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1.
Artículo en Inglés | MEDLINE | ID: mdl-39266256

RESUMEN

BACKGROUND AND PURPOSE: Physician-industry relationships can be useful for driving innovation and technologic progress, though little is known about the scale or impact of industry involvement in neuroradiology. The purpose of this study was to assess the trends and distributions of industry payments to neuroradiologists. MATERIALS AND METHODS: Neuroradiologists were identified using a previously-validated method based on Work Relative Value Units and Neiman Imaging Types of Service classification. Data on payments from industry were obtained from the Open Payments database from the Centers for Medicare & Medicaid Services, from 2016 to 2021. Payments were grouped into 7 categories, including consulting fees, education, gifts, medical supplies, research, royalties/ownership, and speaker fees. Descriptive statistics were calculated. RESULTS: A total of 3019 neuroradiologists were identified in this study. Between 2016 and 2021, 48% (1440/3019) received at least 1 payment from industry, amounting to a total number of 21,967 payments. Each year, among those receiving payments from industry, each unique neuroradiologist received between a mean of 5.49-7.42 payments and a median of 2 payments, indicating a strong rightward skew to the distribution of payments. Gifts were the most frequent payment type made (60%, 13,285/21,967) but accounted for only 4.1% ($689,859/$17,010,546) of payment value. The greatest aggregate payment value came from speaker fees, which made up 36% ($6,127,484/$17,010,546) of the total payment value. The top 5% highest paid neuroradiologists received 42% (9133/21,967) of payments, which accounted for 84% ($14,284,120/$17,010,546) of the total dollar value. Since the start of the coronavirus 2019 (COVID-19) pandemic, the number of neuroradiologists receiving industry payments decreased from a mean of 671 neuroradiologists per year prepandemic (2016-2019) to 411 in the postpandemic (2020-2021) era (P = .030). The total number of payments to neuroradiologists decreased from 4177 per year prepandemic versus 2631 per year postpandemic (P = .011). CONCLUSIONS: Industry payments to neuroradiologists are highly concentrated among top earners, particularly among the top 5% of payment recipients. The number of payments decreased during the COVID-19 pandemic, though the dollar value of payments was offset by coincidental increases in royalty payments. Further investigation is needed in subsequent years to determine if the postpandemic changes in industry payment trends continue.

2.
medRxiv ; 2024 Aug 20.
Artículo en Inglés | MEDLINE | ID: mdl-39228724

RESUMEN

Background: Existing studies on osteoradionecrosis of the jaw (ORNJ) have primarily used cross-sectional data, assessing risk factors at a single time point. Determining the time-to-event profile of ORNJ has important implications to monitor oral health in head and neck cancer (HNC) long-term survivors. Methods: Demographic, clinical and dosimetric data were retrospectively obtained for a clinical observational cohort of 1129 patients with HNC treated with radiotherapy (RT) at The University of Texas MD Anderson Cancer Center. ORNJ was diagnosed in 198 patients (18%). A multivariable logistic regression analysis with forward stepwise variable selection identified significant predictors for ORNJ. These predictors were then used to train a Weibull Accelerated Failure Time (AFT) model, which was externally validated using an independent cohort of 265 patients (92 ORNJ cases and 173 controls) treated at Guy's and St. Thomas' Hospitals. Findings: Our model identified that each unit increase in D25% is significantly associated with a 12% shorter time to ORNJ (Adjusted Time Ratio [ATR] 0·88, p<0·005); pre-RT dental extractions was associated to a 27% faster (ATR 0·73, p=0·13) onset of ORNJ; male patients experienced a 38% shorter time to ORNJ (ATR 0·62, p = 0·11). The model demonstrated strong internal calibration (integrated Brier score of 0·133, D-calibration p-value 0.998) and optimal discrimination at 72 months (Harrell's C-index of 0·72). The model also showed good generalization to the independent cohort, despite a slight drop in performance. Interpretation: This study is the first to demonstrate a direct relationship between radiation dose and the time to ORNJ onset, providing a novel characterization of the impact of delivered dose not only on the probability of a late effect (ORNJ), but the conditional risk during survivorship. Funding: This work was supported by various funding sources including NIH, NIDCR, NCI, NAPT, NASA, BCM, Affirmed Pharma, CRUK, KWF Dutch Cancer Society, NWO ZonMw, and the Apache Corporation.

3.
Contraception ; : 110702, 2024 Sep 06.
Artículo en Inglés | MEDLINE | ID: mdl-39244187

RESUMEN

OBJECTIVE: To describe experiences with contraception counseling training and provision of obstetrics and gynecology residents training in California and Florida. STUDY DESIGN: We conducted a mixed-methods study of obstetrics and gynecology residents training across 19 programs (with approximately 428 residents) in California and Florida from September 2022 through February 2023. We asked participants how often they use tiered-effectiveness counseling, their satisfaction with contraception counseling practices, and experiences with witnessing and recognizing contraception coercion. We asked about personal disappointment when patients decline long-acting reversible contraception (LARC) and pressure from faculty to prescribe LARC. To further explore resident contraception counseling education and behaviors, we conducted semi-structured telephone interviews with a subset of 20 survey volunteers. RESULTS: We received survey responses from 155 (36.2%) participants. Most (n = 113 [76.4%]) often or always reported using tiered-effectiveness counseling. While few participants (n = 17 [11.3%]) reported feeling pressure from faculty to convince a patient to keep a LARC, some (n = 34 [22.1%]) reported they often or always feel disappointed when a patient chooses LARC removal, with more Florida participants reporting disappointment (n = 19 [37.3%]) compared to California (n = 15 [14.6%], p = 0.01). We identified two main themes from the telephone interviews. First, residents feel they have limited formal education on how to provide contraceptive counseling and commonly learn these practices by emulating supervising faculty or peer counseling styles. Second, residents are informally taught, through feedback and interactions with supervising faculty and peers, that successful contraception counseling is the ability to convince patients to use highly effective contraception. CONCLUSION: When residents lack formalized contraception counseling education, they adopt counseling behaviors that may not be patient centered. IMPLICATIONS: When obstetrics and gynecology residents lack formalized contraception counseling education, they learn practices that may lead to coercive counseling behaviors during training. Resident education should include recognition and mitigation of contraception coercion and patient-centered counseling both through a formalized curriculum and socialization of trainees during their medical education.

4.
AJR Am J Roentgenol ; 2024 Aug 14.
Artículo en Inglés | MEDLINE | ID: mdl-39140632

RESUMEN

Background: Advanced MRI-based neuroimaging techniques, such as perfusion and spectroscopy, have been increasingly incorporated into routine follow-up protocols in patients treated for high-grade glioma (HGG), to help differentiate tumor progression from treatment effect. However, these techniques' influence on clinical management remains poorly understood. Objective: To evaluate the impact of MRI-based advanced neuroimaging on clinical decision-making in patients with HGG in the posttreatment setting. Methods: This prospective study, performed at a comprehensive cancer center from March 1, 2017, to October 31, 2020, included adult patients treated by chemoradiation for WHO grade 4 diffuse glioma who underwent MRIbased advanced neuroimaging (comprising multiple perfusion imaging sequences and spectroscopy) to further evaluate findings on conventional MRI equivocal for tumor progression versus treatment effect. The ordering neuro-oncologists completed surveys before and after each advanced neuroimaging session. The percent of care episodes with a change between the intended and actual management plan on the surveys conducted before and after advanced neuroimaging, respectively, was computed and compared with a previously published percent using the Wald test for independent samples proportions. Results: The study included 63 patients (mean age, 55±13 years; 36 women, 27 men) who underwent 70 advanced neuroimaging sessions. Ordering neuro-oncologists' intended and actual management plans on the surveys completed before and after advanced neuroimaging, respectively, differed in 44% (31/70, [95% CI: 33-56%]) of episodes, which differed from the previously published frequency of 8.5% (5/59) (p<.001). These management plan changes included selection of a different plan for 6/8 episodes with an intended plan to enroll patients in a clinical trial, 12/19 episodes with an intended plan to change chemotherapeutic agents, 4/8 episodes with an intended plan of surgical intervention, and 1/2 episodes with an intended plan of re-irradiation. The ordering neuro-oncologists found advanced neuroimaging to be helpful in 93% (95% CI: 87%-99%) (65/70) of episodes. Conclusion: Neuro-oncologists' management plans changed in a substantial fraction of adult patients with HGG who underwent advanced neuroimaging to further evaluate conventional MRI findings equivocal for tumor progression versus treatment effect. Clinical Impact: The findings support incorporation of advanced neuroimaging into HGG posttreatment monitoring protocols.

5.
J Surg Res ; 301: 398-403, 2024 Jul 18.
Artículo en Inglés | MEDLINE | ID: mdl-39029263

RESUMEN

INTRODUCTION: Surgeries for chronic pancreatitis are tailored based on disease process and either include parenchymal-preserving surgeries or total pancreatectomy with or without islet cell autotransplantation. It is critical to account for vascular variants as injuries to these are associated with short- and long-term morbidity and mortality. There is a lack of contemporary data on the true incidence of aberrant arterial anatomy, and it is likely to be underreported by nonhepatobiliary radiologists. METHODS: This study is a retrospective analysis of all patients undergoing pancreatic resections for chronic pancreatitis at the single center. The presence of vascular variants was compared between standard reporting and preoperative imaging review by a hepatobiliary radiologist and surgeon. Primary outcomes were operative time and blood loss. RESULTS: Of the 72 pancreatic resections for chronic pancreatitis, 50 (69%) satisfied inclusion criteria. Three of fifty (6%) had vascular anomalies reported on standard reporting while 11 (22%) had vascular anomalies identified on preoperative imaging review and confirmed at surgery. Hence, only 27% of patients with variant vascular anatomy were reported on standard imaging. There was no significant difference in operative times or blood loss between those with and without known vascular anomalies. CONCLUSIONS: Pancreatic resection is a complex undertaking as long-standing inflammation distorts anatomic planes and increases opportunity for inadvertent vascular injury especially if there are aberrant vessels. In this study, we found that anatomic vascular variants are oftentimes not reported. Dedicated surgical planning with review of cross-sectional imaging identified all cases of anatomic variants resulting in no difference in operative time or incidence of intraoperative hemorrhage.

6.
Surg Endosc ; 2024 Jul 31.
Artículo en Inglés | MEDLINE | ID: mdl-39085668

RESUMEN

BACKGROUND: Bariatric surgery has been proven safe in end-stage kidney disease (ESKD); however, few studies have evaluated whether a history of bariatric surgery impacts transplant-specific outcomes. We hypothesize that a history of bariatric surgery at the time of transplant does not adversely impact transplant-specific outcomes. METHODS: The IBM MarketScan Commercial Claims and Encounters database was queried for patients with a history of kidney transplant between 2000 and 2021. Patients were stratified into three groups based on bariatric surgery status and body mass index (BMI) at the time of transplant: patients with obesity (O), patients without obesity (NO), and patients with a history of bariatric surgery (BS). Inverse probability of treatment weighting was used to control for confounding. Adjusted hazard ratios (aHRs) describing the risk of transplant-specific and postoperative outcomes were estimated using weighted Kaplan-Meier curves. Primary outcomes included 30-day and 1-year risk of transplant-specific outcomes. Secondary outcomes included 30-day and 1-year postoperative complications and 30-day and 1-year risk of wound-related complications. RESULTS: We identified 14,806 patients; 128 in the BS group, 1572 in the O group, and 13,106 in the NO group. There was no difference in 30-day or 1-year risk of transplant-specific complications between the BS and NO group or the O and NO group. Patients with obesity (O) were more likely to experience wound infection (aHR 1.49, 95% CI 1.12-1.99), wound dehiscence (aHR 2.2, 95% CI 1.5-3.2), and minor reoperation (aHR 1.52, 95% CI 1.23-1.89) at 1 year. BS patients had increased risk of wound infection at 1 year (aHR 2.79, 95% CI 1.26-6.16), but were without increase in risk of minor or major reoperation. CONCLUSION: A history of bariatric surgery does not adversely affect transplant-specific outcomes after kidney transplant. Bariatric surgery can be safely utilized to improve the transplant candidacy of patients with obesity with CKD and ESKD.

7.
Radiographics ; 44(8): e230179, 2024 08.
Artículo en Inglés | MEDLINE | ID: mdl-39024173

RESUMEN

Human papillomavirus (HPV) is the most common sexually transmitted infection that proliferates in the squamous epithelium and is the most common source of viral-related neoplasms. Low-risk subtypes (HPV-6 and -11) cause respiratory papillomas (laryngeal, tracheal, and bronchial) and condyloma acuminata of the penis, anus, and perineal region (anogenital warts). High-risk subtypes (HPV-16, -18, -31, and -33) are responsible for oropharyngeal squamous cell carcinoma (SCC) that involves the tongue base, tonsils, posterior pharyngeal wall, and larynx and malignancies of the anogenital region (cancers of the cervix, vagina, vulva, penis, and anal canal). Recent studies have increasingly shown a favorable treatment response and substantial differences in the overall prognosis associated with HPV-associated oropharyngeal cancers. Given this fact, oropharyngeal, cervical, and penile SCCs are classified as HPV-associated and HPV-independent cancers in the current World Health Organization classification. Imaging is essential in the early detection, diagnosis, and staging of HPV-associated cancers. Imaging also helps assess treatment response and postoperative complications and is used for long-term surveillance. HPV-associated oropharyngeal SCCs have well-defined borders and solid and cystic nodal metastases at imaging. Updated screening and vaccination guidelines are currently available that have great potential to decrease the overall disease burden and help control this worldwide public health concern. Novel therapeutic strategies, such as immunotherapies, are being explored, and imaging biomarkers that can predict treatment response and prognosis are being investigated; radiologists play a pivotal role in these efforts. ©RSNA, 2024 Supplemental material is available for this article.


Asunto(s)
Infecciones por Papillomavirus , Humanos , Infecciones por Papillomavirus/complicaciones , Infecciones por Papillomavirus/diagnóstico por imagen , Masculino , Femenino , Neoplasias Orofaríngeas/diagnóstico por imagen , Neoplasias Orofaríngeas/virología , Neoplasias Orofaríngeas/terapia , Carcinoma de Células Escamosas/diagnóstico por imagen , Carcinoma de Células Escamosas/terapia , Virus del Papiloma Humano
8.
Intern Med J ; 54(7): 1214-1218, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38884158

RESUMEN

Asciminib is a novel allosteric STAMP (specifically targets the ABL myristoyl pocket) inhibitor of the BCR::ABL1 oncogene. Real-world clinical outcomes of patients with tyrosine kinase inhibitor (TKI)-resistant/intolerant chronic myeloid leukaemia (CML) in Australia on the Managed Access Programme for asciminib showed higher molecular responses for those with intolerance versus resistance ± intolerance to their last TKI. There remains a clinical need to improve outcomes in patients with CML who have resistance to multiple TKIs, especially in the ponatinib-pretreated cohort.


Asunto(s)
Leucemia Mielógena Crónica BCR-ABL Positiva , Inhibidores de Proteínas Quinasas , Humanos , Leucemia Mielógena Crónica BCR-ABL Positiva/tratamiento farmacológico , Australia , Masculino , Persona de Mediana Edad , Inhibidores de Proteínas Quinasas/uso terapéutico , Femenino , Resultado del Tratamiento , Anciano , Adulto , Resistencia a Antineoplásicos , Proteínas de Fusión bcr-abl/antagonistas & inhibidores , Antineoplásicos/uso terapéutico , Piridazinas/uso terapéutico , Anciano de 80 o más Años , Niacinamida/análogos & derivados , Pirazoles
9.
Exp Clin Transplant ; 22(4): 311-313, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38742323

RESUMEN

Biliary strictures afterlivertransplant are amenable to endoscopic dilatation or percutaneous dilatation and stenting in most cases. In rare cases, for recurrence or tight stricture, surgery is required, and hepaticojejunostomy is the favored procedure. We report a case of posttransplant stricture in a duct-to-duct anastomosis that could not be accessed due to prior gastric bypass. Despite multiple percutaneous transhepatic cholangiography dilatations, the stricture recurred, and the patient was taken up for bilioenteric bypass. During surgery, dense adhesions in the infracolic compartment with chronically twisted jejunal loops, due to prior mini gastric bypass, were encountered, which prevented the creation of a jejunal Roux limb. Hepaticoduodenostomy was performed with no recurrence of stricture at 12 months. Hepaticoduodenostomy is a viable option for surgical management of recurrent biliary strictures, especially in a setting of prior bariatric/diversion procedures.


Asunto(s)
Duodenostomía , Trasplante de Hígado , Recurrencia , Reoperación , Humanos , Trasplante de Hígado/efectos adversos , Constricción Patológica , Resultado del Tratamiento , Colestasis/etiología , Colestasis/cirugía , Colestasis/diagnóstico por imagen , Persona de Mediana Edad , Anastomosis Quirúrgica , Femenino , Masculino , Colangiografía
10.
Pract Radiat Oncol ; 2024 Apr 27.
Artículo en Inglés | MEDLINE | ID: mdl-38685448

RESUMEN

PURPOSE: A dedicated magnetic resonance imaging simulation (MRsim) for radiation treatment (RT) planning in patients with high-grade glioma (HGG) can detect early radiologic changes, including tumor progression after surgery and before standard of care chemoradiation. This study aimed to determine the effect of using postoperative magnetic resonance imaging (MRI) versus MRsim as the baseline for response assessment and reporting pseudoprogression on follow-up imaging at 1 month (FU1) after chemoradiation. METHODS AND MATERIALS: Histologically confirmed patients with HGG were planned for 6 weeks of RT in a prospective study for adaptive RT planning. All patients underwent postoperative MRI, MRsim, and follow-up MRI scans every 2 to 3 months. Tumor response was assessed by 3 independent blinded reviewers using Response Assessment in Neuro-Oncology criteria when baseline was either postoperative MRI or MRsim. Interobserver agreement was calculated using Light's kappa. RESULTS: Thirty patients (median age, 60.5 years; IQR, 54.5-66.3) were included. Median interval between surgery and RT was 34 days (IQR, 27-41). Response assessment at FU1 differed in 17 patients (57%) when the baseline was postoperative MRI versus MRsim, including true progression versus partial response or stable disease in 11 (37%) and stable disease versus partial response in 6 (20%) patients. True progression was reported in 19 patients (63.3%) on FU1 when the baseline was postoperative MRI versus 8 patients (26.7%) when the baseline was MRsim (P = .004). Pseudoprogression was observed at FU1 in 12 (40%) versus 4 (13%) patients, when the baseline was postoperative MRI versus MRsim (P = .019). Interobserver agreement between observers was moderate (κ = 0.579; P < .001). CONCLUSIONS: Our study demonstrates the value of acquiring an updated MR closer to RT in patients with HGG to improve response assessment, and accuracy in evaluation of pseudoprogression even at the early time point of first follow-up after RT. Earlier identification of patients with true progression would enable more timely salvage treatments including potential clinical trial enrollment to improve patient outcomes.

11.
Womens Health Issues ; 34(3): 283-290, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38302344

RESUMEN

INTRODUCTION: We assessed awareness of the maternal health benefits of lactation among a sample of nulliparous pregnant individuals in the United States, identified variables associated with awareness of these benefits, and examined whether awareness of these benefits impacts breastfeeding attitudes or intentions. METHODS: We administered a web-based survey to nulliparous U.S.-born individuals carrying a singleton gestation of at least 28 weeks. We assessed awareness of the maternal health benefits of lactation using 10 items to create a summative score. We examined variation in awareness of these benefits by demographic characteristics, health insurance, and personal or family health history and used multivariable models to estimate associations between awareness of the maternal health benefits of lactation and breastfeeding intentions. RESULTS: Of the 675 individuals invited to complete surveys, 451 (67%) responded. Only 50% were aware that breastfeeding lowers maternal risk of breast cancer; fewer were aware that breastfeeding lowers the risk of ovarian cancer (35%), diabetes (27%), and hypertension and heart disease (26%). Awareness of the maternal benefits of lactation did not vary by age or race/ethnicity. However, significant regional variation was noted. In multivariable models, scores of awareness of the maternal health benefits of breastfeeding were significantly associated with intentions to breastfeed for at least 12 months (adjusted odds ratio, 1.23; 95% confidence interval, 1.11, 1.37). CONCLUSIONS: Efforts to increase awareness of the maternal health benefits of lactation are still needed. Increasing awareness of the maternal health benefits of lactation may strengthen intentions to breastfeed as recommended.


Asunto(s)
Lactancia Materna , Conocimientos, Actitudes y Práctica en Salud , Intención , Lactancia , Humanos , Femenino , Adulto , Embarazo , Estados Unidos , Lactancia Materna/estadística & datos numéricos , Lactancia Materna/psicología , Encuestas y Cuestionarios , Adulto Joven , Salud Materna , Concienciación , Factores Socioeconómicos , Neoplasias de la Mama/prevención & control
12.
Fam Med ; 56(3): 176-179, 2024 03.
Artículo en Inglés | MEDLINE | ID: mdl-38241744

RESUMEN

BACKGROUND AND OBJECTIVES: Student-run free clinics (SRFCs) are settings in which students in health professions gain clinical experience, often while providing free or reduced-cost health care to the surrounding community. The current literature quantifies the many benefits these clinics provide to their patients and the impact they have on students' future careers; but few previous studies have assessed the financial impact of the education provided at an SRFC. We report on a net educational benefit, an educational benefit to educational cost ratio, and a net educational benefit to educational cost ratio of one SRFC from the perspective of the university. METHODS: We calculated the value of education by multiplying all student hours worked in the clinic by the associated value of 1 hour in the typical tuition-based curriculum. Clinic educational costs and student hours were obtained from clinic records from August 1, 2021 through July 31, 2022. RESULTS: We found the total educational value students received to be $73,571 over one academic year. The educational operating expenses of the clinic totaled $9,053, resulting in a benefit-cost ratio of 8.13. CONCLUSIONS: This analysis demonstrated a potential financial advantage of operating an SRFC when assessing clinic education expenses in relation to the value of university-generated education. Our research may serve as a starting point to showcase the economic benefit of SRFCs to their parent institutions and encourage further analysis of other benefits SRFCs may provide to institutions of higher education.


Asunto(s)
Clínica Administrada por Estudiantes , Estudiantes de Medicina , Humanos , Instituciones de Atención Ambulatoria , Curriculum , Escolaridad
13.
Breastfeed Med ; 19(1): 52-58, 2024 01.
Artículo en Inglés | MEDLINE | ID: mdl-38190278

RESUMEN

Objective: To assess the effects of prenatal counseling about the maternal health benefits of lactation on postpartum knowledge, breastfeeding intentions, and infant feeding behaviors. Materials and Methods: We conducted a randomized trial with 411 nulliparous U.S.-born women carrying a singleton gestation. Participants were recruited online; after completing a baseline survey that assessed breastfeeding knowledge and intentions, participants were randomized to receive a 10-minute virtual counseling session about the benefits of breastfeeding or attention-control counseling about smoke-free homes. We collected data on breastfeeding knowledge, intentions, and infant feeding behaviors through 12 months postpartum and conducted an intention-to-treat analysis. Results: On enrollment, awareness of the maternal health benefits of lactation was similarly low in both study groups. Postpartum, participants who received this prenatal counseling intervention had significantly greater awareness that breastfeeding decreases maternal risk of breast cancer, ovarian cancer, diabetes, heart disease, and rheumatoid arthritis (p < 0.001 for all). On enrollment, intended duration of breastfeeding was similar between groups (10.1 months versus 9.7 months, p = 0.41). At 1-month postpartum, intended duration of breastfeeding had increased from baseline among those who received this counseling (+0.7 months versus -0.7 months among controls, p = 0.004); among intervention participants intended duration of breastfeeding decreased less at 3 (-0.8 versus -1.6, p = 0.18), 6 (-2.0 versus -3.0, p = 0.06), 9 (-2.8 versus -4.2, p = 0.03), and 12 months postpartum (-4.8 versus -6.2, p = 0.09). Rates of exclusive breastfeeding and any breastfeeding were similar between groups. Conclusion: Prenatal counseling on the maternal health benefits of lactation increases awareness of these maternal health benefits and extends intended duration of breastfeeding. ClinicalTrials.gov Identifier: NCT04601987.


Asunto(s)
Lactancia Materna , Salud Materna , Lactante , Embarazo , Femenino , Humanos , Lactancia Materna/psicología , Lactancia , Periodo Posparto , Consejo
14.
Neuro Oncol ; 26(1): 127-136, 2024 01 05.
Artículo en Inglés | MEDLINE | ID: mdl-37603323

RESUMEN

BACKGROUND: Endovascular selective intra-arterial (ESIA) infusion of cellular oncotherapeutics is a rapidly evolving strategy for treating glioblastoma. Evaluation of ESIA infusion requires a unique animal model. Our goal was to create a rabbit human GBM model to test IA infusions of cellular therapies and to test its usefulness by employing clinical-grade microcatheters and infusion methods to deliver mesenchymal stem cells loaded with an oncolytic adenovirus, Delta-24-RGD (MSC-D24). METHODS: Rabbits were immunosuppressed with mycophenolate mofetil, dexamethasone, and tacrolimus. They underwent stereotactic xenoimplantation of human GBM cell lines (U87, MDA-GSC-17, and MDA-GSC-8-11) into the right frontal lobe. Tumor formation was confirmed on magnetic resonance imaging, histologic, and immunohistochemistry analysis. Selective microcatheter infusion of MSC-D24 was performed via the ipsilateral internal carotid artery to assess model utility and the efficacy and safety of this approach. RESULTS: Twenty-five rabbits were implanted (18 with U87, 2 MDA-GSC-17, and 5 MDA-GSC-8-11). Tumors formed in 68% of rabbits (77.8% for U87, 50.0% for MDA-GSC-17, and 40.0% for MDA-GSC-8-11). On MRI, the tumors were hyperintense on T2-weighted image with variable enhancement (evidence of blood brain barrier breakdown). Histologically, tumors showed phenotypic traits of human GBM including varying levels of vascularity. ESIA infusion into the distal internal carotid artery of 2 ml of MSCs-D24 (107 cells) was safe in the model. Examination of post infusion specimens documented that MSCs-D24 homed to the implanted tumor at 24 hours. CONCLUSIONS: The intracranial immunosuppressed rabbit human GBM model allows testing of ESIA infusion of novel therapeutics (eg, MSC-D24) in a clinically relevant fashion.


Asunto(s)
Neoplasias Encefálicas , Glioblastoma , Animales , Humanos , Conejos , Glioblastoma/patología , Infusiones Intraarteriales , Neoplasias Encefálicas/terapia , Neoplasias Encefálicas/tratamiento farmacológico , Línea Celular Tumoral , Células Madre/patología
16.
Exp Clin Transplant ; 21(11): 879-882, 2023 11.
Artículo en Inglés | MEDLINE | ID: mdl-38140931

RESUMEN

OBJECTIVES: The recipient's gastroduodenal artery is often ligated before the hepatic artery anastomosis during orthotopic liver transplant, to gain either mobility or length of recipient's hepatic artery, potentially protecting the anastomosis by preventing "steal syndrome." In this study, our aim was to evaluate the consequences of gastroduodenal artery ligation and its effect on prevention of hepatic artery thrombosis. MATERIALS AND METHODS: We retrospectively analyzed deceased-donor orthotopic liver transplant procedures (n = 210) performed at a single center between January 2016 and July 2021 to compare outcomes between recipients with (group 1) and recipients without (group 2) gastroduodenal artery ligation. Group 1 included 78 patients (37%), in which the recipient's common hepatic artery was used for arterial anastomosis; group 2 included 132 patients (63%), in which the right hepatic artery orthe proper hepatic artery was used for arterial anastomosis. Occurrences of hepatic artery thrombosis, postoperative hyperamylasemia, nausea and vomiting, and delayed feeding were compared between the groups. RESULTS: There was no incidence of hepatic artery thrombosis reported in either group. In group 1, 31 patients (39.7%) were reported to have postoperative hyperamylasemia, ranging from 200 to 4700 U/L accompanied by delayed feeding, whereas, in group 2, only 16 of 132 patients (12%) had postoperative hyperamylasemia, ranging from 200 to 1400 U/L (P < .01). CONCLUSIONS: Ligation of recipient's gastroduodenal artery is not associated with decreased risk of hepatic artery thrombosis compared with nonligation. However, the procedure does have consequences in the form of possible postoperative hyperamylasemia, leading to delayed feeding probably due to decreased oral tolerance.


Asunto(s)
Hiperamilasemia , Hepatopatías , Trasplante de Hígado , Trombosis , Humanos , Arteria Hepática/cirugía , Trasplante de Hígado/efectos adversos , Trasplante de Hígado/métodos , Estudios Retrospectivos , Hiperamilasemia/complicaciones , Hepatopatías/complicaciones , Trombosis/etiología , Trombosis/prevención & control , Anastomosis Quirúrgica/efectos adversos , Anastomosis Quirúrgica/métodos
17.
Cell Host Microbe ; 31(12): 1956-1958, 2023 Dec 13.
Artículo en Inglés | MEDLINE | ID: mdl-38096789

RESUMEN

In this issue of Cell Host and Microbe, Meyer et al. explore the effects of host history on the inheritance of the plant microbiome. They find that transmission from the same plant species resulted in microbiota specialization, while transmission from a different species resulted in host generalism.


Asunto(s)
Microbiota , Plantas
19.
Expert Rev Endocrinol Metab ; 18(5): 419-425, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37680038

RESUMEN

INTRODUCTION: Chronic pancreatitis and recurrent acute pancreatitis comprise a spectrum of disease that results in complications related to exocrine and endocrine insufficiency and chronic pain with narcotic dependence and poor quality of life. The mainstay of therapy has been medical and endoscopic therapy; surgery, especially total pancreatectomy, was historically reserved for few select patients as the obligate exocrine insufficiency and pancreatogenic diabetes (type 3C) are challenging to manage. The addition of islet cell autotransplantation after total pancreatectomy helps to mitigate brittle type 3c diabetes and prevents mortality related to severe hypoglycemic episodes and hypoglycemic unawareness. There have been more recent data demonstrating the safety of surgery and the beneficial long-term outcomes. AREAS COVERED: The purpose of this review is to describe the current practices in the field of islet cell autotransplantation including the selection and evaluation of patients for surgery, their preoperative work up and management, surgical approach, post-operative management and outcomes. EXPERT OPINION: Total pancreatectomy and islet cell autotransplantation has the ability to drastically improve quality of life and prevent brittle diabetes for patients suffering with chronic pancreatitis.


Asunto(s)
Diabetes Mellitus Tipo 1 , Trasplante de Islotes Pancreáticos , Islotes Pancreáticos , Pancreatitis Crónica , Humanos , Trasplante Autólogo , Calidad de Vida , Enfermedad Aguda , Resultado del Tratamiento , Trasplante de Islotes Pancreáticos/efectos adversos , Trasplante de Islotes Pancreáticos/métodos , Pancreatitis Crónica/cirugía , Pancreatitis Crónica/complicaciones , Pancreatectomía/efectos adversos , Pancreatectomía/métodos , Diabetes Mellitus Tipo 1/complicaciones , Islotes Pancreáticos/cirugía , Hipoglucemiantes
20.
J Neurointerv Surg ; 15(11): 1059-1060, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37734931
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