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1.
F S Rep ; 5(3): 312-319, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39381657

RESUMEN

Objective: To assess the counseling experiences of patients with polycystic ovary syndrome (PCOS) related to obstetric complications and preconception management of comorbidities. Design: Cross-sectional survey study. Setting: Not applicable. Patients: Patients with PCOS with a history of or attempt at pregnancy. Interventions: Not applicable. Main Outcome Measures: Demographic characteristics, medical history, and counseling experiences. Results: Of the 302 respondents, 72.9% had a previous pregnancy, with 66.8% reporting complications during pregnancy. Of the entire cohort, 52.7% received preconception counseling on PCOS-related obstetric complications, and 41.5% were satisfied with their counseling experience. Five percent were counseled on related postpartum complications, and 43.4% received counseling about prepregnancy weight management, with the minority satisfied with their counseling. Among the respondents with existing comorbidities including hypertension, diabetes, and anxiety or depression, the minority received counseling on their preconception management. Although there were no racial disparities in the overall counseling of pregnancy complications, more black patients were counseled about preeclampsia, cesarean section, and preterm birth than white patients. Of the patients who had a single provider managing their PCOS care, 78.6% who saw a reproductive endocrinologist, 53.2% who saw a general gynecologist, and 35.0% who saw a primary care physician reported receiving counseling on related pregnancy complications. Conclusions: Despite the high prevalence of obstetric complications associated with PCOS, our study revealed inadequate patient counseling about both the antepartum and postpartum periods and preconception management of existing comorbidities. Our findings highlight the urgent need to increase provider education and patient awareness to optimize maternal and neonatal outcomes.

3.
Diagn Cytopathol ; 52(9): E222-E225, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-38881518

RESUMEN

We report two patients with pancreatic tophaceous gout diagnosed by endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) of presumed cystic mass lesions. The first case involved a patient who had a recent episode of acute pancreatitis 6 months prior, with subsequent imaging concerning for a pseudocyst or mass lesion. The second case involved a patient with epigastric pain associated with a pancreatic head cystic mass and an erroneous original diagnosis of a mucinous pancreatic neoplasm on EUS-FNA. Diff-Quik stained direct smears on fresh material obtained from EUS-FNA of the lesions showed chalky debris with needle shaped negatively birefringent crystals consistent with gout. For the first case, the chalky material was not present on the H&E stained paraffin embedded formalin fixed cellblock slides. The importance of inclusion of cytologic specimen preparations to examine monosodium urate crystals is emphasized.


Asunto(s)
Biopsia por Aspiración con Aguja Fina Guiada por Ultrasonido Endoscópico , Gota , Humanos , Gota/patología , Gota/diagnóstico , Biopsia por Aspiración con Aguja Fina Guiada por Ultrasonido Endoscópico/métodos , Masculino , Persona de Mediana Edad , Anciano , Neoplasias Pancreáticas/patología , Neoplasias Pancreáticas/diagnóstico , Páncreas/patología , Páncreas/diagnóstico por imagen , Femenino , Enfermedades Pancreáticas/patología , Enfermedades Pancreáticas/diagnóstico
4.
Artículo en Inglés | MEDLINE | ID: mdl-38609160

RESUMEN

CONTEXT: Patients with PCOS are at high risk of depression, anxiety, and metabolic syndrome (MetSyn), a key predictor of cardiovascular disease. The impact of depression and/or anxiety on MetSyn is unknown in this population. OBJECTIVE: To compare the risk of developing MetSyn in patients with PCOS with and without a history of depression and/or anxiety. DESIGN: Retrospective longitudinal cohort study (2008-2022) with median follow-up of 7 years. SETTING: Tertiary care ambulatory practice. PATIENTS OR OTHER PARTICIPANTS: Patients with hyperandrogenic PCOS and at least 2 evaluations for MetSyn ≥3 years apart (n=321). INTERVENTION(S): N/A. MAIN OUTCOME MEASURE(S): The primary outcome was risk of developing MetSyn. We hypothesized that this risk would be higher with a history of depression and/or anxiety. RESULTS: At the first visit, 33.0% had a history of depression and/or anxiety, with a third prescribed antidepressants or anxiolytics. Depression and/or anxiety increased risk of developing MetSyn during the study period (adjusted hazard ratio [aHR] 1.45, 95% CI 1.02-2.06, p=0.04) with an incidence of MetSyn of 75.3 compared to 47.6 cases per 100 person-years among those without (p=0.002). This was primarily driven by depression (aHR 1.56, 95% CI 1.10-2.20, p=0.01). CONCLUSIONS: Patients with PCOS and depression and/or anxiety have a high risk of developing MetSyn, with a stronger association between depression and MetSyn. Our findings highlight the urgent need for guideline-directed screening for depression and anxiety at time of diagnosis of PCOS as well as screening at subsequent visits to facilitate risk stratification for metabolic monitoring and early intervention in this high-risk group.

5.
bioRxiv ; 2024 Mar 04.
Artículo en Inglés | MEDLINE | ID: mdl-38496511

RESUMEN

Marginal zone (MZ) B cells bridge innate and adaptive immunity by sensing bloodborne antigens and producing rapid antibody and cytokine responses. CD55 is a membrane-bound complement regulator that interferes with complement activation, an important component of innate immunity. CD55 also regulates adaptive immunity-CD55 downregulation is critical for germinal center reactions. MZ B cells also express low CD55, but its role in MZ B cell function is unknown. Using germline knockout mice, we found that similar numbers of MZ B cells are initially established in 3-week-old CD55-deficient mice compared to wild-type (WT) mice. However, MZ B cells fail to accumulate as mice age and undergo increased apoptosis. Following ex vivo stimulation of MZ B cells through Toll-like receptor 9, we observed a proinflammatory phenotype with increased IL-6 expression. These findings demonstrate a critical role for CD55 in supporting MZ B cell survival while also regulating cellular function.

6.
Fertil Steril ; 121(6): 1010-1019, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38307452

RESUMEN

OBJECTIVE: To derive and internally validate a clinical prediction model for live birth (LB) in women with polycystic ovary syndrome (PCOS) undergoing in vitro fertilization (IVF). DESIGN: Retrospective cohort study. SETTING: Four academic reproductive endocrinology clinics. PATIENTS: A total of 207 women with PCOS confirmed using Rotterdam criteria undergoing their first fresh IVF cycle. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURE: The primary outcome was cumulative LB per IVF cycle start. This included any LB that resulted from either fresh embryo transfer or any subsequent frozen embryo transfer from embryos obtained at the index oocyte retrieval. A prediction model was derived using multivariable logistic regression. Covariates considered for inclusion in the prediction model included demographic characteristics, medical history, and prior fertility treatment. Predicted probabilities for LB were calculated using the prediction model which included the 90% shrinkage factor for each adjusted odds ratio. RESULTS: The final model, on the basis of maximization of the area under the receiver operating characteristic curve, included age < 35 years, White race, presence of polycystic ovaries on ultrasound (polycystic ovary morphology), normal body mass index (<25 kg/m2), being metabolically healthy (no metabolic risk factors), and being a nonresponder to ovulation induction agents including letrozole and clomiphene citrate. The area under the receiver operating characteristic curve score for the model was 0.68 (95% confidence interval [CI]: 0.60, 0.77). Predicted probabilities of LB ranged from 8.1% (95% CI: 2.8, 21.5) for a woman who had no favorable predictors to 74.2% (95% CI: 59.5, 84.9) for a woman who had all favorable predictors. CONCLUSION: Our study demonstrated that, in addition to anovulation, the underlying pathophysiology and associated comorbidities alter the likelihood of a successful pregnancy in women with PCOS undergoing IVF. Further validation of this model is needed before it can serve as a tool to personalize prediction estimates for the probability of LB in women with PCOS.


Asunto(s)
Fertilización In Vitro , Infertilidad Femenina , Nacimiento Vivo , Síndrome del Ovario Poliquístico , Humanos , Femenino , Síndrome del Ovario Poliquístico/diagnóstico , Síndrome del Ovario Poliquístico/terapia , Síndrome del Ovario Poliquístico/fisiopatología , Síndrome del Ovario Poliquístico/epidemiología , Síndrome del Ovario Poliquístico/complicaciones , Fertilización In Vitro/métodos , Adulto , Embarazo , Estudios Retrospectivos , Infertilidad Femenina/terapia , Infertilidad Femenina/diagnóstico , Infertilidad Femenina/fisiopatología , Infertilidad Femenina/epidemiología , Resultado del Tratamiento , Transferencia de Embrión/métodos , Factores de Riesgo , Índice de Embarazo , Medición de Riesgo , Reproducibilidad de los Resultados , Inducción de la Ovulación/métodos , Valor Predictivo de las Pruebas , Técnicas de Apoyo para la Decisión
7.
J Clin Rheumatol ; 30(2): e58-e62, 2024 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-37798827

RESUMEN

OBJECTIVE: To determine the association between disease activity and choroidal thickness in patients with systemic lupus erythematosus (SLE). METHODS: We conducted a cohort study of 24 SLE patients and 13 healthy controls recruited at Washington University School of Medicine between June 2019 and November 2021. SLE disease activity was assessed using the SLE Disease Activity Index-2000 Responder Index-50 (S2K RI-50). Patients were divided into four groups: high disease activity/no lupus nephritis (HDA/no LN; S2K RI-50 > 4), HDA/active LN (HDA/active LN; S2K RI-50 > 4), low disease activity/inactive LN (LDA/inactive LN; S2K RI-50 ≤ 4), and LDA/no LN (LDA/no LN; S2K RI-50 ≤ 4). LDA/no LN patients were age-, sex-, and race-matched to healthy controls and patients in other SLE groups. Choroidal thickness of the right eye was measured blinded to disease activity on a horizontal section through the fovea on optical coherence tomography images taken within a week of disease assessment. RESULTS: Patients with HDA had choroidal thickening compared with matched patients with LDA. After controlling for multiplicity, choroidal thinning remained statistically significant at 1000 µm nasal to the fovea (308 ± 68 vs 228 ± 64 µm, p = 0.001). Choroidal thickness was not different between LDA/no LN and LDA/inactive LN or healthy controls. CONCLUSION: HDA in patient with SLE is associated with increased choroidal thickness whereas comorbid inactive LN did not affect choroidal thickness. Additional studies in a larger longitudinal cohort are needed to study whether choroidal thickness may be used as a noninvasive, adjunctive measure for disease activity in SLE.


Asunto(s)
Lupus Eritematoso Sistémico , Nefritis Lúpica , Humanos , Estudios de Cohortes , Lupus Eritematoso Sistémico/complicaciones , Lupus Eritematoso Sistémico/diagnóstico , Nefritis Lúpica/diagnóstico , Nefritis Lúpica/complicaciones , Tomografía de Coherencia Óptica , Biomarcadores
8.
Nat Commun ; 14(1): 7071, 2023 11 03.
Artículo en Inglés | MEDLINE | ID: mdl-37923771

RESUMEN

Temporal control of protein levels in cells and living animals can be used to improve our understanding of protein function. In addition, control of engineered proteins could be used in therapeutic applications. PRoteolysis-TArgeting Chimeras (PROTACs) have emerged as a small-molecule-driven strategy to achieve rapid, post-translational regulation of protein abundance via recruitment of an E3 ligase to the target protein of interest. Here, we develop several PROTAC molecules by covalently linking the antibiotic trimethoprim (TMP) to pomalidomide, a ligand for the E3 ligase, Cereblon. These molecules induce degradation of proteins of interest (POIs) genetically fused to a small protein domain, E. coli dihydrofolate reductase (eDHFR), the molecular target of TMP. We show that various eDHFR-tagged proteins can be robustly degraded to 95% of maximum expression with PROTAC molecule 7c. Moreover, TMP-based PROTACs minimally affect the expression of immunomodulatory imide drug (IMiD)-sensitive neosubstrates using proteomic and biochemical assays. Finally, we show multiplexed regulation with another known degron-PROTAC pair, as well as reversible protein regulation in a rodent model of metastatic cancer, demonstrating the formidable strength of this system. Altogether, TMP PROTACs are a robust approach for selective and reversible degradation of eDHFR-tagged proteins in vitro and in vivo.


Asunto(s)
Proteínas de Escherichia coli , Tetrahidrofolato Deshidrogenasa , Animales , Tetrahidrofolato Deshidrogenasa/genética , Tetrahidrofolato Deshidrogenasa/metabolismo , Quimera Dirigida a la Proteólisis , Proteínas de Escherichia coli/genética , Proteínas de Escherichia coli/metabolismo , Escherichia coli/genética , Escherichia coli/metabolismo , Trimetoprim/farmacología , Proteómica , Ubiquitina-Proteína Ligasas/metabolismo , Proteolisis
9.
Mol Ther ; 31(12): 3564-3578, 2023 Dec 06.
Artículo en Inglés | MEDLINE | ID: mdl-37919903

RESUMEN

Chimeric antigen receptor (CAR) T cell therapy has been successful for hematological malignancies. Still, a lack of efficacy and potential toxicities have slowed its application for other indications. Furthermore, CAR T cells undergo dynamic expansion and contraction in vivo that cannot be easily predicted or controlled. Therefore, the safety and utility of such therapies could be enhanced by engineered mechanisms that engender reversible control and quantitative monitoring. Here, we use a genetic tag based on the enzyme Escherichia coli dihydrofolate reductase (eDHFR), and derivatives of trimethoprim (TMP) to modulate and monitor CAR expression and T cell activity. We fused eDHFR to the CAR C terminus, allowing regulation with TMP-based proteolysis-targeting chimeric small molecules (PROTACs). Fusion of eDHFR to the CAR does not interfere with cell signaling or its cytotoxic function, and the addition of TMP-based PROTACs results in a reversible and dose-dependent inhibition of CAR activity via the proteosome. We show the regulation of CAR expression in vivo and demonstrate imaging of the cells with TMP radiotracers. In vitro immunogenicity assays using primary human immune cells and overlapping peptide fragments of eDHFR showed no memory immune repertoire for eDHFR. Overall, this translationally-orientied approach allows for temporal monitoring and image-guided control of cell-based therapies.


Asunto(s)
Inmunoterapia Adoptiva , Linfocitos T , Humanos , Inmunoterapia Adoptiva/métodos , Tetrahidrofolato Deshidrogenasa/genética , Tetrahidrofolato Deshidrogenasa/metabolismo , Receptores de Antígenos de Linfocitos T/genética
10.
Diagn Cytopathol ; 51(11): E308-E313, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37533282

RESUMEN

Cytologic diagnosis of neuroendocrine tumors can be straightforward on cytologic preparations, given the classical neuroendocrine morphology and expression of neuroendocrine markers confirmed by immunohistochemistry. However, overreliance on neuroendocrine markers can lead to misdiagnosis even if individual cell features suggest a neuroendocrine tumor. We present three unusual cases, two of which were initially diagnosed as neuroendocrine tumors and the third one carried preliminary diagnosis of neuroendocrine tumor on endoscopic ultrasound-guided fine-needle aspirates. These cases subsequently turned out to be cholangioblastic cholangiocarcinoma, metastatic melanoma, and gastric glomus tumor, respectively. We suggest approaches that could have pointed us towards the correct diagnosis at the outset and discuss potential pitfalls.

11.
Reprod Sci ; 30(12): 3641-3647, 2023 12.
Artículo en Inglés | MEDLINE | ID: mdl-37607986

RESUMEN

Determining early pregnancy location and viability can be cumbersome, often requiring serial evaluations. This study aimed to identify novel biomarker candidates for pregnancy location and viability using a pseudodiscovery high-throughput technique. This was a case-control study among patients presenting for early pregnancy assessment, including ectopic pregnancies, early pregnancy losses, and viable intrauterine pregnancies. For pregnancy location, ectopic pregnancy was considered "case" and non-ectopic considered "control." For pregnancy viability, viable intrauterine pregnancy was considered "case" and early pregnancy loss + ectopic pregnancy were considered "control." Using Proximity Extension Assay technology from Olink Proteomics, serum levels of 1012 proteins were compared separately for pregnancy location and viability. Receiver operator characteristic curves were generated to determine a biomarker's discriminative abilities. Analysis included 13 ectopic pregnancies, 76 early pregnancy losses, and 27 viable intrauterine pregnancies. For pregnancy location, 18 markers had an area under the curve (AUC) ≥0.80, with three being expressed more in ectopic compared to non-ectopic pregnancies: thyrotropin subunit beta, carbonic anhydrase 3, and DEAD (Asp-Glu-Ala-Asp) box polypeptide 58. For pregnancy viability, two markers had an AUC ≥0.80: lutropin subunit beta and serpin B8. While some of the markers had previously been implicated in early pregnancy physiology, others were from pathways not previously explored. Using a high-throughput platform, a large number of proteins were screened as potential biomarkers for pregnancy location and viability, and twenty candidate biomarkers were identified. Further exploration of these proteins may facilitate validation as diagnostic tools for establishing early pregnancy diagnoses.


Asunto(s)
Aborto Espontáneo , Embarazo Ectópico , Embarazo , Femenino , Humanos , Estudios de Casos y Controles , Embarazo Ectópico/diagnóstico , Biomarcadores
12.
Fertil Steril ; 120(5): 1023-1032, 2023 11.
Artículo en Inglés | MEDLINE | ID: mdl-37549835

RESUMEN

OBJECTIVE: To determine if ovarian responsiveness to gonadotropin stimulation differs by race/ethnicity and whether this predicts live birth rates (LBRs) in non-White patients undergoing in vitro fertilization (IVF). DESIGN: Retrospective cohort study. SETTING: Academic infertility center. PATIENT(S): White, Asian, Black, and Hispanic patients undergoing ovarian stimulation for IVF. INTERVENTION(S): Self-reported race and ethnicity. MAIN OUTCOME MEASURE(S): The primary outcome was ovarian sensitivity index (OSI), defined as (the number of oocytes retrieved ÷ total gonadotropin dose) × 1,000 as a measure of ovarian responsiveness, adjusting for age, body mass index, infertility diagnosis, and cycle number. Secondary outcomes included live birth and clinical pregnancy after first retrievals, adjusting for age, infertility diagnosis, and history of fibroids, as well as miscarriage rate per clinical pregnancy, adjusting for age, body mass index, infertility diagnosis, duration of infertility, history of fibroids, and use of preimplantation genetic testing for aneuploidy. RESULT(S): The primary analysis of OSI included 3,360 (70.2%) retrievals from White patients, 704 (14.7%) retrievals from Asian patients, 553 (11.6%) retrievals from Black patients, and 168 (3.5%) retrievals from Hispanic patients. Black and Hispanic patients had higher OSIs than White patients after accounting for those with multiple retrievals and adjusting for confounders (6.08 in Black and 6.27 in Hispanic, compared with 5.25 in White). There was no difference in OSI between Asian and White patients. The pregnancy outcomes analyses included 2,299 retrievals. Despite greater ovarian responsiveness, Black and Hispanic patients had lower LBRs compared with White patients, although these differences were not statistically significant after adjusting for confounders (adjusted odds ratio, 0.83; 95% confidence interval [CI], 0.63-1.09, for Black; adjusted odds ratio, 0.93; 95% CI, 0.61-1.43, for Hispanic). Ovarian sensitivity index was modestly predictive of live birth in White and Asian patients but not in Black (area under the curve, 0.51; 95% CI, 0.38-0.64) and Hispanic (area under the curve, 0.50; 95% CI, 0.37-0.63) patients. CONCLUSION(S): Black and Hispanic patients have higher ovarian responsiveness to stimulation during IVF but do not experience a consequent increase in LBR. Factors beyond differences in responsiveness to ovarian stimulation need to be explored to address the racial/ethnic disparity established in prior literature.


Asunto(s)
Infertilidad , Leiomioma , Embarazo , Femenino , Humanos , Nacimiento Vivo , Estudios Retrospectivos , Fertilización In Vitro/efectos adversos , Infertilidad/diagnóstico , Infertilidad/terapia , Infertilidad/etiología , Inducción de la Ovulación/efectos adversos , Tasa de Natalidad , Gonadotropinas , Leiomioma/etiología , Índice de Embarazo
14.
Elife ; 122023 Jun 22.
Artículo en Inglés | MEDLINE | ID: mdl-37347515

RESUMEN

Previously we reported evidence that a regenerative response in the appendages of moon jellyfish, fruit flies, and mice can be promoted by nutrient modulation (Abrams et al., 2021). Sustar and Tuthill subsequently reported that they had not been able to reproduce the induced regenerative response in flies (Sustar and Tuthill, 2023). Here we discuss that differences in the amputation method, treatment concentrations, age of the animals, and stress management explain why they did not observe a regenerative response in flies. Typically, 30-50% of treated flies showed response in our assay.


Asunto(s)
Drosophila , Escifozoos , Animales , Ratones , Escifozoos/fisiología , Nutrientes
15.
Res Sq ; 2023 May 05.
Artículo en Inglés | MEDLINE | ID: mdl-37205488

RESUMEN

Determining early pregnancy location and viability can be cumbersome, often requiring serial evaluations. This study aimed to identify novel biomarker candidates for pregnancy location and viability using a pseudodiscovery high through-put technique. This was a case-control study among patients presenting for early pregnancy assessment, including ectopic pregnancies, early pregnancy losses, and viable intrauterine pregnancies. For pregnancy location, ectopic pregnancy was considered "case" and non-ectopic considered "control." For pregnancy viability, viable intrauterine pregnancy was considered "case" and early pregnancy loss + ectopic pregnancy were considered "control." Using Proximity Extension Assay technology from Olink Proteomics, serum levels of 1012 proteins were compared separately for pregnancy location and viability. Receiver operator characteristic curves were generated to determine a biomarker's discriminative abilities. Analysis included 13 ectopic pregnancies, 76 early pregnancy losses, and 27 viable intrauterine pregnancies. For pregnancy location, 18 markers had an area under the curve (AUC) ≥ 0.80, with three being expressed more in ectopic compared to non-ectopic pregnancies: thyrotropin subunit beta, carbonic anhydrase 3, and DEAD (Asp-Glu-Ala-Asp) box polypeptide 58. For pregnancy viability, two markers had an AUC ≥ 0.80: lutropin subunit beta and serpin B8. While some of the markers were previously identified as implicated in early pregnancy physiology, others were from pathways not previously explored. Using a high through-put platform, a large number of proteins were screened as potential biomarkers for pregnancy location and viability, and twenty candidate biomarkers were identified. Further exploration of these proteins may facilitate validation as diagnostic tools for establishing early pregnancy diagnoses.

16.
JAMA ; 329(5): 434, 2023 02 07.
Artículo en Inglés | MEDLINE | ID: mdl-36749331

RESUMEN

This JAMA Patient Page describes ectopic pregnancy and its risk factors, symptoms, diagnosis, and treatment.


Asunto(s)
Embarazo Ectópico , Femenino , Humanos , Embarazo , Embarazo Ectópico/diagnóstico , Factores de Riesgo
17.
Fertil Steril ; 120(3 Pt 1): 521-527, 2023 09.
Artículo en Inglés | MEDLINE | ID: mdl-36849035

RESUMEN

Tremendous advances in genetics have transformed the field of reproductive endocrinology and infertility over the last few decades. One of the most prominent advances is preimplantation genetic testing (PGT), which allows for the screening of embryos obtained during in vitro fertilization before transfer. Moreover, PGT can be performed for aneuploidy screening, detection of monogenic disorders, or exclusion of structural rearrangements. Refinement of biopsy techniques, such as obtaining samples at the blastocyst rather than the cleavage stage, has helped optimize results from PGT, and technological advances, including next-generation sequencing, have made PGT more efficient and accurate. The continued evolution of the approach to PGT has the potential to further enhance the accuracy of results, expand the application to other conditions, and increase access by reducing cost and improving efficiency.


Asunto(s)
Infertilidad , Diagnóstico Preimplantación , Embarazo , Femenino , Humanos , Diagnóstico Preimplantación/métodos , Infertilidad/diagnóstico , Infertilidad/genética , Infertilidad/terapia , Pruebas Genéticas/métodos , Aneuploidia , Fertilización In Vitro , Blastocisto/patología
18.
Cureus ; 14(10): e30565, 2022 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-36415412

RESUMEN

Vaccination is the principal tool aimed at curbing the COVID-19 pandemic that has, so far, affected tens of millions of individuals in the United States. The two available mRNA vaccines developed by Pfizer-BioNTech and Moderna possess high efficacy in preventing infection and illness severity. However, there are multiple side effects associated with these vaccines, some impacting different organs. Renal pathology is variable, with increasing cases of glomerulonephritis being observed. We report a rare acute kidney injury case due to antineutrophil cytoplasmic autoantibody (ANCA)-mediated glomerulonephritis after administering a second dose of the Pfizer-BioNTech mRNA SARS-CoV-2 vaccine. Aggravation and/or development of autoimmunity after mRNA vaccination may involve multiple immune mechanisms leading to de novo and recurrent glomerular diseases with an autoimmune basis.

19.
J Clin Invest ; 132(18)2022 09 15.
Artículo en Inglés | MEDLINE | ID: mdl-36106638

RESUMEN

BACKGROUNDSeveral molecular imaging strategies can identify bacterial infections in humans. PET affords the potential for sensitive infection detection deep within the body. Among PET-based approaches, antibiotic-based radiotracers, which often target key bacterial-specific enzymes, have considerable promise. One question for antibiotic radiotracers is whether antimicrobial resistance (AMR) reduces specific accumulation within bacteria, diminishing the predictive value of the diagnostic test.METHODSUsing a PET radiotracer based on the antibiotic trimethoprim (TMP), [11C]-TMP, we performed in vitro uptake studies in susceptible and drug-resistant bacterial strains and whole-genome sequencing (WGS) in selected strains to identify TMP resistance mechanisms. Next, we queried the NCBI database of annotated bacterial genomes for WT and resistant dihydrofolate reductase (DHFR) genes. Finally, we initiated a first-in-human protocol of [11C]-TMP in patients infected with both TMP-sensitive and TMP-resistant organisms to demonstrate the clinical feasibility of the tool.RESULTSWe observed robust [11C]-TMP uptake in our panel of TMP-sensitive and -resistant bacteria, noting relatively variable and decreased uptake in a few strains of P. aeruginosa and E. coli. WGS showed that the vast majority of clinically relevant bacteria harbor a WT copy of DHFR, targetable by [11C]-TMP, and that despite the AMR, these strains should be "imageable." Clinical imaging of patients with [11C]-TMP demonstrated focal radiotracer uptake in areas of infectious lesions.CONCLUSIONThis work highlights an approach to imaging bacterial infection in patients, which could affect our understanding of bacterial pathogenesis as well as our ability to better diagnose infections and monitor response to therapy.TRIAL REGISTRATIONClinicalTrials.gov NCT03424525.FUNDINGInstitute for Translational Medicine and Therapeutics, Burroughs Wellcome Fund, NIH Office of the Director Early Independence Award (DP5-OD26386), and University of Pennsylvania NIH T32 Radiology Research Training Grant (5T32EB004311-12).


Asunto(s)
Infecciones Bacterianas , Trimetoprim , Antibacterianos/farmacología , Antibacterianos/uso terapéutico , Bacterias , Infecciones Bacterianas/diagnóstico por imagen , Infecciones Bacterianas/tratamiento farmacológico , Radioisótopos de Carbono , Escherichia coli , Humanos , Trimetoprim/farmacología , Trimetoprim/uso terapéutico
20.
Clin Cancer Res ; 28(24): 5330-5342, 2022 12 15.
Artículo en Inglés | MEDLINE | ID: mdl-35972732

RESUMEN

PURPOSE: Despite the success of chimeric antigen receptor (CAR) T-cell therapy against hematologic malignancies, successful targeting of solid tumors with CAR T cells has been limited by a lack of durable responses and reports of toxicities. Our understanding of the limited therapeutic efficacy in solid tumors could be improved with quantitative tools that allow characterization of CAR T-targeted antigens in tumors and accurate monitoring of response. EXPERIMENTAL DESIGN: We used a radiolabeled FAP inhibitor (FAPI) [18F]AlF-FAPI-74 probe to complement ongoing efforts to develop and optimize FAP CAR T cells. The selectivity of the radiotracer for FAP was characterized in vitro, and its ability to monitor changes in FAP expression was evaluated using rodent models of lung cancer. RESULTS: [18F]AlF-FAPI-74 showed selective retention in FAP+ cells in vitro, with effective blocking of the uptake in presence of unlabeled FAPI. In vivo, [18F]AlF-FAPI-74 was able to detect FAP expression on tumor cells as well as FAP+ stromal cells in the tumor microenvironment with a high target-to-background ratio. We further demonstrated the utility of the tracer to monitor changes in FAP expression following FAP CAR T-cell therapy, and the PET imaging findings showed a robust correlation with ex vivo analyses. CONCLUSIONS: This noninvasive imaging approach to interrogate the tumor microenvironment represents an innovative pairing of a diagnostic PET probe with solid tumor CAR T-cell therapy and has the potential to serve as a predictive and pharmacodynamic response biomarker for FAP as well as other stroma-targeted therapies. A PET imaging approach targeting FAP expressed on activated fibroblasts of the tumor stroma has the potential to predict and monitor therapeutic response to FAP-targeted CAR T-cell therapy. See related commentary by Weber et al., p. 5241.


Asunto(s)
Gelatinasas , Serina Endopeptidasas , Línea Celular Tumoral , Tomografía de Emisión de Positrones , Linfocitos T , Tomografía Computarizada por Tomografía de Emisión de Positrones , Radioisótopos de Galio
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