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Rodriguez NJ, Furniss CS, Yurgelun MB, Ukaegbu C, Constantinou PE, Fortes I, Caruso A, Schwartz AN, Stopfer JE, Underhill-Blazey M, Kenner B, Nelson SH, Okumura S, Zhou AY, Coffin TB, Uno H, Horiguchi M, Ocean AJ, McAllister F, Lowy AM, Klein AP, Madlensky L, Petersen GM, Garber JE, Lippman SM, Goggins MG, Maitra A, Syngal S. A Randomized Trial of Two Remote Health Care Delivery Models on the Uptake of Genetic Testing and Impact on Patient-Reported Psychological Outcomes in Families With Pancreatic Cancer: The Genetic Education, Risk Assessment, and Testing (GENERATE) Study. Gastroenterology 2024; 166:872-885.e2. [PMID: 38320723 PMCID: PMC11034726 DOI: 10.1053/j.gastro.2024.01.042] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 01/22/2024] [Accepted: 01/29/2024] [Indexed: 02/15/2024]
Abstract
BACKGROUND & AIMS Genetic testing uptake for cancer susceptibility in family members of patients with cancer is suboptimal. Among relatives of patients with pancreatic ductal adenocarcinoma (PDAC), The GENetic Education, Risk Assessment, and TEsting (GENERATE) study evaluated 2 online genetic education/testing delivery models and their impact on patient-reported psychological outcomes. METHODS Eligible participants had ≥1 first-degree relative with PDAC, or ≥1 first-/second-degree relative with PDAC with a known pathogenic germline variant in 1 of 13 PDAC predisposition genes. Participants were randomized by family, between May 8, 2019, and June 1, 2021. Arm 1 participants underwent a remote interactive telemedicine session and online genetic education. Arm 2 participants were offered online genetic education only. All participants were offered germline testing. The primary outcome was genetic testing uptake, compared by permutation tests and mixed-effects logistic regression models. We hypothesized that Arm 1 participants would have a higher genetic testing uptake than Arm 2. Validated surveys were administered to assess patient-reported anxiety, depression, and cancer worry at baseline and 3 months postintervention. RESULTS A total of 424 families were randomized, including 601 participants (n = 296 Arm 1; n = 305 Arm 2), 90% of whom completed genetic testing (Arm 1 [87%]; Arm 2 [93%], P = .014). Arm 1 participants were significantly less likely to complete genetic testing compared with Arm 2 participants (adjusted ratio [Arm1/Arm2] 0.90, 95% confidence interval 0.78-0.98). Among participants who completed patient-reported psychological outcomes questionnaires (Arm 1 [n = 194]; Arm 2 [n = 206]), the intervention did not affect mean anxiety, depression, or cancer worry scores. CONCLUSIONS Remote genetic education and testing can be a successful and complementary option for delivering genetics care. (Clinicaltrials.gov, number NCT03762590).
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Affiliation(s)
- Nicolette J Rodriguez
- Dana-Farber Cancer Institute, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts; Brigham and Women's Hospital, Boston, Massachusetts
| | - C Sloane Furniss
- Dana-Farber Cancer Institute, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts
| | - Matthew B Yurgelun
- Dana-Farber Cancer Institute, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts; Brigham and Women's Hospital, Boston, Massachusetts
| | - Chinedu Ukaegbu
- Dana-Farber Cancer Institute, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts
| | - Pamela E Constantinou
- Sheikh Ahmed Center for Pancreatic Cancer Research, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | | | | | | | | | | | | | - Scott H Nelson
- Pancreatic Cancer Action Network Volunteer, Patient Advocate, and Pancreatic Cancer Survivor
| | | | | | - Tara B Coffin
- WIRB-Copernicus Group Institutional Review Board, Puyallup, Washington
| | - Hajime Uno
- Dana-Farber Cancer Institute, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts
| | - Miki Horiguchi
- Dana-Farber Cancer Institute, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts
| | | | - Florencia McAllister
- Sheikh Ahmed Center for Pancreatic Cancer Research, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Andrew M Lowy
- Moores Cancer Center, UC San Diego, San Diego, California
| | - Alison P Klein
- Johns Hopkins University, Sol Goldman Pancreatic Cancer Research Center, Baltimore, Maryland
| | - Lisa Madlensky
- Moores Cancer Center, UC San Diego, San Diego, California
| | | | - Judy E Garber
- Dana-Farber Cancer Institute, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts; Brigham and Women's Hospital, Boston, Massachusetts
| | | | - Michael G Goggins
- Johns Hopkins University, Sol Goldman Pancreatic Cancer Research Center, Baltimore, Maryland
| | - Anirban Maitra
- Sheikh Ahmed Center for Pancreatic Cancer Research, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Sapna Syngal
- Dana-Farber Cancer Institute, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts; Brigham and Women's Hospital, Boston, Massachusetts.
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2
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Sablatura LK, Bircsak KM, Shepherd P, Bathina M, Queiroz K, Farach-Carson MC, Kittles RA, Constantinou PE, Saleh A, Navone NM, Harrington DA. A 3D Perfusable Platform for In Vitro Culture of Patient Derived Xenografts. Adv Healthc Mater 2022:e2201434. [PMID: 36461624 DOI: 10.1002/adhm.202201434] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 06/14/2022] [Revised: 10/07/2022] [Indexed: 12/04/2022]
Abstract
Many advanced cancer models, such as patient-derived xenografts (PDXs), offer significant benefits in their preservation of the native tumor's heterogeneity and susceptibility to treatments, but face significant barriers to use in their reliance on a rodent host for propagation and screening. PDXs remain difficult to implement in vitro, particularly in configurations that enable both detailed cellular analysis and high-throughput screening (HTS). Complex multilineage co-cultures with stromal fibroblasts, endothelium, and other cellular and structural components of the tumor microenvironment (TME) further complicate ex vivo implementation. Herein, the culture of multiple prostate cancer (PCa)-derived PDX models as 3D clusters within engineered biomimetic hydrogel matrices, in a HTS-compatible multiwell microfluidic format, alongside bone marrow-derived stromal cells and a perfused endothelial channel. Polymeric hydrogel matrices are customized for each cell type, enabling cell survival in vitro and facile imaging across all conditions. PCa PDXs demonstrate unique morphologies and reliance on TME partners, retention of known phenotype, and expected sensitivity or resistance to standard PCa therapeutics. This novel integration of technologies provides a fully human model, and expands the information to be gathered from each specimen, while avoiding the time and labor involved with animal-based testing.
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Affiliation(s)
| | | | - Peter Shepherd
- Department of Genitourinary Medical Oncology Research, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Madhavi Bathina
- Division of Health Equities, Department of Population Sciences, City of Hope Comprehensive Cancer Center, Duarte, CA, 91010, USA
| | | | - Mary C Farach-Carson
- Department of BioSciences, Rice University, Houston, TX, 77005, USA.,Department of Bioengineering, Rice University, Houston, TX, 77005, USA.,Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center, Houston, TX, 77054, USA
| | - Rick A Kittles
- Division of Health Equities, Department of Population Sciences, City of Hope Comprehensive Cancer Center, Duarte, CA, 91010, USA
| | - Pamela E Constantinou
- Department of BioSciences, Rice University, Houston, TX, 77005, USA.,Sheikh Ahmed Center for Pancreatic Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | | | - Nora M Navone
- Department of Genitourinary Medical Oncology Research, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Daniel A Harrington
- Department of BioSciences, Rice University, Houston, TX, 77005, USA.,Department of Bioengineering, Rice University, Houston, TX, 77005, USA.,Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center, Houston, TX, 77054, USA
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3
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Rodriguez NJ, Furniss CS, Yurgelun MB, Ukaegbu C, Constantinou PE, Fortes I, Caruso A, Schwartz AN, Stopfer JE, Underhill-Blazey M, Kenner B, Nelson SH, Okumura S, Zhou AY, Coffin TB, Uno H, Horiguchi M, Ocean AJ, McAllister F, Lowy AM, Lippman SM, Klein AP, Madlensky L, Petersen GM, Garber JE, Goggins MG, Maitra A, Syngal S. Abstract A029: A randomized study of two Strategies of remote Genetic Education, Risk Assessment, and Testing (GENERATE) for family members of patients with pancreatic cancer. Cancer Res 2022. [DOI: 10.1158/1538-7445.panca22-a029] [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] [Indexed: 11/17/2022]
Abstract
Abstract
Background: Uptake of genetic testing for cancer susceptibility in family members of cancer patients is suboptimal. The GENetic Education, Risk Assessment, and TEsting (GENERATE) study evaluated two strategies of remote genetic education and testing in relatives of pancreatic ductal adenocarcinoma (PDAC) patients. Methods: Eligible participants had: a first-degree relative with PDAC or had a known pathogenic germline variant (PGV) in one of thirteen PDAC predisposition genes (APC, ATM, BRCA1, BRCA2, CDKN2A, EPCAM, MLH1, MSH2, MSH6, PALB2, PMS2, STK11, or TP53) and a first- or second-degree relative with PDAC. Participants were cluster-randomized by family into one of two arms. Arm 1 included an interactive telemedicine session with a genetic counselor, followed by genetic testing at a commercial laboratory. Arm 2 involved remote online genetic education and testing at the commercial laboratory without the interactive session. The primary outcome was uptake of genetic testing across study arms, which was compared by permutation tests and mixed-effects logistic regression models. Results: Between 5/8/2019 and 6/1/2021, 424 families were randomized, including 601 participants (n=296 Arm 1; n=305 Arm 2). The uptake of genetic testing was 87% (257/296) in Arm 1 and 93% (284/305) in Arm 2 (p=0.014). Participants in Arm 1 were significantly less likely to obtain genetic testing compared to Arm 2 (Adjusted ratio [Arm1/Arm2] 0.90, 95% confidence interval 0.78-0.98). BRCA2, ATM, CDKN2A and PALB2 were the most common PDAC susceptibility genes in which PGVs were identified. Conclusions: Remote methods of genetic education and testing are successful alternatives to traditional germline susceptibility testing.
Citation Format: Nicolette J. Rodriguez, C. Sloane Furniss, Matthew B. Yurgelun, Chinedu Ukaegbu, Pamela E. Constantinou, Ileana Fortes, Alyson Caruso, Alison N. Schwartz, Jill E. Stopfer, Meghan Underhill-Blazey, Barbara Kenner, Scott H. Nelson, Sydney Okumura, Alicia Y. Zhou, Tara B. Coffin, Hajime Uno, Miki Horiguchi, Allyson J. Ocean, Florencia McAllister, Andrew M. Lowy, Scott M. Lippman, Alison P. Klein, Lisa Madlensky, Gloria M. Petersen, Judy E. Garber, Michael G. Goggins, Anirban Maitra, Sapna Syngal. A randomized study of two Strategies of remote Genetic Education, Risk Assessment, and Testing (GENERATE) for family members of patients with pancreatic cancer [abstract]. In: Proceedings of the AACR Special Conference on Pancreatic Cancer; 2022 Sep 13-16; Boston, MA. Philadelphia (PA): AACR; Cancer Res 2022;82(22 Suppl):Abstract nr A029.
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Affiliation(s)
- Nicolette J. Rodriguez
- 1Brigham and Women's Hospital, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA,
| | | | - Matthew B. Yurgelun
- 3Dana-Farber Cancer Institute, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA,
| | | | - Pamela E. Constantinou
- 5Sheikh Ahmed Center for Pancreatic Cancer Research, University of Texas MD Anderson Cancer Center, Houston, TX,
| | | | | | | | | | | | | | | | | | | | | | - Hajime Uno
- 2Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA,
| | - Miki Horiguchi
- 2Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA,
| | | | - Florencia McAllister
- 5Sheikh Ahmed Center for Pancreatic Cancer Research, University of Texas MD Anderson Cancer Center, Houston, TX,
| | | | | | - Alison P. Klein
- 13Johns Hopkins University Sol Goldman Pancreatic Cancer Research Center, Baltimore, MD,
| | | | | | - Judy E. Garber
- 3Dana-Farber Cancer Institute, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA,
| | - Michael G. Goggins
- 13Johns Hopkins University Sol Goldman Pancreatic Cancer Research Center, Baltimore, MD,
| | - Anirban Maitra
- 5Sheikh Ahmed Center for Pancreatic Cancer Research, University of Texas MD Anderson Cancer Center, Houston, TX,
| | - Sapna Syngal
- 3Dana-Farber Cancer Institute, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA,
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4
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Rodriguez NJ, Furniss CS, Yurgelun MB, Ukaegbu C, Constantinou PE, Schwartz AN, Stopfer J, Underhill-Blazey M, Kenner B, Nelson S, Okumura S, Law S, Zhou AY, Coffin TB, Uno H, Ocean A, McAllister F, Lowy AM, Lippman SM, Klein AP, Madlensky L, Petersen GM, Garber JE, Goggins MG, Maitra A, Syngal S. Abstract PO-013: Comparison of novel healthcare delivery models on the uptake of genetic education and testing in families with a history of pancreatic cancer: The GENetic Education, Risk Assessment and TEsting (GENERATE) study. Cancer Res 2021. [DOI: 10.1158/1538-7445.panca21-po-013] [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] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Roughly 7–10% of patients with pancreatic ductal adenocarcinoma (PDAC) have a deleterious germline variant. Although identification of germline variants in family members has implications for cancer surveillance and can lead to early cancer detection and interception for PDAC, as well as other cancers, cascade genetic testing rates are low. The GENetic Education, Risk Assessment and TEsting (GENERATE) study evaluates novel methods of providing genetic education and testing for individuals at risk for hereditary PDAC. Methods: Eligible participants had: (1) a first- or second-degree relative with a diagnosis of PDAC and a known familial germline variant in APC, ATM, BRCA1, BRCA2, CDKN2A, EPCAM, MLH1, MSH2, MSH6, PALB2, PMS2, STK11, or TP53 (Known Familial Mutation (KFM)), (2) or were first-degree relatives of PDAC patients (no KFM). Participants were recruited through six academic centers, patient advocacy organizations and online outreach. Enrollment occurred through the study website (www.GENERATEstudy.org). All study participation, including genetic testing via a at home saliva sample kit, was done remotely. Participants were cluster randomized at the family level into one of two arms. Arm 1 (Doxy.me plus Color Genomics) included remote genetic education and testing through a video-based telemedicine platform (Doxy.me) and physician-mediated testing through Color Genomics. Arm 2 included remote genetic education and testing through Color Genomics only. Results: Between 5/8/2019–6/01/2021, 423 families were randomized, comprising 595 participants. Recruitment occurred through patient invitation via healthcare providers (n=128, 21.5%), family members (n=271, 45.5%), friends, advocacy groups, and online outreach (n=223, 37.5%). Participants were referred from the six GENERATE academic centers (n=270, 45.4%) and other institutions (n=325, 54.6%). Study participants were 52.5 years on average, primarily identified as White (n=577, 97%) and from the Northeast (n=184, 30.9%), Midwest (n=154, 25.9%), South (n=158, 26.6%) and West (n=99, 16.6%). Participants were randomized into each arm (n=296 Doxy.me plus Color Genomics; n=299 Color Genomics only). To date, 527 (88.6%) participants have ordered genetic testing. The uptake of genetic testing was 253/296 (85.5%) in the Doxy.me plus Color Genomics arm and 274/299 (91.6%) in the Color Genomics only arm (p=0.049, generalized mixed-effects model). A total of 82 PDAC associated pathogenic variants were identified. The most frequently detected variants were BRCA2 (n=32), ATM (n=25) and PALB2 (n=6). Additionally, 13 non-PDAC associated pathogenic variants and 20 low penetrance variants were detected. Conclusions: Remote methods of genetic education and testing are successful alternatives to traditional cascade testing, with genetic testing rates nearly 90%. Participant follow up will assess if satisfaction with decision making, cancer-risk distress, knowledge gained, family communication, and uptake of surveillance were impacted by the mode of delivery of pre-test genetic education.
Citation Format: Nicolette J. Rodriguez, Constance S. Furniss, Matthew B. Yurgelun, Chinedu Ukaegbu, Pamela E. Constantinou, Alison N. Schwartz, Jill Stopfer, Meghan Underhill-Blazey, Barbara Kenner, Scott Nelson, Sydney Okumura, Sherman Law, Alicia Y. Zhou, Tara B. Coffin, Hajime Uno, Allyson Ocean, Florencia McAllister, Andrew M. Lowy, Scott M. Lippman, Alison P. Klein, Lisa Madlensky, Gloria M. Petersen, Judy E. Garber, Michael G. Goggins, Anirban Maitra, Sapna Syngal. Comparison of novel healthcare delivery models on the uptake of genetic education and testing in families with a history of pancreatic cancer: The GENetic Education, Risk Assessment and TEsting (GENERATE) study [abstract]. In: Proceedings of the AACR Virtual Special Conference on Pancreatic Cancer; 2021 Sep 29-30. Philadelphia (PA): AACR; Cancer Res 2021;81(22 Suppl):Abstract nr PO-013.
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Affiliation(s)
- Nicolette J. Rodriguez
- 1Dana-Farber Cancer Institute/Brigham and Women's Hospital/Harvard Medical School, Boston, MA,
| | | | - Matthew B. Yurgelun
- 3Dana-Farber Cancer Institute/Brigham and Women’s Hospital/Harvard Medical School, Boston, MA,
| | | | - Pamela E. Constantinou
- 5Sheikh Ahmed Center for Pancreatic Cancer Research/University of Texas MD Anderson Cancer Center, Houston, TX,
| | | | | | | | | | - Scott Nelson
- 8Pancreatic Cancer Action Network Volunteer, Manhattan Beach, CA,
| | | | | | | | | | - Hajime Uno
- 2Dana-Farber Cancer Institute/Harvard Medical School, Boston, MA,
| | | | - Florencia McAllister
- 5Sheikh Ahmed Center for Pancreatic Cancer Research/University of Texas MD Anderson Cancer Center, Houston, TX,
| | | | | | - Alison P. Klein
- 13Johns Hopkins University/Sol Goldman Pancreatic Cancer Research Center, Baltimore, MD,
| | | | | | - Judy E. Garber
- 1Dana-Farber Cancer Institute/Brigham and Women's Hospital/Harvard Medical School, Boston, MA,
| | - Michael G. Goggins
- 13Johns Hopkins University/Sol Goldman Pancreatic Cancer Research Center, Baltimore, MD,
| | - Anirban Maitra
- 5Sheikh Ahmed Center for Pancreatic Cancer Research/University of Texas MD Anderson Cancer Center, Houston, TX,
| | - Sapna Syngal
- 3Dana-Farber Cancer Institute/Brigham and Women’s Hospital/Harvard Medical School, Boston, MA,
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5
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Furniss CS, Yurgelun MB, Ukaegbu C, Constantinou PE, Lafferty CC, Talcove-Berko ER, Schwartz AN, Stopfer JE, Underhill-Blazey M, Kenner B, Nelson SH, Okumura S, Law S, Zhou AY, Coffin TB, Rodriguez NJ, Uno H, Ocean AJ, McAllister F, Lowy AM, Lippman SM, Klein AP, Madlensky L, Petersen GM, Garber JE, Goggins MG, Maitra A, Syngal S. Novel Models of Genetic Education and Testing for Pancreatic Cancer Interception: Preliminary Results from the GENERATE Study. Cancer Prev Res (Phila) 2021; 14:1021-1032. [PMID: 34625409 PMCID: PMC8563400 DOI: 10.1158/1940-6207.capr-20-0642] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 04/20/2021] [Accepted: 07/09/2021] [Indexed: 12/13/2022]
Abstract
Up to 10% of patients with pancreatic ductal adenocarcinoma (PDAC) carry underlying germline pathogenic variants in cancer susceptibility genes. The GENetic Education Risk Assessment and TEsting (GENERATE) study aimed to evaluate novel methods of genetic education and testing in relatives of patients with PDAC. Eligible individuals had a family history of PDAC and a relative with a germline pathogenic variant in APC, ATM, BRCA1, BRCA2, CDKN2A, EPCAM, MLH1, MSH2, MSH6, PALB2, PMS2, STK11, or TP53 genes. Participants were recruited at six academic cancer centers and through social media campaigns and patient advocacy efforts. Enrollment occurred via the study website (https://GENERATEstudy.org) and all participation, including collecting a saliva sample for genetic testing, could be done from home. Participants were randomized to one of two remote methods that delivered genetic education about the risks of inherited PDAC and strategies for surveillance. The primary outcome of the study was uptake of genetic testing. From 5/8/2019 to 5/6/2020, 49 participants were randomized to each of the intervention arms. Overall, 90 of 98 (92%) of randomized participants completed genetic testing. The most frequently detected pathogenic variants included those in BRCA2 (N = 15, 17%), ATM (N = 11, 12%), and CDKN2A (N = 4, 4%). Participation in the study remained steady throughout the onset of the Coronavirus disease (COVID-19) pandemic. Preliminary data from the GENERATE study indicate success of remote alternatives to traditional cascade testing, with genetic testing rates over 90% and a high rate of identification of germline pathogenic variant carriers who would be ideal candidates for PDAC interception approaches. PREVENTION RELEVANCE: Preliminary data from the GENERATE study indicate success of remote alternatives for pancreatic cancer genetic testing and education, with genetic testing uptake rates over 90% and a high rate of identification of germline pathogenic variant carriers who would be ideal candidates for pancreatic cancer interception.
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Affiliation(s)
- C Sloane Furniss
- Dana-Farber Cancer Institute, Boston, Massachusetts
- Harvard Medical School, Boston, Massachusetts
| | - Matthew B Yurgelun
- Dana-Farber Cancer Institute, Boston, Massachusetts
- Harvard Medical School, Boston, Massachusetts
- Brigham and Women's Hospital, Boston, Massachusetts
| | | | - Pamela E Constantinou
- Sheikh Ahmed Center for Pancreatic Cancer Research, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | | | | | | | | | | | | | - Scott H Nelson
- Pancreatic Cancer Action Network Volunteer, Patient Advocate, and Pancreatic Cancer Survivor, St. Anthony, Minnesota
| | | | | | | | | | - Nicolette J Rodriguez
- Dana-Farber Cancer Institute, Boston, Massachusetts
- Harvard Medical School, Boston, Massachusetts
- Brigham and Women's Hospital, Boston, Massachusetts
| | - Hajime Uno
- Dana-Farber Cancer Institute, Boston, Massachusetts
- Harvard Medical School, Boston, Massachusetts
| | | | - Florencia McAllister
- Sheikh Ahmed Center for Pancreatic Cancer Research, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Andrew M Lowy
- Moores Cancer Center, UC San Diego, San Diego, California
| | | | - Alison P Klein
- Johns Hopkins University, Sol Goldman Pancreatic Cancer Research Center, Baltimore, Maryland
| | - Lisa Madlensky
- Moores Cancer Center, UC San Diego, San Diego, California
| | | | - Judy E Garber
- Dana-Farber Cancer Institute, Boston, Massachusetts
- Harvard Medical School, Boston, Massachusetts
- Brigham and Women's Hospital, Boston, Massachusetts
| | - Michael G Goggins
- Johns Hopkins University, Sol Goldman Pancreatic Cancer Research Center, Baltimore, Maryland
| | - Anirban Maitra
- Sheikh Ahmed Center for Pancreatic Cancer Research, University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Sapna Syngal
- Dana-Farber Cancer Institute, Boston, Massachusetts.
- Harvard Medical School, Boston, Massachusetts
- Brigham and Women's Hospital, Boston, Massachusetts
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Pudakalakatti S, Enriquez JS, McCowan C, Ramezani S, Davis JS, Zacharias NM, Bourgeois D, Constantinou PE, Harrington DA, Carson D, Farach-Carson MC, Bhattacharya PK. Hyperpolarized MRI with silicon micro and nanoparticles: Principles and applications. Wiley Interdiscip Rev Nanomed Nanobiotechnol 2021; 13:e1722. [PMID: 33982426 DOI: 10.1002/wnan.1722] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 04/18/2021] [Accepted: 04/19/2021] [Indexed: 11/08/2022]
Abstract
Silicon-based micro and nanoparticles are ideally suited for use as biomedical imaging agents because of their biocompatibility, biodegradability, and simple surface chemistry that facilitates drug loading and targeting. A method to hyperpolarize silicon particles using dynamic nuclear polarization (DNP), which increases magnetic resonance (MR) imaging signals by several orders-of-magnitude through enhanced nuclear spin alignment, was developed to allow silicon particles to function as contrast agents for in vivo magnetic resonance imaging. In this review, we describe the application of the DNP technique to silicon particles and nanoparticles for background-free real-time molecular MR imaging. This review provides a summary of the state-of-the-science in silicon particle hyperpolarization with a detailed protocol for hyperpolarizing silicon particles. This information will foster awareness and spur interest in this emerging area of nanoimaging and provide a path to new developments and discoveries to further advance the field. This article is categorized under: Diagnostic Tools > In Vivo Nanodiagnostics and Imaging Therapeutic Approaches and Drug Discovery > Nanomedicine for Oncologic Disease Therapeutic Approaches and Drug Discovery > Emerging Technologies.
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Affiliation(s)
- Shivanand Pudakalakatti
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - José S Enriquez
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.,MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, Texas, USA
| | - Caitlin McCowan
- Department of Electrical and Computer Engineering, Rice University, Houston, Texas, USA.,Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center, School of Dentistry, Houston, Texas, USA
| | - Saleh Ramezani
- MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, Texas, USA.,Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center, School of Dentistry, Houston, Texas, USA
| | - Jennifer S Davis
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Niki M Zacharias
- MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, Texas, USA.,Department of Urology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Dontrey Bourgeois
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.,Department of Statistics, Rice University, Houston, Texas, USA
| | - Pamela E Constantinou
- Department of BioSciences, Rice University, Houston, Texas, USA.,Sheikh Ahmed Center for Pancreatic Cancer Research, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Daniel A Harrington
- MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, Texas, USA.,Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center, School of Dentistry, Houston, Texas, USA.,Department of BioSciences, Rice University, Houston, Texas, USA
| | - Daniel Carson
- Department of BioSciences, Rice University, Houston, Texas, USA
| | - Mary C Farach-Carson
- MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, Texas, USA.,Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center, School of Dentistry, Houston, Texas, USA.,Department of BioSciences, Rice University, Houston, Texas, USA
| | - Pratip K Bhattacharya
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.,MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, Texas, USA
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7
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Sablatura LK, Bircsak KM, Shepherd P, Queiroz K, Farach-Carson MC, Constantinou PE, Saleh A, Navone N, Harrington DA. Enhanced Viability for Ex vivo 3D Hydrogel Cultures of Patient-Derived Xenografts in a Perfused Microfluidic Platform. J Vis Exp 2020. [PMID: 33346184 DOI: 10.3791/60872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Patient-derived xenografts (PDX), generated when resected patient tumor tissue is engrafted directly into immunocompromised mice, remain biologically stable, thereby preserving molecular, genetic, and histological features, as well as heterogeneity of the original tumor. However, using these models to perform a multitude of experiments, including drug screening, is prohibitive both in terms of cost and time. Three-dimensional (3D) culture systems are widely viewed as platforms in which cancer cells retain their biological integrity through biochemical interactions, morphology, and architecture. Our team has extensive experience culturing PDX cells in vitro using 3D matrices composed of hyaluronic acid (HA). In order to separate mouse fibroblast stromal cells associated with PDXs, we use rotation culture, where stromal cells adhere to the surface of tissue culture-treated plates while dissociated PDX tumor cells float and self-associate into multicellular clusters. Also floating in the supernatant are single, often dead cells, which present a challenge in collecting viable PDX clusters for downstream encapsulation into hydrogels for 3D cell culture. In order to separate these single cells from live cell clusters, we have employed density step gradient centrifugation. The protocol described here allows for the depletion of non-viable single cells from the healthy population of cell clusters that will be used for further in vitro experimentation. In our studies, we incorporate the 3D cultures in microfluidic plates which allow for media perfusion during culture. After assessing the resultant cultures using a fluorescent image-based viability assay of purified versus non-purified cells, our results show that this additional separation step substantially reduced the number of non-viable cells from our cultures.
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Affiliation(s)
| | | | - Peter Shepherd
- Department of Genitourinary Medical Oncology Research, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center
| | | | - Mary C Farach-Carson
- Department of BioSciences, Rice University; Department of Bioengineering, Rice University; Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center
| | - Pamela E Constantinou
- Department of BioSciences, Rice University; Sheikh Ahmed Center for Pancreatic Cancer Research, The University of Texas MD Anderson Cancer Center
| | | | - Nora Navone
- Department of Genitourinary Medical Oncology Research, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center
| | - Daniel A Harrington
- Department of BioSciences, Rice University; Department of Bioengineering, Rice University; Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center;
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Sablatura LK, Bircsak KM, Shepherd P, Kittles R, Constantinou PE, Saleh AD, Navone NM, Harrington DA. Abstract 3337: A racially/ethnically diverse 3D PDX model of prostate cancer. Cancer Res 2019. [DOI: 10.1158/1538-7445.am2019-3337] [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] [Indexed: 11/16/2022]
Abstract
Abstract
Prostate cancer (PCa) incidence and mortality rates in African American men are double that of any other race/ethnicity in the United States. Thorough understanding of the biological factors that contribute to this long-standing cancer health disparity (CHD) is required to improve the major public health concern and close this gap. However, few models exist that can compare racially-diverse specimens directly and provide a platform for dissecting the impact of ancestry-dependent factors on disease pathway selection and drug susceptibility. Both the conventional 2D culture of clonal human cell lines and the purely rodent-based in vivo models fail to reflect the heterogeneity of human tumors, often leading to inaccurate prediction of in vivo tumor response in patients, and confounding researchers’ ability to detect potentially subtle biological factors that may contribute to prostate CHD. PCa patient-derived xenografts (PDXs) offer substantially greater fidelity to original patient tumors but are non-adherent and ultimately non-viable in extended in vitro 2D culture. Therefore, a population-based PCa platform which accurately mimics the three-dimensional (3D) tumor microenvironment (TME) is urgently needed.
We have employed MIMETAS’ OrganoPlate®, a high throughput microfluidic culture platform containing 40-96 individual tissue chips, for ex vivo 3D culture of multiple racially/ethnically diverse PCa PDXs (African American, Caucasian, Hispanic) developed at MD Anderson Cancer Center (the MDA PCa PDXs series). MDA PCa PDX tumors were reconstituted from single-cell digestates into multicellular clusters, suspended within HyStem® hyaluronic acid hydrogel precursor solutions, and loaded into the OrganoPlate®. PDXs were maintained in 3D either as monocultures, as cocultures with bone marrow-derived stromal fibroblasts, or as tricultures with endothelial cell blood vessel mimics under continuous perfusion. High-content fluorescence imaging identified retention of stable, viable cultures for at least 7 days. Positive immunofluorescent staining for human nuclear antigen (HNA) confirmed that nearly 100% of encapsulated PCa cells were of human origin. For each PCa model developed, appropriate expression of phenotypic prostate-specific antigen (PSA) and androgen receptor (AR) was maintained over the life of the culture. PCa cultures were treated with various chemotherapeutic drugs and viability was monitored to generate dose response curves for comparison to clinical data. This engineered “tumor-on-a-chip” will better predict patient responses and, by incorporating PCa cells from patients with diverse ancestries, support CHD research.
Citation Format: Lindsey K. Sablatura, Kristin M. Bircsak, Peter Shepherd, Rick Kittles, Pamela E. Constantinou, Anthony D. Saleh, Nora M. Navone, Daniel A. Harrington. A racially/ethnically diverse 3D PDX model of prostate cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 3337.
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Affiliation(s)
| | | | - Peter Shepherd
- 3The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | | | - Nora M. Navone
- 3The University of Texas MD Anderson Cancer Center, Houston, TX
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Sablatura L, Bircsak KM, Farach-Carson MC, Navone N, Shepherd P, Zarembinski T, Constantinou PE, Saleh A, Harrington DA. Abstract 5023: A 3D perfusable platform for high-throughput screening diverse racial/ethnic prostate cancer specimens. Cancer Res 2018. [DOI: 10.1158/1538-7445.am2018-5023] [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] [Indexed: 11/16/2022]
Abstract
Abstract
Prostate cancer (PCa) incidence and mortality in African American men is more than 1.5 times greater than men of other races/ethnicities (i.e., Caucasian, Hispanic, American Indian/Alaska Native, Asian/Pacific Islander) in the United States. While elucidating the underlying mechanisms for this cancer health disparity is critical to patient treatment and improved patient outcome, currently, there are no in vitro models available to adequately recapitulate the PCa tumor microenvironment (TME) and aid in this effort. Advanced in vitro culture conditions, such as extended ex vivo culture of patient-derived xenografts (PDXs), 3-dimensional (3D) culture of cells within a defined extracellular matrix (ECM), miniaturization to formats compatible with high-throughput screening (HTS), controlled media perfusion, and co-culture of cancer, stroma, and endothelium, are key elements for improving PCa study, but few systems include two or more of these features. We have optimized culture conditions of a 3D in vitro model system, the OncoPlate, which mimics the PCa TME. In the OncoPlate, cells are seeded in engineered HyStem® hyaluronic acid (HA)-enriched hydrogels, optionally modified with migration-permissive peptides to mimic the tumor ECM. PDX-derived PCa cells are seeded in 3D in MIMETAS' microfluidic OrganoPlate® platform and co-cultured with stromal fibroblasts and endothelial blood vessel mimics under continuous perfusion. We predict that this engineered “tumor-on-a-chip” will better predict patient responses and, by incorporating PCa cells from patients with diverse racial backgrounds, support cancer health disparity research. Here we report culture of several PDX-derived PCa models of diverse racial origin cultured in our OncoPlate format. Live/dead staining followed by automated high content fluorescence imaging was utilized at various time points to characterize viability and growth rate of each model. Immunofluorescent staining for PSA (PCa cells), FSP (cancer associated fibroblasts), and VE-cadherin (endothelial cells) was used to display phenotype and health of each cell type in the culture over a week and formation of 3D structures characteristic of prostate cancer histology. Studies are ongoing to screen each model with a panel of chemotherapeutic drugs for which in vivo mouse PDX response data is available with the goal to improve predictive accuracy by using our perfusable OncoPlate PCa models.
Citation Format: Lindsey Sablatura, Kristin M. Bircsak, Mary C. Farach-Carson, Nora Navone, Peter Shepherd, Thomas Zarembinski, Pamela E. Constantinou, Anthony Saleh, Daniel A. Harrington. A 3D perfusable platform for high-throughput screening diverse racial/ethnic prostate cancer specimens [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 5023.
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Affiliation(s)
| | | | - Mary C. Farach-Carson
- 3The University of Texas Health Science Center Houston School of Dentistry, Houston, TX
| | - Nora Navone
- 4The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Peter Shepherd
- 4The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | | | - Daniel A. Harrington
- 3The University of Texas Health Science Center Houston School of Dentistry, Houston, TX
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Morgado M, Sutton MN, Simmons M, Warren CR, Lu Z, Constantinou PE, Liu J, Francis LLW, Conlan RS, Bast RC, Carson DD. Tumor necrosis factor-α and interferon-γ stimulate MUC16 (CA125) expression in breast, endometrial and ovarian cancers through NFκB. Oncotarget 2018; 7:14871-84. [PMID: 26918940 PMCID: PMC4924758 DOI: 10.18632/oncotarget.7652] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 01/31/2016] [Indexed: 12/11/2022] Open
Abstract
Transmembrane mucins (TMs) are restricted to the apical surface of normal epithelia. In cancer, TMs not only are over-expressed, but also lose polarized distribution. MUC16/CA125 is a high molecular weight TM carrying the CA125 epitope, a well-known molecular marker for human cancers. MUC16 mRNA and protein expression was mildly stimulated by low concentrations of TNFα (2.5 ng/ml) or IFNγ (20 IU/ml) when used alone; however, combined treatment with both cytokines resulted in a moderate (3-fold or less) to large (> 10-fold) stimulation of MUC16 mRNA and protein expression in a variety of cancer cell types indicating that this may be a general response. Human cancer tissue microarray analysis indicated that MUC16 expression directly correlates with TNFα and IFNγ staining intensities in certain cancers. We show that NFκB is an important mediator of cytokine stimulation of MUC16 since siRNA-mediated knockdown of NFκB/p65 greatly reduced cytokine responsiveness. Finally, we demonstrate that the 250 bp proximal promoter region of MUC16 contains an NFκB binding site that accounts for a large portion of the TNFα response. Developing methods to manipulate MUC16 expression could provide new approaches to treating cancers whose growth or metastasis is characterized by elevated levels of TMs, including MUC16.
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Affiliation(s)
- Micaela Morgado
- Department of BioSciences, Wiess School of Natural Sciences, Rice University, Houston, TX 77251, USA
| | - Margie N Sutton
- Department of Experimental Therapeutics, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.,The University of Texas Graduate School of Biomedical Sciences, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Mary Simmons
- Department of Experimental Therapeutics, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Curtis R Warren
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Zhen Lu
- Department of Experimental Therapeutics, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Pamela E Constantinou
- Department of BioSciences, Wiess School of Natural Sciences, Rice University, Houston, TX 77251, USA
| | - Jinsong Liu
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Lewis L W Francis
- Swansea University Medical School, Singleton Park, Swansea, SA2 8PP, Wales, UK
| | - R Steven Conlan
- Swansea University Medical School, Singleton Park, Swansea, SA2 8PP, Wales, UK
| | - Robert C Bast
- Department of Experimental Therapeutics, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Daniel D Carson
- Department of BioSciences, Wiess School of Natural Sciences, Rice University, Houston, TX 77251, USA.,Department of Genetics, The University of Texas MD Anderson Cancer Center Houston, TX 77030, USA
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11
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Constantinou PE, Engel BJ, Sablatura LK, Doty NJ, Carson DD, Farach-Carson MC, Harrington DA, Zarembinski TI. Abstract 604: A multi-layered, hydrogel system for automated 3D high throughput drug screening of cancer-stromal cell co-cultures. Cancer Res 2016. [DOI: 10.1158/1538-7445.am2016-604] [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] [Indexed: 11/16/2022]
Abstract
Abstract
Pre-clinical drug screens, involving culturing well-annotated cancer cell lines on two-dimensional (2D) tissue culture plastic, poorly recapitulate in vivo tumor characteristics and yield candidate drugs which fail clinical trials. We created a multi-layer, hyaluronic acid (HA)-based hydrogel system that incorporates three layers: an acellular cushion layer; an encapsulated cancer cell layer for growth in three dimensions (3D); and a collagen-containing layer that supports the growth of stromal cells on top of the hydrogel (2.5D). Utilizing high-throughput robotic delivery coupled with automated advanced imaging, this formulation provides a highly reproducible system for spheroid culture of prostate (C4-2B) or endometrial (Ishikawa) cancer cell lines in mono- or co-culture with matched stromal cells (HS27a or ESS-1, respectively). Both culture systems provided high cancer cell viability over one week of culture. Cells were treated with drugs from a panel of chemotherapeutic compounds. Cells cultured in our 3D multi-layer HA-based system responded to cytotoxic drugs distinctly from cells grown in 2D and 3D-aliginate, and better predicted the efficacy of chemotherapeutics in clinical trials. We have also successfully incorporated cells derived from patient derived xenograft (PDX) models in our 3D culture system. Wider adoption of 3D automated screening has the potential to speed drug discovery and increase success of drugs in clinical trials.
Citation Format: Pamela E. Constantinou, Brian J. Engel, Lindsey K. Sablatura, Nathaniel J. Doty, Daniel D. Carson, Mary C. Farach-Carson, Daniel A. Harrington, Thomas I. Zarembinski. A multi-layered, hydrogel system for automated 3D high throughput drug screening of cancer-stromal cell co-cultures. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 604.
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12
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Engel BJ, Constantinou PE, Sablatura LK, Doty NJ, Carson DD, Farach-Carson MC, Harrington DA, Zarembinski TI. Multilayered, Hyaluronic Acid-Based Hydrogel Formulations Suitable for Automated 3D High Throughput Drug Screening of Cancer-Stromal Cell Cocultures. Adv Healthc Mater 2015; 4:1664-74. [PMID: 26059746 PMCID: PMC4545642 DOI: 10.1002/adhm.201500258] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [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: 04/09/2015] [Revised: 05/14/2015] [Indexed: 12/27/2022]
Abstract
Validation of a high-throughput compatible 3D hyaluronic acid hydrogel coculture of cancer cells with stromal cells. The multilayered hyaluronic acid hydrogels improve drug screening predictability as evaluated with a panel of clinically relevant chemotherapeutics in both prostate and endometrial cancer cell lines compared to 2D culture.
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Affiliation(s)
- Brian J Engel
- Department of BioSciences, Rice University, 6100 Main Street, Houston, Texas 77005, USA
| | - Pamela E Constantinou
- Department of BioSciences, Rice University, 6100 Main Street, Houston, Texas 77005, USA
| | - Lindsey K Sablatura
- Department of BioSciences, Rice University, 6100 Main Street, Houston, Texas 77005, USA
| | - Nathaniel J Doty
- BioTime, Incorporated, 1301 Harbor Bay Parkway, Alameda, California 94502, USA
| | - Daniel D Carson
- Department of BioSciences, Rice University, 6100 Main Street, Houston, Texas 77005, USA
| | - Mary C Farach-Carson
- Department of BioSciences, Rice University, 6100 Main Street, Houston, Texas 77005, USA
| | - Daniel A Harrington
- Department of BioSciences, Rice University, 6100 Main Street, Houston, Texas 77005, USA
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13
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Nguyen N, Birktoft JJ, Sha R, Wang T, Zheng J, Constantinou PE, Ginell SL, Chen Y, Mao C, Seeman NC. The absence of tertiary interactions in a self-assembled DNA crystal structure. J Mol Recognit 2012. [DOI: 10.1002/jmr.2214] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Danysh BP, Constantinou PE, Lukianova-Hleb EY, Lapotko DO, Carson DD. The MUC1 Ectodomain: A Novel and Efficient Target for Gold Nanoparticle Clustering and Vapor Nanobubble Generation. Theranostics 2012; 2:777-87. [PMID: 22916077 PMCID: PMC3425120 DOI: 10.7150/thno.4494] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Accepted: 05/21/2012] [Indexed: 12/20/2022] Open
Abstract
MUC1 is a large, heavily glycosylated transmembrane glycoprotein that is proposed to create a protective microenvironment in many adenocarcinomas. Here we compare MUC1 and the well studied cell surface receptor target, EGFR, as gold nanoparticle (AuNP) targets and their subsequent vapor nanobubble generation efficacy in the human epithelial cell line, HES. Although EGFR and MUC1 were both highly expressed in these cells, TEM and confocal images revealed MUC1 as a superior target for nanoparticle intracellular accumulation and clustering. The MUC1-targeted AuNP intracellular clusters also generated significantly larger vapor nanobubbles. Our results demonstrate the promising opportunities MUC1 offers to improve the efficacy of targeted nanoparticle based approaches.
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15
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Nguyen N, Birktoft JJ, Sha R, Wang T, Zheng J, Constantinou PE, Ginell SL, Chen Y, Mao C, Seeman NC. The absence of tertiary interactions in a self-assembled DNA crystal structure. J Mol Recognit 2012; 25:234-7. [PMID: 22434713 DOI: 10.1002/jmr.2183] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
DNA is a highly effective molecule for controlling nanometer-scale structure. The convenience of using DNA lies in the programmability of Watson-Crick base-paired secondary interactions, useful both to design branched molecular motifs and to connect them through sticky-ended cohesion. Recently, the tensegrity triangle motif has been used to self-assemble three-dimensional crystals whose structures have been determined; sticky ends were reported to be the only intermolecular cohesive elements in those crystals. A recent communication in this journal suggested that tertiary interactions between phosphates and cytosine N(4) groups are responsible for intermolecular cohesion in these crystals, in addition to the secondary and covalent interactions programmed into the motif. To resolve this issue, we report experiments challenging this contention. Gel electrophoresis demonstrates that the tensegrity triangle exists in conditions where cytosine-PO(4) tertiary interactions seem ineffective. Furthermore, we have crystallized a tensegrity triangle using a junction lacking the cytosine suggested for involvement in tertiary interactions. The unit cell is isomorphous with that of a tensegrity triangle crystal reported earlier. This structure has been solved by molecular replacement and refined. The data presented here leave no doubt that the tensegrity triangle crystal structures reported earlier depend only on base pairing and covalent interactions for their formation.
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Affiliation(s)
- Nam Nguyen
- Department of Chemistry, New York University, New York, NY 10003, USA
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16
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Abstract
Membrane-tethered mucin glycoproteins are abundantly expressed at the apical surfaces of simple epithelia, where they play important roles in lubricating and protecting tissues from pathogens and enzymatic attack. Notable examples of these mucins are MUC1, MUC4 and MUC16 (also known as cancer antigen 125). In adenocarcinomas, apical mucin restriction is lost and overall expression is often highly increased. High-level mucin expression protects tumors from killing by the host immune system, as well as by chemotherapeutic agents, and affords protection from apoptosis. Mucin expression can increase as the result of gene duplication and/or in response to hormones, cytokines and growth factors prevalent in the tumor milieu. Rises in the normally low levels of mucin fragments in serum have been used as markers of disease, such as tumor burden, for many years. Currently, several approaches are being examined that target mucins for immunization or nanomedicine using mucin-specific antibodies.
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Affiliation(s)
- Pamela E Constantinou
- Department of Biochemistry and Cell Biology, Rice University, Houston, TX 77251-1892, USA
| | - Brian P Danysh
- Department of Biochemistry and Cell Biology, Rice University, Houston, TX 77251-1892, USA
| | - Neeraja Dharmaraj
- Department of Biochemistry and Cell Biology, Rice University, Houston, TX 77251-1892, USA
| | - Daniel D Carson
- Department of Biochemistry and Cell Biology, Rice University, Houston, TX 77251-1892, USA
- Department of Biochemistry and Molecular Biology, MD Anderson Cancer Center, Houston, TX 77030, USA
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17
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Danysh BP, Constantinou PE, Lukianova-Hleb E, Broaddus R, Carson DD. Abstract 368: MUC1-targeted gold nanoparticle-based theranostic approach. Cancer Res 2011. [DOI: 10.1158/1538-7445.am2011-368] [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] [Indexed: 11/16/2022]
Abstract
Abstract
MUC1 is a large transmembrane glycoprotein, extending 200-400 nm from the apical surface of normal polarized epithelial cells in a variety of mucosal tissues. The large ectodomain contains a series of heavily glycosylated tandem repeats and serves as a protective barrier to enzymatic degradation and microbial attack, as well as prevents embryo attachment during the non-receptive phase in the uterus. Many cancers, including endometrial carcinomas, overexpress MUC1 which is believed to promote tumor progression by protecting tumor cells from the immune system, inhibiting apoptosis, and increasing resistance to various chemotherapeutic agents. The availability of MUC1 glycoform-specific antibodies creates an opportunity to exploit the increased or aberrant MUC1 expression in carcinoma cells by creating MUC1-targeted therapies. Gold nanoparticles (AuNPs) conjugated to a human MUC1 ectodomain specific antibody (214D4) are readily endocytosed by MUC1 expressing human endometrial cells (HES) in vitro and, following exposure to a short laser pulse, can be used to form transient vapor bubbles (plasmonic nanobubbles) capable of destroying a cell by mechanically disrupting the cell membrane. In this work, we compare the selective targeting capabilities of MUC1-targeted AuNPs using the human endometrial epithelial cell line HES and endometrial carcinoma cell lines HEC1A and HEC1B. In addition, we have used human MUC1-expressing transgenic mouse lines to examine the feasibility of using AuNP-214D4 targeting in mouse endometrium. These results demonstrate the potential use of MUC1-targetted AuNPs to detect and destroy, as well as deliver cargo, to MUC1 expressing tumors. (Supported by NIH grants HD29963 to DDC, and MD Anderson Gynecologic SPORE for Uterine Cancers 2 P50 CA098258-06 to DDC and RB).
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 368. doi:10.1158/1538-7445.AM2011-368
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Jamison DK, Driver JW, Rogers AR, Constantinou PE, Diehl MR. Two kinesins transport cargo primarily via the action of one motor: implications for intracellular transport. Biophys J 2011; 99:2967-77. [PMID: 21044594 DOI: 10.1016/j.bpj.2010.08.025] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2010] [Revised: 08/10/2010] [Accepted: 08/12/2010] [Indexed: 10/18/2022] Open
Abstract
The number of microtubule motors attached to vesicles, organelles, and other subcellular commodities is widely believed to influence their motile properties. There is also evidence that cells regulate intracellular transport by tuning the number and/or ratio of motor types on cargos. Yet, the number of motors responsible for cargo motion is not easily characterized, and the extent to which motor copy number affects intracellular transport remains controversial. Here, we examined the load-dependent properties of structurally defined motor assemblies composed of two kinesin-1 molecules. We found that a group of kinesins can produce forces and move with velocities beyond the abilities of single kinesin molecules. However, such capabilities are not typically harnessed by the system. Instead, two-kinesin assemblies adopt a range of microtubule-bound configurations while transporting cargos against an applied load. The binding arrangement of motors on their filament dictates how loads are distributed within the two-motor system, which in turn influences motor-microtubule affinities. Most configurations promote microtubule detachment and prevent both kinesins from contributing to force production. These results imply that cargos will tend to be carried by only a fraction of the total number of kinesins that are available for transport at any given time, and provide an alternative explanation for observations that intracellular transport depends weakly on kinesin number in vivo.
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Abstract
The assembly of molecular motor proteins into multi-unit protein complexes plays an important role in determining the intracellular transport and trafficking properties of many subcellular commodities. Yet, it is not known how proteins within these complexes interact and function collectively. Considering the established ties between motor transport and diseases, it has become increasingly important to investigate the functional properties of these essential transport 'motifs'. Doing so requires that the composite motile and force-generating properties of multi-unit motor assemblies are characterized. However, such analyses are typically confounded by a lack of understanding of the links between the structural and mechanical properties of many motor complexes. New experimental challenges also emerge when one examines motor cooperation. Distributions in the mechanical microstates available to motor ensembles must be examined in order to fully understand the transport behavior of multi-motor complexes. Furthermore, mechanisms by which motors communicate must be explored to determine whether motor groups can move cargo together in a truly cooperative fashion. Resolving these issues requires the development of experimental methods that allow the dynamics of complex systems of transport proteins to be monitored with the same precision available to single-molecule biophysical assays. Herein, we discuss key fundamental principles governing the function of motor complexes and their relation to mechanisms that regulate intracellular cargo transport. We also outline new experimental strategies to resolve these essential features of intracellular transport.
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Affiliation(s)
- Pamela E Constantinou
- Department of Bioengineering, Rice University, 6100 Main Street, MS-142, Houston, TX77005 USA
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Zheng J, Birktoft JJ, Chen Y, Wang T, Sha R, Constantinou PE, Ginell SL, Mao C, Seeman NC. From molecular to macroscopic via the rational design of a self-assembled 3D DNA crystal. Nature 2009; 461:74-7. [PMID: 19727196 PMCID: PMC2764300 DOI: 10.1038/nature08274] [Citation(s) in RCA: 636] [Impact Index Per Article: 42.4] [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: 02/26/2009] [Accepted: 07/06/2009] [Indexed: 11/16/2022]
Abstract
We live in a macroscopic three-dimensional world, but our best description of the structure of matter is at the atomic and molecular scale. Understanding the relationship between the two scales requires that we bridge from the molecular world to the macroscopic world. Connecting these two domains with atomic precision is a central goal of the natural sciences, but it requires high spatial control of the 3D structure of matter.1 The simplest practical route to producing precisely designed 3D macroscopic objects is to form a crystalline arrangement by self-assembly, because such a periodic array has only conceptually simple requirements: [1] A motif whose 3D structure is robust, [2] dominant affinity interactions between parts of the motif when it self-associates, and [3] a predictable structures for these affinity interactions. Fulfilling all these criteria to produce a 3D periodic system is not easy, but it should readily be achieved by well-structured branched DNA motifs tailed by sticky ends.2 Complementary sticky ends associate with each other preferentially and assume the well-known B-DNA structure when they do so;3 the helically repeating nature of DNA facilitates the construction of a periodic array. It is key that the directions of propagation associated with the sticky ends not share the same plane, but extend to form a 3D arrangement of matter. Here, we report the crystal structure at 4 Å resolution of a designed, self-assembled, 3D crystal based on the DNA tensegrity triangle.4 The data demonstrate clearly that it is possible to design and self-assemble a well-ordered macromolecular 3D crystalline lattice with precise control.
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Affiliation(s)
- Jianping Zheng
- Department of Chemistry, New York University, New York 10003, USA
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21
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Rogers AR, Driver JW, Constantinou PE, Kenneth Jamison D, Diehl MR. Negative interference dominates collective transport of kinesin motors in the absence of load. Phys Chem Chem Phys 2009; 11:4882-9. [PMID: 19506763 DOI: 10.1039/b900964g] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The collective function of motor proteins is known to be important for the directed transport of many intracellular cargos. However, understanding how multiple motors function as a group remains challenging and requires new methods that enable determination of both the exact number of motors participating in motility and their organization on subcellular cargos. Here we present a biosynthetic method that enables exactly two kinesin-1 molecules to be organized on linear scaffolds that separate the motors by a distance of 50 nm. Tracking the motions of these complexes revealed that while two motors produce longer average run lengths than single kinesins, the system effectively behaves as though a single-motor attachment state dominates motility. It is proposed that negative motor interference derived from asynchronous motor stepping and the communication of forces between motors leads to this behavior by promoting the rapid exchange between different microtubule-bound configurations of the assemblies.
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Affiliation(s)
- Arthur R Rogers
- Rice University, Department of Chemistry, Houston, TX 77005, USA
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22
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Driver JW, Jamison KD, Constantinou PE, Rogers A, Diehl MR. Structure-activity Relationships In Synthetic Systems Of Coupled Motor Proteins. Biophys J 2009. [DOI: 10.1016/j.bpj.2008.12.2629] [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: 11/16/2022] Open
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23
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Schweller RM, Constantinou PE, Frankel NW, Narayan P, Diehl MR. Design of DNA-conjugated polypeptide-based capture probes for the anchoring of proteins to DNA matrices. Bioconjug Chem 2009; 19:2304-7. [PMID: 19053307 DOI: 10.1021/bc8003606] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A new method for protein surface functionalization was developed that utilizes DNA-conjugated artificial polypeptides to capture recombinant target proteins from the solution phase and direct their deposition onto DNA-functionalized matrices. Protein capture is accomplished through the coiled-coil association of an engineered pair of heterodimeric leucine zippers. Incorporating half of the zipper complex directly into the polypeptides and labeling these polymers with ssDNA enables the polypeptide conjugates to form intermediate linkages that connect the target proteins securely to DNA-functionalized supports. This synthetic route provides an important alternative to conventional DNA-conjugation techniques by allowing proteins to be outfitted site-specifically with ssDNA while minimizing the need for postexpression processing. We demonstrate these attributes by (i) using the capture probes to prepare protein microarrays, (ii) demonstrating control over enzyme activity via deposition of DNA, and, (iii) synthesizing finite-sized, multiprotein complexes that are templated on designed DNA scaffolds in near quantitative yield.
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Affiliation(s)
- Ryan M Schweller
- Department of Chemistry, Rice University, 6100 Main Street, MS 142 Houston, Texas 77005, USA
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24
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Zheng J, Constantinou PE, Micheel C, Alivisatos AP, Kiehl RA, Seeman NC. Two-dimensional nanoparticle arrays show the organizational power of robust DNA motifs. Nano Lett 2006; 6:1502-4. [PMID: 16834438 PMCID: PMC3465979 DOI: 10.1021/nl060994c] [Citation(s) in RCA: 185] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The bottom-up spatial organization of potential nanoelectronic components is a key intermediate step in the development of molecular electronics. We describe robust three-space-spanning DNA motifs that are used to organize nanoparticles in two dimensions. One strand of the motif ends in a gold nanoparticle; only one DNA strand is attached to the particle. By using two of the directions of the motif to produce a two-dimensional crystalline array, one direction is free to bind gold nanoparticles. Identical motifs, tailed in different sticky ends, enable the two-dimensional periodic ordering of 5 and 10 nm diameter gold nanoparticles.
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Affiliation(s)
| | | | - Christine Micheel
- Department of Chemistry, University of California, Berkeley, CA 94720
| | | | - Richard A. Kiehl
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 5541
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25
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Constantinou PE, Wang T, Kopatsch J, Israel LB, Zhang X, Ding B, Sherman WB, Wang X, Zheng J, Sha R, Seeman NC. Double cohesion in structural DNA nanotechnology. Org Biomol Chem 2006; 4:3414-9. [PMID: 17036134 PMCID: PMC3491902 DOI: 10.1039/b605212f] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Double cohesion has proved to be a useful tool to assemble robust 2D arrays of large tiles. Here we present a variety of examples showing the utility of this approach. We apply this principle to the 3 types of 2D lattice sections of arrays whose individual tiles are inherently 3 dimensional, because they contain three vectors that span 3-space. This application includes motifs which are based on the tensegrity triangle, the six-helix bundle motif and on three skewed triple crossover molecules. All of these designs have the potential to form 3 dimensional structures if all three directions of propagation are allowed. If one direction is blunted, 2D arrays form, and all 3 combinations are presented here. In addition, a large parallelogram array that was not attainable previously using single duplex cohesion was also constructed using double cohesion. For comparison, arrays which use another type of double cohesion, double paranemic (PX) cohesion are also presented. Double cohesion of sticky ends proved to be the more effective tool to assemble large motifs into arrays.
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26
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Birac JJ, Sherman WB, Kopatsch J, Constantinou PE, Seeman NC. Architecture with GIDEON, a program for design in structural DNA nanotechnology. J Mol Graph Model 2006; 25:470-80. [PMID: 16630733 PMCID: PMC3465968 DOI: 10.1016/j.jmgm.2006.03.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2005] [Revised: 03/15/2006] [Accepted: 03/16/2006] [Indexed: 11/24/2022]
Abstract
We present geometry based design strategies for DNA nanostructures. The strategies have been implemented with GIDEON-a graphical integrated development environment for oligonucleotides. GIDEON has a highly flexible graphical user interface that facilitates the development of simple yet precise models, and the evaluation of strains therein. Models are built on a simple model of undistorted B-DNA double-helical domains. Simple point and click manipulations of the model allow the minimization of strain in the phosphate-backbone linkages between these domains and the identification of any steric clashes that might occur as a result. Detailed analysis of 3D triangles yields clear predictions of the strains associated with triangles of different sizes. We have carried out experiments that confirm that 3D triangles form well only when their geometrical strain is less than 4% deviation from the estimated relaxed structure. Thus geometry-based techniques alone, without detailed energetic considerations, can be used to explain certain general trends in DNA structure formation. We have used GIDEON to build detailed models of double crossover and triple crossover molecules, evaluating the non-planarity associated with base tilt and junction misalignments. Computer modeling using a graphical user interface overcomes the limited precision of physical models for larger systems, and the limited interaction rate associated with earlier, command-line driven software.
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Affiliation(s)
- Jeffrey J Birac
- Department of Chemistry, New York University, New York, NY 10003, USA.
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27
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Seeman NC, Ding B, Liao S, Wang T, Sherman WB, Constantinou PE, Kopatsch J, Mao C, Sha R, Liu F, Yan H, Lukeman PS. Experiments in Structural DNA Nanotechnology: Arrays and Devices. Proc SPIE Int Soc Opt Eng 2005; 5592:10.1117/12.578118. [PMID: 24386524 PMCID: PMC3877303 DOI: 10.1117/12.578118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
In recent years, the chemistry of DNA has expanded from biological systems to nanotechnology. The generalization of the biological processes of reciprocal exchange leads to stable branched motifs that can be used for the construction of DNA-based geometrical and topological objects, arrays and nanomechanical devices. The information in DNA is the basis of life, but it can also be used to control the physical states of a variety of systems, leading ultimately to nanorobotics; these devices include shape-changing, walking and translating machines. We expect ultimately to be able to use the dynamic information-based architectural properties of nucleic acids to be the basis for advanced materials with applications from nanoelectronics to biomedical devices on the nanometer scale.
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Affiliation(s)
- Nadrian C Seeman
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Baoquan Ding
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Shiping Liao
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Tong Wang
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - William B Sherman
- Department of Chemistry, New York University, New York, NY 10003, USA
| | | | - Jens Kopatsch
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Chengde Mao
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Ruojie Sha
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Furong Liu
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - H Yan
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Philip S Lukeman
- Department of Chemistry, New York University, New York, NY 10003, USA
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