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  1. AU="Karasulu, Hatice Yeşim"
  2. AU="Zhilong Yan"

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  1. Article ; Online: Enhancing Oral Bioavailability of Domperidone Maleate: Formulation, In-Vitro Permeability Evaluation, In-Caco-2 cell Monolayers and In-Situ Rat Intestinal Permeability Studies.

    Üstündağ Okur, Neslihan / Çağlar, Emre Şefik / Kaynak, Mustafa Sinan / Diril, Mine / Özcan, Saniye / Karasulu, Hatice Yeşim

    Current drug delivery

    2023  

    Abstract: Background: The domperidone maleate, a lipophilic agent classified as a Biopharmaceutical Classification System Class II substance with weak water solubility. Self- Emulsifying Drug Delivery System is a novel approach to improve water solubility and, ... ...

    Abstract Background: The domperidone maleate, a lipophilic agent classified as a Biopharmaceutical Classification System Class II substance with weak water solubility. Self- Emulsifying Drug Delivery System is a novel approach to improve water solubility and, ultimately bioavailability of drugs.
    Objective: This study aimed to develop and characterize new domperidone-loaded self-emulsifying drug delivery systems as an alternative formulation and to evaluate the permeability of domperidone-loaded self-emulsifying drug delivery systems by using Caco-2 cells and via single-pass intestinal perfusion method.
    Method: Three self-emulsifying drug delivery systems were prepared and characterized in terms of pH, viscosity, droplet size, zeta potential, polydispersity index, conductivity, etc. Each formulation underwent 10, 100, 200, and 500 times dilution in intestinal buffer pH 6.8 and stomach buffer pH 1.2, respectively. Female Sprague Dawley rats were employed for in situ single-pass intestinal perfusion investigations.
    Results: Results of the study revealed that the ideal self-emulsifying drug delivery systems formulation showed narrow droplet size, ideal zeta potential, and no conductivity. Additionally, as compared to the control groups, the optimum formulation had better apparent permeability (12.74 ± 0.02×10-4) from Caco-2 cell monolayer permeability experiments. The study also revealed greater Peff values (2.122 ± 0.892×10-4 cm/s) for the optimal formulation from in situ intestinal perfusion analyses in comparison to control groups (Domperidone; 0.802±0.418×10-4 cm/s).
    Conclusion: To conclude, prepared formulations can be a promising way of oral administration of Biopharmaceutical Classification System Class II drugs.
    Language English
    Publishing date 2023-02-14
    Publishing country United Arab Emirates
    Document type Journal Article
    ZDB-ID 2185284-4
    ISSN 1875-5704 ; 1567-2018
    ISSN (online) 1875-5704
    ISSN 1567-2018
    DOI 10.2174/1567201820666230214091509
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Preparation, characterization and

    Ak, Güliz / Akartas, Irfan / Özel, Buket / Selvi Günel, Nur / Karasulu, Hatice Yeşim / Gümüştaş, Barış / Karasulu, Ercüment / Hamarat Şanlıer, Şenay

    Drug development and industrial pharmacy

    2021  Volume 47, Issue 8, Page(s) 1248–1260

    Abstract: The main objective of this study was to prepare cisplatin (CDDP) bound triblock polymeric micelle solution which will have a hydrophilic shell not being phagocytosed by mononuclear phagocyte system, and ... ...

    Abstract The main objective of this study was to prepare cisplatin (CDDP) bound triblock polymeric micelle solution which will have a hydrophilic shell not being phagocytosed by mononuclear phagocyte system, and evaluate
    MeSH term(s) Antineoplastic Agents/pharmacology ; Apoptosis ; Caco-2 Cells ; Cell Line, Tumor ; Cisplatin/pharmacology ; Female ; Humans ; Micelles ; Ovarian Neoplasms/drug therapy ; Polyethylene Glycols ; Polymers
    Chemical Substances Antineoplastic Agents ; Micelles ; Polymers ; Polyethylene Glycols (3WJQ0SDW1A) ; Cisplatin (Q20Q21Q62J)
    Language English
    Publishing date 2021-10-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 751874-2
    ISSN 1520-5762 ; 0363-9045
    ISSN (online) 1520-5762
    ISSN 0363-9045
    DOI 10.1080/03639045.2021.1989451
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Preparation and evaluation of microemulsion formulations of naproxen for dermal delivery.

    Ustündağ Okur, Neslihan / Yavaşoğlu, Altuğ / Karasulu, Hatice Yeşim

    Chemical & pharmaceutical bulletin

    2014  Volume 62, Issue 2, Page(s) 135–143

    Abstract: Naproxen (Np) is an example of a non-steroidal anti-inflammatory drug (NSAID) commonly used for the reduction of pain and inflammation. In order to develop an alternative formulation for the topical administration of Np, microemulsions were evaluated as ... ...

    Abstract Naproxen (Np) is an example of a non-steroidal anti-inflammatory drug (NSAID) commonly used for the reduction of pain and inflammation. In order to develop an alternative formulation for the topical administration of Np, microemulsions were evaluated as delivery vehicles. Four formulations were prepared using isopropyl myristate (IPM) as oil phase, Span 80, Labrafil M, Labrasol, Cremophor EL as surfactants, ethanol as co-surfactant and distilled water or 0.5 N NaOH solution as aqueous phase. The final concentration of Np in the microemulsion system was 100 mg/g (w/w). The physicochemical properties such as electrical conductivity, droplet size, viscosity, pH and phase inversion temperature of microemulsions were measured. Stability tests of the formulations were also performed at 5±2, 25±2 and 40±2°C. The abilities of various microemulsions and selected commercial (C) formulation to deliver Np through the skin were evaluated in vitro using diffusion cells fitted with rat skins. The in vitro permeation data showed that microemulsions increased the permeation rate of Np between 4.335-9.040 times over the C formulation. Furthermore Np successfully permeated across the skin from the microemulsion with the highest flux rate (1.347±0.005 mg·cm(-2)·h(-1)) from a formulation (M4Np) consisting of IPM (2.36 g), Labrosol (0.13 g), Span 80 (0.62 g), ethanol (5.23 g), 0.5 N NaOH solution (0.66 g) and Np (1 g). According to the histological investigations, no obvious skin irritation was observed for the studied microemulsions. These results indicate that the microemulsion formulation may be appropriate vehicles for the topical delivery of Np.
    MeSH term(s) Administration, Cutaneous ; Animals ; Anti-Inflammatory Agents, Non-Steroidal/administration & dosage ; Anti-Inflammatory Agents, Non-Steroidal/pharmacokinetics ; Emulsions/chemistry ; Emulsions/metabolism ; Male ; Myristates/chemistry ; Myristates/metabolism ; Naproxen/administration & dosage ; Naproxen/pharmacokinetics ; Pharmaceutical Vehicles/chemistry ; Pharmaceutical Vehicles/metabolism ; Rats ; Rats, Wistar ; Skin/metabolism ; Skin/ultrastructure ; Skin Absorption ; Surface-Active Agents/chemistry ; Surface-Active Agents/metabolism
    Chemical Substances Anti-Inflammatory Agents, Non-Steroidal ; Emulsions ; Myristates ; Pharmaceutical Vehicles ; Surface-Active Agents ; isopropyl myristate (0RE8K4LNJS) ; Naproxen (57Y76R9ATQ)
    Language English
    Publishing date 2014-01-17
    Publishing country Japan
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 213307-6
    ISSN 1347-5223 ; 0009-2363
    ISSN (online) 1347-5223
    ISSN 0009-2363
    DOI 10.1248/cpb.c13-00051
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: The novel oral imatinib microemulsions: physical properties, cytotoxicity activities and improved Caco-2 cell permeability.

    Gundogdu, Evren / Karasulu, Hatice Yesim / Koksal, Cinel / Karasulu, Ercüment

    Journal of microencapsulation

    2013  Volume 30, Issue 2, Page(s) 132–142

    Abstract: The objective of this study was to formulate imatinib (IM) loaded to water-in-oil (w/o) microemulsions as an alternative formulation for cancer therapy and to evaluate the cytotoxic effect of microemulsions Caco-2 and MCF-7. Moreover, permeability ... ...

    Abstract The objective of this study was to formulate imatinib (IM) loaded to water-in-oil (w/o) microemulsions as an alternative formulation for cancer therapy and to evaluate the cytotoxic effect of microemulsions Caco-2 and MCF-7. Moreover, permeability studies were also performed with Caco-2 cells. W/o microemulsion systems were developed by using pseudo-ternary phase diagram. According to cytotoxicity studies, all formulations did not exert a cytotoxic effect on Caco-2 cells. Furthermore, all formulations had a significant cytotoxic effect on MCF-7 cells and the cytotoxic effect of M3IM was significantly more than that of other microemulsions and IM solution (p < 0.05). The permeability studies of IM across Caco-2 cells showed that permeability value from apical to basolateral was higher than permeability value of other formulations. In conclusion, the microemulsion formulations as a drug carrier, especially M3IM formulation, may be used as an effective alternative breast cancer therapy for oral delivery of IM.
    MeSH term(s) Antineoplastic Agents/pharmacokinetics ; Antineoplastic Agents/pharmacology ; Benzamides/pharmacokinetics ; Benzamides/pharmacology ; Breast Neoplasms/drug therapy ; Caco-2 Cells ; Emulsions ; Female ; Humans ; Imatinib Mesylate ; Permeability ; Piperazines/pharmacokinetics ; Piperazines/pharmacology ; Pyrimidines/pharmacokinetics ; Pyrimidines/pharmacology
    Chemical Substances Antineoplastic Agents ; Benzamides ; Emulsions ; Piperazines ; Pyrimidines ; Imatinib Mesylate (8A1O1M485B)
    Language English
    Publishing date 2013
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 843632-0
    ISSN 1464-5246 ; 0265-2048
    ISSN (online) 1464-5246
    ISSN 0265-2048
    DOI 10.3109/02652048.2012.704952
    Database MEDical Literature Analysis and Retrieval System OnLINE

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