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Sung KS, Cho WH, Cha SH, Kim YW, Choi SH, Kim HJ, Yun MS. Saturated Fatty Acid Emulsions Open the Blood-Brain Barrier and Promote Drug Delivery in Rat Brains. Pharmaceutics 2024; 16:246. [PMID: 38399300 PMCID: PMC10893510 DOI: 10.3390/pharmaceutics16020246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 01/29/2024] [Accepted: 02/04/2024] [Indexed: 02/25/2024] Open
Abstract
We performed this study to evaluate whether saturated fatty acid (SFA) emulsions affect the BBB and determine the duration of BBB opening, thereby promoting drug delivery to the brain. Butyric, valeric, caproic, enanthic, and caprylic acid emulsions were infused into the carotid artery of the rat model. We evaluated the BBB opening and drug delivery over time. The trypan blue and doxorubicin delivery studies were repeated from 30 min to 6 h. In the 1 h rats in each group, transmission electron microscopy (TEM) was performed to morphologically evaluate tight junctions, and the delivery of temozolomide was assessed by desorption electrospray ionization mass spectrometry. The ipsilateral hemisphere was positive for trypan blue staining in all the five SFA emulsion groups. In the valeric, enanthic, and caprylic acid emulsion groups, RGB ratios were significantly higher at 30 min and decreased thereafter. Doxorubicin delivery increased in all emulsion groups at all time points. Tight junctions were observed to be open in all groups. TMZ delivery was significantly higher in the ipsilateral hemisphere. In conclusion, intra-arterially infused SFA emulsions opened the BBB and promoted drug delivery within 30 min, which decreased thereafter. Therefore, SFA emulsions may aid BBB research and promote drug delivery to the brain.
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Affiliation(s)
- Kyoung Su Sung
- Department of Neurosurgery, Dong-A University Hospital, Dong-A University College of Medicine, Busan 49201, Republic of Korea;
- Department of Medicine, The Graduate School of Medicine, Pusan National University, Busan 49241, Republic of Korea
| | - Won Ho Cho
- Department of Neurosurgery, Pusan National University Hospital, Biomedical Institute of Pusan National University Hospital, School of Medicine, Pusan National University, Busan 49241, Republic of Korea; (W.H.C.); (S.H.C.)
| | - Seung Heon Cha
- Department of Neurosurgery, Pusan National University Hospital, Biomedical Institute of Pusan National University Hospital, School of Medicine, Pusan National University, Busan 49241, Republic of Korea; (W.H.C.); (S.H.C.)
| | - Yong-Woo Kim
- Department of Radiology, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea;
| | - Seon Hee Choi
- Institute for Research and Industry Cooperation, Pusan National University, Busan 49241, Republic of Korea;
| | - Hak Jin Kim
- Department of Radiology, Pusan National University Hospital, Biomedical Institute of Pusan National University Hospital, School of Medicine, Pusan National University, Busan 49241, Republic of Korea
| | - Mi Sook Yun
- Division of Biostatistics, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan 50612, Republic of Korea;
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Strokotova AV, Sokolov DK, Molodykh OP, Koldysheva EV, Kliver EE, Ushakov VS, Politko MO, Mikhnevich NV, Kazanskaya GM, Aidagulova SV, Grigorieva EV. Prolonged use of temozolomide leads to increased anxiety and decreased content of aggrecan and chondroitin sulfate in brain tissues of aged rats. Biomed Rep 2024; 20:7. [PMID: 38124768 PMCID: PMC10729309 DOI: 10.3892/br.2023.1695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 11/13/2023] [Indexed: 12/23/2023] Open
Abstract
Chemotherapy with temozolomide (TMZ) is an essential part of anticancer therapy used for malignant tumors (mainly melanoma and glioblastoma); however, the long-term effects on patient health and life quality are not fully investigated. Considering that tumors often occur in elderly patients, the present study was conducted on long-term (4 months) treatment of adult Wistar rats (9 months old, n=40) with TMZ and/or dexamethasone (DXM) to investigate potential behavioral impairments or morphological and molecular changes in their brain tissues. According to the elevated plus maze test, long-term use of TMZ affected the anxiety of the adult Wistar rats, although no significant deterioration of brain morphology or cellular composition of the brain tissue was revealed. The expression levels of all studied heparan sulfate (HS) proteoglycans (HSPGs) (syndecan-1, syndecan-3, glypican-1 and HSPG2) and the majority of the studied chondroitin sulfate (CS) proteoglycans (CSPGs) (decorin, biglycan, lumican, brevican, neurocan aggrecan, versican, Cspg4/Ng2, Cspg5 and phosphacan) were not affected by TMZ/DXM, except for neurocan and aggrecan. Aggrecan was the most sensitive proteoglycan to TMZ/DXM treatment demonstrating downregulation of its mRNA and protein levels following TMZ (-10-fold), DXM (-45-fold) and TMZ-DXM (-80-fold) treatment. HS content was not affected by TMZ/DXM treatment, whereas CS content was decreased 1.5-2.5-fold in the TMZ- and DXM-treated brain tissues. Taken together, the results demonstrated that treatment of adult Wistar rats with TMZ had long-term effects on the brain tissues, such as decreased aggrecan core protein levels and CS chain content and increased anxiety of the experimental animals.
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Affiliation(s)
- Anastasia V. Strokotova
- Institute of Molecular Biology and Biophysics, Federal Research Center for Fundamental and Translational Medicine, Novosibirsk 630117, Russia
| | - Dmitry K. Sokolov
- Institute of Molecular Biology and Biophysics, Federal Research Center for Fundamental and Translational Medicine, Novosibirsk 630117, Russia
| | - Olga P. Molodykh
- Institute of Molecular Pathology and Pathomorphology, Federal Research Center for Fundamental and Translational Medicine, Novosibirsk 630117, Russia
| | - Elena V. Koldysheva
- Institute of Molecular Pathology and Pathomorphology, Federal Research Center for Fundamental and Translational Medicine, Novosibirsk 630117, Russia
| | - Evgenii E. Kliver
- Meshalkin National Medical Research Center, Novosibirsk 630055, Russia
- Laboratory of Cellular Biology and Fundamentals of Reproduction, Central Scientific Research Laboratory, Novosibirsk State Medical University, Novosibirsk 630091, Russia
| | - Victor S. Ushakov
- Institute of Molecular Biology and Biophysics, Federal Research Center for Fundamental and Translational Medicine, Novosibirsk 630117, Russia
| | - Maxim O. Politko
- Institute of Molecular Biology and Biophysics, Federal Research Center for Fundamental and Translational Medicine, Novosibirsk 630117, Russia
| | - Nadezhda V. Mikhnevich
- Institute of Molecular Biology and Biophysics, Federal Research Center for Fundamental and Translational Medicine, Novosibirsk 630117, Russia
| | - Galina M. Kazanskaya
- Institute of Molecular Biology and Biophysics, Federal Research Center for Fundamental and Translational Medicine, Novosibirsk 630117, Russia
| | - Svetlana V. Aidagulova
- Institute of Molecular Biology and Biophysics, Federal Research Center for Fundamental and Translational Medicine, Novosibirsk 630117, Russia
- Laboratory of Cellular Biology and Fundamentals of Reproduction, Central Scientific Research Laboratory, Novosibirsk State Medical University, Novosibirsk 630091, Russia
| | - Elvira V. Grigorieva
- Institute of Molecular Biology and Biophysics, Federal Research Center for Fundamental and Translational Medicine, Novosibirsk 630117, Russia
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Daisy Precilla S, Kuduvalli SS, Biswas I, Bhavani K, Pillai AB, Thomas JM, Anitha TS. Repurposing synthetic and natural derivatives induces apoptosis in an orthotopic glioma-induced xenograft model by modulating WNT/β-catenin signaling. Fundam Clin Pharmacol 2023; 37:1179-1197. [PMID: 37458120 DOI: 10.1111/fcp.12932] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 05/09/2023] [Accepted: 06/09/2023] [Indexed: 07/18/2023]
Abstract
BACKGROUND Glioblastomas arise from multistep tumorigenesis of the glial cells. Despite the current state-of-art treatment, tumor recurrence is inevitable. Among the innovations blooming up against glioblastoma, drug repurposing could provide profound premises for treatment enhancement. While considering this strategy, the efficacy of the repurposed drugs as monotherapies were not up to par; hence, the focus has now shifted to investigate the multidrug combinations. AIM To investigate the efficacy of a quadruple-combinatorial treatment comprising temozolomide along with chloroquine, naringenin, and phloroglucinol in an orthotopic glioma-induced xenograft model. METHODS Antiproliferative effect of the drugs was assessed by immunostaining. The expression profiles of WNT/β-catenin and apoptotic markers were evaluated by qRT-PCR, immunoblotting, and ELISA. Patterns of mitochondrial depolarization was determined by flow cytometry. TUNEL assay was performed to affirm apoptosis induction. In vivo drug detection study was carried out by ESI-Q-TOF MS analysis. RESULTS The quadruple-drug treatment had significantly hampered glioma proliferation and had induced apoptosis by modulating the WNT/β-catenin signaling. Interestingly, the induction of apoptosis was associated with mitochondrial depolarization. The quadruple-drug cocktail had breached the blood-brain barrier and was detected in the brain tissue and plasma samples. CONCLUSION The quadruple-drug combination served as a promising adjuvant therapy to combat glioblastoma lethality in vivo and can be probed for translation from bench to bedside.
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Affiliation(s)
- Senthilathiban Daisy Precilla
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, 607 403, India
| | - Shreyas S Kuduvalli
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, 607 403, India
| | - Indrani Biswas
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, 607 403, India
| | - Krishnamurthy Bhavani
- Department of Pathology, Mahatma Gandhi Medical College and Research Institute (MGMCRI), Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, 607 403, India
| | - Agieshkumar Balakrishna Pillai
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, 607 403, India
| | - Jisha Mary Thomas
- Catalysis and Energy Laboratory, Department of Chemistry, Pondicherry University, Puducherry, 605 014, India
| | - Thirugnanasambandhar Sivasubramanian Anitha
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, 607 403, India
- Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry, 605 014, India
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Shuai SY, Liu SS, Liu XJ, Zhang GS, Zheng Q, Yue PF, Yang M, Hu PY. Essential oil of Ligusticum chuanxiong Hort. Regulated P-gp protein and tight junction protein to change pharmacokinetic parameters of temozolomide in blood, brain and tumor. JOURNAL OF ETHNOPHARMACOLOGY 2022; 298:115646. [PMID: 36031103 DOI: 10.1016/j.jep.2022.115646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 08/08/2022] [Accepted: 08/13/2022] [Indexed: 06/15/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The existence of the blood-brain barrier/blood tumor barrier (BBB/BTB) severely restricts the effectiveness of anti-tumor drugs, thus glioma is still an incurable disease with a high fatality rate. Chuanxiong (Ligusticum chuanxiong Hort., Umbelliferae) was used as a messenger drug to increase the distribution of drugs in brain tissue, and its application in Chinese herbal formula for treating glioma was also the highest. AIM OF THE STUDY Our previous researches showed that essential oil (EO) of chuanxiong could promote temozolomide (TMZ) entry into glioma cells in vitro and enhance TMZ-induced anticancer efficiency in vivo, and therefore, the aim of this study was to investigate whether EO could increase the concentration accumulation of TMZ in brain or tumor of C6 glioma rats and the related mechanisms. MATERIALS AND METHODS The pharmacokinetics were conducted in C6 glioma rats by administering either TMZ alone or combined with EO through oral routes. TMZ concentration in blood, brain and tumor was detected using liquid chromatography-mass spectrometry/mass spectrometry (LC-MS/MS) and then pharmacokinetic parameters were calculated. The changed expressions of P-gp protein, tight junction occludin, claudin-5 and zonula occludens-1 (ZO-1) in brain of glioma rats were studied by Western blot to clarify the mechanism. Finally, the chemical composition of EO was analyzed by gas chromatography-massspectrometry (GC-MS). RESULTS The results showed that EO significantly affected the pharmacokinetic parameters such as Tmax, Cmax and CL (p < 0.01), but did not significantly change the AUC(0→∞) of TMZ in blood (p > 0.05). However, EO markedly improved the AUC(0→∞)of TMZ in brain and tumor (p < 0.01). The calculate drug targeting index was greater than 1, indicating that EO could promote the distribution of TMZ to the brain and tumor. Western blot analysis showed that EO significantly inhibited the expression of P-gp, tight junction protein claudin-5, occludin and ZO-1. And meanwhile, the expressions of P-gp, claudin-5 and occludin also markedly down-regulated in EO-TMZ co-administration treatment. GC-MS analysis of the TIC component of EO was (E)-Ligustilide (36.93%), Terpinolene (7.245%), gamma-terpinene (7.225%) etc. CONCLUSION: EO could promote the distribution of TMZ in the brain and tumor of C6 glioma rats, which may attribute to down-regulate the expression of P-gp, claudin-5 and occludin.
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Affiliation(s)
- Shu-Yuan Shuai
- Key Lab of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang, 330004, China.
| | - Shan-Shan Liu
- Key Lab of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang, 330004, China.
| | - Xiao-Jin Liu
- Key Lab of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang, 330004, China.
| | - Guo-Song Zhang
- Key Lab of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang, 330004, China.
| | - Qin Zheng
- Key Lab of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang, 330004, China.
| | - Peng-Fei Yue
- Key Lab of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang, 330004, China.
| | - Ming Yang
- Key Lab of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang, 330004, China.
| | - Peng-Yi Hu
- Key Lab of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang, 330004, China.
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Shervington LA, Ingham O. Investigating the Stability of Six Phenolic TMZ Ester Analogues, Incubated in the Presence of Porcine Liver Esterase and Monitored by HPLC. Molecules 2022; 27:2958. [PMID: 35566308 PMCID: PMC9103334 DOI: 10.3390/molecules27092958] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 11/30/2022] Open
Abstract
Previous published data from our group showed the encouraging in vitro activities of six phenolic temozolomide (TMZ) ester analogues (ES8-ES12 and ES14) with up to a five-fold increase in potency compared to TMZ against glioblastoma multiform cell lines and TMZ-resistant O6-methylguanine-DNA methyl transferase (MGMT)-positive primary cells. This study investigated the stabilities of the six phenolic TMZ ester analogues in the presence of porcine liver esterase (PLE) as a hydrolytic enzyme, using high-performance liquid chromatography (HPLC), monitored by a diode-array detector (DAD). Determining the rates of hydrolysis of the esters provided a useful insight into the feasibility of progressing them to the next phase of drug development. Fifty percent of TMZ esters consisting of para nitro, chloro, phenyl and tolyl groups (ES9, ES10, ES12 and ES14) were hydrolysed within the first 4.2 min of PLE exposure, while the TMZ esters consisting of para methoxy and nitrile groups (ES8 and ES11) demonstrated increased stability, with 50% hydrolysis achieved in 7.3 and 13.7 min, respectively. In conclusion, the survival of these phenolic TMZ esters on route to the target site of a brain tumor would be a challenge, mainly due to the undesirable rapid rate of hydrolysis. These findings therefore pose a question regarding the effectiveness of these esters in an in vivo setting.
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Affiliation(s)
- Leroy A. Shervington
- School of Pharmacy and Biomedical Sciences, University of Central Lancashire, Preston PR1 2HE, UK
| | - Oliver Ingham
- Kindeva Drug Delivery, Bakewell Road, Loughborough LE11 5RB, UK;
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Beg S, Panda SS, Singh KK. Chemometrics-assisted development of a validated LC method for simultaneous estimation of temozolomide and γ-linolenic acid: greenness assessment and application to lipidic nanoparticles. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1200:123261. [DOI: 10.1016/j.jchromb.2022.123261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 04/20/2022] [Indexed: 11/27/2022]
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Svec RL, McKee SA, Berry MR, Kelly AM, Fan TM, Hergenrother PJ. Novel Imidazotetrazine Evades Known Resistance Mechanisms and Is Effective against Temozolomide-Resistant Brain Cancer in Cell Culture. ACS Chem Biol 2022; 17:299-313. [PMID: 35119837 DOI: 10.1021/acschembio.2c00022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Glioblastoma (GBM) is the most lethal primary brain tumor. Currently, frontline treatment for primary GBM includes the DNA-methylating drug temozolomide (TMZ, of the imidazotetrazine class), while the optimal treatment for recurrent GBM remains under investigation. Despite its widespread use, a majority of GBM patients do not respond to TMZ therapy; expression of the O6-methylguanine DNA methyltransferase (MGMT) enzyme and loss of mismatch repair (MMR) function as the principal clinical modes of resistance to TMZ. Here, we describe a novel imidazotetrazine designed to evade resistance by MGMT while retaining suitable hydrolytic stability, allowing for effective prodrug activation and biodistribution. This dual-substituted compound, called CPZ, exhibits activity against cancer cells irrespective of MGMT expression and MMR status. CPZ has greater blood-brain barrier penetrance and comparable hematological toxicity relative to TMZ, while also matching its maximum tolerated dose in mice when dosed once-per-day over five days. The activity of CPZ is independent of the two principal mechanisms suppressing the effectiveness of TMZ, making it a promising new candidate for the treatment of GBM, especially those that are TMZ-resistant.
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Affiliation(s)
- Riley L. Svec
- Department of Chemistry and Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Sydney A. McKee
- Department of Chemistry and Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Matthew R. Berry
- Department of Veterinary Clinical Medicine, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Aya M. Kelly
- Department of Chemistry and Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Timothy M. Fan
- Department of Veterinary Clinical Medicine, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Paul J. Hergenrother
- Department of Chemistry and Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Cancer Center at Illinois, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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Sandbhor P, Goda J, Mohanty B, Chaudhari P, Dutt S, Banerjee R. Non-invasive transferrin targeted nanovesicles sensitize resistant glioblastoma multiforme tumors and improve survival in orthotopic mouse models. NANOSCALE 2021; 14:108-126. [PMID: 34897360 DOI: 10.1039/d1nr05460k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The blood-brain barrier (BBB) and tumor heterogeneity have resulted in abysmally poor clinical outcomes in glioblastoma (GBM) with the standard therapeutic regimen. Despite several anti-glioma drug delivery strategies, the lack of adequate chemotherapeutic bioavailability in gliomas has led to a suboptimal therapeutic gain in terms of improvement in survival and increased systemic toxicities. This has paved the way for designing highly specific and non-invasive drug delivery approaches for treating GBM. The intranasal (IN) route is one such delivery strategy that has the potential to reach the brain parenchyma by circumventing the BBB. We recently showed that in situ hydrogel embedded with miltefosine (HePc, proapoptotic anti-tumor agent) and temozolomide (TMZ, DNA methylating agent) loaded targeted nanovesicles prevented tumor relapses in orthotopic GBM mouse models. In this study, we specifically investigated the potential of a non-invasive IN route of TMZ delivered from lipid nanovesicles (LNs) decorated with surface transferrin (Tf) and co-encapsulated with HePc to reach the brain by circumventing the BBB in glioma bearing mice. The targeted nanovesicles (228.3 ± 10 nm, -41.7 ± 4 mV) exhibited mucoadhesiveness with 2% w/v mucin suggesting their potential to increase brain drug bioavailability after IN administration. The optimized TLNs had controlled, tunable and significantly different release kinetics in simulated cerebrospinal fluid and simulated nasal fluid demonstrating efficient release of the payload upon reaching the brain. Drug synergy (combination index, 0.7) showed a 6.4-fold enhanced cytotoxicity against resistant U87MG cells compared to free drugs. In vivo gamma scintigraphy of 99mTc labeled LNs showed 500- and 280-fold increased brain concentration post 18 h of treatment. The efficacy of the TLNs increased by 1.8-fold in terms of survival of tumor-bearing mice compared to free drugs. These findings suggested that targeted drug synergy has the potential to intranasally deliver a high therapeutic dose of the chemotherapy agent (TMZ) and could serve as a platform for future clinical application.
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Affiliation(s)
- Puja Sandbhor
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Bombay, Powai, Mumbai, India.
| | - Jayant Goda
- Department of Radiation Oncology ACTREC, Tata Memorial Center, Kharghar Navi-Mumbai, India.
| | - Bhabani Mohanty
- Department of Comparative Oncology and Small Animal Imaging Facility, ACTREC, Tata Memorial Center, Kharghar Navi-Mumbai, India
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Bombay, Powai, Mumbai, India.
| | - Pradip Chaudhari
- Department of Radiation Oncology ACTREC, Tata Memorial Center, Kharghar Navi-Mumbai, India.
- Department of Comparative Oncology and Small Animal Imaging Facility, ACTREC, Tata Memorial Center, Kharghar Navi-Mumbai, India
| | - Shilpee Dutt
- Department Shilpee Lab/DNA Repair and Cellular Oncology Lab, ACTREC, Tata Memorial Center, Kharghar Navi-Mumbai, India
| | - Rinti Banerjee
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Bombay, Powai, Mumbai, India.
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Seung WB, Cha SH, Kim HJ, Choi SH, Lee J, Kwak D, Hyun Woo K, You JW, Kim YW, Kim SK, Lee DS. Triolein emulsion enhances temozolomide brain delivery: an experimental study in rats. Drug Deliv 2021; 28:2373-2382. [PMID: 34747271 PMCID: PMC8583762 DOI: 10.1080/10717544.2021.1998247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Purpose To evaluate the enhancement of temozolomide (TMZ) delivery in the rat brain using a triolein emulsion. Materials and Methods Rats were divided into the five groups as following: group 1 (negative control), group 2 (treated with triolein emulsion and TMZ 20 mg/kg), and group 3 (TMZ 20 mg/kg treatment without triolein), group 4 (treated with triolein emulsion and TMZ 10 mg/kg), and group 5 (TMZ 10 mg/kg treatment without triolein). Triolein emulsion was infused into the right common carotid artery. One hour later, the TMZ concentration was evaluated quantitatively and qualitatively using high-performance liquid chromatography (HPLC-MS) and desorption electrospray ionization mass spectrometry (DESI-MS) imaging, respectively. The concentration ratios of the ipsilateral to contralateral hemisphere in each group were determined and the statistical analysis was conducted using an unpaired t-test. Results Quantitatively, the TMZ concentration ratio of the ipsilateral to the control hemisphere was 2.41 and 1.13 in groups 2 and 3, and were 2.49 and 1.14 in groups 4 and 5, respectively. Thus, the TMZ signal intensities of TMZ in group 2 and 4 were statistically high in the ipsilateral hemispheres. Qualitatively, the signal intensity of TMZ was remarkably high in the ipsilateral hemisphere in group 2 and 4. Conclusions The triolein emulsion efficiently opened the blood-brain barrier and could provide a potential new strategy to enhance the therapeutic effect of TMZ. HPLC-MS and DESI-MS imaging were shown to be suitable for analyses of enhancement of brain TMZ concentrations.
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Affiliation(s)
- Won-Bae Seung
- Department of Neurosurgery, Dongguk University College of Medicine, Dongguk University Gyeongju Hospital, Gyeongju, South Korea.,Department of Neurosurgery, SMG Yeonse Hospital, Changwon, South Korea
| | - Seung Heon Cha
- College of Medicine, Pusan National University, Busan, Korea.,Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Hak Jin Kim
- College of Medicine, Pusan National University, Busan, Korea.,Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Seon Hee Choi
- College of Medicine, Pusan National University, Busan, Korea.,Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Juho Lee
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Dongmin Kwak
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Kim Hyun Woo
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Jin-Wook You
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Yong-Woo Kim
- Pusan National University Yangsan Hospital, College of Medicine, Pusan National University, Busan, South Korea
| | - Sang Kyoon Kim
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, Korea
| | - Da-Sol Lee
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, Korea
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Abstract
For a chemotherapeutic agent to be effective, it must conquer the presence of blood-brain barrier (BBB), which limits the penetration of drugs into the brain. Tumours in the brain compromise the integrity of BBB and result in a highly heterogeneous vasculature, known as blood-brain tumour barrier (BBTB). In this chapter, we firstly highlight the cellular and molecular characteristics of the BBB and BBTB as well as the challenges aroused by BBB/BBTB for drug delivery. Secondly, we discuss the current strategies overcoming the challenges in invasive and non-invasive manners. Finally, we highlight the emerging strategy using focused ultrasound (FUS) with systemic microbubbles to transiently and reversibly enhance the permeability of these barriers for drug delivery.
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Cho HY, Swenson S, Thein TZ, Wang W, Wijeratne NR, Marín-Ramos NI, Katz JE, Hofman FM, Schönthal AH, Chen TC. Pharmacokinetic properties of the temozolomide perillyl alcohol conjugate (NEO212) in mice. Neurooncol Adv 2020; 2:vdaa160. [PMID: 33392507 PMCID: PMC7764505 DOI: 10.1093/noajnl/vdaa160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Background NEO212 is a novel small-molecule anticancer agent that was generated by covalent conjugation of the natural monoterpene perillyl alcohol (POH) to the alkylating agent temozolomide (TMZ). It is undergoing preclinical development as a therapeutic for brain-localized malignancies. The aim of this study was to characterize metabolism and pharmacokinetic (PK) properties of NEO212 in preclinical models. Methods We used mass spectrometry (MS) and modified high-performance liquid chromatography to identify and quantitate NEO212 and its metabolites in cultured glioblastoma cells, in mouse plasma, brain, and excreta after oral gavage. Results Our methods allowed identification and quantitation of NEO212, POH, TMZ, as well as primary metabolites 5-aminoimidazole-4-carboxamide (AIC) and perillic acid (PA). Intracellular concentrations of TMZ were greater after treatment of U251TR cells with NEO212 than after treatment with TMZ. The half-life of NEO212 in mouse plasma was 94 min. In mice harboring syngeneic GL261 brain tumors, the amount of NEO212 was greater in the tumor-bearing hemisphere than in the contralateral normal hemisphere. The brain:plasma ratio of NEO212 was greater than that of TMZ. Excretion of unaltered NEO212 was through feces, whereas its AIC metabolite was excreted via urine. Conclusions NEO212 preferentially concentrates in brain tumor tissue over normal brain tissue, and compared to TMZ has a higher brain:plasma ratio, altogether revealing favorable features to encourage its further development as a brain-targeted therapeutic. Its breakdown into well-characterized, long-lived metabolites, in particular AIC and PA, will provide useful equivalents for PK studies during further drug development and clinical trials with NEO212.
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Affiliation(s)
- Hee-Yeon Cho
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Steve Swenson
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Thu Zan Thein
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Weijun Wang
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Neloni R Wijeratne
- Lawrence J. Ellison Institute for Transformative Medicine, University of Southern California, Los Angeles, California, USA
| | - Nagore I Marín-Ramos
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Jonathan E Katz
- Lawrence J. Ellison Institute for Transformative Medicine, University of Southern California, Los Angeles, California, USA
| | - Florence M Hofman
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, California, USA.,Department of Pathology Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Axel H Schönthal
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Thomas C Chen
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, California, USA.,Department of Pathology Keck School of Medicine, University of Southern California, Los Angeles, California, USA
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12
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Sphenopalatine Ganglion Stimulation Upregulates Transport of Temozolomide across the Blood-Brain Barrier. Sci Pharm 2020. [DOI: 10.3390/scipharm88030040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Sphenopalatine ganglion (SPG) stimulation has been shown to reversibly alter blood-brain barrier (BBB) permeability. It is widely used for the treatment of cluster headaches in Europe and is well tolerated in humans. The therapeutic potential for SPG stimulation in other central nervous system (CNS) diseases has yet to be explored. Glioblastoma Multiforme (GBM) remains one of the most difficult primary CNS neoplasms to treat, with an average survival of approximately 18 months at the time of diagnosis. Since 2004, the gold standard of treatment for GBM in the United States includes surgery followed by treatment with temozolomide (TMZ) and radiation. We sought to determine if SPG stimulation could increase chemotherapy concentrations in rodent brains with an intact BBB. Here, we show a statistically significant (p = 0.0006), five-fold upregulation of TMZ crossing the BBB and reaching brain parenchyma in rats receiving low-frequency (LF, 10 Hz) SPG stimulation. All the measurements were performed using a highly sensitive liquid chromatography mass spectrometry (LCMS) method that was developed for quantitation of TMZ in plasma and brain tissue. Our treatment paradigm shows novel delivery route by which we could more effectively and safely deliver TMZ in a targeted manner, to minimize systemic toxicity and maximize action at the target tissue.
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13
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Herbener VJ, Burster T, Goreth A, Pruss M, von Bandemer H, Baisch T, Fitzel R, Siegelin MD, Karpel-Massler G, Debatin KM, Westhoff MA, Strobel H. Considering the Experimental use of Temozolomide in Glioblastoma Research. Biomedicines 2020; 8:E151. [PMID: 32512726 PMCID: PMC7344626 DOI: 10.3390/biomedicines8060151] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 05/30/2020] [Accepted: 05/31/2020] [Indexed: 12/17/2022] Open
Abstract
Temozolomide (TMZ) currently remains the only chemotherapeutic component in the approved treatment scheme for Glioblastoma (GB), the most common primary brain tumour with a dismal patient's survival prognosis of only ~15 months. While frequently described as an alkylating agent that causes DNA damage and thus-ultimately-cell death, a recent debate has been initiated to re-evaluate the therapeutic role of TMZ in GB. Here, we discuss the experimental use of TMZ and highlight how it differs from its clinical role. Four areas could be identified in which the experimental data is particularly limited in its translational potential: 1. transferring clinical dosing and scheduling to an experimental system and vice versa; 2. the different use of (non-inert) solvent in clinic and laboratory; 3. the limitations of established GB cell lines which only poorly mimic GB tumours; and 4. the limitations of animal models lacking an immune response. Discussing these limitations in a broader biomedical context, we offer suggestions as to how to improve transferability of data. Finally, we highlight an underexplored function of TMZ in modulating the immune system, as an example of where the aforementioned limitations impede the progression of our knowledge.
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Affiliation(s)
- Verena J. Herbener
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, D-89075 Ulm, Germany; (V.J.H.); (A.G.); (H.v.B.); (T.B.); (R.F.); (K.-M.D.); (H.S.)
| | - Timo Burster
- Department of Biology, School of Sciences and Humanities, Nazarbayev University, Nur-Sultan 010000, Kazakhstan;
| | - Alicia Goreth
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, D-89075 Ulm, Germany; (V.J.H.); (A.G.); (H.v.B.); (T.B.); (R.F.); (K.-M.D.); (H.S.)
| | - Maximilian Pruss
- Department of Gynecology and Obstetrics, Medical Faculty, University Hospital of the Heinrich-Heine-University Duesseldorf, D-40225 Duesseldorf, Germany;
- Department of Neurosurgery, University Medical Center Ulm, D-89081 Ulm, Germany;
| | - Hélène von Bandemer
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, D-89075 Ulm, Germany; (V.J.H.); (A.G.); (H.v.B.); (T.B.); (R.F.); (K.-M.D.); (H.S.)
| | - Tim Baisch
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, D-89075 Ulm, Germany; (V.J.H.); (A.G.); (H.v.B.); (T.B.); (R.F.); (K.-M.D.); (H.S.)
| | - Rahel Fitzel
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, D-89075 Ulm, Germany; (V.J.H.); (A.G.); (H.v.B.); (T.B.); (R.F.); (K.-M.D.); (H.S.)
| | - Markus D. Siegelin
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY 10032, USA;
| | - Georg Karpel-Massler
- Department of Neurosurgery, University Medical Center Ulm, D-89081 Ulm, Germany;
| | - Klaus-Michael Debatin
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, D-89075 Ulm, Germany; (V.J.H.); (A.G.); (H.v.B.); (T.B.); (R.F.); (K.-M.D.); (H.S.)
| | - Mike-Andrew Westhoff
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, D-89075 Ulm, Germany; (V.J.H.); (A.G.); (H.v.B.); (T.B.); (R.F.); (K.-M.D.); (H.S.)
| | - Hannah Strobel
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, D-89075 Ulm, Germany; (V.J.H.); (A.G.); (H.v.B.); (T.B.); (R.F.); (K.-M.D.); (H.S.)
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14
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Wang D, Wang C, Wang L, Chen Y. A comprehensive review in improving delivery of small-molecule chemotherapeutic agents overcoming the blood-brain/brain tumor barriers for glioblastoma treatment. Drug Deliv 2020; 26:551-565. [PMID: 31928355 PMCID: PMC6534214 DOI: 10.1080/10717544.2019.1616235] [Citation(s) in RCA: 92] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Glioblastoma (GBM) is the most common and lethal primary brain tumor which is highly resistant to conventional radiotherapy and chemotherapy, and cannot be effectively controlled by surgical resection. Due to inevitable recurrence of GBM, it remains essentially incurable with a median overall survival of less than 18 months after diagnosis. A great challenge in current therapies lies in the abrogated delivery of most of the chemotherapeutic agents to the tumor location in the presence of blood-brain barrier (BBB) and blood-brain tumor barrier (BBTB). These protective barriers serve as a selectively permeable hurdle reducing the efficacy of anti-tumor drugs in GBM therapy. This work systematically gives a comprehensive review on: (i) the characteristics of the BBB and the BBTB, (ii) the influence of BBB/BBTB on drug delivery and the screening strategy of small-molecule chemotherapeutic agents with promising BBB/BBTB-permeable potential, (iii) the strategies to overcome the BBB/BBTB as well as the techniques which can lead to transient BBB/BBTB opening or disruption allowing for improving BBB/BBTB-penetration of drugs. It is hoped that this review provide practical guidance for the future development of small BBB/BBTB-permeable agents against GBM as well as approaches enhancing drug delivery across the BBB/BBTB to GBM.
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Affiliation(s)
- Da Wang
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China
| | - Chao Wang
- Department of Chemistry, Yale University, New Haven, CT, USA
| | - Liang Wang
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China
| | - Yue Chen
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China
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15
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Afzalipour R, Khoei S, Khoee S, Shirvalilou S, Jamali Raoufi N, Motevalian M, Karimi MR. Dual-Targeting Temozolomide Loaded in Folate-Conjugated Magnetic Triblock Copolymer Nanoparticles to Improve the Therapeutic Efficiency of Rat Brain Gliomas. ACS Biomater Sci Eng 2019; 5:6000-6011. [PMID: 33405722 DOI: 10.1021/acsbiomaterials.9b00856] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In order to conduct an effective chemotherapy session as a treatment modality for glioblastoma tumors, a nanocarrier platform is required for the drug to cross the blood brain barrier (BBB) successfully and properly target glioma cells. Dual-targeting Temozolomide (TMZ) loaded triblock polymer coated magnetic nanoparticles (MNPs) were synthesized with a SPION core and by conjugating the surface with folic acid (FA), which were shown to effectively pass the BBB and target tumor cells. Two principal methods, dynamic light scattering (DLS) and transmission electron microscopy (TEM) were employed for characterization of the synthesized nanoparticles. TMZ-loaded MNP-FA nanoparticles presented with a size of 58.61 nm, a zeta potential of -29.85 ± 0.47 mV, and a drug loading content of 6.85 ± 0.46%. Data gathered from inductively coupled plasma optical emission spectrometry (ICP-OES) and Prussian blue staining indicated effective dual-targeting, which subsequently led to an appreciably enhanced penetration through the BBB and accumulation of MNPs-FA in rat glioma cells. The anticancer effect of the dual-targeting MNPs-FA was also indicated by the increased survival time (>100%, p < 0.001) and decreased tumor volume (p < 0.001). In conclusion, the dual-targeting TMZ-loaded MNPs-FA are able to improve therapeutic efficiency toward brain gliomas in rats.
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Affiliation(s)
| | | | - Sepideh Khoee
- Department of Polymer Chemistry, School of Chemistry, College of Science, University of Tehran, Enghelab Street, Tehran, Iran
| | | | | | | | - Mohammad Reza Karimi
- Department of Polymer Chemistry, School of Chemistry, College of Science, University of Tehran, Enghelab Street, Tehran, Iran
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16
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Kitabayashi T, Dong Y, Furuta T, Sabit H, Jiapaer S, Zhang J, Zhang G, Hayashi Y, Kobayashi M, Domoto T, Minamoto T, Hirao A, Nakada M. Identification of GSK3β inhibitor kenpaullone as a temozolomide enhancer against glioblastoma. Sci Rep 2019; 9:10049. [PMID: 31296906 PMCID: PMC6624278 DOI: 10.1038/s41598-019-46454-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 06/28/2019] [Indexed: 11/14/2022] Open
Abstract
Cancer stem cells are associated with chemoresistance and rapid recurrence of malignant tumors, including glioblastoma (GBM). Although temozolomide (TMZ) is the most effective drug treatment for GBM, GBM cells acquire resistance and become refractory to TMZ during treatment. Therefore, glioma stem cell (GSC)-targeted therapy and TMZ-enhancing therapy may be effective approaches to improve GBM prognosis. Many drugs that suppress the signaling pathways that maintain GSC or enhance the effects of TMZ have been reported. However, there are no established therapies beyond TMZ treatment currently in use. In this study, we screened drug libraries composed of 1,301 existing drugs using cell viability assays to evaluate effects on GSCs, which led to selection of kenpaullone, a kinase inhibitor, as a TMZ enhancer targeting GSCs. Kenpaullone efficiently suppressed activity of glycogen synthase kinase (GSK) 3β. Combination therapy with kenpaullone and TMZ suppressed stem cell phenotype and viability of both GSCs and glioma cell lines. Combination therapy in mouse models significantly prolonged survival time compared with TMZ monotherapy. Taken together, kenpaullone is a promising drug for treatment of GBM by targeting GSCs and overcoming chemoresistance to TMZ.
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Affiliation(s)
- Tomohiro Kitabayashi
- Department of Neurosurgery, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Yu Dong
- Department of Neurosurgery, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan.,Department of Neurosurgery, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - Takuya Furuta
- Department of Pathology, Kurume University School of Medicine, Kurume, Japan
| | - Hemragul Sabit
- Department of Neurosurgery, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Shabierjiang Jiapaer
- Department of Neurosurgery, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Jiakang Zhang
- Department of Neurosurgery, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan.,Department of Neurosurgery, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - Guangtao Zhang
- Department of Neurosurgery, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan.,Department of Neurosurgery, The First Hospital of Jilin University, Changchun, People's Republic of China
| | - Yasuhiko Hayashi
- Department of Neurosurgery, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Masahiko Kobayashi
- Division of Molecular Genetics, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Takahiro Domoto
- Division of Translational and Clinical Oncology, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Toshinari Minamoto
- Division of Translational and Clinical Oncology, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Atsushi Hirao
- Division of Molecular Genetics, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Mitsutoshi Nakada
- Department of Neurosurgery, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan.
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17
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El Mubarak MA, Stylos EK, Chatziathanasiadou MV, Danika C, Alexiou GA, Tsekeris P, Renziehausen A, Crook T, Syed N, Sivolapenko GB, Tzakos AG. Development and validation of simple step protein precipitation UHPLC-MS/MS methods for quantitation of temozolomide in cancer patient plasma samples. J Pharm Biomed Anal 2019; 162:164-170. [DOI: 10.1016/j.jpba.2018.09.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 09/05/2018] [Accepted: 09/07/2018] [Indexed: 11/16/2022]
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18
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Svec RL, Furiassi L, Skibinski CG, Fan TM, Riggins GJ, Hergenrother PJ. Tunable Stability of Imidazotetrazines Leads to a Potent Compound for Glioblastoma. ACS Chem Biol 2018; 13:3206-3216. [PMID: 30296373 PMCID: PMC6243397 DOI: 10.1021/acschembio.8b00864] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Even
in the era of personalized medicine and immunotherapy, temozolomide
(TMZ), a small molecule DNA alkylating agent, remains the standard-of-care
for glioblastoma (GBM). TMZ has an unusual mode-of-action, spontaneously
converting to its active component via hydrolysis in vivo. While TMZ has been FDA approved for two decades, it provides little
benefit to patients whose tumors express the resistance enzyme MGMT
and gives rise to systemic toxicity through myelosuppression. TMZ
was first synthesized in 1984, but certain key derivatives have been
inaccessible due to the chemical sensitivity of TMZ, precluding broad
exploration of the link between imidazotetrazine structure and biological
activity. Here, we sought to discern the relationship between the
hydrolytic stability and anticancer activity of imidazotetrazines,
with the objectives of identifying optimal timing for prodrug activation
and developing suitable compounds with enhanced efficacy via increased
blood-brain barrier penetrance. This work necessitated the development
of new synthetic methods to provide access to previously unexplored
functionality (such as aliphatic, ketone, halogen, and aryl groups)
at the C8 position of imidazotetrazines. Through synthesis and evaluation
of a suite of compounds with a range of aqueous stabilities (from
0.5 to 40 h), we derive a predictive model for imidazotetrazine hydrolytic
stability based on the Hammett constant of the C8 substituent. Promising
compounds were identified that possess activity against a panel of
GBM cell lines, appropriate hydrolytic and metabolic stability, and
brain-to-serum ratios dramatically elevated relative to TMZ, leading
to lower hematological toxicity profiles and superior activity to
TMZ in a mouse model of GBM. This work points a clear path forward
for the development of novel and effective anticancer imidazotetrazines.
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Affiliation(s)
| | | | - Christine G. Skibinski
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, United States
| | | | - Gregory J. Riggins
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, United States
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19
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Opening the Blood-Brain Barrier and Improving the Efficacy of Temozolomide Treatments of Glioblastoma Using Pulsed, Focused Ultrasound with a Microbubble Contrast Agent. BIOMED RESEARCH INTERNATIONAL 2018; 2018:6501508. [PMID: 30534564 PMCID: PMC6252217 DOI: 10.1155/2018/6501508] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 10/22/2018] [Accepted: 10/30/2018] [Indexed: 11/17/2022]
Abstract
Objective To explore the effects of pulsed, focused, and microbubble contrast agent-enhanced ultrasonography (mCEUS) on blood-brain barrier (BBB) permeability and the efficacy temozolomide for glioblastoma. Methods Wistar rats (n = 30) were divided into three groups (n = 10 per group) to determine optimal CUES conditions for achieving BBB permeability, as assessed by ultrastructure transmission electron microscopy (TEM) and western blot assays for the tight junction protein claudin-5. Optimized mCEUS effects on BBB permeability were subsequently confirmed with Evans blue staining (2 groups of 10 rats). The glioma cell line 9L was injected into the brain striatum of Wistar rats. After temozolomide chemotherapy, we detected glial fibrillary acidic protein (GFAP) levels in serum by enzyme-linked immunosorbent assay (ELISA) and in brain tissue by western blot, immunocytochemistry, and real-time quantitative polymerase chain reaction (qPCR). Results BBB permeability was maximized with 1 ml/kg contrast agent mCEUS delivered via 10-min intermittent launches with a 400-ms interval. Evans blue staining confirmed BBB permeability following ultrasonic cavitation in the control group (P < 0.05). Following temozolomide chemotherapy, levels of the tumor marker GFAP were increased in the group with ultrasonic cavitation compared with the control group (P < 0.05). Conclusions When rats were treated by mCEUS with intermittent launches (interval, 400 ms) and injected with 1 mg/kg contrast agent, BBB permeability was increased and temozolomide BBB penetration was enhanced, therapeutic enhancement for glioblastoma.
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20
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Plasma and brain pharmacokinetics of letrozole and drug interaction studies with temozolomide in NOD-scid gamma mice and sprague dawley rats. Cancer Chemother Pharmacol 2018; 83:81-89. [PMID: 30357450 DOI: 10.1007/s00280-018-3705-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 10/15/2018] [Indexed: 01/01/2023]
Abstract
PURPOSE The aromatase inhibitor, letrozole, is being investigated in experimental animal models as a novel treatment for high-grade gliomas (HGGs). To facilitate optimal dosing for such studies, we evaluated the plasma and brain pharmacokinetics (PK) of letrozole in NOD-scid gamma (NSG) mice, which are frequently employed for assessing efficacy against patient-derived tumor cells. Furthermore, we evaluated the potential PK interactions between letrozole and temozolomide (TMZ) in Sprague-Dawley rats. METHODS NSG mice were administered letrozole (8 mg/kg; i.p) as a single or multiple dose (b.i.d, 10 days). Brain tissue and blood samples were collected over 24 h. Letrozole and TMZ interaction study employed jugular vein-cannulated rats (three groups; TMZ alone, letrozole alone and TMZ + letrozole). Intracerebral microdialysis was performed for brain extracellular fluid (ECF) collection simultaneously with venous blood sampling. Drug levels were measured employing HPLC and PK analysis was conducted using Phoenix WinNonlin®. RESULTS In NSG mice, peak plasma and brain tissue letrozole concentrations (Cmax) were 3-4 and 0.8-0.9 µg/ml, respectively. The elimination half-life was 2.6 h with minimal accumulation following multiple dosing. In the drug interaction study, no PK changes were evident when TMZ and letrozole were given in combination. For instance, peak plasma and brain ECF TMZ levels when given alone were 14.7 ± 1.1 and 4.6 ± 0.6 µg/ml, respectively, and 12.6 ± 2.4 and 3.4 ± 0.8 µg/ml, respectively, when given with letrozole. CONCLUSIONS These results will guide the optimization of dosing regimen for further development of letrozole for HGG treatment.
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21
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Khosa A, Krishna KV, Saha RN, Dubey SK, Reddi S. A simplified and sensitive validated RP-HPLC method for determination of temozolomide in rat plasma and its application to a pharmacokinetic study. J LIQ CHROMATOGR R T 2018. [DOI: 10.1080/10826076.2018.1511803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Archana Khosa
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Rajasthan, India
| | | | - Ranendra N. Saha
- Department of Biotechnology, Birla Institute of Technology and Science, Dubai, UAE
| | - Sunil K. Dubey
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Rajasthan, India
| | - Satish Reddi
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Rajasthan, India
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22
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KX2-361: a novel orally bioavailable small molecule dual Src/tubulin inhibitor that provides long term survival in a murine model of glioblastoma. J Neurooncol 2018; 140:519-527. [DOI: 10.1007/s11060-018-2992-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 08/27/2018] [Indexed: 10/28/2022]
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23
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Attari Z, Kumar L, Mallikarjuna Rao C, Koteshwara KB. Reversed-Phase HPLC Method for Determination of Temozolomide in Rat Plasma and Brain: Simple, Sensitive and Robust Method. Pharm Chem J 2018. [DOI: 10.1007/s11094-018-1804-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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24
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Additional increased effects of mannitol-temozolomide combined treatment on blood-brain barrier permeability. Biochem Biophys Res Commun 2018; 497:769-775. [PMID: 29462622 DOI: 10.1016/j.bbrc.2018.02.149] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 02/17/2018] [Indexed: 12/27/2022]
Abstract
The blood-brain barrier (BBB) is major obstacle in drug or stem cell treatment in chronic stroke. We hypothesized that adding mannitol to temozolomide (TMZ) is a practically applicable method for resolving the low efficacy of intravenous mannitol therapy. In this study, we investigated whether BBB permeability could be increased by this combined treatment. First, we established a chronic ischemic stroke rat model and examined changes in leakage of Evans blue dye within a lesion site, and in expression of tight junction proteins (TJPs), by this combined treatment. Additionally, in an in vitro BBB model using trans-wells, we analyzed changes in diffusion of a fluorescent tracer and in expression of TJPs. Mannitol-TMZ combined treatment not only increased the amount of Evans blue dye within the stroke lesion site, but also reduced occludin expression in rat brain microvessels. The in vitro study also showed that combined treatment increased the permeability for two different-sized fluorescent tracers, especially large size, and decreased expression of TJPs, such as occludin and ZO-1. Increased BBB permeability effects were more prominent with combined than with single treatments. Mannitol-TMZ combined treatment induced a decrease of TJPs with a consequent increase in BBB permeability. This combined treatment is clinically useful and might provide new therapeutic options by enabling efficient intracerebral delivery of various drugs that could not otherwise be used to treat many CNS diseases due to their inability to penetrate the BBB.
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Prabhu S, Goda JS, Mutalik S, Mohanty BS, Chaudhari P, Rai S, Udupa N, Rao BSS. A polymeric temozolomide nanocomposite against orthotopic glioblastoma xenograft: tumor-specific homing directed by nestin. NANOSCALE 2017; 9:10919-10932. [PMID: 28731079 DOI: 10.1039/c7nr00305f] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The development of effective therapeutic strategies for glioblastoma faces challenges such as modulating the blood brain barrier (BBB) for drug influx and selectively targeting tumor cells. Nanocarrier drug delivery strategies are functionalized to enhance vascular permeability. We engineered superparamagnetic iron oxide nanoparticle (SPION) based polymeric nanocomposites (84.37 ± 12.37 nm / 101.56 ± 7.42 nm) embedding temozolomide (TMZ) targeted against glioblastoma by tagging an antibody against nestin, a stem cell marker, and transferrin / polysorbate-80 to permeate the BBB. The targeting and therapeutic efficacy of the nanocomposite resulted in enhanced permeability across the BBB in an orthotopic glioblastoma xenograft model. Sustained release of TMZ from the nanocomposite contributed to enhanced tumor cell death while sparing normal brain cells as evidenced through micro SPECT/CT analysis. The functionalized nanocomposites showed significant reductions in tumor volume compared to pure TMZ, as substantiated by reduced proliferation markers such as proliferating cell nuclear antigen (PCNA) and Ki-67. We report here a novel targeted TMZ delivery strategy using a potent homing moiety, nestin, tagged to a polymeric nanocomposite to target glioblastoma. In addition to tumor targeting, this study constitutes a broad horizon for enhanced therapeutic efficacy with further scope for capitalizing on the magnetic properties of SPION for targeted killing of cancer cells while sparing normal tissues.
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Affiliation(s)
- Suma Prabhu
- Department of Radiation Biology and Toxicology, School of Life Sciences, Manipal University, Manipal - 576 104, Karnataka, India.
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Dose–response relationship of temozolomide, determined by the Pig-a, comet, and micronucleus assay. Arch Toxicol 2017; 91:2443-2453. [DOI: 10.1007/s00204-016-1923-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 12/20/2016] [Indexed: 11/25/2022]
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Rai R, Banerjee M, Wong DH, McCullagh E, Gupta A, Tripathi S, Riquelme E, Jangir R, Yadav S, Raja M, Melkani P, Dixit V, Patil U, Shrivastava R, Middya S, Olivares F, Guerrero J, Surya A, Pham SM, Bernales S, Protter AA, Hung DT, Chakravarty S. Temozolomide analogs with improved brain/plasma ratios - Exploring the possibility of enhancing the therapeutic index of temozolomide. Bioorg Med Chem Lett 2016; 26:5103-5109. [PMID: 27614414 DOI: 10.1016/j.bmcl.2016.08.064] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 08/17/2016] [Accepted: 08/19/2016] [Indexed: 12/15/2022]
Abstract
Temozolomide is a chemotherapeutic agent that is used in the treatment of glioblastoma and other malignant gliomas. It acts through DNA alkylation, but treatment is limited by its systemic toxicity and neutralization of DNA alkylation by upregulation of the O6-methylguanine-DNA methyltransferase gene. Both of these limiting factors can be addressed by achieving higher concentrations of TMZ in the brain. Our research has led to the discovery of new analogs of temozolomide with improved brain:plasma ratios when dosed in vivo in rats. These compounds are imidazotetrazine analogs, expected to act through the same mechanism as temozolomide. With reduced systemic exposure, these new agents have the potential to improve efficacy and therapeutic index in the treatment of glioblastoma.
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Affiliation(s)
- Roopa Rai
- Medivation, 525 Market Street, 36th Floor, San Francisco, CA 94105, USA
| | - Monali Banerjee
- Curadev Pvt. Ltd, B-87, Sector 83, Noida, Uttar Pradesh 201305, India
| | - Darren H Wong
- Concert Pharmaceuticals, 99 Hayden Ave, Suite 500, Lexington, MA 02421, USA
| | - Emma McCullagh
- Medivation, 525 Market Street, 36th Floor, San Francisco, CA 94105, USA
| | - Ashu Gupta
- Integral BioScience Pvt. Ltd, C-64, Hosiery Complex Phase II Extension, Noida, Uttar Pradesh 201306, India
| | - Shailendra Tripathi
- Integral BioScience Pvt. Ltd, C-64, Hosiery Complex Phase II Extension, Noida, Uttar Pradesh 201306, India
| | - Eduardo Riquelme
- Fundación Ciencia y Vida, Avenida Zañartu 1482, Ñuñoa, Santiago 7780272, Chile
| | - Ramnivas Jangir
- Integral BioScience Pvt. Ltd, C-64, Hosiery Complex Phase II Extension, Noida, Uttar Pradesh 201306, India
| | - Shyamraj Yadav
- Integral BioScience Pvt. Ltd, C-64, Hosiery Complex Phase II Extension, Noida, Uttar Pradesh 201306, India
| | - Mohd Raja
- Integral BioScience Pvt. Ltd, C-64, Hosiery Complex Phase II Extension, Noida, Uttar Pradesh 201306, India
| | - Pankaj Melkani
- Integral BioScience Pvt. Ltd, C-64, Hosiery Complex Phase II Extension, Noida, Uttar Pradesh 201306, India
| | - Vikas Dixit
- Integral BioScience Pvt. Ltd, C-64, Hosiery Complex Phase II Extension, Noida, Uttar Pradesh 201306, India
| | - Umesh Patil
- Integral BioScience Pvt. Ltd, C-64, Hosiery Complex Phase II Extension, Noida, Uttar Pradesh 201306, India
| | | | - Sandip Middya
- Curadev Pvt. Ltd, B-87, Sector 83, Noida, Uttar Pradesh 201305, India
| | - Felipe Olivares
- Fundación Ciencia y Vida, Avenida Zañartu 1482, Ñuñoa, Santiago 7780272, Chile
| | - Javier Guerrero
- Fundación Ciencia y Vida, Avenida Zañartu 1482, Ñuñoa, Santiago 7780272, Chile
| | - Arjun Surya
- Curadev Pvt. Ltd, B-87, Sector 83, Noida, Uttar Pradesh 201305, India
| | - Son M Pham
- Medivation, 525 Market Street, 36th Floor, San Francisco, CA 94105, USA
| | | | - Andrew A Protter
- Medivation, 525 Market Street, 36th Floor, San Francisco, CA 94105, USA
| | - David T Hung
- Medivation, 525 Market Street, 36th Floor, San Francisco, CA 94105, USA
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Dréan A, Goldwirt L, Verreault M, Canney M, Schmitt C, Guehennec J, Delattre JY, Carpentier A, Idbaih A. Blood-brain barrier, cytotoxic chemotherapies and glioblastoma. Expert Rev Neurother 2016; 16:1285-1300. [PMID: 27310463 DOI: 10.1080/14737175.2016.1202761] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Glioblastomas (GBM) are the most common and aggressive primary malignant brain tumors in adults. The blood brain barrier (BBB) is a major limitation reducing efficacy of anti-cancer drugs in the treatment of GBM patients. Areas covered: Virtually all GBM recur after the first-line treatment, at least partly, due to invasive tumor cells protected from chemotherapeutic agents by the intact BBB in the brain adjacent to tumor. The passage through the BBB, taken by antitumor drugs, is poorly and heterogeneously documented in the literature. In this review, we have focused our attention on: (i) the BBB, (ii) the passage of chemotherapeutic agents across the BBB and (iii) the strategies investigated to overcome this barrier. Expert commentary: A better preclinical knowledge of the crossing of the BBB by antitumor drugs will allow optimizing their clinical development, alone or combined with BBB bypassing strategies, towards an increased success rate of clinical trials.
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Affiliation(s)
- Antonin Dréan
- a Inserm U 1127, CNRS UMR 7225 , Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM , Paris , France.,b Carthera SAS , Institut du Cerveau et de la Moelle épinière, ICM , Paris , France
| | - Lauriane Goldwirt
- c AP-HP , Hôpital Universitaire Saint Louis, Service de Pharmacologie , Paris , France
| | - Maïté Verreault
- a Inserm U 1127, CNRS UMR 7225 , Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM , Paris , France
| | - Michael Canney
- b Carthera SAS , Institut du Cerveau et de la Moelle épinière, ICM , Paris , France
| | - Charlotte Schmitt
- a Inserm U 1127, CNRS UMR 7225 , Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM , Paris , France
| | - Jeremy Guehennec
- a Inserm U 1127, CNRS UMR 7225 , Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM , Paris , France
| | - Jean-Yves Delattre
- a Inserm U 1127, CNRS UMR 7225 , Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM , Paris , France.,d AP-HP , Hôpital Universitaire La Pitié Salpêtrière, Service de Neurologie 2-Mazarin , Paris , France
| | - Alexandre Carpentier
- b Carthera SAS , Institut du Cerveau et de la Moelle épinière, ICM , Paris , France.,e AP-HP , Hôpital Universitaire La Pitié Salpêtrière, Service de Neurochirurgie , Paris , France
| | - Ahmed Idbaih
- a Inserm U 1127, CNRS UMR 7225 , Sorbonne Universités, UPMC Univ Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM , Paris , France.,d AP-HP , Hôpital Universitaire La Pitié Salpêtrière, Service de Neurologie 2-Mazarin , Paris , France
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Quantification of Temozolomide in Nonhuman Primate Fluids by Isocratic Ultra-High Performance Liquid Chromatography-Tandem Mass Spectrometry to Study Brain Tissue Penetration Following Intranasal or Intravenous Delivery. SEPARATIONS 2016; 3. [PMID: 33313078 DOI: 10.3390/chromatography3010004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A sensitive and selective ultra-high performance liquid chromatography-tandem mass spectrometric method was developed for the quantification of temozolomide (TMZ) in nonhuman primate (NHP) plasma, cerebrospinal fluid (CSF), and brain extracellular fluid (ECF) following microdialysis. Ethyl acetate was used to extract the plasma and CSF samples, using theophylline as the internal standard (IS). ECF samples were diluted with acetonitrile prior to analysis. TMZ was separated on a Waters UPLC® BEH C18 column with an isocratic mobile phase of ammonium acetate (10 mM)-0.1% formic acid/acetonitrile (30:70, v/v) in a positive-ion multi pie reaction monitoring mode (m/z 195.5 →137.6 for TMZ; m/z 181.5→124.2 for IS). The retention time of TMZ and theophylline was 0.45 min with a total run time of 2.5 min. The method was validated over the range from 5-2000 ng/mL in NHP plasma, CSF, and ECF with respect to linearity, accuracy, precision, selectivity, and stability. This method was successfully applied toward the measurement of pharmacokinetic samples following various routes of drug administration.
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Liu HL, Huang CY, Chen JY, Wang HYJ, Chen PY, Wei KC. Pharmacodynamic and therapeutic investigation of focused ultrasound-induced blood-brain barrier opening for enhanced temozolomide delivery in glioma treatment. PLoS One 2014; 9:e114311. [PMID: 25490097 PMCID: PMC4260869 DOI: 10.1371/journal.pone.0114311] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 11/05/2014] [Indexed: 01/13/2023] Open
Abstract
Focused ultrasound (FUS) exposure with the presence of microbubbles has been shown to transiently open the blood-brain barrier (BBB), and thus has potential to enhance the delivery of various kinds of therapeutic agents into brain tumors. The purpose of this study was to assess the preclinical therapeutic efficacy of FUS-BBB opening for enhanced temozolomide (TMZ) delivery in glioma treatment. FUS exposure with microbubbles was delivered to open the BBB of nude mice that were either normal or implanted with U87 human glioma cells. Different TMZ dose regimens were tested, ranging from 2.5 to 25 mg/kg. Plasma and brain samples were obtained at different time-points ranging from 0.5 to 4 hours, and the TMZ concentration within samples was quantitated via a developed LC-MS/MS procedure. Tumor progression was followed with T2-MRI, and animal survival and brain tissue histology were conducted. Results demonstrated that FUS-BBB opening caused the local TMZ accumulation in the brain to increase from 6.98 to 19 ng/mg. TMZ degradation time in the tumor core was found to increase from 1.02 to 1.56 hours. Improved tumor progression and animal survival were found at different TMZ doses (up to 15% and 30%, respectively). In conclusion, this study provides preclinical evidence that FUS-BBB opening increases the local concentration of TMZ to improve the control of tumor progression and animal survival, suggesting the potential for clinical application to improve current brain tumor treatment.
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Affiliation(s)
- Hao-Li Liu
- Department of Electrical Engineering, Chang-Gung University, Taoyuan, Taiwan
- Healthy Aging Research Center, Chang-Gung University, Taoyuan, Taiwan
- * E-mail: (HLL); (KCW)
| | - Chiung-Yin Huang
- Department of Neurosurgery, Chang-Gung Memorial Hospital, Linkou, Taiwan
| | - Ju-Yu Chen
- Department of Electrical Engineering, Chang-Gung University, Taoyuan, Taiwan
| | - Hay-Yan Jack Wang
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Pin-Yuan Chen
- Department of Neurosurgery, Chang-Gung Memorial Hospital, Linkou, Taiwan
| | - Kuo-Chen Wei
- Department of Neurosurgery, Chang-Gung Memorial Hospital, Linkou, Taiwan
- * E-mail: (HLL); (KCW)
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The future of glioblastoma therapy: synergism of standard of care and immunotherapy. Cancers (Basel) 2014; 6:1953-85. [PMID: 25268164 PMCID: PMC4276952 DOI: 10.3390/cancers6041953] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 08/05/2014] [Accepted: 09/03/2014] [Indexed: 12/18/2022] Open
Abstract
The current standard of care for glioblastoma (GBM) is maximal surgical resection with adjuvant radiotherapy and temozolomide (TMZ). As the 5-year survival with GBM remains at a dismal <10%, novel therapies are needed. Immunotherapies such as the dendritic cell (DC) vaccine, heat shock protein vaccines, and epidermal growth factor receptor (EGFRvIII) vaccines have shown encouraging results in clinical trials, and have demonstrated synergistic effects with conventional therapeutics resulting in ongoing phase III trials. Chemoradiation has been shown to have synergistic effects when used in combination with immunotherapy. Cytotoxic ionizing radiation is known to trigger pro-inflammatory signaling cascades and immune activation secondary to cell death, which can then be exploited by immunotherapies. The future of GBM therapeutics will involve finding the place for immunotherapy in the current treatment regimen with a focus on developing strategies. Here, we review current GBM therapy and the evidence for combination of immune checkpoint inhibitors, DC and peptide vaccines with the current standard of care.
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32
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The medicinal chemistry of imidazotetrazine prodrugs. Pharmaceuticals (Basel) 2014; 7:797-838. [PMID: 25014631 PMCID: PMC4113733 DOI: 10.3390/ph7070797] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 06/17/2014] [Accepted: 06/18/2014] [Indexed: 02/02/2023] Open
Abstract
Temozolomide (TMZ) is the standard first line treatment for malignant glioma, reaching “blockbuster” status in 2010, yet it remains the only drug in its class. The main constraints on the clinical effectiveness of TMZ therapy are its requirement for active DNA mismatch repair (MMR) proteins for activity, and inherent resistance through O6-methyl guanine-DNA methyl transferase (MGMT) activity. Moreover, acquired resistance, due to MMR mutation, results in aggressive TMZ-resistant tumour regrowth following good initial responses. Much of the attraction in TMZ as a drug lies in its PK/PD properties: it is acid stable and has 100% oral bioavailability; it also has excellent distribution properties, crosses the blood-brain barrier, and there is direct evidence of tumour localisation. This review seeks to unravel some of the mysteries of the imidazotetrazine class of compounds to which TMZ belongs. In addition to an overview of different synthetic strategies, we explore the somewhat unusual chemical reactivity of the imidazotetrazines, probing their mechanisms of reaction, examining which attributes are required for an active drug molecule and reviewing the use of this combined knowledge towards the development of new and improved anti-cancer agents.
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33
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Irinotecan and temozolomide brain distribution: a focus on ABCB1. Cancer Chemother Pharmacol 2014; 74:185-93. [PMID: 24867782 DOI: 10.1007/s00280-014-2490-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 05/13/2014] [Indexed: 01/16/2023]
Abstract
Glioblastoma (GBM), the most common primary brain tumor in adults, is usually rapidly fatal with median survival duration of only 15 months and a 3-year survival rate of <7 %. Temozolomide (TMZ) is the only anticancer drug that has improved survival in GBM when administered with concomitant radiotherapy. Irinotecan (CPT-11) has also shown efficacy in recurrent gliomas monotherapy with moderate response. As the efficacy of GBM treatments relies on their brain distribution through the blood-brain barrier (BBB), the aim of the present work was to study, on an in vivo model, the brain distribution of TMZ, CPT-11 and its active metabolite, SN-38. We have focussed on the role of ABCB1, the main efflux transporter at the BBB level, through pharmacokinetics studies in CF1 mdr1a(+/+) and mdr1a(-/-) mice. Our results show that TMZ, CPT-11 and SN-38 are transported by ABCB1 at the BBB level with brain/plasma ratios of 1.1, 2.1 and 2.3, respectively.
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St-Coeur PD, Touaibia M, Cuperlovic-Culf M, Morin P. Leveraging metabolomics to assess the next generation of temozolomide-based therapeutic approaches for glioblastomas. GENOMICS PROTEOMICS & BIOINFORMATICS 2013; 11:199-206. [PMID: 23732626 PMCID: PMC4357826 DOI: 10.1016/j.gpb.2013.04.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 03/29/2013] [Accepted: 04/13/2013] [Indexed: 01/28/2023]
Abstract
Glioblastoma multiforme (GBM) is the most common adult primary tumor of the central nervous system. The current standard of care for glioblastoma patients involves a combination of surgery, radiotherapy and chemotherapy with the alkylating agent temozolomide. Several mechanisms underlying the inherent and acquired temozolomide resistance have been identified and contribute to treatment failure. Early identification of temozolomide-resistant GBM patients and improvement of the therapeutic strategies available to treat this malignancy are of uttermost importance. This review initially looks at the molecular pathways underlying GBM formation and development with a particular emphasis placed on recent therapeutic advances made in the field. Our focus will next be directed toward the molecular mechanisms modulating temozolomide resistance in GBM patients and the strategies envisioned to circumvent this resistance. Finally, we highlight the diagnostic and prognostic value of metabolomics in cancers and assess its potential usefulness in improving the current standard of care for GBM patients.
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Wei KC, Chu PC, Wang HYJ, Huang CY, Chen PY, Tsai HC, Lu YJ, Lee PY, Tseng IC, Feng LY, Hsu PW, Yen TC, Liu HL. Focused ultrasound-induced blood-brain barrier opening to enhance temozolomide delivery for glioblastoma treatment: a preclinical study. PLoS One 2013; 8:e58995. [PMID: 23527068 PMCID: PMC3602591 DOI: 10.1371/journal.pone.0058995] [Citation(s) in RCA: 150] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 02/09/2013] [Indexed: 11/23/2022] Open
Abstract
The purpose of this study is to assess the preclinical therapeutic efficacy of magnetic resonance imaging (MRI)-monitored focused ultrasound (FUS)-induced blood-brain barrier (BBB) disruption to enhance Temozolomide (TMZ) delivery for improving Glioblastoma Multiforme (GBM) treatment. MRI-monitored FUS with microbubbles was used to transcranially disrupt the BBB in brains of Fisher rats implanted with 9L glioma cells. FUS-BBB opening was spectrophotometrically determined by leakage of dyes into the brain, and TMZ was quantitated in cerebrospinal fluid (CSF) and plasma by LC-MS\MS. The effects of treatment on tumor progression (by MRI), animal survival and brain tissue histology were investigated. Results demonstrated that FUS-BBB opening increased the local accumulation of dyes in brain parenchyma by 3.8-/2.1-fold in normal/tumor tissues. Compared to TMZ alone, combined FUS treatment increased the TMZ CSF/plasma ratio from 22.7% to 38.6%, reduced the 7-day tumor progression ratio from 24.03 to 5.06, and extended the median survival from 20 to 23 days. In conclusion, this study provided preclinical evidence that FUS BBB-opening increased the local concentration of TMZ to improve the control of tumor progression and animal survival, suggesting its clinical potential for improving current brain tumor treatment.
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Affiliation(s)
- Kuo-Chen Wei
- Department of Neurosurgery, Chang-Gung University and Memorial Hospital, Taoyuan, Taiwan
- * E-mail: (H-LL); (K-CW)
| | - Po-Chun Chu
- Department of Electrical Engineering, Chang-Gung University, Taoyuan, Taiwan
| | - Hay-Yan Jack Wang
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Chiung-Yin Huang
- Department of Neurosurgery, Chang-Gung University and Memorial Hospital, Taoyuan, Taiwan
| | - Pin-Yuan Chen
- Department of Neurosurgery, Chang-Gung University and Memorial Hospital, Taoyuan, Taiwan
| | - Hong-Chieh Tsai
- Department of Neurosurgery, Chang-Gung University and Memorial Hospital, Taoyuan, Taiwan
| | - Yu-Jen Lu
- Department of Neurosurgery, Chang-Gung University and Memorial Hospital, Taoyuan, Taiwan
| | - Pei-Yun Lee
- Department of Electrical Engineering, Chang-Gung University, Taoyuan, Taiwan
| | - I-Chou Tseng
- Department of Neurosurgery, Chang-Gung University and Memorial Hospital, Taoyuan, Taiwan
| | - Li-Ying Feng
- Department of Neurosurgery, Chang-Gung University and Memorial Hospital, Taoyuan, Taiwan
| | - Peng-Wei Hsu
- Department of Neurosurgery, Chang-Gung University and Memorial Hospital, Taoyuan, Taiwan
| | - Tzu-Chen Yen
- Department of Nuclear Medicine and Molecular Imaging Center, Chang-Gung University and Memorial Hospital, Taoyuan, Taiwan
| | - Hao-Li Liu
- Department of Electrical Engineering, Chang-Gung University, Taoyuan, Taiwan
- Healthy Aging Research Center, Chang-Gung University, Taoyuan, Taiwan
- * E-mail: (H-LL); (K-CW)
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Goldwirt L, Zahr N, Farinotti R, Fernandez C. Development of a new UPLC-MSMS method for the determination of temozolomide in mice: application to plasma pharmacokinetics and brain distribution study. Biomed Chromatogr 2013; 27:889-93. [PMID: 23436249 DOI: 10.1002/bmc.2877] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 01/10/2013] [Accepted: 01/17/2013] [Indexed: 11/10/2022]
Abstract
A sensitive and accurate liquid chromatography method with mass spectrometry detection was developed and validated for the quantification of temozolomide in mouse plasma and brain. Theophyllin was used as the internal standard. A single-step protein precipitation was used for plasma and brain sample preparation. The method was validated with respect to selectivity, extraction recovery, linearity, intra- and inter-day precision and accuracy, limit of quantification and stability. The method has a limit of quantification of 50 ng/mL for temozolomide in plasma and 125 ng/g in brain. This method was used successfully to perform brain and plasma pharmacokinetic studies of temozolomide in mice after intraperitoneal administration.
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Affiliation(s)
- Lauriane Goldwirt
- Clinical Pharmacy Department - EA 4123, College of Pharmacy, Paris 11 University, 5 rue Jean Baptiste Clement, 92296, Chatenay Malabry, France.
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Nagasawa DT, Chow F, Yew A, Kim W, Cremer N, Yang I. Temozolomide and other potential agents for the treatment of glioblastoma multiforme. Neurosurg Clin N Am 2012; 23:307-22, ix. [PMID: 22440874 DOI: 10.1016/j.nec.2012.01.007] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This article provides historical and recent perspectives related to the use of temozolomide for the treatment of glioblastoma multiforme. Temozolomide has quickly become part of the standard of care for the modern treatment of stage IV glioblastoma multiforme since its approval in 2005. Yet despite its improvements from previous therapies, median survival remains approximately 15 months, with a 2-year survival rate of 8% to 26%. The mechanism of action of this chemotherapeutic agent, conferred advantages and limitations, treatment resistance and rescue, and potential targets of future research are discussed.
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Affiliation(s)
- Daniel T Nagasawa
- UCLA Department of Neurosurgery, University of California Los Angeles, David Geffen School of Medicine at UCLA, 695 Charles East Young Drive South, UCLA Gonda 3357, Los Angeles, CA 90095-1761, USA
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38
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Analysis of anticancer drugs: a review. Talanta 2011; 85:2265-89. [PMID: 21962644 DOI: 10.1016/j.talanta.2011.08.034] [Citation(s) in RCA: 316] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 08/15/2011] [Accepted: 08/16/2011] [Indexed: 01/05/2023]
Abstract
In the last decades, the number of patients receiving chemotherapy has considerably increased. Given the toxicity of cytotoxic agents to humans (not only for patients but also for healthcare professionals), the development of reliable analytical methods to analyse these compounds became necessary. From the discovery of new substances to patient administration, all pharmaceutical fields are concerned with the analysis of cytotoxic drugs. In this review, the use of methods to analyse cytotoxic agents in various matrices, such as pharmaceutical formulations and biological and environmental samples, is discussed. Thus, an overview of reported analytical methods for the determination of the most commonly used anticancer drugs is given.
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Tian XH, Lin XN, Wei F, Feng W, Huang ZC, Wang P, Ren L, Diao Y. Enhanced brain targeting of temozolomide in polysorbate-80 coated polybutylcyanoacrylate nanoparticles. Int J Nanomedicine 2011; 6:445-52. [PMID: 21445277 PMCID: PMC3061435 DOI: 10.2147/ijn.s16570] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Polybutylcyanoacrylate (PBCA) nanoparticles coated with polysorbate-80 have been extensively proposed for delivering drugs into the animal brain and have shown great potential for therapeutic applications. In this study, we made an attempt to deliver the chemotherapeutic drug, temozolomide, into the brain by using PBCA nanoparticles. The physicochemical characteristics, in vitro release, and brain targeting ability of the drug-loaded nanoparticles were investigated. RESULTS Our results show that a significantly higher concentration of temozolomide in the form of polysorbate-80-coated PBCA nanoparticles was observed in the brain (P < 0.05) in comparison with the free drug. CONCLUSION This study indicates that polysorbate-80 coated PBCA nanoparticles could be a feasible carrier for temozolomide delivery to the brain. It is anticipated that the developed formulation may improve on targeted therapy for malignant brain tumors in the future.
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Affiliation(s)
- Xin-Hua Tian
- Department of Neurosurgery, Zhongshan Hospital of Xiamen University, Xiamen, People's Republic of China
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Diez BD, Statkevich P, Zhu Y, Abutarif MA, Xuan F, Kantesaria B, Cutler D, Cantillon M, Schwarz M, Pallotta MG, Ottaviano FH. Evaluation of the exposure equivalence of oral versus intravenous temozolomide. Cancer Chemother Pharmacol 2009; 65:727-34. [PMID: 19641919 PMCID: PMC2808524 DOI: 10.1007/s00280-009-1078-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2009] [Accepted: 07/08/2009] [Indexed: 01/05/2023]
Abstract
Purpose Oral temozolomide is approved in many countries for malignant glioma and for melanoma in some countries outside the USA. This study evaluated the exposure equivalence and safety of temozolomide by intravenous infusion and oral administration. Methods Subjects with primary central nervous system malignancies (excluding central nervous system lymphoma) received 200 mg/m2 of oral temozolomide on days 1, 2 and 5. On days 3 and 4, subjects received 150 mg/m2 temozolomide either as a 90-min intravenous infusion on one day or by oral administration on an alternate day. Results Ratio of log-transformed means (intravenous:oral) of area under the concentration–time curve and maximum concentration of drug after dosing for temozolomide and 5-(3-methyltriazen-1-yl)imidazole-4-carboxamide (MTIC) met exposure equivalence criteria (90% confidence interval = 0.8–1.25). Treatment-emergent adverse events were consistent with those reported previously in subjects with recurrent glioma treated with oral temozolomide, except for mostly mild and transient injection site reactions with intravenous administration. Conclusions This study demonstrated an exposure equivalence of a 90-min intravenous infusion of temozolomide and an equivalent oral dose.
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Affiliation(s)
- Blanca D Diez
- Department of Neuro-Oncology, Institute of Neurological Research Dr Raul Carrea (FLENI), Montañeses 2325, Buenos Aires 1428, Argentina.
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Akbar U, Jones T, Winestone J, Michael M, Shukla A, Sun Y, Duntsch C. Delivery of temozolomide to the tumor bed via biodegradable gel matrices in a novel model of intracranial glioma with resection. J Neurooncol 2009; 94:203-12. [PMID: 19337695 DOI: 10.1007/s11060-009-9857-9] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2008] [Accepted: 03/16/2009] [Indexed: 11/24/2022]
Abstract
INTRODUCTION We have completed in vivo safety and efficacy studies of the use of a novel drug delivery system, a gel matrix-temozolomide formulation that is injected intracranially into the post-resection cavity, as a candidate for glioma therapy. METHODS A rat intracranial resection model of C6-GFP intracranial glioma was used for safety and toxicity studies. Biodistribution studies were performed using gel matrix-gallocyanine formulations and were evaluated at various time intervals using real-time analysis of dye distribution. Additionally, the resection model was used to determine the efficacy of gel matrix-temozolomide as compared to blank gel matrix. A subcutaneous human xenograft glioma model was used to further assess the efficacy of gel matrix-temozolomide in reducing the overall tumor load. RESULTS Gel matrix-temozolomide exhibited minimal cytotoxicity toward normal brain tissue while displaying high levels of oncolytic activity toward glioma cells. In the intracranial glioma resection and subcutaneous glioma model, administration of gel matrix-temozolomide directly to the tumor bed was well tolerated and effective at reducing the tumor load. A significant reduction of tumor load was observed (P < 0.0001) in the 30% temozolomide group (approximately 95%) as compared to blank control. There was little morbidity and no mortality associated with gel matrix treatment. CONCLUSIONS Gel matrix-temozolomide appears to be safe and effective when used in vivo to treat intracranial glioma and warrants further development as a potential adjuvant therapy.
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Affiliation(s)
- Umar Akbar
- Department of Neurosurgery, The University of Tennessee Health Science Center, 847 Monroe Avenue, Suite 427, Memphis, TN 38163, USA
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KODAWARA T, MIZUNO T, TAUE H, HASHIDA T, YANO I, KATSURA T, INUI KI. Evaluation of Stability of Temozolomide in Solutions after Opening the Capsule. YAKUGAKU ZASSHI 2009; 129:353-7. [DOI: 10.1248/yakushi.129.353] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Takaaki KODAWARA
- Department of Pharmacy, Kyoto University Hospital, Faculty of Medicine, Kyoto University
| | - Tomoyuki MIZUNO
- Department of Pharmacy, Kyoto University Hospital, Faculty of Medicine, Kyoto University
| | - Hiromi TAUE
- Department of Pharmacy, Kyoto University Hospital, Faculty of Medicine, Kyoto University
| | - Tohru HASHIDA
- Department of Pharmacy, Kyoto University Hospital, Faculty of Medicine, Kyoto University
| | - Ikuko YANO
- Department of Pharmacy, Kyoto University Hospital, Faculty of Medicine, Kyoto University
| | - Toshiya KATSURA
- Department of Pharmacy, Kyoto University Hospital, Faculty of Medicine, Kyoto University
| | - Ken-ichi INUI
- Department of Pharmacy, Kyoto University Hospital, Faculty of Medicine, Kyoto University
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Régnard P, Bräuer-Krisch E, Troprès I, Keyriläinen J, Bravin A, Le Duc G. Enhancement of survival of 9L gliosarcoma bearing rats following intracerebral delivery of drugs in combination with microbeam radiation therapy. Eur J Radiol 2008; 68:S151-5. [DOI: 10.1016/j.ejrad.2008.04.049] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Accepted: 04/28/2008] [Indexed: 11/28/2022]
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Struwe M, Greulich KO, Junker U, Jean C, Zimmer D, Suter W, Plappert-Helbig U. Detection of photogenotoxicity in skin and eye in rat with the photo comet assay. Photochem Photobiol Sci 2008; 7:240-9. [DOI: 10.1039/b715756h] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Motl S, Zhuang Y, Waters CM, Stewart CF. Pharmacokinetic considerations in the treatment of CNS tumours. Clin Pharmacokinet 2007; 45:871-903. [PMID: 16928151 DOI: 10.2165/00003088-200645090-00002] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Despite aggressive therapy, the majority of primary and metastatic brain tumour patients have a poor prognosis with brief survival periods. This is because of the different pharmacokinetic parameters of systemically administered chemotherapeutic agents between the brain and the rest of the body. Specifically, before systemically administered drugs can distribute into the CNS, they must cross two membrane barriers, the blood-brain barrier (BBB) and blood-cerebrospinal fluid (CSF) barrier (BCB). To some extent, these structures function to exclude xenobiotics, such as anticancer drugs, from the brain. An understanding of these unique barriers is essential to predict when and how systemically administered drugs will be transported to the brain. Specifically, factors such as physiological variables (e.g. blood flow), physicochemical properties of the drug (e.g. molecular weight), as well as influx and efflux transporter expression at the BBB and BCB (e.g. adenosine triphosphate-binding cassette transporters) determine what compounds reach the CNS. A large body of preclinical and clinical research exists regarding brain penetration of anticancer agents. In most cases, a surrogate endpoint (i.e. CSF to plasma area under the concentration-time curve [AUC] ratio) is used to describe how effectively agents can be transported into the CNS. Some agents, such as the topoisomerase I inhibitor, topotecan, have high CSF to plasma AUC ratios, making them valid therapeutic options for primary and metastatic brain tumours. In contrast, other agents like the oral tyrosine kinase inhibitor, imatinib, have a low CSF to plasma AUC ratio. Knowledge of these data can have important clinical implications. For example, it is now known that chronic myelogenous leukaemia patients treated with imatinib might need additional CNS prophylaxis. Since most anticancer agents have limited brain penetration, new pharmacological approaches are needed to enhance delivery into the brain. BBB disruption, regional administration of chemotherapy and transporter modulation are all currently being evaluated in an effort to improve therapeutic outcomes. Additionally, since many chemotherapeutic agents are metabolised by the cytochrome P450 3A enzyme system, minimising drug interactions by avoiding concomitant drug therapies that are also metabolised through this system may potentially enhance outcomes. Specifically, the use of non-enzyme-inducing antiepileptic drugs and curtailing nonessential corticosteroid use may have an impact.
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Affiliation(s)
- Susannah Motl
- Department of Clinical Pharmacy, University of Tennessee Health Science Center, Memphis, TN, USA
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Abstract
Nearly 12.5 million new cancer cases are diagnosed worldwide each year. Although new treatments have been developed, most new anticancer drugs that are effective outside the brain have failed in clinical trials against brain tumours, in part due to poor penetration across the blood-brain barrier and the blood-brain tumour barrier. This review will discuss the challenges of drug delivery across the blood-brain barrier/blood-brain tumour barrier to cancer cells, as well as progress made so far. This will include a biochemical modulation strategy that transiently opens the barrier to increase anticancer drug delivery selectively to brain tumours. It will also briefly discuss a quantitative non-invasive method to measure permeability changes and tumour response to treatment in the human brain.
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Affiliation(s)
- Nagendra S Ningaraj
- Curtis and Elizabeth Anderson Cancer Institute, Memorial Health University Medial Center, 4700 Waters Avenue, Savannah, GA 31403, USA.
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