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Attia MF, Akasov R, Elbaz NM, Owens TC, Curtis EC, Panda S, Santos-Oliveira R, Alexis F, Kievit FM, Whitehead DC. Radiopaque Iodosilane-Coated Lipid Hybrid Nanoparticle Contrast Agent for Dual-Modality Ultrasound and X-ray Bioimaging. ACS APPLIED MATERIALS & INTERFACES 2022; 14:54389-54400. [PMID: 36449986 DOI: 10.1021/acsami.2c09104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Here, we report the synthesis of robust hybrid iodinated silica-lipid nanoemulsions (HSLNEs) for use as a contrast agent for ultrasound and X-ray applications. We engineered iodinated silica nanoparticles (SNPs), lipid nanoemulsions, and a series of HSLNEs by a low-energy spontaneous nanoemulsification process. The formation of a silica shell requires sonication to hydrolyze and polymerize/condensate the iodomethyltrimethoxysilane at the oil/water interface of the nanoemulsion droplets. The resulting nanoemulsions (NEs) exhibited a homogeneous spherical morphology under transmission electron microscopy. The particles had diameters ranging from 20 to 120 nm with both negative and positive surface charges in the absence and presence of cetyltrimethylammonium bromide (CTAB), respectively. Unlike CTAB-coated nanoformulations, the CTAB-free NEs showed excellent biocompatibility in murine RAW macrophages and human U87-MG cell lines in vitro. The maximum tolerated dose assessment was evaluated to verify their safety profiles in vivo. In vitro X-ray and ultrasound imaging and in vivo computed tomography were used to monitor both iodinated SNPs and HSLNEs, validating their significant contrast-enhancing properties and suggesting their potential as dual-modality clinical agents in the future.
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Affiliation(s)
- Mohamed F Attia
- Center for Nanotechnology in Drug Delivery and Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina27599, United States
| | - Roman Akasov
- Federal Scientific Research Centre "Crystallography and Photonics" of RAS, 59 Leninsky Avenue, Moscow119333, Russia
- I.M. Sechenov First Moscow State Medical University, Trubetskaya Street 8-2, Moscow119991, Russia
| | - Nancy M Elbaz
- Joint Department of Biomedical Engineering, University of North Carolina and North Carolina State University, Chapel Hill, North Carolina27599, United States
| | - Tyler C Owens
- Center for Nanotechnology in Drug Delivery and Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina27599, United States
| | - Evan C Curtis
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska68583-0900, United States
| | - Soham Panda
- Department of Chemistry, Clemson University, Clemson, South Carolina29634, United States
| | - Ralph Santos-Oliveira
- Brazilian Nuclear Energy Commission, Nuclear Engineering Institute, Argonauta Nuclear Reactor Center, Rio de Janeiro21941906, Brazil
- Laboratory of Radiopharmacy and Nanoradiopharmaceuticals, Zona Oeste State University, Rio de Janeiro23070-200, Brazil
| | - Frank Alexis
- Departamento de Ingeniería Química, Colegio de Ciencias e Ingenierías, Universidad San Francisco de Quito USFQ, Quito170901, Ecuador
| | - Forrest M Kievit
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska68583-0900, United States
| | - Daniel C Whitehead
- Department of Chemistry, Clemson University, Clemson, South Carolina29634, United States
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Elser EB, Mai W, Reetz JA, Thawley V, Bagshaw H, Suran JN. Serial abdominal radiographs do not significantly increase accuracy of diagnosis of gastrointestinal mechanical obstruction due to occult foreign bodies in dogs and cats. Vet Radiol Ultrasound 2020; 61:399-408. [PMID: 32350994 DOI: 10.1111/vru.12870] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 02/15/2020] [Accepted: 02/16/2020] [Indexed: 11/30/2022] Open
Abstract
Abdominal radiographs are commonly used in dogs and cats that present with gastrointestinal signs. When initial abdominal radiographs are equivocal for the presence or absence of gastrointestinal mechanical obstruction, follow-up abdominal radiographs may be recommended. Based on our review of the literature, no published study has been performed to evaluate the clinical utility of serial abdominal radiographs in such cases. The purpose of this study is to determine whether follow-up abdominal radiographs increase diagnostic accuracy for mechanical obstruction. A prospective cohort study was performed on client-owned dogs and cats with clinical concern for gastrointestinal mechanical obstruction and initial abdominal radiographs inconclusive for the presence of obstruction. Follow-up abdominal radiographs were performed between 7 and 28 h of the initial radiographs; an abdominal ultrasound performed within 3 h of the follow-up study served as the gold standard. A total of 57 patients (40 dogs and 17 cats) were recruited; 19 of 57 cases (11 dogs; 8 cats) were mechanically obstructed, all with nonradiopaque foreign bodies. Four blinded reviewers (2 radiologists, 1 radiology resident, 1 criticalist) separately assessed the initial and the combined initial/follow-up radiographic studies for diagnosis of mechanical obstruction; for each observer, there was no significant change in accuracy (P = .058-.87) for the diagnosis of mechanical obstruction. Given the lack of significant increase in diagnostic accuracy using follow-up radiographs in cases of occult gastrointestinal mechanical obstruction, other diagnostic options (eg, abdominal ultrasonography) could be considered when survey abdominal radiographs are inconclusive for the diagnosis of mechanical obstruction in dogs and cats.
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Affiliation(s)
- Emily B Elser
- Department of Clinical Sciences & Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Wilfried Mai
- Department of Clinical Sciences & Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Jennifer A Reetz
- Department of Clinical Sciences & Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Vince Thawley
- Department of Clinical Sciences & Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | | | - Jantra N Suran
- RadioLogic, Veterinary Diagnostic Imaging Services, LLC, Media, Pennsylvania
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Rausch S, Godoy C, Schmidt C, Pellegrini L, Veiga D, Krolikowski G, Wolle L, Oliveira A. Radiologia do intestino delgado de cães por meio da técnica de duplo-contraste. ARQ BRAS MED VET ZOO 2009. [DOI: 10.1590/s0102-09352009000200033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Armbrust LJ, Hoskinson JJ, Lora-Michiels M, Milliken GA. Gastric emptying in cats using foods varying in fiber content and kibble shapes. Vet Radiol Ultrasound 2003; 44:339-43. [PMID: 12816379 DOI: 10.1111/j.1740-8261.2003.tb00466.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The purpose of this study is to evaluate the influence of kibble shape and fiber content of commercial dry foods on gastric emptying in healthy cats. Eight healthy cats were used to evaluate four different diets which varied in shape of kibble (round versus triangle) or fiber content (low versus high). Diets were labeled with 99mTc-mebrofenin and gastric emptying was evaluated with nuclear scintigraphy. There was a significant difference between the kibble shapes at both T50 and T20. The triangle shaped kibble required significantly longer time than the round kibble to reach T50 (P = 0.02) and T20 (P = 0.001). Diet fiber content did not have a significant influence on T50, and T20. The influence of caloric and water intake was assessed with division of cats into high, medium, and low intake groups. The caloric intake had its main effect at T50 with the lowest quartile of caloric intake requiring significantly less time to reach T50 than the middle group and upper quartile (P = 0.05). Water intake did not have a significant effect on gastric emptying in this study. There was no relationship or correlation between the surface area of the food (cm2/kg) and T90, T50, and T20.
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Affiliation(s)
- L J Armbrust
- Department of Clinical Sciences, Kansas State University, Manhattan, KS 66506, USA
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Paoloni MC, Penninck DG, Moore AS. Ultrasonographic and clinicopathologic findings in 21 dogs with intestinal adenocarcinoma. Vet Radiol Ultrasound 2002; 43:562-7. [PMID: 12502112 DOI: 10.1111/j.1740-8261.2002.tb01050.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
In a retrospective study of 21 dogs with intestinal adenocarcinoma, the signalment, clinical presentation, laboratory findings, ultrasonographic features, treatment, and outcome were reviewed. Anorexia (n = 16), vomiting (n = 15), diarrhea (n = 10), and weight loss (n = 9) were the most common clinical signs reported. Ultrasonographic features that were evaluated included location, length, wall thickness, echogenicity, regional motility, layering, regional lymphadenopathy, and fluid accumulation proximal to the lesion site. All lesions were transmural and associated with complete loss of wall layering. Maximum wall thickening at the lesion site ranged from 7 to 17 mm (median 12 mm, mean 11.9 mm). Most of the dogs had a lesion measuring from 23 to 63 mm in length, (median 40 mm, mean 42 mm). Most intestinal lesions were poorly echogenic and had an irregular lumen. Fluid accumulation proximal to the lesion site was identified in 17 of 21 dogs, and in 13 of 17 dogs the fluid accumulation was considered moderate to severe. Regional lymphadenopathy and/or nodular mesentery/omentum were noted in 12 of 21 dogs. The tumor was located in small intestine for 15 dogs and in the colon for the remaining 6 dogs. Fifteen dogs were treated by surgical resection of the intestinal mass. Their median survival time was 233 days. Only gender appeared to influence survival. Female dogs lived a median of 28 days, whereas male dogs lived a median of 272 days.
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Affiliation(s)
- Melissa C Paoloni
- Department of Clinical Sciences, Tufts University School of Veterinary Medicine, 200 Westboro Road North, Grafton, MA 01536, USA
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Forrest LJ, Thrall DE. Oncologic applications of diagnostic imaging techniques. Vet Clin North Am Small Anim Pract 1995; 25:185-205. [PMID: 7709557 DOI: 10.1016/s0195-5616(95)50012-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Before appropriate therapy can be instituted for a cancer patient, the presence and extent of tumor must be evaluated. Deciding which imaging technique to use depends on tumor location, type, and biologic behavior. Conventional radiography provides important information at a relatively low cost compared with other imaging modalities. Ultrasound is a valuable adjunct to radiography, but does not replace it because both imaging modalities provide unique information. Nuclear medicine procedures contribute additional, unique data by providing physiological information, but specificity is lacking. Both CT and MRI provide images with exquisite anatomic detail, but availability and cost prohibit their general use.
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Affiliation(s)
- L J Forrest
- Department of Surgical Sciences, University of Wisconsin-Madison, School of Veterinary Medicine, USA
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Biller DS, Partington BP, Miyabayashi T, Leveille R. ULTRASONOGRAPHIC APPEARANCE OF CHRONIC HYPERTROPHIC PYLORIC GASTROPATHY IN THE DOG. Vet Radiol Ultrasound 1994. [DOI: 10.1111/j.1740-8261.1994.tb00174.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Agut A, Sanchez-Valverde M, Lasaosa J, Murciano J, Molina F. USE OF IOHEXOL AS A GASTROINTESTINAL CONTRAST MEDIUM IN THE DOG. Vet Radiol Ultrasound 1993. [DOI: 10.1111/j.1740-8261.1993.tb01999.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Lamb CR. Abdominal ultrasonography in small animals: Intestinal tract and mesentery, kidneys, adrenal glands, uterus and prostate. J Small Anim Pract 1990. [DOI: 10.1111/j.1748-5827.1990.tb00811.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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