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Synthesis of aryloxyacetylthiourea derivatives for the development of radicle elongation inhibitor of parasitic weeds. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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2
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López-Barona P, Verdú-Expósito C, Martín-Pérez T, Gómez-Casanova N, Lozano-Cruz T, Ortega P, Gómez R, Pérez-Serrano J, Heredero-Bermejo I. Amoebicidal activity of cationic carbosilane dendrons derived with 4-phenylbutyric acid against Acanthamoeba griffini and Acanthamoeba polyphaga trophozoites and cysts. Sci Rep 2022; 12:14926. [PMID: 36056060 PMCID: PMC9440212 DOI: 10.1038/s41598-022-19200-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 08/25/2022] [Indexed: 11/18/2022] Open
Abstract
Amoebae from the genus Acanthamoeba are important pathogens responsible for severe illnesses in humans such as Acanthamoeba keratitis and granulomatous amoebic encephalitis. In the last few decades, AK diagnoses have steadily increased. Most patients suffering from AK were contact lens users and the infection was related to poor hygiene. However, therapy is not yet well established, and treatments may last for several months due to resistance. Moreover, these treatments have been described to generate cytotoxicity. Therefore, there is an urgent need to develop new therapeutic strategies against AK. In this study, the amoebicidal activity of different generation cationic carbosilane dendrons derived with 4-phenylbutyric acid was demonstrated against Acanthamoeba polyphaga and Acanthamoeba griffini trophozoites and cysts. In addition, the combination of chlorhexidine digluconate and the most effective dendron (ArCO2G2(SNMe3I)4) showed an in vitro effect against Acanthamoeba trophozoites and cysts, reducing the minimal trophozoite amoebicidal concentration as well as concentrations with cysticidal activity.
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Affiliation(s)
- P López-Barona
- Department of Biomedicine and Biotechnology, Faculty of Pharmacy, University of Alcalá, 28871, Alcalá de Henares, Spain
| | - C Verdú-Expósito
- Department of Biomedicine and Biotechnology, Faculty of Pharmacy, University of Alcalá, 28871, Alcalá de Henares, Spain
| | - T Martín-Pérez
- Department of Biomedicine and Biotechnology, Faculty of Pharmacy, University of Alcalá, 28871, Alcalá de Henares, Spain
| | - N Gómez-Casanova
- Department of Biomedicine and Biotechnology, Faculty of Pharmacy, University of Alcalá, 28871, Alcalá de Henares, Spain
| | - T Lozano-Cruz
- Department of Organic and Inorganic Chemistry, Andrés M. del Río Chemistry Research Institute (IQAR), Ramón y Cajal Health Research Institute (IRYCIS), Bioengineering, Biomaterials and Nanomedicine Networking Research Center (CIBER-BBN), University of Alcalá, 28871, Madrid, Spain
| | - P Ortega
- Department of Organic and Inorganic Chemistry, Andrés M. del Río Chemistry Research Institute (IQAR), Ramón y Cajal Health Research Institute (IRYCIS), Bioengineering, Biomaterials and Nanomedicine Networking Research Center (CIBER-BBN), University of Alcalá, 28871, Madrid, Spain
| | - R Gómez
- Department of Organic and Inorganic Chemistry, Andrés M. del Río Chemistry Research Institute (IQAR), Ramón y Cajal Health Research Institute (IRYCIS), Bioengineering, Biomaterials and Nanomedicine Networking Research Center (CIBER-BBN), University of Alcalá, 28871, Madrid, Spain
| | - J Pérez-Serrano
- Department of Biomedicine and Biotechnology, Faculty of Pharmacy, University of Alcalá, 28871, Alcalá de Henares, Spain
| | - I Heredero-Bermejo
- Department of Biomedicine and Biotechnology, Faculty of Pharmacy, University of Alcalá, 28871, Alcalá de Henares, Spain.
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3
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Ahmed U, Anwar A, Ong SK, Anwar A, Khan NA. Applications of medicinal chemistry for drug discovery against Acanthamoeba infections. Med Res Rev 2021; 42:462-512. [PMID: 34472107 DOI: 10.1002/med.21851] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 07/13/2021] [Accepted: 08/17/2021] [Indexed: 01/16/2023]
Abstract
Acanthamoeba is a genus of free-living amoebae, pervasively found in the environment. Most of its pathogenic species are the causative agent of sight-threatening Acanthamoeba keratitis and fatal granulomatous amoebic encephalitis. Despite the advancements in the field of chemotherapy, treating Acanthamoeba infections is still challenging due to incomplete knowledge of the complicated pathophysiology. In case of infection, the treatment regimen for the patients is often ineffective due to delayed diagnosis, poor specificity, and side-effects. Besides the resistance of Acanthamoeba cysts to most of the drugs, the recurrence of infection further complicates the recovery. Thus, it is necessary to develop an effective treatment which can eradicate these rare, but serious infections. Based on various computational and in vitro studies, it has been established that the synthetic scaffolds such as heterocyclic compounds may act as potential drug leads for the development of antiamoebic drugs. In this review, we report different classes of synthetic compounds especially heterocyclic compounds which have shown promising results against Acanthamoeba. Moreover, the antiamoebic activities of synthetic compounds with their possible mode of actions against Acanthamoeba, have been summarized and discussed in this review.
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Affiliation(s)
- Usman Ahmed
- Department of Biological Sciences, School of Medical and Life Sciences, Sunway University, Subang Jaya, Selangor, Malaysia
| | - Ayaz Anwar
- Department of Biological Sciences, School of Medical and Life Sciences, Sunway University, Subang Jaya, Selangor, Malaysia
| | - Seng-Kai Ong
- Department of Biological Sciences, School of Medical and Life Sciences, Sunway University, Subang Jaya, Selangor, Malaysia
| | - Areeba Anwar
- Faculty of Defence Science and Technology, National Defence University of Malaysia, Kuala Lampur, Malaysia
| | - Naveed Ahmed Khan
- Department of Clinical Sciences, College of Medicine, University of Sharjah, Sharjah, UAE
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4
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Heredero-Bermejo I, Martín-Pérez T, Copa-Patiño JL, Gómez R, de la Mata FJ, Soliveri J, Pérez-Serrano J. Ultrastructural Study of Acanthamoeba polyphaga Trophozoites and Cysts Treated In Vitro with Cationic Carbosilane Dendrimers. Pharmaceutics 2020; 12:pharmaceutics12060565. [PMID: 32570829 PMCID: PMC7356815 DOI: 10.3390/pharmaceutics12060565] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/15/2020] [Accepted: 06/16/2020] [Indexed: 11/16/2022] Open
Abstract
Cationic carbosilane dendrimers are branched molecules with antimicrobial properties. Their activity has been tested against Acanthamoeba polyphaga, a causative agent of Acanthamoeba keratitis, a severe ocular disease in humans. A. polyphaga trophozoites and cysts were exposed to different noncytotoxic cationic carbosilane dendrimers with proven antiamoebic activity. The effects of treatment on cell surface and cell ultrastructure were examined by scanning and transmission electron microscopy, respectively. Two of the dendrimers tested induced dramatic alterations of cellular ultrastructure in both trophozoites and cysts, including vacuolization, depletion of cytoplasmic contents, and reduced cell size. Additionally, we observed severe alterations of the plasma membrane with membrane blebbing in trophozoites and disruption in cysts. These alterations were also observed with chlorhexidine, a drug used for treatment of Acanthamoeba keratitis. Our results support that these compounds may target membranes, and their action is critical for parasite integrity.
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Affiliation(s)
- Irene Heredero-Bermejo
- Department of Biomedicine and Biotechnology, Faculty of Pharmacy, University of Alcalá, Alcalá de Henares, 28805 Madrid, Spain; (T.M.-P.); (J.L.C.-P.); (J.S.); (J.P.-S.)
- Correspondence:
| | - Tania Martín-Pérez
- Department of Biomedicine and Biotechnology, Faculty of Pharmacy, University of Alcalá, Alcalá de Henares, 28805 Madrid, Spain; (T.M.-P.); (J.L.C.-P.); (J.S.); (J.P.-S.)
| | - José Luis Copa-Patiño
- Department of Biomedicine and Biotechnology, Faculty of Pharmacy, University of Alcalá, Alcalá de Henares, 28805 Madrid, Spain; (T.M.-P.); (J.L.C.-P.); (J.S.); (J.P.-S.)
| | - Rafael Gómez
- Department of Organic and Inorganic Chemistry, Research Institute on Chemistry “Andrés M. del Río” (IQAR), University of Alcalá, Alcalá de Henares, 28805 Madrid, Spain; (R.G.); (F.J.d.l.M.)
- Institute “Ramón y Cajal” for Health Research (IRYCIS), 28034 Madrid, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) ISCIII, 28029 Madrid, Spain
| | - Francisco Javier de la Mata
- Department of Organic and Inorganic Chemistry, Research Institute on Chemistry “Andrés M. del Río” (IQAR), University of Alcalá, Alcalá de Henares, 28805 Madrid, Spain; (R.G.); (F.J.d.l.M.)
- Institute “Ramón y Cajal” for Health Research (IRYCIS), 28034 Madrid, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN) ISCIII, 28029 Madrid, Spain
| | - Juan Soliveri
- Department of Biomedicine and Biotechnology, Faculty of Pharmacy, University of Alcalá, Alcalá de Henares, 28805 Madrid, Spain; (T.M.-P.); (J.L.C.-P.); (J.S.); (J.P.-S.)
| | - Jorge Pérez-Serrano
- Department of Biomedicine and Biotechnology, Faculty of Pharmacy, University of Alcalá, Alcalá de Henares, 28805 Madrid, Spain; (T.M.-P.); (J.L.C.-P.); (J.S.); (J.P.-S.)
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5
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The Partner Does Matter: The Structure of Heteroaggregates of Acridine Orange in Water. Molecules 2019; 24:molecules24152816. [PMID: 31382361 PMCID: PMC6696166 DOI: 10.3390/molecules24152816] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/01/2019] [Accepted: 08/01/2019] [Indexed: 02/04/2023] Open
Abstract
Self-assembly of organic molecules in aqueous solutions is governed by a delicate entropy/enthalpy balance. Even small changes in their intermolecular interactions can cause critical changes in the structure of the aggregates and their spectral properties. The experimental results reported here demonstrate that protonated cations of acridine orange, acridine, and acridin-9-amine form stable J-heteroaggregates when in water. The structures of these aggregates are justified by the homonuclear 1H cross-relaxation nuclear magnetic resonance (NMR). The absorption and fluorescence of these aggregates deviate characteristically from the known H-homoaggregates of the protonated cations of acridine orange. The latter makes acridine orange a handy optical sensor for soft matter studies.
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Bunsuwansakul C, Mahboob T, Hounkong K, Laohaprapanon S, Chitapornpan S, Jawjit S, Yasiri A, Barusrux S, Bunluepuech K, Sawangjaroen N, Salibay CC, Kaewjai C, de Lourdes Pereira M, Nissapatorn V. Acanthamoeba in Southeast Asia - Overview and Challenges. THE KOREAN JOURNAL OF PARASITOLOGY 2019; 57:341-357. [PMID: 31533401 PMCID: PMC6753290 DOI: 10.3347/kjp.2019.57.4.341] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Revised: 07/18/2019] [Accepted: 07/18/2019] [Indexed: 12/21/2022]
Abstract
Acanthamoeba, one of free-living amoebae (FLA), remains a high risk of direct contact with this protozoan parasite which is ubiquitous in nature and man-made environment. This pathogenic FLA can cause sight-threatening amoebic keratitis (AK) and fatal granulomatous amoebic encephalitis (GAE) though these cases may not commonly be reported in our clinical settings. Acanthamoeba has been detected from different environmental sources namely; soil, water, hot-spring, swimming pool, air-conditioner, or contact lens storage cases. The identification of Acanthamoeba is based on morphological appearance and molecular techniques using PCR and DNA sequencing for clinico-epidemiological purposes. Recent treatments have long been ineffective against Acanthamoeba cyst, novel anti-Acanthamoeba agents have therefore been extensively investigated. There are efforts to utilize synthetic chemicals, lead compounds from medicinal plant extracts, and animal products to combat Acanthamoeba infection. Applied nanotechnology, an advanced technology, has shown to enhance the anti-Acanthamoeba activity in the encapsulated nanoparticles leading to new therapeutic options. This review attempts to provide an overview of the available data and studies on the occurrence of pathogenic Acanthamoeba among the Association of Southeast Asian Nations (ASEAN) members with the aim of identifying some potential contributing factors such as distribution, demographic profile of the patients, possible source of the parasite, mode of transmission and treatment. Further, this review attempts to provide future direction for prevention and control of the Acanthamoeba infection.
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Affiliation(s)
- Chooseel Bunsuwansakul
- School of Allied Health, Southeast Asia Water Team (SEA Water Team) and World Union for Herbal Drug Discovery (WUHeDD), Walailak University, Nakhon Si Thammarat, Thailand
| | - Tooba Mahboob
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Kruawan Hounkong
- Department of Microbiology, Princess of Naradhiwas University, Narathiwat, Thailand
| | | | | | - Siriuma Jawjit
- School of Public Health, Walailak University, Nakhon Si Thammarat, Thailand
| | - Atipat Yasiri
- Chulabhorn International College of Medicine, Thammasat University, Pathum Thani, Thailand
| | - Sahapat Barusrux
- School of Allied Health, Southeast Asia Water Team (SEA Water Team) and World Union for Herbal Drug Discovery (WUHeDD), Walailak University, Nakhon Si Thammarat, Thailand
| | - Kingkan Bunluepuech
- School of Allied Health, Southeast Asia Water Team (SEA Water Team) and World Union for Herbal Drug Discovery (WUHeDD), Walailak University, Nakhon Si Thammarat, Thailand
| | | | - Cristina C. Salibay
- College of Science and Computer Studies, De La Salle University-Dasmarinas, Dasmarinas City, Cavite, Philippines
| | - Chalermpon Kaewjai
- Faculty of Medical Technology, Rangsit University, Pathum Thani, Thailand
| | - Maria de Lourdes Pereira
- Department of Medical Sciences & CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Veeranoot Nissapatorn
- School of Allied Health, Southeast Asia Water Team (SEA Water Team) and World Union for Herbal Drug Discovery (WUHeDD), Walailak University, Nakhon Si Thammarat, Thailand
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7
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Limban C, Missir AV, Caproiu MT, Grumezescu AM, Chifiriuc MC, Bleotu C, Marutescu L, Papacocea MT, Nuta DC. Novel Hybrid Formulations Based on Thiourea Derivatives and Core@Shell Fe₃O₄@C 18 Nanostructures for the Development of Antifungal Strategies. NANOMATERIALS 2018; 8:nano8010047. [PMID: 29342119 PMCID: PMC5791134 DOI: 10.3390/nano8010047] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 12/22/2017] [Accepted: 01/05/2018] [Indexed: 12/21/2022]
Abstract
The continuously increasing global impact of fungal infections is requiring the rapid development of novel antifungal agents. Due to their multiple pharmacological activities, thiourea derivatives represent privileged candidates for shaping new drugs. We report here the preparation, physico-chemical characterization and bioevaluation of hybrid nanosystems based on new 2-((4-chlorophenoxy)methyl)-N-(substituted phenylcarbamo-thioyl)benzamides and Fe3O4@C18 core@shell nanoparticles. The new benzamides were prepared by an efficient method, then their structure was confirmed by spectral studies and elemental analysis and they were further loaded on Fe3O4@C18 nanostructures. Both the obtained benzamides and the resulting hybrid nanosystems were tested for their efficiency against planktonic and adherent fungal cells, as well as for their in vitro biocompatibility, using mesenchymal cells. The antibiofilm activity of the obtained benzamides was dependent on the position and nature of substituents, demonstrating that structure modulation could be a very useful approach to enhance their antimicrobial properties. The hybrid nanosystems have shown an increased efficiency in preventing the development of Candida albicans (C. albicans) biofilms and moreover, they exhibited a good biocompatibility, suggesting that Fe3O4@C18core@shell nanoparticles could represent promising nanocarriers for antifungal substances, paving the way to the development of novel effective strategies with prophylactic and therapeutic value for fighting biofilm associated C. albicans infections.
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Affiliation(s)
- Carmen Limban
- Department of Pharmaceutical Chemistry, "Carol Davila" University of Medicine and Pharmacy, Traian Vuia No. 6, 020956 Bucharest, Romania.
| | - Alexandru Vasile Missir
- Department of Pharmaceutical Chemistry, "Carol Davila" University of Medicine and Pharmacy, Traian Vuia No. 6, 020956 Bucharest, Romania.
| | - Miron Teodor Caproiu
- The Organic Chemistry Center of Romanian Academy "Costin D. Nenitescu" Bucharest, Splaiul Independentei, 202B, 77208 Bucharest, Romania.
| | - Alexandru Mihai Grumezescu
- Department of Science and Engineering of Oxidic Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Polizu Street No. 1-7, 011061 Bucharest, Romania.
| | - Mariana Carmen Chifiriuc
- Department of Microbiology, Faculty of Biology, University of Bucharest, Aleea Portocalelor No. 1-3, 060101 Bucharest, Romania.
- Research Institute of the University of Bucharest, University of Bucharest, Spl. Independentei 91-95, R-76201 Bucharest, Romania.
| | - Coralia Bleotu
- Stefan Nicolau Institute of Virology, 030304 Bucharest, Romania.
| | - Luminita Marutescu
- Department of Microbiology, Faculty of Biology, University of Bucharest, Aleea Portocalelor No. 1-3, 060101 Bucharest, Romania.
- Research Institute of the University of Bucharest, University of Bucharest, Spl. Independentei 91-95, R-76201 Bucharest, Romania.
| | - Marius Toma Papacocea
- Department of Neurosurgery, "Sf. Pantelimon," Emergency Hospital, "Carol Davila" University of Medicine and Pharmacy, 021659 Bucharest, Romania.
| | - Diana Camelia Nuta
- Department of Pharmaceutical Chemistry, "Carol Davila" University of Medicine and Pharmacy, Traian Vuia No. 6, 020956 Bucharest, Romania.
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Abd Halim AN, Ngaini Z. Synthesis and characterization of halogenated bis(acylthiourea) derivatives and their antibacterial activities. PHOSPHORUS SULFUR 2017. [DOI: 10.1080/10426507.2017.1315421] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ainaa Nadiah Abd Halim
- Department of Chemistry, Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia
| | - Zainab Ngaini
- Department of Chemistry, Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia
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Raheel A, Imtiaz-ud-Din, Andleeb S, Ramadan S, Tahir MN. Synthesis and structural characterization of new bioactive ligands and their Bi(III) derivatives. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3632] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Ahmad Raheel
- Department of Chemistry; Quaid-i-Azam University; Islamabad 45320 Pakistan
| | - Imtiaz-ud-Din
- Department of Chemistry; Quaid-i-Azam University; Islamabad 45320 Pakistan
| | - Sohaila Andleeb
- Department of Chemistry; Quaid-i-Azam University; Islamabad 45320 Pakistan
| | - Simko Ramadan
- Department of Chemistry; University of Manchester; Manchester UK
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Odame F, Hosten EC, Betz R, Lobb K, Tshentu ZR. Characterization of some amino acid derivatives of benzoyl isothiocyanate: Crystal structures and theoretical prediction of their reactivity. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.05.053] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Heredero-Bermejo I, Copa-Patiño JL, Soliveri J, Fuentes-Paniagua E, de la Mata FJ, Gomez R, Perez-Serrano J. Evaluation of the activity of new cationic carbosilane dendrimers on trophozoites and cysts of Acanthamoeba polyphaga. Parasitol Res 2014; 114:473-86. [PMID: 25358240 DOI: 10.1007/s00436-014-4205-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 10/22/2014] [Indexed: 01/16/2023]
Abstract
Dendrimers are repetitively branched molecules with a broad spectrum of applications, mainly for their antimicrobial properties and as nanocarriers for other molecules. Recently, our research group have synthesized and studied their activity against Acanthamoeba sp., causative agent of a severe ocular disease in humans: Acanthamoeba keratitis. New cationic carbosilane dendrimers were tested against the protozoa forms at different concentrations and for different incubation times. Trophozoite viability was determined by manual counting and cyst viability by observing excystment in microplates with fresh culture medium. Cytotoxicity was checked on HeLa cells using the microculture tetrazolium assay. Alterations were observed by optical microscopy and by flow cytometry staining with propidium iodide. Six out of the 18 dendrimers tested were non-cytotoxic and effective against the trophozoite form, having one of them (dendrimer 14 with an IC50 of 2.4 + 0.1 mg/L) a similar activity to chlorhexidine digluconate (IC50 1.7 + 0.1 mg/L). This dendrimer has a polyphenoxo core and a sulphur atom close to the six -NH3+ terminal groups. On the other hand, only two dendrimers showed some effect against cysts (dendrimers 14 and 17). However, their minimum cysticidal concentrations were cytotoxic and less effective than the control drug. The alterations on the amoeba morphology produced by the treatment with dendrimers were size reduction, increased complexity, loss of acanthopodia and cell membrane disruption. In conclusion, these results suggest that some dendrimers may be studied in animal models to test their effect and that new dendrimers with similar features should be synthesized.
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Affiliation(s)
- Irene Heredero-Bermejo
- Departamento de Biomedicina y Biotecnología, Universidad de Alcalá, Alcalá de Henares, Spain,
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12
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Biopharmaceutical profiling of new antitumor pyrazole derivatives. Molecules 2014; 19:16381-401. [PMID: 25314601 PMCID: PMC6271227 DOI: 10.3390/molecules191016381] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 09/26/2014] [Accepted: 09/29/2014] [Indexed: 11/16/2022] Open
Abstract
Several new pyrazole derivatives have demonstrated promising antiproliferative and cytotoxic effects, but their poor solubility raised concerns over possible biopharmaceutical limitations. In order to improve their pharmaceutical potential we performed the biopharmaceutical profiling for nine pyrazole compounds using in vitro and computational methods. The experimental solubility was determined in five different media using a validated HPLC method. Although the experimental solubility was lower than the predicted one, a good linear relationship was observed. The results also indicated a minimal impact of endogenous tensioactives on solubility, suggesting dissolution rate limited absorption. The in silico experiments were focused on identification of molecular determinants of solubility, evaluation of drug-likeness, prediction of in vivo absorption based on mechanistic models, as well as identification of the main factors that could impact on the oral bioavailability. The results suggested that dose, solubility and particle size are the main determinants of absorption, whereas permeability has little effect, confirming the BCS Class II behavior of the compounds. The present investigation was able to rank the tested compounds in terms of biopharmaceutical behavior, and indicated the B3 series compounds as having a more favorable absorption profile making them the main candidates for advance to the pre-clinical in vivo studies.
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13
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Zhang H, Liu RQ, Liu KC, Li QB, Li QY, Liu SZ. A one-pot approach to pyridyl isothiocyanates from amines. Molecules 2014; 19:13631-42. [PMID: 25185069 PMCID: PMC6271198 DOI: 10.3390/molecules190913631] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Revised: 08/27/2014] [Accepted: 08/28/2014] [Indexed: 11/16/2022] Open
Abstract
A one-pot preparation of pyridyl isothiocyanates (ITCs) from their corresponding amines has been developed. This method involves aqueous iron(III) chloride-mediated desulfurization of a dithiocarbamate salt that is generated in situ by treatment of an amine with carbon disulfide in the present of DABCO or sodium hydride. The choice of base is of decisive importance for the formation of the dithiocarbamate salts. This one-pot process works well for a wide range of pyridyl ITCs. Utilizing this protocol, some highly electron-deficient pyridyl and aryl ITCs are obtained in moderate to good yields.
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Affiliation(s)
- Hao Zhang
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
| | - Rui-Quan Liu
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
| | - Ke-Chang Liu
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
| | - Qi-Bo Li
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
| | - Qing-Yang Li
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
| | - Shang-Zhong Liu
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
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