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1.
Intervirology ; 67(1): 40-54, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38432215

RESUMO

BACKGROUND: The world has witnessed one of the largest pandemics, dubbed severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). As of December 2020, the USA alone reported 98,948 cases of coronavirus disease 2019 (COVID-19) infection during pregnancy, with 109 related maternal deaths. Current evidence suggests that unvaccinated pregnant women infected with SARS-CoV-2 are at a higher risk of experiencing complications related to COVID-19 compared to nonpregnant women. This review aimed to provide healthcare workers and non-healthcare workers with a comprehensive overview of the available information regarding the efficacy of vaccines in pregnant women. SUMMARY: We performed a systematic review and meta-analysis following PRISMA guidelines. The search through the database for articles published between December 2019 and October 2021 was performed. A comprehensive search was performed in PubMed, Scopus, and EMBASE databases for research publications published between December 2019 and October 2021. We focused on original research, case reports, case series, and vaccination side effect by authoritative health institutions. Phrases used for the Medical Subject Heading [MeSH] search included ("COVID-19" [MeSH]) or ("Vaccine" [MeSH]) and ("mRNA" [MeSH]) and ("Pregnant" [MeSH]). Eleven studies were selected and included, with a total of 46,264 pregnancies that were vaccinated with mRNA-containing lipid nanoparticle vaccine from Pfizer/BioNTech and Moderna during pregnancy. There were no randomized trials, and all studies were observational (prospective, retrospective, and cross-sectional). The mean maternal age was 32.2 years, and 98.7% of pregnant women received the Pfizer COVID-19 vaccination. The local and systemic adverse effects of the vaccination in pregnant women were analyzed and reported. The local adverse effects of the vaccination (at least 1 dose) such as local pain, swelling, and redness were reported in 32%, 5%, and 1%, respectively. The systemic adverse effects such as fatigue, headaches, new onset or worsening of muscle pain, chills, fever, and joint pains were also reported in 25%, 19%, 18%, 12%, 11%, and 8%, respectively. The average birthweight was 3,452 g. Among these pregnancies, 0.03% were stillbirth and 3.68% preterm (<37 weeks) births. KEY MESSAGES: The systemic side effect profile after administering the COVID-19 mRNA vaccine to pregnant women was similar to that in nonpregnant women. Maternal and fetal morbidity and mortality were lowered with the administration of either one or both the doses of the mRNA COVID-19 vaccination.


Assuntos
Vacinas contra COVID-19 , COVID-19 , Complicações Infecciosas na Gravidez , SARS-CoV-2 , Humanos , Gravidez , Feminino , Vacinas contra COVID-19/efeitos adversos , Vacinas contra COVID-19/administração & dosagem , Vacinas contra COVID-19/imunologia , COVID-19/prevenção & controle , Complicações Infecciosas na Gravidez/prevenção & controle , Complicações Infecciosas na Gravidez/virologia , SARS-CoV-2/imunologia , Vacinas de mRNA , Eficácia de Vacinas
2.
Org Biomol Chem ; 22(36): 7395-7410, 2024 09 18.
Artigo em Inglês | MEDLINE | ID: mdl-39177253

RESUMO

A simple and direct synthesis of 2,6-diiodophenylethanol building blocks through highly regioselective metalation (MIE)/oxirane SN2-type ring opening of 1,2,3-triiodobenzene is described. A significant impact of the nature of the R1 group on the reactivity of the reaction was discovered but not in terms of site-selectivity. The MIE quenching step is easily controlled by the use of slow-reacting electrophiles "oxiranes" providing solely the ortho-diiodinated homobenzylic alcohol derivatives (internal products) in excellent site-selectivity and with stereoretention. The reaction proceeded without any additives to activate the oxiranes and tolerated a wide range of substrates. The reaction of electron-deficient 1,2,3-triiodoarene systems and neutral oxiranes under the optimized conditions provided the highest isolated yields. The reaction is facile, scalable, efficient, general in scope, and generates handy precursors for further chemical manipulation. In silico interaction analysis revealed that compounds 7a, 7p, 7t and 7z established favourable interactions with the receptors IDO and TDO. Moreover, the molecular simulation results revealed stable dynamics, minimal internal fluctuations, tighter packing and more favourable dynamic features. Furthermore, the 7a-IDO reported a TBE of -26.22 ± 0.24 kcal mol-1, 7t-TDO reported a TBE of -46.66 ± 0.27 kcal mol-1, 7p-TDO reported a TBE of -48.02 ± 0.29 kcal mol-1 while 7z-TDO reported a TBE of -48.51 ± 0.28 kcal mol-1. This shows that these compounds potentially interact with IDO and TDO and consequently cause the inhibition of these targets. Moreover, the BFE results also revealed that this combination suggests that the gas-phase interactions between the components are favorable, but the solvation of the system is unfavorable. In the context of binding, it further means that the protein and ligand have attractive forces when in close proximity as seen in the gas phase, but when solvated, the system experiences an increase in free energy due to interactions with the solvent. This further implies that the binding might be enthalpically favorable due to favorable gas-phase interactions but entropically unfavorable due to unfavorable solvation effects. Our analysis shows that our designed compounds have unmatched pharmacological potential, far surpassing previously reported compounds. This highlights the innovative nature of these derivatives and sets a new benchmark in IDO and TDO drug discovery, indicating their significant potential as effective anticancer inhibitors.


Assuntos
Antineoplásicos , Indolamina-Pirrol 2,3,-Dioxigenase , Antineoplásicos/farmacologia , Antineoplásicos/síntese química , Antineoplásicos/química , Indolamina-Pirrol 2,3,-Dioxigenase/antagonistas & inibidores , Indolamina-Pirrol 2,3,-Dioxigenase/metabolismo , Humanos , Inibidores Enzimáticos/síntese química , Inibidores Enzimáticos/química , Inibidores Enzimáticos/farmacologia , Estereoisomerismo , Simulação de Acoplamento Molecular , Estrutura Molecular , Relação Estrutura-Atividade
3.
Rev Med Virol ; 33(1): e2395, 2023 01.
Artigo em Inglês | MEDLINE | ID: mdl-36056748

RESUMO

There is overwhelming evidence to suggest that male gender is at a higher risk of developing more severe Covid-19 disease and thus having poorer clinical outcomes. However, the relationship between testosterone (T) and Covid-19 remains unclear with both protective and deleterious effects on different aspects of the disease suggested. Here, we review the current epidemiological and biological evidence on the role of testosterone in the process of SARS-CoV-2 infection and in mediating Covid-19 severity, its potential to serve as a biomarker for risk stratification and discuss the possibility of T supplementation as a treatment or preventative therapy for Covid-19.


Assuntos
COVID-19 , Masculino , Humanos , SARS-CoV-2 , Testosterona/uso terapêutico
4.
Mar Drugs ; 22(5)2024 Apr 30.
Artigo em Inglês | MEDLINE | ID: mdl-38786598

RESUMO

This paper aims to provide an in-depth review of the specific outcomes associated with omega-3 polyunsaturated fatty acids (PUFAs), focusing on their purported effects on post-surgical complications in trauma patients. A comprehensive investigation of omega-3 polyunsaturated fatty acids was conducted until February 2023 using the PubMed database. Surgical trauma is characterized by a disruption in immune response post surgery, known to induce systemic inflammation. Omega-3 PUFAs are believed to offer potential improvements in multiple post-surgical complications because of their anti-inflammatory and antioxidant properties. Inconsistent findings have emerged in the context of cardiac surgeries, with the route of administration playing a mediating role in these outcomes. The effects of omega-3 PUFAs on post-operative atrial fibrillation have exhibited variability across various studies. Omega-3 PUFAs have demonstrated positive effects in liver surgery outcomes and in patients with acute respiratory distress syndrome. Omega-3 is suggested to offer potential benefits, particularly in the perioperative care of patients undergoing traumatic procedures. Incorporating omega-3 in such cases is hypothesized to contribute to a reduction in certain surgical outcomes, such as hospitalization duration and length of stay in the intensive care unit. Therefore, comprehensive assessments of adverse effects can aid in identifying the presence of subtle or inconspicuous side effects associated with omega-3.


Assuntos
Ácidos Docosa-Hexaenoicos , Ácido Eicosapentaenoico , Ácidos Graxos Ômega-3 , Complicações Pós-Operatórias , Humanos , Complicações Pós-Operatórias/prevenção & controle , Ácido Eicosapentaenoico/farmacologia , Ácido Eicosapentaenoico/uso terapêutico , Ácido Eicosapentaenoico/administração & dosagem , Ácidos Docosa-Hexaenoicos/farmacologia , Ácidos Docosa-Hexaenoicos/administração & dosagem , Ácidos Graxos Ômega-3/farmacologia , Ácidos Graxos Ômega-3/uso terapêutico , Ferimentos e Lesões/cirurgia , Animais
5.
Surgeon ; 22(5): 307-318, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39107173

RESUMO

BACKGROUND: In the Arab region, there's a dearth of research on female surgeons' experiences and challenges. To address this gap, a scoping review aims to map existing literature. It seeks to understand the hurdles faced by female surgeons in Arab countries and examine any gender biases in public preferences for surgeons. No previous reviews were conducted on female surgeons in the Arab region. By identifying systemic barriers, the review aims to promote inclusivity and support for female surgeons in the Arab medical community. METHODS: A scoping review was performed and reported using the PRISMA extension for scoping reviews. Five databases were searched which include PubMed, Web of Science, Scopus, Embase, and ProQuest. The search strategy included three main strings that are "Women" AND "Surgeons" AND "Arab Country". A priori-identified spreadsheet was used for data extraction. RESULTS: A total number of 23 studies were included in this review. The findings were categorized under several headings, such as the general public's preferred gender of surgeon and well-being, challenges, and experiences of female surgeons as well as career perspectives, choices, and satisfaction. CONCLUSIONS: This scoping review explores experiences and challenges faced by female surgeons in the Arab region, emphasizing the need to address systemic barriers and promote inclusivity.


Assuntos
Médicas , Cirurgiões , Humanos , Feminino , Árabes , Escolha da Profissão , Sexismo , Oriente Médio , Satisfação no Emprego
6.
Int J Mol Sci ; 25(9)2024 Apr 30.
Artigo em Inglês | MEDLINE | ID: mdl-38732113

RESUMO

Post-traumatic stress disorder (PTSD) is a debilitating psychological condition that may develop in certain individuals following exposure to life-threatening or traumatic events. Distressing symptoms, including flashbacks, are characterized by disrupted stress responses, fear, anxiety, avoidance tendencies, and disturbances in sleep patterns. The enduring effects of PTSD can profoundly impact personal and familial relationships, as well as social, medical, and financial stability. The prevalence of PTSD varies among different populations and is influenced by the nature of the traumatic event. Recently, zebrafish have emerged as a valuable model organism in studying various conditions and disorders. Zebrafish display robust behavioral patterns that can be effectively quantified using advanced video-tracking tools. Due to their relatively simple nervous system compared to humans, zebrafish are particularly well suited for behavioral investigations. These unique characteristics make zebrafish an appealing model for exploring the underlying molecular and genetic mechanisms that govern behavior, thus offering a powerful comparative platform for gaining deeper insights into PTSD. This review article aims to provide updates on the pathophysiology of PTSD and the genetic responses associated with psychological stress. Additionally, it highlights the significance of zebrafish behavior as a valuable tool for comprehending PTSD better. By leveraging zebrafish as a model organism, researchers can potentially uncover novel therapeutic interventions for the treatment of PTSD and contribute to a more comprehensive understanding of this complex condition.


Assuntos
Modelos Animais de Doenças , Transtornos de Estresse Pós-Traumáticos , Peixe-Zebra , Animais , Humanos , Comportamento Animal , Estresse Psicológico
7.
Aging Male ; 26(1): 2220567, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37287273

RESUMO

Functional hypogonadism is a condition characterized by low testosterone concentrations, occurring more commonly in men as they age. The International Prostate Symptom Score (IPSS) is used to categorize the severity of lower urinary tract symptoms (LUTS) and related symptoms in hypogonadal men. Testosterone therapy (TTh) has previously shown potential in improving total IPSS in men with hypogonadism. However, concerns regarding the effects of urinary function following TTh often prevent treatment in hypogonadal men. To explore this further, two population-based single-center, prospective, cumulative registry studies were combined to contribute to a total population of 1176 men with symptoms of hypogonadism. The total population was separated into a TTh group receiving testosterone undecanoate (TU) for up to 12 years and a control group that did not receive treatment. IPSS was recorded at both baseline and at final recorded visit for each patient. Long-term TTh with TU in hypogonadal men resulted in significant improvements in IPSS categories, even in patients with severe symptoms at baseline. In the control group, untreated hypogonadal men experienced a worsening of IPSS categories. These data indicate that TTh improves LUTS in men with hypogonadism and suggest that previous concerns regarding urinary function may have been overstated.


Assuntos
Hipogonadismo , Próstata , Masculino , Humanos , Estudos Prospectivos , Testosterona/uso terapêutico , Hipogonadismo/tratamento farmacológico , Sistema de Registros
8.
J Enzyme Inhib Med Chem ; 38(1): 2220084, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37318308

RESUMO

Boronic acids/esters have recently emerged in the field of medicinal and pharmaceutical research due to their exceptional oxophilicity, low toxicity, and unique structure. They are known as potent enzyme inhibitors, cancer therapy capture agents, and can mimic certain types of antibodies to fight infections. They have been designed and developed into drugs, and this approach has emerged in the last 20 years. Five boronic acid drugs have been approved by the FDA and Health Canada, two of which are used to treat cancer, specifically multiple myeloma. The purpose of this review is to investigate boronic acid/ester derivatives as potential pharmaceutical agents as well as the mechanism of action. It will concentrate on six types of cancer: multiple myeloma, prostate cancer, breast cancer, lung cancer, cervical cancer, and colon cancer. Some newly developed boron-containing compounds have already demonstrated highly promising activities, but further investigation is required before final conclusions can be drawn.


Assuntos
Mieloma Múltiplo , Pró-Fármacos , Humanos , Pró-Fármacos/farmacologia , Pró-Fármacos/química , Ésteres/química , Mieloma Múltiplo/tratamento farmacológico , Ácidos Borônicos/farmacologia , Compostos de Boro/química
9.
Aging Male ; 25(1): 185-191, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35903984

RESUMO

Testosterone therapy (TTh) is the primary treatment for aging men with functional hypogonadism. Whilst the benefits of testosterone (T) replacement are well-evidenced, the long-term data for TTh on metabolic and endocrine parameters is limited. Here we present the effect of TTh on endocrine parameters in hypogonadal men at a 12-year follow-up. In this single-centre, cumulative, prospective, registry study, 321 hypogonadal men (mean age: 58.9 years) received testosterone undecanoate injections in 12-week intervals for up to 12 years. Blood samples were taken at every other visit to measure levels of total T (TT), calculated free T, sex hormone-binding globulin (SHBG), estradiol, luteinizing hormone (LH), follicle-stimulating hormone (FSH), progesterone and prolactin. We observed an increase in TT of 15.5 nmol/L (p < 0.0001), a reduction in SHBG of 10.5 nmol/L (p < 0.0001) and an increase in calculated free T of 383.04 pmol/L (p < 0.0001) over the study period. This was accompanied by an increase in estradiol levels by 14.9 pmol/L (p < 0.0001), and decreases in progesterone (0.2 ng/mL, p < 0.0001), LH (10.4 U/L, p < 0.0001) and FSH (8.4 U/L, p < 0.0001) were demonstrated at 12-years. The levels of prolactin remained unchanged. Long-term TTh altered hormonal parameters to predictably modify the endocrine system. These effects were sustained during the entire observation time of 12 years.


Assuntos
Hipogonadismo , Prolactina , Sistema Endócrino/metabolismo , Estradiol , Hormônio Foliculoestimulante , Humanos , Hipogonadismo/tratamento farmacológico , Hormônio Luteinizante , Masculino , Progesterona , Estudos Prospectivos , Sistema de Registros , Globulina de Ligação a Hormônio Sexual/metabolismo , Testosterona
10.
Aging Male ; 25(1): 234-241, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36066424

RESUMO

Lower urinary tract symptoms (LUTS) are caused by higher tension at the bladder neck level (due to fibrosis or stiffness) or benign prostatic hyperplasia, which causes static obstruction of the bladder outlet. Both forms cause a group of symptoms such as hesitancy, intermittency, weak stream, nocturia, urine frequency, and urgency. Additionally, LUTS (obstructive or irritative symptoms) are common in elderly men with hypogonadism, identified as the reduced testes capability in producing sex steroids and sperm, and are categorized as testosterone deficiency. Even though the mode of action (MoA) of testosterone therapy (TTh) on hypogonadal men needs more researched and understanding, the effectiveness of TTh in the development of male genital organs has been reported in several studies. This review shows the latest updates of TTh in LUTS including potential adverse effects, advantages, and disadvantages.


Assuntos
Sintomas do Trato Urinário Inferior , Hiperplasia Prostática , Idoso , Terapia de Reposição Hormonal , Humanos , Sintomas do Trato Urinário Inferior/etiologia , Masculino , Hiperplasia Prostática/complicações , Sêmen , Testosterona/uso terapêutico
11.
Rev Med Virol ; 31(6): e2223, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-33646622

RESUMO

The current coronavirus disease (COVID-19) pandemic caused by novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has a male bias in severity and mortality. This is consistent with previous coronavirus pandemics such as SARS-CoV and MERS-CoV, and viral infections in general. Here, we discuss the sex-disaggregated epidemiological data for COVID-19 and highlight underlying differences that may explain the sexual dimorphism to help inform risk stratification strategies and therapeutic options.


Assuntos
Imunidade Adaptativa , COVID-19/mortalidade , Imunidade Inata , SARS-CoV-2/patogenicidade , Caracteres Sexuais , Enzima de Conversão de Angiotensina 2/genética , Enzima de Conversão de Angiotensina 2/imunologia , COVID-19/imunologia , COVID-19/patologia , COVID-19/prevenção & controle , Vacinas contra COVID-19/administração & dosagem , Feminino , Expressão Gênica , Hospitalização/estatística & dados numéricos , Humanos , Masculino , Receptores Virais/genética , Receptores Virais/imunologia , SARS-CoV-2/imunologia , Índice de Gravidade de Doença , Fatores Sexuais , Análise de Sobrevida , Internalização do Vírus
12.
Andrologia ; 52(9): e13728, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32583490

RESUMO

CAG trinucleotide repeats are coded for the polyglutamine tract in the N-terminal of the androgen receptor (AR) gene which varies in normal individuals from 6 to 36 residues. In this study, we inspected the impact of the CAG repeats on the spermatogenic defects by measuring the size of AR-CAG repeats length in a cohort of 260infertile and 169 fertile Jordanian men. The infertile group included three subgroups of a zoospermic, oligozoospermic and teratozoospermia men. The CAG allele size was determined by direct sequencing. The results showed a significant association between the length of the AR-CAG repeats and men's infertility (p = .001). In particular, the current cohort demonstrated a significant association between the AR-CAG length polymorphism and oligozoospermia (p < .001) and teratozoospermia (p < .001) but not azoospermia. According to distributions of allele frequency, the risk of oligozoospermia was 5.5-fold greater than normal when alleles frequency > 20 repeats, while the risk of teratozoospermia was > 10.6 folds greater than normal when allele frequency > 22 repeats. In conclusion, our results underscored that the long repeats of the AR-CAG polymorphism within the normal range might be associated with abnormal spermatogenesis such as teratozoospermia and oligozoospermia and contributing to infertility in Jordanian men.


Assuntos
Infertilidade Masculina , Oligospermia , Teratozoospermia , Humanos , Infertilidade Masculina/genética , Jordânia/epidemiologia , Masculino , Oligospermia/genética , Receptores Androgênicos/genética , Repetições de Trinucleotídeos/genética
13.
Mol Divers ; 18(4): 701-19, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25151273

RESUMO

A small library of 30 thiomarinol analogues was successfully synthesised using as a key step-a catalytic enantioselective tandem oxa[4+2] cycloaddition/aldehyde allylboration methodology. With this method, highly substituted α-hydroxyalkyl dihydropyrans were assembled in a single three-component reaction utilizing three different enol ethers and a wide variety of aldehydes, such as aromatic, heteroaromatic, unsaturated and aliphatic aldehydes. In a second operation, a mild and direct method for reducing an acetal unit in the α-hydroxyalkyl dihydropyrans was optimised without the need for protecting a nearby hydroxyl group. This procedure facilitated the synthetic sequence, which was completed by a dihydroxylation of the residual olefin of α-hydroxyalkyl 2H-pyrans to provide the desired library of dihydroxylated pyran analogues reminiscent of the thiomarinol antibiotics. The relative stereochemistry of the resulting library compounds was demonstrated by X-ray crystallography on one of the analogues.


Assuntos
Antibacterianos/química , Mupirocina/análogos & derivados , Piranos/química , Antibacterianos/síntese química , Catálise , Técnicas de Química Sintética , Estrutura Molecular , Mupirocina/síntese química , Mupirocina/química , Piranos/síntese química , Bibliotecas de Moléculas Pequenas
14.
Heliyon ; 10(13): e32822, 2024 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-39035535

RESUMO

Chronic kidney disease (CKD) has been correlated with certain pathological conditions such as cardiovascular diseases and other renal-related dysfunctions. Some other reports suggested an association between CKD and the development of certain solid cancers. Therefore, we aimed to generate this narrative review to present the available literature on the risk of solid cancer development in CKD patient populations. We explored the associations between CKD, organ transplantation, and the development of specific solid organ tumors such as kidney, thyroid, lung, breast, bladder, gastric, and prostate cancers. In conclusion, the previous reports showed an increase in the risk of certain solid cancers such as kidney, lung, bladder, and possibly breast cancer in CKD patients and transplant recipients. On the other hand, thyroid, gastric, and prostate cancers showed unclear association with CKD. Despite the suggested impact of smoking and immunosuppression on the development of cancers in CKD patients, more studies are needed to elucidate the mechanism and the risk factors that might be related to the development of cancer in CKD patients.

15.
Clin Case Rep ; 12(5): e8828, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38736570

RESUMO

Transverse colonic volvulus (TCV) is a serious condition with a mortality rate of up to 33%. It is very rare, especially in children. Despite its rarity, surgeons should have a high index of suspicion and include it in the list of differential diagnoses, especially in patients with developmental delays and associated uncommon syndromes. Resection and anastomosis, whether as a one-stage or two-stage procedure, proved to be the best treatment options for children. Since prompt identification and management are vital, this paper presents useful information on the presentation, treatment, and outcome of this case report.

16.
J Epidemiol Glob Health ; 14(1): 63-71, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38206550

RESUMO

BACKGROUND AND AIM: Breast cancer is the most frequently occurring malignant disease in women and remains the leading cause of cancer-related deaths among females worldwide. The aim of this study is to evaluate the imaging findings of breast cancer in women under the age of 40 and analyze their pathological patterns. METHOD: A retrospective study was conducted from 2013 to 2019, involving 120 patients below 40 years of age with pathologically confirmed primary epithelial breast cancers. The data were collected from the electronic records of a tertiary hospital in Riyadh, Saudi Arabia. Mammograms were performed for 115 patients, ultrasounds were conducted for all patients, and MRI scans were carried out for 47 patients. RESULTS: All radiological findings and clinical characteristics of the 120 cases were retrieved from our digital-based system. The majority of breast cancer patients (83.4%) were between 30 and 40 years old, and the most common clinical presentation was a mass (45.8%). Out of the 73 patients who underwent genetic tests, 32.9% tested positive for gene mutations. No statistically significant correlation was found between specific age groups and breast composition (P = 0.216), specific mammogram abnormalities such as masses (P = 0.262), or microcalcifications (P = 0.421). Ultrasonography was performed for all patients, with abnormalities detected in only one patient who was diagnosed with Paget's disease of the nipple. Masses, with or without parenchymal changes, were the predominant feature in 88.3% of cases. CONCLUSION: The imaging findings in breast cancer cases typically involve masses with suspicious features, irregular shape, and spiculated margins on mammograms, and irregular shape with microlobulated or angular margins on ultrasound. MRI features commonly include masses with irregular shape and heterogeneous enhancement. The luminal B subtype was identified as the most prevalent pathological feature, characterized by a high proliferative index (Ki-67%).


Assuntos
Neoplasias da Mama , Imageamento por Ressonância Magnética , Mamografia , Humanos , Feminino , Neoplasias da Mama/diagnóstico por imagem , Neoplasias da Mama/patologia , Neoplasias da Mama/diagnóstico , Neoplasias da Mama/epidemiologia , Adulto , Estudos Retrospectivos , Arábia Saudita/epidemiologia , Mamografia/métodos , Imageamento por Ressonância Magnética/métodos , Ultrassonografia Mamária/métodos , Adulto Jovem , Estudos de Coortes
17.
J Biomol Struct Dyn ; : 1-13, 2024 Apr 30.
Artigo em Inglês | MEDLINE | ID: mdl-38686915

RESUMO

Leucine is the native known ligand of Sestrin2 (Sesn2) and its interaction with Sesn2 is particularly important, as it influences the activity of mTOR in aging and its associated pathologies. It is important to find out how leucine interacts with Sesn2 and how mutations in the binding pocket of leucine affect the binding of leucine. Therefore, this study was committed to investigating the impact of non-synonymous mutations by incorporating a broad spectrum of simulation techniques, from molecular dynamics to free energy calculations. Our study was designed to model the atomic-scale interactions between leucine and mutant forms of Sesn2. Our results demonstrated that the interaction paradigm for the mutants has been altered thus showing a significant decline in the hydrogen bonding network. Moreover, these mutations compromised the dynamic stability by altering the conformational flexibility, sampling time, and leucine-induced structural constraints that consequently caused variation in the binding and structural stability. Molecular dynamics-based flexibility analysis revealed that the regions 217-339 and 371-380 demonstrated a higher fluctuation. Noteworthy, these regions correspond to a linker (217-339) and a loop (371-380) that cover the leucine binding cavity that is critical for the 'latch' mechanism in the N-terminal, which is essential for leucine binding. Further validation of reduced binding and modified internal motions caused by the mutants was obtained through binding free energy calculations, principal components analysis (PCA), and free energy landscape (FEL) analysis. By unraveling the molecular intricacies of Sesn2-leucine interactions and their mutations, we hope to pave the way for innovative strategies to combat the inevitable tide of aging and its associated diseases.Communicated by Ramaswamy H. Sarma.

18.
J Surg Case Rep ; 2024(8): rjae488, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-39132083

RESUMO

Isolated primary diaphragmatic hydatid disease (HD) occurs in approximately 1% of adult cases. However, this unique presentation of a pediatric diaphragmatic cystic mass has not been previously described in the literature. This study reports a rare case of a 12-year-old girl who was diagnosed with a diaphragmatic hydatid cyst. Surgical exploration via subcostal incision revealed an isolated cyst, free from the thoracic and abdominal viscera. Cystotomy, removal of daughter cysts, and excision of the pericyst cavity were performed, followed by diaphragmatic repair. Histopathological examination confirmed the diagnosis. The postoperative course was uneventful, and the patient completed an 8-week mebendazole regimen with no recurrence at 3 months' follow-up. This paper recommends including HD in the differential diagnosis for pediatric patients presenting with diaphragmatic lesions, particularly in regions endemic for echinococcosis.

19.
Ir J Med Sci ; 193(4): 1827-1835, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38381379

RESUMO

Metformin is the most prescribed oral hypoglycemic drug and is considered by many health practitioners as the first-line treatment for non-insulin-dependent diabetes mellitus (T2DM). It is used either as a monotherapy or adjuvant to other anti-hyperglycemic agents. Most of its side effects are usually mild and self-limiting. However, several studies have shown an association between the use of metformin and low vitamin B12 levels in diabetic patients. The current review aimed to provide a literature review of the current published reports on the association, the possible mechanisms, and the related individualized risk factors that might lead to this incidence. The most accepted mechanism of the effect of metformin on vitamin B12 level is related to the absorption process where metformin antagonism of the calcium cation and interference with the calcium-dependent IF-vitamin B12 complex binding to the ileal cubilin receptor. In addition, many risk factors have been associated with the impact of metformin on vitamin B12 levels in diabetic patients such as dose and duration where longer durations showed a greater prevalence of developing vitamin B12 deficiency. Male patients showed lower levels of vitamin B12 compared to females. Black race showed a lower prevalence of vitamin B12 deficiency in metformin-treated patients. Moreover, chronic diseases including T2DM, hyperlipidemia, coronary artery disease, polycystic ovary disease (PCOD), obesity, and metformin therapy were significantly associated with increased risk of vitamin B12 deficiency.


Assuntos
Diabetes Mellitus Tipo 2 , Hipoglicemiantes , Metformina , Deficiência de Vitamina B 12 , Metformina/uso terapêutico , Metformina/efeitos adversos , Humanos , Deficiência de Vitamina B 12/induzido quimicamente , Deficiência de Vitamina B 12/epidemiologia , Hipoglicemiantes/uso terapêutico , Hipoglicemiantes/efeitos adversos , Diabetes Mellitus Tipo 2/tratamento farmacológico , Diabetes Mellitus Tipo 2/complicações , Fatores de Risco , Masculino , Feminino , Vitamina B 12/uso terapêutico
20.
Clin Case Rep ; 12(1): e8395, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38239756

RESUMO

Key Clinical Message: In an 18-year-old, Meckel's diverticulum and a rare vitellointestinal fibrous band caused bowel obstruction. Clinicians should be vigilant for such anomalies, especially in young adults with virgin abdomens, as potential sources of intestinal obstruction. Abstract: In this case report, we highlight the rarity of vitellointestinal or omphalomesenteric duct anomalies causing intestinal obstruction in the adult population. The patient, an 18-year-old male, presented to the emergency department with a two-day history of abdominal pain and vomiting. Physical examination revealed mild distension of his virgin abdomen with generalized tenderness. Abdominal X-ray displayed dilated small bowel loops, and a computed tomography scan indicated features consistent with closed-loop bowel obstruction. Diagnostic laparoscopy confirmed a vitellointestinal duct remnant as the cause of the small intestinal obstruction, involving a combined Meckel's diverticulum and vitellointestinal fibrous band. In early fetal development, the vitellointestinal duct communicates between the midgut and the yolk sac, expected to disappear during fetal growth. Failure to obliterate can lead to issues such as intestinal blockage, primarily observed in children, making occurrences in adults, as in this case, infrequent with only a few documented instances. Despite its uncommon occurrence in young adults, healthcare providers should consider the vitellointestinal duct anomalous remnant as a potential source of intestinal obstruction, particularly in individuals with a virgin abdomen. Early detection of intestinal obstruction is imperative for patient survival, facilitating prompt management and minimizing the risk of serious morbidities, ultimately contributing to a better patient outcome.

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