Phytochemical Analysis最新文献

Background: Pine forests are among the most extensive forest ecosystems in the world, and pine trees produce a variety of by-products, including needles, bark, seeds, and resin, which are rich in natural antioxidants and other bioactive compounds with significant potential in the nutraceutical, pharmaceutical, and cosmetic sectors. Historically, they have been undervalued and often treated as waste biomass.

Objective: This review consolidates current knowledge on the antioxidant composition of pine by-products, with a focus on their innovative applications in developing new pharmaceuticals, nutraceuticals, and cosmetic products.

Results: The chemical composition of these by-products, such as polyphenol compounds, varies based on species, geographic and environmental conditions, and extraction techniques. Emphasis is placed on green and sustainable extraction processes that preserve antioxidant potency while minimizing environmental impact. Both in vivo and in vitro studies have demonstrated a range of beneficial effects, including anti-inflammatory, anticancer, antidiabetic, and protective activities against oxidative stress-related diseases. By harnessing the antioxidant potential of pine-derived biomaterials, we can reduce waste, promote circular bioeconomy strategies, and develop innovative health-promoting products.

Conclusions: However, further research and technological advancements are needed to bring these applications to an industrial scale, serving sustainable development goals.

Introduction: Lichexanthones are the major xanthones found in lichens. They present a high degree of isomerism, which makes their identification tedious. Xanthones are known to occur in lichens according to chemosyndromes, and these compounds act as chemotaxonomic markers. Many lichens that produce xanthones are crustose lichens from Lecanora or Pertusaria genera, which often leads to small amounts of extracts being analyzed.

Objective: We aimed to set up a method able to identify the right isomers of lichexanthones contained in the extract of a xanthone-producing lichen. This method has to produce reliable results even without all the possible isomers at hand, as they are numerous and difficult to obtain.

Material and methods: The 16 norlichexanthones were obtained by a strategy combining isolation and synthesis. All of them were characterized by a full set of NMR experiments, highlighting key features, and an HPLC/DAD/MS method was developed. To exemplify the method, selected lichens were submitted to acetone microextraction and the extracts were analyzed by HPLC/DAD/MS and NMR.

Results: All norlichexanthones were well separated by HPLC/DAD/MS, which enables their identification in the lichen extracts, provided that the retention time of all the isomers is known; ¹³C NMR is very informative about the position of chlorine in norlichexanthones but lacks sensitivity. 2D NMR provides a high level of structural information even on complex extracts.

Conclusion: In addition to HPLC/DAD/MS, NMR can be used directly on a lichen extract to confirm the positions of the chlorine atoms on the lichexanthone scaffold, thanks to the HSQC experiment. Furthermore, the NOESY experiment gives the position of methylations for a comprehensive overview of the substitution patterns involved in the extract of a xanthone-producing lichen, without requiring the entire series of the 64 derivatives.

Introduction: The Olive (Olea europaea L.) is one of the most popular edible oil-producing fruits, consumed worldwide for its myriad nutritional and health benefits. Olive oil production generates huge quantities of by-products from the fruit, which are considered environmental hazards. Recently, more and more efforts have been made to valorize olive by-products as a source of low-cost, value-added food applications.

Objective: The main objective of this study was to globally assess the metabolome of olive fruit by-products, including olive mill wastewater, olive pomace, and olive seeds from fruits from two areas, Siwa and Anshas, Egypt.

Methods: Gas chromatography-mass spectrometry (GC-MS) and ultra-high-performance liquid chromatography with mass spectrometry (UPLC-MS) were used for profiling primary and secondary metabolites in olive by-products. Also, multivariate data analyses were used to assess variations between olive by-product samples.

Results: A total of 103 primary metabolites and 105 secondary metabolites were identified by GC-MS and UPLC-MS, respectively. Fatty acids amounted to a major class in the olive by-products at 53-91%, with oleic acid dominating, especially in the pomace of Siwa. Mill wastewater was discriminated from other by-products by the presence of phenolics mainly tyrosol, hydroxyl tyrosol, and α-tocopherol as analyzed by UPLC-MS indicating their potential antioxidant activity. Pomace and seeds were rich in fatty acids/esters and hydroxy fatty acids and not readily distinguishable from each other.

Conclusion: The current work discusses the metabolome profile of olive waste products for valorization purposes. Pomace and seeds were enriched in fatty acids/esters, though not readily distinguishable from each other.

Introduction: Lipid molecules are present in tumours and play an important role in the anti-inflammatory response as well as in antiviral protection. Changes in the type and location of lipids in the intestine following exposure to environmental stressors play an important role in several disorders, including ulcerative colitis (UC), inflammatory bowel disease (IBD), and colorectal cancer.

Objectives: The aim of this work is to provide a new theoretical basis for tumour initiation and development by accurately measuring the spatial distribution of lipids and metabolites in intestinal tissue. Spatial metabolomics allows the detection of samples with minimal sample volume by label-free imaging of complex samples in their original state. The distribution of lipid molecules in tumours has not been reported, although the distribution of lipid molecules in intestinal tissue has been reported in the literature.

Methods: The range of lipid profiles in colon cancer mouse tumour tissue was compiled using a spatial metabolomics: lipid extraction method. The changes in lipid distribution in two regions after oral administration of American Ginseng (Panax quinquefolius L.) vesicles were also compared. Tumour tissue samples were extracted with 80% methanol-20% formic acid in water.

Results: The resulting spatial metabolic profile allowed the identification of seven lipid classes in mouse tumours. The distribution of fibre tissue cells was 23.2% higher than tumour tissue cells, with the exception of the fatty acid (FA) species.

Introduction: Herbal supplements and OTC herbal drugs enjoy wide popularity with consumers but their quality has been questioned by genomic methods of testing. Due to complex regulatory environments in Europe and North America, the quality assurance of herbal preparations depends on protocols, which can significantly differ between the respective national and supranational drug control agencies. Modern methods of analysis combine genetic testing (DNA barcoding) with advanced chromatographic techniques as well as traditional microscopic and macroscopic tests to detect adulterants and undesirable constituents of herbs, including alkylphenols, aristolochic acids, and pyrrolizidine alkaloids.

Objective: This review will give an account of current trends in herbal drug analysis and explain the shortcomings of existing methodologies. The article will also discuss regulatory protocols, compendial methods and differentiate between dietary supplement testing regimens and the requirements for approved herbal drugs. The purpose of this review is to document current trends in genetic testing and reveal future developments in drug analysis to reduce the possibility of adulterations and assure the authenticity of herbal products.

Results: Chemometric methods and orthogonal approaches aid in the deconvolution of chromatographic and spectral data while expanding databases for nucleotide sequences and mineable spectra support method development in herbal analysis.

Conclusion: Genetic testing of herbal products has further increased the capabilities to detect minute adulterations, but such assays are only meaningful in combination with chromatographic and spectroscopic analysis. Despite the advancement of genomic testing, chemometrics, UHPLC and mass spectrometry, cost-effective quality control techniques such as HPTLC in conjunction with microscopic and macroscopic examination remain important particularly in regulated environments.

Introduction: Panacis Quinquefolii Radix, a valued herb in traditional Chinese medicine, is frequently prescribed for its immunomodulatory effects and its potential to improve cardiovascular function. Recently, there is an increasing amount of research on ginseng polysaccharides, due to their variety of pharmacological activities, including anti-inflammatory, hepatoprotective, cardiovascular protective, and the improvement of intestinal function.

Objective: This study investigates the efficacy of Panacis Quinquefolii Radix polysaccharides in alleviating cardiovascular diseases and to achieve the high-value utilization of ginseng by-products.

Methodology: A pectic polysaccharide named XYSJY2-2 was extracted with hot water from stems and leaves of Panacis Quinquefolii Radix and further isolated by a DEAE Sepharose Fast Flow column and a Sephacry S-100 column. The structural characteristics of XYSJY2-2 was determined by monosaccharide composition, IR, NMR, and methylation analysis. The cardioprotective activity of this polysaccharide was evaluated in vitro and in vivo. With a relative molecular weight of 5.1 kDa, XYSJY2-2 is a type I rhamnogalacturonan featuring a core backbone made up of alternately linked rhamnose and galacturonic acid.

Results: XYSJY2-2 effectively alleviated myocardial hypertrophy and remodeling induced by Ang II and TAC in vivo and in vitro, partly due to suppressing Nppa and Nppb expression.

Conclusion: A pectic polysaccharide from stems and leaves of Panacis Quinquefolii Radix has the potential to alleviate cardiovascular disease.

Introduction: Magnoliae officinalis cortex (MOC) has been used for thousands of years as a traditional Chinese herb. In Chinese Pharmacopoeia (2020 edition), it has two types of decoction pieces, raw Magnoliae officinalis cortex (RMOC) and ginger juice processed Magnoliae officinalis cortex (GMOC). The quality difference between RMOC and GMOC has not been explored systemically.

Objective: This study aimed to discover the quality difference between RMOC and GMOC, and clarify the effect of ginger juice during processing comprehensively.

Methods: Ultra-performance liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry (UPLC-Q-TOF-MS/MS) and gas chromatography-mass spectrometry (GC-MS) were applied to study the non-volatile and volatile components of RMOC and GMOC; electronic eye was applied for color measurement. Meanwhile, water processed Magnoliae officinalis cortex (WMOC) was studied as the blank sample.

Results: There were 155 non-volatile and 72 volatile substances identified. Between RMOC and GMOC, 29 distinctive non-volatile and 34 distinctive volatile compounds were detected, among which 23 new compounds appeared and five compounds disappeared due to the addition of ginger juice during processing. The intensities of 12 common non-volatile compounds and the relative percentage contents of four common volatile compounds showed significant differences between RMOC and GMOC. In color measurement of RMOC, GMOC, and WMOC, 14 common compounds with significant differences were discovered related to their color values, and their mathematical prediction functions were built.

Conclusion: There were significant differences between RMOC and GMOC; the processing mechanism of GMOC would be carried out based on the differential compounds in further investigation.

Kalanchoe species products are commercially available in local markets and by internationally accessible online retailers and may exhibit quality issues because of misidentification from similar common names and anatomical similarities among related species used as feedstock. This study proposes an approach using UPLC-MS/MS^E and HPTLC, coupled with morphoanatomical analysis to establish chemical composition pattern data for five Kalanchoe species. Subsequently, the methods were validated by analyzing commercial products purported to contain 100% Kalanchoe extract. UPLC-MS/MS^E and HPTLC profiles demonstrated that quercetin and kaempferol derivatives were identified as the primary flavonoids in genuine plant extracts. Chemometric analysis showed clear differences in chemical profiles and no similarities between the Kalanchoe plant extracts and commercial products. Different patterns of anticlinal epidermal cell walls and midrib of the leaves and shape and arrangement of the vascular bundles in the petiole were the primary micro-morphological differences observed. Evaluation of commercial samples revealed that products labeled as containing Kalanchoe did not match the pharmacobotanical analysis nor the chemical composition of the species. These methods can be considered important tools for quality control in commercial products derived from Kalanchoe species.

Introduction: Berberis fortunei Lindl. (BF) is a medicinal plant widely utilized in East Asia. However, the chemical components present in its roots, stems, and leaves have not been systematically analyzed and compared. The specific active ingredients that inhibit HT29 colorectal cancer cells are still unclear.

Objective: The aim of this study is to comprehensively analyze the chemical compositions of BF's roots, stems, and leaves and to evaluate their biological function against HT29 cells.

Methodology: GC-IMS and LC-QTOF-MS were employed to analyze the volatile and nonvolatile components of BF, respectively. The MTT assay was used to evaluate the inhibitory effects of extracts and compounds from BF on HT29 cells. A network analysis based on molecular docking was conducted to identify the potential targets of compounds.

Results: A total of 77 volatile components and 116 nonvolatile components were identified in the roots, stems, and leaves of BF. The inhibitory activity of different parts of BF against HT29 cells followed the order: roots > stems > leaves. Protoberberine-type alkaloids showed more pronounced effects at 24 h, whereas bisbenzylisoquinoline-type alkaloids demonstrated stronger activity at 48 h. Network analysis based on molecular docking revealed significant differences in the pathways targeted by the two types of alkaloids.

Conclusion: This study not only comprehensively analyzed the compositions of BF but also examined its biological function in inhibiting HT29 cells, laying a theoretical foundation for its further development and application. The findings provide diverse lead compounds for the subsequent development of drugs against colorectal cancer.

Ever since the chemical structures of major phytocannabinoids, such as Δ⁹-tetrahydrocannabinol (THC) and cannabidiol (CBD), were elucidated, the majority of research has focused primarily on these compounds, often overlooking the other ~160 minor cannabinoids identified in Cannabis sativa to date. However, in recent years, these previously understudied cannabinoids have garnered increasing scientific attention due to advancements in highly sensitive analytical techniques that enable their detection in plant matrices. Moreover, early-stage clinical trials have demonstrated that several minor cannabinoids exhibit promising therapeutic potential. This review aims to provide a comprehensive summary of recent developments in the extraction, analysis, and potential applications of selected minor phyt cannabinoids, with the goal of facilitating future research in this field. A thorough analysis of the latest data has been conducted to offer a detailed overview of current extraction and quantification methodologies for minor cannabinoids.