MC וAVdP הם דוקטורנטים נתמכים על ידי מענקים מהמכון לקידום החדשנות באמצעות מדע וטכנולוגיה בפלנדריה (IWT פלנדריה). JT מחזיק מלגה חלקית מחקר קלינית (כור) מUZ לובן. DV הוא דוקטורט בחור נתמך על ידי מענק מKU לובן, DBOF/10/062. MMdC הוא דוקטורט בחור נתמך על ידי מענק מConselho Nacional de Pesquisa הדואר Desenvolvimento (CNPq) וארסמוס מונדוס. מחקר מומן על ידי IWT פלנדריה, על ידי המענק מהקהילה האירופית דימי (LSHB-CT-2005-512146) ועל ידי בחי מולקולרי הדמית מחקר קבוצה (IMIR) מKU הלובן. ברצוננו להודות Core הווקטור UPenn נוסד על ידי ג&#39;יימס מ &#39;וילסון למתנת סוגם של AAV6.2 אריזת פלסמיד לייצור וקטור rAAV.

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Metab. 69, 269-276 (2000).</li><li>Carlon, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Efficient+gene+transfer+into+the+mouse+lung+by+fetal+intratracheal+injection+of+rAAV2/6.2.">Efficient gene transfer into the mouse lung by fetal intratracheal injection of rAAV2/6.2.</a> Mol. Ther. 18, 2130-2138 (2010).</li><li>Schmiedl, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Lipopolysaccharide-induced+injury+is+more+pronounced+in+fetal+transgenic+ErbB4-deleted+lungs.">Lipopolysaccharide-induced injury is more pronounced in fetal transgenic ErbB4-deleted lungs.</a> Am. J. Physiol. Lung Cell Mol Physiol. 301, L490-L499 (2011).</li><li>Buckley, S. 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אין ניגודי האינטרסים הכריזו.

שלבים קריטיים <ul style=";text-align:right;direction:rtl"><li style=";text-align:right;direction:rtl"> עכבר הזן שבחרנו לעבוד עם עכברים הוא NMRI כי יש להם מספר שופע של גורים (גודל ממוצע המלטה 14.4 ± 1.8, נתונים שלו), תסבול התערבויות היטב ויש להם מאפיינים אימהיים טובים. </li><li style=";text-align:right;direction:rtl"> הצבת מחרוזת הארנק ?...

<table border="1" style=";text-align:right;direction:rtl"><tbody><tr><td> שם המגיב </td><td> חברה </td><td> מספר קטלוגים </td><td> תגובות (אופציונלי) </td></tr><tr><td> עכברי NMRI </td><td> ז&#39;אנווייר, Le Genest סנט Isle, צרפת </td><td></td><td></td></tr><tr><td> Isoflurane </td><td> Isoba, Intervet / Schering-Plough לבריאות בעלי חיים, מילטון קיינס, אנגליה </td><td></td><td></td></tr><tr><td> Prolene 6-0 </td><td> Ethicon, גרוט Bijgaarden, בלגיה </td><td></td><td></td></tr><tr><td> Vicryl 5-0 </td><td> Ethicon, גרוט Bijgaarden, בלגיה </td><td></td><td></td></tr><tr><td> מזרק 50 μl המילטון זכוכית, הדגם 1710.5 TLLX SYR </td><td> המילטון, רינו, NV, ארצות הברית </td><td> 5495-20 </td><td></td></tr><tr><td> מחט 30G חדה </td><td> המילטון, רינו, NV, ארצות הברית </td><td> 7762-03 </td><td></td></tr><tr><td> 2% xylocaine </td><td> חברת AstraZeneca, Zoetermeer, הולנד </td><td></td><td></td></tr></tbody></table>

a novel surgical approach for intratracheal administration of bioactive agents in a fetal mouse model

אספקת ריאתי בהריון של תאים, גנים או סוכנים תרופתיים יכולה לספק את הבסיס לאסטרטגיות טיפוליות חדשות למגוון רחב של מחלות גנטיות ונרכשות. חוץ ממומים מולדים או תורשתיים עם הדרישה לביטוי לטווח הארוך של הגן נמסר, כמה תנאים סביב לידה שאינן תורשתיים-, שבו ביטוי גנים לטווח קצר או התערבות תרופתית מספיק כדי להשיג השפעות טיפוליות, נחשבים כאינדיקציות עתידיות אפשריות לכך סוג של גישה. מחל מועמד ליישום של טיפול טרום לידתי לטווח קצר יכולות להיות מחסור בילוד הזמני של החלבון הפעיל השטח B גורם 1,2 יילודי מצוקה נשימתית תסמונת או פציעות hyperoxic של ריאות יילודי 3. מחל מועמד לתיקון טיפולי קבוע הן סיסטיק פיברוזיס (CF) 4, וריאנטים גנטיים של ליקויים פעילים שטח 5 ו חסר α1-antitrypsin 6. &lt;כיתת p = &quot;jove_content&quot;&gt; באופן כללי, יתרון חשוב של טיפול גנטי טרום לידתי היא היכולת להתחיל התערבות טיפולית בשלב מוקדם בפיתוח, באו אפילו לפני ביטויים קליניים של המטופל, ובכך למנוע ניזק בלתי הפיך לאדם. בנוסף, איברי עובר יש קצב תרבות תאים מוגבר בהשוואה לאיברים למבוגרים, אשר עלול לאפשר גנטי יעילים יותר או העברת תאי גזע לעובר. יתר על כן, במסירת גן הרחם מבוצע כאשר המערכת החיסונית של האדם היא לא לגמרי בוגרת. לכן, השתלה של תאים או בתוספי Heterologous של חלבון שאינו תפקודי או נעדר עם גרסה נכונה לא אמורה לגרום לרגישות חיסונית התא, הווקטור או מוצר transgene, שלאחרונה הוכח במקרה של טיפולים סלולריים והן גנטיים 7 . במחקר הנוכחי, חוקרים בחן את הפוטנציאל ישירות לקנה הנשימה למקד העוברי בעכבר מ &#39;אודל. הליך זה נמצא בשימוש במודלים של בעלי חיים גדולים יותר כגון ארנבות וכבשים 8, ואפילו בהגדרה קלינית 9, אך עד כה לא בוצע קודם לכן במודל עכבר. כאשר לומדים את הפוטנציאל של ריפוי גנטי עוברי לטיפול במחלות גנטיות כגון CF, מודל העכבר הוא מאוד שימושי כהוכחה של המושג ראשון בגלל הזמינות הרחבה של זנים שונים מהונדסים לעכבר, embryogenesis המתועדים היטב וההתפתחות עוברת, פחות מחמירים תקנות אתיות, הריון קצר וגודל ההמלטה גדול. דרכי גישה שונה כבר תאר למקד ריאות מכרסם העובריות, כולל הזרקה תוך 10-12 מי שפירה, הזרקה (אולטרסאונד מונחה) intrapulmonary 13,14 ועירוי לוריד לתוך כלי צק חלמון 15,16 או וריד טבור 17. הליך הכירורגים החדשני שלנו מאפשר לחוקרים להזריק את הסוכן של בחירה ישירה לקנה נשימת העכבר העוברי המאפשרלאספקה ​​יעילה יותר לדרכי הנשימה מטכניקות קיימות 18.

Watch this Scientific Journal Video about A Novel Surgical Approach for Intratracheal Administration of Bioactive Agents in a Fetal Mouse Model at JoVE.com

A Novel Surgical Approach for Intratracheal Administration of Bioactive Agents in a Fetal Mouse Model

פתחנו גישה ניתוחית חדשנית לממשל intratracheal של סוכני יו לעובר העכבר. מסלול המשלוח הוא יעיל יותר במיקוד ריאות העכבר העובריות מהזרקה תוך מי השפירה בשימוש נפוץ. הליך זה עד כה לא תואר במודל של עכברים.

גישה ניתוחית חדשנית למנהל Intratracheal של סוכני יו במודל של עכברים עוברי

Prenatal pulmonary delivery of cells, genes or pharmacologic agents could provide the basis for new therapeutic strategies for a variety of genetic and ...

a-novel-surgical-approach-for-intratracheal-administration-bioactive

Universidad de Cartagena UDEC

Research

JoVE Journal

Medicine

16.4K Views.  KU Leuven. פתחנו גישה ניתוחית חדשנית לממשל intratracheal של סוכני יו לעובר העכבר. מסלול המשלוח הוא יעיל יותר במיקוד ריאות העכבר העובריות מהזרקה תוך מי השפירה בשימוש נפוץ. הליך זה עד כה לא תואר במודל של עכברים.

Video: A Novel Surgical Approach for Intratracheal Administration of Bioactive Agents in a Fetal Mouse Model

Endotracheal Intubation in Mice via Direct Laryngoscopy Using an Otoscope

Mice, both wildtype and transgenic, are the principal mammalian model in biomedical research currently. Intubation and mechanical ventilation are necessary for whole animal experiments that require surgery under deep anesthesia or measurements of lung function. Tracheostomy has been the standard for intubating the airway in these mice to allow mechanical ventilation. Orotracheal intubation has been reported but has not been successfully used in many studies because of the substantial technical difficulty or a requirement for highly specialized and expensive equipment. Here we report a technique of direct laryngoscopy using an otoscope fitted with a 2.0 mm speculum and using a 20 G&#160;intravenous catheter as an endotracheal tube. We have used this technique extensively and reliably to intubate and conduct accurate assessments of lung function in mice. This technique has proven safe, with essentially no animal loss in experienced hands. Moreover, this technique can be used for repeated studies of mice in chronic models.

Endotracheal Intubation in Mice via Direct Laryngoscopy Using an Otoscope

We have developed a simple, reliable, and relatively inexpensive method for endotracheal intubation in mice via direct laryngoscopy using an otoscope with a 2.0 mm speculum. This technique is atraumatic and can be used for repeated measurements in chronic experiments. We find it superior to tracheostomy or previously reported nonsurgical techniques.

Endotracheal אינטובציה בעכברים<em&gt; דרך</em&gt; ישיר laryngoscopy באמצעות אוטוסקופ

Mice, both wildtype and transgenic, are the principal mammalian model in biomedical research currently. Intubation and mechanical ventilation are ...

Noninvasive Intratracheal Intubation to Study the Pathology and Physiology of Mouse Lung

The use of a model that mimics the condition of lung diseases in humans is critical for studying the pathophysiology and/or etiology of a particular disease and for developing therapeutic intervention. With the increasing availability of knockout and transgenic derivatives, together with a vast amount of genetic information, mice provide one of the best models to study the molecular mechanisms underlying the pathology and physiology of lung diseases. Inhalation, intranasal instillation, intratracheal instillation, and intratracheal intubation are the most widely used techniques by a number of investigators to administer materials of interest to mouse lungs. There are pros and cons for each technique depending on the goals of a study. Here a noninvasive intratracheal intubation method that can directly deliver exogenous materials to mouse lungs is presented. This technique was applied to administer bleomycin to mouse lungs as a model to study pulmonary fibrosis.

The use of a model that mimics the condition of lung diseases in humans is critical for studying the pathophysiology and/or etiology of a particular disease and for developing therapeutic intervention. Here a noninvasive intratracheal intubation method that can directly deliver exogenous materials to mouse lungs is presented.

פולשנית Intratracheal אינטובציה ללמוד פתולוגיה והפיזיולוגיה של עכבר ריאות

The use of a model that mimics the condition of lung diseases in humans is critical for studying the pathophysiology and/or etiology of a particular ...

Intra-tracheal Administration of Haemophilus influenzae in Mouse Models to Study Airway Inflammation

Here, we describe a detailed procedure to efficiently and directly deliver Haemophilus influenzae into the lower respiratory tracts of mice. We demonstrate the procedure for preparing H. influenzae inoculum, intra-tracheal instillation of H. influenzae into the lung, collection of broncho-alveolar lavage fluid (BALF), analysis of immune cells in the BALF, and RNA isolation for differential gene expression analysis. This procedure can be used to study the lung inflammatory response to any bacteria, virus or fungi. Direct tracheal instillation is mostly preferred over intranasal or aerosol inhalation procedures because it more efficiently delivers the bacterial inoculum into the lower respiratory tract with less ambiguity.

Intra-tracheal Administration of Haemophilus influenzae in Mouse Models to Study Airway Inflammation

We demonstrate the procedure for intra-tracheal inoculation of Haemophilus influenzae into the lower respiratory tracts of mice. This is a very useful tool to study signaling pathways that regulate airway inflammation in mouse models.

מנהל Intra-קנה נשימה של<em&gt; אינפלואנזה המופילוס</em&gt; בעכברי מודל לחקר Airway דלקת

Here, we describe a detailed procedure to efficiently and directly deliver Haemophilus influenzae into the lower respiratory tracts of mice. We ...

Immunology and Infection

Transuterine Fetal Tracheal Occlusion Model in Mice

Fetal tracheal occlusion (TO), an established treatment modality, promotes fetal lung growth and survival in severe congenital diaphragmatic hernia (CDH). Following TO, retention of the secreted epithelial fluid increases luminal pressure and induces lung growth. Various animal models have been defined to understand the pathophysiology of CDH and TO. All have their own advantages and disadvantages such as the difficulty of the technique, the size of the animal, cost, high mortality rates, and the availability of genetic tools. Herein, a novel transuterine model of murine fetal TO is described. Pregnant mice were anesthetized, and the uterus exposed via a midline laparotomy. The trachea of selected fetuses were ligated with a single transuterine suture placed behind the trachea, one carotid artery, and one jugular vein. The dam was closed and allowed to recover. Fetuses were collected just before parturition. Lung to body weight ratio in TO fetuses was higher than that in control fetuses. This model provides researchers with a new tool to study the impact of both TO and increased luminal pressure on lung development.

Various animal models of congenital diaphragmatic hernia and fetal tracheal occlusion present advantages and disadvantages regarding ethical issues, cost, surgical difficulty, size, survival rates, and availability of genetic tools. This model provides a new tool to study the impact of both tracheal occlusion and increased luminal pressure on lung development.

מודל חסימת קנה הנשימה העוברי הטרנס-רחמי בעכברים

Fetal tracheal occlusion (TO), an established treatment modality, promotes fetal lung growth and survival in severe congenital diaphragmatic hernia (CDH). ...

Developmental Biology

An Improved Method for Rapid Intubation of the Trachea in Mice

Despite some anatomical and physiological differences, mouse models continue to be an essential tool for studying human lung disease. Bleomycin toxicity is a commonly used model to study both acute lung injury and fibrosis, and multiple methods have been developed for administering bleomycin (and other toxic agents) into the lungs. However, many of these approaches, such as transtracheal instillation, have inherent drawbacks, including the need for strong anesthetics and survival surgery. This paper reports a quick, reproducible method of intratracheal intubation that involves mild inhaled anesthesia, visualization of the trachea, and the use of a surrogate spirometer to confirm exposure. As a proof of concept, 8-12 week old C57BL/6 mice were administered either 2.0 U/kg of bleomycin or an equivalent volume of PBS, and both damage and fibrotic endpoints were measured post-exposure. This procedure allows researchers to treat a large cohort of mice in a relatively short period with little expense and minimal post-procedure care.

This article presents a rapid and simple method for administering bleomycin directly into the mouse trachea via intubation. Key advantages of this method are that it is highly reproducible, easy to master, and does not require specialized equipment or lengthy recovery times.

שיטה משופרת עבור אינטובציה מהירה של קנה הנשימה של עכברים

Despite some anatomical and physiological differences, mouse models continue to be an essential tool for studying human lung disease. Bleomycin toxicity ...

Direct Intrabronchial Administration to Improve the Selective Agent Deposition Within the Mouse Lung

Intratracheal (IT) administration of experimental agents is an essential technique in murine models of diffuse lung diseases, such as bleomycin-induced pulmonary fibrosis.&#160; However, distribution of intratracheally-administered agents to the distal mouse lung is often asymmetric, with lung parenchymal concentrations increased in the smaller (but equally accessible) left lung of the mouse.&#160; Described in this report is a novel intrabronchial (IB) approach to cannulate the left and/or right lungs of living mice non-operatively.&#160; It is also demonstrated how this approach can be used to selectively administer agents to one lung or adapted (via dose-adjusted IB delivery) to improve the left-right symmetry of lung delivery of experimental agents, thereby improving models of diffuse lung disease such as bleomycin-induced pulmonary fibrosis.

Intratracheal (IT) administration of experimental agents in mice often results in asymmetric delivery to the distal lungs.&#160; In this report, we describe a direct intrabronchial (IB) approach to cannulate each lung in living mice non-operatively.&#160; This approach can be used to selectively administer agents to one lung or may be adapted to improve the symmetric agent delivery to both lungs.

מינהל הארגון הישיר כדי לשפר את הסוכן הסלקטיבי התצהיר בתוך הריאה של העכבר

Intratracheal (IT) administration of experimental agents is an essential technique in murine models of diffuse lung diseases, such as bleomycin-induced ...

A Minimally Invasive Method for Intratracheal Instillation of Drugs in Neonatal Rodents to Treat Lung Disease

Treatment of neonatal rodent with drugs instilled directly into the trachea could serve as a valuable tool to study the impact of a locally administered drug. This has direct translational impact because surfactant and drugs are administered locally into the lungs. Though the literature has many publications describing minimally invasive transoral intubation of adult mice and rats in therapeutic experiments, this approach in neonatal rat pups is lacking. The small size of orotracheal region/pharynx in the pups makes visualization of laryngeal lumen (vocal cords) difficult, contributing to the variable success rate of intratracheal drug delivery. We hereby demonstrate effective oral intubation of neonatal rat pup - a technique that is non-traumatic and minimally-invasive, so that it can be used for serial administration of drugs. We used an operating otoscope with an illumination system and a magnifying lens to visualize the tracheal opening of the rat neonates. The drug is then instilled using a 1 mL syringe connected to a pipette tip. The accuracy of the delivery method was demonstrated using Evans blue dye administration. This method is easy to get trained in and could serve as an effective way to instill drugs into trachea. This method could also be used for administration of inoculum or agents to simulate disease conditions in animals and, also, for cell-based treatment strategies for various lung diseases.

This technique of instilling drugs directly into the trachea of neonatal rodents is important in studying the impact of locally administered drugs or biologicals on neonatal lung diseases. Additionally, this method can also be used for inducing lung injury in animal models.

שיטה זעיר פולשנית להחדרת תרופות תוך-רחמיות במכרסמים יילודים לטיפול במחלות ריאה

Treatment of neonatal rodent with drugs instilled directly into the trachea could serve as a valuable tool to study the impact of a locally administered ...

Simplifying Transcutaneous Intratracheal Drug Delivery in the Newborn Preterm Rabbit

Intratracheal (IT) drug delivery allows the direct delivery of pharmaceutical substances to the lung, maximizing potential pulmonary benefit and minimizing systemic drug exposure. The transcutaneous technique is simple and allows for the IT delivery of substances to the lung of prematurely born rabbits shortly after birth. Newborn pups are anesthetized with inhaled Isoflurane before being placed in a supine position with the neck extended. The larynx is identified and stabilized before transcutaneous placement of a 26-gauge (G) catheter into the trachea. Following catheterization of the trachea, a 30 G blunt needle attached to a Hamilton syringe is introduced into the IT catheter and is used for delivering a precise volume into the trachea during spontaneous respiration. After the IT injection is completed, the needle and catheter are withdrawn, and the pup is allowed to recover from anesthesia. Transcutaneous IT injection delivers a large proportion of the injected substance to the lung, with the majority remaining in the lung 3 hours after the intervention. The injections are well tolerated from the day of birth and can be repeated for multiple consecutive days without influencing survival. This technique can be used to investigate the effect of pharmaceutical agents on lung development and in the prevention of neonatal lung injury in preterm rabbits.

Transcutaneous intratracheal injection allows for effective intrapulmonary drug delivery during spontaneous respiration. Single and multiple injections are well tolerated with no effect on survival. The technique is simple to perform and can examine the effect of substances on lung development and the prevention of lung injury in newborn rabbits.

Intratracheal (IT) drug delivery allows the direct delivery of pharmaceutical substances to the lung, maximizing potential pulmonary benefit and ...

Noninvasive Intratracheal Lipopolysaccharide Instillation in Mice

The acute lung injury (ALI) mouse model induced by lipopolysaccharide (LPS) or endotoxin is still among the most commonly used models in animal studies of acute lung injury or acute inflammation. The current most commonly used methods in acute lung injury mouse models are an intraperitoneal injection of LPS and tracheostomy for the tracheal infusion of LPS. However, the former method lacks lung targeting and damages other organs, and the latter method induces operative trauma, infection risk, and a low survival rate. Here, we recommend a noninvasive oropharyngeal endotracheal intubation method for LPS instillation in mice. In this method, LPS is noninvasively introduced into the trachea through the oropharyngeal cavity to be instilled into the lung with the help of an apparatus for endotracheal intubation. This method not only assures lung targeting but also avoids damage and the risk of death in the animals. We expect that this approach will become widely used in the field of acute lung injury.

Here, we propose a protocol for intratracheal lipopolysaccharide (LPS) delivery via noninvasive oropharyngeal endotracheal intubation. This method minimizes the trauma of the surgical procedure for the animal and accurately delivers LPS to the trachea and then to the lungs.

החדרת ליפופוליסכריד תוך טרכאלי לא פולשני בעכברים

The acute lung injury (ALI) mouse model induced by lipopolysaccharide (LPS) or endotoxin is still among the most commonly used models in animal studies of ...

Biology

Intrabronchial Delivery: A Technique to Administer an Experimental Agent Selectively Into a Mouse Lung

Source: Liao, S. et. al. <a href="https://jove.unicartagenaproxy.elogim.com/v/59450/direct-intrabronchial-administration-to-improve-selective-agent">Direct Intrabronchial Administration to Improve the Selective Agent Deposition Within the Mouse Lung</a>. J. Vis. Exp. (2019).
This video describes an intrabronchial approach to administer an experimental agent selectively into distal right and left lung. In the featured protocol, we will administer bleomycin intrabronchially into a mouse to obtain a better model for pulmonary fibrosis.

משלוח תוך סימפונות: טכניקה לניהול סוכן ניסיוני באופן סלקטיבי לתוך ריאה עכבר

Source: Liao, S. et. al. Direct Intrabronchial Administration to Improve the Selective Agent Deposition Within the Mouse Lung. J. Vis. Exp. (2019).
This ...

גישה ניתוחית חדשנית למנהל Intratracheal של סוכני יו במודל של עכברים עוברי

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Endotracheal אינטובציה בעכברים