Primary Orbital squamous cell carcinoma is an exceedingly rare condition. This is mainly due to absence of native squamous epithelium of the orbit itself. The number of reported cases of orbital squamous cell carcinoma are very few. The presenting signs and symptoms can sometimes be challenging and diagnosis is difficult. We are presenting a case of primary squamous cell carcinoma in a patient with carneys syndrome and the overall scenario and management is elaborated.

Sodium-carbonate-promoted green and facile synthesis of 5-amino-1,2,4-thiadiazoles and 5-amino-1,2,4-selenadiazoles with elemental sulfur and selenium, respectively, was developed. This method was carried out with O2 in the air as the green oxidant, and it has several advantages, including low cost, low toxicity, and stable sulfur and selenium sources, high atom efficiency with water as the sole byproduct, simple operation, and broad substrate scope. Preliminary mechanistic studies indicate that the formation of 1,2,4-thiadiazole ring and 1,2,4-selenadiazole ring undergoes different processes.

A document by Qing-Ling Fu. Click on the document to view its contents.

To investigate the effect of an injectable calcium alginate-amelogenin hydrogel on the polarizability of macrophages and its mechanism of effectively mediating the bone immune microenvironment and improving the osteogenic efficacy of jaw and facial bone defect areas. In this study, we prepared an injectable calcium alginate-amelogenin hydrogel using calcium alginate loaded with amelogenin and investigated its physical properties through cellular experiments. The experimental results showed that the material is injectable, biocompatible, degradable, anti-inflammatory, and promotes osteogenesis. This project provides new ideas for formulating bone tissue regeneration materials and promotes their clinical translation.

Decision-dependent (endogenous) uncertainties (DDUs), as a new type of uncertainties revealed recently, couple dispatch decisions with uncertainty parameters and thus render power system dispatch more challenging. However, most previous works handled various DDUs via stochastic programming (SP) or robust optimization (RO) in a two-stage framework, which undoubtedly introduces the drawbacks of SP and RO, and cannot meet the nonanticipativity requirements in power scheduling. In this paper, we propose a multistage distributionally robust optimization (DRO) method for generation dispatch with demand response (DR) considering the DDUs of deferrable loads and the decision-independent (exogenous) uncertainties (DIUs) of wind power and regular loads. By analyzing the structure of decision-dependency parameters, a novel data-driven decision-dependent ambiguity set is proposed, which provides a generic framework for formulating DDUs and DIUs simultaneously. Then a multistage DRO model with nested max-min structure is developed to integrate the merits of DRO and nonanticipativity into generation dispatch. The proposed model is solved by tailored reformulation method and improved stochastic dual dynamic integer programming (SDDiP). Case studies illustrate the effectiveness of the proposed approach by comparing with the multistage SP, RO, and decision-independent DRO methods.

This paper proposes an approach to evaluate the loading limits of distribution networks due to increasing EV connections. It focuses on two parameters: after-diversity maximum demand (ADMD) and maximum daily energy demand (MDED). Using actual EV charging data from the UK, Monte Carlo simulations generate daily charging profiles, identifying ADMD, MDED, and seasonal variations. ADMD, MDED, and per-hour maximum EV charging demands are combined with UK residential load profiles before EV connection. Their maximum demands are assessed against thermal rating limits, establishing the network’s hosting capacity (HC) for uncontrolled EV charging. To determine the maximum safe number of connected EVs, different scheduling methods for controlled EV charging are compared, considering per-hour maximum demand values, thermal limits, and MDED. This defines the network’s HC for fully controlled EV charging. The approach is demonstrated on the IEEE 33-bus test network. Pre-EV residential demands are obtained from a UK MV substation, and ambient data is collected from a UK Met Office weather station. Results provide a range of network HC values for uncontrolled and controlled EV charging, representing lower and upper limits. These limits correlate with firm and non-firm network HC concepts and guide optimal network upgrades for exceeding these limits.

State estimation is critical for railway power supply systems (RPSSs). Pseudo-measurement is commonly used in state estimation. However, the fluctuations of renewable generations and railway traction loads in RPSS may introduce data noise, which will jeopardize the accuracy of the generated pseudo-measurements and thus impact the state estimation. Additionally, when learning the historical measurement data sequences, the traditional pseudo-measurement model is likely to have overfitting, which will further impact the accuracy of pseudo-measurements, thereby affecting the accuracy of state estimation. To address these issues, this paper proposes a high-accuracy pseudo-measurement-based state estimation approach for RPSSs. Firstly, a denoising autoencoder (DAE)-based method is used to mitigate the impact of data noise on the accuracy of pseudo measurements, and a gated recurrent unit (GRU)-based method is used to adaptively learn the historical measurement data sequence, thereby improving the accuracy of pseudo measurements. Next, the pseudo-measurement weights are obtained by generating pseudo-measurement variances using the Gaussian mixture model. Finally, the pseudo measurements and real-time measurements are integrated by weighted least squares to realize the state estimation of RPSS. The effectiveness and accuracy of the proposed method are verified by simulation on a modified IEEE 33-node system which includes a railway traction substation and renewable generations.

Epigenetic mechanisms are increasingly understood to have major impacts across ecology. However, one molecular epigenetic mechanism, DNA methylation, currently dominates the literature. A second mechanism, histone modification, is likely important to ecologically relevant phenotypes and thus warrants investigation, especially because molecular interplay between methylation and histone acetylation can strongly affect gene expression. There are a limited number of histone acetylation studies on non-model organisms, yet those that exist show that it can impact gene expression and phenotypic plasticity. Wild birds provide an excellent system to investigate histone acetylation, as free-living individuals must rapidly adjust to environmental change. Here, we screen histone acetylation in the house sparrow (Passer domesticus); we studied this species because DNA methylation was important in the spread of this bird globally. This species has one of the broadest geographic distributions in the world, and part of this success is related to the way that it uses methylation to regulate its gene expression. Here, we verify that a commercially available assay that was developed for mammals can be used in house sparrows. We detected high variance in histone acetylation among individuals in both liver and spleen tissue. Further, house sparrows with higher epigenetic potential in the Toll Like Receptor-4 (TLR-4) promoter (i.e., CpG content) had higher histone acetylation in liver. Also, there was a negative correlation between histone acetylation in spleen and TLR-4 expression. In addition to validating a method for measuring histone acetylation in wild songbirds, this study also shows that histone acetylation varies in an ecologically relevant way, adding a new study option for ecological epigenetics.

charge distribution in Asphaltene structures for studying cluster-cluster aggregation in a mixture of Toluene and Dimethyl sulfoxide (DMSO) solvents. DFT calculations, utilizing the polarizable continuum model, have been applied to investigate the charge polarization during the Asphaltene aggregation process in DMSO, a highly polarizable solvent. To explore the self-diffusion coefficient of the colloidal Asphaltene aggregates in DMSO and Toluene solvents, molecular dynamics simulations were performed using the DFT-based potential parametrization in conjunction with the OPLS force field. The potential mean force of the colloidal Asphaltene mixture in DMSO and Toluene solvents was also studied. Furthermore, the density of Asphaltene molecules, as determined by molecular dynamics simulations using the DFT-based potential parametrization, is consistent with available experimental data. The results of the molecular dynamics simulations, employing the DFT potential parametrization, indicate that the size of the Asphaltene nanoclusters in the mixture solvent is approximately 2.7 nm, in agreement with experimental finding

Metamaterials are gaining interest with the emergence of the additive manufacturing technologies. Those implies a capability to perform local mechanical optimizations of the designs, as well as versatile external geometries of the components. The software presented is capable to fill a complex design in a .stl format with a given metamaterial, achieving a graded stiffness. The software developed is also configured to create the final design in different formats to perform a virtual test of the element in a commercial FEM, to edit the design in a CAD software, and to export it in a 3D printable format.

Purpose: The identification of biomarkers for predicting inter-individual sorafenib response variability could allow hepatocellular carcinoma (HCC) patients stratification. SNPs in angiogenesis- and drug absorption, distribution, metabolism, and excretion (ADME)-related genes were evaluated to identify new potential predictive biomarkers of sorafenib response in HCC patients. Methods: Five known SNPs in angiogenesis-related genes, including VEGF-A, VEGF-C, HIF-1a, ANGPT2 and NOS3, were investigated in 34 HCC patients (9 sorafenib responders and 25 non-responders). A subgroup of 23 patients was genotyped for SNPs in ADME genes. A machine learning classifier method was used to discover classification rules for our dataset. Results: We found that only VEGF-A (rs2010963) C allele and CC genotype were significantly associated with sorafenib response. ADME-related gene analysis identified 10 polymorphic variants in ADH1A (rs6811453), ADH6 (rs10008281), SULT1A2/CCDC101 (rs11401), CYP26A1 (rs7905939), DPYD (rs2297595 and rs1801265), FMO2 (rs2020863) and SLC22A14 (rs149738, rs171248 and rs183574) significantly associated with sorafenib response. We have identified a genetic signature of predictive response which could permit non-responder/responder patient stratification. Angiogenesis- and ADME-related genes correlation was confirmed by cumulative genetic risk score and network and pathway enrichment analysis. Conclusions: Our findings provide a proof of concept that need further validation in follow-up studies for HCC patient stratification for sorafenib prescription.

Objectives: to evaluate the effectiveness of treatment options for post-COVID-19 olfactory dysfunction. Design: This is a retrospective cohort study. Setting: …………………………………….. Participants: 120 patients between January 2020 and December 2022 with post-COVID-19 olfactory dysfunction (anosmia or hyposmia). Main outcome measures: Initial smell scores and on weeks 1,2,3,4 of treatment regimens. Results: 43.3% of patients were males and 56.6% were females aged from 18 to 62 years (median age was 38.5 years). 38 patients (36.3%) were hospitalized while 82 patients (68.3%) managed at home. There was a significant difference in the average time for complete recovery in group B was 25.7 ± 9.20 days and group C was 24.8± 6.67 days and group D was 23.5± 7.13 days compared to 28.97 ± 4.29 days in control group A (P = 0.02*). There is no significant association between age, sex, place of management, severity of COVID-19 illness, obesity, and the duration of COVID-19 illness with smell scores and the duration of anosmia/hyposmia but there was a highly significant association with diabetes, hypertension, smoking, and asthma (P-Value=<0.001***). Conclusion: This study suggests that combining the usage of topical mometasone furoate or topical vitamin A or intranasal theophylline with olfactory training shortens the duration of post-COVID- 19 anosmia/hyposmia but offers no superiority regarding smell scores over olfactory training alone after 4 weeks.

Speech-to-text is essential as it converts spoken words to text, thus making it easy to store. It has several components; from a basic model, it is viewed in four stages; Signal pre-processing, feature extraction, feature selection, and modeling. Several works of literature have been documented on improving and achieving better results in speech recognition. However, works remains in resolving the issue of word error rate and accuracy on continuous input stream without increasing the required bandwidth. This research evaluates recurrent neural networks, long short-term memory neural networks, gated recurrent units, and bi-directional long short-term memory. It further tests the signal’s performance after introducing bias to the long short-term memory. This research then proposes a model bi-directional long short-term memory recurrent neural network. Experimental results demonstrate that even with a bias of one on long short-term memory, the bidirectional long short-term memory recurrent neural network model still achieves better results with a word error rate of 8.92%, accuracy of 91.08% and mean edit distance of 0.1910 using the Libri speech training dataset. Future work will evaluate the use of the transformer models in the reduction of the word error rate and accuracy on a continuous input stream.

TITLE PAGEArticle TypeClinical pictureTitlePOUNDing score of Intracranial LipomasAuthorsYuta Aikawa, Takanobu Sato, Ryo IchibayashiAffiliationsDivision of Emergency Medicine Department of Internal Medicine, Toho University Medical Center, Sakura Hospital, Chiba, JapanCorresponding AuthorRyo Ichibayashi, MD, PhDORCID iD https://orcid.org/0000-0002-1273-4875Division of Emergency Medicine Department of Internal MedicineToho University Medical Center, Sakura Hospital564-1 ShimosizuSakura-shi, Chiba 285-8741, JapanPhone: +81-43-462-8811Fax: +81-43-462-8835e-mail: ryou.ichibayashi@med.toho-u.ac.jpRunning titleIntracranial LipomasKeywordsLipomas, Headache, Intracerebroventricular, Diagnostic imagingConflict of interestThe authors have no conflict of interest to disclose.Financial supportThe author(s) received no financial support for this article’s research, authorship, and/or publication.Patient consentWritten informed consent was obtained from the patient to publish this report by the journal’s patient consent policy.Author contributionTS wrote and drafted the manuscript. YA, KI, and RI helped draft the manuscript. All authors read and approved the final manuscript.Data availability statementThe data presented in this study are available on request from the corresponding author. The data are not publicly available due to privacy and ethical considerations.AcknowledgmentsNone.Key clinical messageMost intracranial lipomas are asymptomatic, but headache is the most common symptom. The POUNDing score is sometimes high. Therefore, it is necessary to monitor imaging findings in parallel with the treatment of migraine.Clinical pictureA 29-year-old woman presented to the emergency department with a 2-month-old headache. Her headache was a unilateral throbbing headache like she had never experienced before. Her headache lasted more than 4 hours and was accompanied by vomiting. Otherwise, she had no abnormal neurological findings. She has a history of obsessive-compulsive disorder. She is on regular oral paroxetine hydrochloride and cloxazolam. She gained 30 kg weight in 4 years. So far, she has not seen a doctor because of her headache, although she has acknowledged it many times. She was conscious, had blood pressure 120/80 mmHg, pulse 60/beat, body temperature 35.0°C, pupil 5 mm/5 mm, and bilateral light reflex. No neck stiffness or unconsciousness was noted in her. Her blood tests showed no abnormalities. She underwent a head CT to rule out subarachnoid hemorrhage. Her head CT showed no intracranial hemorrhagic lesions. However, she had bilateral lateral ventricles and low-density structures in the right ventricle. CT values ranged from -20 to -80. When the head CT was set to the condition of the lung field, it was visually confirmed that it was not air (Fig. 1A). As a result, she was diagnosed with an intraventricular lipoma. The POUNDing score was 5 points, suggesting the possibility of migraine.1 After her symptoms improved with analgesics, she was sent home for outpatient follow-up. Intracranial lipoma is a rare benign tumor. Most are located in the midline within the cranium. Lipomas around the corpus callosum are associated with the hypomorphic and amorphic of the corpus callosum. Many cases are asymptomatic, with headache being the most common symptom. It is often found incidentally on head CT. Intracranial lipomas with headaches are found not only in the ventricle but also in other sites.2 At first glance, it can be mistaken for air mixed in the skull. When the CT value is measured, it shows a numerical value from 0 to -100 and is diagnosed as adipose tissue. It is rarely removed by surgery and is observed. The pounding score is a scale for diagnosing migraine. There are no reports of its use for intracranial lipoma. In our case, lipomas were found in the proper and third ventricles, and the right ventricle was more significant than the left (Fig. 1B). Headache due to intracranial lipoma was also considered. Still, from the result of the POUNDing score, it was diagnosed as a headache due to a migraine. Intracranial lipomas that have complained of headaches may include cases of migraine. Therefore, even if the intracranial lipoma is diagnosed, measuring the POUNDing score and differentiating migraine is necessary. On the other hand, the causal relationship between intracranial lipoma and headache has not been elucidated. For this reason, even if symptoms improve with analgesics, follow-up imaging is necessary when ventricular laterality, giant lipoma, and unexplained headache persist.References1. M. Tejero Mas, R. Burgos Blanco, J.J. Aguirre Sánchez, F. Buitrago Ramírez. The mnemonic POUNDing rule in the diagnosis of patients with migraine. Rev Clin Esp . 2018; 218(7): 388-389. doi: 10.1016/j.rce.2018.05.0042. Bilir O, Yavasi O, Ersunan G, Kayayurt K, Durakoglugil T. Incidental Finding in a Headache Patient: Intracranial Lipoma. Western Journal of Emergency Medicine . 2014;15(4):361-2. doi: 10.5811/westjem.2014.4.21298Figure １A・B　Head CTUpper row： A is a lipoma in the right ventricle and B in the third ventricle. （white arrow）Lower row： It can be confirmed that both A and B are not air under lung field conditions. （black circle）

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The pattern of China’s cultivated land has been stable, but there remains a need to improve grain productivity. It is necessary to clarify the background status of cultivated land resources and implement more effective management measures. However, current comprehensive evaluation systems of cultivated land quality do not adequately support the management of cultivated land resources because no national-scale research based on factor restriction exists. Our study analyzed the natural background status and restrictive factors of cultivated land resources in China using data from the third national land survey’s cultivated land resource quality classification. The results showed that 1) The quality of cultivated land resources in China was not high, with medium cultivated land accounting for the majority (57.30%). The factors reflecting the quality of cultivated land were significantly different. The average grade of soil texture was 1.39, and the overall situation was good. Conversely, biodiversity, soil pH value, secondary land types of cultivated land, and crop ripening had average grades of 2.01, 2.06, 2.26, and 2.33, respectively, suggesting relatively poor conditions. 2) There were significant differences in the restrictive factors of cultivated land quality in China. Secondary land types of cultivated land, with a restrictive degree of 1.09, was the only shortcoming factor at the national level. Crop ripening (0.96) and biodiversity (0.87) also contributed to strong restrictions on cultivated land, while soil heavy metal pollution had almost no impact. Different natural regions had different restrictive factors. Crop ripening, secondary land types of cultivated land, and natural region belonged to short-board factors in 31, 24, and 23 natural regions in China, respectively. 3) The regional differences in cultivated land quality in China were significant, and cultivated land resources could be categorized into six management modes. Among them, three eastern regions were mainly to stabilize the existing cultivated land pattern and improve infrastructure construction. The three western regions mainly develop cultivated land resources cautiously and strengthen the ecological protection of cultivated land. The results demonstrated that analyzing the natural background status and its restrictive degree in different regions of cultivated land resources in China based on cultivated land quality factors can clarify the natural background differences of cultivated land resources in China, and provide a basis for classified management of cultivated land resources. This is an important foundation for the protection and utilization of cultivated land resources in the new era.

A document by Rayyan Syed Kamal. Click on the document to view its contents.

The factor that the crystal-structure symmetry in real space can be well inherited in the reciprocal space, leads high-symmetry materials to be top candidates for thermoelectrics due to the possibly resultant high electronic band degeneracy. A general indicator, that can quantitatively describe how crystal structure changes, would help facilitate the advanced thermoelectric material design. For cubic close-packed structures, the spatial environment of the same crystallographic plane family is isotropic, such that the distances between the close-packed layers can be derived from atomic distances within layers. Inspired by this, the relationship between the inter- and intra-layer geometric information can be used for comparing crystal structures with their desired cubic symmetry. The spacing of close-packed layers was found to be an essential indicator for the crystal structure symmetry in Ⅳ-Ⅵ chalcogenides and group I-Ⅴ-VI2 ternary semiconductors, both of which are historically important thermoelectrics. The continuous structure evolution towards high symmetry can be described by the layer spacing when temperature or/and composition change, which is demonstrated by a series of pristine and alloyed thermoelectric materials in this work. The layer spacing based guidance provides a quantitative pathway for manipulating crystal structures to fine tune the electronic band convergence in high-performance thermoelectric materials.

OBJECTIVE: To sonographically characterize the cervical gland area (CGA) and determine if its evaluation at the time of cervical length (CL) screening can be useful for preterm birth (PTB) prediction. DESIGN: Pilot retrospective cohort study. SETTING: Academic medical center (NYU Langone Health Tisch Hospital). POPULATION: Singleton gestations with universal CL screening performed between 18 0/7 – 23 6/7 weeks with subsequent live neonate delivery. METHODS: Transvaginal ultrasound (TVUS) cervical images and clinical data were reviewed, comparing sonographically present and absent CGA groups. MAIN OUTCOME MEASURES: Spontaneous PTB <37 weeks and quantitative CGA measurements. RESULTS: The cohort of 772 patients demonstrated similar characteristics when stratified by absent and present CGA. Rates of PTB and absent CGA were 2.6% and 2.3%, respectively. Absent CGA was significantly associated with delivery <37, <34, and <32 weeks (p<0.001), but gland measurements did not correlate with gestational age at delivery. There was good agreement between reviewers for qualitative CGA (PABAK 0.89). Multiple logistic regression modeling demonstrated better performance of CL screening for PTB prediction with the addition of qualitative CGA evaluation (p<0.001). CONCLUSIONS: Qualitative evaluation of the CGA on mid-gestation TVUS may improve CL screening for PTB. Given the biologic activity of the cervical glands, optimal screening in populations with various risk profiles may warrant a multimodal approach that evaluates the mechanical and biological functions of the cervix.

Objective: To investigate whether intracervical injection of terlipressin during hysteroscopic surgery could reduce the amount of intravasation, the incidence and severity of gas embolism, and the COHb levels in the blood. Design: Randomised double-blind controlled trial. Setting and population: Patients who were scheduled for transcervical resection of type 1 or type 2 myomas (TCR-M), or for extensive transcervical endometrium resection (TCR-E). Methods: Patients were randomised to receive either terlipressin 0.85 mg or placebo injections intracervically at the beginning of the procedure. The amount of intravasation and level of COHb was measured at the end of the procedure. The incidence and severity of gas embolisms was determined during the procedure by transesophageal echocardiography (TEE). Study groups were compared using an Independent Samples T-Test or a Mann-Whitney U test as indicated. Main Outcome Measures: Amount of intravasation, incidence and severity of gas embolisms, blood COHb levels. Results: No significant differences were found in intravasation volume, venous emboli and post-surgery COHb between study groups. There was a trend towards more severe embolisms (grade IV embolisms: 12 versus 6, p = 0.08), paradoxical embolisms (4 versus 2, p = 0.55) and a shorter operation time (mean of 43 versus 36 minutes, p = 0.09) in patients who received terlipressin compared to placebo. Conclusions: This study could not demonstrate a clear beneficial effect of cervical terlipressin administration. However, further research is needed to investigate if terlipressin can reduce operation time, severe embolisms and the need for redo procedures.

Title: Charcot knee mimicking erysipelas A 85-year-old diabetic man presented to the emergency department for a 2-week history of a limb pain associated with right leg edema. Physical examination revealed a temperature of 37.5°C, a marked swelling in the right limb with an erythematous overlying skin. The patient had limitation of both passive and active range of motion of right knee. Laboratory tests showed inflammation (C-reactive protein (CRP) 179 mg/l). Blood cell counts were normal. The diagnosis of erysipelas was made and antibiotic therapy (amoxicillin–clavulanate) was started. Four days later, fever appeared and we noted an increase in the oedema and the CRP was 218mg/l. A leg abscess was suspected. The surgical flattening of the abscess was indicated. Per-operative examination showed a fracture of the fibular head associated with excessive bone loss at the medial plateau of the tibia.X-ray showed destructive femoral condyle and signs of knee subluxation and bone fragmentation (figure 1A). Computer tomography scanning of the right knee confirmed the femorotibial dislocation and the bony fragmentation, with formation of debris seen as intra-articular loose bodies (figure B). Considering these aspects, the most likely diagnosis was Charcot Knee. The patient underwent a trial of conservative treatment and then we suggested a custom-made hinged knee brace for daily use.Neuropathic arthropathy, or Charcot joint is a systemic disease that generates pathological changes in the musculoskeletal system, causing instability, dislocations, and deformities [1]. The literature on CK remains sparse, with most publications being case reports [1]. Diabetes mellitus is the most common etiology and feet and ankles are the most commonly involved joints [2]. Charcot knee is rare, and observed in 6% of patients with diabetes [3], physicians should be aware of this complication. Any patient with peripheral neuropathy, presenting with a red and erythematous knee should be reviewed for CK.

Background: Alzheimer’s disease (AD) is a neurodegenerative disorder characterized by the accumulation of hyperphosphorylated tau (p-tau) in neurofibrillary tangles and beta-amyloid plaques. The role of oxidative stress (OS) in AD progression remains unclear. Methods: Using SH-SY5Y human neuroblastoma cells as an in vitro model, we investigated the impact of OS on tau phosphorylation. Mature neurons were exposed to varying concentrations of hydrogen peroxide for different durations (1-5 days) to simulate OS. Western blot analysis was employed to quantify key signalling pathways (LKB1, AMPK, and Akt) and antioxidant enzymes (SOD2, p1, p4, and catalase). Results: Prolonged OS exposure resulted in tau hyperphosphorylation at Ser262, a tau residue sensitive to AMPK, despite initial dephosphorylation. Treatment with compound C (CC), an AMPK inhibitor, prevented this effect. OS activated LKB1 and AMPK, enhanced by CC and rapamycin, while CC and rapamycin suppressed OS-induced Akt activity. SOD2, the primary defence against OS, increased, whereas p1 and catalase, the secondary defence, decreased. P4 activity remained unchanged. Notably, CC consistently reduced antioxidant enzyme activity across experimental groups. Conclusion: OS activates the LKB1, AMPK, and Akt signalling pathways. The interplay between LKB1’s stimulatory effect and Akt’s inhibitory effect on AMPK leads to AMPK activation and subsequent tau hyperphosphorylation. AMPK facilitates the protective response mediated by SOD2 against OS, but prolonged OS exposure induces tau hyperphosphorylation. Therefore, OS likely serves as a trigger for AD pathology.

Abstract: Objective: To identify differentially expressed proteins in the lymph fluid of rabbits with breast cancer lymphatic metastasis and normal rabbits, and to analyze and verify using proteomics technology. Materials and Methods: Rabbits with breast cancer lymph node metastasis and healthy rabbits were selected. Lymph fluids were precisely extracted under the guidance of percutaneous contrast-enhanced ultrasound (CEUS). Label-free quantitative proteomics (LFQ) was used to detect and compare differences, and differential protein expression was obtained. Bioinformatics analysis was performed using KEGG and GO analysis software, selecting the most significantly differentially expressed proteins. Finally, parallel reaction monitoring technology (PRM) was applied for validation. Results: A total of 547 significantly differentially expressed proteins were found in this study, including 371 upregulated proteins and 176 downregulated proteins. They were mainly involved in various cellular and metabolic pathways, including upregulated proteins such as BLVRA, IDH2, and downregulated proteins such as PDXK. The upregulated proteins PDIA3, PRKAR1A, and ABCC4 participated in immune regulation, endocrine regulation, and anti-tumor drug resistance regulation, respectively. Conclusion: These proteins are involved in the pathophysiological processes of tumor development and metastasis, and can be used as predictive indicators for breast cancer metastasis and as new targets for treatment.

Advances in proteogenomic technologies have revealed hundreds to thousands of translated small open reading frames (sORFs) that encode microproteins in genomes across evolutionary space. While many microproteins have now been shown to play critical roles in biology and human disease, a majority of recently identified microproteins have little or no experimental evidence regarding their functionality. Computational tools have some limitations for analysis of short, poorly conserved microprotein sequences, so additional tools are needed to determine the role of each member of this recently discovered polypeptide class. A currently underexplored avenue in the study of microproteins is structure prediction and determination, which delivers a depth of functional information. In this review, we provide a brief overview of microprotein discovery methods, then examine examples of microprotein structures (and, conversely, intrinsic disorder) that have been experimentally determined using crystallography, cryo-electron microscopy, and NMR, which provide insight into their molecular functions and mechanisms. Additionally, we discuss examples of predicted microprotein structures that have provided insight or context regarding their function. Analysis of microprotein structure at the angstrom level, and confirmation of predicted structures, therefore, has potential to identify translated microproteins that are of biological importance and to provide molecular mechanism for their in vivo roles.