The pharmaceutical combination of dexpanthenol (DPA), lidocaine hydrochloride (LIH) and mepyramine maleate (MAM) is used for their anti-allergic, anti-inflammatory, anti-pruritic, anesthetic and antiseptic properties. The present study was aimed to develop and validate a new, first and rapid high performance liquid chromatographic method for simultaneous determination of DPA, LIH and MAM in the presence of their stress-induced degradation products in pharmaceutical gel/fluigel formulations. The chromatographic separation was performed on an Inertsil ODS-3 V, 250 × 4.6 mm (5 μm) column using a gradient mobile phase of an aqueous solution of ammonium acetate (0.01 M) and methanol mixture at gradient flow rates of 1.3 mL/min and 1.5 mL/min with detection at 230 nm. The retention times for DPA, LIH and MAM were ~3.28 min, 11.67 min and 12.99 min, respectively. The method was validated in accordance with International Conference on Harmonisation guidelines. Calibration curves were linear in the ranges of 9-54 μg/mL for MAM and LIH and 30-180 μg/mL for DPA with satisfactory correlation coefficients (R2 > 0.999). The mean % recoveries obtained were found to be 99.9% for MAM, 100.3% for LIH and 99.3% for DPA. Precision % RSD was <2. Robustness results were uniform, there were no marked changes, so method is highly validated. All drugs were subjected to stress conditions and degradation products were separated with acceptable peak tailing (T ≤ 2) and good resolution (Rs > 2). The validated method therefore can be adapted for quality control procedures of the drugs in pharmaceutical dosage forms and their stability studies.

Amaç: 5, üzüm, asma, yer fıstığı, kızılcık, yaban mersini gibi birçok bitkisel kaynakta bulunan polifenolik bir bileşiktir. Resveratrol ile ilgili daha önceki araştırmalar kardiyovasküler sistemler, inflamasyon ve karsinogenez/kanser gelişimi ile ilgili farmakolojik etkileri üzerine odaklıyken son zamanlarda araştırmaların büyük çoğunluğu yaşlanma süreci, diyabet, alzheimer ve diğer nörodejeneratif hastalıklar üzerinde potansiyel etkileri keşfedilerek genişletilmiştir. Bu derleme kapsamında resveratrol hakkında genel bilgilerin, bulunduğu kaynakların ve özellikle son yıllarda üzerinde çalışılan biyolojik etkilerinin (in vitro, in vivo) derlenmesi amaçlanmıştır.Sonuç ve Tartışma: Resveratrolün yapısal olarak trans-formu baskındır. Bitkilerde daha stabil ve oksidatif bozunmaya karşı dayanıklı olan glikozitleri halinde bulunmaktadır. Resveratrol eldesinde sıklıkla kullanılan Polygonum cuspidatum bitkisinin çeşitli ekstreleri, ticari önemi olan ürünlerin ortaya çıkmasını sağlamıştır. Resveratrol başlıca antienflamatuvar, antioksidan, antikanser ve kardiyoprotektif etkilere sahip bir moleküldür. Yapılan farmakokinetik çalışmalarda resveratrolün iyi absorbe edildiği, ilk geçiş etkisi nedeniyle sülfat ve glukuronit konjugatları şeklinde hızla metabolize edildiği ve idrarla elimine edildiği bildirilmiştir. Ayrıca resveratrolün iyi tolere edildiği ve belirgin bir toksisite göstermediği rapor edilmiştir. Gıda/nutrasötik veya ilaç şeklinde alınabilen resveratrolün insan sağlığı üzerine olan çeşitli etkilerinden faydalanmak amacıyla biyoyararlanımı göz önüne alındığında iyi formüle edilmiş resveratrol taşıyan tablet, kapsül, nanopartikül formülasyonlarının hazırlanması ve kullanılması gerektiği sonucuna varılmıştır.

Natural products derived from plants have long been and will continue to be substantial sources of therapeutic agents in disease prevention and treatment. Resveratrol, which is a bioactive compound in a polyphenol structure, is found in significant amounts in several plant/food sources such as grapes, peanuts, strawberries, blueberries, pistachios, red mulberries, cranberries, and tomatoes. These functional foods rich in resveratrol be used widely owing to resveratrol does not show significant toxicity at low doses. Today, there is an increasing interest in polyphenols due to their antioxidant properties. The antioxidant effect of resveratrol underlies many of its medicinal effects, such as its neuroprotective and positive effect on neurodegeneration. In addition, it is outstanding with anti-inflammatory, antitumor, antiviral, antidiabetic, cardioprotective, and life-prolonging effects. Studies on resveratrol have previously focused on its pharmacological activities but recently have focused on its low bioavailability which poses a major problem to show the predicted effect.

No abstract

Rosmarinic acid is a valuable polyphenolic molecule mainly found in species of Boraginaceae and Lamiaceae. The amount of rosmarinic acid varies according to the environmental condition in which the plant grows, temperature, and humidity. The content of 0.01 to 72 mg/g of rosmarinic acid has been determined in various plants. Biotechnological production of rosmarinic acid by plant cell culture is recommended for its high production. The investigations have mainly addressed sources of rosmarinic acid, its production, and its biological effects. It has antioxidant, anti-inflammatory, antiviral, and anticancer activities, and it is an important substance for the pharmaceutical, food, and cosmetic industries. In addition to its antioxidant effects, it has been tested in recent studies in neurodegenerative diseases and has been found to have beneficial effects in these diseases, especially on memory. In this chapter, attention was drawn to the importance of rosmarinic acid, a valuable chemical, and general information about its phytochemistry, production, and biological activities was reviewed.