جستجوی مقالات مرتبط با کلیدواژه "thebaine" در نشریات گروه "پزشکی"

In this study, a fast and precise method for determining three opium alkaloids (morphine, codeine, and thebaine) in different parts of some Papaver species was developed and validated with a low limit of detection (LOD) of 0.05 - 0.20 mg/L. The proposed method was based on three extraction steps by alkaline aqueous solution/chloroform/acidic aqueous solution and analysis by ion mobility spectrometry (IMS) and high-performance liquid chromatography (HPLC). After optimizing IMS parameters based on an experimental design, IMS was applied to analyze the extracts of seeds, stems, leaves, and capsules of seven Papaver species collected from different regions of Iran. All prepared samples were analyzed by HPLC and IMS at the same time. Then, the obtained results of the two instrumental methods were compared. The HPLC did not detect morphine in the prepared samples, while IMS results showed trace amounts of morphine in the capsules and leaves of four Papaver species. Other results were comparable and showed that IMS is more sensitive, affordable, and faster than HPLC for alkaloid analysis.

In this study, a fast and precise method for determining three opium alkaloids (morphine, codeine, and thebaine) in different parts of some Papaver species was developed and validated with a low limit of detection (LOD) of 0.05 - 0.20 mg/L. The proposed method was based on three extraction steps by alkaline aqueous solution/chloroform/acidic aqueous solution and analysis by ion mobility spectrometry (IMS) and high-performance liquid chromatography (HPLC). After optimizing IMS parameters based on an experimental design, IMS was applied to analyze the extracts of seeds, stems, leaves, and capsules of seven Papaver species collected from different regions of Iran. All prepared samples were analyzed by HPLC and IMS at the same time. Then, the obtained results of the two instrumental methods were compared. The HPLC did not detect morphine in the prepared samples, while IMS results showed trace amounts of morphine in the capsules and leaves of four Papaver species. Other results were comparable and showed that IMS is more sensitive, affordable, and faster than HPLC for alkaloid analysis.

Papaver bracteatum Lindl. (Persian poppy) has a very long history as the major source of natural alkaloids. Among Papaver species, Persian poppy can be considered as a rich source of thebaine.

The purpose of this study was to evaluate the thebaine content in different organs and different populations of Persian poppy.

Seven populations of Persian poppy were collected from five different geographical regions of Iran including Damavand (Rineh, Abask), Chalous (Yoush, Pol-e Zanguleh), Mahabad, Meshgin Shahr and Zanjan (Taham) and were screened for its thebaine content. Extraction of thebaine was performed using the ultrasonic-assisted extraction (UAE) method. The parameters including pH, amount of solvent, extraction temperature and time, the repetition of extraction cycles and also the particle size were investigated and optimal conditions were determined to reach the maximum efficiency. Also, the correlation between phenology of the plant and thebaine content was studied during the developmental stages of poppy from pre-flowering to lancing. The developed UAE method followed by high performance liquid chromatography (HPLC) was used for quantitative analysis.

Thebaine content was significantly different in various organs and populations grew at different regions. The thebaine content was in the range of 0.9-1.4 % and 0.1-0.45 % in capsules and stems, respectively. The highest thebaine content was obtained in the capsules of Mahabad population.

Extraction led to a high purity thebaine from Persian poppy. Eventually, a comprehensive profile of thebaine in different Persian poppy populations from different geographical regions in Iran was released.

Papaver bracteatum Lindl. Commonly known as Iranian poppy is an important medicinal plant due to the presence of benzylisoquinoline alkaloids.
To evaluate the hairy root culture as a novel method for thebaine production.
To optimize the hairy root culture of P. bracteatum, five strains of Agrobacterium rhizogenes (ATCC15834, C318, A13, 9453 and A4) were used by means of Sonication-Assisted Agrobacterium-mediated Transformation (SAAT).
Strain C318 proved to be more efficient than the other strains to hairy root induction ability. Among different experimental conditions, the highest transformation rate (28.5 %) was observed 4 weeks after inoculation, once the explants were subjected to sonication (45 s) following a heat treatment of 41°C for 5 min. Transgenic status of the hairy roots was confirmed by PCR using rolB specific primers.
Strain C318 proved to be more efficient than the other strains to hairy root induction ability. Among different experimental conditions, the highest transformation rate (28.5 %) was observed 4 weeks after inoculation, once the explants were subjected to sonication (45 s) following a heat treatment of 41°C for 5 min. Transgenic status of the hairy roots was confirmed by PCR using rolB specific primers.

Papaver bracteatum Lindly (Papaveraceae) is an endemic species of Iran which has economic importance in drug industries. The main alkaloid of the plant is thebaine which is used as a precursor of the semi-synthetic and synthetic compounds including codeine and naloxone, respectively. This systematic review focuses on main component of Papaver bracteatum and methods used to determine thebaine. All studies which assessed the potential effect of the whole plant or its extract on clinical or preclinical studies were reviewed. In addition, methods for determination of the main components, especially thebaine, which have been published from 1948 to March 2013, were included. Exclusion criteria were agricultural studies that did not assess. This study has listed alkaloids identified in P. bracteatum which reported since 1948 to 2013. Also, the biological activities of main compounds of Papaver bracteatum including thebaine, isothebaine, (-)-nuciferine have been reviewed. As thebaine has many medicinal and industrial values, determination methods of thebaine in P. bracteatum were summarized. The methods have being used for determination of thebaine include chromatographic (HPLC, GC and TLC) and non chromatographic methods. HPLC methods seem to be the best method from the angle of time consuming, cost and data accuracy and precision.