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Recognizing Aeromonas hydrophila Infection in Patients with Extensive Skin Lesions an...
gongjie ye
Taohong Li

gongjie ye

and 3 more

August 27, 2024
Recognizing Aeromonas hydrophila Infection in Patients with Extensive Skin Lesions and Septic Shock: A Clinical Perspective
Identification of hub gens with B7 and the clear cell renal cell carcinoma of pathway...
Yinjia He
Kaiyi Cai

Yinjia He

and 5 more

August 27, 2024
(1)Background: The exact localization of abnormally expressed the tumor microenvironment(TME)of B7-H3 which is still unclear and requires investigation. Therefore, targeted non-immunotherapy regimens, which are represented by the B7 family, have emerged as new tumor vessel specific expression markers in renal clear cell carcinoma(ccRCC). (2)Methods: The relationship between differentially expressed genes (DEGs) and the B7 family in ccRCC samples was identified between the normal and tumor samples by treating ccRCC samples and the gene expression profiling of GSE108310. In 18 samples containing 5000 corresponding transcripts, the Differentially Expressed Genes and the pathway enrichment were dissected by R software. 43 up-regulated genes and 255 downregulated genes were selected in the Gene Expression Omnibus database. The KEGG method was applied to investigate what effects of most DEGs on phagocytosis, platelet activation, and agglutination. (3)Results: The protein interaction network map shows that the key genes, namely, the FYN, CD244, IL6, TNF, and VEGFA genes, are the most closely connected with the other genes, and combined with functional enrichment, we found that the differences in the key genes of expression in the TME are closely related to the B7 family, especially the VEGFA and B7-H3 on T cell regulation. Targeting the B7-H3 subset as a prominent biomarker for the vascular-specific expression of ccRCC cells is necessary because it providing strong support at the genetic analysis level. (4)Conclusion: The B7 family has great potential as biomarkers for ccRCC progression.
HIGH LEVEL PRODUCTION OF SARS-COV-2 ANTIBODIES ALSO AFFECTED THE FORMATION OF ANTI-NU...
Faruk DİŞLİ
Sedat Yildiz

Faruk Dişli

and 1 more

August 27, 2024
A document by Faruk DİŞLİ. Click on the document to view its contents.
PATTERN OF NEONATAL BEHAVIOUR OF MARWARI HORSE
Gireesh Joshi
Navav Singh

Gireesh Joshi

and 7 more

August 27, 2024
Marwari breed is at the watch list of endangered equine species in India, more and more studies required. It is essential to know the normal behaviour of mare and foal to enhance the production and reproduction efficiency of Marwari horses. Marwari breed is mainly a riding horse and pregnant mare kept for breeding needs to require adequate understanding of maternal behaviour for good health and management which directly affect its mothering ability and results in good mare-foal bonding and proper foal health and development. The strength of mare-foal bonding can be measured through quantification of behaviours such as the frequency and duration of nursing bouts, foal nuzzling, normal maternal aggression and avoidance and the prevalence of activities maintaining the proximity between mare and foal. Six mares along with their foal were selected from ICAR-NRCE Bikaner and private stud farm for study. Behaviour parameters were recorded through night vision infrared CCTV camera daily for 10 days period after foaling. Foal behaviour were divided into two different categories as (1)State behaviour i.e. walking, sleeping, standing etc. and were found to be statistically significant different (p<0.05) in Post partum period show graphically increasing pattern of mean plot at foaling time and (2) Frequent behaviour i.e. Duration of nursing, number of nursing, foal nuzzling, investigatory were found to be statistically significant different (p<0.05) in Post partum period show gradually increasing pattern of mean plot etc. and each specific behaviour pattern for classification was individually described in 6 hour phase wise and day wise. Further attempts were also made to observe the different foaling stages and foal behaviours i.e birth to first successful standing (min) was 77.12± 3.80, birth to successful nursing(min) was 119.18±4.17, Standing and nursing attempts(n) was 13.5±1.20 and 8.16±0.65 respectively, weight of placenta was 3.88 kg, eliminate meconium (min) was 171.1±10.65 etc
Metabolic Reprogramming in Cancer: Implications for Immunosuppressive Microenvironmen...
Durre Aden
Samreen Zaheer

Durre Aden

and 2 more

August 27, 2024
Cancer is a complex and heterogeneous disease characterized by uncontrolled cell growth and proliferation. One hallmark of cancer cells is their ability to undergo metabolic reprogramming, which allows them to sustain their rapid growth and survival. This metabolic reprogramming creates an immunosuppressive microenvironment that facilitates tumour progression and evasion of the immune system. In this paper, we review the mechanisms underlying metabolic reprogramming in cancer cells and discuss how these metabolic alterations contribute to the establishment of an immunosuppressive microenvironment. We also explore potential therapeutic strategies targeting metabolic vulnerabilities in cancer cells to enhance immune-mediated anti-tumour responses.
Kawasaki Disease with Profound Vascular Involvements: An Insightful Pediatric Case
Naila Nadeem
Muhammad Nadeem Ahmad

Naila Nadeem

and 7 more

August 27, 2024
1 INTRODUCTIONKawasaki Disease (KD) is a rare entity but one of the most common pediatric vasculitis. It predominantly affects the pediatric population, generally before the age of 5 years with coronary artery aneurysms being the most feared complication; however, due to the broader disease spectrum, patients can present with diverse clinical presentations [1]. Coronary aneurysms generally develop after two weeks of disease onset in about 25% of cases [2]. The standard treatment includes IV immunoglobulin and aspirin [3]. There are no specific laboratory markers and the diagnosis is mainly based on a set of clinical criteria, featuring prolonged fever, polymorphous rash, conjunctivitis, mucosal changes, lymphadenopathy, and extremity changes [4]. Systemic arterial aneurysm formation is a very rare entity, affecting 0.8% to 2% of the cases, approximately 3 months after disease onset [5].
Aortic periannular abscess missed by transthoracic echocardiography: A case report
Wenjuan He
Yudong Peng

Wenjuan He

and 5 more

August 24, 2024
A document by Wenjuan He. Click on the document to view its contents.
A Three-step Interval Estimation Method for Discrete-Time Linear Switched Systems
Zhenhua Wang
Xinyang Liu

Zhenhua Wang

and 3 more

August 27, 2024
This paper proposes a three-step interval estimation method in the framework of optimization for discrete-time switched systems. The proposed method is realized based on observers design via reachability analysis and measurement update. In order to obtain interval estimation, a peak-to-peak index is used to improve the robustness caused by disturbances and noise. The calculation of zonotopes and boxes is used for reachability analysis. A new iterative algorithm is proposed to reduce computational complexity. For improving estimation accuracy, a method of 1-norm optimization is proposed, which can reduce the conservatism of computing intersections.
One case report of US-guided percutaneous microwave ablation treatment for toxic mult...
Zheng LI
Xueting Qiu

Zheng LI

and 3 more

August 26, 2024
One case report of US-guided percutaneous microwave ablation treatment for toxic multinodular goiterLI Zheng, QIU Xueting, JIANG Rong, MA Zhimin11Correspondence:MA Zhimin, Email: mazhimin01@sina.com
Maternal Verbal Co-construction Skills: Associations with Maternal Sensitivity and To...
Muqing Liu
Jill Trumbell

Muqing Liu

and 3 more

August 26, 2024
This study investigated whether organizational characteristics of mothers’ verbalizations (i.e., co-construction skills) when creating attachment-related stories with their children are related to maternal behavioral sensitivity and child behavioral attachment security. Fifty-four 2.5-year-olds and their mothers participated in three visits: lab, home, and playground. Three structural characteristics of maternal verbalizations were assessed during a joint storytelling task in the lab: “creating a co-constructive atmosphere,” “encouraging content elaboration,” and “supporting explanatory frameworks.” Observations of maternal sensitivity and child attachment security were completed both at home and playground; composites of sensitivity and security across contexts were used in analyses. As expected, sensitivity and security were significantly associated. Co-construction skills were significantly associated with maternal sensitivity. Contrary to expectations, co-construction skills were not related to child security. Theoretical and methodological implications are discussed.
Investigation of the Effect of Sustainability Themed Playgrounds in School Gardens on...
Mustafa  BOZKURT
Sibel SÖNMEZ

Mustafa BOZKURT

and 1 more

August 26, 2024
This study aims to reveal the effect of school gardens and garden practices organised within the scope of Sustainable Development Goals on the environmental awareness of 36-66 months old children. The study group of the research consists of 29 children aged 36-66 months attending an independent kindergarten in Tarsus district of Mersin province. In the study, a structured interview form was used as a data collection tool after a detailed review of the literature. In the research, the answers given by the children in the interviews were analysed by content analysis method. As a result of the reliability calculation, the reliability of the study was found to be 96%. As a result, it was determined that the garden practices supported children to have knowledge about waste management, biodiversity, renewable energy and water saving and to develop awareness. In addition, although the data were collected for different age groups, the findings showed that there was no difference between age groups in terms of developing environmental awareness.
Network analysis challenges the functional importance of charismatic and commercial s...
Ruben Olmo-Gilabert
Gustavo De La Cruz-Agüero

Ruben Olmo-Gilabert

and 5 more

August 26, 2024
Recognition of ecosystem-based management for marine life conservation is growing. Understanding key species roles is crucial, yet conservation efforts often prioritize charismatic or commercially valuable species. Here we quantified the topological importance of species with high economic or conservation value by simulating extinction scenarios in the Gulf of California trophic network. We found food web robustness against removals of charismatic or commercially important species while, others without such interests suggest strong roles on food web functioning. Invertebrates such as squids and crustaceans are in crucial intermediate positions, making them key bottlenecks for energy transfers. A mixed ecosystem control is at play in the food web, which is dominated by species controlling the indirect effects in top-down forcing as white sharks and hammerheads and bottom-up forcing imposed by the phytoplankton. Direct effect transmission is regulated by the silky shark due to its diverse diet. Only two charismatic removals, blue whale and white shark affected the closeness centrality patterns, whereas only blue shrimp and Monterrey sardine are commercially important species with functional relevance roles in the food web. In addition, our findings highlight the major structural importance of some non-charismatic species, as loliginid squid and blue shrimp populations, which in turn, impact indirectly on the charismatic species. We hope our network analysis will help decision makers in the development of novel conservation policies.
Simple competition indices and environmental variables do little to improve predictio...
Demissew Gebreyohannes
Jeff Houlahan

Demissew Gebreyohannes

and 1 more

August 26, 2024
The debate about the relative importance of interspecific competition and environmental factors in annual population fluctuations has persisted in ecology for many decades. Ecologists face the challenge of determining the extent to which interspecific competition and environmental factors impact population growth rates. We assess the predictive ability of models with and without interspecific competition and environmental covariates to predict population size one year beyond the model-building data. For 5 of 14 datasets a model with interspecific competition and/or environmental factors make better mean ‘absolute’ prediction error. However, none of the models with interspecific competition and/or environmental variables make predictions that are statistically significantly superior to the random walk model. We conclude that there is limited evidence that incorporating interspecific competition and/or environmental covariates leads to improved model predictive ability.
Numerical Analysis of The Performance of Conventional and Modified Spherical Solar St...
Faiz T. Jodah
Wissam H. Alawee

Faiz T. Jodah

and 3 more

August 26, 2024
Water scarcity is a growing threat due to population growth, urbanization, and climate change. This problem hinders sustainable development, making innovative solutions crucial distillation, which utilizes solar energy to convert brackish or saline water into clean drinking water, is emerging as a promising approach. While various solar designs exist, identifying the most efficient and cost-effective option for residential and industrial applications remains a challenge. This paper presents a comparative analysis, focusing on practical, between the traditional spherical solar still and an improved design incorporating a fan. We conducted our research in Baghdad, Iraq in June, utilizing real-world temperature and solar radiation data from the Iraqi Meteorological and Seismic Monitoring Authority. The key finding is that the inclusion of a fan within the solar system still significantly increases production efficiency by 31.8% compared to the conventional design. Furthermore, this study contributes valuable numerical simulations, empowering researchers to design efficient and low-cost solar stills. This technology holds particular promise for regions struggling with polluted water, especially in southern Iraq.
The Potential Capacities of FTY720: Novel Therapeutic Functions, Targets, and Mechani...
Juan Liu
Lu Zhang

Juan Liu

and 5 more

August 26, 2024
As an antagonist of sphingosine-1-phosphate (S1P), FTY720 works by binding to S1P receptors (S1PRs) other than S1PR2 and was granted permission for multiple sclerosis by the Food and Drug Administration (FDA) in 2010. As the first non-selective oral agonist for S1PRs, the diversity and systemic expression of FTY720 receptors often cause alterations in various signaling pathways and multi-systems, making FTY720 a hot drug in current research. Recent studies have identified FTY720 has a wide range of novel or potential functions beyond targeting multiple sclerosis, involving studies ranging from the blood-brain barrier (BBB), the vascular system, organelles, cell death, and synaptic transmission, to organ transplantation diseases, immune disorders, oncological disorders, neurological and psychiatric disorders, virus infection, and more. Based on these studies, this paper reviews the novel roles, targets, and mechanisms of FTY720 that have the potential for clinical utility. In addition, this review summarises the FTY720 derivation and development process, clinical safety, future dilemmas, and coping strategies. Collecting these summaries and insights greatly enriches our comprehension and appreciation of FTY720’s profound clinical potential and therapeutic applicability.
Advancements in Plant Gene Editing Technology: From Construct Design to Enhanced Tran...
Pu Yuan
Muhammad Usman

Pu Yuan

and 6 more

August 26, 2024
Plant gene editing technology has significantly advanced in recent years, thereby transforming both biotechnological research and agricultural practices. This review provides a comprehensive summary of recent advancements in this rapidly evolving field, showcasing significant discoveries from improved transformation efficiency to advanced construct design. The primary focus is on the maturation of the CRISPR-Cas9 system, which has emerged as a powerful tool for precise gene editing in plants. Through a detailed exploration, we elucidate the intricacies of integrating genetic modifications into plant genomes, shedding light on transport mechanisms, transformation techniques, and optimization strategies specific to CRISPR constructs. Furthermore, we explore the initiatives aimed at extending the frontiers of gene editing to non-model plant species, showcasing the growing scope of this technology. Overall, this comprehensive review highlights the significant impact of recent advancements in plant gene editing, illuminating its transformative potential in driving agricultural innovation and biotechnological progress.
The Silver Lining in BET Protein Targeting for Advanced Prostate Cancer Pharmacothera...
Oluwole Akawa
Felix Okunlola

Oluwole Akawa

and 5 more

August 26, 2024
Despite advances made over the years in the pharmacotherapy of prostate cancer, progression to the advanced phenotypes which ultimately account for the high rate of mortality in patients continue to pose a significant challenge to clinical management and outcomes. Recent integrative strategies geared towards the identification of beneficial molecules have identified the role of epigenetics and in turn BET proteins in the disease progression. In this review, we explored the role of BET protein paralogs in prostate tumorigenesis and proceeded to probe pharmacotherapeutic targeting of BET proteins using small molecule inhibitors with emphasis on computational techniques employed. Finally, we explored the relevance of various computational techniques to uniquely classify bromodomain-containing protein–targeted molecules with efficacy in advanced prostate cancer. Our opinion is that many small molecule inhibitors of BET proteins have been identified with some making it to clinical trials, albeit unsuccessfully. Although several computer-aided drug design (CADD) techniques have been employed, the continuous integration of CADD will only serve to improve on efforts already made towards the design of efficacious, potent, and highly selective novel BET inhibitors as witnessed recently in the suppression of treatment-emergent neuroendocrine prostate cancer (NEPC) by BRD4 inhibitors.
Registry-based surveillance of severe acute respiratory infections in Norway during 2...
Elina Seppälä
Håkon Bøås

Elina Seppälä

and 8 more

August 26, 2024
Background In 2021, the Norwegian Institute of Public Health established temporary registry-based surveillance of severe acute respiratory infections (SARI). We aimed to describe the surveillance system and evaluate selected attributes to inform the establishment of a permanent SARI surveillance system. Methods SARI cases were defined using ICD-10 discharge codes from national health and administrative registries, including codes for acute upper or lower respiratory infection (URI, LRI), COVID-19, acute respiratory distress syndrome, pertussis, or otitis media. Data from polymerase chain reaction (PCR) analyses were available for 10 respiratory pathogens including SARS-CoV-2, influenza virus, and respiratory syncytial virus (RSV). We included data from 28.9.2020–31.3.2024 and calculated the following parameters: the proportion of cases tested for SARS-CoV-2, influenza virus and/or RSV; time between admission and registration of a SARI-related ICD-10 code; and proportion of cases with URI, LRI and COVID-19. Results We identified 214,730 SARI cases, of whom 82%, 73% and 53% were tested for SARS-CoV-2, influenza virus and RSV. Case peaks were predominantly driven by one or a combination of these pathogens. Median time between admission and a registered SARI diagnostic code was 5 (lower-upper quartile 3-10) days. Nowcasting and alternative case definitions for SARI with COVID-19, -influenza, and RSV improved the timeliness. The ICD-10 codes for LRIs and COVID-19 captured only ~55% of the cases in the age group 0-29 years compared to the routine case definition, where URIs were included. Conclusions Registry-based SARI surveillance provides timely data for handling epidemics of respiratory infections in Norway. We recommend establishing a permanent SARI surveillance system.
Alternative stable states and ecological restoration: Facts, theory, and perspectives
Wanxiao Sha
Jiayi Xu

Wanxiao Sha

and 7 more

August 26, 2024
Alternative stable states refer to two or more stable states in an ecosystem under the same external conditions. Ecosystems with alternative stable states respond to external conditions changes nonlinearly and hysteretic, with forward and backward regime shifts occurring at different environmental levels (thresholds). The region between the two thresholds is unstable, and the eventual ecosystems state depends on the initial conditions. Alternative stable states mainly result from positive feedback generated by various biotic-biotic and biotic-abiotic interactions in the ecosystem. For degraded ecosystems with alternative stable state, the recovery trajectory is not the same as the collapse, and feedback makes it more difficult to restoration. In the context of global change, it is expected that the frequency of catastrophic regime shifts and alternative stable states under climate change and human disturbance may increase. Therefore, incorporating the frameworks of ASS into restoration practices, and understanding when, how, and why to apply them is increasingly important. Here, we summarized the alternative stable states in the different ecosystems, the field and theoretical work in generating, diagnosing, and evaluating alternative stable states. It is generally believed that hysteresis, threshold, and positive feedback are important characteristics of alternative stable states. When putting the alternative stable states framework into restoration, correctly identifying the recovery threshold is still needed. On this basis, disrupting the feedback reinforcing the degraded state or strengthening the restoration feedback artificially to restore the ecosystem to the ideal state is a direction that restoration ecology should make efforts.
Do non-clinical services help to improve functional outcomes among young adults with...
Kate Gossip
Julie John

Kate Gossip

and 5 more

August 26, 2024
Title Do non-clinical services help to improve functional outcomes among young adults with mental disorders? A systematic review. Aim This systematic review aims to examine and synthesise the evidence for non-clinical services on improving functional outcomes for young adults with mental disorders. Methods The systematic review was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Results Only 17 studies met the inclusion criteria. Nine studies were focussed on vocational support services and seven of these examined the impact of the well-established Individual Placement and Support model. Most studies reported increased rates of employment of young adults similar to studies in general adult populations. Six studies reported on lifestyle interventions including a combination of physical activities, nutrition education, health coaching and motivation and behaviour change. The measures of functioning used by the studies were too varied to determine whether lifestyle interventions may be useful in improving functional outcomes for young adults. There were only two studies on family and network support services for young adults. Conclusion Given the importance of improving functional outcomes among young adults with mental disorders to improve daily activities, quality of life and recude future disability, further research is needed to understand the impact of non-clinical services on functioning. This evidence will provide pragmatic guidance for service planners to invest in supports and interventions that make a meaningful difference to the lives of young adults living with mental illness.
A First-in-human phase I study of an innovative selective inhibitor targeting coagula...
Qian Xiang
Zhiyan Liu

Qian Xiang

and 11 more

August 26, 2024
Aim: Coagulation factor XI (FXI) plays a crucial role in the intrinsic coagulation pathway, and inhibitors targeting it may mitigate the risk of hemorrhage compared to anticoagulants currently on the market. SKB336, a novel selective inhibitor of FXI/FXIa, has been shown to prolong the activated partial thromboplastin time (APTT) in in-vitro and in-vivo studies. This study aimed to determine the safety, tolerability, pharmacokinetics, and pharmacodynamics of SKB336 in healthy subjects. Methods: In this randomized, single-blinded, placebo-controlled, and dose-escalation phase I study, 60 healthy subjects were allocated to six cohorts (0.1 mg/kg, 0.3 mg/kg, 0.6 mg/kg, 1.25 mg/kg, 2.5 mg/kg, and 4 mg/kg) and received SKB336 injection or placebo in a 4:1 ratio. The safety, tolerability, pharmacokinetics, and immunogenicity were measured up to 85 days post-dose. Exploratory analysis consisted of FXI activity and APTT. Results: SKB336 was well tolerated in all six cohorts, without any hemorrhagic events, reported deaths, or serious adverse events. No significant dose-dependent correlation was observed with the incidence of adverse events. Dose-dependent increases in the Cmax and AUC were observed. The mean t1/2 was 21.3–33.5 days, indicating a potential monthly dosing frequency. The maximum inhibition rate of FXI activity for all six cohorts reached 0, 17%, 28%, 48%, 54%, and 59%, respectively. The maximum APTT ratio to baseline reached 1.09-, 1.26-, 1.47-, 1.77, 1.91-, and 2.00-fold, respectively. Conclusion: SKB336 was generally tolerated, without any bleeding events in healthy volunteers. Besides, SKB336 presented a persistent dose-dependent prolongation of APTT and duration of FXI inhibition.
Mendelian randomization analyses identify bidirectional causal relationships of 16 ps...
kun Zhang
bo Hou

kun Zhang

and 6 more

August 26, 2024
Background: Previous studies have reported a correlation between some psychiatric disorders and the risk of tinnitus, and there has been much interest in their association. This study employed bidirectional two-sample Mendelian randomization (MR) to investigate the genetic causal relationship between 16 psychiatric disorders and tinnitus. Methods: Independent genetic variants associated with 16 psychiatric disorders and tinnitus were obtained from large genome-wide association studies (GWAS) on European populations. In the MR analysis, inverse-variance weighted (IVW), MR-Egger regression and weighted median estimator (WME) methods were used to estimate the bidirectional causality. In addition, heterogeneity and various sensitivity analyses were performed to verify the validity of the IVs to ensure the robustness. Results: The results of the IVW analysis showed a significant association between depressive disorder and the risk of tinnitus (OR = 1.216, 95% CI = 1.033-1.430, P = 0.019), confirming the possibility of an increased risk of tinnitus due to depressive disorder. Additionally, our study revealed a correlation between insomnia (OR = 2.341, 95% CI = 1.334-4.108, p = 0.003), migraine (OR = 1.095, 95% CI = 1.026-1.168, p = 0.006), neuroticism (OR = 1.457, 95% CI = 1.028-2.067, p = 0.035) and tinnitus based on the IVW approach. In addition, the results of reverse MR analysis showed no significant causal relationships between tinnitus and insomnia, migraine, or neuroticism (P > 0.05), ruling out the possibility of reverse causality. Conclusions: This MR method analysis provides new evidence that psychiatric disorders may be positively associated with tinnitus risk. These results may have important implications for public health policy and clinical practice. Future studies will help to elucidate the biological mechanisms and potential confounders of these associations.
For You Are With Me: The Impact of Religious Coping Styles on Mental Health Symptoms...
Elijah P. Mudryk
Aaron Lee

Elijah P. Mudryk

and 3 more

August 26, 2024
Objective: Despite compounding systems of structural oppression contributing to a lower quality of mental health among African Americans, research indicates this population is experiencing limited benefits from mental health services. Culturally competent treatment stands to benefit from going beyond “skin-deep” conceptualizations of African American patients by exploring how positive and negative religious coping styles impact clinical symptomatology given that religion/spirituality is a historical part of the African American cultural identity. Methods: This topic was explored in the present study through a sample of African Americans ( n = 289) gathered through Prolific. Results: The main hypothesis was confirmed as positive religious coping predicted decreased symptoms of depression, anxiety, and stress while negative religious coping was tied to increased severity of these symptoms. Further t-tests found that positive religious coping was higher among females and married individuals. Age also predicted higher levels of positive religious coping and less use of negative religious coping. Conclusion: These findings emphasize how African Americans are not a one-dimensional population and have nuanced identities with different coping styles that are tied to distinct mental health symptoms. Cultural competence is a professional standard among clinical psychologists and the conceptualization of diverse populations stands to benefit from a more contextual understanding of African American identities to help improve treatment effectiveness.
Structural determination of a new non-canonical inhibition complex between porcine tr...
Alexis Campuzano-González
Paloma Gil-Rodríguez

Alexis Campuzano-González

and 5 more

August 26, 2024
The Kunitz-Soybean Trypsin Inhibitor (Kunitz-STI) family is a protein family found in different plants. Several of its members have been experimentally described as inhibitors of different classes of proteases from several organisms. Even though most of the previous crystallographic studies describing the protease inhibition interactions present by different Kunitz-STI family members have been focused on serine proteases, the protein family has been proposed as a promising scaffold for future multifunctional protease inhibitor with a probable wide range of applications. In this work, a new crystallographic complex formed between M271, a Kunitz-STI obtained from Solanum tuberosum, and porcine trypsin shows a new inhibitory interface in which M271 loops β1-β2 and β3-β4 play a central role. Additionally, the structural analysis demonstrates that the inhibition described here follows a non-canonical mechanism in which M271 loops β1-β2 and β3-β4 block the porcine trypsin active site. Our findings expand the molecular repertoire in which a Kunitz-STI can inhibit trypsin, stressing the role of the dynamical characteristics of the Kunitz-STI family members on the protein inhibition process. This work also gives a new example of the remarkable plasticity of the Kunitz-STI fold, in which an arrangement with eleven highly sequence-variable loops projected to the solvent demonstrates a simple answer for a multifunctional evolutionary tool to inhibit proteases.
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