Replacement of Small Animal Echocardiographic Instrumentation

更换小动物超声心动图仪器

• 批准号: 8247644
• 负责人: Robert Scott Ross
• 金额: $ 37.07万
• 依托单位: VETERANS MEDICAL RESEARCH FDN/SAN DIEGO
• 依托单位国家: 美国
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-05 至 2013-06-04
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8247644
• 关键词: Adult; Animal Model; Animals; Clinical; Color; Computer software; Data; Disease; Electrocardiogram; Embryo; Focused Ultrasound Therapy; Future; Heart; Image; Knockout Mice; Knowledge; Lead; Life; Maintenance; Measurement; Mechanics; Microscopic; Molecular; Morphologic artifacts; Motion; Mus; Organ; Physiological; Process; Request for Proposals; Resolution; Rodent; System; Technology; Time; Transgenic Mice; Ultrasonography; Ventricular; base; design; genetic manipulation; heart function; heart imaging; in vivo; instrument; instrumentation; novel; respiratory; solid state

DESCRIPTION (provided by applicant): This proposal requests a small animal ultrasound imaging system to replace one with technology dating to 2002. The machine requested is a VisualSonics 2100 imaging system which has a new design compared to the older terminal technology. It is based on a digitally designed platform that is easily upgraded and functions at higher frame rates than the older machine. It also incorporates numerous new modes including color Doppler, simultaneous 2D and M-mode or 2D and Doppler imaging, steerable Doppler, strain and strain-rate imaging, automated ventricular analysis8 contrast imaging and ECG / respiratory gated imaging optimization software. It has a tremendous advance over the older technology since it uses solid state linear array ultrasound probes as opposed to mechanical probes. This allows for an electronically controlled, dynamically focused ultrasound beam as opposed to the single focal point on the older ultrasound probes. Higher quality and easier image acquisition results, permitting a higher throughput during an imaging session. Imaging artifacts are also reduced with the new probes vs. the older system, since they do not require maintenance. Due to design limitations, the older machine operated with technology many decades old in comparison to modern clinical ultrasound machines. The new machine brings great advances and advantages for small animal imaging. The importance of this technology can be appreciated since transgenic and knockout mice are now used quite commonly to facilitate understanding the molecular basis of disease. Yet, imaging of the heart, vessel or other organs in embryonic or adult rodents has lagged behind these molecular advancements, thus hindering our ability to assess the physiological relevance of the genetic manipulations. The requested instrument will enable us to: 1) perform serial in vivo measurements in living rodents and 2) obtain real-time spatial resolution that is nearly microscopic. Non-invasive in vivo assessment of the function of the mouse heart has been difficult because of both its small size and also since it beats at >600 times per minute. The requested instrument, for the first time, enables accurate assessment of not only whole heart function, but regional wall motion. This advancement will have profound implications on understanding the physiological importance of genetic manipulations in rodents. The information gained from these studies will yield important and novel data which will advance our knowledge about the basis for a wide range of disease processes and potentially lead to future novel therapies. Further, the imaging platform requested will allow us to equip our trainees for the highly desired ability to perform integrative studies on animal models, a capability that will make them more competitive in the academic marketplace. PUBLIC HEALTH RELEVANCE: The proposed instrument will be used to visualize the cardiovascular system and other organs in animals ranging in size from the smallest mouse embryo, to the size of an adult rat or guinea pig. Using harmless ultrasound, akin to that used to visualize the developing human fetus, it will allow the investigators to measure a large array of anatomic and functional attributes in the living animal, even at multiple time points.

描述(由申请人提供)：这项提案要求一个小型动物超声成像系统来取代一个可以追溯到2002年的技术。所要求的机器是Visualsonics 2100成像系统，与旧的终端技术相比，它具有新的设计。它基于一个数字设计的平台，该平台易于升级，并且比旧机器具有更高的帧速率。它还集成了许多新模式，包括彩色多普勒、同时2D和M模式或2D和多普勒成像、可操纵的多普勒、应变和应变率成像、自动心室分析8对比成像和心电/呼吸门控成像优化软件。与旧技术相比，它有一个巨大的进步，因为它使用的是固态线性阵列超声探头，而不是机械探头。这允许电子控制的、动态聚焦的超声束，而不是老式超声探头上的单一焦点。更高质量和更轻松的图像采集结果，允许在成像会话期间获得更高的吞吐量。与旧系统相比，新探头的成像伪影也减少了，因为它们不需要维护。由于设计的限制，与现代临床超声仪器相比，旧机器使用的技术已经有几十年的历史了。这台新机器为小动物成像带来了巨大的进步和优势。这项技术的重要性是可以理解的，因为转基因和基因敲除小鼠现在被用来帮助理解疾病的分子基础。然而，胚胎或成年啮齿动物的心脏、血管或其他器官的成像一直落后于这些分子进步，因此阻碍了我们评估基因操作的生理相关性的能力。所要求的仪器将使我们能够：1)在活的啮齿动物身上进行连续的活体测量，2)获得几乎微观的实时空间分辨率。体内非侵入性 评估老鼠心脏的功能一直很困难，因为它很小，而且每分钟跳动600次。所要求的仪器首次能够不仅准确地评估整个心脏功能，而且能够准确地评估局部室壁运动。这一进展将对理解啮齿动物基因操作的生理重要性产生深远的影响。从这些研究中获得的信息将产生重要和新颖的数据，这些数据将促进我们对广泛疾病过程的基础的了解，并可能导致未来的新疗法。此外，我们要求的成像平台将使我们的受训人员具备高度期望的综合执行能力 研究动物模型，这一能力将使它们在学术市场上更具竞争力。 与公共卫生相关：拟议的仪器将用于可视化动物的心血管系统和其他器官，大小从最小的小鼠胚胎到成年大鼠或豚鼠的大小不等。使用无害的超声波，类似于用于可视化发育中的人类胎儿的超声波，它将使研究人员能够测量活着的动物的大量解剖和功能属性，即使在多个时间点。

项目成果

Collagen Fibril Orientation in Tissue Specimens From Atherosclerotic Plaque Explored Using Small Angle X-Ray Scattering.

使用小角度 X 射线散射探索动脉粥样硬化斑块组织样本中胶原纤维的方向。

• DOI: 10.1115/1.4052432
• 发表时间: 2022
• 期刊: Journal of biomechanical engineering
• 作者: Silva,Herbert;Tassone,Christopher;Ross,ElsieGyang;Lee,JasonT;Zhou,Wei;Nelson,Drew
• 通讯作者: Nelson,Drew

Obesity and risk for hypertension and diabetes among Kenyan adults: Results from a national survey.

• DOI: 10.1097/md.0000000000027484
• 发表时间: 2021-10-08
• 期刊: Medicine
• 影响因子: 1.6
• 作者: Temu TM;Macharia P;Mtui J;Mwangi M;Ngungi PW;Wanjalla C;Bloomfield GS;Farquhar C;Nyanjau L;Gathecha GK;Kibachio J
• 通讯作者: Kibachio J

B-arrestin-2 Signaling Is Important to Preserve Cardiac Function During Aging.

• DOI: 10.3389/fphys.2021.696852
• 发表时间: 2021
• 期刊: Frontiers in physiology
• 影响因子: 4
• 作者: Capote AE;Batra A;Warren CM;Chowdhury SAK;Wolska BM;Solaro RJ;Rosas PC
• 通讯作者: Rosas PC

Leveraging Machine Learning and Artificial Intelligence to Improve Peripheral Artery Disease Detection, Treatment, and Outcomes.

• DOI: 10.1161/circresaha.121.318224
• 发表时间: 2021-06-11
• 期刊: Circulation research
• 影响因子: 20.1
• 作者: Flores AM;Demsas F;Leeper NJ;Ross EG
• 通讯作者: Ross EG

Association of Cardiotoxicity With Doxorubicin and Trastuzumab: A Double-Edged Sword in Chemotherapy.

• DOI: 10.7759/cureus.18194
• 发表时间: 2021-09
• 期刊: Cureus
• 作者: Gabani M;Castañeda D;Nguyen QM;Choi SK;Chen C;Mapara A;Kassan A;Gonzalez AA;Khataei T;Ait-Aissa K;Kassan M
• 通讯作者: Kassan M