1. Anatomie Rat biliaires Le diamètre moyen de la bile conduit et la longueur est de 1 mm et 29 mm, respectivement. La distance moyenne entre le pylore et la papille duodénale a été de 28 mm. Il ya deux principaux canaux pancréatiques qui s&#39;ouvrent dans le canal cholédoque - le conduit antérieure s&#39;ouvre sur le côté gauche et le canal postérieur s&#39;ouvre sur le côté droit. En plus de ces conduits principaux, un certain nombre de conduits qui drainent mineurs tous les trois portions du pancréas ouverts directement à la voie biliaire. 6 2. Technique Toutes les expériences sur les animaux ont été effectuées en accord avec le National Institutes of Health des lignes directrices pour la recherche éthique et ont été approuvés par le Comité de recherche de l&#39;institution et du Comité de protection des animaux. Des rats Sprague-Dawley âgés de 8 semaines ont été utilisés pour cette démonstration. Les rats ont été obtenus à partir de Charles River Laboratories à Wilmington, MA et toutes ont été plus de 300 grammes. Les rats ont eu accès à l&#39;alimentation de laboratoire standard et ont été logés ensemble dans des conditions standard de laboratoire. Les rats ont été anesthésiés avec un premier isofluorane et maintenu sous anesthésie pendant la chirurgie avec isofluorane à travers un masque. Une incision médiane de 2 cm a été faite à partir de la xiphisternum. Une fois l&#39;aponévrose a été ouvert, les lobes du foie étaient rentrés crânialement avec un écarteur de Sen, et le duodénum était rentré caudalement utilisant Q-tips. La voie biliaire a été identifié comme une structure tubulaire entrer dans le duodénum. La voie biliaire a été mis sous tension et partiellement à ciel ouvert. Un tube de 5 cm stérile en polyéthylène de long avec un diamètre intérieur de 0,6 mm et un diamètre extérieur de 0,9 mm a été utilisée. Une extrémité de ce tube a été scellé à chaud et l&#39;autre extrémité a été légèrement biseautés. L&#39;extrémité biseautée est ensuite passée dans le canal biliaire. Cela a été fixé en place en utilisant 8-0 sutures en nylon proximale et distale à l&#39;ouverture de la voie biliaire. Le tube reste avec l&#39;extrémité scellée a été placé dans la cavité péritonéale. Le site opératoire a été irriguée avec une solution saline normale. L&#39;abdomen a ensuite été fermé en 2 couches, avec suture Polyglactine 4-0. La ligne blanche a été fermée avec des sutures continues et les sutures interrompues dermiques ont été placés. Colle de peau a ensuite été appliqué sur la peau. Les rats ont été autorisés à récupérer dans des conditions standard de laboratoire à la surveillance de poids corporel par jour pour assurer une bonne hydratation. Pour l&#39;opération de retournement de cholestase, les rats ont été anesthésiés à l&#39;aide isofluorane comme décrit précédemment. L&#39;abdomen a été ouvert sur le site de l&#39;incision précédente. Le tube a été identifié et mis hors de la cavité péritonéale. Adhérences épiploïques autour du tube sont libérés en utilisant dissection et pointu. Un site dans le duodénum a ensuite été identifié pour un positionnement confortable du tube duodénostomie. Une suture chaîne de bourse, 2-3 mm de diamètre, a ensuite été placé en utilisant 8-0 nylon. Le duodénum a ensuite été ouvert à l&#39;intérieur de cette suture chaîne de bourse. L&#39;extrémité fermée du tube a ensuite été coupé à la longueur appropriée. Libre circulation de la bile a été assurée. Cette extrémité du tube a été ensuite placé dans le duodénum et la suture chaîne de bourse a été resserré. L&#39;abdomen a été irriguée et fermé en couches. Dans une étude précédente, où choledochoduodenostomy été réalisée en utilisant une technique différente, les rats ont été survécu pendant 12 semaines et les rats étaient en bonne santé pendant cette période. Aussi cette étude ont confirmé l&#39;inversion des changements biochimiques et histologiques après choledochoduodenostomy chez des rats soumis à une obstruction des voies biliaires, pour une période de 2 semaines. 7

<ol>
	<li>Gouma, D. J., Roughneen, P. T., Kumar, S., Moody, F. G., Rowlands, B. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Changes+in+nutritional+status+associated+with+obstructive+jaundice+and+biliary+drainage+in+rats.">Changes in nutritional status associated with obstructive jaundice and biliary drainage in rats.</a> Am J Clin Nutr. 44, 362-369 (1986).</li><li>Ohtsuka, M., Miyazaki, M., Kondo, Y., Nakajima, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Neutrophil-mediated+sinusoidal+endothelial+cell+injury+after+extensive+hepatectomy+in+cholestatic+rats.">Neutrophil-mediated sinusoidal endothelial cell injury after extensive hepatectomy in cholestatic rats.</a> Hepatology. 25, 636-641 (1997).</li><li>Abe, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Kupffer+cell-derived+interleukin+10+is+responsible+for+impaired+bacterial+clearance+in+bile+duct-ligated+mice.">Kupffer cell-derived interleukin 10 is responsible for impaired bacterial clearance in bile duct-ligated mice.</a> Hepatology. 40, 414-423 (2004).</li><li>Saiki, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Preoperative+internal+biliary+drainage+is+superior+to+external+biliary+drainage+in+liver+regeneration+and+function+after+hepatectomy+in+obstructive+jaundiced+rats.">Preoperative internal biliary drainage is superior to external biliary drainage in liver regeneration and function after hepatectomy in obstructive jaundiced rats.</a> Ann Surg. 230, 655-662 (1999).</li><li>Subhas, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Protective+effect+of+methylprednisolone+on+warm+ischemia-reperfusion+injury+in+a+cholestatic+rat+liver.">Protective effect of methylprednisolone on warm ischemia-reperfusion injury in a cholestatic rat liver.</a> Am J Surg. 199, 377-380 (2010).</li><li>Kara, M. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+anatomical+study+on+the+rat+pancreas+and+its+ducts+with+emphasis+on+the+surgical+approach.">The anatomical study on the rat pancreas and its ducts with emphasis on the surgical approach.</a> Ann Anat. 187, 105-112 (2005).</li><li>Ryan, C. J., Than, T., Blumgart, L. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Choledochoduodenostomy+in+the+rat+with+obstructive+jaundice.">Choledochoduodenostomy in the rat with obstructive jaundice.</a> J Surg Res. 23, 321-331 (1977).</li></ol>

Cholestase conduit à une myriade de changements dans le système gastro-intestinal. Des études ont été effectuées à la recherche des changements dans le système immunitaire et l&#39;état nutritionnel. Cholestase 1-3 peut affecter les résultats des chirurgies hépatiques. Des études ont été effectuées pour améliorer les résultats des chirurgies hépatiques, en présence de cholestase. 4-5 avec des améliorations dans la médecine et la recherche, des études complémentaires seront ef...

creation of reversible cholestatic rat model

La cholestase est une condition clinique communément rencontrés par les deux chirurgiens et les gastroentérologues. Cholestase peut causer divers changements physiologiques et affectent l&#39;état nutritionnel et des résultats chirurgicaux. Étude des changements physiopathologiques se produisant dans le foie et autres organes est d&#39;importance. Diverses études ont été effectuées dans des modèles de rats cholestatiques. Nous avons utilisé un modèle cholestatique réversible chez le rat dans notre étude récente portant sur le rôle de la méthylprednisolone dans les lésions de reperfusion d&#39;ischémie. Diverses techniques de création d&#39;un modèle cholestatique réversible ont été décrits. Création d&#39;un modèle de rat cholestatique réversible peut être difficile compte tenu de la taille plus petite et unique anatomie hepatopancreatobiliary chez le rat. Cet article démontre la vidéo de création d&#39;un modèle cholestatique réversible. Ce modèle peut être utilisé dans diverses études, telles que la recherche sur les changements dans nutritionnelles, physiologiques, pathologiques, des modifications histologiques et immunologiques dans le tractus gastro-intestinal. Ce modèle peut également être utilisé pour voir les effets de la cholestase et diverses interventions thérapeutiques sur les chirurgies hépatiques majeures.

Watch this Scientific Journal Video about Creation of Reversible Cholestatic Rat Model at JoVE.com

Creation of Reversible Cholestatic Rat Model

La cholestase est une condition clinique communément rencontrés par les deux chirurgiens et les gastroentérologues. Création d&#39;un modèle de rat cholestatique réversible peut être difficile compte tenu de la taille plus petite et unique anatomie hepatopancreatobiliary chez le rat. Cet article démontre la vidéo de création d&#39;un modèle cholestatique réversible.

Création du modèle de rat réversible cholestatique

Cholestasis is a clinical condition commonly encountered by both surgeons and gastroenterologists. Cholestasis can cause various physiological changes and ...

creation-of-reversible-cholestatic-rat-model

Research

JoVE Journal

Medicine

14.9K vues.  Providence Hospital and Medical Centers. La cholestase est une condition clinique communément rencontrés par les deux chirurgiens et les gastroentérologues. Création d'un modèle de rat cholestatique réversible peut être difficile compte tenu de la taille plus petite et unique anatomie hepatopancreatobiliary chez le rat. Cet article démontre la vidéo de création d'un modèle cholestatique réversible.

Vidéo: Creation of Reversible Cholestatic Rat Model

Ascending Aortic Constriction in Rats for Creation of Pressure Overload Cardiac Hypertrophy Model

Ascending aortic constriction is the most common and successful surgical model for creating pressure overload induced cardiac hypertrophy and heart failure. Here, we describe a detailed surgical procedure for creating pressure overload and cardiac hypertrophy in rats by constriction of the ascending aorta using a small metallic clip. After anesthesia, the trachea is intubated by inserting a cannula through a half way incision made between two cartilage rings of trachea. Then a skin incision is made at the level of the second intercostal space on the left chest wall and muscle layers are cleared to locate the ascending portion of aorta. The ascending aorta is constricted to 50&#8211;60% of its original diameter by application of a small sized titanium clip. Following aortic constriction, the second and third ribs are approximated with prolene sutures. The tracheal cannula is removed once spontaneous breathing was re-established. The animal is allowed to recover on the heating pad by gradually lowering anesthesia. The intensity of pressure overload created by constriction of the ascending aorta is determined by recording the pressure gradient using trans-thoracic two dimensional Doppler-echocardiography. Overall this protocol is useful to study the remodeling events and contractile properties of the heart during the gradual onset and progression from compensated cardiac hypertrophy to heart failure stage.

We describe a stepwise procedure for creating pressure overload and left ventricular hypertrophy in Wistar rats by constriction of the ascending aorta using a small metallic clip. This model is extensively used for studying remodeling changes during cardiac hypertrophy and for identifying and evaluating strategies for regression of such changes.

Aortique ascendant constriction chez les rats pour la création de la surcharge de pression hypertrophie cardiaque Modèle

Ascending aortic constriction is the most common and successful surgical model for creating pressure overload induced cardiac hypertrophy and heart ...

Recherche

Médecine

A Murine Model of Irreversible and Reversible Unilateral Ureteric Obstruction

Obstruction of the kidney may affect native or transplanted kidneys and results in kidney injury and scarring. Presented here is a model of obstructive nephropathy induced by unilateral ureteric obstruction (UUO), which can either be irreversible (UUO) or reversible (R-UUO). In the irreversible UUO model, the ureter may be obstructed for variable periods of time in order to induce increasingly severe renal inflammation and interstitial fibrotic scarring. In the reversible R-UUO model the ureter is obstructed to induce hydronephrosis, tubular dilation and inflammation. After a suitable period of time the ureteric obstruction is then surgically reversed by anastomosis of the severed previously obstructed ureter to the bladder in order to allow complete decompression of the kidney and restoration of urinary flow to the bladder. The irreversible UUO model has been used to investigate various aspects of renal inflammation and scarring including the pathogenesis of disease and the testing of potential anti-inflammatory or anti-fibrotic therapies. The more challenging model of R-UUO has been used by some investigators and does offer significant research potential as it allows the study of inflammatory and immune processes and tissue remodeling in an injured and scarred kidney following the removal of the injurious stimulus. As a result, the R-UUO model offers investigators the opportunity to explore the resolution of kidney inflammation together with key aspects of tissue repair. These experimental models are of relevance to human disease as patients often present with obstruction of the renal tract that requires decompression and are commonly left with significant residual kidney impairment that has no current treatment options and may lead to eventual end stage kidney failure.

The murine model of irreversible unilateral ureteric obstruction (UUO) is presented together with the model of reversible UUO in which the ureteric obstruction is relieved by anastomosis of the severed ureter into the bladder. These models enable the study of renal inflammation and scarring as well as tissue remodeling.

Un modèle murin d&#39;irréversible et réversible unilatérale obstruction urétérale

Obstruction of the kidney may affect native or transplanted kidneys and results in kidney injury and scarring. Presented here is a model of obstructive ...

Creation of Abdominal Adhesions in Mice

Abdominal adhesions consist of fibrotic tissue that forms in the peritoneal space in response to an inflammatory insult, typically surgery or intraabdominal infection. The precise mechanisms underlying adhesion formation are poorly understood. Many compounds and physical barriers have been tested for their ability to prevent adhesions after surgery with varying levels of success. The mouse and rat are important models for the study of abdominal adhesions. Several different techniques for the creation of adhesions in the mouse and rat exist in the literature. Here we describe a protocol utilizing abrasion of the cecum with sandpaper and sutures placed in the right abdominal sidewall. The mouse is anesthetized and the abdomen is prepped. A midline laparotomy is created and the cecum is identified. Sandpaper is used to gently abrade the surface of the cecum. Next, several figure-of-eight sutures are placed into the peritoneum of the right abdominal sidewall. The abdominal cavity is irrigated, a small amount of starch is applied, and the incision is closed. We have found that this technique produces the most consistent adhesions with the lowest mortality rate.

Abdominal adhesions that form after surgery are a major cause of pain, infertility, and hospitalization and reoperation for small bowel obstruction. Our surgical procedure for creating abdominal adhesions in mice is a reliable tool to study the mechanisms underlying the formation of adhesions.

Création d&#39;abdominaux adhérences chez la souris

Abdominal adhesions consist of fibrotic tissue that forms in the peritoneal space in response to an inflammatory insult, typically surgery or ...

Creation and Transplantation of an Adipose-derived Stem Cell (ASC) Sheet in a Diabetic Wound-healing Model

Artificial skin has achieved considerable therapeutic results in clinical practice. However, artificial skin treatments for wounds in diabetic patients with impeded blood flow or with large wounds might be prolonged. Cell-based therapies have appeared as a new technique for the treatment of diabetic ulcers, and cell-sheet engineering has improved the efficacy of cell transplantation. A number of reports have suggested that adipose-derived stem cells (ASCs), a type of mesenchymal stromal cell (MSC), exhibit therapeutic potential due to their relative abundance in adipose tissue and their accessibility for collection when compared to MSCs from other tissues. Therefore, ASCs appear to be a good source of stem cells for therapeutic use. In this study, ASC sheets from the epididymal adipose fat of normal Lewis rats were successfully created using temperature-responsive culture dishes and normal culture medium containing ascorbic acid. The ASC sheets were transplanted into Zucker diabetic fatty (ZDF) rats, a rat model of type 2 diabetes and obesity, that exhibit diminished wound healing. A wound was created on the posterior cranial surface, ASC sheets were transplanted into the wound, and a bilayer artificial skin was used to cover the sheets. ZDF rats that received ASC sheets had better wound healing than ZDF rats without the transplantation of ASC sheets. This approach was limited because ASC sheets are sensitive to dry conditions, requiring the maintenance of a moist wound environment. Therefore, artificial skin was used to cover the ASC sheet to prevent drying. The allogenic transplantation of ASC sheets in combination with artificial skin might also be applicable to other intractable ulcers or burns, such as those observed with peripheral arterial disease and collagen disease, and might be administered to patients who are undernourished or are using steroids. Thus, this treatment might be the first step towards improving the therapeutic options for diabetic wound healing.

Creation and Transplantation of an Adipose-derived Stem Cell ASC Sheet in a Diabetic Wound-healing Model

Adipose-derived stem cells (ASCs) are easily isolated and harvested from the fat of normal rats. ASC sheets can be created using cell-sheet engineering and can be transplanted into Zucker diabetic fatty rats exhibiting full-thickness skin defects with exposed bone and then covered with a bilayer of artificial skin.

Création et la Transplantation d’une feuille adipeux dérivées de cellules souches (ASC) dans un modèle de cicatrisation diabétique

Artificial skin has achieved considerable therapeutic results in clinical practice. However, artificial skin treatments for wounds in diabetic patients ...

Creation of a Rodent Model of Abdominal Aortic Aneurysm by Blocking Adventitial Vasa Vasorum Perfusion

The adventitial vasa vasorum (VV) provides oxygen and nourishment to the aortic wall. Hypoxia in the aortic wall can cause enlarged abdominal aortic aneurysms (AAAs). This article introduces and describes a standard protocol used to induce AAAs through adventitial VV hypoperfusion created with a combination of polyurethane catheter insertion into the aortic lumen and suture ligation of the infrarenal abdominal aorta.
The protocol involves the use of male rats weighing 300-400 g, which are provided food and water ad libitum. After laparotomy with a ventral midline abdominal incision, exfoliation of the aorta is performed, which blocks blood flow from the perivascular tissue. Aortotomy involving a small incision adjacent to the renal artery branches is performed, and a polyurethane catheter is inserted using an 18-gauge indwelling needle. After repairing the incision, tight ligation of the aorta over the catheter blocks VV blood flow from the proximal direction through the aortic wall without disturbing the aortic blood flow. This technique can induce an AAA with progressive aortic dilatation.
The greatest benefit of this model is that VV hypoperfusion causes tissue hypoxia and the development of an infrarenal AAA, which has morphological and pathological characteristics similar to those of a human AAA.

Polyurethane catheter insertion into the aortic lumen and suture ligation of the aorta induce chronic hypoxia due to hypoperfusion of the adventitial vasa vasorum. This article describes a novel animal model of abdominal aortic aneurysm (AAA) with characteristics similar to those of AAA in humans.

Création d’un modèle de rongeur d’anévrisme de l’aorte abdominale en bloquant adventitiels Vasa Vasorum Perfusion

The adventitial vasa vasorum (VV) provides oxygen and nourishment to the aortic wall. Hypoxia in the aortic wall can cause enlarged abdominal aortic ...

Isometric Contractility Measurement of the Mouse Mesenteric Artery Using Wire Myography

The wire myograph technique is used to assess the contractility of vascular smooth muscles in response to depolarization, GPCR agonists/inhibitors and drugs. It is widely used in many studies on the physiological functions of vascular smooth muscle, the pathogenesis of vascular diseases such as hypertension, and the development of smooth muscle relaxant drugs. The mouse is a widely used model animal with a large pool of disease models and genetically modified strains. We introduced this method to measure the isometric contraction of mouse mesenteric artery in detail. A 1.4-mm segment of mouse mesenteric resistance artery was isolated and mounted on a myograph chamber by passing two steel wires through its lumen. After equilibration and normalization steps, the vessel segment was potentiated by a high-K+ solution twice prior to the contraction assay. As an example of the application of this method in drug development, we measured the relaxant effect of a novel natural substance, neoliensinine, isolated from a Chinese herb, embryos of the lotus seed (Nelumbo nucifera Gaertn.) on mouse mesenteric arteries. The vessel segments mounted on the myograph chamber were stimulated with a high-K+ solution. When the force tension reached a stable sustained phase, cumulative doses of neoliensinine were added to the chamber. We found that neoliensinine had a dose-dependent relaxant effect on smooth muscle contraction, thus suggesting that it bears potential activity against hypertension. In addition, as the vessel segment can survive at least 4 hours after mounting and maintain contractility induced by the high-K+ solution for many times, we suggest that the wire myograph system may be used for the time-consuming process of drug screening.

The wire myograph technique is used to investigate vascular smooth muscle functions and screen new drugs. We report a detailed protocol for measuring the isometric contractility of the mouse mesenteric artery and for screening new relaxants of vascular smooth muscle.

Mesure de la contractilité isométrique de l’artère mésentérique de souris à l’aide de fil myographie

The wire myograph technique is used to assess the contractility of vascular smooth muscles in response to depolarization, GPCR agonists/inhibitors and ...

Creation of Colonic Anastomosis in Mice

Intestinal anastomoses are commonly performed in both elective and emergent operations. Even so, anastomotic leaks are a highly feared complications of colonic surgeries and can occur in up to 26% of surgical anastomoses, with mortality being up to 39% for patients with such a leak. Currently, there remains a paucity of data detailing the cellular mechanisms of anastomotic healing. Devising preventative strategies and treatment modalities for anastomotic leak could be greatly potentiated by a better understanding of appropriate anastomotic healing.
A murine model is ideal as previous studies have shown that the murine anastomosis is the most clinically similar to the human case as compared with other animal models. We offer an easily reproducible murine model of colonic anastomosis in mice that will allow for further illustration of anastomotic healing.

Anastomotic leak or breakdown after surgery is a major cause of postoperative morbidity and mortality. Our surgery for creating a colonic anastomosis is a reliable and reproducible method for studying the healing mechanisms of anastomoses.

Création de l’anastomose du côlon chez la souris

Intestinal anastomoses are commonly performed in both elective and emergent operations. Even so, anastomotic leaks are a highly feared complications of ...

A Reversible Silicon Oil-Induced Ocular Hypertension Model in Mice

Elevated intraocular pressure (IOP) is a well-documented risk factor for glaucoma. Here we describe a novel, effective method for consistently inducing stable IOP elevation in mice that mimics the post-operative complication of using silicone oil (SO) as a tamponade agent in human vitreoretinal surgery. In this protocol, SO is injected into the anterior chamber of the mouse eye to block the pupil and prevent inflow of aqueous humor. The posterior chamber accumulates aqueous humor and this in turn increases the IOP of the posterior segment. A single SO injection produces reliable, sufficient, and stable IOP elevation, which induces significant glaucomatous neurodegeneration. This model is a true replicate of secondary glaucoma in the eye clinic. To further mimic the clinical setting, SO can be removed from the anterior chamber to reopen the drainage pathway and allow inflow of aqueous humor, which is drained through the trabecular meshwork (TM) at the angle of the anterior chamber. Because IOP quickly returns to normal, the model can be used to test the effect of lowering IOP on glaucomatous retinal ganglion cells. This method is straightforward, does not require special equipment or repeat procedures, closely simulates clinical situations, and may be applicable to diverse animal species. However, minor modifications may be required.

Here, we present a protocol to induce ocular hypertension and glaucomatous neurodegeneration in mouse eyes by intracameral injection of silicone oil and the procedure for silicone oil removal from the anterior chamber to return elevated intraocular pressure to normal.

Un modèle d'hypertension oculaire induite par l'huile de silicium réversible chez les souris

Elevated intraocular pressure (IOP) is a well-documented risk factor for glaucoma. Here we describe a novel, effective method for consistently inducing ...

Acupuncture in a Rat Model of Asthma

A high platform can fix rats without restriction and completely expose the acupoints on the back during acupuncture manipulation. This article describes methods for the fabrication of the high platform, establishes a rat model of asthma and measures changes in respiratory function using a noninvasive and real-time whole-body plethysmography (WBP) system.

Acupuncture dans un modèle de rat de l’asthme

A high platform can fix rats without restriction and completely expose the acupoints on the back during acupuncture manipulation. This article describes ...

Development of a Uterosacral Ligament Suspension Rat Model

Pelvic organ prolapse (POP) is a common pelvic floor disorder (PFD) with the potential to significantly impact a woman's quality of life. Approximately 10%-20% of women undergo pelvic floor repair surgery to treat prolapse in the United States. PFD cases result in an overall $26.3 billion annual cost in the United States alone. This multifactorial condition has a negative impact on the quality of life and yet the treatment options have only dwindled in the recent past. One common surgical option is uterosacral ligament suspension (USLS), which is typically performed by affixing the vaginal vault to the uterosacral ligament in the pelvis. This repair has a lower incidence of complications compared to those with mesh augmentation, but is notable for a relatively high failure rate of up to 40%. Considering the lack of standard animal models to study pelvic floor dysfunction, there is an urgent clinical need for innovation in this field with a focus on developing cost-effective and accessible animal models. In this manuscript, we describe a rat model of USLS involving a complete hysterectomy followed by fixation of the remaining vaginal vault to the uterosacral ligament. The goal of this model is to mimic the procedure performed on women to be able to use the model to then investigate reparative strategies that improve the mechanical integrity of the ligament attachment. Importantly, we also describe the development of an in situ tensile testing procedure to characterize interface integrity at chosen time points following surgical intervention. Overall, this model will be a useful tool for future studies that investigate treatment options for POP repair via USLS.

Pelvic organ prolapse affects millions of women worldwide and yet some common surgical interventions have failure rates as high as 40%. The lack of standard animal models to investigate this condition impedes progress. We propose the following protocol as a model for uterosacral ligament suspension and in vivo tensile testing.

Développement d’un modèle de ligament utéros-sacré en suspension chez le rat

Pelvic organ prolapse (POP) is a common pelvic floor disorder (PFD) with the potential to significantly impact a woman's quality of life. Approximately ...