زواج المسيار: حقيقته و حكمه

The term “Nikah Misyar” (translated sometimes as “travellers’ marriage” or “marriage of convenience”) is not found in the Qur’an, Sunna or classical works of Islamic jurisprudence. It is a term that has been introduced recently. However, the concept can be found being discussed in the works of classical Muslim jurists (fuqaha). This is a marriage contract between a man and a woman, with the condition that the spouses give up one, two or several of their rights by their own free will. Some people consider that the misyar marriage can meet the needs of young people whose resources are too limited to settle down. However, there have been some (Sunni) scholars and organizations that have opposed the concept of Nikah Misyar altogether. As for the Islamic ruling concerning such marriages, there are two issues to consider: 1) Validity and permissibility; and 2) Appropriateness. Different scholars gave different opnions regarding these two imporatant issues. In this article, Nikah/zawaj Misyar was discussed in detail, describing different point of views and ruling in facvour and against Nikah Misyar.

Study of Inhibition of Carbonic Anhydrase Ii and Dpp-Iv As Possible Targets of Drug Discovery

Research on enzyme inhibitors has an enormous potential to introduce new drug candidates against enzyme related diseases. Keeping this in view, present study was designed to identify natural and synthetic compounds as leads against two clinically important enzymes, carbonic anhydrase-II (CA-II) and dipeptidyl peptidase-IV (DPP-IV). Carbonic anhydrases (CAs), and dipeptidyl peptidase-IV (DPP-IV) have pathological roles in the emergence of number of diseases, particularly glaucoma and diabetes, respectively. The results of the study are summarized below: PART A CA-II is an important enzyme for many physiological processes. Inhibitors of CA-II are used for the treatment of many diseases, such as epilepsy, mountain sickness, and glaucoma. During this study, over 350 fully characterized compounds were evaluated against BCA-II enzyme. Out of which 58 compounds showed a good inhibitory activity. Among these compounds, bisindoles and thiourea derivatives of bisindolyl showed the most significant activity with IC50 values in the range of 14.4 – 70.36 μM. To study the mechanism of action of inhibitors, most active inhibitors of these classes were further subjected to kinetic studies. Inhibition constants and type of inhibition were deduced by using Lineweaver-Burk plot, secondary re-plot of Lineweaver-Burk plot, and Dixon plot. Inhibition type and dissociation constants were deduced by Lineweaver-Burk plot, secondary re-plot, and Dixon plot. Bisindole derivatives, such as 23 (N-(4-(bis(5-chloro-1H-indol-3-yl)methyl)phenyl)-2,4-dinitrobenzenesulfonamide), 28 (N-(4-(bis(5-chloro-1H-indol-3-yl)methyl)phenyl)-3,5-dichloro-2-hydroxybenzenesulfonamide), and 38 (N-(4- (bis(5-bromo-1H-indol-3-yl)methyl)phenyl)-2,4-dinitrobenzenesulfonamide) showed a significant inhibition of enzyme CA-II (IC50 = 15.6 – 28.86 μM). To assess their safety profile, cytotoxic studies were conducted on mouse fibroblast cell line (3T3). Fortunately some of the good active compounds were found non-cytotoxic, and thus can serve as leads for further studies on CA inhibitor drug design and development. PART B Epidemic prevalence of diabetes at national and global level emphasizes the need of urgent therapeutic intervention. In the second part of our work, we targeted an important enzyme of incretin pathway, dipeptidyl peptidase-IV (DPP-IV). Inhibitors of DPP-IV occupy center stage in the current anti-diabetic drug market. We screened over 1,800 fully characterized natural and synthetic compounds, through a mechanism-based colorimetric assay. This led to the identification of 87 new inhibitors. Significant inhibition was shown by the compounds of semicarbazones, thiosemicarbazone, benzophenone Schiff bases classes, and gold complexes. New inhibitors, identified through initial screening, were further subjected to mechanism-based kinetic studies. Lineweaver-Burk plot, secondary re-plot of Lineweaver-Burk plot, and Dixon plots were constructed to determine the type of inhibition, inhibition constant, and other kinetic parameters. Cytotoxic studies of active compounds were also conducted on mouse fibroblast cell line (3T3). Some potent inhibitors were also subjected to in situ DPP-IV inhibition assay by using Caco-2 cellular model. Synthetic compounds of different classes and Gold complexes were found to be active. Compounds (R)-2-phenyl-2,3-dihydrobenzo [d] imidazo[2,1-b] thiazole gold (I) triphenylphosphine tetrafluoro borate (204), (S)-2-phenyl-2,3-dihydrobenzo[d]imidazo [2,1-b]thiazole gold (I) triphenylphosphine tetrafluoro borate (207), and (S)-2-phenyl-2,3-dihydrobenzo[d] imidazo [2,1-b] thiazole gold (I) chloride (209) were identified as most potent inhibitors with IC50 values in the range of 22.0 – 35.6 μM. Earlier studies on DPP-IV inhibitors were restricted to selected number of compounds with limited structural variations. Present study presents comprehensive screening of different classes of synthetic compounds for the discovery of new inhibitors of DPP-IV. This is a cost effective, easy, reliable, and fast approach for the discovery of new drug candidates.