Publications by authors named "Pedro Ros Petrovick"

Unlabelled: Phyllanthus niruri L. belongs to the Euphorbiaceae, and is known by the common name of 'stonebreaker' in Brazil. Some species within the Phyllanthus genus are widely used in traditional medicine to counteract different types of anti-inflammatory diseases.

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Maytenus is the largest genus of the family Celastraceae and the species Maytenus ilicifolia (popularly known as 'Espinheira Santa'). It is widely used in traditional Brazilian medicine to treat stomach conditions including nausea, gastritis, and ulcers. In this study, the apoptotic effects of a spray-dried extract of M.

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The ability to induce apoptosis is an important marker for cytotoxic antitumor agents. Some natural compounds have been shown to modulate apoptosis pathways that are frequently blocked in human cancers, and therefore, these compounds provide novel opportunities for cancer drug development. Phyllanthus, a plant genus of the family Euphorbiaceae, exhibits multiple pharmacological actions.

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Article Synopsis
  • The study aimed to evaluate the combined cytotoxic effects of spray-dried extracts of Phyllanthus niruri and cisplatin on HT29 colorectal carcinoma and HepG2 liver cancer cell lines.
  • Researchers treated the cancer cells with varying concentrations of the extract and cisplatin for 4 and 24 hours, using flow cytometry to assess cell viability and cycle stages.
  • Results indicated that while each treatment had distinct effects on cancer cell survival, the combination showed increased efficacy, particularly with HepG2 cells when treated with both the extract and cisplatin.
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The purpose of this paper was to evaluate the compressional behavior of granules containing high load of a Phyllanthus niruri spray-dried extract in eccentric (ETM) and rotary (RTM) tablet presses. Tablets were constituted by spray-dried extract granules (SDEG, 92%), excipient granules (EXCG, 7.92%), and magnesium stearate (0.

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The aim of this study was to investigate the feasibility of using Eudragit E as a granulating agent for a spray-dried extract from Phyllanthus niruri to obtain tablets containing a high dose of this product. The granules were developed by wet granulation and contained 2.5%, 5.

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Optimization of CSD and CMC-Na in tablet formulations containing a high dose of SDE from was performed by central composite design (CCD) and response surface methodology (RSM). The study demonstrated that CSD affected mainly the hardness and friability, while CMC-Na modified the disintegration times. The optimum formula for minimum disintegration time and friability, and maximum crushing strength, was found to contain 1.

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The purpose of this research was to evaluate the influence of dry granulation parameters on granule and tablet properties of spray-dried extract (SDE) from Maytenus ilicifolia, which is widely used in Brazil in the treatment of gastric disorders. The compressional behavior of the SDE and granules of the SDE was characterized by Heckel plots. The tablet properties of powders, granules, and formulations containing a high extract dose were compared.

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A reversed-phase high-performance liquid chromatographic separation and quantitative method using a phosphoric acid-acetonitrile gradient was developed to analyze phenolic compounds present in aqueous extract from the aerial parts of Phyllanthus niruri. The chromatographic method was validated for linearity, precision and accuracy for both reference substance (gallic acid) and for three well resolved peaks from P. niruri aqueous extract.

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