1
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Motawi AT, GamalEl Din SF, Meatmed EM, Fahmy I. Evaluation of efficacy and safety profile of tadalafil 5 mg daily dose in the tablet form versus oral dispersible film in men with mild-to-moderate erectile dysfunction: a comparative placebo-controlled study. Int Urol Nephrol 2024; 56:2531-2537. [PMID: 38433177 PMCID: PMC11266281 DOI: 10.1007/s11255-024-04003-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 02/20/2024] [Indexed: 03/05/2024]
Abstract
PURPOSE We aimed to compare the efficacy, safety, and compliance of tadalafil 5 mg daily dose in the tablet form versus oral dispersible film (ODF) in men with mild-to-moderate erectile dysfunction (ED). METHODS One hundred thirty-five randomized patients were equally divided into three groups according to age where each group included forty-five patients. Within each group, 15 patients received oral tadalafil 5 mg, 15 patients received ODF tadalafil 5 mg and 15 patients received a placebo once daily for 1 month. All participants were assessed by the validated Arabic version of the international index of erectile function (ArIIEF-5) at baseline and after 1 month. Also, the efficacy of different forms of tadalafil 5 mg was assessed by responding affirmatively to a questionnaire. RESULTS Patients aged > 25 to < 40 years and 40-55 years and > 55 years showed a statistically significant improvement of ArIIEF-5 scores after tadalafil 5 mg tablet and ODF tadalafil 5 mg compared to placebo ODF (23 ± 1.4; 22.7 ± 0.9; 20 ± 0.9; 20.4 ± 1.3; 20.2 ± 1.2; 16.6 ± 1.2; 18.5 ± 1.7; 19.6 ± 1.4; 16.3 ± 1.4; p < 0.001, respectively). Three patients (> 25 to < 40 years) who received tadalafil 5 mg tablet showed muscle and back pain. Gastrointestinal (GIT) upset (eight patients) followed by headache (seven patients) were the main side effects reported in patients (40-55 years) who received tadalafil 5 mg tablet. While GIT upset was the main side effect reported in patients (> 55 years) who received tadalafil 5 mg tablet. CONCLUSION ODF tadalafil 5 mg is an effective, tolerable, and safe formulation that can be used in patients with mild-to-moderate ED.
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Affiliation(s)
- Ahmad T Motawi
- Department of Andrology and STDs Kasr Al-Ainy, Sexual Medicine & STIs Department, Faculty of Medicine, Cairo University, Al-Saray Street, El Manial, Cairo, 11956, Egypt
| | - Sameh Fayek GamalEl Din
- Department of Andrology and STDs Kasr Al-Ainy, Sexual Medicine & STIs Department, Faculty of Medicine, Cairo University, Al-Saray Street, El Manial, Cairo, 11956, Egypt.
| | - Eslam M Meatmed
- Department of Andrology and STDs Kasr Al-Ainy, Sexual Medicine & STIs Department, Faculty of Medicine, Cairo University, Al-Saray Street, El Manial, Cairo, 11956, Egypt
| | - Ibrahim Fahmy
- Department of Andrology and STDs Kasr Al-Ainy, Sexual Medicine & STIs Department, Faculty of Medicine, Cairo University, Al-Saray Street, El Manial, Cairo, 11956, Egypt
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2
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Khong QT, Smith EA, Wendt KL, Dalilian M, Goncharova EI, Brownell I, Cichewicz RH, Henrich CJ, Beutler JA, O'Keefe BR, Du L. Chemoreactive 2,5-Diketopiperazines from a Penicillium sp., Structure Revision of Reported Analogues and Proposed Facile Transformation Pathways. JOURNAL OF NATURAL PRODUCTS 2024; 87:1826-1837. [PMID: 38995621 DOI: 10.1021/acs.jnatprod.4c00478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/13/2024]
Abstract
Merkel cell carcinoma (MCC) is a rare and aggressive cutaneous cancer. Two new prenylated indole 2,5-diketopiperazine alkaloids, brevianamides E1 (1) and E2 (2), were isolated from a Penicillium fungus. Both compounds showed moderate cytotoxic activity against select MCC cell lines (i.e., MCC13, MKL-1, UISO, and WaGa) in the low micromolar range. The relative and absolute configurations of 1 and 2 were determined by combined approaches, including NOESY spectroscopy, DFT ECD and DP4 plus calculations, and Marfey's reaction. Literature research and the comparison of NMR and ECD data led to the structure revision of three previously reported natural analogues, notoamides K and P and asperversiamide L. The structurally unstable 1 and 2 underwent steady interconversion under neutral aqueous conditions. Investigation of the degradation of 2 in acidic methanol solutions led to the identification of a new methoxylated derivative (6) and two new ring-opened products (7 and 8) with the rearranged, elongated, 4-methylpent-3-ene side chain. The facile transformation of 2 to 7 and 8 was promoted by the intrinsic impurity (i.e., formaldehyde) of HPLC-grade methanol through the aza-Cope rearrangement.
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Affiliation(s)
- Quan T Khong
- Molecular Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Emily A Smith
- Molecular Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
- Leidos Biomedical Res., Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Karen L Wendt
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Masoumeh Dalilian
- Molecular Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
- Leidos Biomedical Res., Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Ekaterina I Goncharova
- Molecular Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
- Advanced Biomedical Computational Science, Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Isaac Brownell
- Dermatology Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, Maryland 20892, United States
| | - Robert H Cichewicz
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Curtis J Henrich
- Molecular Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
- Leidos Biomedical Res., Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - John A Beutler
- Molecular Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Barry R O'Keefe
- Molecular Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
- Natural Products Branch, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Lin Du
- Molecular Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
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3
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Park SJ, Gil MC, Lee BS, Jung M, Lee BJ. Effects of Postprandial Factors and Second Meal Intake Time on Bioequivalence Investigation of Tadalafil-Loaded Orodispersible Films in Human Volunteers. Pharmaceutics 2024; 16:915. [PMID: 39065611 PMCID: PMC11280306 DOI: 10.3390/pharmaceutics16070915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 06/29/2024] [Accepted: 07/04/2024] [Indexed: 07/28/2024] Open
Abstract
Tadalafil (TD) has poor water solubility but is well absorbed without affecting food intake when administered orally. Owing to patient adherence and therapeutic characteristics, a TD-loaded orodispersible film (TDF) is preferable. However, the mechanistic role of dietary status on the clinical pharmacokinetic analysis of TDF in human volunteers should be investigated because the gastrointestinal environment varies periodically according to meal intervals, although commercial 20 mg TD-loaded tablets (TD-TAB, Cialis® tablet) may be taken with or without food. TDF was prepared by dispersing TD in an aqueous solution and polyethylene glycol 400 to ensure good dispersibility of the TD particles. In the fasting state, each T/R of Cmax and AUC between TD-TAB and TDF showed bioequivalence with 0.936-1.105 and 1.012-1.153, respectively, and dissolution rates in 1000 mL water containing 0.5% SLS were equivalent. In contrast, TDF was not bioequivalent to TD-TAB under the fed conditions by the Cmax T/R of 0.610-0.798. The increased dissolution rate of TDF via the micronization of drug particles and the reduced viscosity of the second meal content did not significantly affect the bioequivalence. Interestingly, an increase in second meal intake time from 4 h to 6 h resulted in the bioequivalence by the Cmax T/R of 0.851-0.998 of TD-TAB and TDF. The predictive diffusion direction model for physical digestion of TD-TAB and TDF in the stomach after the first and second meal intake was successfully simulated using computational fluid dynamics modeling, accounting for the delayed drug diffusion of TDF caused by prolonged digestion of stomach contents under postprandial conditions.
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Affiliation(s)
- Su-Jun Park
- Department of Pharmacy, College of Pharmacy, Ajou University, Suwon-si 16499, Republic of Korea;
- CTCBIO Inc., Hwaseong-si 18576, Republic of Korea
| | - Myung-Chul Gil
- PLUTO Inc., Seongnam-si 13453, Republic of Korea; (M.-C.G.); (B.-S.L.)
| | - Bong-Sang Lee
- PLUTO Inc., Seongnam-si 13453, Republic of Korea; (M.-C.G.); (B.-S.L.)
| | - Minji Jung
- Department of Urology, School of Medicine, Stanford University, Stanford, CA 94305, USA;
| | - Beom-Jin Lee
- Department of Pharmacy, College of Pharmacy, Ajou University, Suwon-si 16499, Republic of Korea;
- Institute of Pharmaceutical Science and Technology, Ajou University, Suwon-si 16499, Republic of Korea
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4
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Andreas MP, Giessen TW. Cyclodipeptide oxidase is an enzyme filament. Nat Commun 2024; 15:3574. [PMID: 38678027 PMCID: PMC11055893 DOI: 10.1038/s41467-024-48030-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 04/17/2024] [Indexed: 04/29/2024] Open
Abstract
Modified cyclic dipeptides represent a widespread class of secondary metabolites with diverse pharmacological activities, including antibacterial, antifungal, and antitumor. Here, we report the structural characterization of the Streptomyces noursei enzyme AlbAB, a cyclodipeptide oxidase (CDO) carrying out α,β-dehydrogenations during the biosynthesis of the antibiotic albonoursin. We show that AlbAB is a megadalton heterooligomeric enzyme filament containing covalently bound flavin mononucleotide cofactors. We highlight that AlbAB filaments consist of alternating dimers of AlbA and AlbB and that enzyme activity is crucially dependent on filament formation. We show that AlbA-AlbB interactions are highly conserved suggesting that other CDO-like enzymes are likely enzyme filaments. As CDOs have been employed in the structural diversification of cyclic dipeptides, our results will be useful for future applications of CDOs in biocatalysis and chemoenzymatic synthesis.
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Affiliation(s)
- Michael P Andreas
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Tobias W Giessen
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI, 48109, USA.
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5
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Abd-AlGhafar WN, Abo Shabana R, El-Shaheny R, Tolba MM. Environmentally benign first derivative synchronous spectrofluorimetry for the analysis of two binary mixtures containing duloxetine with avanafil or tadalafil in spiked plasma samples. LUMINESCENCE 2024; 39:e4696. [PMID: 38494193 DOI: 10.1002/bio.4696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/23/2023] [Accepted: 01/30/2024] [Indexed: 03/19/2024]
Abstract
Antidepressants can cause sexual dysfunction side effects, necessitating the co-administration of phosphodiesterase type 5 inhibitors. The simultaneous determination of these drugs in biological fluids is critical for therapeutic drug monitoring. For the first time, two binary mixtures containing duloxetine with either avanafil or tadalafil were estimated utilizing simple green spectrofluorimetric methods without the need for a previous separation step. The study was based on first derivative synchronous spectrofluorimetry in ethanol using a change in wavelength difference (∆λ) of 20 and 25 nm for the first and second combinations, respectively. Duloxetine and avanafil were estimated at 297.7 and 331 nm in their binary mixture, while duloxetine and tadalafil were determined at 290.3 and 297.7 nm, respectively. The linearity was achieved over the ranges of 0.1-1.5 μg mL-1 for both duloxetine and avanafil and 0.01-0.40 μg mL-1 for tadalafil, with limits of detection of 0.013, 0.022, and 0.004 μg mL-1 for duloxetine, avanafil, and tadalafil, respectively. Successful application of the developed approaches was accomplished for the estimation of the two mixtures in dosage forms as well as human plasma with excellent percentage recoveries (96-103.75% in plasma), which supports their suitability for use in quality control laboratories and pharmacokinetic studies. Moreover, the adopted approaches' greenness was evidenced by applying three tools.
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Affiliation(s)
- Walaa Nabil Abd-AlGhafar
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Rasha Abo Shabana
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Rania El-Shaheny
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Manar M Tolba
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
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6
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Okoli U, Singh H, Jani C, Franco R, Barash M, Alhariri HE. Propofol-Associated Priapism. Am J Ther 2023; 30:e589-e591. [PMID: 36730546 DOI: 10.1097/mjt.0000000000001537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Unoma Okoli
- Department of Medicine, Mount Auburn Hospital, Harvard Medical School, Cambridge, MA
| | - Harpreet Singh
- Department of Medicine, Division of Pulmonary and Critical Care, Medical College of Wisconsin, Milwaukee, WI
| | - Chinmay Jani
- Department of Medicine, Mount Auburn Hospital, Harvard Medical School, Cambridge, MA
| | - Rose Franco
- Department of Medicine, Division of Pulmonary and Critical Care, Medical College of Wisconsin, Milwaukee, WI
| | - Mark Barash
- Department of Medicine, Division of Pulmonary and Critical Care, Medical College of Wisconsin, Milwaukee, WI
| | - Housam E Alhariri
- Department of Medicine, Mount Auburn Hospital, Harvard Medical School, Cambridge, MA
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7
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Villapalos-García G, Zubiaur P, Marián-Revilla C, Soria-Chacartegui P, Navares-Gómez M, Mejía-Abril G, Rodríguez-Lopez A, González-Iglesias E, Martín-Vílchez S, Román M, Ochoa D, Abad-Santos F. Food Administration and Not Genetic Variants Causes Pharmacokinetic Variability of Tadalafil and Finasteride. J Pers Med 2023; 13:1566. [PMID: 38003881 PMCID: PMC10672114 DOI: 10.3390/jpm13111566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/26/2023] [Accepted: 10/27/2023] [Indexed: 11/26/2023] Open
Abstract
Tadalafil and finasteride are used in combination for the management of benign prostatic hyperplasia (BPH). Genetic variations in genes involved in the metabolism and transport of tadalafil or finasteride (i.e., pharmacogenes) could affect their pharmacokinetic processes altering their drug exposure, efficacy, and toxicity. The main objective of this study was to investigate the effects of variants in pharmacogenes on the pharmacokinetics of tadalafil and finasteride. An exploratory candidate gene study involving 120 variants in 33 genes was performed with 66 male healthy volunteers from two bioequivalence clinical trials after administration of tadalafil/finasteride 5 mg/5 mg under fed or fasting conditions. Afterwards, a confirmatory study was conducted with 189 male and female volunteers receiving tadalafil 20 mg formulations in seven additional bioequivalence clinical trials. Regarding tadalafil, fed volunteers showed higher area in the time-concentration curve (AUC∞), maximum plasma concentration (Cmax), and time to reach Cmax (tmax) compared to fasting volunteers; male volunteers also showed higher AUC∞ and Cmax compared to female volunteers. Furthermore, fed volunteers presented higher finasteride AUC∞, Cmax and tmax compared to fasting individuals. Variants in ABCC3, CYP1A2, CES1, NUDT15, SLC22A1/A2 and UGT2B10 were nominally associated with pharmacokinetic variation in tadalafil and/or finasteride but did not remain significant after correction for multiple comparisons. Genetic variation did not demonstrate to clinically impact on the pharmacokinetics of finasteride and tadalafil; however, additional studies with larger sample sizes are needed to assess the effect of rare variants, such as CYP3A4*20 or *22, on tadalafil and finasteride pharmacokinetics.
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Affiliation(s)
- Gonzalo Villapalos-García
- Clinical Pharmacology Department, School of Medicine, Hospital Universitario de La Princesa, Instituto Teófilo Hernando, Instituto de Investigación Sanitaria La Princesa (IP), Universidad Autónoma de Madrid, 28006 Madrid, Spain; (G.V.-G.)
| | - Pablo Zubiaur
- Clinical Pharmacology Department, School of Medicine, Hospital Universitario de La Princesa, Instituto Teófilo Hernando, Instituto de Investigación Sanitaria La Princesa (IP), Universidad Autónoma de Madrid, 28006 Madrid, Spain; (G.V.-G.)
| | - Cristina Marián-Revilla
- Clinical Pharmacology Department, School of Medicine, Hospital Universitario de La Princesa, Instituto Teófilo Hernando, Instituto de Investigación Sanitaria La Princesa (IP), Universidad Autónoma de Madrid, 28006 Madrid, Spain; (G.V.-G.)
| | - Paula Soria-Chacartegui
- Clinical Pharmacology Department, School of Medicine, Hospital Universitario de La Princesa, Instituto Teófilo Hernando, Instituto de Investigación Sanitaria La Princesa (IP), Universidad Autónoma de Madrid, 28006 Madrid, Spain; (G.V.-G.)
| | - Marcos Navares-Gómez
- Clinical Pharmacology Department, School of Medicine, Hospital Universitario de La Princesa, Instituto Teófilo Hernando, Instituto de Investigación Sanitaria La Princesa (IP), Universidad Autónoma de Madrid, 28006 Madrid, Spain; (G.V.-G.)
| | - Gina Mejía-Abril
- Clinical Pharmacology Department, School of Medicine, Hospital Universitario de La Princesa, Instituto Teófilo Hernando, Instituto de Investigación Sanitaria La Princesa (IP), Universidad Autónoma de Madrid, 28006 Madrid, Spain; (G.V.-G.)
| | - Andrea Rodríguez-Lopez
- Clinical Pharmacology Department, School of Medicine, Hospital Universitario de La Princesa, Instituto Teófilo Hernando, Instituto de Investigación Sanitaria La Princesa (IP), Universidad Autónoma de Madrid, 28006 Madrid, Spain; (G.V.-G.)
| | - Eva González-Iglesias
- Clinical Pharmacology Department, School of Medicine, Hospital Universitario de La Princesa, Instituto Teófilo Hernando, Instituto de Investigación Sanitaria La Princesa (IP), Universidad Autónoma de Madrid, 28006 Madrid, Spain; (G.V.-G.)
| | - Samuel Martín-Vílchez
- Clinical Pharmacology Department, School of Medicine, Hospital Universitario de La Princesa, Instituto Teófilo Hernando, Instituto de Investigación Sanitaria La Princesa (IP), Universidad Autónoma de Madrid, 28006 Madrid, Spain; (G.V.-G.)
| | - Manuel Román
- Clinical Pharmacology Department, School of Medicine, Hospital Universitario de La Princesa, Instituto Teófilo Hernando, Instituto de Investigación Sanitaria La Princesa (IP), Universidad Autónoma de Madrid, 28006 Madrid, Spain; (G.V.-G.)
| | - Dolores Ochoa
- Clinical Pharmacology Department, School of Medicine, Hospital Universitario de La Princesa, Instituto Teófilo Hernando, Instituto de Investigación Sanitaria La Princesa (IP), Universidad Autónoma de Madrid, 28006 Madrid, Spain; (G.V.-G.)
| | - Francisco Abad-Santos
- Clinical Pharmacology Department, School of Medicine, Hospital Universitario de La Princesa, Instituto Teófilo Hernando, Instituto de Investigación Sanitaria La Princesa (IP), Universidad Autónoma de Madrid, 28006 Madrid, Spain; (G.V.-G.)
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, 28029 Madrid, Spain
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Andreas MP, Giessen TW. Cyclodipeptide oxidase is an enzyme filament. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.25.559410. [PMID: 37808672 PMCID: PMC10557607 DOI: 10.1101/2023.09.25.559410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Modified cyclic dipeptides represent a widespread class of secondary metabolites with diverse pharmacological activities, including antibacterial, antifungal, and antitumor. Here, we report the structural characterization of the Streptomyces noursei enzyme AlbAB, a cyclodipeptide oxidase (CDO) carrying out α,β-dehydrogenations during the biosynthesis of the antibiotic albonoursin. We show that AlbAB is a megadalton heterooligomeric enzyme filament containing covalently bound flavin mononucleotide cofactors. We highlight that AlbAB filaments consist of alternating dimers of AlbA and AlbB and that enzyme activity is crucially dependent on filament formation. We show that AlbA-AlbB interactions are highly conserved suggesting that all CDO-like enzymes are likely enzyme filaments. Our work represents the first structural characterization of a CDO. As CDOs have been employed in the structural diversification of cyclic dipeptides, our results will be useful for future applications of CDOs in biocatalysis and chemoenzymatic synthesis.
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Affiliation(s)
- Michael P. Andreas
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Tobias W. Giessen
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109, USA
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9
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Stierle SA, Harken L, Li SM. Production of Diketopiperazine Derivatives by Pathway Engineering with Different Cyclodipeptide Synthases from Various Streptomyces Strains. ACS Synth Biol 2023; 12:1804-1812. [PMID: 37183364 DOI: 10.1021/acssynbio.3c00115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Cyclodipeptides from fungi and bacteria are often modified by different tailoring enzymes. They display various biological and pharmacological activities, and some derivatives are used as drugs. In a previous study, we elucidated the function of the silent guatrypmethine gene cluster from Streptomyces cinnamoneus containing a cyclodipeptide synthase (CDPS) core gene gtmA and four genes gtmB-gtmE for tailoring enzymes. The latter are used in this study for the design of modified cyclodipeptides by genetic engineering. Addition of six different cyclodipeptides to the Streptomyces albus transformant harboring gtmB-gtmE led to the detection of different pathway products. Coexpression of five CDPS genes from four Streptomyces strains with gtmB-gtmE resulted in the formation of diketopiperazine derivatives, differing in their modification stages. Our results demonstrate the potential of rational gene combination to increase structural diversity.
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Affiliation(s)
- Sina A Stierle
- Institut für Pharmazeutische Biologie und Biotechnologie, Fachbereich Pharmazie, Philipps-Universität Marburg, 35037 Marburg, Germany
| | - Lauritz Harken
- Institut für Pharmazeutische Biologie und Biotechnologie, Fachbereich Pharmazie, Philipps-Universität Marburg, 35037 Marburg, Germany
| | - Shu-Ming Li
- Institut für Pharmazeutische Biologie und Biotechnologie, Fachbereich Pharmazie, Philipps-Universität Marburg, 35037 Marburg, Germany
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10
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Ribeiro E, Costa B, Vasques-Nóvoa F, Vale N. In Vitro Drug Repurposing: Focus on Vasodilators. Cells 2023; 12:cells12040671. [PMID: 36831338 PMCID: PMC9954697 DOI: 10.3390/cells12040671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 02/10/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023] Open
Abstract
Drug repurposing aims to identify new therapeutic uses for drugs that have already been approved for other conditions. This approach can save time and resources compared to traditional drug development, as the safety and efficacy of the repurposed drug have already been established. In the context of cancer, drug repurposing can lead to the discovery of new treatments that can target specific cancer cell lines and improve patient outcomes. Vasodilators are a class of drugs that have been shown to have the potential to influence various types of cancer. These medications work by relaxing the smooth muscle of blood vessels, increasing blood flow to tumors, and improving the delivery of chemotherapy drugs. Additionally, vasodilators have been found to have antiproliferative and proapoptotic effects on cancer cells, making them a promising target for drug repurposing. Research on vasodilators for cancer treatment has already shown promising results in preclinical and clinical studies. However, additionally research is needed to fully understand the mechanisms of action of vasodilators in cancer and determine the optimal dosing and combination therapy for patients. In this review, we aim to explore the molecular mechanisms of action of vasodilators in cancer cell lines and the current state of research on their repurposing as a treatment option. With the goal of minimizing the effort and resources required for traditional drug development, we hope to shed light on the potential of vasodilators as a viable therapeutic strategy for cancer patients.
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Affiliation(s)
- Eduarda Ribeiro
- OncoPharma Research Group, Center for Health Technology and Services Research (CINTESIS), Rua Doutor Plácido da Costa, 4200-450 Porto, Portugal
- CINTESIS@RISE, Faculty of Medicine, University of Porto, Alameda Professor Hernâni Monteiro, 4200-319 Porto, Portugal
- Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Bárbara Costa
- OncoPharma Research Group, Center for Health Technology and Services Research (CINTESIS), Rua Doutor Plácido da Costa, 4200-450 Porto, Portugal
- CINTESIS@RISE, Faculty of Medicine, University of Porto, Alameda Professor Hernâni Monteiro, 4200-319 Porto, Portugal
| | - Francisco Vasques-Nóvoa
- Cardiovascular R&D Center, Faculty of Medicine, University of Porto, Rua Doutor Plácido da Costa, 4200-450 Porto, Portugal
- Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Rua Doutor Plácido da Costa, 4200-450 Porto, Portugal
| | - Nuno Vale
- OncoPharma Research Group, Center for Health Technology and Services Research (CINTESIS), Rua Doutor Plácido da Costa, 4200-450 Porto, Portugal
- CINTESIS@RISE, Faculty of Medicine, University of Porto, Alameda Professor Hernâni Monteiro, 4200-319 Porto, Portugal
- Department of Community Medicine, Information and Health Decision Sciences (MEDCIDS), Faculty of Medicine, University of Porto, Rua Doutor Plácido da Costa, 4200-450 Porto, Portugal
- Correspondence: ; Tel.: +351-220426537
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11
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Liu J, Li SM. Genomics-Guided Efficient Identification of 2,5-Diketopiperazine Derivatives from Actinobacteria. Chembiochem 2023; 24:e202200502. [PMID: 36098493 PMCID: PMC10092475 DOI: 10.1002/cbic.202200502] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/12/2022] [Indexed: 02/04/2023]
Abstract
Secondary metabolites derived from microorganism constitute an important part of natural products. Mining of the microbial genomes revealed a large number of uncharacterized biosynthetic gene clusters, indicating their greater potential to synthetize specialized or secondary metabolites (SMs) than identified by classic fermentation and isolation approaches. Various bioinformatics tools have been developed to analyze and identify such gene clusters, thus accelerating significantly the mining process. Heterologous expression of an individual biosynthetic gene cluster has been proven as an efficient way to activate the genes and identify the encoded metabolites that cannot be detected under normal laboratory cultivation conditions. Herein, we describe a concept of genomics-guided approach by performing genome mining and heterologous expression to uncover novel CDPS-derived DKPs and functionally characterize novel tailoring enzymes embedded in the biosynthetic pathways. Recent works focused on the identification of the nucleobase-related and dimeric DKPs are also presented.
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Affiliation(s)
- Jing Liu
- Institut für Pharmazeutische Biologie und Biotechnologie, Fachbereich Pharmazie, Philipps-Universität Marburg, Robert-Koch-Straße 4, 35037, Marburg, Germany.,Current address: Department of Natural Products in Organismic Interactions, Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Straße 10, 35043, Marburg, Germany
| | - Shu-Ming Li
- Institut für Pharmazeutische Biologie und Biotechnologie, Fachbereich Pharmazie, Philipps-Universität Marburg, Robert-Koch-Straße 4, 35037, Marburg, Germany
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12
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Hasnani D, Chavda V, Jha S, Gandhi T, Patel A, Raninga H, Chaudhari A. The efficacy of Tadalafil and Tadalafil + Dapoxetine in managing sexual dysfunction in individuals with type-2 diabetes mellitus: A clinical study. JOURNAL OF DIABETOLOGY 2023. [DOI: 10.4103/jod.jod_123_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023] Open
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13
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Rehman ZU, Saini P, Kumar S. Synthesis and Biological Evaluation of Some New Chalcone Derivatives as Anti-inflammatory Agents. Curr Drug Discov Technol 2023; 20:42-66. [PMID: 35702807 DOI: 10.2174/1570163819666220613153225] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/20/2022] [Accepted: 05/07/2022] [Indexed: 11/22/2022]
Abstract
AIM The present research work aims to prepare a series of 1-(4-(2-(1H-indol-1-yl)-2- oxoethoxy)phenyl)-3-phenylprop-2-en-1-one derivatives. METHODS The major compound was achieved by the reaction of indole with chloroacetylchloride in benzene afforded 2-chloro-1-(indoline-1-yl) ethanone which reacts o- hydroxy acetophenone in presence of acetonitrile to form 2-(4-acetylphenoxy)-1-(1H-indol-1-yl)ethan-1-one then goes through aldol condensation to give various final derivatives. RESULTS AND CONCLUSION After the synthesis of compounds, the synthesized compounds were characterized by checking their solubility, melting point, thin layer chromatography, IR, 1HNMR spectral data and elemental analysis. All of the prepared derivatives were evaluated for their anti-inflammatory activity on wistar albino rats by following the carrageenan-induced Rat Hind Paw Edema model.
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Affiliation(s)
- Zia Ur Rehman
- School of Pharmaceutical Sciences, IFTM University Moradabad (244001), U.P, India
| | - Pooja Saini
- School of Pharmaceutical Sciences, IFTM University Moradabad (244001), U.P, India
| | - Sushil Kumar
- School of Pharmaceutical Sciences, IFTM University Moradabad (244001), U.P, India
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14
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Ali EA, Sardar S, Yassin MA. Priapism in Lymphoproliferative Disorders: A Systematic Review. Hematol Oncol Stem Cell Ther 2022; 15:176-182. [PMID: 34157311 DOI: 10.1016/j.hemonc.2021.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 05/20/2021] [Accepted: 05/23/2021] [Indexed: 01/14/2023] Open
Abstract
Priapism is defined as a persistent penile erection lasting more than 4 h. We searched the literature for reviews, case reports, and series for patients with lymphoproliferative disorders who developed priapism. The search involved all the lymphoproliferative disorders included in the revised 2016 World Health Organization classification of lymphoid neoplasms including chronic lymphocytic leukemia, multiple myeloma, Waldenström macroglobulinemia, and lymphomas. A total of 16 articles were found. The search included cases up to 4th January 2021. Priapism was seen most commonly as the first manifestation of lymphoproliferative disorders, rarely seen after treatment or after diagnosis.
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Affiliation(s)
- Elrazi A Ali
- Internal Medicine Department, Hamad Medical Corporation, Doha, Qatar
| | - Sundus Sardar
- Internal Medicine Department, Hamad Medical Corporation, Doha, Qatar
| | - Mohamed A Yassin
- Department of Hematology and Oncology, Hamad Medical Corporation, Doha, Qatar
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15
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Ali HSM, Ahmed SA, Alqurshi AA, Alalawi AM, Shehata AM, Alahmadi YM. Boosting Tadalafil Bioavailability via Sono-Assisted Nano-Emulsion-Based Oral Jellies: Box-Behnken Optimization and Assessment. Pharmaceutics 2022; 14:pharmaceutics14122592. [PMID: 36559086 PMCID: PMC9781150 DOI: 10.3390/pharmaceutics14122592] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/19/2022] [Accepted: 11/21/2022] [Indexed: 11/26/2022] Open
Abstract
Tadalafil (TAD) is a poorly soluble, phosphodiesterase inhibitor used to treat erectile dysfunction. The primary goal of this project was to prepare nano-emulsions using ultrasonic technology to address TAD bioavailability concerns. The Box−Behnken design was employed to find prominent correlations between factors impacting the sono-emulsification process. The emulsifier concentration, amplitude level, and ultrasonication time were the independent factors, whereas the average droplet size (ADS) and polydispersity index (PDI) were designated as the response variables. TAD-loaded nano-emulsions (93−289 nm) were generated and the emulsifier concentration showed a crucial role in directing emulsion droplet size. The model desirability function was utilized to optimize a nano-emulsion with a small ADS (99.67 ± 7.55 nm) and PDI (0.45 ± 0.04) by adjusting the emulsifiers concentration, amplitude level, and ultrasonication time at 9.85%, 33%, 49 s, respectively. The optimized nano-emulsions did not demonstrate any precipitation or phase separation after stability stress tests. TAD jellies were formulated based on the optimized nano-emulsion and subjected to in vitro evaluation for physical characteristics; TAD content, pH, spreadability, viscosity, syneresis, and taste-masking ability. An optimized nano-emulsion-based jelly (NEJ) formulation showed more than 96% drug dissolution in 30 min relative to 14% for the unprocessed TAD. In vivo assessment of NEJ in experimental rats demonstrated a significant enhancement (p < 0.05) of TAD bioavailability with an AUC0−24h of 2045 ± 70.2 vs. 259.9 ± 17.7 ng·h·mL−1 for the unprocessed TAD. Storage stability results revealed that NEJ remained stable with unremarkable changes in properties for 3 months. Overall, NEJ can be regarded as a successful therapeutic option for TAD administration with immediate-release properties and improved bioavailability.
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Affiliation(s)
- Hany S. M. Ali
- Department of Pharmaceutics and Pharmaceutical Technology, College of Pharmacy, Taibah University, Al-Madinah Al-Munawarah P.O. Box 344, Saudi Arabia
- Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
- Correspondence: ; Tel.: +966-50-286-4018; Fax: +966-4-847-5027
| | - Sameh A. Ahmed
- Department of Pharmacognosy and Pharmaceutical Chemistry, College of Pharmacy, Taibah University, Al-Madinah Al-Munawarah P.O. Box 344, Saudi Arabia
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | - Abdulmalik A. Alqurshi
- Department of Pharmaceutics and Pharmaceutical Technology, College of Pharmacy, Taibah University, Al-Madinah Al-Munawarah P.O. Box 344, Saudi Arabia
| | - Ali M. Alalawi
- Department of Pharmacology and Toxicology, College of Pharmacy, Taibah University, Al-Madinah Al-Munawarah P.O. Box 344, Saudi Arabia
| | - Ahmed M. Shehata
- Department of Pharmacology and Toxicology, College of Pharmacy, Taibah University, Al-Madinah Al-Munawarah P.O. Box 344, Saudi Arabia
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62521, Egypt
| | - Yaser M. Alahmadi
- Department of Clinical and Hospital Pharmacy, College of Pharmacy, Taibah University, Al-Madinah Al-Munawarah P.O. Box 344, Saudi Arabia
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Desai RJ, Mahesri M, Lee SB, Varma VR, Loeffler T, Schilcher I, Gerhard T, Segal JB, Ritchey ME, Horton DB, Kim SC, Schneeweiss S, Thambisetty M. No association between initiation of phosphodiesterase-5 inhibitors and risk of incident Alzheimer's disease and related dementia: results from the Drug Repurposing for Effective Alzheimer's Medicines study. Brain Commun 2022; 4:fcac247. [PMID: 36330433 PMCID: PMC9598543 DOI: 10.1093/braincomms/fcac247] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 07/11/2022] [Accepted: 09/27/2022] [Indexed: 11/06/2022] Open
Abstract
We evaluated the hypothesis that phosphodiesterase-5 inhibitors, including sildenafil and tadalafil, may be associated with reduced incidence of Alzheimer's disease and related dementia using a patient-level cohort study of Medicare claims and cell culture-based phenotypic assays. We compared incidence of Alzheimer's disease and related dementia after phosphodiesterase-5 inhibitor initiation versus endothelin receptor antagonist initiation among patients with pulmonary hypertension after controlling for 76 confounding variables through propensity score matching. Across four separate analytic approaches designed to address specific types of biases including informative censoring, reverse causality, and outcome misclassification, we observed no evidence for a reduced risk of Alzheimer's disease and related dementia with phosphodiesterase-5 inhibitors;hazard ratio (95% confidence interval): 0.99 (0.69-1.43), 1.00 (0.71-1.42), 0.67 (0.43-1.06), and 1.15 (0.57-2.34). We also did not observe evidence that sildenafil ameliorated molecular abnormalities relevant to Alzheimer's disease in most cell culture-based phenotypic assays. These results do not provide support to the hypothesis that phosphodiesterase-5 inhibitors are promising repurposing candidates for Alzheimer's disease and related dementia.
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Affiliation(s)
- Rishi J Desai
- Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital & Harvard Medical School, Boston, MA 02115, USA
| | - Mufaddal Mahesri
- Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital & Harvard Medical School, Boston, MA 02115, USA
| | - Su Been Lee
- Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital & Harvard Medical School, Boston, MA 02115, USA
| | - Vijay R Varma
- Clinical & Translational Neuroscience Section, Laboratory of Behavioral Neuroscience, National Institute on Aging, Baltimore, MD 21224, USA
| | - Tina Loeffler
- QPS Austria GmbH, Parkring 12, 8074 Grambach, Austria
| | | | - Tobias Gerhard
- Rutgers Center for Pharmacoepidemiology and Treatment Science, New Brunswick, NJ 08901, USA
- Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ 08854, USA
| | - Jodi B Segal
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Mary E Ritchey
- Rutgers Center for Pharmacoepidemiology and Treatment Science, New Brunswick, NJ 08901, USA
| | - Daniel B Horton
- Rutgers Center for Pharmacoepidemiology and Treatment Science, New Brunswick, NJ 08901, USA
- Rutgers Robert Wood Johnson Medical School, Rutgers University, Piscataway, NJ 08901, USA
| | - Seoyoung C Kim
- Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital & Harvard Medical School, Boston, MA 02115, USA
- Division of Rheumatology, Inflammation, and Immunity, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Sebastian Schneeweiss
- Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital & Harvard Medical School, Boston, MA 02115, USA
| | - Madhav Thambisetty
- Clinical & Translational Neuroscience Section, Laboratory of Behavioral Neuroscience, National Institute on Aging, Baltimore, MD 21224, USA
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Tadalafil-Loaded Self-Nanoemulsifying Chewable Tablets for Improved Bioavailability: Design, In Vitro, and In Vivo Testing. Pharmaceutics 2022; 14:pharmaceutics14091927. [PMID: 36145675 PMCID: PMC9504296 DOI: 10.3390/pharmaceutics14091927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/08/2022] [Accepted: 09/08/2022] [Indexed: 11/17/2022] Open
Abstract
This research aimed to develop innovative self-nanoemulsifying chewable tablets (SNECT) to increase oral bioavailability of tadalafil (TDL), a nearly insoluble phosphodiesterase-5 inhibitor. Cinnamon essential oil, PEG 40 hydrogenated castor oil (Cremophor® RH 40), and polyethylene glycol 400 served as the oil, surfactant, and cosurfactant in the nanoemulsifying system, respectively. Primary liquid self-nanoemulsifying delivery systems (L-SNEDDS) were designed using phase diagrams and tested for dispersibility, droplet size, self-emulsifying capability, and thermodynamic stability. Adsorption on a carrier mix of silicon dioxide and microcrystalline cellulose was exploited to solidify the optimum L-SNEDDS formulation as self-nanoemulsifying granules (SNEG). Lack of crystalline TDL within the granules was verified by DSC and XRPD. SNEG were able to create a nanoemulsion instantaneously (165 nm), a little larger than the original nanoemulsion (159 nm). SNECT were fabricated by compressing SNEG with appropriate excipients. The obtained SNECT retained their quick dispersibility dissolving 84% of TDL within 30 min compared to only 18% dissolution from tablets of unprocessed TDL. A pharmacokinetic study in Sprague−Dawley rats showed a significant increase in Cmax (2.3-fold) and AUC0−24 h (5.33-fold) of SNECT relative to the unprocessed TDL-tablet (p < 0.05). The stability of TDL-SNECT was checked against dilutions with simulated GI fluids. In addition, accelerated stability tests were performed for three months at 40 ± 2 °C and 75% relative humidity. Results revealed the absence of obvious changes in size, PDI, or other tablet parameters before and after testing. In conclusion, current findings illustrated effectiveness of SNECT to enhance TDL dissolution and bioavailability in addition to facilitating dose administration.
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Corti V, Thøgersen MK, Enemærke VJ, Rezayee NM, Barløse CL, Anker Jørgensen K. Construction of C‐N Atropisomers by Aminocatalytic Enantioselective Addition of Indole‐2‐carboxaldehydes to
o
‐Quinone Derivatives. Chemistry 2022; 28:e202202395. [DOI: 10.1002/chem.202202395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Vasco Corti
- Department of Chemistry Aarhus University Aarhus 8000 Aarhus C Denmark
| | | | | | - Nomaan M. Rezayee
- Department of Chemistry Aarhus University Aarhus 8000 Aarhus C Denmark
| | - Casper L. Barløse
- Department of Chemistry Aarhus University Aarhus 8000 Aarhus C Denmark
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Abstract
Discovering novel synthetic routes for rigid nitrogen-containing polyheterocycles using sustainable, atom-economical, and efficient (= short) synthetic pathways is of high interest in organic chemistry. Here, we describe an operationally simple and short synthesis of the privileged scaffold dihydropyrrolo[1,2-a]pyrazine-dione from readily accessible starting materials. The alkaloid-type polycyclic scaffold with potential bioactivity was achieved by a multicomponent reaction (MCR)-based protocol via a Ugi four-component reaction and Pictet-Spengler sequence under different conditions, yielding a diverse library of products.
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Affiliation(s)
- Bidong Zhang
- Department of Drug Design, University of Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Katarzyna Kurpiewska
- Department of Crystal Chemistry and Crystal Physics Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Alexander Dömling
- Department of Drug Design, University of Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
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20
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Soni JP, Sathish M, Nachtigall FM, Santos LS, Shankaraiah N. Brown seaweed‐derived alginic acid: An efficient and reusable catalyst for Pictet‐Spengler reaction to access tetrahydro‐β‐carboline and tetrahydroisoquinoline frameworks. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jay Prakash Soni
- National Institute of Pharmaceutical Education and Research Hyderabad Department of Medicinal Chemistry 500037 Hyderabad INDIA
| | - Manda Sathish
- Catholic University of the Maule: Universidad Catolica del Maule Research center for Advance Studies of Maule, 3460000 Talca CHILE
| | - Fabiane M. Nachtigall
- Universidad Autonoma de Chile Instituto de Ciencias Quimicas Aplicadas 3467987 Talca CHILE
| | - Leonardo S. Santos
- Talca University: Universidad de Talca Chemistry Institute of Natural Resources 3460000 Talca CHILE
| | - Nagula Shankaraiah
- National Institute of Pharmaceutical Education and Research NIPER Department of Medicinal Chemistry Balanagar 500037 Hyderabad INDIA
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21
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Pham T, Butler A, Weideman RA, Annaswamy TM. Phosphodiesterase 5 Inhibitor Use in Patients Undergoing Decompression Surgery for Lumbar Spinal Stenosis. Am J Phys Med Rehabil 2022; 101:341-347. [PMID: 34121069 DOI: 10.1097/phm.0000000000001821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Our objectives were to explore the association between phosphodiesterase 5 inhibitor use and lumbar decompression surgery by evaluating the prevalence of lumbar decompression surgery in a treatment group of patients with lumbar spinal stenosis compared with a control group. DESIGN We performed database review and extracted data including lumbar decompression surgery prevalence, phosphodiesterase 5 inhibitor dosage, and fill dates. Treatment group was defined as those with phosphodiesterase 5 inhibitor fill dates of less than 30 days before surgery, and control group was defined as those with phosphodiesterase 5 inhibitor fill dates at any other time. Lumbar decompression surgery prevalence rates for both groups were calculated. RESULTS Our study found 599 lumbar spinal stenosis patients who were prescribed phosphodiesterase 5 inhibitor. Three hundred thirty-eight underwent lumbar decompression surgery. Of these, 71 (21%) filled their prescription of less than 30 days before surgery, whereas 267 (79%) filled their prescription during a different period. The majority (94.6%) of surgical patients received decompression at two or more spinal levels. CONCLUSIONS Prevalence of lumbar decompression surgery for lumbar spinal stenosis was significantly lower in patients in the treatment group on phosphodiesterase 5 inhibitor therapy compared with the control group. Among many potential explanations, the vasodilatory effect of phosphodiesterase 5 inhibitor may have contributed to a lower surgical rate. This is the first study to explore this novel association. Future prospective studies are necessary to better define the utility of phosphodiesterase 5 inhibitor in lumbar spinal stenosis.
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Affiliation(s)
- Tri Pham
- From the University of Texas Southwestern Medical Center, Dallas, Texas (TP); University of Cincinnati College of Medicine, Cincinnati, Ohio (AB); Pharmacy Service, VA North Texas Health Care System, Dallas, Texas (RAW); Physical Medicine and Rehabilitation Service, VA North Texas Health Care System, Dallas, Texas (TMA); and Department of Physical Medicine and Rehabilitation, University of Texas Southwestern Medical Center, Dallas, Texas (TMA)
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22
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A Review on Phosphodiesterase-5 Inhibitors as a Topical Therapy for Erectile Dysfunction. Sex Med Rev 2022; 10:376-391. [DOI: 10.1016/j.sxmr.2022.02.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 02/12/2022] [Accepted: 02/15/2022] [Indexed: 11/18/2022]
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From a Symptom-Based to a Mechanism-Based Pharmacotherapeutic Treatment in Complex Regional Pain Syndrome. Drugs 2022; 82:511-531. [PMID: 35247200 PMCID: PMC9016036 DOI: 10.1007/s40265-022-01685-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/07/2022] [Indexed: 02/06/2023]
Abstract
Complex regional pain syndrome (CRPS) is a debilitating painful condition of a distal extremity that can develop after tissue damage. CRPS is thought to be a multimechanism syndrome and ideally the most prominent mechanism(s) should be targeted by drugs in an individually tailored manner. This review gives an overview of the action and evidence of current and future pharmacotherapeutic options for CRPS. The available options are grouped in four categories by their therapeutic actions on the CRPS mechanisms, i.e. inflammation, central sensitisation, vasomotor disturbances and motor disturbances. More knowledge about the underlying mechanisms of CRPS helps to specifically target important CRPS mechanisms. In the future, objective biomarkers could potentially aid in selecting appropriate mechanism-based drugs in order to increase the effectiveness of CRPS treatment. Using this approach, current and future pharmacotherapeutic options for CRPS should be studied in multicentre trials to prove their efficacy. The ultimate goal is to shift the symptom-based selection of therapy into a mechanism-based selection of therapy in CRPS.
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Chan YC, Sak MH, Frank SA, Miller SJ. Tunable and Cooperative Catalysis for Enantioselective Pictet-Spengler Reaction with Varied Nitrogen-Containing Heterocyclic Carboxaldehydes. Angew Chem Int Ed Engl 2021; 60:24573-24581. [PMID: 34487418 PMCID: PMC8556314 DOI: 10.1002/anie.202109694] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/24/2021] [Indexed: 01/16/2023]
Abstract
Herein we report an organocatalytic enantioselective functionalization of heterocyclic carboxaldehydes via the Pictet-Spengler reaction. Through careful pairing of novel squaramide and Brønsted acid catalysts, our method tolerates a breadth of heterocycles, enabling preparation of a series of heterocycle conjugated β-(tetrahydro)carbolines in good yield and enantioselectivity. Careful selection of carboxylic acid co-catalyst is essential for toleration of a variety of regioisomeric heterocycles. Utility is demonstrated via the three-step stereoselective preparation of pyridine-containing analogues of potent selective estrogen receptor downregulator and U.S. FDA approved drug Tadalafil.
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Affiliation(s)
- Yuk-Cheung Chan
- Department of Chemistry, Yale University, New Haven, CT, 06520, USA
| | - Marcus H Sak
- Department of Chemistry, Yale University, New Haven, CT, 06520, USA
| | - Scott A Frank
- Synthetic Molecule Design and Development, Eli Lilly and Company, Indianapolis, IN, 46285, USA
| | - Scott J Miller
- Department of Chemistry, Yale University, New Haven, CT, 06520, USA
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Chan Y, Sak MH, Frank SA, Miller SJ. Tunable and Cooperative Catalysis for Enantioselective Pictet‐Spengler Reaction with Varied Nitrogen‐Containing Heterocyclic Carboxaldehydes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109694] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Yuk‐Cheung Chan
- Department of Chemistry Yale University New Haven CT 06520 USA
| | - Marcus H. Sak
- Department of Chemistry Yale University New Haven CT 06520 USA
| | - Scott A. Frank
- Synthetic Molecule Design and Development Eli Lilly and Company Indianapolis IN 46285 USA
| | - Scott J. Miller
- Department of Chemistry Yale University New Haven CT 06520 USA
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26
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Sangster JJ, Marshall JR, Turner NJ, Mangas-Sanchez J. New Trends and Future Opportunities in the Enzymatic Formation of C-C, C-N, and C-O bonds. Chembiochem 2021; 23:e202100464. [PMID: 34726813 PMCID: PMC9401909 DOI: 10.1002/cbic.202100464] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/29/2021] [Indexed: 01/04/2023]
Abstract
Organic chemistry provides society with fundamental products we use daily. Concerns about the impact that the chemical industry has over the environment is propelling major changes in the way we manufacture chemicals. Biocatalysis offers an alternative to other synthetic approaches as it employs enzymes, Nature's catalysts, to carry out chemical transformations. Enzymes are biodegradable, come from renewable sources, operate under mild reaction conditions, and display high selectivities in the processes they catalyse. As a highly multidisciplinary field, biocatalysis benefits from advances in different areas, and developments in the fields of molecular biology, bioinformatics, and chemical engineering have accelerated the extension of the range of available transformations (E. L. Bell et al., Nat. Rev. Meth. Prim. 2021, 1, 1-21). Recently, we surveyed advances in the expansion of the scope of biocatalysis via enzyme discovery and protein engineering (J. R. Marshall et al., Tetrahedron 2021, 82, 131926). Herein, we focus on novel enzymes currently available to the broad synthetic community for the construction of new C-C, C-N and C-O bonds, with the purpose of providing the non-specialist with new and alternative tools for chiral and sustainable chemical synthesis.
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Affiliation(s)
- Jack J Sangster
- Department of Chemistry, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - James R Marshall
- Department of Chemistry, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Nicholas J Turner
- Department of Chemistry, Manchester Institute of Biotechnology, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Juan Mangas-Sanchez
- Institute of Chemical Synthesis and Homogeneous Catalysis, Spanish National Research Council (CSIC), Pedro Cerbuna 12, 50009, Zaragoza, Spain.,ARAID Foundation, Zaragoza, Spain
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Bojarska J, Mieczkowski A, Ziora ZM, Skwarczynski M, Toth I, Shalash AO, Parang K, El-Mowafi SA, Mohammed EHM, Elnagdy S, AlKhazindar M, Wolf WM. Cyclic Dipeptides: The Biological and Structural Landscape with Special Focus on the Anti-Cancer Proline-Based Scaffold. Biomolecules 2021; 11:1515. [PMID: 34680148 PMCID: PMC8533947 DOI: 10.3390/biom11101515] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 12/12/2022] Open
Abstract
Cyclic dipeptides, also know as diketopiperazines (DKP), the simplest cyclic forms of peptides widespread in nature, are unsurpassed in their structural and bio-functional diversity. DKPs, especially those containing proline, due to their unique features such as, inter alia, extra-rigid conformation, high resistance to enzyme degradation, increased cell permeability, and expandable ability to bind a diverse of targets with better affinity, have emerged in the last years as biologically pre-validated platforms for the drug discovery. Recent advances have revealed their enormous potential in the development of next-generation theranostics, smart delivery systems, and biomaterials. Here, we present an updated review on the biological and structural profile of these appealing biomolecules, with a particular emphasis on those with anticancer properties, since cancers are the main cause of death all over the world. Additionally, we provide a consideration on supramolecular structuring and synthons, based on the proline-based DKP privileged scaffold, for inspiration in the design of compound libraries in search of ideal ligands, innovative self-assembled nanomaterials, and bio-functional architectures.
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Affiliation(s)
- Joanna Bojarska
- Faculty of Chemistry, Institute of General & Inorganic Chemistry, Technical University of Lodz, 90-924 Lodz, Poland;
| | - Adam Mieczkowski
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawinskiego 5a, 02-106 Warsaw, Poland;
| | - Zyta M. Ziora
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia; (Z.M.Z.); (I.T.)
| | - Mariusz Skwarczynski
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia; (M.S.); (A.O.S.)
| | - Istvan Toth
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia; (Z.M.Z.); (I.T.)
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia; (M.S.); (A.O.S.)
- School of Pharmacy, The University of Queensland, Woolloongabba, QLD 4102, Australia
| | - Ahmed O. Shalash
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia; (M.S.); (A.O.S.)
| | - Keykavous Parang
- Center for Targeted Drug Delivery, Department of Biomedical and Pharmaceutical Sciences, Harry and Diane Rinker Health Science Campus, School of Pharmacy, Chapman University, Irvine, CA 92618, USA; (K.P.); (S.A.E.-M.); (E.H.M.M.)
| | - Shaima A. El-Mowafi
- Center for Targeted Drug Delivery, Department of Biomedical and Pharmaceutical Sciences, Harry and Diane Rinker Health Science Campus, School of Pharmacy, Chapman University, Irvine, CA 92618, USA; (K.P.); (S.A.E.-M.); (E.H.M.M.)
| | - Eman H. M. Mohammed
- Center for Targeted Drug Delivery, Department of Biomedical and Pharmaceutical Sciences, Harry and Diane Rinker Health Science Campus, School of Pharmacy, Chapman University, Irvine, CA 92618, USA; (K.P.); (S.A.E.-M.); (E.H.M.M.)
| | - Sherif Elnagdy
- Botany Department, Faculty of Science, Cairo University, Giza 12613, Egypt; (S.E.); (M.A.)
| | - Maha AlKhazindar
- Botany Department, Faculty of Science, Cairo University, Giza 12613, Egypt; (S.E.); (M.A.)
| | - Wojciech M. Wolf
- Faculty of Chemistry, Institute of General & Inorganic Chemistry, Technical University of Lodz, 90-924 Lodz, Poland;
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Kumar S, Malakar CC, Singh V. Cu(II)‐Catalysed Azide‐Alkyne Cycloaddition Reaction towards Synthesis of β‐Carboline C1‐Tethered 1,2,3‐Triazole Derivatives. ChemistrySelect 2021. [DOI: 10.1002/slct.202100002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sunit Kumar
- Department of Chemistry Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar 144011 Punjab India
| | - Chandi C. Malakar
- Department of Chemistry National Institute of Technology (NIT) Manipur Imphal 795004 India
| | - Virender Singh
- Department of Chemistry Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar 144011 Punjab India
- Department of Chemistry Central University of Punjab, Bathinda 151401 Punjab India
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Janabi AHD. Molecular Docking Analysis of Anti-Severe Acute Respiratory Syndrome-Coronavirus 2 Ligands against Spike Glycoprotein and the 3-Chymotrypsin-Like Protease. JOURNAL OF MEDICAL SIGNALS & SENSORS 2021; 11:31-36. [PMID: 34026588 PMCID: PMC8043116 DOI: 10.4103/jmss.jmss_25_20] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 07/26/2020] [Accepted: 09/08/2020] [Indexed: 12/21/2022]
Abstract
Background: The severe acute respiratory syndrome-like disease coronavirus disease 2019 (COVID-19) is a disastrous global pandemic with 16,288,490 infected cases and 649,884 deaths. Until now, no effective treatments are found. Methods: The virus uses the 3-chymotrypsin-like protease for inducing the activity of the viral polyproteins and the spike (S) glycoprotein for human cell entry through the human angiotensin-converting enzyme 2 receptor. Blocking the active binding sites of these molecules might be beneficial for decreasing the activity of the virus and suppressing the viral entry to the human cells. Here, docking methods were used to identify a group of ligands may perform the blocking operations. Results: The results revealed the strongest binding affinities, sorted high to low, for tadalafil (Cialis) (phosphodiesterase type 5 inhibitor, tirofiban (antiplatelet), paraxanthine (central nervous system stimulant), dexamethasone, gentian violet cation (triphenylmethane), salbutamol, and amlodipine (calcium channel blocker). Conclusion: These substances may provide vital help for further clinical investigation in fighting against the current global pandemic of the COVID-19.
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Affiliation(s)
- Ali Hassan Daghir Janabi
- Department of Veterinary Microbiology, College of Veterinary Medicine, University of Al-Qadisiyah, Diwaniyah City, Iraq
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Ma J, Liu Z, Wu J, Zhou Z, Zhang X, Cui Y, Lin C. Role of application of tadalafil 5 mg once-daily (≥6 months) in men with erectile dysfunction from six randomized controlled trials. Transl Androl Urol 2020; 9:1405-1414. [PMID: 32676425 PMCID: PMC7354289 DOI: 10.21037/tau-19-809] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
This meta-analysis was performed to assess the efficacy and safety of taking tadalafil 5 mg once-daily for at least 6 months in the treatment of erectile dysfunction (ED). Based on databases: MEDLINE, EMBASE and Cochrane Controlled Trials Register, this analysis was performed to collect randomized controlled trials (RCTs) of tadalafil 5mg once-daily in treating ED over 6 months. Reviewers also investigated the references of each literature. The meta-analysis covered a total of 1,596 patients in six RCTs. The tadalafil group performed a better effect in terms of the international index of erectile function-erectile function (IIEF) domain (P=0.005) for the treatment of ED compared with the placebo group. Safety assessments including discontinuations due to adverse events (AEs) (P=0.31) and treatment-emergent AEs (P=0.06) indicated that the tadalafil group had a better tolerate. The analysis elucidates that the dose of 5 mg per day of tadalafil showed a good effect after the treatment of at least 6 months relative to the control group with fewer side effects.
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Affiliation(s)
- Jiajia Ma
- Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China
| | - Zi Liu
- Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China.,Binzhou Medical University, Yantai, China
| | - Jitao Wu
- Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China
| | - Zhongbao Zhou
- Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China.,Binzhou Medical University, Yantai, China
| | - Xuebao Zhang
- Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China
| | - Yuanshan Cui
- Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China
| | - Chunhua Lin
- Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China
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Mehanna M, Domiati S, Nakkash Chmaisse H, El Mallah A. Analgesia additive interaction between tadalafil and morphine in an experimental animal model. Can J Physiol Pharmacol 2020; 98:771-776. [PMID: 32516551 DOI: 10.1139/cjpp-2019-0674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Since both morphine and tadalafil have been proven to exert some of their analgesic activity through modulation of the NO-cGMP pathway, the aim of the current study is to evaluate the pharmacologic interaction between tadalafil and morphine to decrease the dose of morphine and subsequently its side effects. The assessment was carried out through isobolographic analysis relative to ED50s of both morphine and tadalafil obtained by tail-flick test on BALB/c mice. Morphine and tadalafil ED50s calculated from the dose-response curves were 8303 and 2080 μg/kg, respectively. The experimental ED50 values of morphine and tadalafil in their mixture were 4800 and 1210 μg/kg, respectively. Those results showed an additive interaction between morphine and tadalafil presented by a total fraction value for the mixture of 1160 μg/kg. This outcome can be interpreted by the fact that both drugs share common pathways, namely, NO-cGMP and opioid receptors. As a conclusion, the morphine and tadalafil combination showed an additive effect against acute pain, which is mediated through the central nervous system, thus providing a rationale for combining them to decrease morphine dose and thus minimizing its side effects.
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Affiliation(s)
- Mohammed Mehanna
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Beirut Arab University, Beirut, Lebanon
| | - Souraya Domiati
- Department of Pharmacology and Therapeutics, Faculty of Pharmacy, Beirut Arab University, Beirut, Lebanon
| | - Hania Nakkash Chmaisse
- Department of Pharmacology and Therapeutics, Faculty of Pharmacy, Beirut Arab University, Beirut, Lebanon
| | - Ahmed El Mallah
- Department of Pharmacology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
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Eurtivong C, Pilkington LI, van Rensburg M, White RM, Brar HK, Rees S, Paulin EK, Xu CS, Sharma N, Leung IK, Leung E, Barker D, Reynisson J. Discovery of novel phosphatidylcholine-specific phospholipase C drug-like inhibitors as potential anticancer agents. Eur J Med Chem 2020; 187:111919. [DOI: 10.1016/j.ejmech.2019.111919] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 11/11/2019] [Accepted: 11/26/2019] [Indexed: 01/09/2023]
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Daghir Janabi AH. Effective Anti-SARS-CoV-2 RNA Dependent RNA Polymerase Drugs Based on Docking Methods: The Case of Milbemycin, Ivermectin, and Baloxavir Marboxil. Avicenna J Med Biotechnol 2020; 12:246-250. [PMID: 33014317 PMCID: PMC7502160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Severe Acute Respiratory Syndrome-coronavirus 2 (SARS-CoV-2) is a new virus with a global pandemic. Yet, no vaccine or efficient treatments are found against the disease. The viral RNA dependent RNA Polymerase (RdRP) is a suitable target for developing antiviral agents. SARS-CoV-2 RdRP was employed to test its binding activity with some drugs. METHODS Using some docking methods, RdRP was targeted by Milbemycins (MMs), Ivermectin (IMT), Baloxavir Marboxil (BM), and Tadalafil (TF), a phosphodiesterase type 5 inhibitor. RESULTS MM-A3 5-oxime (MMA35O), MM-A3 (MMA3), MM-A4 5-oxime (MMA45O), IMT, BM, and TF showed the highest binding affinity to RdRp. CONCLUSION The drugs used in the present computational investigation are effective against the SARS-CoV-2 RdRP with high affinity values especially, milbemycins, ivermectin, and Baloxavir marboxil, which could further be studied in laboratory and clinical trials for saving millions of lives around the world.
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Affiliation(s)
- Ali Hassan Daghir Janabi
- Corresponding author: Ali Hassan Daghir Janabi, Ph.D., Department of Veterinary Microbiology, College of Veterinary Medicine, University of Al-Qadisiyah, Diwaniyah City, Iraq, Tel: +96 47810069889, E-mail:
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34
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Singh M, Paul AK, Singh V. A transition metal-free approach towards the regioselective synthesis of β-carboline tethered pyrroles and 2,3-dihydro-1 H-pyrroles. NEW J CHEM 2020. [DOI: 10.1039/d0nj02315a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A transition metal-free one-pot sequential approach has been unfolded for the synthesis of β-carboline tethered pyrroles and 2,3-dihydro-1H-pyrroles by using highly diverse 1-formyl-9H-β-carbolines as a template.
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Affiliation(s)
- Manpreet Singh
- Department of Chemistry
- Dr B R Ambedkar National Institute of Technology (NIT)
- Jalandhar
- India
| | - Avijit Kumar Paul
- Department of Chemistry
- National Institute of Technology Kurukshetra
- India
| | - Virender Singh
- Department of Chemistry
- Dr B R Ambedkar National Institute of Technology (NIT)
- Jalandhar
- India
- Department of Chemistry
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Choi JB, Cho KJ, Kim JC, Pae CU, Koh JS. An open-label, single-arm pilot study to evaluate the efficacy of daily low dose tadalafil on depression in patients with erectile dysfunction. Transl Androl Urol 2019; 8:501-506. [PMID: 31807426 DOI: 10.21037/tau.2019.08.24] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Background Many studies have reported not only that depression and antidepressant medications can cause erectile dysfunction (ED), but also that having ED may increase the risk of depression. We investigated the effect of a daily low dose of a phosphodiesterase (PDE) type 5 inhibitor (tadalafil, 5 mg) on depression and levels of brain-derived neurotrophic factor (BDNF) in patients with ED. Methods Ten male patients with at least a 3-month history of ED [International Index of Erectile Function (IIEF)-5 score ≤21] and depression [the Korean version of the Patient Health Questionnaire (PHQ)-9 score ≥5] were analyzed in this study. The subjects were prescribed a low dose of a PDE5 inhibitor (tadalafil 5 mg) once daily for 8 weeks. The survey questionnaires were performed using the PHQ-15 and the PHQ-9 before and after administration of 8 weeks of tadalafil. Blood samples used for measuring serum BDNF levels were taken and measured at baseline and after 8 weeks of treatment. Results The mean changes in the PHQ-9 and PHQ-15 scores were 3.60±3.27 and 2.00±2.98, respectively. Analyses of the mean changes in the PHQ-9 scores revealed that the depressive symptoms of the subjects were significantly improved after administration of eight weeks of tadalafil (P<0.05). And, there was also a statistically significant increase in the PHQ-15 scores (P<0.05). Serum levels of BDNF were higher after tadalafil treatment compared to before treatment; however, this difference was not statistically significant. Conclusions The results of this prospective, clinical study suggest that daily low dose tadalafil may have a potential role in the treatment of depression in patients with ED.
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Affiliation(s)
- Jin Bong Choi
- Department of Urology, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kang Jun Cho
- Department of Urology, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Joon Chul Kim
- Department of Urology, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Chi-Un Pae
- Department of Psychiatry, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jun Sung Koh
- Department of Urology, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Role of Serum High-Sensitivity C-Reactive Protein as a Predictor of Therapeutic Response to Tadalafil in Patients With Erectile Dysfunction: A Prospective Observational Study. J Sex Med 2019; 16:1912-1921. [DOI: 10.1016/j.jsxm.2019.09.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 09/09/2019] [Accepted: 09/15/2019] [Indexed: 02/06/2023]
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Noland WE, Abzhabarov FZ. In situ vinylindole synthesis: Diels–Alder reactions with N-phenylmaleimides, 1-tetralones and 4-chromanones to give annulated tetrahydrocarbazoles. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1689572] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Wayland E. Noland
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
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Effect of Ticagrelor, a Cytochrome P450 3A4 Inhibitor, on the Pharmacokinetics of Tadalafil in Rats. Pharmaceutics 2019; 11:pharmaceutics11070354. [PMID: 31330787 PMCID: PMC6680770 DOI: 10.3390/pharmaceutics11070354] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 07/15/2019] [Accepted: 07/17/2019] [Indexed: 02/06/2023] Open
Abstract
Tadalafil is a cytochrome P450 (CYP) 3A4 substrate. Because there are few data on drug-drug interactions, it is advisable to take sufficient consideration when co-administering tadalafil with CYP3A4 inducers or inhibitors. This study was conducted to assess the effect of ticagrelor, a CYP3A4 inhibitor, on the pharmacokinetic properties of tadalafil after oral administration to rats. A total of 20 Sprague–Dawley male rats were randomly divided into the non-pretreated group and ticagrelor-pretreated group, and tadalafil was orally administered to each group after pretreatment with or without ticagrelor. Blood samples were collected at predetermined time points after oral administration of tadalafil. As a result, systemic exposure of tadalafil in the ticagrelor-pretreated group was significantly increased compared to the non-pretreated group (1.61-fold), and the clearance of tadalafil in the ticagrelor-pretreated group was significantly reduced than the non-pretreated group (37%). The prediction of the drug profile through the one-compartment model could explain the differences of pharmacokinetic properties of tadalafil in the non-pretreated and ticagrelor-pretreated groups. This study suggests that ticagrelor reduces a CYP3A-mediated tadalafil metabolism and that tadalafil and a combination regimen with tadalafil and ticagrelor requires dose control and specific pharmacotherapy.
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Pharmacokinetic interaction between linagliptin and tadalafil in healthy Egyptian males using a novel LC–MS method. Bioanalysis 2019; 11:1321-1336. [DOI: 10.4155/bio-2018-0097] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: Assessment of pharmacokinetic interaction between linagliptin (LNG) and tadalafil (TDL) in healthy males. Methods: First, a novel LC–MS method was developed; second, a Phase IV, open-label, cross-over study was performed. Volunteers took single 20-mg TDL dose on day 1 followed by wash out period of 2 weeks then multiple oral dosing of 5-mg/day LNG for 13 days. On day 13, volunteers were co-administered 20-mg TDL. Results: LNG and TDL single doses did not affect QTc interval. Smoking did not alter pharmacokinetics/pharmacodynamics of LNG and TDL. Co-administration of LNG with TDL resulted in TDL longer time to reach maximum plasma concentration (Tmax), decreased oral clearance (Cl/F) and oral volume of distribution (Vd/F), increased its maximum plasma concentration (Cmax), area under concentration-time curve (AUC), muscle pain and QTc prolongation. Conclusion: LNG and TDL co-administration warrants monitoring and/or TDL dose adjustment.
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de Oliveira MG, Rojas-Moscoso JA, Bertollotto GM, Candido TZ, Kiguti LRDA, Pupo AS, Antunes E, De Nucci G, Mónica FZ. Mirabegron elicits rat corpus cavernosum relaxation and increases in vivo erectile response. Eur J Pharmacol 2019; 858:172447. [PMID: 31228454 DOI: 10.1016/j.ejphar.2019.172447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 06/06/2019] [Accepted: 06/12/2019] [Indexed: 12/18/2022]
Abstract
Mirabegron is the first β3-adrenoceptor agonist approved on the market and may offer beneficial pharmacological action in patients with overactive bladder and erectile dysfunction. Here, we further investigate the mechanisms by which mirabegron induces rat corpus cavernosum (CC) relaxation. Adult male Wistar rats were used. The CC were isolated for in vitro functional assays and β-adrenoceptors subtypes mRNA expression evaluation. Animals were treated orally with mirabegron (30 mg/kg, 3 h), tadalafil (10 mg/kg, 3 h) or both for intracavernous pressure (ICP). Intracellular levels of cAMP and cGMP were also determined. The β1-, β2- and β3-adrenoceptors subtypes were expressed in rat CC. Mirabegron produced concentration-dependent CC relaxations that were unaffected by the β1-, β2- or β3-adrenoceptor antagonists atenolol (1 μM), ICI-118,551 (1 μM) and L748,337 (10 μM), respectively. Mirabegron-induced relaxations were not affected by the phosphodiesterase type 4 inhibitor, rolipram, or the adenylyl cyclase selective inhibitor, SQ 22,536. Potassium channel- or calcium influx-blockade are not involved in mirabegron-induced relaxations. In contrast, mirabegron produced rightward shifts in the contractile response induced by the α1-adrenoceptor agonist, phenylephrine. Finally, cavernous nerve stimulation caused frequency-dependent ICP increases, which were significantly increased in rats treated with mirabegron in a similar degree of tadalafil-treated rat, without promoting a significant cAMP or cGMP accumulation. Together, our results demonstrate that mirabegron induced CC relaxation through α1-adrenoceptor blockade. Care should be taken to translate the effect of mirabegron into the clinic, especially when using rat as an animal model of erectile dysfunction.
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Affiliation(s)
- Mariana G de Oliveira
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Brazil.
| | | | - Gabriela M Bertollotto
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Brazil
| | - Tuany Z Candido
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Brazil
| | - Luiz Ricardo de A Kiguti
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Brazil
| | - André S Pupo
- Department of Pharmacology, Institute of Biosciences, São Paulo State University (UNESP), Brazil
| | - Edson Antunes
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Brazil
| | - Gilberto De Nucci
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Brazil
| | - Fabíola Z Mónica
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Brazil
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Mobarak D, Salah S, Ghorab M. Improvement of dissolution of a class II poorly water-soluble drug, by developing a five-component self-nanoemulsifying drug delivery system. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2018.12.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Walton CJW, Thiebaut F, Brunzelle JS, Couture JF, Chica RA. Structural Determinants of the Stereoinverting Activity of Pseudomonas stutzeri d-Phenylglycine Aminotransferase. Biochemistry 2018; 57:5437-5446. [PMID: 30153007 DOI: 10.1021/acs.biochem.8b00767] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aromatic d-amino acids are key precursors for the production of many small molecule therapeutics. Therefore, the development of biocatalytic methods for their synthesis is of great interest. An enzyme that has great potential as a biocatalyst for the synthesis of d-amino acids is the stereoinverting d-phenylglycine aminotransferase (DPAT) from Pseudomonas stutzeri ST-201. This enzyme catalyzes a unique l to d transamination reaction that produces d-phenylglycine and α-ketoglutarate from benzoylformate and l-glutamate, via a mechanism that is poorly understood. Here, we present the crystal structure of DPAT, which shows that the enzyme folds into a two-domain structure representative of class III aminotransferases. Guided by the crystal structure, we performed saturation mutagenesis to probe the substrate binding pockets of the enzyme. These experiments helped us identify two arginine residues (R34 and R407), one in each binding pocket, that are essential to catalysis. Together with kinetic analyses using a library of amino acid substrates, our mutagenesis and structural studies allow us to propose a binding model that explains the dual l/d specificity of DPAT. Our kinetic analyses also demonstrate that DPAT can catalyze the transamination of β- and γ-amino acids, reclassifying this enzyme as an ω-aminotransferase. Collectively, our studies highlight that the DPAT active site is amenable to protein engineering for expansion of its substrate scope, which offers the opportunity to generate new biocatalysts for the synthesis of a variety of valuable optically pure d-amino acids from inexpensive and abundant l-amino acids.
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Affiliation(s)
- Curtis J W Walton
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , Ontario , Canada K1N 6N5.,Centre for Catalysis Research and Innovation , University of Ottawa , Ottawa , Ontario , Canada K1N 6N5
| | - Frédéric Thiebaut
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , Ontario , Canada K1N 6N5.,Centre for Catalysis Research and Innovation , University of Ottawa , Ottawa , Ontario , Canada K1N 6N5
| | - Joseph S Brunzelle
- Life Science Collaborative Access Team, Northwestern Synchrotron Research Centers , Northwestern University , Argonne , Illinois 60439 , United States
| | - Jean-François Couture
- Centre for Catalysis Research and Innovation , University of Ottawa , Ottawa , Ontario , Canada K1N 6N5.,Department of Biochemistry, Microbiology and Immunology, and Ottawa Institute of Systems Biology , University of Ottawa , Ottawa , Ontario , Canada K1H 8M5
| | - Roberto A Chica
- Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , Ontario , Canada K1N 6N5.,Centre for Catalysis Research and Innovation , University of Ottawa , Ottawa , Ontario , Canada K1N 6N5
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Wareham LK, Dordea AC, Schleifer G, Yao V, Batten A, Fei F, Mertz J, Gregory-Ksander M, Pasquale LR, Buys ES, Sappington RM. Increased bioavailability of cyclic guanylate monophosphate prevents retinal ganglion cell degeneration. Neurobiol Dis 2018; 121:65-75. [PMID: 30213732 DOI: 10.1016/j.nbd.2018.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 08/09/2018] [Accepted: 09/03/2018] [Indexed: 02/07/2023] Open
Abstract
The nitric oxide - guanylyl cyclase-1 - cyclic guanylate monophosphate (NO-GC-1-cGMP) pathway has emerged as a potential pathogenic mechanism for glaucoma, a common intraocular pressure (IOP)-related optic neuropathy characterized by the degeneration of retinal ganglion cells (RGCs) and their axons in the optic nerve. NO activates GC-1 to increase cGMP levels, which are lowered by cGMP-specific phosphodiesterase (PDE) activity. This pathway appears to play a role in both the regulation of IOP, where reduced cGMP levels in mice leads to elevated IOP and subsequent RGC degeneration. Here, we investigated whether potentiation of cGMP signaling could protect RGCs from glaucomatous degeneration. We administered the PDE5 inhibitor tadalafil orally (10 mg/kg/day) in murine models of two forms of glaucoma - primary open angle glaucoma (POAG; GC-1-/- mice) and primary angle-closure glaucoma (PACG; Microbead Occlusion Model) - and measured RGC viability at both the soma and axon level. To determine the direct effect of increased cGMP on RGCs in vitro, we treated axotomized whole retina and primary RGC cultures with the cGMP analogue 8-Br-cGMP. Tadalafil treatment increased plasma cGMP levels in both models, but did not alter IOP or mean arterial pressure. Nonetheless, tadalafil treatment prevented degeneration of RGC soma and axons in both disease models. Treatment of whole, axotomized retina and primary RGC cultures with 8-Br-cGMP markedly attenuated both necrotic and apoptotic cell death pathways in RGCs. Our findings suggest that enhancement of the NO-GC-1-cGMP pathway protects the RGC body and axon in murine models of POAG and PACG, and that enhanced signaling through this pathway may serve as a novel glaucoma treatment, acting independently of IOP.
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Affiliation(s)
- Lauren K Wareham
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA, USA; Vanderbilt Eye Institute, Vanderbilt University Medical Center, Nashville, TN 37232, United States
| | - Ana C Dordea
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA, USA
| | - Grigorij Schleifer
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA, USA
| | - Vincent Yao
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA, USA; Vanderbilt Eye Institute, Vanderbilt University Medical Center, Nashville, TN 37232, United States
| | - Annabelle Batten
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA, USA
| | - Fei Fei
- Vanderbilt Eye Institute, Vanderbilt University Medical Center, Nashville, TN 37232, United States
| | - Joseph Mertz
- Department of Ophthalmology, Wilmer Eye Institute, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Meredith Gregory-Ksander
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA 02114, United Sates
| | - Louis R Pasquale
- Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA
| | - Emmanuel S Buys
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA, USA
| | - Rebecca M Sappington
- Vanderbilt Eye Institute, Vanderbilt University Medical Center, Nashville, TN 37232, United States; Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, TN 37232, United States; Department of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN 37232, United States.
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Abstract
Tadalafil (Cialis) is one of the most commonly used phosphodiesterase type5 (PDE5) inhibitors. This work aimed to analyze the histological and ultrastructural changes provoked by chronic tadalafil administration in the rat retina, correlate between such changes and PDE5 immunoexpression and to evaluate the possible reversibility of these changes. Thirty Sprague Dawley male rats were randomly distributed into 3 groups. Control group; given 1 ml distilled water daily for 6 weeks. Tadalafil group; given tadalafil in a daily dose of 2.6 mg/kg for 6 weeks. Withdrawal group; given tadalafil 2.6 mg/kg daily for 6 week followed by a withdrawal period of 4 weeks. Retinal specimens were prepared for histological, ultrastructural and immunohistochemical study using anti-PDE5 and anti-Bcl-2 antibodies. Morphometric and statistical studies were performed. Tadalafil group displayed a significant reduction in retinal thickness, diminished cell population of outer and inner nuclear layers, dilated blood capillaries and a significant decline in the number of ganglion cells. Significant reductions of both PDE5 and Bcl-2 immunoexpression were observed. At the ultrastructural level, the photoreceptors showed spacing of outer segments and disorganized membranous discs. Retinal neurons showed ultrastructural degenerative changes in the form of shrunken irregular nuclei, dilated rER, and disrupted mitochondria. Withdrawal group revealed preservation of histological structure and partial restoration of retinal thickness, retinal cells ultrastructure, and PDE5 and Bcl-2 immunoexpressions. In conclusion, chronic use of tadalafil could induce reversible apoptotic and degenerative changes in retinal neurons due to its inhibitory effect on PDE5 expression which affects the metabolism and viability of retinal cells.
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Abstract
Sexual dysfunction affects both men and women and is responsible for 1 in 5 visits to urologist and/or gynecologists. It is important that treating providers use a logical and methodical approach to the diagnosis and treatment of this disorder. Behavioral therapy, coupled with oral medications, are very successful in treating erectile dysfunction. Complex and invasive therapies are used for more severe cases of sexual dysfunction and are best deployed by specialists.
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Affiliation(s)
- Nelson Bennett
- Department of Urology, Northwestern University Feinberg School of Medicine, Galter Pavilion Suite: 20-150, 675 North Saint Clair Street, Chicago, IL 60611, USA.
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Nilov DK, Yashina KI, Gushchina IV, Zakharenko AL, Sukhanova MV, Lavrik OI, Švedas VK. 2,5-Diketopiperazines: A New Class of Poly(ADP-ribose)polymerase Inhibitors. BIOCHEMISTRY (MOSCOW) 2018; 83:152-158. [DOI: 10.1134/s0006297918020074] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Effect of Tadalafil on Seizure Threshold and Activity of Antiepileptic Drugs in Three Acute Seizure Tests in Mice. Neurotox Res 2018; 34:333-346. [PMID: 29427285 PMCID: PMC6154210 DOI: 10.1007/s12640-018-9876-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 01/24/2018] [Accepted: 01/25/2018] [Indexed: 01/09/2023]
Abstract
Tadalafil, a selective phosphodiesterase type 5 inhibitor, is a long-acting oral agent for the treatment of erectile dysfunction of multiple etiologies. Although generalized tonic-clonic seizures were reported in a healthy man after taking tadalafil, the influence of tadalafil on seizure susceptibility has not been studied so far. Therefore, the aim of the present study was to investigate the effect of tadalafil on seizure threshold as well as on the activity of some first- and second-generation antiepileptic drugs in three acute seizure tests in mice. The obtained results showed that tadalafil, at the highest dose tested (20 mg/kg), significantly decreased the threshold for the first myoclonic twitch in the intravenous pentylenetetrazole (i.v. PTZ) seizure test. It did not affect the threshold for generalized clonic seizure and forelimb tonus in the i.v. PTZ, for tonic hindlimb extension in the maximal electroshock seizure threshold test, and for psychomotor seizure in the 6-Hz-induced seizure threshold test. Tadalafil did not alter the anticonvulsant activity of any of the studied antiepileptic drugs in electrically induced seizure tests. Interestingly, tadalafil potentiated the anticonvulsant activity of clonazepam and decreased the anticonvulsant activity of oxcarbazepine in the i.v. PTZ test. These interactions were pharmacodynamic in nature, as tadalafil did not alter clonazepam and oxcarbazepine concentrations both in serum and brain tissue. Furthermore, neither tadalafil alone nor its combinations with the studied antiepileptic drugs produced any significant impairment of motor coordination (assessed in the chimney test), muscular strength (investigated in the grip-strength test), and long-term memory (assessed in the passive avoidance task). In conclusion, tadalafil may increase the risk of myoclonic seizure and decrease the anticonvulsant efficacy of oxcarbazepine. Further studies are warranted to evaluate the safety of tadalafil usage in patients with epilepsy.
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Wietzikoski EGG, Foiatto JC, Czeczko NG, Malafaia O, Koleski FC, Mierzwa TC, Gomes RDPX. Tadalafil protector effect during ischemia-reperfusion in rats. Acta Cir Bras 2017; 32:973-983. [DOI: 10.1590/s0102-865020170110000009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Accepted: 10/08/2017] [Indexed: 05/29/2023] Open
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49
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Classical activation of macrophages and vardenafil. Clin Sci (Lond) 2017; 131:1141-1145. [DOI: 10.1042/cs20170137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 04/16/2017] [Accepted: 04/19/2017] [Indexed: 01/16/2023]
Abstract
Inhibitors of phosphodiesterase 5 (PDE5) – sildenafil citrate (Viagra; Pfizer) and vardenafil hydrochloride (Levitra; Bayer/GlaxoSmithKline) – approved for the treatment of erectile dysfunction and pulmonary arterial hypertension also rescue the loss of cystic fibrosis (CF) chloride channel function and the mislocalization of F508del-CFTR in affected tissues in CF. Can PDE5 inhibitors provide a therapeutic strategy which combines ability to correct the basic ion transport defect and to control de-regulated lung inflammation in CF?
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50
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Gandhi J, Weissbart SJ, Smith NL, Kaplan SA, Dagur G, Zumbo A, Joshi G, Khan SA. The impact and management of sexual dysfunction secondary to pharmacological therapy of benign prostatic hyperplasia. Transl Androl Urol 2017; 6:295-304. [PMID: 28540239 PMCID: PMC5422692 DOI: 10.21037/tau.2017.03.57] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Benign prostatic hyperplasia (BPH) is one of the most common genitourinary complications in men over 50 years of age and typically presents with lower urinary tract symptoms (LUTS). Classes of medications include α1-adrenoceptor blockers, 5α-reductase inhibitors, and phosphodiesterase 5 inhibitors. Today, α1-adrenoceptor blockers and 5α-reductase inhibitors are often combined to give a synergistic effect. A review of the current literature identified several adverse sexual side effects, including erectile dysfunction (ED), decreased libido, orgasmic disorders, and ejaculatory disorders. We believe it is important to know the extent of these side effects, as the clinician and patient will need to decide the cost of improved voiding symptoms. The chief adverse effect is ejaculatory disorders, including the absence of ejaculation. Clinical consideration for BPH should include the elements of male sexual function, patients’ age, and the characteristics and comprehensive effects of each group of drugs. Methodological bias in clinical studies, such as the subjective evaluation of the sexual side effect, makes it difficult to determine the ideal drug for treatment.
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Affiliation(s)
- Jason Gandhi
- Department of Physiology and Biophysics, Stony Brook University School of Medicine, Stony Brook, NY, USA
| | - Steven J Weissbart
- Department of Urology, Stony Brook University School of Medicine, Stony Brook, NY, USA
| | | | - Steven A Kaplan
- Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Men's Wellness Program, Mount Sinai Health System, New York, NY, USA
| | - Gautam Dagur
- Department of Physiology and Biophysics, Stony Brook University School of Medicine, Stony Brook, NY, USA
| | - Anna Zumbo
- University of Messina School of Medicine, Messina, Italy
| | - Gargi Joshi
- Department of Physiology and Biophysics, Stony Brook University School of Medicine, Stony Brook, NY, USA
| | - Sardar Ali Khan
- Department of Physiology and Biophysics, Stony Brook University School of Medicine, Stony Brook, NY, USA.,Department of Urology, Stony Brook University School of Medicine, Stony Brook, NY, USA
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