Los autores desean agradecer el NINDS, FightSMA y Familias de SMA para el apoyo financiero. Segl con el apoyo de la formación NINDS subvención # 5T32NS077984-02.

Todos los procedimientos que figuran en el protocolo han sido aprobados Instituto de Uso de Animales y el comité de Atención (IACUC) de la Universidad Estatal de Ohio. 1. Preparación del espacio de trabajo <ol><li> Reunir hielo húmedo para anestesiar a las crías de ratón, una jaula vacía para segregar la presa de la litera, un microscopio de disección, una fuente de luz que se puede colocar en un ángulo a la inyección (uso de una fuente de luz en un 90 ° &#160; ángulo con el sitio de la inyección oscurece la vena), una superficie limpia para colocar el animal para la inyección, hisopos de algodón, 3/10 cc jeringa de insulina con 3/8 &quot;30 G aguja (uno por animal) y 1% de colorante azul de Evans ( hecho con tampón fosfato salino) solución (PBS) para la formación. </li><li> Retire la presa a una jaula separada, mientras que la manipulación de los cachorros. </li></ol> Procedimiento 2. Inyección <ol><li> Coloque una sola cría directamente en el hielo húmedo durante 30-60 segundos para anestesiar al animal. No deje tque los animales en el hielo demasiado tiempo debido a un riesgo de complicaciones relacionadas con la hipotermia, incluyendo la fibrilación ventricular, hipoxia tisular y acidosis metabólica. NOTA: Nuestra experiencia es que 30 a 60 segundos es suficiente para frenar los movimientos de las crías para permitir la inyección. Si se requiere anestesia más profunda, inhalantes tales como 1-2% de isoflurano pueden ser apropiados. </li><li> Mientras el animal está en el hielo, cargue la jeringa con 30 l de colorante azul de Evans. </li><li> Cuando el animal está completamente anestesiado, confirmado por la falta de movimiento en el hielo, mientras que todavía respiraba, moverse bajo el microscopio. Para una inyección diestro, enfrentar el hocico del animal a la derecha. Coloque el dedo índice izquierdo en el hocico y el caudal dedo medio izquierdo para el auricular para que el auricular está entre el índice y el dedo medio (Figura 1). </li><li> Examine justo anterior al brote del oído de un capilar superficial que se mueve cuando la piel se manipula. Este capilar no es el objetivo, sin embargoidentificación es importante para la identificación de la vena temporal. A continuación, busque un sombrío vena oscura inferior al capilar que permanece fijo independientemente de la posición de la piel. La vena temporal parece sombrío, corre dorsal a ventral, y se alimenta en la vena yugular (Figura 1). </li><li> Introduzca la vena temporal con la aguja de bisel hacia arriba. Si se inserta correctamente, es posible ver el bisel de la aguja se llenan de sangre a través de la piel. Luego presione el émbolo lenta y la nota de escaldado de la vena por el lado de la cara. </li><li> Deje que la aguja permanezca dentro de la vena por un 10-15 seg añadido para evitar el reflujo de la inyectante. </li></ol> 3. Post-inyección <ol><li> Después de una inyección adecuada, el cachorro debe ponerse azul casi de inmediato. Retire la aguja y el uso de fuerza suave para aplicar un hisopo de algodón para el sitio de inyección hasta que los coágulos de sangre. </li><li> Monitorear el cachorro en busca de signos de angustia. Deje que el cachorro 2-3 minutos para recuperarse y se vuelven a calentar, reconocer cuando el cachorro está consciente, de pie y en movimiento, antes de regresar a la jaula. Copa de las crías en las manos enguantadas del investigador para proporcionar calidez apropiada para ayudar en la recuperación si es necesario. Como alternativa, coloque una almohadilla eléctrica bajo la jaula para facilitar el calentamiento del cachorro inyectado. Generalmente después de una inyección de colorante azul de Evans, la eutanasia crías. No incluya tinte al inyectar el material de prueba. </li><li> Coloque el cachorro de nuevo en la jaula de alojamiento y asegúrese de que el cachorro se recubre con ropa de cama y / o nestlet para asegurar reaceptación por la represa. </li><li> Utilice una nueva jeringa y un hisopo de algodón para cada cachorro para mantener la esterilidad. </li></ol>

<ol>
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Los autores no tienen nada que revelar.

Entrega intravascular de agentes para el SNC o en todo el cuerpo es difícil en modelos murinos neonatales de la enfermedad. El protocolo descrito es una forma rápida, relativamente no invasiva para administrar por vía intravenosa soluciones en ratones recién nacidos con los requisitos mínimos de equipamiento. Aunque la vena cara temporal puede ser visto por el ojo desnudo, las inyecciones pueden tener una mayor precisión con el uso del microscopio y fuente de luz de fibra óptica, especialmente para un inyector si...

Entrega de la terapéutica en el sistema nervioso central (SNC) en modelos murinos de enfermedad pediátrica sigue siendo un reto. Los ratones que estados de enfermedad recién nacidos modelo son de tamaño insuficiente y el desarrollo inmaduro, y por lo tanto puede ser difícil de inyectar directamente en estructuras adecuadas en el SNC. Inyección intravascular de agentes terapéuticos es un método no invasivo, bien tolerado para entregar las células, fármacos, o vectores virales para todo el cuerpo, incluyendo el SNC y la retina 1-5 3,5-9. Publicaciones anteriores describen temporal inyección en la vena cara usando un transiluminador 10,11, sin un microscopio de disección 11,12, o que requieren dos personas para inyectar 10. La técnica de inyección descrito en este protocolo es ventajoso porque un solo individuo puede inyectar cachorros, y la fuente de luz para ver la vena temporal no está en contacto con el cachorro, eliminando la necesidad de cinta quirúrgica o la fijación de un cachorro a una superficie fijatal como un transiluminador 11. Entrega de adeno-asociado vector viral serotipo 9 (AAV9) en ratones produce sólida expresión en neuronas y astrocitos en todo el cerebro y la médula espinal (Figura 1). Entrega intravascular de vectores virales en la vena facial temporal superficial se ha utilizado de forma fiable en diversos estudios en ratones recién nacidos para tratar el trastorno neuromuscular pediátrica la atrofia muscular espinal (SMA) 2,4,13,14 y en última instancia el aumento de la vida útil de los ratones tratados. Inyección intravascular de ratones neonatales también apunta eficazmente el sistema nervioso periférico y los órganos periféricos (Figura 2). Después de la inyección de AAV, la transducción de ganglios de la raíz dorsal, hígado, corazón, músculo esquelético, pulmón, y el plexo mientérico de la tripa se ha observado 1,3,6,7,15. Transducción generalizada del sistema nervioso central y la periferia hace que este método de inyección ideal para enfermedades que requieren expresión global deun transgén, como la enfermedad de 16 y otra de almacenamiento lisosomal enfermedades de Gaucher, la enfermedad de 17,18 Batten y ceroid lipofuscinoses neuronales relacionados, el 19 y el síndrome de Bardet-Biedl, un trastorno multisistémico genética con la aparición de los síntomas que se producen en la primera infancia 20. Inyección intravascular en ratones neonatal también debe ser considerado como un nuevo método de enfermedades pediátricas de todo el sistema de modelado. Esta técnica ha sido traducida a los modelos animales más grandes 5,21 y la inyección intravascular ya existe como un método clínicamente aceptable de la entrega de la terapéutica. El actual protocolo describe un método simple y eficiente de suministro de agentes a ratones recién nacidos a través de la vena superficial cara temporal a más tardar el día postnatal 2. Inyección puede ser completado por una sola, practica individual y es bien tolerado por tanto las crías y las presas. Los cachorros experimentan angustia mínima y se recuperan rápidamente. Importantemente, la inyección exitosa resultará en la entrega global del agente administrado. Este protocolo es apropiado para la administración de vectores virales, agentes farmacéuticos o células a ratones recién nacidos.

<table><tbody><tr><td>Thinpro insulin syringe</td><td>Terumo</td><td>SS30M3009</td><td>3/10 cc, 3/8&quot; needle, 30 G, 1 per mouse</td></tr><tr><td>Evans blue dye</td><td>Sigma-Aldrich</td><td>E2129</td><td>Dilute to 1% with 1x Phosphate Buffered Saline</td></tr><tr><td>Cotton tipped applicators</td><td>Fisher Scientific</td><td>23-400-101</td><td></td></tr><tr><td>Fiber optic light source</td><td>Fisher Scientific</td><td>12-562-36</td><td></td></tr><tr><td>Dissecting microscope</td><td></td><td></td><td></td></tr></tbody></table>

intravenous injections in neonatal mice

La inyección intravenosa es una forma clínicamente aplicable para entregar agentes terapéuticos. Para roedores adultos y los animales más grandes, las inyecciones intravenosas son técnicamente viables y la rutina. Sin embargo, algunos modelos de ratones puede tener la aparición temprana de la enfermedad con una progresión rápida que hace que la administración de terapias potenciales difícil. La vena temporal (o facial) está justo anterior a la brote del oído en ratones y es claramente visible durante los dos primeros días después del nacimiento a cada lado de la cabeza utilizando un microscopio de disección. Durante esta ventana, la vena temporal puede ser inyectado con volúmenes de hasta 50 l. La inyección es segura y bien tolerada tanto por los cachorros y las presas. Un procedimiento de inyección típico se completa en 1-2 min, después de lo cual el cachorro es devuelto a la jaula de alojamiento. Al tercer día después del parto la vena es difícil de visualizar y el procedimiento de inyección se convierte técnicamente confiables. Esta técnica se ha utilizado para la entrega de virus adeno-asociado (AAV) vectORS, que a su vez pueden proporcionar casi en todo el cuerpo, la expresión transgénica estable para la vida del animal dependiendo del serotipo viral elegido.

Durante una inyección adecuada, la vena debe girar momentáneamente claro, o blanquear. Si la inyección de teñir todo el cachorro debe ponerse azul en cuestión de segundos. Si se ha producido una inyección inadecuada, a menudo hay un bolo subcutáneo concentrada en la cabeza o el cuello y inyectante puede salirse del sitio de inyección. Inyecciones inapropiadas también pueden dar lugar a la aparición de moretones alrededor de la garganta. Los cachorros que reciben inyecciones subcutáneas (es decir, la ...

Watch this Scientific Journal Video about Intravenous Injections in Neonatal Mice at JoVE.com

Intravenous Injections in Neonatal Mice

Los modelos animales de enfermedad pediátrica pueden experimentar aparición temprana y progresión de la enfermedad agresiva. Clínicamente entrega terapia pertinente a jóvenes modelos de ratón puede ser técnicamente difícil. Este protocolo describe un método de inyección intravenosa no invasivo para ratones recién nacidos dentro de los dos primeros días después del parto de la vida.

Las inyecciones intravenosas en ratones recién nacidos

Intravenous injection is a clinically applicable manner to deliver therapeutics. For adult rodents and larger animals, intravenous injections are ...

Universidad de Cartagena UDEC

Research

JoVE Journal

Biology

58.1K vistas.  Ohio State University.  Los modelos animales de enfermedad pediátrica pueden experimentar aparición temprana y progresión de la enfermedad agresiva. Clínicamente entrega terapia pertinente a jóvenes modelos de ratón puede ser técnicamente difícil. Este protocolo describe un método de inyección intravenosa no invasivo para ratones recién nacidos dentro de los dos primeros días después del parto de la vida. 

Video: Intravenous Injections in Neonatal Mice

Delivery of Therapeutic Agents Through Intracerebroventricular (ICV) and Intravenous (IV) Injection in Mice

Despite the protective role that blood brain barrier plays in shielding the brain, it limits the access to the central nervous system (CNS) which most often results in failure of potential therapeutics designed for neurodegenerative disorders 1,2. Neurodegenerative diseases such as Spinal Muscular Atrophy (SMA), in which the lower motor neurons are affected, can benefit greatly from introducing the therapeutic agents into the CNS. The purpose of this video is to demonstrate two different injection paradigms to deliver therapeutic materials into neonatal mice soon after birth. One of these methods is injecting directly into cerebral lateral ventricles (Intracerebroventricular) which results in delivery of materials into the CNS through the cerebrospinal fluid 3,4. The second method is a temporal vein injection (intravenous) that can introduce different therapeutics into the circulatory system, leading to systemic delivery including the CNS 5. Widespread transduction of the CNS is achievable if an appropriate viral vector and viral serotype is utilized. Visualization and utilization of the temporal vein for injection is feasible up to postnatal day 6. However, if the delivered material is intended to reach the CNS, these injections should take place while the blood brain barrier is more permeable due to its immature status, preferably prior to postnatal day 2. The fully developed blood brain barrier greatly limits the effectiveness of intravenous delivery. Both delivery systems are simple and effective once the surgical aptitude is achieved. They do not require any extensive surgical devices and can be performed by a single person. However, these techniques are not without challenges. The small size of postnatal day 2 pups and the subsequent small target areas can make the injections difficult to perform and initially challenging to replicate.

Delivery of Therapeutic Agents Through Intracerebroventricular ICV and Intravenous IV Injection in Mice

This article demonstrates two very different methods of injection: 1) into the brain (intracerebroventricular) and 2) systemic (intravenous) to introduce the therapeutic agents into the central nervous system of neonatal mice.

La entrega de los agentes terapéuticos a través de intracerebroventricular (ICV) y la inyección intravenosa (IV) en ratones

Despite the protective role that blood brain barrier plays in shielding the brain, it limits the access to the central nervous system (CNS) which most ...

Investigación

Medicina

Use of In vivo Imaging to Monitor the Progression of Experimental Mouse Cytomegalovirus Infection in Neonates

Human Cytomegalovirus (HCMV or HHV-5) is a life-threatening pathogen in immune-compromised individuals. Upon congenital or neonatal infection, the virus can infect and replicate in the developing brain, which may induce severe neurological damage, including deafness and mental retardation. Despite the potential severity of the symptoms, the therapeutic options are limited by the unavailability of a vaccine and the absence of a specific antiviral therapy. Furthermore, a precise description of the molecular events occurring during infection of the central nervous system (CNS) is still lacking since observations mostly derive from the autopsy of infected children. Several animal models, such as rhesus macaque CMV, have been developed and provided important insights into CMV pathogenesis in the CNS. However, despite its evolutionary proximity with humans, this model was limited by the intracranial inoculation procedure used to infect the animals and consistently induce CNS infection. Furthermore, ethical considerations have promoted the development of alternative models, among which neonatal infection of newborn mice with mouse cytomegalovirus (MCMV) has recently led to significant advances. For instance, it was reported that intraperitoneal injection of MCMV to Balb/c neonates leads to infection of neurons and glial cells in specific areas of the brain. These findings suggested that experimental inoculation of mice might recapitulate the deficits induced by HCMV infection in children. Nevertheless, a dynamic analysis of MCMV infection of neonates is difficult to perform because classical methodology requires the sacrifice of a significant number of animals at different time points to analyze the viral burden and/or immune-related parameters. To circumvent this bottleneck and to enable future investigations of rare mutant animals, we applied in vivo imaging technology to perform a time-course analysis of the viral dissemination in the brain upon peripheral injection of a recombinant MCMV expressing luciferase to C57Bl/6 neonates.

Use of In vivo Imaging to Monitor the Progression of Experimental Mouse Cytomegalovirus Infection in Neonates

Human Cytomegalovirus (HCMV) infection of neonates represents an important cause of mental retardation, yet the molecular events leading to virus-induced pathogenesis are still poorly understood. To investigate the dynamics of brain infection, we adapted whole-animal in vivo imaging to perform time-course analysis of neonates infected with a luciferase-recombinant virus.

El uso de<em&gt; En vivo</em&gt; Imágenes para controlar la progresión de la infección por citomegalovirus Experimental del ratón en neonatos

Human Cytomegalovirus (HCMV or HHV-5) is a life-threatening  pathogen in immune-compromised individuals. Upon congenital or neonatal  infection, the virus ...

Inmunología e Infección

Intravenous and Intra-amniotic In Utero Transplantation in the Murine Model

In utero transplantation (IUT) is a unique and versatile mode of therapy that can be used to introduce stem cells, viral vectors, or any other substances early in the gestation. The rationale behind IUT for therapeutic purposes is based on the small size of the fetus, the fetal immunologic immaturity, the accessibility and proliferative nature of the fetal stem or progenitor cells, and the potential to treat a disease or the onset of symptoms prior to birth. Taking advantage of these normal developmental properties of the fetus, the delivery of hematopoietic stem cells (HSC) via an IUT has the potential to treat congenital hematologic disorders such as sickle cell disease, without the required myeloablative or immunosuppressive conditioning required for postnatal HSC transplants. Similarly, the accessibility of progenitor cells in multiple organs during development potentially allows for a more efficient targeting of stem/progenitor cells following an IUT of viral vectors for gene therapy or genome editing. Additionally, IUT can be used to study normal developmental processes including, but not limited to, the development of immunologic tolerance. The murine model provides a valuable and affordable means to understanding the potential and limitations of IUT prior to pre-clinical large animal studies and an eventual clinical application. Here, we describe a protocol for performing an IUT in the murine fetus through intravenous and intra-amniotic routes. This protocol has been used successfully to elucidate the necessary conditions and mechanisms behind in utero hematopoietic stem cell transplantation, tolerance induction, and in utero gene therapy.

Intravenous and Intra-amniotic In Utero Transplantation in the Murine Model

We describe a protocol for performing an in utero transplantation (IUT) through intravenous and intra-amniotic routes of injection in the murine model. This protocol can be used to introduce cells, viral vectors, and other substances into the unique immune-tolerant fetal environment.

Intravenosa y Intra-amniótico en el útero el trasplante en el modelo murino

In utero transplantation (IUT) is a unique and versatile mode of therapy that can be used to introduce stem cells, viral vectors, or any other substances ...

Biología del Desarrollo

Intracerebroventricular Viral Injection of the Neonatal Mouse Brain for Persistent and Widespread Neuronal Transduction

With the pace of scientific advancement accelerating rapidly, new methods are needed for experimental neuroscience to quickly and easily manipulate gene expression in the mouse brain. Here we describe a technique first introduced by Passini and Wolfe for direct intracranial delivery of virally-encoded transgenes into the neonatal mouse brain. In its most basic form, the procedure requires only an ice bucket and a microliter syringe. However, the protocol can also be adapted for use with stereotaxic frames to improve consistency for researchers new to the technique. The method relies on the ability of adeno-associated virus (AAV) to move freely from the cerebral ventricles into the brain parenchyma while the ependymal lining is still immature during the first 12-24 hr after birth. Intraventricular injection of AAV at this age results in widespread transduction of neurons throughout the brain. Expression begins within days of injection and persists for the lifetime of the animal. Viral titer can be adjusted to control the density of transduced neurons, while co-expression of a fluorescent protein provides a vital label of transduced cells. With the rising availability of viral core facilities to provide both off-the-shelf, pre-packaged reagents and custom viral preparation, this approach offers a timely method for manipulating gene expression in the mouse brain that is fast, easy, and far less expensive than traditional germline engineering.

Here we demonstrate a technique for widespread neuronal transduction by intraventricular injection of adeno-associated virus into the neonatal mouse brain. This method provides a rapid and easy way to attain lifelong expression of virally-delivered transgenes.

Inyección Viral Intracerebroventricular de Neonatología del ratón Cerebro de transducción neuronal persistente y generalizada

With the pace of scientific advancement accelerating rapidly, new methods are needed for experimental neuroscience to quickly and easily manipulate gene ...

Neurociencias

Intracerebroventricular and Intravascular Injection of Viral Particles and Fluorescent Microbeads into the Neonatal Brain

In the study on the pathogenesis of viral encephalitis, the infection method is critical. The first of the two main infectious routes to the brain is the hematogenous route, which involves infection of the endothelial cells and pericytes of the brain. The second is the intracerebroventricular (ICV) route. Once within the central nervous system (CNS), viruses may spread to the subarachnoid space, meninges, and choroid plexus via the cerebrospinal fluid. In experimental models, the earliest stages of CNS viral distribution are not well characterized, and it is unclear whether only certain cells are initially infected. Here, we have analyzed the distribution of cytomegalovirus (CMV) particles during the acute phase of infection, termed primary viremia, following ICV or intravascular (IV) injection into the neonatal mouse brain. In the ICV injection model, 5 &#181;l of murine CMV (MCMV) or fluorescent microbeads were injected into the lateral ventricle at the midpoint between the ear and eye using a 10-&#181;l syringe with a 27 G needle. In the IV injection model, a 1-ml syringe with a 35 G needle was used. A transilluminator was used to visualize the superficial temporal (facial) vein of the neonatal mouse. We infused 50 &#181;l of MCMV or fluorescent microbeads into the superficial temporal vein. Brains were harvested at different time points post-injection. MCMV genomes were detected using the in situ hybridization method. Fluorescent microbeads or green fluorescent protein expressing recombinant MCMV particles were observed by fluorescent microscopy. These techniques can be applied to many other pathogens to investigate the pathogenesis of encephalitis.

Here, we describe a simple method of intracerebroventricular and intravascular injection of viral particles or fluorescent microbeads into the neonatal mouse brain. The localization pattern of the virus and nanoparticles could be detected by microscopic evaluation or by in situ hybridization.

Intracerebroventricular y por inyección intravascular de partículas víricas y fluorescentes microperlas en el cerebro neonatal

In the study on the pathogenesis of viral encephalitis, the infection method is critical. The first of the two main infectious routes to the brain is the ...

Realización de la inyección intracerebroventricular en ratones mediante un enfoque a mano alzada

Free-Hand Intracerebroventricular Injections in Mice

The investigation of neuroendocrine systems often requires the delivery of drugs, viruses, or other experimental agents directly into the brains of mice. An intracerebroventricular (ICV) injection allows the widespread delivery of the experimental agent throughout the brain (particularly in the structures near the ventricles). Here, methods for making free-hand ICV injections in adult mice are described. By using visual and tactile landmarks on the heads of mice, injections into the lateral ventricles can be made rapidly and reliably. The injections are made with a glass syringe held in the experimenter&#39;s hand and placed at approximate distances from the landmarks. Thus, this technique does not require a stereotaxic frame. Furthermore, this technique requires only brief isoflurane anesthesia, which permits the subsequent assessment of mouse behavior and/or physiology in awake, freely behaving mice. Free-hand ICV injection is a powerful tool for the efficient delivery of experimental agents into the brains of living mice and can be combined with other techniques such as frequent blood sampling, neural circuit manipulation, or in vivo recording to investigate neuroendocrine processes.

Autor destacado: Perspectivas, innovaciones y vías futuras en el neurocontrol reproductivo 

Here, a simple and rapid approach for performing intracerebroventricular injections in mice using a free-hand approach (that is, without a stereotaxic device) is described.

Inyecciones intracerebroventriculares a mano alzada en ratones

The investigation of neuroendocrine systems often requires the delivery of drugs, viruses, or other experimental agents directly into the brains of mice. ...

A Neonatal Rodent Model of Retroorbital Vein Injection

Intravenous (iv) injection is the most used route of drug administration in neonates in the clinical setting. Therefore, retroorbital vein injection is an important method for compound administration in research, where successful proof-of-concept studies can progress into much-needed neonatal clinical trials. Most intravenous studies in neonatal rodents use the superficial temporal/facial vein. However, retroorbital injection becomes unreliable in neonatal rodents older than 2 days after the skin darkens and the vein is no longer visible. In the present protocol, we describe the retroorbital injection of the venous sinus in both the neonatal mouse and rat at ages when the superficial temporal vein is no longer visible, but the eyes have not opened yet. Eye-opening facilitates retro-orbital injection by enabling the researcher to clearly see that they are not perforating the eye when inserting the needle. We demonstrate that this technique can be performed in a reliable and reproducible manner without adverse effects. Additionally, we show that it can be used in many studies, such as administering compounds to study neonatal brain injury.

This protocol aims to demonstrate a reproducible venous administration route that can be used in rats and mice throughout the neonatal period. This procedure is important for preclinical rodent studies that wish to mirror drug administration in neonatal care units primarily using intravenous administration.

Un modelo neonatal de inyección venosa retroorbitaria en roedores

Intravenous (iv) injection is the most used route of drug administration in neonates in the clinical setting. Therefore, retroorbital vein injection is an ...

Un protocolo integral para la administración de inyecciones intratecales en ratones neonatos

Intrathecal Injection of Newborn Mouse for Genome Editing and Drug Delivery

Intrathecal injection is a commonly employed procedure in both pediatric and adult clinics, serving as an effective means to administer medications and treatments. By directly delivering medications and treatments into the cerebrospinal fluid of the central nervous system, this method achieves higher localized drug concentrations while reducing systemic side-effects compared to other routes such as intravenous, subcutaneous, or intramuscular injections. Its importance extends beyond clinical settings, as intrathecal injection plays a vital role in preclinical studies focused on treating neurogenetic disorders in rodents and other large animals, including non-human primates. However, despite its widespread application, intrathecal injection in young, particularly neonatal pups, poses significant technical challenges due to their small size and fragile nature. Successful and reliable administration of intrathecal injections in newborn mice requires meticulous attention to detail and careful consideration of various factors. Thus, there is a crucial need for a standardized protocol that not only provides instructions but also highlights key technical considerations and good laboratory practices to ensure procedural consistency, as well as the safety and welfare of the animals.
To address this unmet need, we present a detailed and comprehensive protocol for performing intrathecal injections specifically in newborn pups on postnatal day 1 (P1). By following the step-by-step instructions, researchers can confidently perform intrathecal injections in neonatal pups, enabling the accurate delivery of drugs, antisense oligos, and viruses for gene replacement or genome editing-based treatments. Furthermore, the importance of adhering to good laboratory practices is emphasized to maintain the well-being of animals and ensure reliable experimental outcomes. This protocol aims to address the technical challenges associated with intrathecal injections in neonatal mice, ultimately facilitating advances in the field of neurogenetic research that aims to develop potential therapeutic interventions.

Autor destacado: Inyección intratecal: un método de administración eficiente y confiable para probar la eficacia de la edición genética en cerebros de ratones neonatos

The present protocol outlines step-by-step instructions for performing intrathecal injections in neonatal mice for gene editing and drug delivery.

Inyección intratecal de ratón recién nacido para la edición del genoma y la administración de fármacos

Intrathecal injection is a commonly employed procedure in both pediatric and adult clinics, serving as an effective means to administer medications and ...

Las inyecciones intravenosas en ratones recién nacidos

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Inyecciones intracerebroventriculares a mano alzada en ratones

Un modelo neonatal de inyección venosa retroorbitaria en roedores

Inyección intratecal de ratón recién nacido para la edición del genoma y la administración de fármacos