Methamphetamine (MA) addiction is a serious public health problem, and current methods to abate addiction and relapse are currently ineffective for mitigating this growing global epidemic. Development of a vaccine targeting MA would provide a complementary strategy to existing behavioral therapies, but this has proven challenging. Herein, we describe optimization of both hapten design and formulation, identifying a vaccine that elicited a robust anti-MA immune response in mice, decreasing methamphetamine-induced locomotor activity.
Collapse
Affiliation(s)
- Karen C Collins
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM) and ‡Committee on Neurobiology of Addictive Disorders, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Joel E Schlosburg
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM) and ‡Committee on Neurobiology of Addictive Disorders, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Paul T Bremer
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM) and ‡Committee on Neurobiology of Addictive Disorders, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Kim D Janda
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM) and ‡Committee on Neurobiology of Addictive Disorders, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| |
Collapse
|
20
|
Bremer PT, Kimishima A, Schlosburg JE, Zhou B, Collins KC, Janda KD. Combatting Synthetic Designer Opioids: A Conjugate Vaccine Ablates Lethal Doses of Fentanyl Class Drugs. Angew Chem Int Ed Engl 2016; 55:3772-5. [PMID: 26879590 DOI: 10.1002/anie.201511654] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [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: 12/25/2015] [Revised: 01/22/2015] [Indexed: 11/08/2022]
Abstract
Fentanyl is an addictive prescription opioid that is over 80 times more potent than morphine. The synthetic nature of fentanyl has enabled the creation of dangerous "designer drug" analogues that escape toxicology screening, yet display comparable potency to the parent drug. Alarmingly, a large number of fatalities have been linked to overdose of fentanyl derivatives. Herein, we report an effective immunotherapy for reducing the psychoactive effects of fentanyl class drugs. A single conjugate vaccine was created that elicited high levels of antibodies with cross-reactivity for a wide panel of fentanyl analogues. Moreover, vaccinated mice gained significant protection from lethal fentanyl doses. Lastly, a surface plasmon resonance (SPR)-based technique was established enabling drug-specificity profiling of antibodies derived directly from serum. Our newly developed fentanyl vaccine and analytical methods may assist in the battle against synthetic opioid abuse.
Collapse
Affiliation(s)
- Paul T Bremer
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, 10550 N Torrey Pines Rd BCC-582, La Jolla, CA, 92037, USA
| | - Atsushi Kimishima
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, 10550 N Torrey Pines Rd BCC-582, La Jolla, CA, 92037, USA
| | - Joel E Schlosburg
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, 10550 N Torrey Pines Rd BCC-582, La Jolla, CA, 92037, USA
| | - Bin Zhou
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, 10550 N Torrey Pines Rd BCC-582, La Jolla, CA, 92037, USA
| | - Karen C Collins
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, 10550 N Torrey Pines Rd BCC-582, La Jolla, CA, 92037, USA
| | - Kim D Janda
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM), The Scripps Research Institute, 10550 N Torrey Pines Rd BCC-582, La Jolla, CA, 92037, USA.
| |
Collapse
|
21
|
Bremer PT, Kimishima A, Schlosburg JE, Zhou B, Collins KC, Janda KD. Combatting Synthetic Designer Opioids: A Conjugate Vaccine Ablates Lethal Doses of Fentanyl Class Drugs. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511654] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Paul T. Bremer
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM); The Scripps Research Institute; 10550 N Torrey Pines Rd BCC-582 La Jolla CA 92037 USA
| | - Atsushi Kimishima
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM); The Scripps Research Institute; 10550 N Torrey Pines Rd BCC-582 La Jolla CA 92037 USA
| | - Joel E. Schlosburg
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM); The Scripps Research Institute; 10550 N Torrey Pines Rd BCC-582 La Jolla CA 92037 USA
| | - Bin Zhou
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM); The Scripps Research Institute; 10550 N Torrey Pines Rd BCC-582 La Jolla CA 92037 USA
| | - Karen C. Collins
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM); The Scripps Research Institute; 10550 N Torrey Pines Rd BCC-582 La Jolla CA 92037 USA
| | - Kim D. Janda
- Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, Worm Institute for Research and Medicine (WIRM); The Scripps Research Institute; 10550 N Torrey Pines Rd BCC-582 La Jolla CA 92037 USA
| |
Collapse
|
22
|
Collins KC, Schlosburg JE, Lockner JW, Bremer PT, Ellis BA, Janda KD. Lipid tucaresol as an adjuvant for methamphetamine vaccine development. Chem Commun (Camb) 2014; 50:4079-81. [PMID: 24615284 DOI: 10.1039/c4cc00682h] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The immunopotentiator tucaresol was modified for incorporation into liposomes, where it was found to be a superior adjuvant to MPLA for vaccination against methamphetamine.
Collapse
Affiliation(s)
- K C Collins
- Departments of Chemistry, Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, Worm Institute of Research and Medicine (WIRM), The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
| | | | | | | | | | | |
Collapse
|
23
|
Bremer PT, Hixon MS, Janda KD. Benzoquinones as inhibitors of botulinum neurotoxin serotype A. Bioorg Med Chem 2014; 22:3971-81. [PMID: 24984937 DOI: 10.1016/j.bmc.2014.06.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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: 04/08/2014] [Revised: 05/31/2014] [Accepted: 06/02/2014] [Indexed: 02/06/2023]
Abstract
Although botulinum neurotoxin serotype A (BoNT/A) is known for its use in cosmetics, it causes a potentially fatal illness, botulism, and can be used as a bioterror weapon. Many compounds have been developed that inhibit the BoNTA zinc-metalloprotease light chain (LC), however, none of these inhibitors have advanced to clinical trials. In this study, a fragment-based approach was implemented to develop novel covalent inhibitors of BoNT/A LC. First, electrophilic fragments were screened against BoNT/A LC, and benzoquinone (BQ) derivatives were found to be active. In kinetic studies, BQ compounds acted as irreversible inhibitors that presumably covalently modify cysteine 165 of BoNT/A LC. Although most BQ derivatives were highly reactive toward glutathione in vitro, a few compounds such as natural product naphthazarin displayed low thiol reactivity and good BoNT/A inhibition. In order to increase the potency of the BQ fragment, computational docking studies were employed to elucidate a scaffold that could bind to sites adjacent to Cys165 while positioning a BQ fragment at Cys165 for covalent modification; 2-amino-N-arylacetamides met these criteria and when linked to BQ displayed at least a 20-fold increase in activity to low μM IC₅₀ values. Unlike BQ alone, the linked-BQ compounds demonstrated only weak irreversible inhibition and therefore acted mainly as non-covalent inhibitors. Further kinetic studies revealed a mutual exclusivity of BQ covalent inactivation and competitive inhibitor binding to sites adjacent to Cys165, refuting the viability of the current strategy for developing more potent irreversible BoNT/A inhibitors. The highlights of this study include the discovery of BQ compounds as irreversible BoNT/A inhibitors and the rational design of low μM IC50 competitive inhibitors that depend on the BQ moiety for activity.
Collapse
Affiliation(s)
- Paul T Bremer
- Departments of Chemistry and Immunology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Mark S Hixon
- Discovery Biology, Takeda San Diego, Inc., 10410 Science Center Drive, San Diego, CA 92121, USA
| | - Kim D Janda
- Departments of Chemistry and Immunology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
| |
Collapse
|
24
|
Abstract
![]()
Active immunization is an effective
means of blocking the pharmacodynamic
effects of drugs and holds promise as a treatment for heroin addiction.
Previously, we demonstrated the efficacy of our first-generation vaccine
in blocking heroin self-administration in rats, however, many vaccine
components can be modified to further improve performance. Herein
we examine the effects of varying heroin vaccine injection route and
adjuvant formulation. Mice immunized via subcutaneous (sc) injection
exhibited inferior anti-heroin titers compared to intraperitoneal
(ip) and sc/ip coadministration injection routes. Addition of TLR9
agonist cytosine-guanine oligodeoxynucleotide 1826 (CpG ODN 1826)
to the original alum adjuvant elicited superior antibody titers and
opioid affinities compared to alum alone. To thoroughly assess vaccine
efficacy, full dose–response curves were generated for heroin-induced
analgesia in both hot plate and tail immersion tests. Mice treated
with CpG ODN 1826 exhibited greatly shifted dose–response curves
(10–13-fold vs unvaccinated controls) while non-CpG ODN vaccine
groups did not exhibit the same robust effect (2–7-fold shift
for ip and combo, 2–3-fold shift for sc). Our results suggest
that CpG ODN 1826 is a highly potent adjuvant, and injection routes
should be considered for development of small molecule–protein
conjugate vaccines. Lastly, this study has established a new standard
for assessing drugs of abuse vaccines, wherein a full dose–response
curve should be performed in an appropriate behavioral task.
Collapse
Affiliation(s)
- Paul T Bremer
- Departments of Chemistry, Immunology, and Microbial Science, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | | | | | | |
Collapse
|
25
|
Abstract
We challenged the performance of our previous heroin vaccine with a similar vaccine containing a more hydrolytically stable hapten analogue and a Th1 adjuvant (CpG ODN). Our results indicate that the elements of our previous vaccine are essential for its anti-heroin potency, i.e., a chemically labile hapten and an exclusively Th2 humoral response elicited by alum. Such design elements are critical for producing next-generation heroin vaccines.
Collapse
Affiliation(s)
- Paul T Bremer
- Department of Chemistry, The Skaggs Institute for Chemical Biology, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | | |
Collapse
|
26
|
Chianese AR, Mo A, Lampland NL, Swartz RL, Bremer PT. Iridium Complexes of CCC-Pincer N-Heterocyclic Carbene Ligands: Synthesis and Catalytic C−H Functionalization. Organometallics 2010. [DOI: 10.1021/om100302g] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Anthony R. Chianese
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
| | - Allen Mo
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
| | - Nicole L. Lampland
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
| | - Raymond L. Swartz
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
| | - Paul T. Bremer
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
| |
Collapse
|
27
|
Chianese AR, Bremer PT, Wong C, Reynes RJ. Rigid, Sterically Diverse N-Heterocyclic Carbene-Pyridine Chelates: Synthesis, Mild Palladation, and Palladium-Catalyzed Allylic Substitution. Organometallics 2009. [DOI: 10.1021/om900554c] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [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)
- Anthony R. Chianese
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
| | - Paul T. Bremer
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
| | - Christina Wong
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
| | - Rae Julienne Reynes
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
| |
Collapse
|
28
|
Laney D, Bremer PT, Mascarenhas A, Miller P, Pascucci V. Understanding the structure of the turbulent mixing layer in hydrodynamic instabilities. IEEE Trans Vis Comput Graph 2006; 12:1053-60. [PMID: 17080834 DOI: 10.1109/tvcg.2006.186] [Citation(s) in RCA: 9] [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: 05/12/2023]
Abstract
When a heavy fluid is placed above a light fluid, tiny vertical perturbations in the interface create a characteristic structure of rising bubbles and falling spikes known as Rayleigh-Taylor instability. Rayleigh-Taylor instabilities have received much attention over the past half-century because of their importance in understanding many natural and man-made phenomena, ranging from the rate of formation of heavy elements in supernovae to the design of capsules for Inertial Confinement Fusion. We present a new approach to analyze Rayleigh-Taylor instabilities in which we extract a hierarchical segmentation of the mixing envelope surface to identify bubbles and analyze analogous segmentations of fields on the original interface plane. We compute meaningful statistical information that reveals the evolution of topological features and corroborates the observations made by scientists. We also use geometric tracking to follow the evolution of single bubbles and highlight merge/split events leading to the formation of the large and complex structures characteristic of the later stages. In particular we (i) Provide a formal definition of a bubble; (ii) Segment the envelope surface to identify bubbles; (iii) Provide a multi-scale analysis technique to produce statistical measures of bubble growth; (iv) Correlate bubble measurements with analysis of fields on the interface plane; (v) Track the evolution of individual bubbles over time. Our approach is based on the rigorous mathematical foundations of Morse theory and can be applied to a more general class of applications.
Collapse
Affiliation(s)
- D Laney
- Lawrence Livermore National Laboratory, USA.
| | | | | | | | | |
Collapse
|