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Camel milk plays a critical role in the diet of peoples belongs to the semi-arid and arid regions. Since prehistoric times, camel milk marketing was limited due to lacking the processing facilities in the camel-rearing areas, nomads practiced the self-consumption of raw and fermented camel milk. A better understanding of the techno-functional properties of camel milk is required for product improvement to address market and customer needs. Despite the superior nutraceutical and health promoting potential, limited camel dairy products are available compared to other bovines. It is a challenging impetus for the dairy industry to provide diversified camel dairy products to consumers with superior nutritional and functional qualities. The physicochemical behavior and characteristics of camel milk is different than the bovine milk, which poses processing and technological challenges. Traditionally camel milk is only processed into various fermented and non-fermented products; however, the production of commercially important dairy products (cheese, butter, yogurt, and milk powder) from camel milk still needs to be processed successfully. Therefore, the industrial processing and transformation of camel milk into various products, including fermented dairy products, pasteurized milk, milk powder, cheese, and other products, require the development of new technologies based on applied research. This review highlights camel milk's processing constraints and techno-functional properties while presenting the challenges associated with processing the milk into various dairy products. Future research directions to improve product quality have also been discussed.
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An infection induces the migration of immune cells called hemocytes to the insect heart, where they aggregate around heart valves called ostia and phagocytose pathogens in areas of high hemolymph flow. Here, we investigated whether the cardiac extracellular matrix proteins, Pericardin (Prc) and Lonely heart (Loh), regulate the infection-induced aggregation of periostial hemocytes in the mosquito, An. gambiae. We discovered that RNAi-based post-transcriptional silencing of Prc or Loh did not affect the resident population of periostial hemocytes in uninfected mosquitoes, but that knocking down these genes decreases the infection-induced migration of hemocytes to the heart. Knocking down Prc or Loh did not affect the proportional distribution of periostial hemocytes along the periostial regions. Moreover, knocking down Prc or Loh did not affect the number of sessile hemocytes outside the periostial regions, suggesting that the role of these proteins is cardiac-specific. Finally, knocking down Prc or Loh did not affect the amount of melanin at the periostial regions, or the intensity of an infection at 24 h after challenge. Overall, we demonstrate that Prc and Loh are positive regulators of the infection-induced migration of hemocytes to the heart of mosquitoes.
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Anopheles , Hemócitos , Proteínas de Insetos , Animais , Hemócitos/metabolismo , Hemócitos/fisiologia , Hemócitos/imunologia , Proteínas de Insetos/metabolismo , Proteínas de Insetos/genética , Anopheles/imunologia , Proteínas da Matriz Extracelular/metabolismo , Proteínas da Matriz Extracelular/genética , Movimento Celular , Interferência de RNA , Agregação Celular/imunologia , Fagocitose , Melaninas/metabolismoRESUMO
Immune-priming occurs in insects after a prior pathogen exposure. However, its underlying mechanism in insects remains elusive. In the present work, immune-priming was detected in a lepidopteran insect, Spodoptera exigua. Specifically, a prior infection with a heat-killed pathogenic bacterium, Escherichia coli, led to increased survival upon the second infection of different pathogens. Plasma collected from larvae with the prior infection possessed the immune-priming factor(s) that significantly up-regulated cellular and humoral immune responses of naïve larvae. Our study also finds that variations in the timing of plasma collection for priming larvae resulted in distinct impacts on both cellular and humoral responses. However, when the active plasma exhibiting the immune-priming was heat-treated, it lost this priming activity, therefore suggesting that protein factor(s) play a role in this immune-priming. An immunofluorescence assay showed that the hemocytes collected from the immune-primed larvae highly reacted to a polyclonal antibody specific to a vertebrate lipocalin, apolipoprotein D (ApoD). Among 27 ApoD genes (Se-ApoD1 â¼ Se-ApoD27) of S. exigua, Se-ApoD3 was found to be highly induced during the immune-priming, in which it was shown to be expressed in hemocytes and fat body from a fluorescence in situ hybridization analysis. RNA interference of Se-ApoD3 expression significantly impaired the immune-priming of S. exigua larvae. Moreover, the inhibition of eicosanoid biosynthesis suppressed the immune-priming, in which treatment with a lipoxygenase (LOX) inhibitor-and not treatment with a cyclooxygenase inhibitor-suppressed immune-priming. Further, an addition of LOX product such as lipoxin A4 or lipoxin B4 significantly rescued the lost immune-priming activity. Taken together, these results suggest that a complex of ApoD3 and LOX product mediates the immune-priming activity of S. exigua.
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Apolipoproteínas , Escherichia coli , Hemócitos , Proteínas de Insetos , Larva , Spodoptera , Animais , Spodoptera/imunologia , Proteínas de Insetos/metabolismo , Proteínas de Insetos/genética , Proteínas de Insetos/imunologia , Escherichia coli/imunologia , Larva/imunologia , Hemócitos/imunologia , Hemócitos/metabolismo , Apolipoproteínas/metabolismo , Apolipoproteínas/imunologia , Apolipoproteínas/genética , Imunidade Humoral , Lipoxigenase/metabolismo , Lipoxigenase/genética , Lipoxigenase/imunologia , Imunidade CelularRESUMO
This study reports the draft genome of Leuconostoc falkenbergense strain BSMRAU-M1L5, isolated from artisanal buffalo milk curd in Bangladesh. The draft genome spans 1,776,471 bp, with 50× coverage and 96 contigs.
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We sequenced the genome of Leuconostoc citreum strains BSMRAU-M1L6 and BSMRAU-M1L13 isolated from artisanal buffalo milk curd in Bangladesh. The draft genomes of BSMRAU-M1L6 and BSMRAU-M1L13 are 1,869,891 and 1,890,611 bp, respectively, with 50.0× coverage (both) and 65 and 75 contigs, respectively.
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Traditional medicines are becoming more popular as people become more aware of the dangers of synthetic pharmaceuticals. Tribulus terrestris L., (Gokharu) an annual herbaceous plant, has been extensively utilized by herbalists for numerous medicinal purposes. T. terrestris has been studied for its multiple therapeutic effects, including immunomodulatory, aphrodisiac, anti-urolithic, absorption enhancer, cardioprotective, antidiabetic, anti-inflammatory, hypolipidemic, neuro-protective, anticancer, and analgesic properties. Saponins and flavonoids are two examples of beneficial substances that have recently been found in T. terrestris. These chemicals are very important for a variety of therapeutic effects. Numerous studies have shown that T. terrestris products and various parts may have antioxidant, anti-inflammatory, anti-cancer, anti-diabetic, testosterone-boosting, and liver protective effects. According to the published evidence, T. terrestris boosts testosterone secretion, regulates blood pressure, and protects the human body against injuries. The cardiovascular, reproductive, and urinary systems are all severely impacted. Due to its potent bioactive compounds, the literature evaluated from a wide range of sources including books, reports, PubMed, ScienceDirect, Wiley, Springer, and other databases demonstrated the extraordinary potential to treat numerous human and animal ailments. Our review is different from other published articles because we explored its importance for humans and especially in veterinary like poultry health. It could also be used as an aphrodisiac to treat different fertility-related disorders in human and animal science. More research into the pharmacodynamics of herbs like T. terrestris is needed so that it can be used in a wider variety of nutraceutical products for humans and poultry.
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Lactoferrin is a natural cationic iron-binding glycoprotein of the transferrin family found in bovine milk and other exocrine secretions, including lacrimal fluid, saliva, and bile. Lactoferrin has been investigated for its numerous powerful influences, including anticancer, anti-inflammatory, anti-oxidant, anti-osteoporotic, antifungal, antibacterial, antiviral, immunomodulatory, hepatoprotective, and other beneficial health effects. Lactoferrin demonstrated several nutraceutical and pharmaceutical potentials and have a significant impact on improving the health of humans and animals. Lactoferrin plays a critical role in keeping the normal physiological homeostasis associated with the development of pathological disorders. The current review highlights the medicinal value, nutraceutical role, therapeutic application, and outstanding favorable health sides of lactoferrin, which would benefit from more exploration of this glycoprotein for the design of effective medicines, drugs, and pharmaceuticals for safeguarding different health issues in animals and humans.
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Proteínas de Ligação ao Ferro , Lactoferrina , Animais , Humanos , Lactoferrina/farmacologia , Transferrina , Glicoproteínas , Antioxidantes , Suplementos NutricionaisRESUMO
In terms of delivery systems for active compounds, orally disintegrating films are a great option. The initial stage in creating an oral disintegrating film is selecting a film-forming polymer. The basic polymers combination Microcrystalline Cellulose (MCC), which is co-processed with Carboxymethylcellulose Sodium (CMC) and hydroxypropylmethyl cellulose were used to create an oral disintegrating film that contains cholecalciferol (Vitamin D3), a fat-soluble vitamin that aids in the body's absorption of calcium and phosphorus. The goal of the current inquiry was to develop orally disintegrating films of vitamin D3 to improve patient comfort and compliance for pediatric or elderly patients due to its simplicity of administration. Films containing drugs and made of the appropriate plasticizer and chosen polymers demonstrated outstanding film forming and folding endurance. The dissolution test showed that Vitamin D3 has a rapid disintegration property, with the majority of it dissolving in the medium (pH 6.8) in less than two minutes after being inserted. To verify that the films were successfully formed, a variety of procedures including HPLC, FT-IR and microscopic studies were employed. When kept at 40oC with humidity of 75%, the film showed good stability for at least three months.
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Colecalciferol , Polímeros , Humanos , Criança , Idoso , Espectroscopia de Infravermelho com Transformada de Fourier , Solubilidade , Polímeros/química , Derivados da Hipromelose/química , Administração OralRESUMO
Quality improvement in clinical laboratories is crucial to ensure accurate and reliable test results. With increasing awareness of the potential adverse effects of errors in laboratory practice on patient outcomes, the need for continual improvement of laboratory services cannot be overemphasized. A literature search was conducted on PubMed and a web of science core collection between October and February 2021 to evaluate the scientific literature quality of clinical laboratory quality improvement; only peer-reviewed articles written in English that met quality improvement criteria were included. A structured template was used to extract data, and the papers were rated on a scale of 0-16 using the Quality Improvement Minimum Quality Criteria Set (QI-MQCS). Out of 776 studies, 726 were evaluated for clinical laboratory literature quality analysis. Studies were analyzed according to the quality improvement and control methods and interventions, such as training, education, task force, and observation. Results showed that the average score of QI-MQCS for quality improvement papers from 1981-2000 was 2.5, while from 2001-2020, it was 6.8, indicating continuous high-quality improvement in the clinical laboratory sector. However, there is still room to establish a proper system to judge the quality of clinical laboratory literature and improve accreditation programs within the sector.
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Camel milk has a significant and pivotal role in the diet of people residing in semi-arid and arid regions. Ever since ancient times, marketing of camel milk has remained insignificant due to nonexistence of processing amenities in the camel nurturing areas, hence the utilization of unprocessed camel milk has continuously remained limited at family level by the nomads. Due to the superior medicinal values and health promoting effects, incredible growth in the demand of camel milk and dairy products have been noticed all over the world during last two decades. Such emergence has led dairy industry to provide diversified camel dairy products to the consumers with superior nutritional and functional qualities. In contrast to bovine, very few food products derived from camel milk are available in the present market. With the advancements in food processing interventions, a wide range of dairy and non-dairy products could be obtained from camel milk, including milk powder, cheese, yogurt, ice cream, and even chocolate. In some regions, camel milk is used for traditional dishes such as fermented milk, camel milk tea, or as a base for soups and stews. Current review highlights the processing opportunities regarding the transformation of camel milk into various dairy products via decreasing the inherent functionality that could be achieved by optimization of processing conditions and alteration of chemical composition by using fortification method. Additionally, future research directions could be devised to improve the product quality.
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Tomato spotted wilt virus (TSWV) causes a serious plant disease and is transmitted by specific thrips including the western flower thrips, Frankliniella occidentalis. The persistent and circulative virus transmission suggests an induction of immune defenses in the thrips. We investigated the immune responses of F. occidentalis to TSWV infection. Immunofluorescence assay demonstrated viral infection in the larval midguts at early stage and subsequent propagation to the salivary gland in adults. In the larval midgut, TSWV infection led to the release of DSP1, a damage-associated molecular pattern, from the gut epithelium into the hemolymph. DSP1 up-regulated PLA2 activity, which would lead to biosynthesis of eicosanoids that activate cellular and humoral immune responses. Phenoloxidase (PO) activity was enhanced following induction of PO and its activating protease gene expressions. Antimicrobial peptide genes and dual oxidase, which produces reactive oxygen species, were induced by the viral infection. Expression of four caspase genes increased and TUNEL assay confirmed apoptosis in the larval midgut after the virus infection. These immune responses to viral infection were significantly suppressed by the inhibition of DSP1 release. We infer that TSWV infection induces F. occidentalis immune responses, which are activated by the release of DSP1 from the infection foci within midguts.
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Tisanópteros , Tospovirus , Animais , Tisanópteros/genética , Tisanópteros/metabolismo , Tospovirus/genética , Tospovirus/metabolismo , Larva , Flores , Doenças das PlantasRESUMO
Two cream-coloured strains (JC732T, JC733) of Gram-stain negative, mesophilic, catalase and oxidase positive, aerobic bacteria which divide by budding, form crateriform structures, and cell aggregates were isolated from marine habitats of Andaman and Nicobar Islands, India. Both strains had genome size of 7.1 Mb and G + C content of 58.9%. Both strains showed highest 16S rRNA gene-based similarity with Blastopirellula retiformator Enr8T (98.7%). Strains JC732T and JC733 shared 100% identity of 16S rRNA gene and genome sequences. The coherence of both strains with the genus Blastopirellula was supported by the 16S rRNA gene based and the phylogenomic trees. Further, the chemo-taxonomic characters and the genome relatedness indices [ANI (82.4%), AAI (80.4%) and dDDH (25.2%)] also support the delineation at the species level. Both strains have the capability to degrade chitin and genome analysis shows the ability to fix N2. Based on the phylogenetic, phylogenomic, comparative genomic, morphological, physiological, and biochemical characteristics, strain JC732T is described as a new species of the genus Blastopirellula for which the name Blastopirellula sediminis sp. nov. is proposed, with strain JC733 as an additional strain.
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Ácidos Graxos , Fosfolipídeos , Fosfolipídeos/química , Ácidos Graxos/química , Filogenia , RNA Ribossômico 16S/genética , Ilhas , Análise de Sequência de DNA , DNA Bacteriano/genética , Técnicas de Tipagem BacterianaRESUMO
It is frequently asserted that high levels of economic growth are supported by economic freedom. For the period 1995-2021, this study examines the influence of the composed economic freedom index and several subcomponents of economic freedom on the economic growth of four South Asian economies, namely Bangladesh, India, Pakistan, and Sri Lanka. The Ordinary Least Squares, Random Effect Model, and Robust Least Squares approaches are utilized to estimate the composed and decomposed influence of economic freedom on economic growth. Robust Least Squares reflects the robustness of the connection between economic liberty and growth. According to the results of these tests, economic liberty has a strong and favorable stimulus on growth. When the different indicators of economic liberty are evaluated independently, we discovered that the magnitudes of most economic freedom indicators are significant. Conversely, monetary freedom contributes very little to economic expansion. The effects of government spending, public trust, and labor flexibility on economic expansion are hypothetical. The tax load hinders economic expansion in the economies under consideration. Property rights, freedom to do business, trade liberty, investment choice, and financial liberty all have a positive, strong, and sizeable stimulus on economic growth. The decomposed influence of each indicator of economic freedom will help develop policy choices.
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This study is aimed to determine and compare the antioxidant activity of Orange Peel Powder (OPP) in ghee at different temperatures (4 °C, 25 °C and 60 °C) for divergent storage periods (0, 7, 14 and 21 days). To compare the antioxidant potentiality, synthetic antioxidant BHA (Butylated Hydroxy Anisole) is used. Twelve ghee samples were prepared where one was control, another one was BHA treated and the rest ten were admixing OPP in ghee at different ratios. After sensory evaluation three highest scored ghee samples (0.5%. 1.0% and 1.5%) were selected. Samples were analyzed for peroxide (PV), thiobarbituric acid (TBA), free fatty acids (FFA) value and radical scavenging activity. Though storage temperature and storage period were increased OPP treated ghee samples peroxide, TBA and FFA values were lowered significantly compared to control samples. Moreover, 1.0% and 1.5% OPP treated ghee samples such values were lowered than BHA treated ghee samples and all these are on the favor of ghee quality. OPP treated ghee samples' DPPH quench potentiality is also stronger than BHA treated ghee samples. Therefore, OPP is a great source of antioxidants and this can be used in ghee as a natural source of antioxidants.
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Insect immunity defends the infection of an insect pathogenic bacterium, Bacillus thuringiensis (Bt). However, it was not clear on the recognition of Bt infection by the insect immune system. This study tested a physiological function of dorsal switch protein 1 (DSP1) in the Bt infection. DSP1 is classified into HMGB1-like damage-associated molecular pattern (DAMP) in insects. Upon Bt infection in a lepidopteran Spodoptera exigua, DSP1 was released from the nuclei of the midgut epithelium and activated immune responses. For this DSP1 release, a functional binding between Bt and its receptors on the midgut epithelium was required because any RNA interference (RNAi) treatments of Bt receptor (cadherin or ABCC) prevented the DSP1 release and became susceptible to the bacterial infection. The DSP1 release was required for the gene induction of Repat33, which is a member of response to pathogen gene family and its gene product mediated cellular and humoral immune responses against pathogen infection in S. exigua. The released DSP1 activated phospholipase A2 (PLA2) to produce eicosanoids, which induced the Repat33 expression because a hemocoelic injection of a recombinant DSP1 induced the Repat33 expression without Bt infection. However, any inhibition of PLA2 activity impaired the DAMP signaling between DSP1 and Repat33. DSP1 also up-regulated two other immune mediators, nitric oxide (NO) and a cytokine called plasmatocyte-spreading peptide (PSP). Either NO or PSP activated PLA2 to up-regulate Repat33 expression. These results suggest that Bt infection of the insect midgut generates a DAMP signal via DSP1 release, which turns on NO or the cytokine-PLA2-Repat33 immune signaling pathway.
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Bacillus thuringiensis , Infecções Bacterianas , Animais , Spodoptera , Citocinas , ImunidadeRESUMO
Several endocrine signals mediate mosquito egg development, including 20-hydroxyecdysone (20E). This study reports on prostaglandin E2 (PGE2) as an additional, but core, mediator of oogenesis in a human disease-vectoring mosquito, Aedes albopictus. Injection of aspirin (an inhibitor of cyclooxygenase (COX)) after blood-feeding (BF) inhibited oogenesis by preventing nurse cell dumping into a growing oocyte. The inhibitory effect was rescued by PGE2 addition. PGE2 was found to be rich in nurse cells and follicular epithelium after BF. RNA interference (RNAi) treatments of PG biosynthetic genes, including PLA2 and two COX-like peroxidases, prevented egg development. Interestingly, 20E treatment significantly increased the expressions of PG biosynthetic genes, while the RNAi of Shade (which is a 20E biosynthetic gene) expression prevented inducible expressions after BF. Furthermore, RNAi treatments of PGE2 receptor genes suppressed egg production, even under PGE2. These results suggest that a signaling pathway of BF-20E-PGE2 is required for early vitellogenesis in the mosquito.
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Aedes , Aspirina , Oócitos , Animais , Aedes/genética , Aspirina/farmacologia , Ciclo-Oxigenase 2/metabolismo , Dinoprostona/metabolismo , Oócitos/efeitos dos fármacos , Oócitos/metabolismo , Oogênese/efeitos dos fármacosRESUMO
Various microbiota including beneficial symbionts reside in the insect gut. Infections of pathogens cause dysregulation of the microflora and threaten insect survival. Reactive oxygen species (ROS) have been used in the gut immune responses, in which its production is tightly regulated by controlling dual oxidase (Duox) activity via Ca2+ signal to protect beneficial microflora and gut epithelium due to its high cytotoxicity. However, it was not clear how the insects discriminate the pathogens from the various microbes in the gut lumen to trigger ROS production. An entomopathogenic nematode (Steinernema feltiae) infection elevated ROS level in the gut lumen of a lepidopteran insect, Spodoptera exigua. Dorsal switch protein 1 (DSP1) localized in the nucleus in the midgut epithelium was released into plasma upon the nematode infection and activated phospholipase A2 (PLA2). The activated PLA2 led to an increase of PGE2 level in the midgut epithelium, in which rising Ca2+ signal up-regulated ROS production. Inhibiting DSP1 release by its specific RNA interference (RNAi) or specific inhibitor, 3-ethoxy-4-methoxyphenol, treatment failed to increase the intracellular Ca2+ level and subsequently prevented ROS production upon the nematode infection. A specific PLA2 inhibitor treatment also prevented the up-regulation of Ca2+ and subsequent ROS production upon the nematode infection. However, the addition of PGE2 to the inhibitor treatment rescued the gut immunity. DSP1 release was not observed at infection with non-pathogenic pathogens but detected in plasma with pathogenic infections that would lead to damage to the gut epithelium. These results indicate that DSP1 acts as a damage-associated molecular pattern in gut immunity through DSP1/PLA2/Ca2+/Duox.
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Dinoprostona , Insetos , Animais , Oxidases Duais , Espécies Reativas de Oxigênio/metabolismo , Insetos/metabolismo , Eicosanoides , Triptofano Oxigenase , Proteínas FúngicasRESUMO
While globalization has increased the movement and interconnection of goods, technology, and information, it has also affected employment. Many studies have analyzed the impact of globalization on employment creation resulting in positive and negative findings. However, an area of literature still needs to be explored studying how human capital affects the impact of globalization on employment creation. The current study contributes to the literature by analyzing the moderating role of human capital in the globalization-employment nexus in 26 Asian countries. For this, annual panel data were collected from 1996 to 2019. The estimations have been done using 12 model specifications, 6 for direct and 6 for indirect impact association between globalization and employment through the human capital channel. The study uses generalized least square (GLS) method and generalized method of moments (GMM) for empirical analysis. The static and dynamic analysis shows that globalization's direct and indirect impact on employment through the channel of human capital is positive. Industrial value added and economic growth leads to more employment creation, whereas population growth dampens it. Human capital plays a positive role in getting the advantage of globalization in terms of employment creation. This study confirms the literature recommendations of promoting human capital development to achieve globalization's benefits for more employment creation.
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Desenvolvimento Econômico , Internacionalidade , Humanos , Emprego , Tecnologia , Ásia , Dióxido de Carbono/análiseRESUMO
Phurealipids (Photorhabdus urea lipids) are synthesized from Photorhabdus bacteria that are symbiotic to entomopathogenic nematodes. Their chemical structures are similar to that of juvenile hormone (JH) and have been suspected to mimic JH signaling in immunity and the development of insects. This study investigated the physiological roles of phurealipids with respect to their contribution to bacterial pathogenicity using four natural (HB13, HB69, HB416, and HB421) and one derivative (HB27) compound. First, phurealipids like JH suppressed insect immune responses. Overall, phurealipids showed JH like immunosuppressive behavior in a lepidopteran insect Spodoptera exigua larvae. More specifically, phurealipids significantly suppressed the hemocyte spreading behavior which is a key immune response upon immune challenge. Interestingly, the methyl urea derivatives (HB13, HB27, and HB69) were more potent than the unmethylated forms (HB416 and HB421). The inhibitory activity of phurealipids prevented the cellular immune response measured by hemocytic nodule formation in response to the bacterial challenge. Phurealipids also suppressed the expression of cecropin and gallerimycin, which are two highly inducible antimicrobial peptides, in S. exigua upon immune challenge. The immunosuppressive activity of the phurealipids significantly enhanced the bacterial pathogenicity of Bacillus thuringiensis against S. exigua. Second, phurealipids like JH prevented insect metamorphosis. Especially, the methylated urea derivatives of the phurealipids showed the JH-like function by inducing the expression of S. exigua Kr-h1, a transcriptional factor. At the pupal stage, exhibiting the lowest expression of Kr-h1, phurealipid treatments elevated the expression level of Kr-h1 and delayed the pupa-to-adult metamorphosis. These results suggest that phurealipids play crucial roles in Photorhabdus pathogenicity by suppressing host immune defenses and delaying host metamorphosis.
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Hormônios Juvenis , Lipídeos , Photorhabdus , Animais , Proteínas de Insetos/metabolismo , Insetos , Larva/microbiologia , Metabolismo dos Lipídeos , Lipídeos/fisiologia , Photorhabdus/metabolismo , Pupa , Ureia/metabolismoRESUMO
Several mosquitoes transmit human pathogens by blood feeding, with the gut being the main entrance for the pathogens. Thus, the gut epithelium defends the pathogens by eliciting potent immune responses. However, it was unclear how the mosquito gut discriminates pathogens among various microflora in the lumen. This study proposed a hypothesis that a damage signal might be specifically induced by pathogens in the gut. The Asian tiger mosquito, Aedes albopictus, encodes dorsal switch protein 1 (Aa-DSP1) as a putative damage-associated molecular pattern (DAMP). Aa-DSP1 was localized in the nucleus of the midgut epithelium in naïve larvae. Upon infection by a pathogenic bacterium, Serratia marcescens, Aa-DSP1 was released to hemocoel and activated phospholipase A2 (PLA2). The activated PLA2 increased the level of prostaglandin E2 (PGE2) in the gut and subsequently increased Ca2+ signal to produce reactive oxygen species (ROS) via dual oxidase (Duox). Inhibition of Aa-DSP1 via RNA interference or specific inhibitor treatment failed to increase PGE2/Ca2+ signal upon the bacterial infection. Thus, the inhibitors specifically targeting eicosanoid biosynthesis significantly prevented the upregulation of ROS production in the gut and enhanced mosquito mortality after the bacterial infection. However, such inhibitory effects were rescued by adding PGE2. These suggest that Aa-DSP1 plays an important role in immune response of the mosquito gut as a DAMP during pathogen infection by triggering a signaling pathway, DSP1/PLA2/Ca2+/Duox.