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Stachulski AV, Rossignol JF, Pate S, Taujanskas J, Iggo JA, Aerts R, Pascal E, Piacentini S, La Frazia S, Santoro MG, van Vooren L, Sintubin L, Cooper M, Swift K, O’Neill PM. Thiazolide Prodrug Esters and Derived Peptides: Synthesis and Activity. ACS Bio Med Chem Au 2023; 3:327-334. [PMID: 37599793 PMCID: PMC10436260 DOI: 10.1021/acsbiomedchemau.2c00083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 08/22/2023]
Abstract
Amino acid ester prodrugs of the thiazolides, introduced to improve the pharmacokinetic parameters of the parent drugs, proved to be stable as their salts but were unstable at pH > 5. Although some of the instability was due to simple hydrolysis, we have found that the main end products of the degradation were peptides formed by rearrangement. These peptides were stable solids: they maintained significant antiviral activity, and in general, they showed improved pharmacokinetics (better solubility and reduced clearance) compared to the parent thiazolides. We describe the preparation and evaluation of these peptides.
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Affiliation(s)
- Andrew V. Stachulski
- Donnan
and Robert Robinson Laboratories, Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
| | | | - Sophie Pate
- Donnan
and Robert Robinson Laboratories, Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
| | - Joshua Taujanskas
- Donnan
and Robert Robinson Laboratories, Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
| | - Jonathan A. Iggo
- Donnan
and Robert Robinson Laboratories, Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
| | - Rudi Aerts
- Romark
Belgium BVBA, Roosveld
6, 3400 Landen, Belgium
| | | | - Sara Piacentini
- Department
of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Simone La Frazia
- Department
of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - M. Gabriella Santoro
- Department
of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
- Institute
of Translational Pharmacology, CNR, Area della Ricerca di Roma 2, Via Fosso del Cavaliere, 00133 Roma, Italy
| | | | | | - Mark Cooper
- Bio-Techne, Avonmouth, Bristol BS11 9QD, U.K.
| | - Karl Swift
- Bio-Techne, Avonmouth, Bristol BS11 9QD, U.K.
| | - Paul M. O’Neill
- Donnan
and Robert Robinson Laboratories, Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
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Leader P, Curry S, Pate S. Paratracheal abscess after traumatic tracheal intubation. Anaesth Rep 2020; 8:48-51. [PMID: 32537611 DOI: 10.1002/anr3.12045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/03/2020] [Indexed: 11/08/2022] Open
Abstract
Major complications of laryngoscopy and tracheal intubation are rare. However, mucosal trauma during airway management can lead to the introduction of oropharyngeal bacterial flora into the deep neck spaces, with the potential for fatal complications. This report describes the development of a paratracheal abscess in a healthy 62-year-old man following an outpatient herniorrhaphy. The patient was treated with intravenous antibiotics and underwent ultrasound-guided needle aspiration of the abscess. He was later re-admitted to the hospital with re-accumulation of the abscess, which was successfully treated by open surgical drainage. Though deep neck space infection following laryngoscopy is more common in patients with significant comorbidities and when tracheal intubation has been difficult, this case highlights the need for careful airway management in all patients.
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Affiliation(s)
- P Leader
- Department of Surgery University of Kentucky Chandler Medical Center Lexington KY USA
| | - S Curry
- Department of Otolaryngology - Head and Neck Surgery University of Nebraska Medical Center Omaha NE USA
| | - S Pate
- Department of Otolaryngology - Head and Neck Surgery University of Nebraska Medical Center Omaha NE USA
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Collie A, Wehle M, Buskirk S, Young P, Petrou S, Pate S, Broderick G, Parra R, Prussak K, Igel T, Brown N, Earle J. Evaluation of chronic toxicity following radiation therapy for patients with a rising PSA status post prostatectomy. Int J Radiat Oncol Biol Phys 2002. [DOI: 10.1016/s0360-3016(02)03547-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
Optimal delivery of healthcare requires consideration of various costs. A foldable intraocular lens (IOL) is more expensive than an equivalent rigid IOL. However, surgical and post-operative costs may make a foldable IOL economically preferable. We compared the economic costs of cataract surgery plus implantation of a foldable IOL with implantation of a rigid IOL. Prospective audit of the clinical records of 82 pseudophakes; 39 implanted with a rigid IOL and 43 implanted with a foldable IOL by one surgeon. Average follow-up periods were 25 +/- 7 months and 23 +/- 5 months respectively. There was no difference between the two groups for the follow-up period (P = 0.55), number of post-operative complications (P = 0.25) or cost of post-operative visits (P = 0.83). The cost of single-use theatre equipment was greater for the rigid-IOL group (P= 0.0001). The total identified cost per patient was greater for the foldable-IOL group (P = 0.0001). Despite possible technical advantages, implantation of the foldable IOL did not provide an economic benefit, either in the initial cost or in the costs of post-operative care. Over the 2-year period, implanting with the rigid IOL cost, on average, Pound Sterling57 less per patient. Despite this economic difference, a cost-benefit analysis is required, since other factors may be more important.
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Affiliation(s)
- A J Afsar
- Department of Vision Sciences, Glasgow Caledonian University, Scotland, UK
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Abstract
Since human herpesvirus 6 (HHV6) was first linked with exanthem subitum in 1988 there has been increasing evidence that the morbidity associated with acute HHV6 infection may be more significant and variable. However, the clinical appreciation of HHV6 infection has been hampered by the lack of rapid and clinically useful diagnostic methods. In this prospective study of hospitalized febrile children under 3 years of age we compared three rapid viral diagnostic methods, (polymerase chain reaction assay (PCR), IgM serology and direct antigen detection), with conventional serology on paired serum samples. In addition, we documented the range of clinical features associated with acute HHV6 infection. Of 67 children recruited, 11 (16%) had evidence of acute HHV6 infection: six had detectable, specific, IgM; four were PCR positive; and one was PCR positive with IgM. Direct antigen testing on batched frozen samples detected no infections. Apart from high fever (median peak 38.5 degrees C), common features were non-specific. Two children had febrile convulsions and only one child had a non-specific rash. We conclude that rapid microbiological diagnosis at present requires two tests (IgM and PCR). HHV6 is a common cause of febrile illness in hospitalized infants with no rash and should be considered in their diagnosis.
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Affiliation(s)
- R M Bland
- Department of Child Health, University of Glasgow, UK
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Miller M, Lee K, Smith A, Hansen J, Bloch C, Bulten H, DeSchepper D, Ent R, Goodman C, Jacobs W, Jones C, Korsch W, Kramer L, Leuschner M, Lorenzon W, Makins N, Marchlenski D, Meyer H, Milner R, Neal J, Pancella P, Pate S, Pitts W, Rinckel T, Savopulos G, Sowinski J, Sperisen F, Sugarbaker E, Tschalär C, Unal O, Welch T, Zhou ZL. Measurement of Quasielastic 3He(p. Phys Rev Lett 1995; 74:502-505. [PMID: 10058774 DOI: 10.1103/physrevlett.74.502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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