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  1. Article ; Online: Study on the Effect and Mechanism of Antibacterial Adhesive Hydrogel on Wound Healing

    Xiaodong Wang / Xuehong Pan / Nana Zhao / Defang Chen

    Computational and Mathematical Methods in Medicine, Vol

    2021  Volume 2021

    Abstract: Bleeding and infection can cause significant increases in mortalities. Hydrogel sealants have attracted extensive attention for their ability to control bleeding. In this study, the adjuvant treatment with antibacterial adhesive hydrogel dressings was ... ...

    Abstract Bleeding and infection can cause significant increases in mortalities. Hydrogel sealants have attracted extensive attention for their ability to control bleeding. In this study, the adjuvant treatment with antibacterial adhesive hydrogel dressings was applied to patients with deep second-degree burns/scalds. The traditional medical dressing was regarded as control adjuvant treatment. The results indicated that the total positive rate of bacteria in wound secretions and the pain during dressing change in patients who used antibacterial adhesive hydrogel dressings were significantly reduced. The number of fibroblasts and new capillaries in the granulation tissue of the wound increased, and the patient’s wound healing is accelerated. The overall clinical effectiveness has been significantly improved. It is proven that the antibacterial adhesive hydrogel dressing has a significant effect on wound healing.
    Keywords Computer applications to medicine. Medical informatics ; R858-859.7
    Subject code 616
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Hindawi Limited
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Immune Activation and Inflammatory Response Mediated by the NOD/Toll-like Receptor Signaling Pathway—The Potential Mechanism of Bullfrog ( Lithobates catesbeiana ) Meningitis Caused by Elizabethkingia miricola

    Fulong Li / Baipeng Chen / Ming Xu / Yang Feng / Yongqiang Deng / Xiaoli Huang / Yi Geng / Ping Ouyang / Defang Chen

    International Journal of Molecular Sciences, Vol 24, Iss 14554, p

    2023  Volume 14554

    Abstract: Elizabethkingia miricola is an emerging opportunistic pathogen that is highly pathogenic in both immunocompromised humans and animals. Once the disease occurs, treatment can be very difficult. Therefore, a deep understanding of the pathological mechanism ...

    Abstract Elizabethkingia miricola is an emerging opportunistic pathogen that is highly pathogenic in both immunocompromised humans and animals. Once the disease occurs, treatment can be very difficult. Therefore, a deep understanding of the pathological mechanism of Elizabethkingia miricola is the key to the prevention and control of the disease. In this study, we isolated the pathogenic bacteria from bullfrogs with dark skin color, weak limbs, wryneck, and cataracts. Via subsequent morphological observations and a 16S rRNA gene sequence analysis, the pathogen was identified as Elizabethkingia miricola . The histopathological and transmission electron microscopy analysis revealed that the brain was the main target organ. Therefore, brain samples from diseased and healthy bullfrogs were used for the RNA-Seq analysis. The comparative transcriptome analysis revealed that the diseased bullfrog brain was characterized by the immune activation and inflammatory response, which were mediated by the “NOD-like receptor signaling pathway” and the “Toll-like receptor signaling pathway”. We also performed qRT-PCR to examine the expression profile of inflammation-related genes, which further verified the reliability of our transcriptome data. Based on the above results, it was concluded that the NOD/Toll-like receptor-related networks that dominate the immune activation and inflammatory response were activated in the brain of Elizabethkingia miricola -infected bullfrogs. This study contributes to the search for therapeutic targets for bullfrog meningitis and provides basic information for establishing effective measures to prevent and control bullfrog meningitis.
    Keywords Elizabethkingia miricola ; Lithobates catesbeiana ; bacterial meningitis ; NOD-like receptor signaling pathway ; Toll-like receptor signaling pathway ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Subject code 572
    Language English
    Publishing date 2023-09-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Morphology of the Spleen in Oreochromis niloticus

    Yang He / Erlong Wang / Kaiyu Wang / Jun Wang / Wei Fan / Defang Chen / Qian Yang

    Animals, Vol 11, Iss 2934, p

    Splenic Subregions and the Blood-Spleen Barrier

    2021  Volume 2934

    Abstract: The spleen is a separate organ of the teleost, playing an essential role in immune reactions. The morphology of the spleen is different from the fish species. Little knowledge about the spleen structure and the blood splenic barrier (BSB) in Nile tilapia ...

    Abstract The spleen is a separate organ of the teleost, playing an essential role in immune reactions. The morphology of the spleen is different from the fish species. Little knowledge about the spleen structure and the blood splenic barrier (BSB) in Nile tilapia has been reported. To address this issue, we studied the histology of the spleen and the BSB in healthy Nile tilapia. The morphology of the spleen was observed, then H&E staining, modified Jame’s staining, and ultrastructural techniques were performed to portion the spleen into three subregions and analyze the location of components and fibers. Thereafter, vital staining of Nile tilapia with Trypan blue was conducted to elucidate the composition and function of BSB. Histologically, the spleen could be divided into three subregions (inner, middle, and outer). The venules, clumps of lymphocytes, and vessels were separately characterized features of the outer, middle, and inner layers. Post injection, Trypan blue was intercepted in the endotheliocytes of ellipsoids in the middle layer ( i.p. ) or was deposited to the reticular fibers surrounding the ellipsoids ( i.v. ). Additionally, the amount of Trypan blue was shown to be positively correlated to that of the Acid phosphatase expressed. In conclusion, the spleen could be portioned into three subregions, and the BSB lay in the middle layer, composed of the cuboidal-shaped endotheliocytes and the surrounding reticular fibers of the ellipsoid capillaries. The present study enriched the research of immune tissues and system in tilapia and provided reference for the study of spleen in other fish species.
    Keywords Nile tilapia ; spleen ; subregion ; blood-spleen barrier ; Veterinary medicine ; SF600-1100 ; Zoology ; QL1-991
    Subject code 630
    Language English
    Publishing date 2021-10-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Transcriptome Revealed the Macrophages Inflammatory Response Mechanism and NOD-like Receptor Characterization in Siberian Sturgeon ( Acipenser baerii )

    Defang Chen / Yinqiu Chen / Lu Lu / Hao Zhu / Xin Zhang / Xiaoli Huang / Zhiqiong Li / Ping Ouyang / Xiaoli Zhang / Liangyu Li / Yi Geng

    International Journal of Molecular Sciences, Vol 24, Iss 9518, p

    2023  Volume 9518

    Abstract: Nucleotide-binding and oligomerization domain-like receptors (NOD-like receptors, NLRs) can regulate the inflammatory response to eliminate pathogens and maintain the host’s homeostasis. In this study, the head kidney macrophages of Siberian sturgeon ... ...

    Abstract Nucleotide-binding and oligomerization domain-like receptors (NOD-like receptors, NLRs) can regulate the inflammatory response to eliminate pathogens and maintain the host’s homeostasis. In this study, the head kidney macrophages of Siberian sturgeon were treated with lipopolysaccharide (LPS) to induce inflammation by evaluating the expression of cytokines. The high-throughput sequencing for macrophages after 12 h treatment showed that 1224 differentially expressed genes (DEGs), including 779 upregulated and 445 downregulated, were identified. DEGs mainly focus on pattern recognition receptors (PRRs) and the adaptor proteins, cytokines, and cell adhesion molecules. In the NOD-like receptor signaling pathway, multiple NOD-like receptor family CARD domains containing 3-like (NLRC3-like) were significantly downregulated, and pro-inflammatory cytokines were upregulated. Based on the transcriptome database, 19 NLRs with NACHT structural domains were mined and named in Siberian sturgeon, including 5 NLR-A, 12 NLR-C, and 2 other NLRs. The NLR-C subfamily had the characteristics of expansion of the teleost NLRC3 family and lacked the B30.2 domain compared with other fish. This study revealed the inflammatory response mechanism and NLRs family characterization in Siberian sturgeon by transcriptome and provided basic data for further research on inflammation in teleost.
    Keywords Acipenser baerii ; LPS ; transcriptome ; inflammatory response ; cytokines ; NOD-like receptor ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Subject code 572
    Language English
    Publishing date 2023-05-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Evaluation of pathology and environmental variables contributing to hepatopancreatic necrosis syndrome of Chinese mitten crab, Eriocheir sinensis

    Xiaoli Huang / Yang Feng / Huimin Duan / Lu Zhao / Chao Yang / Yi Geng / Ping Ouyang / Defang Chen / Lizi Yin / Shiyong Yang

    Ecotoxicology and Environmental Safety, Vol 215, Iss , Pp 112157- (2021)

    2021  

    Abstract: Hepatopancreatic Necrosis Syndrome (HPNS) severely impacts the Chinese mitten crab (Eriocheir sinensis) industry. However, little knowledge of the aetiology and pathogenesis of the disease causes significant difficulties in its prevention and control. In ...

    Abstract Hepatopancreatic Necrosis Syndrome (HPNS) severely impacts the Chinese mitten crab (Eriocheir sinensis) industry. However, little knowledge of the aetiology and pathogenesis of the disease causes significant difficulties in its prevention and control. In this study, we conducted a pathological analysis of HPNS through time-integrated large-volume sampling, to clarify the disease characteristics and mechanism of HPNS-afflicted crabs; besides, animal models were constructed to verify the pathological diagnosis. The results showed that the hepatopancreas was the principal target organ of HPNS; multiple correspondence analysis revealed that the main histopathological characteristics included non-interstitial atrophic hepatopathy diseases such as hepatic tubule atrophy, dilated hepatic tubules, and hepatic tubule necrosis. Additionally, the muscles also showed signs of disease, including myofibre atrophy, necrosis, and inflammation. Ultrastructural studies showed prominent apoptosis and autophagy-like alterations in the hepatopancreas of HPNS-afflicted crabs. Further, the establishment of animal models revealed that the double variate stimulation of environmental variables such as abamectin/sewage with nutrition deficiency could result in HPNS-similar lesions. Based on these studies, we concluded that HPNS is a chronic hepatopancreas-initiated energy-consumed disease with a low likelihood of pathogen but a high probability of environment and nutrition.
    Keywords Eriocheir sinensis ; Hepatopancreatic necrosis syndrome ; Pathological evaluation ; Multiple correspondence analysis ; Environmental variables ; Animal model ; Environmental pollution ; TD172-193.5 ; Environmental sciences ; GE1-350
    Subject code 630
    Language English
    Publishing date 2021-06-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Dietary isoleucine improved flesh quality, muscle antioxidant capacity, and muscle growth associated with AKT/TOR/S6K1 and AKT/FOXO3a signaling in hybrid bagrid catfish (Pelteobagrus vachelli♀ × Leiocassis longirostris♂)

    Qin Jiang / Mingyao Yan / Ye Zhao / Xiaoqiu Zhou / Long Yin / Lin Feng / Yang Liu / Weidan Jiang / Pei Wu / Yan Wang / Defang Chen / Shiyong Yang / Xiaoli Huang / Jun Jiang

    Journal of Animal Science and Biotechnology, Vol 12, Iss 1, Pp 1-

    2021  Volume 15

    Abstract: Abstract Background Muscle is the complex and heterogeneous tissue, which comprises the primary edible part of the trunk of fish and mammals. Previous studies have shown that dietary isoleucine (Ile) exerts beneficial effects on growth in aquatic animals. ...

    Abstract Abstract Background Muscle is the complex and heterogeneous tissue, which comprises the primary edible part of the trunk of fish and mammals. Previous studies have shown that dietary isoleucine (Ile) exerts beneficial effects on growth in aquatic animals. However, there were limited studies regarding the benefits of Ile on fish muscle and their effects on flesh quality and muscle growth. Thus, this study was conducted to explore whether dietary Ile had affected flesh quality and muscle growth in hybrid bagrid catfish (Pelteobagrus vachelli♀ × Leiocassis longirostris♂). Methods A total of 630 hybrid fish, with an initial average body weight of 33.11 ± 0.09 g, were randomly allotted into seven experimental groups with three replicates each, and respectively fed seven diets with 5.0, 7.5, 10.0, 12.5, 15.0, 17.5, and 20.0 g Ile/kg diets for 8 weeks. Results In the present study, we demonstrated that Ile significantly: (1) increased muscle protein and lipid contents and the frequency distribution of myofibers with ≤ 20 μm and ≥ 50 μm of diameter; (2) improved pH value, shear force, cathepsin B and L activities, hydroxyproline content, resilience, cohesiveness, and decreased cooking loss, lactate content, hardness, springiness, gumminess, and chewiness; (3) decreased reactive oxygen species (ROS), malondialdehyde (MDA), and protein carbonyl (PC) contents, GCLC and Keap1 mRNA levels, and up-regulated CuZnSOD, CAT, GPX1a, GST, and Nrf2 mRNA levels; (4) up-regulated the insulin-like growth factor 1, 2 (IGF-1, IGF-2), insulin-like growth factor 1 receptor (IGF-1R), proliferating cell nuclear antigen (PCNA), Myf5, Myod, Myog, Mrf4, and MyHC mRNA levels, and decreased MSTN mRNA level; (5) increased muscle protein deposition by activating AKT-TOR-S6K1 and AKT-FOXO3a signaling pathways. Conclusion These results revealed that dietary Ile improved flesh quality, which might be due to increasing nutritional content, physicochemical, texture parameters, and antioxidant ability; promoting muscle growth by affecting myocytes hyperplasia and hypertrophy, and muscle protein deposition associated with protein synthesis and degradation signaling pathways. Finally, the quadratic regression analysis of chewiness, ROS, and protein contents against dietary Ile levels suggested that the optimal dietary Ile levels for hybrid bagrid catfish was estimated to be 14.19, 12.36, and 12.78 g/kg diet, corresponding to 36.59, 31.87, and 32.96 g/kg dietary protein, respectively.
    Keywords Antioxidant capacity ; Flesh quality ; Hybrid bagrid catfish ; Isoleucine ; Myogenesis ; Protein deposition ; Animal culture ; SF1-1100 ; Veterinary medicine ; SF600-1100
    Subject code 571 ; 590
    Language English
    Publishing date 2021-04-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Autolysis in Crustacean Tissues after Death

    Xiaoli Huang / Guanqing Xiong / Xia Chen / Ruisi Liu / Minghao Li / Lili Ji / Xiaoli Zhang / Yi Geng / Yangping Ou / Defang Chen / Lizi Yin / Liangyu Li / Shiyong Yang

    BioMed Research International, Vol

    A Case Study Using the Procambarus clarkii Hepatopancreas

    2021  Volume 2021

    Abstract: Autolysis is an internal phenomenon following the death of an organism that leads to the degradation of tissues. In order to explore the initial stages of autolysis and attempt to establish reference standards for tissue changes after death, we studied ... ...

    Abstract Autolysis is an internal phenomenon following the death of an organism that leads to the degradation of tissues. In order to explore the initial stages of autolysis and attempt to establish reference standards for tissue changes after death, we studied the rapidly autolyzing tissue of the crayfish hepatopancreas. Samples from the hepatopancreas of crayfish were examined 0, 5, 10, 30, 60, and 120 minutes after death. Histological and ultrapathological examinations and evaluations and apoptotic cell counts were conducted to determine the initiation time and degree of autolysis. The results showed that autolysis in the hepatopancreas of crayfish began within 5 minutes. Initially, autolysis manifested in the swelling of hepatic tubular cells and the widening of mesenchyme. Cells undergoing autolysis showed severe organelle necrolysis. Based on these observations, tissue samples should be collected and preserved within five minutes to avoid interfering with histopathological diagnoses.
    Keywords Medicine ; R
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Hindawi Limited
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Genomic structure and molecular characterization of NLRC3-like from Siberian sturgeon (Acipenser baerii) and expression response to Streptococcus iniae and pathogen-associated molecular patterns

    Jiaxi Liu / Lu Lu / Lulu Liu / Daiyu Chen / Fei Yang / Yi Geng / Zhiqiong Li / Xiaoli Huang / Ping Ouyang / Jun Wang / Defang Chen

    Fish and Shellfish Immunology Reports, Vol 2, Iss , Pp 100042- (2021)

    2021  

    Abstract: NLRs are important intracellular pattern recognition receptors and play an essential role in innate immunity for vertebrates. However, research on sturgeon NLRs is still scarce. In this study, the NLRC3-like gene from Siberian sturgeon (Acipenser baerii) ...

    Abstract NLRs are important intracellular pattern recognition receptors and play an essential role in innate immunity for vertebrates. However, research on sturgeon NLRs is still scarce. In this study, the NLRC3-like gene from Siberian sturgeon (Acipenser baerii) (AbNLRC3-like) was cloned and characterized. The AbNLRC3-like full-length cDNA was composed of 3310 bp with a 166 bp of 5′-UTR, 2838 bp open reading frame (ORF) and 306 bp 3′-UTR, encoding 945 amino acids. Structural analysis of AbNLRC3-like showed the typical NLRs structure, including a central NACHT domain and a C-terminal 12 LRR motifs. Quantitative real-time PCR (qRT-PCR) analysis revealed that AbNLRC3-like was widely distributed in all tested tissues with a relatively high expression level in the mid-kidney, head-kidney and spleen. After Streptococcus iniae infection, the mRNA expression of AbNLRC3-like was significantly up-regulated at the pre-mortality period and the recovering period in valvula intestine, but it was significantly down-regulated around the mortality period in the duodenum and spleen. In splenic leukocyte, the mRNA expression of AbNLRC3-like was significantly induced by LPS, PGN and Poly(I:C). These results suggested that AbNLRC3-like may play a critical role in the immune response of Siberian sturgeon during pathogen challenge. To our best knowledge, this is the first report of the NLRC3 gene in sturgeon.
    Keywords Siberian sturgeon ; NLRC3 ; Streptococcus iniae ; PAMPs ; Immune response ; Zoology ; QL1-991
    Subject code 570
    Language English
    Publishing date 2021-12-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Increasement of Cd adsorption capacity of rice stubble from being alive until death in a modified rice-fish system

    Wei Luo / Ning Zhang / Zhengjie Li / Zhou Xu / Dongjie Wang / Guoping Liao / Guojun Pang / Guodong Xu / Yiyao Wang / Xiaoli Huang / Defang Chen / Cong Zeng / Zongjun Du

    Ecotoxicology and Environmental Safety, Vol 208, Iss , Pp 111441- (2021)

    2021  

    Abstract: Soil heavy metal contamination is an increasingly urgent problem throughout the world. Phytoremediation is a cost-effective and ecologically friendly in situ method for the remediation of heavy metal contaminated soils. Rice has the potential for use in ... ...

    Abstract Soil heavy metal contamination is an increasingly urgent problem throughout the world. Phytoremediation is a cost-effective and ecologically friendly in situ method for the remediation of heavy metal contaminated soils. Rice has the potential for use in soil remediation due to its high biomass production, however, risks related to food safety and low accumulation potential exist. Therefore, in the current study, rice stubble was used as the adsorbent in a modified rice-fish system (MRFS) to assess its accumulation capacity in a model paddy field dosed with 0–40.0 mg kg−1 Cd. The weighted mean concentration (WMC) of Cd in rice stubble increased from 0.498 to 36.365 mg kg−1 to 1.038–71.180 mg kg−1 from 0 to 60 days post-harvest (dph), and the corresponding increment rate was 107.68%, 117.42%, 157.77% and 95.73%, respectively. Sixty-days post-harvest, removal rate of Cd from contaminated soils was 1.11–1.40%, which was greater than that of the Cd-hyperaccumulator Thlaspi caerulescens. The WMC of the heavy metals Cd, Zn, Pb, Cr and Cu in rice stubble increased 51.11–97.50%, and removal rate was 1.93–2.66%. Overall, rice stubble had a high capacity of heavy metal accumulation, mainly benefiting from the synthesis effects of MRFS and the changes of accumulation mechanism within the plant from being alive until death. Notably, this study also provides a new idea for in situ, herbage-based phytoremediation of heavy metal-contaminated soils.
    Keywords Cd contamination ; Accumulation ; Rice-fish system ; Rice stubble ; Phytoremediation ; in Situ ; Environmental pollution ; TD172-193.5 ; Environmental sciences ; GE1-350
    Subject code 500
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Microbial analysis reveals the potential colonization of pathogens in the intestine of crayfish (Procambarus clarkii) in traditional aquaculture environments

    Yang Feng / Minghao Li / Huimin Duan / Liangyu Li / Ping Ouyang / Defang Chen / Yi Geng / Xiaoli Huang / Shiyong Yang / Lizi Yin / Jun Jiang / Xiaoli Zhang

    Ecotoxicology and Environmental Safety, Vol 224, Iss , Pp 112705- (2021)

    2021  

    Abstract: The microbiota of the intestine produces a wide array of biologically active molecules and together act as a composite endocrine organ. Due to our limited understanding of bacterial communities in aquaculture ecosystems, it is necessary to evaluate the ... ...

    Abstract The microbiota of the intestine produces a wide array of biologically active molecules and together act as a composite endocrine organ. Due to our limited understanding of bacterial communities in aquaculture ecosystems, it is necessary to evaluate the interactions between environmental and intestinal microbiota and the potential consequences of disease. This study taken the traditional P. clarkii culture in the Sichuan Basin as an example, and analyzed the relationships between the microbiota of the environment and host through microbial analysis and microbiological diagnosis. Our results showed that the bacterial abundance in sediment was greater than in water, followed by the intestine, and some of bacteria from the environment successfully selected to colonize the intestine. The bacterial composition in the intestines of diseased and healthy crayfish was significantly different. The bacteria that colonized and proliferated in the intestine had very low abundances in sediment and water. Two potential pathogens, Aeromonas veronii, and Citrobacter freundii, and two potential probiotics, Lactococcus garvieae and Exiguobacterium undae, were identified. Using multiple, real, and traditional P. clarkii aquaculture sites in the Sichuan Basin, this study revealed that the microbial communities of the environment and animal host did indeed interact. Furthermore, these results indicated that P. clarkii in a healthy status are capable of regulating which bacteria colonize their intestines.
    Keywords Procambarus clarkii ; Environment-host interaction ; Microbial community ; Potential pathogen colonization ; Traditional cultivation pattern ; Microbiota analysis ; Environmental pollution ; TD172-193.5 ; Environmental sciences ; GE1-350
    Subject code 333
    Language English
    Publishing date 2021-11-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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