Search Results (180)

Blackcurrant is a notable superfruit in Europe, and its vitamin C content surpasses the well-known blueberry superfruit. However, due to its short shelf life during storage, consumption is mainly accounted by frozen berries, extracts, and concentrates. This study applied an intensity of 1.2 W/m² UVC with different durations, including control (non-treated), UVC irradiation for 0.5 h (0.5 h treatment), UVC irradiation for 1 h (1 h treatment), and UVC pretreatment for 2 h (2 h treatment) to blackcurrant berries before storage. Fundamental physical (firmness and weight loss) and physicochemical characteristics (SSC, pH, and acids), microbial population changes, total phenolic content, antioxidant capacity, and specific phenolic compound changes were evaluated every five days over a twenty-day storage period. The results indicated that the longer the UVC pretreatment, the lower the water weight losses during storage. Meanwhile, the UVC pretreatment significantly affected the blackcurrant soluble solid content, resulting in higher soluble solid contents detected in the blackcurrants with the higher doses of UVC. For the mold population control, UVC effects were highly correlated with the pretreatment duration. However, UVC did not have a significant influence on the berry pH and acid contents, but the storage length slightly increased the pH and decreased the acids. At the same time, UVC pretreatment did not affect the berry firmness, polyphenols, ascorbic acid content, or antioxidant capacities, which were primarily influenced by the storage duration. The monophenolic compounds detected before and after storage indicated that more than one hour of UVC radiation influenced most of the phenolic contents largely before storage. The UVC pretreatment has also influenced some phenolic compounds. After storage, half an hour of UVC pretreatment increased cyanidin levels, and two hours of UVC pretreatment increased catechin and epicatechin levels. However, most of the compounds remained at similar amounts during storage in each treatment. Further research is needed to improve the UVC radiation time length or intensity or explore other technology combinations to optimize UVC pretreatments for blackcurrant storage. Full article

Targeted radionuclide therapy (TRT) utilizes radiopharmaceuticals to deliver radiation directly to cancer cells while sparing healthy tissues. Beyond the absorbed dose of ablative radiation, TRT induces non-targeted effects (NTEs) that significantly enhance its therapeutic efficacy. These effects include radiation-induced bystander effects (RIBEs), abscopal effects (AEs), radiation-induced genomic instability (RIGI), and adaptive responses, which collectively influence the behavior of cancer cells and the tumor microenvironment (TME). TRT also modulates immune responses, promoting immune-mediated cell death and enhancing the efficacy of combination therapies, such as the use of immune checkpoint inhibitors. The molecular mechanisms underlying TRT involve DNA damage, oxidative stress, and apoptosis, with repair pathways like homologous recombination (HR) and non-homologous end joining (NHEJ) playing critical roles. However, challenges such as tumor heterogeneity, hypoxia, and radioresistance limit the effectiveness of this approach. Advances in theranostics, which integrate diagnostic imaging with TRT, have enabled personalized treatment approaches, while artificial intelligence and improved dosimetry offer potential for treatment optimization. Despite the significant survival benefits of TRT in prostate cancer and neuroendocrine tumors, 30–40% of patients remain unresponsive, which highlights the need for further research into molecular pathways, long-term effects, and combined therapies. This review outlines the dual mechanisms of TRT, direct toxicity and NTEs, and discusses strategies to enhance its efficacy and expand its use in oncology. Full article

Ribes is the only genus in the Grossulariaceae family and holds considerable economic importance. Northeast Asia represents one of the major global centers of Ribes distribution. This study presents the first comprehensive investigation focused on this region, examining the diversity, distribution patterns, and environmental determinants of wild Ribes species through field surveys and a review of the relevant literature. Results indicate the presence of 36 species (including 8 varieties) from 7 subgenera of wild Ribes across Northeast Asia, predominantly belonging to the subgenera Berisia, Ribes, and Grossularia. The species are unevenly distributed throughout the region: (1) The Russian Far East exhibits the highest species richness, with 21 species from 5 subgenera, followed by Northeast China (16 species, 6 subgenera), Japan (12 species, 7 subgenera), Mongolia (10 species, 3 subgenera), South Korea (9 species, 5 subgenera), and North Korea (8 species, 5 subgenera). These findings suggest that the Russian Far East currently serves as the core distribution center for Ribes in Northeast Asia. (2) The species diversity of wild Ribes exhibits a unimodal latitudinal pattern, peaking between 47° N and 52° N. (3) A similar unimodal trend is evident along altitudinal gradients, with most species occurring between 500 m and 1500 m. (4) Species richness is primarily influenced by temperature stability and extreme low temperatures, followed by precipitation seasonality and elevation, while annual precipitation shows a relatively minor effect. This study offers crucial baseline data for the conservation and sustainable utilization of Ribes in Northeast Asia. Full article

Blackcurrant (Ribes nigrum) is valued for its health-promoting compounds, many of which remain in the pomace after juice extraction. Berry pomace can be considered a valuable source of dietary fiber. However, it is typically dominated by insoluble dietary fiber (IDF), and the soluble-to-insoluble fiber ratio is often nutritionally suboptimal. The aim of this study was to evaluate the influence of enzymatic hydrolysis on the composition and technological properties of blackcurrant pomace (BCP). Three commercial enzyme preparations—Viscozyme^® L, Celluclast^® 1.5 L, and Pectinex^® Ultra Tropical (Novozymes A/S, Denmark)—were used for enzymatic hydrolysis, which was conducted at 50 °C for 1 h. The enzymatic treatments altered BCP’s chemical composition and technological properties. Pectinex^® Ultra Tropical and Viscozyme^® L primarily hydrolyzed SDF, while Celluclast^® 1.5 L was more effective on IDF, resulting in increased SDF content and an improved SDF/IDF ratio. Enzymatic hydrolysis reduced the oil retention capacity and impaired stabilizing properties, but it increased both the water retention capacity and the solubility index. It was found that the creaming index of the pomace deteriorated with decreased IDF content. The findings indicate that the effects of enzymatic modification on BCP’s composition and technological properties can vary significantly, supporting its potential application in the development of novel food products. Full article

Blackcurrants (Ribes nigrum L.) are recognized for their rich anthocyanin content, contributing to their health-promoting properties. This study explored the phytochemical profiles and antioxidant activities of five blackcurrant varieties (Gofert, Tiben, Ceres, Ronix, and Ruben) cultivated in Mureș County, Romania. Using HPLC-DAD analysis, cyanidin-rutinoside was identified as the predominant anthocyanin in all varieties. Ruben stood out with the highest anthocyanin concentration and antioxidant activity, highlighting its potential for functional food and nutraceutical applications. The high anthocyanin content determined in these varieties suggests the influence of hybridization and unique regional growing conditions. Antioxidant activity, assessed through 2,2-Diphenyl-1-picrylhydrazyl (DPPH) and (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)) (ABTS) assays, showed strong correlations with anthocyanin content, though polyphenolic levels did not consistently align with antioxidant efficacy. These findings emphasize the importance of tailoring blackcurrant cultivation to optimize bioactive compound production and support further exploration of their therapeutic potential. Full article

Currants are highly valued nutritionally and are traditionally grown in the Czech Republic. This study investigated 15 cultivars of red, white, and black currants to better understand their positive sensory properties and their relationship to consumer preference. Red and white cultivars, in particular, have received little attention from this perspective. Sensory quality, primarily flavor, was evaluated in conjunction with volatile compound profiling to identify the sensorially superior cultivars. The results confirmed clear differences between black currants and red/white variants. Red and white currants, belonging to the same species (Ribes rubrum), exhibited similar volatile compound content and composition, as well as similar sensory characteristics, distinguishing them significantly from black currants (Ribes nigrum). The flavor of black currants, characterized by strong astringency and distinct blackcurrant notes, was generally perceived less favorably by the evaluators. A total of 54 volatile compounds were identified across the analyzed cultivars. Alcohols (contributing flowery and fruity aromas), aldehydes (grassy aromas), and esters (fruity aromas) were the most abundant in most cultivars. Using the odor activity value (OAV) concept, 15 of these compounds were identified as likely contributors to currant flavor (OAV ≥ 1). Principal component analysis (PCA) identified the top cultivars within each variant: ‘Victoria’ (white), ‘Rubigo’ (red), and ‘Demon’ (black). These are proposed for potential practical applications. Full article

Obesity is a metabolic condition of epidemic scale. Previously, we showed that antioxidant extracts from Ribes nigrum had antioxidant and anti-adipogenic effects in mature adipocytes (AD). Here, we evaluated an aqueous extract from Peumus boldus (Boldo) in AD and studied its effect on reactive oxygen species (ROS) and lipid production. We analyzed the antioxidant activity (AA) of the Boldo extract using the DPPH technique and polyphenol (Pph) content via Folin’s reagent. In AD, we evaluated ROS production, catalase (CAT) activity, intracellular triglyceride (Tg) and cholesterol (Chol) contents, nitric oxide (NO) production via Griess reagent, and the levels of glycerol (Gly) and TNF-α released in the culture medium. We showed that the Boldo extract has high AA. In vitro, Boldo treatment decreased ROS intracellular production and CAT activity. In addition, the Boldo extract was effective in reducing Tg and Chol levels and NO production. We did not identify significant differences in Gly released or TNF-α secreted. We suggest that the Boldo extract has antioxidant and anti-adipogenic effects, but we did not observe lipolytic effects. Boldo did not modify inflammatory markers. Full article

The increased production of high-quality berry products in recent years has led to considerable quantities of by-products such as pomace (25–50%), which consists of skin, seeds, stems and leaves. The improper management of pomace can lead to environmental pollution and potential public health problems due to microbial contamination, and storage causes additional processing costs. However, due to their high content of various valuable bioactive compounds (BACs), berry by-products have gained much attention as sustainable and functional ingredients with applications in the food and nutraceutical industries. The health benefits are primarily attributed to the phenolic compounds, which exhibit numerous biological activities, especially good antioxidant and antibacterial activity as well as health-promoting effects. This review summarizes the bioactive content and composition of extracts from berry by-products (genera Ribes, Rubus, Fragaria, Sambucus, Aronia and Vaccinium) obtained using advanced extraction technologies and their stabilization through sophisticated encapsulation technologies that make them suitable for various food applications. The addition of berry pomace to beverages, bakery, dairy and meat products improves sensory quality, extends shelf life, increases nutritional value and reduces the environmental footprint. This information can provide food scientists with valuable insights to evaluate the potential of berry by-products as functional ingredients with health-promoting and disease-preventing properties that create value-added products for human consumption while reducing food waste. Full article

Background/Objectives: Our studies have provided evidence for the alteration of exercise-induced metabolic responses by the intake of anthocyanin-rich New Zealand blackcurrant (NZBC) extract. In this secondary analysis of 10 studies, we examined the relationship between the pre-intervention exercise-induced respiratory exchange ratio and the blackcurrant-induced respiratory exchange ratio and substrate utilisation during exercise. Methods: Metabolic data of seven cohort and three case studies with females (n = 46) and males (n = 71), from recreationally active to ultra-endurance trained individuals that were dosed with different intake durations (acute to two-week intake) and dosages (105 to 420 mg of anthocyanins) of NZBC extract for walking-, running-, and cycling-induced effects, were included in the secondary analysis. Results: There was a strong positive correlation between the pre-intervention and blackcurrant-induced respiratory exchange ratio for females (Pearson r: 0.7972, p < 0.0001) and males (Pearson r: 0.8674, p < 0.0001). A moderate positive correlation was obtained for the relationship between the pre-intervention respiratory exchange ratio and changes in fat oxidation for females (Pearson r: 0.5311, p = 0.0001) and males (Pearson r: 0.3136, p = 0.002). In addition, a moderate negative correlation was obtained for the relationship between the pre-intervention respiratory exchange ratio and changes in carbohydrate oxidation for females (Pearson r: −0.3017, p = 0.0393) and males (Pearson r: −0.3327, p < 0.001). There were no differences between females and males in the changes of the exercise-induced metabolic responses to the intake of New Zealand blackcurrant extract. Conclusions: Our secondary analysis of the data in studies on the effects of New Zealand blackcurrant extract suggests that the metabolic response of individuals to the intake of New Zealand blackcurrant extract depends partly on the pre-intervention respiratory exchange ratio, with the majority of individuals showing enhanced exercise-induced fat oxidation and lower exercise-induced carbohydrate oxidation. However, a divergent metabolic response seems possible such that individuals with a very low intrinsic respiratory exchange ratio may more likely experience lower fat oxidation and higher carbohydrate oxidation with the intake of New Zealand blackcurrant. Individuals with a high intrinsic respiratory exchange will more likely experience higher fat oxidation and lower carbohydrate oxidation with the intake of New Zealand blackcurrant. Future work is required to examine the factors and mechanisms for the individual variation of the response of exercise-induced substrate utilisation relative to the intake of anthocyanin-rich New Zealand blackcurrant extracts. Full article

Blackcurrant (Ribes nigrum L.) has high nutritional value for human health due to its abundant vitamin C, flavonoids, and organic acids. However, its breeding and genetic research have been severely hindered by the lack of scientific tools such as molecular markers. Here, we identified 14,258 EST-SSR loci from 9531 CDS sequences with lengths greater than 1 kb, which comprised 6211 mononucleotide repeats, 4277 dinucleotide repeats, and 2469 trinucleotide repeats. We then randomly selected 228 EST-SSR loci for PCR amplification and gel electrophoresis imaging in the Ribes collection of Northeast Agricultural University (95 blackcurrant cultivars and 12 other Ribes accessions). As a result, 31 pairs of markers produced clear and reproducible bands of the expected size. Based on the 107 Ribes accessions, the allele number (Na), information index (I), observed heterozygosity (Ho), expected heterozygosity (He), and polymorphic information content (PIC) of the 31 markers were 2–5, 0.23–1.32, 0.07–0.71, 0.11–0.68, and 0.14–0.67, respectively. For the blackcurrant gene pool, neighbor-joining and population structure analysis revealed three clusters, which did not align well with their geographical origins. Based on the results, two sets with 21 and 19 blackcurrant cultivars were identified by Power Core (PC) and Core Hunter (CH) programs. The integrated core germplasm (IC) set with 27 cultivars derived from the PC and CH sets harbored abundant genetic diversity, where the allele retention rate accounted for 98.9% of the blackcurrant gene pool. The SSR markers, data, and core germplasms presented in this study lay a solid foundation for the phylogenetic study, molecular breeding, and conservation genetics of Ribes, especially Ribes nigrum. Full article

This study focuses on refining in vitro propagation protocols for red currant cultivars of the Ribes genus and evaluating the role of LED lighting in the adaptation of microplants. The cultivars ‘Red Lake’, ‘Englische Grosse Weisse’, ‘Marmeladnitsa’, and ‘Podarok Leta’ were successfully introduced into in vitro culture during their dormancy phase using 0.1% HgCl₂ as a sterilizing agent. The period of spring introduction is not very efficient in connection with the intensive development of saprophytic microflora and weak morphogenesis microplants. Using 0.01% C₉H₉HgNaO₂S sterilizer resulted in a decrease in the necrosis percentage, but an increase in mold proportion. The preparation of the plants with 12% H₂O₂ was considered environmentally not effective enough to obtain a large number of healthy microplants. The use of 12% H₂O₂ resulted in increased necrosis rates by 24.76% compared to 0.01% C₉H₉HgNaO₂S and 0.1% HgCl₂ sterilizers. The variety specificity of Ribesia plants in terms of the content of MS and LF nutrient media components was determined by the survival rate of explants, the formation of additional micro-shoots, and the morphological development. The MS medium with the addition of 1 mg∙L⁻¹ BAP decreased the percentage of mold and necrosis infection and provided a high percentage of viable plants with optimal growth and reproduction rate. In contrast, the LF medium with the same concentration of 6-BAP resulted in poor explant quality and leaf chlorosis at later stages. The study also investigated the effects of different LED light spectra on morphological and physiological traits. For ‘Red Lake’ and ‘Englische Grosse Weisse’, RWUV-A (625–740 nm) lighting enhanced biomass and chlorophyll (Chl a and Chl a + b) accumulation, while the White (W) spectrum benefited ‘Podarok Leta’. Conversely, the RW spectrum with minimal green and no ultraviolet light restricted growth and photosynthetic pigment accumulation across all cultivars, promoting compact plant structures. The RWUV-A lighting condition resulted in the highest NDVI values across all cultivars, indicating an improved physiological status and biomass accumulation. These findings underscore the importance of refining the microclonal reproduction protocols for Ribesia subgenus representatives, emphasizing the genotype-specific light modulation during the proliferation stage. The study highlights the utility of the MS medium and tailored light conditions in enhancing the effectiveness of propagation techniques for producing high-quality planting material. Full article

Red currant (Ribes rubrum L.) berries are rich in bioactive compounds and exhibit nutritive and protective features. This research examined the content of secondary metabolites of the red currant variety Redpoll lyophilized juice and waste extract and their antioxidative and spasmolytic effects. The flavonol and anthocyanin contents of the samples were determined using high-performance liquid chromatography. The antispasmodic effects were assessed in in vitro conditions, and the potential impact of the samples and possible action mechanisms were revealed. The results showed the prevalence of cyanidin-3-O-glucoside as the dominant anthocyanin with higher content in the juice sample. Quercetin content, as the prevalent flavonol, was higher in the waste sample. The berry juice showed a greater ability for scavenging free radicals, whereas the waste better inhibited lipid peroxidation. The juice was a superior antispasmodic agent for spontaneous, KCl-, CaCl₂-, BaCl₂-, histamine-, and acetylcholine-induced ileal contractions. This first evaluation of the red currant variety Redpoll lyophilized juice and waste extract indicated the beneficial effects of juice as an antioxidant and spasmolytic agent. Therefore, this red currant juice sample could be designated for the prevention or treatment of gastrointestinal disorders. Full article

Phenolic compounds have antiglycation activity, but the changes occurring during thermal treatment (TT) in these activities are not completely understood. The effects of the extraction conditions of (poly)phenols from Ribes magellanicum fruits, before and after TT, on their antioxidant and antiglycation effects were assessed. (Poly)phenol-enriched extracts (PEEs) from raw and TT (90 °C, 1 h) Ribes magellanicum were extracted using three solvent mixtures (ethanol/water/acetic acid) with increasing water content (0, 24, and 49%) and three solvent-to-solid ratios (5, 10, and 20 mL/g). PEEs of raw samples showed increased values of total (poly)phenols (TPC), TEAC, and FRAP and decreased IC₅₀ values of fluorescent advanced glycation end products (AGEs) with increasing water content. An increase in TPC and FRAP values was observed for TT samples, but an increase in the IC₅₀ values of fluorescent AGEs for PEEs with increasing water content was observed. Antiglycation activity (IC₅₀ raw/IC₅₀ TT) depended on the solvent-to-solid ratio and the extracting solvent. HPLC-DAD-MS analysis of raw and TT samples showed degradation of anthocyanins, flavonoid fragmentation, and oxidation as the main changes in the phenolic composition of TT samples. We show that TT affects the (poly)phenolic composition of R. magellanicum, producing a decrease in the antiglycation activity when extractions are performed with increasing water content, despite increasing TPC and FRAP activity. Full article

The nomenclatural and taxonomic issues regarding the thread-legged bug genera Pleias Kirkaldy, 1901 and Bagauda Bergroth, 1903 are reviewed, and Pleias is concluded to be the valid name of the genus. A comprehensive review of Pleias is conducted, resulting in 18 new combinations and two new synonymies [P. aelleni (Villiers, 1970) comb. n., P. atypica (Ghate, Boyane & Joshi, 2019) comb. n., P. avida (Bergroth, 1903) comb. n., P. brunnea (McAtee & Malloch, 1926) comb. n., P. cavernicola (Paiva, 1919) comb. n., P. creppei (Lhoste, 1939) comb. n. = Bagauda gilletti Miller, 1956 syn. n., P. ernstmayri (Kulkarni & Ghate, 2016) comb. n., P. furcosa (Ribes, 1987) comb. n., P. gigantea (Lhoste, 1939) comb. n., P. lucifuga (McAtee & Malloch, 1926) comb. n., P. monodi (Villiers, 1972) comb. n., P. similis (Wygodzinsky, 1966) comb. n., P. smithersi (Wygodzinsky, 1966) comb. n., P. splendens (Distant, 1906) comb. n., P. strinatii (Villiers, 1970) comb. n., P. tenebricola (Horváth, 1910) comb. n., P. wagneri (Villiers, 1949) comb. n. = B. eriksoni Miller, 1954 syn. n., and P. zetteli (Rédei, 2005) comb. n.]. The bibliographies, diagnosis, and known distribution records are presented for all described species, and three new species [P. fashengisp. n. (from Yunnan, China), P. serratasp. n. (from Sabah, Malaysia), and P. trimaculatasp. n. (from Sulawesi, Indonesia)] are described. The identification keys to the African and Asian species of Pleias are provided. The systematic relationships, distribution, and ecology of the genus are discussed. Full article

Classical radiation biology as we understand it clearly identifies genomic DNA as the primary target of ionizing radiation. The evidence appears rock-solid: ionizing radiation typically induces DSBs with a yield of ~30 per cell per Gy, and unrepaired DSBs are a very cytotoxic lesion. We know very well the kinetics of induction and repair of different types of DNA damage in different organisms and cell lines. And yet, higher organisms differ in their radiation sensitivity—humans can be unpredictably radiosensitive during radiotherapy; this can be due to genetic defects (e.g., ataxia telangiectasia (AT), Fanconi anemia, Nijmegen breakage syndrome (NBS), and the xeroderma pigmentosum spectrum, among others) but most often is unexplained. Among other mammals, goats (Capra hircus) appear to be very radiosensitive (LD₅₀ = 2.4 Gy), while Mongolian gerbils (Meriones unguiculatus) are radioresistant and withstand quadruple that dose (LD₅₀ = 10 Gy). Primary radiation lethality in mammals is due most often to hematopoietic insufficiency, which is, in the words of Dr. Theodor Fliedner, one of the pioneers of radiation hematology, “a disturbance in cellular kinetics”. And yet, what makes one cell type, or one particular organism, more sensitive to ionizing radiation? The origins of radiosensitivity go above and beyond the empirical evidence and models of DNA damage and repair—as scientists, we must consider other phenomena: the radiation-induced bystander effect (RIBE), abscopal effects, and, of course, genomic instability and immunomodulation. It seems that radiosensitivity is not entirely determined by the mathematics of DNA damage and repair, and it is conceivable that radiation biology may benefit from an informed enquiry into physiology and organism-level signaling affecting radiation responses. The current article is a review of several key aspects of radiosensitivity beyond DNA damage induction and repair; it presents evidence supporting new potential venues of research for radiation biologists. Full article