1
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Pons-Faudoa FP, Di Trani N, Capuani S, Facchi I, Wood AM, Nehete B, DeLise A, Sharma S, Shelton KA, Bushman LR, Chua CYX, Ittmann MM, Kimata JT, Anderson PL, Nehete PN, Arduino RC, Grattoni A. Antiviral potency of long-acting islatravir subdermal implant in SHIV-infected macaques. J Control Release 2024; 366:18-27. [PMID: 38142963 PMCID: PMC10922355 DOI: 10.1016/j.jconrel.2023.12.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/14/2023] [Accepted: 12/18/2023] [Indexed: 12/26/2023]
Abstract
Treatment nonadherence is a pressing issue in people living with HIV (PLWH), as they require lifelong therapy to maintain viral suppression. Poor adherence leads to antiretroviral (ARV) resistance, transmission to others, AIDS progression, and increased morbidity and mortality. Long-acting (LA) ARV therapy is a promising strategy to combat the clinical drawback of user-dependent dosing. Islatravir (ISL) is a promising candidate for HIV treatment given its long half-life and high potency. Here we show constant ISL release from a subdermal LA nanofluidic implant achieves viral load reduction in SHIV-infected macaques. Specifically, a mean delivery dosage of 0.21 ± 0.07 mg/kg/day yielded a mean viral load reduction of -2.30 ± 0.53 log10 copies/mL at week 2, compared to baseline. The antiviral potency of the ISL delivered from the nanofluidic implant was higher than oral ISL dosed either daily or weekly. At week 3, viral resistance to ISL emerged in 2 out of 8 macaques, attributable to M184V mutation, supporting the need of combining ISL with other ARV for HIV treatment. The ISL implant produced moderate reactivity in the surrounding tissue, indicating tolerability. Overall, we present the ISL subdermal implant as a promising approach for LA ARV treatment in PLWH.
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Affiliation(s)
- Fernanda P Pons-Faudoa
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Nicola Di Trani
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Simone Capuani
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Ilaria Facchi
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Anthony M Wood
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Bharti Nehete
- Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX 78602, USA
| | - Ashley DeLise
- Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX 78602, USA
| | - Suman Sharma
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Kathryn A Shelton
- Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX 78602, USA
| | - Lane R Bushman
- Deparment of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado- Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Corrine Ying Xuan Chua
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Michael M Ittmann
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jason T Kimata
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Peter L Anderson
- Deparment of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado- Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Pramod N Nehete
- Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX 78602, USA; The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX 77030, USA
| | - Roberto C Arduino
- Division of Infectious Diseases, Department of Internal Medicine, McGovern Medical School at The University of Texas Health Science Center, Houston, TX 77030, USA
| | - Alessandro Grattoni
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA; Department of Surgery, Houston Methodist Research Institute, Houston, TX 77030, USA; Department of Radiation Oncology, Houston Methodist Research Institute, Houston, TX 77030, USA.
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2
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Capuani S, Campa-Carranza JN, Hernandez N, Chua CYX, Grattoni A. Modeling of a Bioengineered Immunomodulating Microenvironment for Cell Therapy. Adv Healthc Mater 2024:e2304003. [PMID: 38215451 DOI: 10.1002/adhm.202304003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Indexed: 01/14/2024]
Abstract
Cell delivery and encapsulation platforms are under development for the treatment of Type 1 Diabetes among other diseases. For effective cell engraftment, these platforms require establishing an immune-protected microenvironment as well as adequate vascularization and oxygen supply to meet the metabolic demands of the therapeutic cells. Current platforms rely on 1) immune isolating barriers and indirect vascularization or 2) direct vascularization with local or systemic delivery of immune modulatory molecules. Supported by experimental data, here a broadly applicable predictive computational model capable of recapitulating both encapsulation strategies is developed. The model is employed to comparatively study the oxygen concentration at different levels of vascularization, transplanted cell density, and spatial distribution, as well as with codelivered adjuvant cells. The model is then validated to be predictive of experimental results of oxygen pressure and local and systemic drug biodistribution in a direct vascularization device with local immunosuppressant delivery. The model highlights that dense vascularization can minimize cell hypoxia while allowing for high cell loading density. In contrast, lower levels of vascularization allow for better drug localization reducing systemic dissemination. Overall, it is shown that this model can serve as a valuable tool for the development and optimization of platform technologies for cell encapsulation.
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Affiliation(s)
- Simone Capuani
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, 77030, USA
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Science (UCAS), Beijing, 100049, China
| | - Jocelyn Nikita Campa-Carranza
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, 77030, USA
- School of Medicine and Health Sciences, Tecnologico de Monterrey, Monterrey, NL, 64710, Mexico
| | - Nathanael Hernandez
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, 77030, USA
| | - Corrine Ying Xuan Chua
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, 77030, USA
| | - Alessandro Grattoni
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, 77030, USA
- Department of Surgery, Houston Methodist Hospital, Houston, TX, 77030, USA
- Department of Radiation Oncology, Houston Methodist Hospital, Houston, TX, 77030, USA
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3
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Liu H, Capuani S, Badachhape AA, Di Trani N, Davila Gonzalez D, Vander Pol RS, Viswanath DI, Saunders S, Hernandez N, Ghaghada KB, Chen S, Nance E, Annapragada AV, Chua CYX, Grattoni A. Intratumoral nanofluidic system enhanced tumor biodistribution of PD-L1 antibody in triple-negative breast cancer. Bioeng Transl Med 2023; 8:e10594. [PMID: 38023719 PMCID: PMC10658527 DOI: 10.1002/btm2.10594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 06/08/2023] [Accepted: 08/01/2023] [Indexed: 12/01/2023] Open
Abstract
Immune checkpoint inhibitors (ICI), pembrolizumab and atezolizumab, were recently approved for treatment-refractory triple-negative breast cancer (TNBC), where those with Programmed death-ligand 1 (PD-L1) positive early-stage disease had improved responses. ICIs are administered systemically in the clinic, however, reaching effective therapeutic dosing is challenging due to severe off-tumor toxicities. As such, intratumoral (IT) injection is increasingly investigated as an alternative delivery approach. However, repeated administration, which sometimes is invasive, is required due to rapid drug clearance from the tumor caused by increased interstitial fluid pressure. To minimize off-target drug biodistribution, we developed the nanofluidic drug-eluting seed (NDES) platform for sustained intratumoral release of therapeutic via molecular diffusion. Here we compared drug biodistribution between the NDES, intraperitoneal (IP) and intratumoral (IT) injection using fluorescently labeled PD-L1 monoclonal antibody (αPD-L1). We used two syngeneic TNBC murine models, EMT6 and 4T1, that differ in PD-L1 expression, immunogenicity, and transport phenotype. We investigated on-target (tumor) and off-target distribution using different treatment approaches. As radiotherapy is increasingly used in combination with immunotherapy, we sought to investigate its effect on αPD-L1 tumor accumulation and systemic distribution. The NDES-treated cohort displayed sustained levels of αPD-L1 in the tumor over the study period of 14 days with significantly lower off-target organ distribution, compared to the IP or IT injection. However, we observed differences in the biodistribution of αPD-L1 across tumor models and with radiation pretreatment. Thus, we sought to extensively characterize the tumor properties via histological analysis, diffusion evaluation and nanoparticles contrast-enhanced CT. Overall, we demonstrate that ICI delivery via NDES is an effective method for sustained on-target tumor delivery across tumor models and combination treatments.
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Affiliation(s)
- Hsuan‐Chen Liu
- Department of NanomedicineHouston Methodist Research InstituteHoustonTexasUSA
| | - Simone Capuani
- Department of NanomedicineHouston Methodist Research InstituteHoustonTexasUSA
- University of Chinese Academy of Science (UCAS)BeijingChina
| | | | - Nicola Di Trani
- Department of NanomedicineHouston Methodist Research InstituteHoustonTexasUSA
| | | | - Robin S. Vander Pol
- Department of NanomedicineHouston Methodist Research InstituteHoustonTexasUSA
| | - Dixita I. Viswanath
- Department of NanomedicineHouston Methodist Research InstituteHoustonTexasUSA
- Texas A&M University College of MedicineBryanTexasUSA
- Texas A&M University College of MedicineHoustonTexasUSA
| | - Shani Saunders
- Department of NanomedicineHouston Methodist Research InstituteHoustonTexasUSA
| | - Nathanael Hernandez
- Department of NanomedicineHouston Methodist Research InstituteHoustonTexasUSA
| | - Ketan B. Ghaghada
- Department of RadiologyBaylor College of MedicineHoustonTexasUSA
- Department of RadiologyTexas Children's HospitalHoustonTexasUSA
| | - Shu‐Hsia Chen
- Center for Immunotherapy ResearchHouston Methodist Research InstituteHoustonTexasUSA
- Neal Cancer CenterHouston Methodist Research InstituteHoustonTexasUSA
- Department of Physiology and BiophysicsWeill Cornell MedicineNew YorkNew YorkUSA
| | - Elizabeth Nance
- Department of Chemical EngineeringUniversity of WashingtonSeattleWashingtonUSA
- Department of BioengineeringUniversity of WashingtonSeattleWashingtonUSA
| | - Ananth V. Annapragada
- Department of RadiologyBaylor College of MedicineHoustonTexasUSA
- Department of RadiologyTexas Children's HospitalHoustonTexasUSA
| | | | - Alessandro Grattoni
- Department of NanomedicineHouston Methodist Research InstituteHoustonTexasUSA
- Department of SurgeryHouston Methodist HospitalHoustonTexasUSA
- Department of Radiation OncologyHouston Methodist HospitalHoustonTexasUSA
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4
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Pons-Faudoa FP, Di Trani N, Capuani S, Campa-Carranza JN, Nehete B, Sharma S, Shelton KA, Bushman LR, Abdelmawla F, Williams M, Roon L, Nerguizian D, Chua CYX, Ittmann MM, Nichols JE, Kimata JT, Anderson PL, Nehete PN, Arduino RC, Grattoni A. Long-acting refillable nanofluidic implant confers protection against SHIV infection in nonhuman primates. Sci Transl Med 2023; 15:eadg2887. [PMID: 37379369 DOI: 10.1126/scitranslmed.adg2887] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 06/09/2023] [Indexed: 06/30/2023]
Abstract
The impact of pre-exposure prophylaxis (PrEP) on slowing the global HIV epidemic hinges on effective drugs and delivery platforms. Oral drug regimens are the pillar of HIV PrEP, but variable adherence has spurred development of long-acting delivery systems with the aim of increasing PrEP access, uptake, and persistence. We have developed a long-acting subcutaneous nanofluidic implant that can be refilled transcutaneously for sustained release of the HIV drug islatravir, a nucleoside reverse transcriptase translocation inhibitor that is used for HIV PrEP. In rhesus macaques, the islatravir-eluting implants achieved constant concentrations of islatravir in plasma (median 3.14 nM) and islatravir triphosphate in peripheral blood mononuclear cells (median 0.16 picomole per 106 cells) for more than 20 months. These drug concentrations were above the established PrEP protection threshold. In two unblinded, placebo-controlled studies, islatravir-eluting implants conferred 100% protection against infection with SHIVSF162P3 after repeated low-dose rectal or vaginal challenge in male or female rhesus macaques, respectively, compared to placebo control groups. The islatravir-eluting implants were well tolerated with mild local tissue inflammation and no signs of systemic toxicity over the 20-month study period. This refillable islatravir-eluting implant has potential as a long-acting drug delivery system for HIV PrEP.
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Affiliation(s)
- Fernanda P Pons-Faudoa
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Nicola Di Trani
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Simone Capuani
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
- University of Chinese Academy of Science (UCAS), 19 Yuquan Road, Beijing 100049, China
| | - Jocelyn Nikita Campa-Carranza
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
- School of Medicine and Health Sciences, Tecnológico de Monterrey, Monterrey, Mexico
| | - Bharti Nehete
- Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX 78602, USA
| | - Suman Sharma
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Kathryn A Shelton
- Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX 78602, USA
| | - Lane R Bushman
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado-Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Farah Abdelmawla
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado-Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Martin Williams
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado-Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Laura Roon
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado-Anschutz Medical Campus, Aurora, CO 80045, USA
| | - David Nerguizian
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado-Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Corrine Ying Xuan Chua
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Michael M Ittmann
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Joan E Nichols
- Department of Surgery, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Jason T Kimata
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Peter L Anderson
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado-Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Pramod N Nehete
- Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX 78602, USA
- University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX 77030, USA
| | - Roberto C Arduino
- Division of Infectious Diseases, Department of Internal Medicine, McGovern Medical School at University of Texas Health Science Center, Houston, TX 77030, USA
| | - Alessandro Grattoni
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
- Department of Surgery, Houston Methodist Research Institute, Houston, TX 77030, USA
- Department of Radiation Oncology, Houston Methodist Research Institute, Houston, TX 77030, USA
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5
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Costantini G, Capuani S, Farrelly FA, Taloni A. Nuclear magnetic resonance signal decay in the presence of a background gradient: Normal and anomalous diffusion. J Chem Phys 2023; 158:2887937. [PMID: 37129963 DOI: 10.1063/5.0148175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 04/14/2023] [Indexed: 05/03/2023] Open
Abstract
A novel way for calculating the diffusion-weighted nuclear magnetic resonance (NMR) attenuation signal expression in the presence of a background gradient is developed. This method is easily applicable to NMR-attenuated signals arising from any pulse field gradient sequence experiments. Here, we provide detailed calculations for the classical pulsed gradient stimulated echo and the pulsed gradient spin echo, as the particular cases. Within this general theoretical framework, devised for Gaussian processes with stationary increments, we recover and extend the previous Stejskal-Tanner results in the case of normal diffusion and we furnish a new expression in the case of anomalous diffusion.
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Affiliation(s)
- G Costantini
- Istituto dei Sistemi Complessi-CNR, Sapienza, Piazzale A. Moro 2, I-00185 Rome, Italy
| | - S Capuani
- Istituto dei Sistemi Complessi-CNR, Sapienza, Piazzale A. Moro 2, I-00185 Rome, Italy
| | - F A Farrelly
- Istituto dei Sistemi Complessi-CNR, Via dei Taurini 19, I-00185 Rome, Italy
| | - A Taloni
- Istituto dei Sistemi Complessi-CNR, Via dei Taurini 19, I-00185 Rome, Italy
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6
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Pons-Faudoa FP, Di Trani N, Capuani S, Hernandez N, Wood AM, Nehete B, Niles J, Shelton KA, Kezar S, Bushman LR, Chua CYX, Ittmann MM, Anderson PL, Nehete PN, Arduino RC, Nichols JE, Grattoni A. Changes in local tissue microenvironment in response to subcutaneous long-acting delivery of tenofovir alafenamide in rats and non-human primates. J Control Release 2023; 358:116-127. [PMID: 37120032 DOI: 10.1016/j.jconrel.2023.04.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/19/2023] [Accepted: 04/23/2023] [Indexed: 05/01/2023]
Abstract
Several implantable long-acting (LA) delivery systems have been developed for sustained subcutaneous administration of tenofovir alafenamide (TAF), a potent and effective nucleotide reverse transcriptase inhibitor used for HIV pre-exposure prophylaxis (PrEP). LA platforms aim to address the lack of adherence to oral regimens, which has impaired PrEP efficacy. Despite extensive investigations in this field, tissue response to sustained subcutaneous TAF delivery remains to be elucidated as contrasting preclinical results have been reported in the literature. To this end, here we studied the local foreign body response (FBR) to sustained subdermal delivery of three forms of TAF, namely TAF free base (TAFfb), TAF fumarate salt (TAFfs), and TAFfb with urocanic acid (TAF-UA). Sustained constant drug release was achieved via titanium-silicon carbide nanofluidic implants previously shown to be bioinert. The analysis was conducted in both Sprague-Dawley (SD) rats and rhesus macaques over 1.5 and 3 months, respectively. While visual observation did not reveal abnormal adverse tissue reaction at the implantation site, histopathology and Imaging Mass Cytometry (IMC) analyses exposed a local chronic inflammatory response to TAF. In rats, UA mitigated foreign body response to TAF in a concentration-dependent manner. This was not observed in macaques where TAFfb was better tolerated than TAFfs and TAF-UA. Notably, the level of FBR was tightly correlated with local TAF tissue concentration. Further, regardless of the degree of FBR, the fibrotic capsule (FC) surrounding the implants did not interfere with drug diffusion and systemic delivery, as evidenced by TAF PK results and fluorescence recovery after photobleaching (FRAP).
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Affiliation(s)
- Fernanda P Pons-Faudoa
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Nicola Di Trani
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Simone Capuani
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA; University of Chinese Academy of Science (UCAS), 19 Yuquan Road, Beijing 100049, China
| | - Nathanael Hernandez
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Anthony M Wood
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Bharti Nehete
- Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX 78602, USA
| | - Jean Niles
- Department of Surgery, Houston Methodist Hospital, Houston, TX 77030, United States of America
| | - Kathryn A Shelton
- Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX 78602, USA
| | - Sarah Kezar
- Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX 78602, USA
| | - Lane R Bushman
- Deparment of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado- Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Corrine Ying Xuan Chua
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Michael M Ittmann
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Peter L Anderson
- Deparment of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado- Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Pramod N Nehete
- Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX 78602, USA; The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX 77030, USA
| | - Roberto C Arduino
- Division of Infectious Diseases, Department of Internal Medicine, McGovern Medical School at The University of Texas Health Science Center, Houston, TX 77030, USA
| | - Joan E Nichols
- Department of Surgery, Houston Methodist Hospital, Houston, TX 77030, United States of America
| | - Alessandro Grattoni
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA; Department of Surgery, Houston Methodist Research Institute, Houston, TX 77030, USA; Department of Radiation Oncology, Houston Methodist Research Institute, Houston, TX 77030, USA.
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7
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Paez-Mayorga J, Campa-Carranza JN, Capuani S, Hernandez N, Liu HC, Chua CYX, Pons-Faudoa FP, Malgir G, Alvarez B, Niles JA, Argueta LB, Shelton KA, Kezar S, Nehete PN, Berman DM, Willman MA, Li XC, Ricordi C, Nichols JE, Gaber AO, Kenyon NS, Grattoni A. Implantable niche with local immunosuppression for islet allotransplantation achieves type 1 diabetes reversal in rats. Nat Commun 2022; 13:7951. [PMID: 36572684 PMCID: PMC9792517 DOI: 10.1038/s41467-022-35629-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 12/14/2022] [Indexed: 12/27/2022] Open
Abstract
Pancreatic islet transplantation efficacy for type 1 diabetes (T1D) management is limited by hypoxia-related graft attrition and need for systemic immunosuppression. To overcome these challenges, we developed the Neovascularized Implantable Cell Homing and Encapsulation (NICHE) device, which integrates direct vascularization for facile mass transfer and localized immunosuppressant delivery for islet rejection prophylaxis. Here, we investigated NICHE efficacy for allogeneic islet transplantation and long-term diabetes reversal in an immunocompetent, male rat model. We demonstrated that allogeneic islets transplanted within pre-vascularized NICHE were engrafted, revascularized, and functional, reverting diabetes in rats for over 150 days. Notably, we confirmed that localized immunosuppression prevented islet rejection without inducing toxicity or systemic immunosuppression. Moreover, for translatability efforts, we showed NICHE biocompatibility and feasibility of deployment as well as short-term allogeneic islet engraftment in an MHC-mismatched nonhuman primate model. In sum, the NICHE holds promise as a viable approach for safe and effective islet transplantation and long-term T1D management.
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Affiliation(s)
- Jesus Paez-Mayorga
- grid.63368.380000 0004 0445 0041Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX USA ,grid.419886.a0000 0001 2203 4701School of Medicine and Health Sciences, Tecnologico de Monterrey, Monterrey, NL Mexico
| | - Jocelyn Nikita Campa-Carranza
- grid.63368.380000 0004 0445 0041Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX USA ,grid.419886.a0000 0001 2203 4701School of Medicine and Health Sciences, Tecnologico de Monterrey, Monterrey, NL Mexico
| | - Simone Capuani
- grid.63368.380000 0004 0445 0041Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX USA ,grid.410726.60000 0004 1797 8419University of the Chinese Academy of Sciences (UCAS), Shijingshan, Beijing, China
| | - Nathanael Hernandez
- grid.63368.380000 0004 0445 0041Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX USA
| | - Hsuan-Chen Liu
- grid.63368.380000 0004 0445 0041Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX USA
| | - Corrine Ying Xuan Chua
- grid.63368.380000 0004 0445 0041Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX USA
| | - Fernanda Paola Pons-Faudoa
- grid.63368.380000 0004 0445 0041Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX USA
| | - Gulsah Malgir
- grid.63368.380000 0004 0445 0041Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX USA
| | - Bella Alvarez
- grid.63368.380000 0004 0445 0041Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX USA ,grid.419886.a0000 0001 2203 4701School of Medicine and Health Sciences, Tecnologico de Monterrey, Monterrey, NL Mexico
| | - Jean A. Niles
- grid.63368.380000 0004 0445 0041Center for Tissue Engineering, Houston Methodist Research Institute, Houston, TX USA
| | - Lissenya B. Argueta
- grid.63368.380000 0004 0445 0041Center for Tissue Engineering, Houston Methodist Research Institute, Houston, TX USA
| | - Kathryn A. Shelton
- grid.240145.60000 0001 2291 4776Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX USA
| | - Sarah Kezar
- grid.240145.60000 0001 2291 4776Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX USA
| | - Pramod N. Nehete
- grid.240145.60000 0001 2291 4776Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research, MD Anderson Cancer Center, Bastrop, TX USA ,grid.267308.80000 0000 9206 2401The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX USA
| | - Dora M. Berman
- grid.26790.3a0000 0004 1936 8606Diabetes Research Institute, University of Miami, Miami, FL USA ,grid.26790.3a0000 0004 1936 8606Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL USA
| | - Melissa A. Willman
- grid.26790.3a0000 0004 1936 8606Diabetes Research Institute, University of Miami, Miami, FL USA
| | - Xian C. Li
- grid.63368.380000 0004 0445 0041Department of Surgery, Houston Methodist Hospital, Houston, TX USA ,grid.63368.380000 0004 0445 0041Immunobiology and Transplant Science Center, Houston Methodist Hospital, Houston, TX USA
| | - Camillo Ricordi
- grid.26790.3a0000 0004 1936 8606Diabetes Research Institute, University of Miami, Miami, FL USA
| | - Joan E. Nichols
- grid.63368.380000 0004 0445 0041Center for Tissue Engineering, Houston Methodist Research Institute, Houston, TX USA ,grid.63368.380000 0004 0445 0041Department of Surgery, Houston Methodist Hospital, Houston, TX USA
| | - A. Osama Gaber
- grid.63368.380000 0004 0445 0041Department of Surgery, Houston Methodist Hospital, Houston, TX USA
| | - Norma S. Kenyon
- grid.26790.3a0000 0004 1936 8606Diabetes Research Institute, University of Miami, Miami, FL USA ,grid.26790.3a0000 0004 1936 8606Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL USA ,grid.26790.3a0000 0004 1936 8606Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL USA ,grid.26790.3a0000 0004 1936 8606Department of Biomedical Engineering, University of Miami, Miami, FL USA ,grid.26790.3a0000 0004 1936 8606Department of Biochemistry and Molecular Biology, University of Miami, Miami, FL USA
| | - Alessandro Grattoni
- grid.63368.380000 0004 0445 0041Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX USA ,grid.63368.380000 0004 0445 0041Department of Surgery, Houston Methodist Hospital, Houston, TX USA ,grid.26790.3a0000 0004 1936 8606Department of Biochemistry and Molecular Biology, University of Miami, Miami, FL USA ,grid.63368.380000 0004 0445 0041Department of Radiation Oncology, Houston Methodist Hospital, Houston, TX USA
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8
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Capuani S, Malgir G, Chua CYX, Grattoni A. Advanced Strategies to Thwart Foreign Body Response to Implantable Devices. Bioeng Transl Med 2022; 7:e10300. [PMID: 36176611 PMCID: PMC9472022 DOI: 10.1002/btm2.10300] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 01/21/2022] [Accepted: 01/24/2022] [Indexed: 11/10/2022] Open
Abstract
Mitigating the foreign body response (FBR) to implantable medical devices (IMDs) is critical for successful long‐term clinical deployment. The FBR is an inevitable immunological reaction to IMDs, resulting in inflammation and subsequent fibrotic encapsulation. Excessive fibrosis may impair IMDs function, eventually necessitating retrieval or replacement for continued therapy. Therefore, understanding the implant design parameters and their degree of influence on FBR is pivotal to effective and long lasting IMDs. This review gives an overview of FBR as well as anti‐FBR strategies. Furthermore, we highlight recent advances in biomimetic approaches to resist FBR, focusing on their characteristics and potential biomedical applications.
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Affiliation(s)
- Simone Capuani
- Department of Nanomedicine Houston Methodist Research Institute Houston TX USA
- University of Chinese Academy of Science (UCAS) 19 Yuquan Road Beijing China
| | - Gulsah Malgir
- Department of Nanomedicine Houston Methodist Research Institute Houston TX USA
- Department of Biomedical Engineering University of Houston Houston TX USA
| | | | - Alessandro Grattoni
- Department of Nanomedicine Houston Methodist Research Institute Houston TX USA
- Department of Surgery Houston Methodist Hospital Houston TX USA
- Department of Radiation Oncology Houston Methodist Hospital Houston TX USA
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9
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Viswanath DI, Liu HC, Capuani S, Vander Pol R, Saunders S, Chua CYX, Grattoni A. Engineered implantable vaccine platform for continuous antigen-specific immunomodulation. Biomaterials 2022; 281:121374. [PMID: 35066287 PMCID: PMC8865051 DOI: 10.1016/j.biomaterials.2022.121374] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 01/03/2022] [Accepted: 01/12/2022] [Indexed: 02/03/2023]
Abstract
Cancer vaccines harness the host immune system to generate antigen-specific antitumor immunity for long-term tumor elimination with durable immunomodulation. Commonly investigated strategies reintroduce ex vivo autologous dendritic cells (DCs) but have limited clinical adoption due to difficulty in manufacturing, delivery and low clinical efficacy. To combat this, we designed the "NanoLymph", an implantable subcutaneous device for antigen-specific antitumor immunomodulation. The NanoLymph consists of a dual-reservoir platform for sustained release of immune stimulants via a nanoporous membrane and hydrogel-encapsulated antigens for local immune cell recruitment and activation, respectively. Here, we present the development and characterization of the NanoLymph as well as efficacy validation for immunomodulation in an immunocompetent murine model. Specifically, we established the NanoLymph biocompatibility and mechanical stability. Further, we demonstrated minimally invasive transcutaneous refilling of the drug reservoir in vivo for prolonging drug release duration. Importantly, our study demonstrated that local elution of two drugs (GMCSF and Resiquimod) generates an immune stimulatory microenvironment capable of local DC recruitment and activation and generation of antigen-specific T lymphocytes within 14 days. In summary, the NanoLymph approach can achieve in situ immunomodulation, presenting a viable strategy for therapeutic cancer vaccines.
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Affiliation(s)
- Dixita Ishani Viswanath
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA,Texas A&M University College of Medicine, Bryan & Houston, TX, USA
| | - Hsuan-Chen Liu
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Simone Capuani
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA,University of Chinese Academy of Science (UCAS), Shijingshan, 19 Yuquan Road, Beijing 100049, China
| | - Robin Vander Pol
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Shani Saunders
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Corrine Ying Xuan Chua
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA,Corresponding authors: Dr. Corrine Ying Xuan Chua, Assistant Professor, Department of Nanomedicine, Houston Methodist Research Institute, 6670 Bertner Avenue, R8-111, Houston TX, 77030. . Tel.: +1(713) 441-2560; Dr. Alessandro Grattoni, Chair, Department of Nanomedicine, Houston Methodist Research Institute, 6670 Bertner Avenue, R8-111, Houston TX, 77030. Tel.: +1 (713) 441-7324
| | - Alessandro Grattoni
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA,Department of Surgery, Houston Methodist Hospital, Houston, TX, USA,Department of Radiation Oncology, Houston Methodist Hospital, Houston, TX, USA,Corresponding authors: Dr. Corrine Ying Xuan Chua, Assistant Professor, Department of Nanomedicine, Houston Methodist Research Institute, 6670 Bertner Avenue, R8-111, Houston TX, 77030. . Tel.: +1(713) 441-2560; Dr. Alessandro Grattoni, Chair, Department of Nanomedicine, Houston Methodist Research Institute, 6670 Bertner Avenue, R8-111, Houston TX, 77030. Tel.: +1 (713) 441-7324
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10
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Stagno V, Egizi F, Corticelli F, Morandi V, Valle F, Costantini G, Longo S, Capuani S. Microstructural features assessment of different waterlogged wood species by NMR diffusion validated with complementary techniques. Magn Reson Imaging 2021; 83:139-151. [PMID: 34454984 DOI: 10.1016/j.mri.2021.08.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 07/27/2021] [Accepted: 08/25/2021] [Indexed: 12/13/2022]
Abstract
Wood is a hygroscopic, multi-scale and anisotropic natural material composed of pores with different size and differently oriented. In particular, archaeologically excavated wood generally is waterlogged wood with very high moisture content (400%-800%) that need to have a rapid investigation at the microstructural level to obtain the best treatment with preservative agents. Time-dependent diffusion coefficient D(t) quantified by Pulse Field Gradient (PFG) Nuclear Magnetic Resonance (NMR) techniques provides useful information about complex porous media, such as the tortuosity (τ) describing pore connectivity and fluid transport through media, the average-pore size, the anisotropic degree (an). However, diffusion NMR is intrinsically limited since it is an indirect measure of medium microstructure and relies on inferences from models and estimation of relevant diffusion parameters. Therefore, it is necessary to validate the information obtained from NMR diffusion parameters through complementary investigations. In this work, the structures of five waterlogged wood species were studied by PFG of absorbed water. D(t) and τ of water diffusing along and perpendicular to vessels/tracheids main axes together with relaxation times and an were quantified. From these parameters, the pore sizes distribution and the wood microstructure characterization were obtained. Results among wood species were compared, validated and integrated by micro-imaging NMR (μ-MRI), environmental-scanning electron-microscope (ESEM) images, wood dry density and imbibition times measurement of all woods. The work suggests that an vs τ rather than the estimated pore size diversifies and characterize the different wood species. As a consequence diffusion-anisotropy vs tortuosity could be an alternative method to characterize and differentiate wood species of waterlogged wood when high resolution images (μ-MRI and ESEM) are not available. Moreover, the combined use of D(t) and micro-MRI expands the scale of dimensions observable by NMR covering all the interesting length scales of wood.
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Affiliation(s)
- V Stagno
- Department of Earth Sciences, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; National Research Council - Institute for Complex Systems (CNR-ISC) c/o Physics Department Sapienza University of Rome, Rome, Italy
| | - F Egizi
- National Research Council - Institute for Complex Systems (CNR-ISC) c/o Physics Department Sapienza University of Rome, Rome, Italy
| | - F Corticelli
- Consiglio Nazionale delle Ricerche - Istituto per la Microelettronica e Microsistemi (CNR-IMM) Bologna, P. Gobetti 101, 40129 Bologna, Italy
| | - V Morandi
- Consiglio Nazionale delle Ricerche - Istituto per la Microelettronica e Microsistemi (CNR-IMM) Bologna, P. Gobetti 101, 40129 Bologna, Italy
| | - F Valle
- Consiglio Nazionale delle Ricerche - Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) Bologna, P. Gobetti 101, 40129 Bologna, Italy
| | - G Costantini
- National Research Council - Institute for Complex Systems (CNR-ISC) c/o Physics Department Sapienza University of Rome, Rome, Italy
| | - S Longo
- National Research Council - Institute for Complex Systems (CNR-ISC) c/o Physics Department Sapienza University of Rome, Rome, Italy; Department of Mathematical and Computational Sciences, Physics Science and Earth Sciences (MIFT), University of Messina, Messina 98166, Italy
| | - S Capuani
- National Research Council - Institute for Complex Systems (CNR-ISC) c/o Physics Department Sapienza University of Rome, Rome, Italy; Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Piazza del Viminale 1, 00184 Rome, Italy.
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11
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Paez‐Mayorga J, Capuani S, Farina M, Lotito ML, Niles JA, Salazar HF, Rhudy J, Esnaola L, Chua CYX, Taraballi F, Corradetti B, Shelton KA, Nehete PN, Nichols JE, Grattoni A. Cell Encapsulation: Enhanced In Vivo Vascularization of 3D‐Printed Cell Encapsulation Device Using Platelet‐Rich Plasma and Mesenchymal Stem Cells (Adv. Healthcare Mater. 19/2020). Adv Healthc Mater 2020. [DOI: 10.1002/adhm.202070071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Paez-Mayorga J, Capuani S, Hernandez N, Farina M, Chua CYX, Blanchard R, Sizovs A, Liu HC, Fraga DW, Niles JA, Salazar HF, Corradetti B, Sikora AG, Kloc M, Li XC, Gaber AO, Nichols JE, Grattoni A. Neovascularized implantable cell homing encapsulation platform with tunable local immunosuppressant delivery for allogeneic cell transplantation. Biomaterials 2020; 257:120232. [DOI: 10.1016/j.biomaterials.2020.120232] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 07/08/2020] [Accepted: 07/09/2020] [Indexed: 01/10/2023]
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13
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Paez‐Mayorga J, Capuani S, Farina M, Lotito ML, Niles JA, Salazar HF, Rhudy J, Esnaola L, Chua CYX, Taraballi F, Corradetti B, Shelton KA, Nehete PN, Nichols JE, Grattoni A. Enhanced In Vivo Vascularization of 3D-Printed Cell Encapsulation Device Using Platelet-Rich Plasma and Mesenchymal Stem Cells. Adv Healthc Mater 2020; 9:e2000670. [PMID: 32864893 DOI: 10.1002/adhm.202000670] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 07/25/2020] [Indexed: 12/14/2022]
Abstract
The current standard for cell encapsulation platforms is enveloping cells in semipermeable membranes that physically isolate transplanted cells from the host while allowing for oxygen and nutrient diffusion. However, long-term viability and function of encapsulated cells are compromised by insufficient oxygen and nutrient supply to the graft. To address this need, a strategy to achieve enhanced vascularization of a 3D-printed, polymeric cell encapsulation platform using platelet-rich plasma (PRP) and mesenchymal stem cells (MSCs) is investigated. The study is conducted in rats and, for clinical translation relevance, in nonhuman primates (NHP). Devices filled with PRP, MSCs, or vehicle hydrogel are subcutaneously implanted in rats and NHP and the amount and maturity of penetrating blood vessels assessed via histopathological analysis. In rats, MSCs drive the strongest angiogenic response at early time points, with the highest vessel density and endothelial nitric oxide synthase (eNOS) expression. In NHP, PRP and MSCs result in similar vessel densities but incorporation of PRP ensues higher levels of eNOS expression. Overall, enrichment with PRP and MSCs yields extensive, mature vascularization of subcutaneous cell encapsulation devices. It is postulated that the individual properties of PRP and MSCs can be leveraged in a synergistic approach for maximal vascularization of cell encapsulation platforms.
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Affiliation(s)
- Jesus Paez‐Mayorga
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
- School of Medicine and Health Sciences Tecnologico de Monterrey Monterrey NL 64849 Mexico
| | - Simone Capuani
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
| | - Marco Farina
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
- Department of Electronics and Telecommunications Politecnico di Torino Torino TO 10129 Italy
| | - Maria Luisa Lotito
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
- Department of Mechanical and Aerospace Engineering Politecnico di Torino Torino TO 10129 Italy
| | - Jean A. Niles
- University of Texas Medical Branch Galveston TX 77550 USA
| | - Hector F. Salazar
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
| | - Jessica Rhudy
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
| | - Lucas Esnaola
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
| | | | - Francesca Taraballi
- Regenerative Medicine Program Houston Methodist Research Institute Houston TX 77030 USA
- Orthopedics and Sports Medicine Houston Methodist Hospital Houston TX 77030 USA
| | - Bruna Corradetti
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
- Center for NanoHealth Swansea University Medical School Swansea Wales SA2 8QA UK
| | - Kathryn A. Shelton
- Department of Comparative Medicine Michael E. Keeling Center for Comparative Medicine and Research MD Anderson Cancer Center Bastrop TX 78602 USA
| | - Pramod N. Nehete
- Department of Comparative Medicine Michael E. Keeling Center for Comparative Medicine and Research MD Anderson Cancer Center Bastrop TX 78602 USA
- The University of Texas Graduate School of Biomedical Sciences at Houston Houston TX 77030 USA
| | | | - Alessandro Grattoni
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
- Department of Surgery Houston Methodist Hospital Houston TX 77030 USA
- Department of Radiation Oncology Houston Methodist Hospital Houston TX 77030 USA
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14
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Sinibaldi R, Conti A, Sinjari B, Spadone S, Pecci R, Palombo M, Komlev VS, Ortore MG, Tromba G, Capuani S, Guidotti R, De Luca F, Caputi S, Traini T, Della Penna S. Multimodal-3D imaging based on μMRI and μCT techniques bridges the gap with histology in visualization of the bone regeneration process. J Tissue Eng Regen Med 2017; 12:750-761. [PMID: 28593731 DOI: 10.1002/term.2494] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 04/23/2017] [Accepted: 06/05/2017] [Indexed: 01/05/2023]
Abstract
Bone repair/regeneration is usually investigated through X-ray computed microtomography (μCT) supported by histology of extracted samples, to analyse biomaterial structure and new bone formation processes. Magnetic resonance imaging (μMRI) shows a richer tissue contrast than μCT, despite at lower resolution, and could be combined with μCT in the perspective of conducting non-destructive 3D investigations of bone. A pipeline designed to combine μMRI and μCT images of bone samples is here described and applied on samples of extracted human jawbone core following bone graft. We optimized the coregistration procedure between μCT and μMRI images to avoid bias due to the different resolutions and contrasts. Furthermore, we used an Adaptive Multivariate Clustering, grouping homologous voxels in the coregistered images, to visualize different tissue types within a fused 3D metastructure. The tissue grouping matched the 2D histology applied only on 1 slice, thus extending the histology labelling in 3D. Specifically, in all samples, we could separate and map 2 types of regenerated bone, calcified tissue, soft tissues, and/or fat and marrow space. Remarkably, μMRI and μCT alone were not able to separate the 2 types of regenerated bone. Finally, we computed volumes of each tissue in the 3D metastructures, which might be exploited by quantitative simulation. The 3D metastructure obtained through our pipeline represents a first step to bridge the gap between the quality of information obtained from 2D optical microscopy and the 3D mapping of the bone tissue heterogeneity and could allow researchers and clinicians to non-destructively characterize and follow-up bone regeneration.
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Affiliation(s)
- R Sinibaldi
- Department of Neuroscience, Imaging and Clinical Sciences, G. D'Annunzio University of Chieti-Pescara, Chieti, Italy
- Multimodal3D s.r.l., Rome, Italy
| | - A Conti
- Department of Neuroscience, Imaging and Clinical Sciences, G. D'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - B Sinjari
- Department of Medical and Oral Sciences and Biotechnologies, G. D'Annunzio University of Chieti and Pescara, Chieti, Italy
| | - S Spadone
- Department of Neuroscience, Imaging and Clinical Sciences, G. D'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - R Pecci
- Department of Technologies and Health, Istituto Superiore di Sanità, Rome, Italy
| | - M Palombo
- Department of Physics, Sapienza University of Rome, Rome, Italy
- CEA/DSV/I2BM, MIRCen, Fontenay-aux-Roses, France
| | - V S Komlev
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, Russian Federation
| | - M G Ortore
- Department of Life and Environmental Science, Marche Polytechnic University, Ancona, Italy
| | - G Tromba
- Elettra Sincrotrone Trieste, Trieste, Italy
| | - S Capuani
- CNR (Institute for Complex Systems) c/o Physics Department Sapienza University of Rome, Rome, Italy
| | - R Guidotti
- Department of Neuroscience, Imaging and Clinical Sciences, G. D'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - F De Luca
- Department of Physics, Sapienza University of Rome, Rome, Italy
| | - S Caputi
- Department of Medical and Oral Sciences and Biotechnologies, G. D'Annunzio University of Chieti and Pescara, Chieti, Italy
| | - T Traini
- Department of Medical and Oral Sciences and Biotechnologies, G. D'Annunzio University of Chieti and Pescara, Chieti, Italy
| | - S Della Penna
- Department of Neuroscience, Imaging and Clinical Sciences, G. D'Annunzio University of Chieti-Pescara, Chieti, Italy
- Institute for Advanced Biomedical Technologies, G. D'Annunzio University of Chieti-Pescara, Chieti, Italy
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15
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Caporale A, Palombo M, Macaluso E, Guerreri M, Bozzali M, Capuani S. The γ-parameter of anomalous diffusion quantified in human brain by MRI depends on local magnetic susceptibility differences. Neuroimage 2016; 147:619-631. [PMID: 28011255 DOI: 10.1016/j.neuroimage.2016.12.051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 11/22/2016] [Accepted: 12/19/2016] [Indexed: 12/15/2022] Open
Abstract
Motivated by previous results obtained in vitro, we investigated the dependence of the anomalous diffusion (AD) MRI technique on local magnetic susceptibility differences (Δχ) driven by magnetic field inhomogeneity in human brains. The AD-imaging contrast investigated here is quantified by the stretched-exponential parameter γ, extracted from diffusion weighted (DW) data collected by varying diffusion gradient strengths. We performed T2* and DW experiments in eight healthy subjects at 3.0T. T2*-weighted images at different TEs=(10,20,35,55)ms and DW-EPI images with fourteen b-values from 0 to 5000s/mm2 were acquired. AD-metrics and Diffusion Tensor Imaging (DTI) parameters were compared and correlated to R2* and to Δχ values taken from literature for the gray (GM) and the white (WM) matter. Pearson's correlation test and Analysis of Variance with Bonferroni post-hoc test were used. Significant strong linear correlations were found between AD γ-metrics and R2* in both GM and WM of the human brain, but not between DTI-metrics and R2*. Depending on Δχ driven magnetic field inhomogeneity, the new contrast provided by AD-γ imaging reflects Δχ due to differences in myelin orientation and iron content within selected regions in the WM and GM, respectively. This feature of the AD-γ imaging due to the fact that γ is quantified by using MRI, may be an alternative strategy to investigate, at high magnetic fields, microstructural changes in myelin, and alterations due to iron accumulation. Possible clinical applications might be in the field of neurodegenerative diseases.
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Affiliation(s)
- A Caporale
- Morpho-functional Sciences, Department of Anatomical, Histological, Forensic and of the Locomotor System Science, Sapienza University of Rome, Italy; CNR ISC UOS Roma Sapienza, Physics Department Sapienza University of Rome, Rome, Italy.
| | - M Palombo
- CNR ISC UOS Roma Sapienza, Physics Department Sapienza University of Rome, Rome, Italy; MIRCen, CEA/DSV/I(2)BM, Fontenay-aux-Roses, France
| | - E Macaluso
- ImpAct Team, Lyon Neuroscience Research Center, Lyon, France
| | - M Guerreri
- CNR ISC UOS Roma Sapienza, Physics Department Sapienza University of Rome, Rome, Italy; Morphogenesis & Tissue Engineering, Department of Anatomical, Histological, Forensic and of the Locomotor System Science, Sapienza University of Rome, Italy
| | - M Bozzali
- Neuroimaging Laboratory Santa Lucia Foundation, Rome, Italy
| | - S Capuani
- CNR ISC UOS Roma Sapienza, Physics Department Sapienza University of Rome, Rome, Italy
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Porcari P, Hegi ME, Lei H, Hamou MF, Vassallo I, Capuani S, Gruetter R, Mlynarik V. Early detection of human glioma sphere xenografts in mouse brain using diffusion MRI at 14.1 T. NMR Biomed 2016; 29:1577-1589. [PMID: 27717037 DOI: 10.1002/nbm.3610] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 07/09/2016] [Accepted: 07/28/2016] [Indexed: 06/06/2023]
Abstract
Glioma models have provided important insights into human brain cancers. Among the investigative tools, MRI has allowed their characterization and diagnosis. In this study, we investigated whether diffusion MRI might be a useful technique for early detection and characterization of slow-growing and diffuse infiltrative gliomas, such as the proposed new models, LN-2669GS and LN-2540GS glioma sphere xenografts. Tumours grown in these models are not visible in conventional T2 -weighted or contrast-enhanced T1 -weighted MRI at 14.1 T. Diffusion-weighted imaging and diffusion tensor imaging protocols were optimized for contrast by exploring long diffusion times sensitive for probing the microstructural alterations induced in the normal brain by the slow infiltration of glioma sphere cells. Compared with T2 -weighted images, tumours were properly identified in their early stage of growth using diffusion MRI, and confirmed by localized proton MR spectroscopy as well as immunohistochemistry. The first evidence of tumour presence was revealed for both glioma sphere xenograft models three months after tumour implantation, while no necrosis, oedema or haemorrhage were detected either by MRI or by histology. Moreover, different values of diffusion indices, such as mean diffusivity and fractional anisotropy, were obtained in tumours grown from LN-2669GS and LN-2540GS glioma sphere lines. These observations highlighted diverse tumour microstructures for both xenograft models, which were reflected in histology. This study demonstrates the ability of diffusion MRI techniques to identify and investigate early stages of slow-growing, invasive tumours in the mouse brain, thus providing a potential imaging biomarker for early detection of tumours in humans.
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Affiliation(s)
- P Porcari
- Centre for Biomedical Imaging, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
- Newcastle Magnetic Resonance Centre, Newcastle University, Newcastle, Upon Tyne, UK.
| | - M E Hegi
- Laboratory of Brain Tumor Biology and Genetics, Service of Neurosurgery and Neuroscience Research Centre, Department of Clinical Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - H Lei
- Centre for Biomedical Imaging, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Department of Radiology, University of Geneva (UNIGE), Geneva, Switzerland
| | - M-F Hamou
- Laboratory of Brain Tumor Biology and Genetics, Service of Neurosurgery and Neuroscience Research Centre, Department of Clinical Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - I Vassallo
- Laboratory of Brain Tumor Biology and Genetics, Service of Neurosurgery and Neuroscience Research Centre, Department of Clinical Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - S Capuani
- CNR-ISC UOS Roma Sapienza, Physics Department, Sapienza University of Rome, Rome, Italy
| | - R Gruetter
- Centre for Biomedical Imaging, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Department of Radiology, University of Geneva (UNIGE), Geneva, Switzerland
- Department of Radiology, University of Lausanne, Lausanne, Switzerland
- LIFMET, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - V Mlynarik
- Centre for Biomedical Imaging, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- High Field MR Center, Medical University of Vienna, Vienna, Austria
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17
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Nezzo M, Di Trani M, Caporale A, Miano R, Mauriello A, Bove P, Capuani S, Manenti G. Mean diffusivity discriminates between prostate cancer with grade group 1&2 and grade groups equal to or greater than 3. Eur J Radiol 2016; 85:1794-1801. [DOI: 10.1016/j.ejrad.2016.08.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 06/28/2016] [Accepted: 08/01/2016] [Indexed: 11/17/2022]
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Palombo M, Gabrielli A, De Santis S, Cametti C, Ruocco G, Capuani S. Spatio-temporal anomalous diffusion in heterogeneous media by nuclear magnetic resonance. J Chem Phys 2011; 135:034504. [DOI: 10.1063/1.3610367] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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De Santis S, Gabrielli A, Bozzali M, Maraviglia B, Macaluso E, Capuani S. Anisotropic anomalous diffusion assessed in the human brain by scalar invariant indices. Magn Reson Med 2010; 65:1043-52. [DOI: 10.1002/mrm.22689] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Revised: 08/27/2010] [Accepted: 09/26/2010] [Indexed: 11/07/2022]
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De Santis S, Rebuzzi M, Di Pietro G, Fasano F, Maraviglia B, Capuani S. In vitroandin vivoMR evaluation of internal gradient to assess trabecular bone density. Phys Med Biol 2010; 55:5767-85. [DOI: 10.1088/0031-9155/55/19/010] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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21
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Porcari P, Capuani S, D'Amore E, Lecce M, La Bella A, Fasano F, Migneco LM, Campanella R, Maraviglia B, Pastore FS. In vivo 19F MR imaging and spectroscopy for the BNCT optimization. Appl Radiat Isot 2009; 67:S365-8. [PMID: 19375924 DOI: 10.1016/j.apradiso.2009.03.065] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The aim of this study was to evaluate in vivo the boron biodistribution and pharmacokinetics of 4-borono-2-fluorophenylalanine ((19)F-BPA) using (19)F MR Imaging ((19)F MRI) and Spectroscopy ((19)F MRS). The correlation between the results obtained by both techniques, (19)F MRI on rat brain and (19)F MRS on blood samples, showed the maximum (19)F-BPA uptake in C6 glioma model at 2.5h after infusion determining the optimal irradiation time. Moreover, the effect of L-DOPA as potential enhancer of (19)F-BPA tumour intake was assessed using (19)F MRI.
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Affiliation(s)
- P Porcari
- CNR-INFM SOFT, Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, Rome, Italy.
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22
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Capuani S, Gili T, Bozzali M, Russo S, Porcari P, Cametti C, Muolo M, D'Amore E, Maraviglia B, Lazzarino G, Pastore FS. Boronophenylalanine uptake in C6 glioma model is dramatically increased by L-DOPA preloading. Appl Radiat Isot 2009; 67:S34-6. [PMID: 19375337 DOI: 10.1016/j.apradiso.2009.03.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
One of the main limitations for BNCT effectiveness is the insufficient intake of (10)B nuclei within tumour cells. This work was aimed at investigating the use of L-DOPA as enhancer for boronophenylalanine (BPA) uptake in the C6 glioma model. The investigation was first performed in vitro, and then extended in vivo to the animal model. BPA accumulation in C6 glioma cells was assessed, using radiowave dielectric spectroscopy (RDS), with and without L-DOPA preloading. C6 glioma cells were also implanted in the brain of 25 rats, randomly assigned to two experimental branches: (1) intra-carotid BPA infusion; (2) intra-carotid BPA infusion after pre-treatment with L-DOPA, administrated 24 h before BPA infusion. All animals were sacrificed, and assessment of BPA concentrations in tumour tissue, normal brain, and blood samples was performed using high performance liquid chromatography (HPLC). L-DOPA preloading induced a massive increase of BPA concentration either in vitro on C6 glioma cells or in vivo in the animal model tumour. Moreover, no significant difference was found in the normal brain and blood samples between the two animal groups. This study suggests the potential use of L-DOPA as enhancer for BPA accumulation in malignant gliomas eligible for BNCT.
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Affiliation(s)
- S Capuani
- CNR-INFM SOFT, Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, Rome, Italy.
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23
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Gili T, Capuani S, Maraviglia B. Nonergodic Arrested State in Diluted Clay Suspensions Monitored by Triple-Quantum 23Na Nuclear Magnetic Resonance. J Phys Chem B 2007; 111:7092-7. [PMID: 17536852 DOI: 10.1021/jp070533v] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The aging of water suspension of the synthetic clay Laponite has been studied by liquid-state triple-quantum filter nuclear magnetic resonance techniques, in a range of clay weight concentration (Cw = 0.012-0.028) known as the isotropic phase. Counterions dynamic parameters (rotational correlation time tauc and quadrupolar coupling constant e2qQ/h) have been extracted from sodium triple-quantum filtered experimental data within the multi-exponential quadrupolar relaxation theory in the fast exchange approximation. By monitoring quadrupolar sodium ions dynamical (tauc and e2qQ/h) and static (counterion concentration pb) properties during the aging, we find two different mechanisms of transition toward an arrested state. Our experimental findings match with the description which states, at low concentration, the formation of clusters of Laponite disks trigger the reaching of the arrested state, while at high concentration, single disks are the basic units of the arrested phase. The procedure proposed in this paper, based on multiple quantum filtered NMR data analysis, results to be a useful means to study the routes to arrested states in aqueous colloidal dispersions.
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Affiliation(s)
- T Gili
- CNR-INFM CRS-SOFT, UniversitA di Roma La Sapienza, Roma, Italy.
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24
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Capuani S, Rebuzzi M, Hagberg G, Maraviglia B. Evaluation of spongy bone tissue internal gradients by means of spin-echo decay measurements. Magn Reson Imaging 2007. [DOI: 10.1016/j.mri.2007.01.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Capuani S, Rossi C, Alesiani M, Maraviglia B. Diffusion tensor imaging to study anisotropy in a particular porous system: the trabecular bone network. Solid State Nucl Magn Reson 2005; 28:266-72. [PMID: 16360582 DOI: 10.1016/j.ssnmr.2005.11.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2005] [Indexed: 05/05/2023]
Abstract
During the last decade, considerable effort has been invested into the development of diffusion tensor imaging (DTI) mainly used to investigate cerebral morphology. The aim of this paper is to review and to discuss our recent results about high magnetic field DTI application to study spongy bone tissue. Due to its peculiar properties, spongy bone represents a particular porous system sample. Strategies to perform DTI on porous systems and issues linked to DTI outcome interpretation are presented on the basis of our results concerning trabecular bone network characterization.
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Affiliation(s)
- S Capuani
- CNR-INFM CRS-SOFT c/o Università di Roma La Sapienza, P.zle A. Moro 2, I-00185 Roma, Italy
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26
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Abstract
The purpose of this paper is to investigate NMR applications to porous materials widely employed in artistic and historical monuments and largely studied in the Cultural Heritage conservation field. Carrara marble, Candoglia marble and travertine samples were studied and data from relaxation times measurements were compared. Very interesting results from treated samples are reported and explained under the structure related spin lattice relaxation time point of view. Images of Carrara marble aged sample (XIX century), coming from the Florence Cathedral obtained for short absorption time of water by capillary rise and for relatively small thickness slices together show the fluid's spatial distribution within the stone. Comparative images showing untreated sample with the treated ones were obtained suggesting very useful applications for the determination of treatment effectiveness.
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Affiliation(s)
- M Alesiani
- Istituto Nazionale Fisica della Materia UdR Roma1 and Physics Department University La Sapienza, 00185, Roma, Italy
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Capuani S, Alesiani M, Branca RT, Maraviglia B. New openings for porous systems research from intermolecular double-quantum NMR. Solid State Nucl Magn Reson 2004; 25:153-159. [PMID: 14698403 DOI: 10.1016/j.ssnmr.2003.03.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
It has been recently recognized that residual intermolecular double-quantum coherences (iDQcs) provide a novel contrast mechanism to study heterogeneity in liquid systems. This is of much interest in the field of the physics of matter and biomedicine. Nowadays, literature concerning the behaviour of the iDQc signal originated by highly heterogeneous systems such as fluids in porous media is scarce. In this paper, we report and discuss our principal results about iDQc signal behaviour in confined liquid systems (trabecular bone, travertine, porous standard systems) and also some new results obtained on doped water in glass capillary pipes.
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Affiliation(s)
- S Capuani
- Department of Physics, University "La Sapienza", Rome, Italy
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Fasano F, Capuani S, Hagberg GE, Branca T, Indovina I, Castriota-Scanderbeg A, Maraviglia B. Intermolecular double quantum coherences (iDQc) and diffusion-weighted imaging (DWI) imaging of the human brain at 1.5 T. Magn Reson Imaging 2003; 21:1151-7. [PMID: 14725922 DOI: 10.1016/j.mri.2003.08.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
To study the sensitivity of intermolecular double quantum coherences (iDQc) imaging contrast to brain microstructure and brain anisotropy, we investigated the iDQC contrast between differently structured areas of the brain according to the strength and the direction of the applied correlation gradient. Thus diffusion-weighted imaging (DWI) and diffusion tensor imaging (DTI) maps have been obtained. This procedure, which consists of analyzing both iDQc and DWI images at different gradient strength and gradient direction, could be a promising tool for clinical brain investigations performed with higher than 1.5 T magnetic fields.
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Affiliation(s)
- F Fasano
- Laboratory of Functional Neuroimaging, Fondazione Santa Lucia, IRCCS, 00179 Rome, Italy
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29
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Abstract
In heterogeneous systems the amplitude of the intermolecular double-quantum (DQ) signal depends on sample heterogeneity over a correlation distance dc=pi/(gammaGct). In this paper two different CRAZED-type sequences were applied in a porous medium phantom. One of these sequences gives rise to a DQ-T2 weighted signal, while the other one gives rise to a DQ-T2* weighted signal. Experimental results indicate that tuning of the correlation distance dc in a porous medium can alter the DQ signal in a manner which depends on the microstructure. This is evident only using the CRAZED-type sequence which gives rise to a DQ-T2* weighted signal.
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Affiliation(s)
- S Capuani
- Physics Department 'La Sapienza' University, and INFM UdR Roma1, P.le A. Moro 5, 00185 Rome, Italy
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30
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Abstract
Nuclear Magnetic Resonance was employed to obtain information on the pore filling during the absorption process. A porous carbonate stone, largely employed for buildings and mainly outdoor decorations was studied during water absorption by capillary rise, and filled pores radii were evaluated by comparison between experimental and theoretical parametric magnetization decay curves. Non mono-exponential T2 allowed spin populations to be split among the associated different relaxation times.
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Affiliation(s)
- M Alesiani
- Physics Department La Sapienza University, and INFM UdR Roma1, P.le A. Moro 5, 00185 Roma, Italy
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Capuani S, Hagberg G, Fasano F, Indovina I, Castriota-Scanderbeg A, Maraviglia B. In vivo multiple spin echoes imaging of trabecular bone on a clinical 1.5 T MR scanner. Magn Reson Imaging 2002; 20:623-9. [PMID: 12467872 DOI: 10.1016/s0730-725x(02)00589-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
In vivo multiple spin echoes (MSE) images of bone marrow in trabecular bone were obtained for the first time on a clinical 1.5 T scanner. Despite of a reduced sensitivity of the MSE trabecular bone images with respect to the cerebral matter ones, it is possible to observe some features in the MSE trabecular bone images that may be useful in the diagnosis of osteopenic states. Two different CRAZED-type MSE imaging sequences based on spin-echo and EPI imaging modalities were applied in phantom and in vivo. Preliminary experimental results indicate that EPI imaging readout seems to conceal the MSE contrast correlated with pore dimension in porous media. However it is still possible to detect anisotropy effects related to the bone structure in MSE-EPI images. Some strategies are suggested to optimize the quality of MSE trabecular bone images.
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Affiliation(s)
- S Capuani
- Istituto Nazionale Fisica della Materia (INFM) UdR Roma1, E. Fermi Center and Physics Department University La Sapienza, Italy
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Capuani S, Gili T, Cametti C, Maraviglia B, Colasanti M, Muolo M, Venturini G. Radiowave dielectric investigation of boron compounds distribution in cultured tumour cells: relevance to boron neutron capture therapy. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)00806-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Abstract
Dipolar interactions in liquids have recently offered a new challenge to investigate porous media by exploiting intermolecular quantum coherences, which are obtained through a simple two-pulse sequence (90 degrees -tau-120 degrees ). This sequence, in the presence of an external gradient (G), refocuses a train of echoes at multiple integer values of time tau. The first and second echo amplitudes are acquired for heterogeneous systems such as porous media at different time values (tau). In our first experiments on bovine bone samples we have observed unpredicted dips on the second echo time behavior. We argue that a strict relation occurs between the average pore dimensions and the dips time position through the correlation distance d=pi/(gamma G tau) (defined as half a cycle of the magnetization helix, which originates in the presence of an external gradient). Although the experimental results have revealed an exceptional connection between the porous structure and the correlation distance, no physical explanation was so far provided. In this paper we propose a possible physical cause of the observed phenomenon. In addition we report an accurate analysis of new experiments performed on glass beads phantoms, which confirms our conclusions.
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Affiliation(s)
- F M Alessandri
- Dipartimento di Fisica, Università di Roma "La Sapienza,", 00185 Rome, Italy
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Abstract
We report a simple and efficient MR method for the evaluation of trabecular bone quality. This technique is based on detection and imaging of Multiple Spin-Echoes (MSE), a manifestation of the dipolar field generated by residual intermolecular dipolar couplings in liquids. In the particular implementation we have used, originally proposed by Bowtell [J. Magn. Reson. 100 (1992) 1; J. Magn. Reson. 88 (1990) 643; Phys. Rev. Lett. 76 (1996) 4971], multiple spin echoes (MSE) are refocused in a two-pulse experiment in the presence of a correlation linear magnetic field gradient G(c). This gradient generates a magnetisation helix and results in the spatial modulation of the sample magnetisation. In heterogeneous systems, the amplitude of the MSE signal depends on sample heterogeneity over a distance d=pi/(gammaG(c)tau) which is half a cycle of the magnetisation helix, thus providing a novel contrast mechanism that can be tuned to a specific length scale. We have exploited this mechanism to study young bovine trabecular bone samples ex-vivo. We show that MSE images present a different contrast from conventional MR images, and that, by varying the experimental parameters, the image contrast can be related to specific trabecular pore sizes. The potential of this technique for the early diagnosis of osteoporotic diseases is discussed.
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Affiliation(s)
- S Capuani
- Physics Department, Istituto Nazionale Fisica della Materia UdR Roma1, University La Sapienza Piazzale, Aldo Moro 2, 00185, Rome, Italy
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Abstract
A multiple spin-echo (MSE) sequence has been applied for the first time to study trabecular bone ex vivo. The second echo generated by the demagnetizing field presents discrete drops in signal intensity for certain values of the pitch of the magnetization helix created by the correlation gradient. These dips may reflect characteristic pore sizes in the trabecular bone specimens. This hypothesis is supported by similar experiments performed on a phantom with uniform pore size distribution. Trabecular bone images weighted in the MSE contrast mechanism are reported.
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Affiliation(s)
- S Capuani
- Istituto Nazionale Fisica della Materia UdR Roma1 and Dipartimento di Fisica, Università di Roma La Sapienza, 00185 Rome, Italy
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Nosel W, Capuani S, Capitani D, De Luca F. Effects of higher rank multipoles on relaxation of an I = 3 spin system. J Magn Reson 2001; 150:178-183. [PMID: 11384178 DOI: 10.1006/jmre.2001.2339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Magnetic multipoles of rank higher than one become active in spin systems with I > 1/2 and their contribution to relaxation depends on dynamics. The appearance of multipole terms complicates the relaxation description and supports the multiexponential behavior of relaxation. In this paper the effects of high-rank multipoles on lineshape and longitudinal relaxation of I = 3 spin systems are presented. Results obtained from both numerical simulation and experimental data show that longitudinal and transverse relaxation are strongly influenced by these multipole terms, especially at lower temperature where, due to lower molecular mobility, the extreme narrowing condition is not fulfilled.
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Affiliation(s)
- W Nosel
- Marian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kracow, Poland
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Abstract
In this paper we discuss the possibility of modifying the multiple spin echoes existing theory, developed for a homogeneous system, to describe also an inhomogeneous system such as a porous medium. We report here the first experimental application of MSE methods to materials like travertine. The ratio A(2)/A(1) from water in travertine presents minima for characteristic values of the delay time tau, like what was previously observed in the trabecular bone. By a judicious choice of the delay time tau and of the G gradient strength, the MSE sequence can be made sensitive to a specific length-scale of the sample heterogeneity. Furthermore the MSE image shows a particular new contrast that makes the non linear NMR method very attractive for the assessment of variations of the porous structure in porous systems.
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Affiliation(s)
- S Capuani
- Istituto Nazionale Fisica della Materia (INFM) UdR Roma 1 and Physics Department, University "La Sapienza", 00185, Roma, Italy
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Abstract
The two-dimensional FT Imaging of 13C-glucose obtained with twin spin-echo double resonance sequence is presented. The images have been obtained by a doubly tuned surface coil on samples containing water and 13C-enriched glucose in water. It is shown, both theoretically and experimentally, that the whole editing capability of the twin spin-echo double resonance imaging sequence is also preserved in the presence of the radiofrequency field inhomogeneity produced by the surface coil. As in an efficient selective irradiation method, the enhancement in the signal-to-noise ratio with respect to the direct 13C detection, depends on the number of protons J-coupled to 13C.
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Affiliation(s)
- S Capuani
- Dipartimento di Fisica, Università La Sapienza, Roma, Italy
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43
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Capuani S, De Luca F, Maraviglia B. Product-operator formalism in I⩾1/2 and S⩾3/2 J-coupled nuclear spins: Application to J assessment via SEDOR experiment. J Chem Phys 1998. [DOI: 10.1063/1.477308] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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