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Find video protocols related to scientific articles indexed in Pubmed.
Regulation of Endothelial Permeability in the Primate Corpora Lutea: Implications for OHSS.
Reproduction
PUBLISHED: 10-11-2014
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Developing human corpus luteum contains a closely regulated cellular communication system, between luteal steroidogenic cells and endothelial cells. This system guaranties the vascularization process during luteal formation. The process is combined with rapid release of large amounts of progesterone into the bloodstream. The regulation of endothelial proliferation and permeability by LH and human chorionic gonadotropin (hCG) is integral to this process. On the cellular level, endothelial permeability is regulated by intercellular junctions, such as: adherens junctions (AJ), and tight junctions (TJ), which act as zipper-like structures between interacting endothelial cells. Several cell junctional proteins are localized to the corpus luteum, including: Occludin, Nectin 2, Claudin 1 and Claudin 5, as well as, VE-Cadherin. It has been assumed that regulation of AJ- and TJ-proteins is of particular importance for permeability, and accordingly, for the functionality of the corpus luteum in early pregnancy - since treatment with hCG induces down regulation of juntional proteins in the luteal vessels. The effect of hCG on the adhesive molecules is mediated by vascular endothelial growth factor (VEGF). On a functional level, the hCG-dependent and VEGF-mediated decrease of junctional proteins cause a decrease in the density of cell-cell-closure, and accordingly, an increase in endothelial permeability. In doing so, the different junctional proteins are not only directly influenced by VEGF, but also interact among themselves and influence each other reciprocal. Disturbances of this strictly, regulated interactions may explain the development of pathologies with increased vascular permeability, such as the ovarian hyperstimulation syndrome (OHSS).
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Selective inhibition of class I but not class IIb histone deacetylases exerts cardiac protection from ischemia reperfusion.
J. Mol. Cell. Cardiol.
PUBLISHED: 02-18-2014
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While inhibition of class I/IIb histone deacetylases (HDACs) protects the mammalian heart from ischemia reperfusion (IR) injury, class selective effects remain unexamined. We hypothesized that selective inhibition of class I HDACs would preserve left ventricular contractile function following IR in isolated hearts. Male Sprague Dawley rats (n=6 per group) were injected with vehicle (dimethylsulfoxide, 0.63mg/kg), the class I/IIb HDAC inhibitor trichostatin A (1mg/kg), the class I HDAC inhibitor entinostat (MS-275, 10mg/kg), or the HDAC6 (class IIb) inhibitor tubastatin A (10mg/kg). After 24h, hearts were isolated and perfused in Langendorff mode for 30min (Sham) or subjected to 30min global ischemia and 120min global reperfusion (IR). A saline filled balloon attached to a pressure transducer was placed in the LV to monitor contractile function. After perfusion, LV tissue was collected for measurements of antioxidant protein levels and infarct area. At the conclusion of IR, MS-275 pretreatment was associated with significant preservation of developed pressure, rate of pressure generation, rate of pressure relaxation and rate pressure product, as compared to vehicle treated hearts. There was significant reduction of infarct area with MS-275 pretreatment. Contractile function was not significantly restored in hearts treated with trichostatin A or tubastatin A. Mitochondrial superoxide dismutase (SOD2) and catalase protein and mRNA in hearts from animals pretreated with MS-275 were increased following IR, as compared to Sham. This was associated with a dramatic enrichment of nuclear FOXO3a transcription factor, which mediates the expression of SOD2 and catalase. Tubastatin A treatment was associated with significantly decreased catalase levels after IR. Class I HDAC inhibition elicits protection of contractile function following IR, which is associated with increased expression of endogenous antioxidant enzymes. Class I/IIb HDAC inhibition with trichostatin A or selective inhibition of HDAC6 with tubastatin A was not protective. This study highlights the need for the development of new strategies that target specific HDAC isoforms in cardiac ischemia reperfusion.
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Identification of prognostic different subgroups in triple negative breast cancer by Her2-neu protein expression.
Arch. Gynecol. Obstet.
PUBLISHED: 01-27-2014
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Many patients with triple negative breast cancer (TNBC) have a poor outcome, but not all of them. This study has the aim to analyse the prognostic impact of tumour size, nodal status, grading, Her2-neu (human epithelial growth factor receptor 2) score and Ki-67 index. The main goal of this analysis is to find out if there are any differences in survival between patients with TNBC and a Her2-neu score 0 versus 1+2.
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Can ki-67 play a role in prediction of breast cancer patients' response to neoadjuvant chemotherapy?
Biomed Res Int
PUBLISHED: 01-13-2014
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Currently the choice of breast cancer therapy is based on prognostic factors. The proliferation marker Ki-67 is used increasingly to determine the method of therapy. The current study analyses the predictive value of Ki-67 in foreseeing breast cancer patients' responses to neoadjuvant chemotherapy.
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Evaluation and treatment of pain in critically ill adults.
Semin Respir Crit Care Med
PUBLISHED: 05-28-2013
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Pain is experienced by the overwhelming majority of patients during their intensive care unit stay, but it remains an underappreciated problem. To effectively treat pain, it must be detected and quantified using a validated assessment tool. It is acknowledged that optimal pain relief may be difficult to achieve given the complex interplay of coexisting medical conditions and the environment in which care is provided. Nonetheless, by following structured approaches to pain, resource consumption may be reduced, and even improved survival may be realized. This review covers practices and techniques specific to addressing and treating pain in the adult intensive care environment. Traditional pharmacological approaches including opiate and nonopiate medications are reviewed, as are regional anesthetic techniques and nonpharmacological approaches used for controlling pain.
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Practical considerations for the dosing and adjustment of continuous renal replacement therapy in the intensive care unit.
J Crit Care
PUBLISHED: 04-15-2013
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Familiarity with the initiation, dosing, adjustment, and termination of continuous renal replacement therapy (CRRT) is a core skill for contemporary intensivists. Guidelines for how to administer CRRT in the intensive care unit are not well documented. The purpose of this review is to discuss the modalities, terminology, and components of CRRT, with an emphasis on the practical aspects of dosing, adjustments, and termination. Management of electrolyte and acid-base derangements commonly encountered with acute renal failure is emphasized. Knowledge regarding the practical aspects of managing CRRT in the intensive care unit is a prerequisite for achieving desired physiological end points.
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Factors influencing hospital length of stay after robotic totally endoscopic coronary artery bypass grafting.
Ann. Thorac. Surg.
PUBLISHED: 01-24-2013
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Robotic totally endoscopic coronary artery bypass grafting (TECAB) is an evolving minimally invasive technology with the potential to reduce hospital length of stay (LOS). Little is known about the factors that influence LOS after this procedure. The aim of this study is to define the preoperative, intraoperative, and postoperative variables that predict LOS after TECAB.
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Human chorionic gonadotropin controls luteal vascular permeability via vascular endothelial growth factor by down-regulation of a cascade of adhesion proteins.
Fertil. Steril.
PUBLISHED: 01-07-2013
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To study the functional interactions of junctional proteins acting as regulators of vascular permeability in the human corpus luteum. We investigated the role of vascular endothelial (VE)-cadherin, nectin 2, and claudin 5 as controllers of vascular endothelial cell permeability.
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Local Renin-Angiotensin System in the Reproductive System.
Front Endocrinol (Lausanne)
PUBLISHED: 01-01-2013
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The renin-angiotensin system (RAS) is well known as regulator of electrolytes and blood pressure. Besides this function, there are numerous studies supporting the idea of a local tissue RAS. This system controls the local activity of the different RAS family members, especially of the functional proteins Angiotensin II and Angiotensin (1-7). Those antagonistically acting proteins have been described to be expressed in different organ systems including the human reproductive tract. Therefore, this local RAS has been suspected to be involved in the control and regulation of physiological and pathological conditions in the female reproduction tract. This review of the available literature summarizes the physiological influence of the RAS on the follicular development, ovarian angiogenesis, and placental- and uterine function. In addition, in the second part the role of the RAS concerning ovarian- and endometrial cancer becomes elucidated. This section includes possible novel therapeutic strategies via inhibition of RAS-mediated tumor growth and angiogenesis. Looking at a very complex system of agonistic and antagonistic tissue factors, it may be supposed that the RAS in the female reproduction tract will be of rising scientific interest in the upcoming years.
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Is there a role of the local tissue RAS in the regulation of physiologic and pathophysiologic conditions in the reproductive tract?
J Renin Angiotensin Aldosterone Syst
PUBLISHED: 08-08-2011
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The renin-angiotensin system is well known as a systemic endocrine pathway that regulates blood pressure and salt-water metabolism. In addition to the systemic renin-angiotensin system there is evidence in different species for the presence of a local tissue renin-angiotensin system, which allows local production of the bioactive peptides angiotensin II and angiotensin (1-7). The local renin-angiotensin system has been found in a variety of tissues including tissue of the human reproductive tract. Thus, it was suspected that it may have important functions in the local hormonal microenvironment. Here, a systematic literature search was undertaken to review whether there is evidence for regulatory functions of the local tissue renin-angiotensin system in the human reproductive tract under physiological and pathological conditions.
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Is vasoplegic syndrome more prevalent with open-heart procedures compared with isolated on-pump CABG surgery?
Cardiovasc Revasc Med
PUBLISHED: 03-01-2011
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Postoperative vasoplegic syndrome (PVS) is a frequent complication and can affect the early postoperative course. Our study investigated the incidence and risk factors of PVS after on-pump isolated coronary artery grafting bypass (CABG) and on-pump open-heart surgery. A total of 629 patients underwent on-pump cardiac surgery from November 21, 2005, to June 9, 2006, at our institution. Of those, 334 patients underwent on-pump isolated CABG and 295 patients had open-heart surgery. PVS was defined based on the recognized criteria. Multivariate logistic regression analysis was used to identify the risk factors for PVS. The overall incidence of PVS was 11.7%. The incidence in isolated on-pump CABG surgery was 6.9% and 17.0% in open-heart surgery (P<.01). In multivariate analysis, isolated CABG reduced by half the incidence of PVS [odds ratio (OR)=0.45, P=.02]; preoperative left ventricular ejection fraction (EF) <35% was identified as an independent predictor of PVS (OR=2.1, P=.01), and a protective effect of female gender for PVS was observed (OR=0.4, P=.01). The association between angiotensin-converting enzyme inhibitors and other preoperative medical treatments was not confirmed by our study. In conclusion, PVS occurred less often after isolated CABG surgery than after open-heart surgery. Advanced age and low preoperative EF strongly predicted PVS.
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Conversion from intravenous insulin to subcutaneous insulin after cardiovascular surgery: transition to target study.
Diabetes Technol. Ther.
PUBLISHED: 02-03-2011
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No study of transition from intravenous to subcutaneous insulin after cardiac surgery with dose based on percentage of intravenous total daily insulin (TDI) has reported a clearly superior regimen for achieving target blood glucose. We compared three first-dose transition strategies for insulin glargine: two based on TDI alone and one that also took body weight into account.
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Cervical hydatidiform mole pregnancy after missed abortion presenting with severe vaginal bleeding: case report and review of the literature.
Eur. J. Obstet. Gynecol. Reprod. Biol.
PUBLISHED: 01-26-2011
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We report a 28-year-old woman presenting with a complete hyaditiform mole localized to the cervix. She had undergone curettage of missed abortion two months previously and the aborted material showed normal placental tissue on histopathologic examination. Two months after curettage she presented with sudden severe vaginal bleeding. Clinical examination revealed a lesion of the epithelial outer surface of the cervix. Due to the bleeding, immediate surgical intervention was necessary. Histological examination revealed a complete hydatidiform mole. Currently, only three cases of this exceedingly rare diagnosis have been published: two reported a partial mole and one a complete hydatidiform mole. In our case, we hypothesize that the pathogenesis took place in two steps. Initially the curettage of the missed abortion damaged the endometrial lining. During a new rapid re-fertilization after the missed abortion, a hydatidiform molar pregnancy developed. Normally this abnormal trophoblast tissue would adhere to the endometrium but in this case we assume that intrauterine implantation was not possible because of endometrial damage at the prior curettage, allowing the abnormal trophoblast tissue to pass the endocervix and emerge into the vaginal vault. Presumably, during the curettage an epithelial defect was produced on the outer surface of the cervix, due to clamping the cervix during dilatation. We speculate that this weak spot on the epithelial surface was responsible for the adherence to the cervix and subsequent bleeding was caused by injury of maternal blood vessels. We propose that careful holding of the cervix with atraumatic clamps during curettage is important to avoid subsequent complications.
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Exacerbation of a maternal hiatus hernia in early pregnancy presenting with symptoms of hyperemesis gravidarum: case report and review of the literature.
Arch. Gynecol. Obstet.
PUBLISHED: 07-06-2010
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We report on a 30-year old woman presenting with symptoms of hyperemesis gravidarum and subsequent vomiting at the end of the first trimester (12 + 0 weeks of gestation). The patient was initially presented with nausea and vomiting, without any signs or symptoms of intra-abdominal disorders. On the 2nd day, symptoms became worse and she complained right sided upper abdominal pain, therefore abdominal ultrasound was performed, showing no remarkable findings, explaining the disorder. Clinical symptoms increased and the patient complained suddenly severe dyspnoea and intractable cough. Therefore, immediately an X-ray examination of the thorax was performed showing a severe left sided diaphragmatic hiatus hernia with consecutive displaced stomach into the thoracic cavity, making immediate surgical intervention necessary.
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B-cell-specific elements enhance sustained gene expression mediated by self-replicating extrachromosomal vectors.
Mol Med Rep
PUBLISHED: 03-09-2010
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Retroviral vectors have been considered the most promising vehicles for the transfer of therapeutic genes into cells of the hematopoietic system. In clinical studies, however, cases of leukemoid clonogenic expansion of the transduced cells in vivo caused by semirandom integration of the foreign DNA in the genome have changed the focus to other types of vectors. In addition to their superior safety profile, a higher packaging capacity might be an advantage of non-viral vectors in certain applications. Prolonged transgene expression of non-viral vectors can be achieved by inclusion of Epstein-Barr virus (EBV)-derived elements mediating episomal replication and retention. Furthermore, a variety of cis acting elements have been explored in an attempt to enhance gene transfer efficiency. Our study confirmed that prolonged transgene expression can be achieved in B-lymphoid cells with EBV-derived vectors containing the EBV latent gene EBNA-1 and the EBV latent origin of replication oriP. In addition, we demonstrated that the inclusion of enhancer elements of the immunoglobulin ? light chain (Ei and E3) associated with its matrix attachment region (MAR) resulted in a 10-fold increase in transgene expression in B-lymphoid cells. It can be concluded that these elements are generally useful modules for improving the efficiencies of non-viral vectors in the B-lymphoid lineage.
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Effect of dexmedetomidine versus lorazepam on outcome in patients with sepsis: an a priori-designed analysis of the MENDS randomized controlled trial.
Crit Care
PUBLISHED: 01-07-2010
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Benzodiazepines and alpha2 adrenoceptor agonists exert opposing effects on innate immunity and mortality in animal models of infection. We hypothesized that sedation with dexmedetomidine (an alpha2 adrenoceptor agonist), as compared with lorazepam (a benzodiazepine), would provide greater improvements in clinical outcomes among septic patients than among non-septic patients.
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Prognostic impact of satellite-lymphovascular space involvement in early-stage cervical cancer.
Ann. Surg. Oncol.
PUBLISHED: 03-27-2009
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Currently the prognostic value of lymphovascular space involvement (LVSI) in patients with cervical cancer is unclear. We evaluated the prognostic impact of different categories of LVSI on overall survival (OAS) and disease-free survival (DFS) in a Middle-European population of women with surgically staged, early cervical cancer. The records of 281 women with clinically and histologically diagnosed early cervical cancer undergoing primary surgical treatment at the University of Ulm School of Medicine between 1992 and 2006 were retrospectively reviewed. LVSI as determined by hematoxylin-eosin staining was topographically categorized as conjoined-LVSI and satellite-LVSI. The effect of LVSI, tumor stage, lymph node metastases, and histology on OAS and DFS was assessed by Cox regression analyses. Tumor size and nodal status could be confirmed as significant prognostic factors for OAS and DFS in early-stage cervical cancer. While no significant effect of LVSI in general (satellite-LVSI or conjoined-LVSI) on OAS and DFS was calculated, the presence of satellite-LVSI was associated with significant decreased rates of both, OAS and DFS. We propose satellite-LVSI as new risk factor for patients with early-stage cervical cancer, in order to better identify the patients urgently needing adjuvant therapy.
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Regulated expression of the renin-angiotensin-system in human granulosa lutein cells: angiotensin II increases VEGF expression but its synthesis is reduced by hCG.
Arch. Gynecol. Obstet.
PUBLISHED: 03-18-2009
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The Renin-Angiotensin-System (RAS) has been suspected not only to control vascular tone but also to regulate angiogenesis. Angiotensin II has been shown to influence angiogenic factors such as vascular endothelial growth factor (VEGF). The Corpus luteum undergoes intense VEGF-dependent angiogenesis, regulated by luteinising hormone (LH) and human chorionic gonadotrophin (hCG). We therefore hypothesised, that locally produced Angiotensin II could act as a physiological co-regulator with hCG in luteal VEGF expression.
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Complicated skin and skin-structure infections and catheter-related bloodstream infections: noninferiority of linezolid in a phase 3 study.
Clin. Infect. Dis.
PUBLISHED: 01-24-2009
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Catheter-related bloodstream infection (CRBSI) causes substantial morbidity and mortality, but few randomized, controlled studies have been conducted to guide therapeutic interventions.
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Multiprofessional survey of protocol use in the intensive care unit.
J Crit Care
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To date, there has been no large multicenter, multiprofessional evaluation of protocol and guideline use in the intensive care unit (ICU). The primary purpose of this study was to describe national availability, development, implementation, and assessment of protocols in ICUs. A secondary objective was to compare perceived utility by ease of use, patient safety, cost containment, and compliance of protocols between nurses, physicians, and pharmacists.
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Results of phase 2 safety and feasibility study of treatment with levetiracetam for prevention of posttraumatic epilepsy.
Arch. Neurol.
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To evaluate the safety and tolerability of treatment with levetiracetam and determine the trough levels of levetiracetam in patients with traumatic brain injury (TBI) who are at high risk for posttraumatic epilepsy (PTE).
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Results of phase II pharmacokinetic study of levetiracetam for prevention of post-traumatic epilepsy.
Epilepsy Behav
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Levetiracetam (LEV) has antiepileptogenic effects in animals and is a candidate for prevention of epilepsy after traumatic brain injury. Pharmacokinetics of LEV in TBI patients was unknown. We report pharmacokinetics of TBI subjects?6years with high PTE risk treated with LEV 55mg/kg/day orally, nasogastrically or intravenously for 30days starting ?8h after injury in a phase II safety and pharmacokinetic study. Forty-one subjects (26 adults and 15 children) were randomized to PK studies on treatment days 3 and 30. Thirty-six out of forty-one randomized subjects underwent PK study on treatment day 3, and 24/41 subjects underwent PK study on day 30. On day 3, mean T(max) was 2.2h, C(max) was 60.2?g/ml and AUC was 403.7?g/h/ml. T(max) was longer in the elderly than in children and non-elderly adults (5.96h vs. 1.5h and 1.8h; p=0.0001). AUC was non-significantly lower in children compared with adults and the elderly (317.4?g/h/ml vs. 461.4?g/h/ml and 450.2?g/h/ml; p=0.08). C(max) trended higher in i.v.- versus tablet- or n.g.-treated subjects (78.4?g/ml vs. 59?g/ml and 48.2?g/ml; p=0.07). AUC of n.g. and i.v. administrations was 79% and 88% of AUC of oral administration. There were no significant PK differences between days 3 and 30. Treatment of TBI patients with high PTE risk with 55mg/kg/day LEV, a dose with antiepileptogenic effect in animals, results in plasma LEV levels comparable to those in animal studies.
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VEGF induces ascites in ovarian cancer patients via increasing peritoneal permeability by downregulation of Claudin 5.
Gynecol. Oncol.
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To evaluate the role of VEGF-dependent Claudin 5 production for the development of ascites via influencing endothelial permeability in peritoneal tissue of ovarian cancer patients.
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What is Visualize?

JoVE Visualize is a tool created to match the last 5 years of PubMed publications to methods in JoVE's video library.

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We use abstracts found on PubMed and match them to JoVE videos to create a list of 10 to 30 related methods videos.

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In developing our video relationships, we compare around 5 million PubMed articles to our library of over 4,500 methods videos. In some cases the language used in the PubMed abstracts makes matching that content to a JoVE video difficult. In other cases, there happens not to be any content in our video library that is relevant to the topic of a given abstract. In these cases, our algorithms are trying their best to display videos with relevant content, which can sometimes result in matched videos with only a slight relation.