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Sensors (Basel, Switzerland) May 2024With the steady increase in allergy prevalence worldwide, there is a strong need for novel diagnostic tools for precise, fast, and less invasive testing methods. Herein,...
With the steady increase in allergy prevalence worldwide, there is a strong need for novel diagnostic tools for precise, fast, and less invasive testing methods. Herein, a miniatured fluorescence-based biosensing system is developed for the rapid and quantitative detection of allergen-specific immunoglobulin-E. An antibody-based fluorescence assay in a microfluidic-patterned slide, combined with a custom-made portable fluorescence reader for image acquisition and user-friendly software for the data analysis, enables obtaining results for multiple allergens in just ~1 h with only 80 μL of blood serum. The multiplexed detection of common birch, timothy grass, cat epithelia, house dust mite, and dog epithelia shows quantitative IgE-mediated allergic responses to specific allergens in control serum samples with known total IgE concentration. The responses are verified with different control tests and measurements with a commercial fluorescence reader. These results open the door to point-of-care allergy screening for early diagnosis and broader access and for large-scale research in allergies.
Topics: Biosensing Techniques; Allergens; Point-of-Care Systems; Immunoglobulin E; Animals; Humans; Hypersensitivity; Fluorescence; Dogs; Cats
PubMed: 38894075
DOI: 10.3390/s24113280 -
International Journal of Molecular... Jun 2024Obese patients with asthma present with aggravated symptoms that are also harder to treat. Here, we used a mouse model of allergic asthma sensitised and challenged to...
Obese patients with asthma present with aggravated symptoms that are also harder to treat. Here, we used a mouse model of allergic asthma sensitised and challenged to house dust mite (HDM) extracts to determine whether high-fat-diet consumption would exacerbate the key features of allergic airway inflammation. C57BL/6 mice were intranasally sensitised and challenged with HDM extracts over a duration of 3 weeks. The impact of high-fat-diet (HFD) vs. normal diet (ND) chow was studied on HDM-induced lung inflammation and inflammatory cell infiltration as well as cytokine production. HFD-fed mice had greater inflammatory cell infiltration around airways and blood vessels, and an overall more severe degree of inflammation than in the ND-fed mice (semiquantitative blinded evaluation). Quantitative assessment of HDM-associated Th2 responses (numbers of lung CD4 T cells, eosinophils, serum levels of allergen-specific IgE as well as the expression of Th2 cytokines ( and )) did not show significant changes between the HFD and ND groups. Interestingly, the HFD group exhibited a more pronounced neutrophilic infiltration within their lung tissues and an increase in non-Th2 cytokines (, , , ). These findings provide additional evidence that obesity triggered by a high-fat-diet regimen may exacerbate asthma by involving non-Th2 and neutrophilic pathways.
Topics: Animals; Asthma; Obesity; Disease Models, Animal; Mice; Diet, High-Fat; Th2 Cells; Mice, Inbred C57BL; Cytokines; Pyroglyphidae; Lung; Inflammation; Immunoglobulin E; Female; Allergens
PubMed: 38892358
DOI: 10.3390/ijms25116170 -
Animals : An Open Access Journal From... May 2024Two species of gastropods, and , were found infested with water mites of the genus in Bangkok and Nonthaburi provinces, Thailand. Morphological studies on these water...
The First Report of a Water Mite (Trombidiformes: Unionicolidae) Infection in spp. (Gastropoda: Viviparidae) from Thailand with a Description of a New Species of () sp. nov.
Two species of gastropods, and , were found infested with water mites of the genus in Bangkok and Nonthaburi provinces, Thailand. Morphological studies on these water mites, based on the characteristics of their genital acetabular and female genital fields, identified them as a new member of subgenus . () sp. nov. was named after the first location where this parasitic water mite was discovered. This species is distinguished from others by the pattern of their female genital field, with their anterior acetabular plates each bearing two acetabula and a short thick spine on the inner margin. Additionally, it differs from other species by the structure of the spines in its pedipalps and legs, as well as in the shapes of its coxal plates.
PubMed: 38891674
DOI: 10.3390/ani14111627 -
Scientific Reports Jun 2024Apis mellifera filamentous virus (AmFV) is a double-stranded DNA virus that infects Apis mellifera bees. To our knowledge, this is the first comprehensive study aiming...
Apis mellifera filamentous virus (AmFV) is a double-stranded DNA virus that infects Apis mellifera bees. To our knowledge, this is the first comprehensive study aiming to detect and analyse the genetic diversity and prevalence of AmFV in Korean honeybee colonies. Phylogenetic analysis based on baculovirus repeat open reading frame-N gene (Bro-N) sequences revealed that AmFV isolates from the Republic of Korea (ROK) fell into two distinct lineages, with genetic origins in Switzerland and China, with nucleotide similarities of 98.3% and 98.2%, respectively. Our prevalence analysis demonstrated a noteworthy infection rate of AmFV in 545 honeybee colonies, reaching 33.09% in 2022 and increasing to 44.90% by 2023. Intriguingly, we also detected AmFV in Varroa destructor mites, highlighting their potential role as vectors and carriers of AmFV. The presence of AmFV was correlated with an increased infection rate of sacbrood virus, deformed wing virus, Lake Sinai virus 2, black queen cell virus, and Nosema ceranae in honeybee colonies. These findings provide valuable insight into the prevalence and potential transmission mechanisms of AmFV in honeybee colonies in the ROK. The results of this study may be instrumental in the effective management of viral infections in honeybee apiaries.
Topics: Animals; Bees; Varroidae; Republic of Korea; Phylogeny; DNA Viruses; Prevalence; Genetic Variation
PubMed: 38890496
DOI: 10.1038/s41598-024-64882-z -
Journal of Investigational Allergology... Jun 2024Sensitization to Blomia tropicalis is associated with asthma in various tropical and subtropical countries; however, information about the specific molecular components...
BACKGROUND AND OBJECTIVE
Sensitization to Blomia tropicalis is associated with asthma in various tropical and subtropical countries; however, information about the specific molecular components associated with this disease is scarce. Using molecular diagnosis, we sought to identify B tropicalis allergens associated with asthma in Colombia.
METHODS
Specific IgE (sIgE) to 8 B tropicalis recombinant allergens (Blo t 2, 5, 7, 8, 10, 12, 13, and 21) was determined using an in-house ELISA system in asthma patients (n=272) and controls (n=298) recruited in a national prevalence study performed in several Colombian cities (Barranquilla, Bogotá, Medellín, Cali, and San Andrés). The study sample included children and adults (mean [SD] age, 28 [17] years). Cross-reactivity between Blo t 5 and Blo t 21 was evaluated using ELISA-inhibition.
RESULTS
Specific IgE (sIgE) to 8 B tropicalis recombinant allergens (Blo t 2, 5, 7, 8, 10, 12, 13, and 21) was determined using an in-house ELISA system in asthma patients (n=272) and controls (n=298) recruited in a national prevalence study performed in several Colombian cities (Barranquilla, Bogotá, Medellín, Cali, and San Andrés). The study sample included children and adults (mean [SD] age, 28 [17] years). Cross-reactivity between Blo t 5 and Blo t 21 was evaluated using ELISA-inhibition.
CONCLUSION
Although Blo t 5 and Blo t 21 are considered common sensitizers, this is the first report of their association with asthma. Both components should be included in molecular panels for diagnosis of allergy in the tropics.
Topics: Humans; Asthma; Immunoglobulin E; Adult; Male; Female; Case-Control Studies; Child; Adolescent; Colombia; Allergens; Young Adult; Middle Aged; Antigens, Plant; Cross Reactions; Tropical Climate; Prevalence; Child, Preschool
PubMed: 38888580
DOI: 10.18176/jiaci.0892 -
Scientific Reports Jun 2024Varroa mites, notorious for parasitizing honeybees, are generally classified as Varroidae. Their extremely modified morphologies and behaviors have led to debates...
Varroa mites, notorious for parasitizing honeybees, are generally classified as Varroidae. Their extremely modified morphologies and behaviors have led to debates regarding their phylogenetic position and classification as an independent family. In this study, two different datasets were employed to reconstruct the phylogenies of Varroa mites and related Laelapidae species: (1) 9257 bp from the whole 13 mitochondrial protein-coding genes of 24 taxa, (2) 3158 bp from 113 taxa using Sanger sequencing of four nuclear loci. Both mitochondrial and nuclear analyses consistently place Varroa mites within the Laelapidae. Here we propose to place Varroa mites in the subfamily Varroinae stat. nov., which represents a highly morphologically adapted group within the Laelapidae. Ancestral state reconstructions reveal that bee-associated lifestyles evolved independently at least three times within Laelapidae, with most phoretic traits originating from free-living ancestors. Our revised classification and evolutionary analyses will provide new insight into understanding the Varroa mites.
Topics: Animals; Phylogeny; Varroidae; Bees
PubMed: 38886408
DOI: 10.1038/s41598-024-63991-z -
The American Journal of Case Reports Jun 2024BACKGROUND Morbihan disease, also known as Morbihan syndrome, is a rare medical condition characterized by chronic facial edema predominantly affecting the upper...
BACKGROUND Morbihan disease, also known as Morbihan syndrome, is a rare medical condition characterized by chronic facial edema predominantly affecting the upper two-thirds of the face. Despite being recognized in medical literature for decades, its true prevalence and underlying pathophysiology remain poorly understood. Various hypotheses, including impaired lymphatic drainage, abnormal vascular permeability, immune dysregulation, and inflammatory reactions to demodex infestation, have been proposed to explain the etiology. CASE REPORT We present a case of a 61-year-old man with organized periocular edema of the upper third of the face, ultimately leading to Morbihan disease diagnosis. The patient underwent a midface lift, allowing for tissue retrieval for histopathological examination of the eyelid edematous skin, which revealed chronic inflammation, ectasia of small lymphatic vessels, and features of demodex intrafollicular localization. These findings were not specific, but consistent with the diagnostic hypothesis. The patient was referred to a rheumatologist for further evaluation and treatment. He did not respond well to systemic corticosteroids and immunosuppressive therapy. Rather, this resulted in extension of the edema to the upper eyelid. The patient opted not to undergo further treatment. CONCLUSIONS Morbihan disease is often misdiagnosed due to its rarity and overlapping clinical features with other facial conditions. Its management is challenging and can require a combination of medical and surgical interventions. Systemic corticosteroids, immunosuppressive agents, and topical treatments have had varying success. Surgical procedures, such as blepharoplasty or laser therapy, can be considered in severe cases. Early recognition and appropriate management are crucial to improving patient outcomes and quality of life.
Topics: Humans; Male; Middle Aged; Edema; Mite Infestations; Eyelid Diseases; Animals; Inflammation; Chronic Disease
PubMed: 38872283
DOI: 10.12659/AJCR.943421 -
Scientific Reports Jun 2024Of the early Eocene amber deposits known across the world, Belgian amber has been mostly absent from the relevant literature. We reinvestigated amber held in the...
Of the early Eocene amber deposits known across the world, Belgian amber has been mostly absent from the relevant literature. We reinvestigated amber held in the palaeobotanical collection of the Royal Belgian Institute of Natural Sciences, Brussels, which derived from three localities in Belgium that originated from two geographical areas (Leval-Trahegnies and Orp-le-Grand). Using Fourier transform infrared (FTIR) spectroscopy we show the close chemical relationship of Belgian amber to the early Eocene Oise amber from the Paris Basin, and highlight the potential effect of weathering on the amber chemistry. The amber derives from a very similar botanical source as the Oise amber (Combretaceae or Leguminosae-Caesalpinioideae), but from different coeval basins. The two Leval-Trahegnies localities provided amber that exhibit different stages of weathering (heavily fissured and crazed, darkened) and lacking any inclusions. The Orp-le-Grand locality provided the least weathered amber, with one amber piece containing two inclusions: a mite and a new genus and species of hemipteran (Cativolcus uebruum gen. et sp. nov.), and a second one that preserved the impression of insect wings pressed into the surface.
Topics: Belgium; Amber; Fossils; Animals; France; Spectroscopy, Fourier Transform Infrared; Mites; Hemiptera; Paleontology
PubMed: 38871833
DOI: 10.1038/s41598-024-64286-z -
Experimental & Applied Acarology Jun 2024Bory Tucholskie National Park, founded in 1996, is one of the most recently established national parks in Poland, and therefore, has not been thoroughly examined yet....
Bird nesting boxes as a specific artificial microenvironment increasing biodiversity of mites from the suborder Uropodina (Acari: Mesostigmata): a case study of Bory Tucholskie National Park.
Bory Tucholskie National Park, founded in 1996, is one of the most recently established national parks in Poland, and therefore, has not been thoroughly examined yet. The authors of the current study present results of their research concerning communities of mites from the suborder Uropodina (Acari: Mesostigmata), inhabiting bird nesting boxes within the area of Bory Tucholskie National Park. The mite community comprises two nidicolous species, i.e. Leiodinychus orbicularis (C.L. Koch, 1839) and Chiropturopoda nidiphila (Wiśniewski and Hirschmann 1993). The former is a species characteristic of various types of nests, as well as nesting boxes, where it is usually the eudominant species. The latter is an extremely rare and scarce species of Uropodina, known thus far from woodpeckers' hollows. The population of L. orbicularis in the analysed communities in the realm of Bory Tucholskie National Park has been estimated to be over 6,000 specimens, and in the case of Ch. nidiphila - over 400 specimens.
Topics: Animals; Mites; Poland; Biodiversity; Parks, Recreational; Birds; Nesting Behavior; Ecosystem
PubMed: 38869729
DOI: 10.1007/s10493-024-00912-9