Due to their chemical properties and biological activity, antioxidants of plant origin have gained interest as valuable components of the human diet, potential food preservatives and additives, ingredients of cosmetics and factors implicated in tolerance mechanisms against environmental stress. Plant polyphenols are the most prominent and extensively studied, albeit not only group of, secondary plant (specialized) metabolites manifesting antioxidative activity. Because of their potential economic importance, the productive and renewable sources of the compounds are desirable. Over thirty years of research on hairy root cultures, as both producers of secondary plant metabolites and experimental systems to investigate plant biosynthetic pathways, brought about several spectacular achievements. The present review focuses on the Rhizobium rhizogenes-transformed roots that either may be efficient sources of plant-derived antioxidants or were used to elucidate some regulatory mechanisms responsible for the enhanced accumulation of antioxidants in plant tissues.

Plant-derived antioxidants are intrinsic components of human diet and factors implicated in tolerance mechanisms against environmental stresses in both plants and humans. They are being used as food preservatives and additives or ingredients of cosmetics. For nearly forty years, Rhizobium rhizogenes-transformed roots (hairy roots) have been studied in respect to their usability as producers of plant specialized metabolites of different, primarily medical applications. Moreover, the hairy root cultures have proven their value as a tool in crop plant improvement and in plant secondary metabolism investigations. Though cultivated plants remain a major source of plant polyphenolics of economic importance, the decline in biodiversity caused by climate changes and overexploitation of natural resources may increase the interest in hairy roots as a productive and renewable source of biologically active compounds. The present review examines hairy roots as efficient producers of simple phenolics, phenylethanoids, and hydroxycinnamates of plant origin and summarizes efforts to maximize the product yield. Attempts to use Rhizobium rhizogenes-mediated genetic transformation for inducing enhanced production of the plant phenolics/polyphenolics in crop plants are also mentioned.

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BACKGROUND. According to a 2019 epidemiological study, antibiotic resistance (AR) caused about 1.27 million deaths worldwide, with lower respiratory tract infections (particularly pneumonia) dominating the global disease burden caused by resistant microorganisms. OBJECTIVE. To determine the compliance of antibiotics (J01), which are recommended by the guidelines of the National Academy of Medical Sciences of Ukraine for the empiric therapy of community-acquired pneumonia (CAP) in adults, with World Health Organization (WHO) recommendations based on the prevention of the development of AR. MATERIALS AND METHODS. Objects – antibiotics (J01) recommended by the guideline and their belonging to the access, watch and reserve groups according to the WHO AWaRe classification of antibiotics. Methods: system overview, analytical, comparison and generalization. RESULTS AND DISCUSSION. In the guidelines for empiric therapy of CAP in adults, antibiotics of 7 groups are recommended, from which 36 international non-proprietary names (INNs) were selected and analyzed. Of these, 7 INNs belong to the access group, of which only 4 antibiotics (amoxicillin, amoxicillin / clavulanic acid, gentamicin, doxycycline) are recommended by WHO experts for empiric treatment of CAP in adults; 26 INNs belong to the watch group, but only 3 antibiotics (cefotaxime, ceftriaxone, clarithromycin) according to the WHO database are recommended as empiric therapy for the severe CAP in adults. Ceftaroline, according to the WHO AWaRe antibiotic classification, belongs to the reserve group and should be used to fight multiresistant microorganisms. No antibiotic of the reserve group is recommended by WHO for empiric therapy of CAP. CONCLUSIONS. The results of the analysis can be used in updating the recommendations for rational empiric antibiotic therapy of CAP, taking into account the mechanisms of resistance to the development and spread of AR.