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Orozco-Aguilar J, Tacchi F, Aguirre F, Valero-Breton M, Castro-Sepulveda M, Simon F, Cabello-Verrugio C. Ursodeoxycholic acid induces sarcopenia associated with decreased protein synthesis and autophagic flux. Biol Res 2023; 56:28. [PMID: 37237400 DOI: 10.1186/s40659-023-00431-8] [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: 02/01/2023] [Accepted: 04/13/2023] [Indexed: 05/28/2023] Open
Abstract
BACKGROUND Skeletal muscle generates force and movements and maintains posture. Under pathological conditions, muscle fibers suffer an imbalance in protein synthesis/degradation. This event causes muscle mass loss and decreased strength and muscle function, a syndrome known as sarcopenia. Recently, our laboratory described secondary sarcopenia in a chronic cholestatic liver disease (CCLD) mouse model. Interestingly, the administration of ursodeoxycholic acid (UDCA), a hydrophilic bile acid, is an effective therapy for cholestatic hepatic alterations. However, the effect of UDCA on skeletal muscle mass and functionality has never been evaluated, nor the possible involved mechanisms. METHODS We assessed the ability of UDCA to generate sarcopenia in C57BL6 mice and develop a sarcopenic-like phenotype in C2C12 myotubes and isolated muscle fibers. In mice, we measured muscle strength by a grip strength test, muscle mass by bioimpedance and mass for specific muscles, and physical function by a treadmill test. We also detected the fiber's diameter and content of sarcomeric proteins. In C2C12 myotubes and/or isolated muscle fibers, we determined the diameter and troponin I level to validate the cellular effect. Moreover, to evaluate possible mechanisms, we detected puromycin incorporation, p70S6K, and 4EBP1 to evaluate protein synthesis and ULK1, LC3 I, and II protein levels to determine autophagic flux. The mitophagosome-like structures were detected by transmission electron microscopy. RESULTS UDCA induced sarcopenia in healthy mice, evidenced by decreased strength, muscle mass, and physical function, with a decline in the fiber's diameter and the troponin I protein levels. In the C2C12 myotubes, we observed that UDCA caused a reduction in the diameter and content of MHC, troponin I, puromycin incorporation, and phosphorylated forms of p70S6K and 4EBP1. Further, we detected increased levels of phosphorylated ULK1, the LC3II/LC3I ratio, and the number of mitophagosome-like structures. These data suggest that UDCA induces a sarcopenic-like phenotype with decreased protein synthesis and autophagic flux. CONCLUSIONS Our results indicate that UDCA induces sarcopenia in mice and sarcopenic-like features in C2C12 myotubes and/or isolated muscle fibers concomitantly with decreased protein synthesis and alterations in autophagic flux.
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Affiliation(s)
- Josué Orozco-Aguilar
- Laboratory of Muscle Pathology, Fragility and Aging, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
- Millennium Institute On Immunology and Immunotherapy, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
- Facultad de Farmacia, Universidad de Costa Rica, San José, Costa Rica
| | - Franco Tacchi
- Laboratory of Muscle Pathology, Fragility and Aging, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
- Millennium Institute On Immunology and Immunotherapy, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
| | - Francisco Aguirre
- Laboratory of Muscle Pathology, Fragility and Aging, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
- Millennium Institute On Immunology and Immunotherapy, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
| | - Mayalen Valero-Breton
- Laboratory of Muscle Pathology, Fragility and Aging, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
- Millennium Institute On Immunology and Immunotherapy, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
| | - Mauricio Castro-Sepulveda
- Exercise Physiology and Metabolism Laboratory, School of Kinesiology, Faculty of Medicine, Finis Terrae University, Santiago, Chile
| | - Felipe Simon
- Millennium Institute On Immunology and Immunotherapy, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile.
- Laboratory of Integrative Physiopathology, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile.
- Millennium Nucleus of Ion Channel-Associated Diseases (MiNICAD), Universidad de Chile, Santiago, Chile.
| | - Claudio Cabello-Verrugio
- Laboratory of Muscle Pathology, Fragility and Aging, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile.
- Millennium Institute On Immunology and Immunotherapy, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile.
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Ng MJ, Kong BH, Teoh KH, Yap YHY, Ng ST, Tan CS, Mohamad Razif MF, Fung SY. In vivo anti-tumor activity of Lignosus rhinocerus TM02® using a MCF7-xenograft NCr nude mice model. JOURNAL OF ETHNOPHARMACOLOGY 2023; 304:115957. [PMID: 36509254 DOI: 10.1016/j.jep.2022.115957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/07/2022] [Accepted: 11/18/2022] [Indexed: 06/17/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Lignosus rhinocerus (Cooke) Ryvarden (also known as Tiger Milk mushroom, TMM), is a basidiomycete belonging to the Polyporaceae family. It has been documented to be used by traditional Chinese physicians and indigenous people in Southeast Asia to treat a variety of illnesses, such as gastritis, arthritis, and respiratory conditions, as well as to restore patients' physical well-being. TMM has also been used in folk medicine to treat cancer. For example, people from the indigenous Kensiu tribe of northeast Kedah (Malaysia) apply shredded TMM sclerotium mixed with water directly onto breast skin to treat breast cancer, while Chinese practitioners from Hong Kong, China prescribe TMM sclerotium as a treatment for liver cancer. L. rhinocerus has previously been demonstrated to possess selective anti-proliferative properties in vitro, however pre-clinical in vivo research has not yet been conducted. AIM OF STUDY This study aimed to examine the anti-tumor activities of L. rhinocerus TM02®, using two different sample preparations [cold water extract (CWE) and fraction] via various routes of administration (oral and intraperitoneal) on an MCF7-xenograft nude mouse model. This study also investigated the inhibitory effect of TM02® CWE and its fractions against COX-2 in vitro using LPS-induced RAW264.7 macrophages, on the basis of the relationship between COX-2 and metastasis, apoptosis resistance, as well as the proliferation of cancer cells. MATERIALS AND METHODS The first preparation, L. rhinocerus TM02® sclerotium powder (TSP) was dissolved in cold water to obtain the cold water extract (CWE). It was further fractionated based on its molecular weight to obtain the high (HMW), medium (MMW) and low (LMW) molecular weight fractions. The second preparation, known as the TM02® rhinoprolycan fraction (TRF), was obtained by combining the HMW and MMW fractions. TSP was given orally to mimic the daily consumption of a supplement; TRF was administered intraperitoneally to mimic typical tumorous cancer treatment with a rapid and more thorough absorption through the peritoneal cavity. Another experiment was conducted to examine changes in COX-2 activity in LPS-induced RAW264.7 macrophages after a 1-h pre-treatment with CWE, HMW, and MMW. RESULTS Our results revealed that intraperitoneal TRF-injection (90 μg/g BW) for 20 days reduced initial tumor volume by ∼64.3% (n = 5). The percentage of apoptotic cells was marginally higher in TRF-treated mice vs. control, suggesting that induction of apoptosis as one of the factors that led to tumor shrinkage. TSP (500 μg/g BW) oral treatment (n = 5) for 63 days (inclusive of pre-treatment prior to tumor inoculation) effectively inhibited tumor growth. Four of the five tumors totally regressed, demonstrating the effectiveness of TSP ingestion in suppressing tumor growth. Although no significant changes were found in mouse serum cytokines (TNF-α, IL-5, IL-6 and CCL2), some increasing and decreasing trends were observed. This may suggest the immunomodulatory potential of these treatments that can directly or indirectly affect tumor growth. Pre-treatment with CWE, HMW and MMW significantly reduced COX-2 activity in RAW264.7 macrophages upon 24 h LPS-stimulation, suggesting the potential of L. rhinocerus TM02® extract and fractions in regulating M1/M2 polarization. CONCLUSION Based on the findings of our investigation, both the rhinoprolycan fraction and crude sclerotial powder from L. rhinocerus TM02® demonstrated tumor suppressive effects, indicating that they contain substances with strong anticancer potential. The antitumor effects of L. rhinocerus TM02® in our study highlights the potential for further explorations into its mechanism of action and future development as a prophylactic or adjunct therapeutic against tumorous cancer.
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Affiliation(s)
- Min Jia Ng
- Medicinal Mushroom Research Group (MMRG), Department of Molecular Medicine, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Boon Hong Kong
- Medicinal Mushroom Research Group (MMRG), Department of Molecular Medicine, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; Centre of Excellence for Research in AIDS (CERiA), Department of Medicine, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Kean Hooi Teoh
- Department of Pathology, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; Department of Laboratory, Sunway Medical Center, Bandar Sunway, 47500, Petaling Jaya, Selangor, Malaysia
| | - Yeannie Hui-Yeng Yap
- Department of Oral Biology and Biomedical Sciences, Faculty of Dentistry, MAHSA University, Bandar Saujana Putra, 42610, Jenjarom, Selangor, Malaysia
| | - Szu Ting Ng
- LiGNO Biotech Sdn. Bhd, 43300, Balakong Jaya, Selangor, Malaysia
| | - Chon Seng Tan
- LiGNO Biotech Sdn. Bhd, 43300, Balakong Jaya, Selangor, Malaysia
| | - Muhammad Fazril Mohamad Razif
- Medicinal Mushroom Research Group (MMRG), Department of Molecular Medicine, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Shin Yee Fung
- Medicinal Mushroom Research Group (MMRG), Department of Molecular Medicine, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; Center for Natural Products Research and Drug Discovery (CENAR), Universiti Malaya, 50603, Kuala Lumpur, Malaysia; University of Malaya Centre for Proteomics Research (UMCPR), Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
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Povydysh MN, Titova MV, Ivkin DY, Krasnova MV, Vasilevskaya ER, Fedulova LV, Ivanov IM, Klushin AG, Popova EV, Nosov AM. The Hypoglycemic and Hypocholesterolemic Activity of Dioscorea deltoidea, Tribulus terrestris and Panax japonicus Cell Culture Biomass in Rats with High-Fat Diet-Induced Obesity. Nutrients 2023; 15:nu15030656. [PMID: 36771371 PMCID: PMC9918901 DOI: 10.3390/nu15030656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/21/2023] [Accepted: 01/22/2023] [Indexed: 01/31/2023] Open
Abstract
Obesity, and its consequences for human health, is a huge and complicated problem that has no simple solution. The constant search for natural and safe compounds with systemic action that can be used for obesity prophylactics and treatment is hampered by the limited availability and variable quality of biomass of wild medicinal plants. Plant cell biotechnology is an alternative approach for the sustainable production of vegetative biomass or individual phytochemicals with high therapeutic potential. In this study, the suspension cell biomass of the medicinal plants, Dioscorea deltoidea Wall., Tribulus terrestris L., and Panax japonicus (T. Nees) C.A. Mey, produced in 20 L and 630 L bioreactors, were tested for therapeutic effects in rat models with alimentary-induced obesity. Three-month intake of water infusions of dry cell biomass (100 mg/g body weight) against the background of a hypercaloric diet reduced weight gain and the proportion of fat mass in the obese animals. In addition, cell biomass preparation reduced the intracellular dehydration and balanced the amounts of intra- and extracellular fluids in the body as determined by bioimpedance spectroscopy. A significant decrease in the glucose and cholesterol levels in the blood was also observed as a result of cell biomass administration for all species. Hypocholesterolemic activity reduced in the line P. japonicus > D. deltoidea > T. terrestris/liraglutide > intact group > control group. By the sum of parameters tested, the cell culture of D. deltoidea was considered the most effective in mitigating diet-induced obesity, with positive effects sometimes exceeding those of the reference drug liraglutide. A safety assessment of D. deltoidea cell phytopreparation showed no toxic effect on the reproductive function of the animals and their offspring. These results support the potential application of the biotechnologically produced cell biomass of medicinal plant species as safe and effective natural remedies for the treatment of obesity and related complications, particularly for the long-term treatment and during pregnancy and lactation periods when conventional treatment is often contraindicated.
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Affiliation(s)
- Maria N. Povydysh
- Saint-Petersburg State Chemical Pharmaceutical University, Prof. Popov str. 14, Saint-Petersburg 197376, Russia
- Correspondence: (M.N.P.); (M.V.T.)
| | - Maria V. Titova
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya str. 35, Moscow 127276, Russia
- Correspondence: (M.N.P.); (M.V.T.)
| | - Dmitry Yu. Ivkin
- Saint-Petersburg State Chemical Pharmaceutical University, Prof. Popov str. 14, Saint-Petersburg 197376, Russia
| | - Marina V. Krasnova
- Saint-Petersburg State Chemical Pharmaceutical University, Prof. Popov str. 14, Saint-Petersburg 197376, Russia
| | - Ekaterina R. Vasilevskaya
- V.M. Gorbatov Federal Research Center for Food Systems of Russian Academy of Sciences, Moscow 109316, Russia
| | - Liliya V. Fedulova
- V.M. Gorbatov Federal Research Center for Food Systems of Russian Academy of Sciences, Moscow 109316, Russia
| | - Igor M. Ivanov
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya str. 35, Moscow 127276, Russia
| | - Andrey G. Klushin
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya str. 35, Moscow 127276, Russia
| | - Elena V. Popova
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya str. 35, Moscow 127276, Russia
| | - Alexander M. Nosov
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya str. 35, Moscow 127276, Russia
- Faculty of Biology, Lomonosov Moscow State University, Leninskie Gory 1-12, Moscow 119991, Russia
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Mullins TP, Schock-Kusch D, Gallo LA. Transdermal Measurement of Glomerular Filtration Rate in Preclinical Research. Methods Mol Biol 2023; 2664:309-315. [PMID: 37423996 DOI: 10.1007/978-1-0716-3179-9_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
The measurement of glomerular filtration rate (GFR) is essential to understanding renal physiology, including the monitoring of disease progression and treatment effectiveness. Transdermal measurement of glomerular filtration rate (tGFR) using a miniaturized fluorescence monitor in combination with a fluorescent exogenous GFR tracer has become a common technique to measure GFR in the preclinical setting, especially in rodent models. It allows for close to real-time measurement of GFR in conscious unrestrained animals and overcomes several limitations of other GFR measures. Its widespread use is reflected by published research articles and conference abstracts from different research fields, including in the assessment of new and existing kidney therapeutics, evaluation of nephrotoxicity, screening of novel chemical or medical agents, and fundamental understanding of kidney function.
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Affiliation(s)
- Thomas P Mullins
- School of Biomedical Sciences, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Daniel Schock-Kusch
- Institute of Process Control and Innovative Energy Conversion, Mannheim University of Applied Sciences, Mannheim, Germany
| | - Linda A Gallo
- School of Biomedical Sciences, The University of Queensland, St Lucia, Brisbane, QLD, Australia.
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5
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Arulraj T, Binder SC, Meyer-Hermann M. Antibody Mediated Intercommunication of Germinal Centers. Cells 2022; 11:cells11223680. [PMID: 36429109 PMCID: PMC9688628 DOI: 10.3390/cells11223680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 10/25/2022] [Accepted: 11/15/2022] [Indexed: 11/22/2022] Open
Abstract
Antibody diversification and selection of B cells occur in dynamic structures called germinal centers (GCs). Passively administered soluble antibodies regulate the GC response by masking the antigen displayed on follicular dendritic cells (FDCs). This suggests that GCs might intercommunicate via naturally produced soluble antibodies, but the role of such GC-GC interactions is unknown. In this study, we performed in silico simulations of interacting GCs and predicted that intense interactions by soluble antibodies limit the magnitude and lifetime of GC responses. With asynchronous GC onset, we observed a higher inhibition of late formed GCs compared to early ones. We also predicted that GC-GC interactions can lead to a bias in the epitope recognition even in the presence of equally dominant epitopes due to differences in founder cell composition or initiation timing of GCs. We show that there exists an optimal range for GC-GC interaction strength that facilitates the affinity maturation towards an incoming antigenic variant during an ongoing GC reaction. These findings suggest that GC-GC interactions might be a contributing factor to the unexplained variability seen among individual GCs and a critical factor in the modulation of GC response to antigenic variants during viral infections.
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Affiliation(s)
- Theinmozhi Arulraj
- Department of Systems Immunology, Braunschweig Integrated Centre of Systems Biology, Helmholtz Centre for Infection Research, 38106 Braunschweig, Germany
| | - Sebastian C. Binder
- Department of Systems Immunology, Braunschweig Integrated Centre of Systems Biology, Helmholtz Centre for Infection Research, 38106 Braunschweig, Germany
| | - Michael Meyer-Hermann
- Department of Systems Immunology, Braunschweig Integrated Centre of Systems Biology, Helmholtz Centre for Infection Research, 38106 Braunschweig, Germany
- Institute for Biochemistry, Biotechnology and Bioinformatics, Technische Universität Braunschweig, 38106 Braunschweig, Germany
- Correspondence:
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Bagheri M, van Nostrum CF, Kok RJ, Storm G, Hennink WE, Heger M. Utility of Intravenous Curcumin Nanodelivery Systems for Improving In Vivo Pharmacokinetics and Anticancer Pharmacodynamics. Mol Pharm 2022; 19:3057-3074. [PMID: 35973068 PMCID: PMC9450039 DOI: 10.1021/acs.molpharmaceut.2c00455] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Curcumin nanoformulations for intravenous injection have
been developed
to offset poor absorption, biotransformation, degradation, and excessive
clearance associated with parenteral delivery. This review investigates
(1) whether intravenous nanoformulations improve curcumin pharmacokinetics
(PK) and (2) whether improved PK yields greater therapeutic efficacy.
Standard PK parameters (measured maximum concentration [Cmax], area under the curve [AUC], distribution volume
[Vd], and clearance [CL]) of intravenously
administered free curcumin in mice and rats were sourced from literature
and compared to curcumin formulated in nanoparticles, micelles, and
liposomes. The studies that also featured analysis of pharmacodynamics
(PD) in murine cancer models were used to determine whether improved
PK of nanoencapsulated curcumin resulted in improved PD. The distribution
and clearance of free and nanoformulated curcumin were very fast,
typically accounting for >80% curcumin elimination from plasma
within
60 min. Case-matched analysis demonstrated that curcumin nanoencapsulation
generally improved curcumin PK in terms of measured Cmax (n = 27) and AUC (n = 33), and to a lesser extent Vd and
CL. However, when the data were unpaired and clustered for comparative
analysis, only 5 out of the 12 analyzed nanoformulations maintained
a higher relative curcumin concentration in plasma over time compared
to free curcumin. Quantitative analysis of the mean plasma concentration
of free curcumin versus nanoformulated curcumin did not reveal an
overall marked improvement in curcumin PK. No correlation was found
between PK and PD, suggesting that augmentation of the systemic presence
of curcumin does not necessarily lead to greater therapeutic efficacy.
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Affiliation(s)
- Mahsa Bagheri
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Cornelus F van Nostrum
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Robbert Jan Kok
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Gert Storm
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Wim E Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Michal Heger
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands.,Jiaxing Key Laboratory for Photonanomedicine and Experimental Therapeutics, Department of Pharmaceutics, College of Medicine, Jiaxing University, Jiaxing, Zhejiang 314001, PR China
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Merten H, Brandl F, Zimmermann M, Schaefer JV, Irpinio L, Sand KMK, Nilsen J, Andersen JT, Zangemeister-Wittke U, Plückthun A. Half-life extension of efficiently produced DARPin serum albumin fusions as a function of FcRn affinity and recycling. Eur J Pharm Biopharm 2021; 167:104-113. [PMID: 34303832 DOI: 10.1016/j.ejpb.2021.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 07/14/2021] [Accepted: 07/19/2021] [Indexed: 11/18/2022]
Abstract
Serum albumin shows slow clearance from circulation due to neonatal Fc receptor (FcRn)-mediated recycling and has been used for half-life extension. We report here fusions to a high-affinity DARPin, binding to Epithelial Cell Adhesion Molecule (EpCAM). We developed a novel, efficient expression system for such fusion proteins in Pichia pastoris with titers above 300 mg/L of lab-scale shake-flask culture. Since human serum albumin (HSA) does not bind to the murine FcRn, half-lives of therapeutic candidates are frequently measured in human FcRn transgenic mice, limiting useable tumor models. Additionally, serum albumins with extended half-life have been designed. We tested HSA7, motivated by its previously claimed extraordinarily long half-life in mice, which we could not confirm. Instead, we determined a half-life of only 29 h for HSA7, comparable to MSA. The fusion of HSA7 to a DARPin showed a similar half-life. To rationalize these findings, we measured binding kinetics and affinities to murine and human FcRn. Briefly, HSA7 showed affinity to murine FcRn only in the micromolar range, comparable to MSA to its cognate murine FcRn, and an affinity in the nanomolar range only to the human FcRn. This explains the comparable half-life of MSA and HSA7 in mice, while wild-type-HSA has a half-life of only 21 h, as it does not bind the murine FcRn and is not recycled. Thus, HSA-fusions with improved FcRn-affinity, such as HSA7, can be used for preclinical experiments in mice when FcRn transgenes cannot be used, as they reflect better the complex FcRn-mediated recycling and distribution mechanisms.
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Affiliation(s)
- Hannes Merten
- Department of Biochemistry, University of Zurich, 8057 Zurich, Switzerland
| | - Fabian Brandl
- Department of Biochemistry, University of Zurich, 8057 Zurich, Switzerland; Institute of Pharmacology, University of Bern, Inselspital INO-F, 3010 Bern, Switzerland
| | - Martina Zimmermann
- Department of Biochemistry, University of Zurich, 8057 Zurich, Switzerland
| | - Jonas V Schaefer
- Department of Biochemistry, University of Zurich, 8057 Zurich, Switzerland
| | - Linda Irpinio
- Department of Biochemistry, University of Zurich, 8057 Zurich, Switzerland
| | - Kine M K Sand
- Department of Immunology, University of Oslo and Oslo University Hospital Rikshospitalet, N-0372 Oslo, Norway; Institute of Clinical Medicine, Department of Pharmacology, University of Oslo, N-0318 Oslo, Norway
| | - Jeannette Nilsen
- Department of Immunology, University of Oslo and Oslo University Hospital Rikshospitalet, N-0372 Oslo, Norway; Institute of Clinical Medicine, Department of Pharmacology, University of Oslo, N-0318 Oslo, Norway
| | - Jan Terje Andersen
- Department of Immunology, University of Oslo and Oslo University Hospital Rikshospitalet, N-0372 Oslo, Norway; Institute of Clinical Medicine, Department of Pharmacology, University of Oslo, N-0318 Oslo, Norway
| | - Uwe Zangemeister-Wittke
- Department of Biochemistry, University of Zurich, 8057 Zurich, Switzerland; Institute of Pharmacology, University of Bern, Inselspital INO-F, 3010 Bern, Switzerland.
| | - Andreas Plückthun
- Department of Biochemistry, University of Zurich, 8057 Zurich, Switzerland.
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Segar JL, Grobe CC, Balapattabi K, Ritter ML, Reho JJ, Grobe JL. Dissociable effects of dietary sodium in early life upon somatic growth, fluid homeostasis, and spatial memory in mice of both sexes. Am J Physiol Regul Integr Comp Physiol 2021; 320:R438-R451. [PMID: 33439766 PMCID: PMC8238146 DOI: 10.1152/ajpregu.00281.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 12/16/2020] [Accepted: 01/12/2021] [Indexed: 12/18/2022]
Abstract
Postnatal growth failure is a common morbidity for preterm infants and is associated with adverse neurodevelopmental outcomes. Although sodium (Na) deficiency early in life impairs somatic growth, its impact on neurocognitive functions has not been extensively studied. We hypothesized that Na deficiency during early life is sufficient to cause growth failure and program neurobehavioral impairments in later life. C57BL/6J mice were placed on low- (0.4), normal- (1.5), or high- (3 g/kg) Na chow at weaning (PD22) and continued on the diet for 3 wk (to PD40). Body composition and fluid distribution were determined serially by time-domain NMR and bioimpedance spectroscopy, and anxiety, learning, and memory were assessed using the elevated plus maze and Morris water maze paradigms in later adulthood (PD63-PD69). During the diet intervention, body mass gains were suppressed in the low- compared with normal- and high-Na groups despite similar caloric uptake rates across groups. Fat mass was reduced in males but not in females fed low-Na diet. Fat-free mass and hydration were significantly reduced in both males and females fed the low-Na diet, although rapidly corrected after return to normal diet. Measures of anxiety-like behavior and learning in adulthood were not affected by diet in either sex, yet memory performance was modified by a complex interaction between sex and early life Na intake. These data support the concepts that Na deficiency impairs growth and that the amount of Na intake which supports optimal somatic growth during early life may be insufficient to fully support neurocognitive development.
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Affiliation(s)
- Jeffrey L Segar
- Division of Neonatology, Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Connie C Grobe
- Division of Neonatology, Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | | | - McKenzie L Ritter
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - John J Reho
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
- Comprehensive Rodent Metabolic Phenotyping Core, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Justin L Grobe
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
- Comprehensive Rodent Metabolic Phenotyping Core, Medical College of Wisconsin, Milwaukee, Wisconsin
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin
- Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin
- Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin
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Rivas F, Medeiros A, Quiroga C, Benítez D, Comini M, Rodríguez-Arce E, Machado I, Cerecetto H, Gambino D. New Pd-Fe ferrocenyl antiparasitic compounds with bioactive 8-hydroxyquinoline ligands: a comparative study with their Pt-Fe analogues. Dalton Trans 2021; 50:1651-1665. [PMID: 33449983 DOI: 10.1039/d0dt03963b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In the search for a more effective chemotherapy for the treatment of Human African Trypanosomiasis, a disease caused by the parasite Trypanosoma brucei, the development of ferrocenyl compounds has arisen as a promising strategy. In this work, five new Pd-Fe heterobimetallic [PdII(L)(dppf)](PF6) compounds, including 8-hydroxyquinolyl derivatives HL1-HL5 as bioactive ligands and dppf = 1,1'-bis(diphenylphosphino)ferrocene as the organometallic co-ligand, were synthesized and fully characterized in the solid state and in solution. Molecular structures of three compounds were solved by single crystal X-ray diffraction methods. The compounds displayed submicromolar or micromolar IC50 values against bloodstream T. brucei (IC50: 0.33-1.2 μM), and good selectivity towards the pathogen (SI: 4-102) with respect to mammalian macrophages (cell line J774). The new Pd complexes proved to be 2-fold to 45-fold more potent than the drug nifurtimox but most of them are less active than their Pt analogues. Potential molecular targets were studied. The complexes interact with DNA but they do not alter the intracellular thiol-redox homeostasis of the parasite. In order to understand and predict the main structural determinants on the anti-T. brucei activity, a search of quantitative structure-activity relationships (QSAR) was performed including all the [M(L)(dppf)](PF6) complexes, where M = Pd(ii) or Pt(ii), currently and previously developed by us. The correlation obtained shows the relevance of the electronic effects, the lipophilicity and the type of metal. According to the QSAR study, compounds with electron-withdrawing ligands, higher lipophilicity and harboring Pt would result in higher T. brucei cytotoxicity. From the whole series of [M(L)(dppf)](PF6) compounds developed, where M = Pt(ii) or Pd(ii) and HL = 8-hydroxyquinolyl derivatives, Pt-dppf-L4 (IC50 = 0.14 μM, SI = 48) was selected to perform an exploratory pre-clinical study in infected mice. This hit compound lacks acute toxicity when applied to animals in the dose/regimen described and exerts an anti-proliferative effect on parasites, which extends animal survival but is not curative.
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Affiliation(s)
- Feriannys Rivas
- Área Química Inorgánica, Programa de Posgrados, Facultad de Química, Universidad de la República, Gral. Flores 2124, 11800 Montevideo, Uruguay.
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10
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Segar JL, Balapattabi K, Reho JJ, Grobe CC, Burnett CML, Grobe JL. Quantification of body fluid compartmentalization by combined time-domain nuclear magnetic resonance and bioimpedance spectroscopy. Am J Physiol Regul Integr Comp Physiol 2021; 320:R44-R54. [PMID: 33085913 PMCID: PMC7847054 DOI: 10.1152/ajpregu.00227.2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/19/2020] [Accepted: 10/19/2020] [Indexed: 01/22/2023]
Abstract
The measurement of fluid compartmentalization, or the distribution of fluid volume between extracellular (ECF) and intracellular (ICF) spaces, historically requires complicated, burdensome, and often terminal methodologies that do not permit repeated or longitudinal experiments. New technologies including time-domain nuclear magnetic resonance (TD-NMR)-based methods allow for highly accurate measurements of total body water (TBW) within minutes in a noninvasive manner, but do not permit dissection of ECF versus ICF reservoirs. In contrast, methods such as bioimpedance spectroscopy (BIS) allow dissection of ECF versus ICF reservoirs but are hampered by dependence on many nuanced details in data collection that undermine confidence in experimental results. Here, we present a novel combinatorial use of these two technologies (NMR/BIS) to improve the accuracy of BIS-based assessments of ECF and ICF, while maintaining the advantages of these minimally invasive methods. Briefly, mice undergo TD-NMR and BIS-based measures, and then fat masses as derived by TD-NMR are used to correct BIS outputs. Mice of the C57BL/6J background were studied using NMR/BIS methods to assess the effects of acute furosemide injection and diet-induced obesity on fluid compartmentalization, and to examine the influence of sex, body mass and composition, and diet on TBW, ECF, and ICF. We discovered that in mice, sex and body size/composition have substantial and interactive effects on fluid compartmentalization. We propose that the combinatorial use of NMR/BIS methods will enable a revisioning of the types of longitudinal, kinetic studies that can be performed to understand the impact of various interventions on body fluid homeostasis.
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Affiliation(s)
- Jeffrey L Segar
- Division of Neonatology, Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | | | - John J Reho
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
- Comprehensive Rodent Metabolic Phenotyping Core, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Connie C Grobe
- Division of Neonatology, Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Colin M L Burnett
- Division of Cardiology, Department of Internal Medicine, University of Iowa Hospitals and Clinics, Iowa City, Iowa
| | - Justin L Grobe
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
- Comprehensive Rodent Metabolic Phenotyping Core, Medical College of Wisconsin, Milwaukee, Wisconsin
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin
- Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin
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11
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McFarlin BE, Chen Y, Priver TS, Ralph DL, Mercado A, Gamba G, Madhur MS, McDonough AA. Coordinate adaptations of skeletal muscle and kidney to maintain extracellular [K +] during K +-deficient diet. Am J Physiol Cell Physiol 2020; 319:C757-C770. [PMID: 32845718 PMCID: PMC7654654 DOI: 10.1152/ajpcell.00362.2020] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 08/17/2020] [Accepted: 08/19/2020] [Indexed: 12/16/2022]
Abstract
Extracellular fluid (ECF) potassium concentration ([K+]) is maintained by adaptations of kidney and skeletal muscle, responses heretofore studied separately. We aimed to determine how these organ systems work in concert to preserve ECF [K+] in male C57BL/6J mice fed a K+-deficient diet (0K) versus 1% K+ diet (1K) for 10 days (n = 5-6/group). During 0K feeding, plasma [K+] fell from 4.5 to 2 mM; hindlimb muscle (gastrocnemius and soleus) lost 28 mM K+ (from 115 ± 2 to 87 ± 2 mM) and gained 27 mM Na+ (from 27 ± 0.4 to 54 ± 2 mM). Doubling of muscle tissue [Na+] was not associated with inflammation, cytokine production or hypertension as reported by others. Muscle transporter adaptations in 0K- versus 1K-fed mice, assessed by immunoblot, included decreased sodium pump α2-β2 subunits, decreased K+-Cl- cotransporter isoform 3, and increased phosphorylated (p) Na+,K+,2Cl- cotransporter isoform 1 (NKCC1p), Ste20/SPS-1-related proline-alanine rich kinase (SPAKp), and oxidative stress-responsive kinase 1 (OSR1p) consistent with intracellular fluid (ICF) K+ loss and Na+ gain. Renal transporters' adaptations, effecting a 98% reduction in K+ excretion, included two- to threefold increased phosphorylated Na+-Cl- cotransporter (NCCp), SPAKp, and OSR1p abundance, limiting Na+ delivery to epithelial Na+ channels where Na+ reabsorption drives K+ secretion; and renal K sensor Kir 4.1 abundance fell 25%. Mass balance estimations indicate that over 10 days of 0K feeding, mice lose ~48 μmol K+ into the urine and muscle shifts ~47 μmol K+ from ICF to ECF, illustrating the importance of the concerted responses during K+ deficiency.
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Affiliation(s)
- Brandon E McFarlin
- Department of Physiology and Neuroscience, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Yuhan Chen
- Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cardiology, Nanjing University Medical School, Nanjing, China
| | - Taylor S Priver
- Department of Physiology and Neuroscience, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Donna L Ralph
- Department of Physiology and Neuroscience, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Adriana Mercado
- Department of Nephrology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Gerardo Gamba
- Molecular Physiology Unit, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México and Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Meena S Madhur
- Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Alicia A McDonough
- Department of Physiology and Neuroscience, Keck School of Medicine of the University of Southern California, Los Angeles, California
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12
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Kong BH, Teoh KH, Tan NH, Tan CS, Ng ST, Fung SY. Proteins from Lignosus tigris with selective apoptotic cytotoxicity towards MCF7 cell line and suppresses MCF7-xenograft tumor growth. PeerJ 2020; 8:e9650. [PMID: 32832273 PMCID: PMC7413093 DOI: 10.7717/peerj.9650] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 07/13/2020] [Indexed: 01/23/2023] Open
Abstract
Background Lignosus tigris, a recently discovered species of the unique Lignosus family, has been traditionally used by the indigenous communities in Peninsular Malaysia to treat various ailments and as an alternative medicine for cancer treatment. The L. tigris cultivar sclerotia (Ligno TG-K) was found to contain numerous bioactive compounds with beneficial biomedicinal properties and the sclerotial extract exhibited potent antioxidant activity. However, the anticancer property of the Ligno TG-K including in vitro and in vivo antitumor effects as well as its anticancer active compounds and the mechanisms has yet to be investigated. Methods The cytotoxicity of the Ligno TG-K against human breast (MCF7), prostate (PC3) and lung (A549) adenocarcinoma cell lines was evaluated using MTT cytotoxicity assay. The cytotoxic mechanisms of the active high molecular weight proteins (HMWp) fraction were investigated through detection of caspases activity and apoptotic-related proteins expression by Western blotting. The in vivo antitumor activity of the isolated HMWp was examined using MCF7 mouse xenograft model. Shotgun LC-MS/MS analysis was performed to identify the proteins in the HMWp. Results and Discussion Cold water extract of the sclerotia inhibited proliferation of MCF7, A549 and PC3 cells with IC50 ranged from 28.9 to 95.0 µg/mL. Bioassay guided fractionation of the extract revealed that HMWp exhibited selective cytotoxicity against MCF7 cells via induction of cellular apoptosis by the activation of extrinsic and intrinsic signaling pathways. HMWp activated expression of caspase-8 and -9 enzymes, and pro-apoptotic Bax protein whilst inhibiting expression of tumor survivor protein, Bcl-2. HMWp induced tumor-cell apoptosis and suppressed growth of tumor in MCF-7 xenograft mice. Lectins, serine proteases, RNase Gf29 and a 230NA deoxyribonuclease are the major cytotoxic proteins that accounted for 55.93% of the HMWp. Conclusion The findings from this study provided scientific evidences to support the traditional use of the L. tigris sclerotia for treatment of breast cancer. Several cytotoxic proteins with high abundance have been identified in the HMWp of the sclerotial extract and these proteins have potential to be developed into new anticancer agents or as adjunct cancer therapy.
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Affiliation(s)
- Boon Hong Kong
- Medicinal Mushroom Research Group, Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Wilayah Persekutuan, Malaysia
| | - Kean Hooi Teoh
- Department of Pathology, University of Malaya, Kuala Lumpur, Malaysia
| | - Nget Hong Tan
- Medicinal Mushroom Research Group, Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Wilayah Persekutuan, Malaysia
| | - Chon Seng Tan
- Ligno Research Initiative, Ligno Biotech Sdn Bhd, Balakong Jaya, Malaysia
| | - Szu Ting Ng
- Ligno Research Initiative, Ligno Biotech Sdn Bhd, Balakong Jaya, Malaysia
| | - Shin Yee Fung
- Medicinal Mushroom Research Group, Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Wilayah Persekutuan, Malaysia.,Center for Natural Products Research and Drug Discovery, University of Malaya, Kuala Lumpur, Malaysia.,University Malaya Centre for Proteomics Research, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
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13
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Rojas-Morales P, León-Contreras JC, Granados-Pineda J, Hernández-Pando R, Gonzaga G, Sánchez-Lozada LG, Osorio-Alonso H, Pedraza-Chaverri J, Tapia E. Protection against renal ischemia and reperfusion injury by short-term time-restricted feeding involves the mitochondrial unfolded protein response. Free Radic Biol Med 2020; 154:75-83. [PMID: 32376457 DOI: 10.1016/j.freeradbiomed.2020.04.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 04/15/2020] [Accepted: 04/26/2020] [Indexed: 12/18/2022]
Abstract
Food restriction improves metabolic health and increases resistance to stress in experimental animals. However, most studies have focused on long-term dietary restriction protocols consisting of several weeks or months of limited food ingestion. Here it was investigated the impact of 2-h time-restricted feeding (TRF) for one week on stress resistance in a rat model of kidney injury induced by ischemia and reperfusion (IR). At baseline, TRF reduced blood glucose, increased β-hydroxybutyrate and improved body composition in male Wistar rats. Importantly, implementing the one-week TRF schedule before ischemia significantly improved renal function, suppressed tubular injury, prevented the activation of extracellular signal-regulated kinase 1/2 (ERK1/2) and inhibited the development of interstitial fibrosis. These benefits were related to increased antioxidant protection, reduction in dynamin-related protein 1 (DRP1)-mediated mitochondrial fragmentation and modulation of the mitochondrial unfolded protein response (UPRmt). Specifically, preoperative TRF boosted the activation of the UPRmt in the acute phase after renal IR while promoted its resolution at the stage of fibrosis. Our study indicates that dietary preconditioning by short-term TRF improves the outcome of renal IR injury, and suggests that an optimal intervention that promotes kidney protection may not necessarily require adherence to restrictive diets for prolonged periods of time.
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Affiliation(s)
- Pedro Rojas-Morales
- Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico; Departamento de Fisiopatología Cardio-Renal, Instituto Nacional de Cardiología Ignacio Chavez, Ciudad de México, 14080, Mexico
| | - Juan Carlos León-Contreras
- Departamento de Patología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Ciudad de México, 14080, Mexico
| | - Jessica Granados-Pineda
- Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico
| | - Rogelio Hernández-Pando
- Departamento de Patología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Ciudad de México, 14080, Mexico
| | - Guillermo Gonzaga
- Departamento de Fisiopatología Cardio-Renal, Instituto Nacional de Cardiología Ignacio Chavez, Ciudad de México, 14080, Mexico
| | - Laura Gabriela Sánchez-Lozada
- Departamento de Fisiopatología Cardio-Renal, Instituto Nacional de Cardiología Ignacio Chavez, Ciudad de México, 14080, Mexico
| | - Horacio Osorio-Alonso
- Departamento de Fisiopatología Cardio-Renal, Instituto Nacional de Cardiología Ignacio Chavez, Ciudad de México, 14080, Mexico
| | - José Pedraza-Chaverri
- Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico
| | - Edilia Tapia
- Departamento de Fisiopatología Cardio-Renal, Instituto Nacional de Cardiología Ignacio Chavez, Ciudad de México, 14080, Mexico.
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14
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Morla L, Shore O, Lynch IJ, Merritt ME, Wingo CS. A noninvasive method to study the evolution of extracellular fluid volume in mice using time-domain nuclear magnetic resonance. Am J Physiol Renal Physiol 2020; 319:F115-F124. [PMID: 32475134 DOI: 10.1152/ajprenal.00377.2019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Maintaining water homeostasis is fundamental for cellular function. Many diseases and drugs affect water balance and plasma osmolality. Water homeostasis studies in small animals require the use of invasive or terminal methods that make intracellular fluid volume and extracellular fluid volume (ECF) monitoring over time stressful and time consuming. We examined the feasibility of monitoring mouse ECF by a noninvasive method using time-domain nuclear magnetic resonance (TD-NMR). This technique allows differentiation of protons in a liquid environment (free fluid) from protons in soft tissues containing a majority of either small molecules (lean) or large molecules (fat). Moreover, this apparatus enables rapid, noninvasive, and repeated measurements on the same animal. We assessed the feasibility of coupling TD-NMR analysis to a longitudinal metabolic cage study by monitoring mice daily. We determined the effect of 24-h water deprivation on mouse body parameters and detected a sequential and overlapping decrease in free fluid and lean mass during water deprivation. Finally, we studied the effect of mineralocorticoids that are known to induce a transient increase in ECF but for which no direct measurements have been performed in mice. We showed, for the first time, that mineralocorticoids induced a transient ~15% increase in free fluid in conscious mice. TD-NMR is, therefore, the first method to allow direct measurement of discrete changes in ECF in conscious small animals. This method allows analysis of kinetic changes to stimuli before investigating with terminal methods and will allow further understanding of fluid disorders.
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Affiliation(s)
- Luciana Morla
- Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale, Sorbonne Université, USPC, Université Paris Descartes, Université Paris Diderot, Paris, France.,Centre National de la Recherche Scientifique, ERL 8228, Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
| | - Oliver Shore
- North Florida/South Georgia Veterans Health System, Gainesville, Florida.,Department of Medicine, University of Florida, Gainesville, Florida
| | - I Jeanette Lynch
- North Florida/South Georgia Veterans Health System, Gainesville, Florida.,Department of Medicine, University of Florida, Gainesville, Florida
| | - Matthew E Merritt
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, Florida
| | - Charles S Wingo
- North Florida/South Georgia Veterans Health System, Gainesville, Florida.,Department of Medicine, University of Florida, Gainesville, Florida
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15
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Kozlowski MR, Kozlowski RE. A novel, small peptide with activity against human pancreatic cancer. Am J Cancer Res 2020; 10:1356-1365. [PMID: 32509384 PMCID: PMC7269787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 04/30/2020] [Indexed: 06/11/2023] Open
Abstract
KTH-222 is a novel, 8-amino acid length peptide. It is derived from a motif identified in a group of peptides that are related to atrial natriuretic peptide and that are able to inhibit cancer cell growth. We report here that KTH-222 inhibits the attachment, proliferation, and development of an invasive morphology in cultured human pancreatic tumor cells (MIA PaCa-2 and HPAC). At a biochemical level, it inhibits tubulin polymerization which may underlie these cellular effects. We further report that KTH-222 reduces the rate of tumor growth and prolongs survival in mice implanted with MIA PaCa-2 cells. In this model system, KTH-222 is more effective than gemcitabine, a drug commonly used in the treatment of pancreatic cancer. Furthermore, KTH-222 does not decrease the rate of weight gain in the treated mice, suggesting the absence of gross toxicity. These activities of KTH-222 suggest that it may be useful in the treatment of pancreatic cancer.
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Affiliation(s)
- Michael R Kozlowski
- Arizona College of Optometry, Midwestern UniversityGlendale, Arizona, United States of America
| | - Roni E Kozlowski
- Kalos Therapeutics IncorporatedPhoenix, Arizona, United States of America
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16
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Mullins TP, Tan WS, Carter DA, Gallo LA. Validation of non-invasive transcutaneous measurement for glomerular filtration rate in lean and obese C57BL/6J mice. Nephrology (Carlton) 2020; 25:575-581. [PMID: 32180312 DOI: 10.1111/nep.13713] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/01/2020] [Accepted: 03/04/2020] [Indexed: 02/02/2023]
Abstract
AIM The measurement of glomerular filtration rate (GFR) in experimental rodents is pivotal to understanding the progression of kidney disease and benefits of treatment strategies. A non-invasive clearance device has been developed, which measures transcutaneous decay of injected FITC-sinistrin in conscious rodents. The technique was validated against the well-established plasma clearance method in the same mice, but on consecutive days, using only models of uninephrectomy and polycystic kidney disease. We aimed to validate this widely used technique in the same lean or obese mice, at the same time. METHODS Five-week-old male C57BL/6J mice were randomised to a high fat diet (n = 12) or normal diet (n = 11) for 10 weeks. Transcutaneous and plasma clearance of FITC-sinistrin were measured simultaneously in each mouse. RESULTS In lean mice, there was a positive correlation between transcutaneous and plasma derived GFR (P < .01, R2 = .704), although there was an approximate 40% underestimation by the transcutaneous method (P < .0001). In obese mice, no correlation was observed between transcutaneous and plasma derived GFR, nor elimination half-life which removes any effect of the conversion factor and injected dose. The limits of agreement in a Bland-Altman plot were narrower when we used new conversion factors derived from mice in the current study and, in lean mice, a generic conversion factor which assumes 20% extracellular volume. CONCLUSION The non-invasive clearance device may be useful for serial GFR measurements in lean and healthy mice, provided validation studies have been carried out, but its utility in obesity requires further study.
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Affiliation(s)
- Thomas P Mullins
- School of Biomedical Sciences, The University of Queensland, St Lucia, Australia.,Mater Research Institute-UQ, Translational Research Institute, Woolloongabba, Australia
| | - Wei Sheng Tan
- School of Biomedical Sciences, The University of Queensland, St Lucia, Australia.,Duke-NUS Medical School, Singapore, Singapore
| | - David A Carter
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, Australia
| | - Linda A Gallo
- School of Biomedical Sciences, The University of Queensland, St Lucia, Australia.,Mater Research Institute-UQ, Translational Research Institute, Woolloongabba, Australia
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17
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Cortés-Álvarez NY, Vuelvas-Olmos CR, Pinto-González MF, Guzmán-Muñiz J, Gonzalez-Perez O, Moy-López NA. A high-fat diet during pregnancy impairs memory acquisition and increases leptin receptor expression in the hippocampus of rat offspring. Nutr Neurosci 2020; 25:146-158. [DOI: 10.1080/1028415x.2020.1728473] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Nadia Yanet Cortés-Álvarez
- Laboratory of Neuroscience, School of Psychology, University of Colima, Colima, Mexico
- Medical Sciences Program, School of Medicine, University of Colima, Colima, Mexico
| | - César Rubén Vuelvas-Olmos
- Laboratory of Neuroscience, School of Psychology, University of Colima, Colima, Mexico
- Medical Sciences Program, School of Medicine, University of Colima, Colima, Mexico
| | - María Fernanda Pinto-González
- Laboratory of Neuroscience, School of Psychology, University of Colima, Colima, Mexico
- Medical Sciences Program, School of Medicine, University of Colima, Colima, Mexico
| | - Jorge Guzmán-Muñiz
- Laboratory of Neuroscience, School of Psychology, University of Colima, Colima, Mexico
| | - Oscar Gonzalez-Perez
- Laboratory of Neuroscience, School of Psychology, University of Colima, Colima, Mexico
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18
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Haeger A, Alexander S, Vullings M, Kaiser FM, Veelken C, Flucke U, Koehl GE, Hirschberg M, Flentje M, Hoffman RM, Geissler EK, Kissler S, Friedl P. Collective cancer invasion forms an integrin-dependent radioresistant niche. J Exp Med 2020; 217:e20181184. [PMID: 31658985 PMCID: PMC7037234 DOI: 10.1084/jem.20181184] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 06/25/2019] [Accepted: 09/03/2019] [Indexed: 12/12/2022] Open
Abstract
Cancer fatalities result from metastatic dissemination and therapy resistance, both processes that depend on signals from the tumor microenvironment. To identify how invasion and resistance programs cooperate, we used intravital microscopy of orthotopic sarcoma and melanoma xenografts. We demonstrate that these tumors invade collectively and that, specifically, cells within the invasion zone acquire increased resistance to radiotherapy, rapidly normalize DNA damage, and preferentially survive. Using a candidate-based approach to identify effectors of invasion-associated resistance, we targeted β1 and αVβ3/β5 integrins, essential extracellular matrix receptors in mesenchymal tumors, which mediate cancer progression and resistance. Combining radiotherapy with β1 or αV integrin monotargeting in invading tumors led to relapse and metastasis in 40-60% of the cohort, in line with recently failed clinical trials individually targeting integrins. However, when combined, anti-β1/αV integrin dual targeting achieved relapse-free radiosensitization and prevented metastatic escape. Collectively, invading cancer cells thus withstand radiotherapy and DNA damage by β1/αVβ3/β5 integrin cross-talk, but efficient radiosensitization can be achieved by multiple integrin targeting.
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Affiliation(s)
- Anna Haeger
- Department of Cell Biology, Radboudumc, Nijmegen, Netherlands
| | - Stephanie Alexander
- Department of Dermatology, Venerology, and Allergology, University of Würzburg, Germany
- Rudolf Virchow Center for Experimental Biomedicine, University of Würzburg, Germany
- Department of Genitourinary Oncology, MD Anderson Cancer Center, Houston, TX
| | - Manon Vullings
- Department of Cell Biology, Radboudumc, Nijmegen, Netherlands
| | - Fabian M.P. Kaiser
- Rudolf Virchow Center for Experimental Biomedicine, University of Würzburg, Germany
| | | | - Uta Flucke
- Department of Pathology, Radboudumc, Nijmegen, Netherlands
| | - Gudrun E. Koehl
- Department of Surgery, Section of Experimental Surgery, University Hospital Regensburg, University of Regensburg, Germany
| | - Markus Hirschberg
- Department of Dermatology, Venerology, and Allergology, University of Würzburg, Germany
- Rudolf Virchow Center for Experimental Biomedicine, University of Würzburg, Germany
| | - Michael Flentje
- Department of Radiation Oncology, University of Würzburg, Germany
| | - Robert M. Hoffman
- Department of Surgery, University of California San Diego, San Diego, CA
- AntiCancer, Inc., San Diego, CA
| | - Edward K. Geissler
- Department of Surgery, Section of Experimental Surgery, University Hospital Regensburg, University of Regensburg, Germany
| | - Stephan Kissler
- Rudolf Virchow Center for Experimental Biomedicine, University of Würzburg, Germany
| | - Peter Friedl
- Department of Cell Biology, Radboudumc, Nijmegen, Netherlands
- Department of Dermatology, Venerology, and Allergology, University of Würzburg, Germany
- Rudolf Virchow Center for Experimental Biomedicine, University of Würzburg, Germany
- Department of Genitourinary Oncology, MD Anderson Cancer Center, Houston, TX
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19
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Masuda T, Muto S, Fukuda K, Watanabe M, Ohara K, Koepsell H, Vallon V, Nagata D. Osmotic diuresis by SGLT2 inhibition stimulates vasopressin-induced water reabsorption to maintain body fluid volume. Physiol Rep 2020; 8:e14360. [PMID: 31994353 PMCID: PMC6987478 DOI: 10.14814/phy2.14360] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 01/02/2020] [Accepted: 01/05/2020] [Indexed: 12/25/2022] Open
Abstract
Most of the filtered glucose is reabsorbed in the early proximal tubule by the sodium-glucose cotransporter SGLT2. The glycosuric effect of the SGLT2 inhibitor ipragliflozin is linked to a diuretic and natriuretic effect that activates compensatory increases in fluid and food intake to stabilize body fluid volume (BFV). However, the compensatory mechanisms that are activated on the level of renal tubules remain unclear. Type 2 diabetic Goto-Kakizaki (GK) rats were treated with vehicle or 0.01% (in diet) ipragliflozin with free access to fluid and food. After 8 weeks, GK rats were placed in metabolic cages for 24-hr. Ipragliflozin decreased body weight, serum glucose and systolic blood pressure, and increased fluid and food intake, urinary glucose and Na+ excretion, urine volume, and renal osmolar clearance, as well as urine vasopressin and solute-free water reabsorption (TcH2O). BFV, measured by bioimpedance spectroscopy, and fluid balance were similar among the two groups. Urine vasopressin in ipragliflozin-treated rats was negatively and positively associated with fluid balance and TcH2O, respectively. Ipragliflozin increased the renal membrane protein expression of SGLT2, aquaporin (AQP) 2 phosphorylated at Ser269 and vasopressin V2 receptor. The expression of SGLT1, GLUT2, AQP1, and AQP2 was similar between the groups. In conclusion, the SGLT2 inhibitor ipragliflozin induced a sustained glucosuria, diuresis, and natriuresis, with compensatory increases in fluid intake and vasopressin-induced TcH2O in proportion to the reduced fluid balance to maintain BFV. These results indicate that the osmotic diuresis induced by SGLT2 inhibition stimulates compensatory fluid intake and renal water reabsorption to maintain BFV.
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Affiliation(s)
- Takahiro Masuda
- Division of NephrologyDepartment of Internal MedicineJichi Medical UniversityShimotsukeTochigiJapan
| | - Shigeaki Muto
- Division of NephrologyDepartment of Internal MedicineJichi Medical UniversityShimotsukeTochigiJapan
| | - Keiko Fukuda
- Division of NephrologyDepartment of Internal MedicineJichi Medical UniversityShimotsukeTochigiJapan
| | - Minami Watanabe
- Division of NephrologyDepartment of Internal MedicineJichi Medical UniversityShimotsukeTochigiJapan
| | - Ken Ohara
- Division of NephrologyDepartment of Internal MedicineJichi Medical UniversityShimotsukeTochigiJapan
| | - Hermann Koepsell
- Department of Molecular Plant Physiology and BiophysicsJulius‐von‐Sachs‐Institute of BiosciencesUniversity of WürzburgWürzburgBavariaGermany
| | - Volker Vallon
- Division of Nephrology and HypertensionDepartment of Medicine and PharmacologyUniversity of California San Diego &VA San Diego Healthcare SystemSan DiegoCAUSA
| | - Daisuke Nagata
- Division of NephrologyDepartment of Internal MedicineJichi Medical UniversityShimotsukeTochigiJapan
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20
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Váradi J, Hermenean A, Gesztelyi R, Jeney V, Balogh E, Majoros L, Malanga M, Fenyvesi É, Szente L, Bácskay I, Vecsernyés M, Fehér P, Ujhelyi Z, Vasvári G, Árvai I, Rusznyák Á, Balta C, Herman H, Fenyvesi F. Pharmacokinetic Properties of Fluorescently Labelled Hydroxypropyl-Beta-Cyclodextrin. Biomolecules 2019; 9:biom9100509. [PMID: 31546989 PMCID: PMC6843445 DOI: 10.3390/biom9100509] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 09/09/2019] [Accepted: 09/15/2019] [Indexed: 12/19/2022] Open
Abstract
2-Hydroxypropyl-beta-cyclodextrin (HPBCD) is utilized in the formulation of pharmaceutical products and recently orphan designation was granted for the treatment of Niemann–Pick disease, type C. The exact mechanism of HPBCD action and side effects are not completely explained. We used fluorescently labelled hydroxypropyl-beta-cyclodextrin (FITC-HPBCD) to study its pharmacokinetic parameters in mice and compare with native HPBCD data. We found that FITC-HPBCD has fast distribution and elimination, similar to HPBCD. Interestingly animals could be divided into two groups, where the pharmacokinetic parameters followed or did not follow the two-compartment, first-order kinetic model. Tissue distribution studies revealed, that a significant amount of FITC-HPBCD could be detected in kidneys after 60 min treatment, due to its renal excretion. Ex vivo fluorescent imaging showed that fluorescence could be measured in lung, liver, brain and spleen after 30 min of treatment. To model the interaction and cellular distribution of FITC-HPBCD in the wall of blood vessels, we treated human umbilical vein endothelial cells (HUVECs) with FITC-HPBCD and demonstrated for the first time that this compound could be detected in the cytoplasm in small vesicles after 30 min of treatment. FITC-HPBCD has similar pharmacokinetic to HPBCD and can provide new information to the detailed mechanism of action of HPBCD.
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Affiliation(s)
- Judit Váradi
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
| | - Anca Hermenean
- Department of Histology, Faculty of Medicine, 'Vasile Goldiș' Western University of Arad, 86 Rebreanu Street, 310414 Arad, Romania
- Department of Biochemistry and Molecular Biology, University of Bucharest, Splaiul Independenței Street, no. 91-95, 050095, sector 5, Bucharest, Romania
| | - Rudolf Gesztelyi
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
| | - Viktória Jeney
- MTA-DE Lendület Vascular Pathophysiology Research Group, Research Centre for Molecular Medicine, Faculty of Medicine, University of Debrecen, 4012 Debrecen, Hungary
| | - Enikő Balogh
- MTA-DE Lendület Vascular Pathophysiology Research Group, Research Centre for Molecular Medicine, Faculty of Medicine, University of Debrecen, 4012 Debrecen, Hungary
| | - László Majoros
- Department of Medical Microbiology, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
| | - Milo Malanga
- Cyclolab Cyclodextrin R&D Laboratory Ltd., H-1097 Illatos St. 7., Budapest, Hungary
| | - Éva Fenyvesi
- Cyclolab Cyclodextrin R&D Laboratory Ltd., H-1097 Illatos St. 7., Budapest, Hungary
| | - Lajos Szente
- Cyclolab Cyclodextrin R&D Laboratory Ltd., H-1097 Illatos St. 7., Budapest, Hungary
| | - Ildikó Bácskay
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
| | - Miklós Vecsernyés
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
| | - Pálma Fehér
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
| | - Zoltán Ujhelyi
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
| | - Gábor Vasvári
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
- University of Debrecen, Doctoral School of Pharmaceutical Sciences, Nagyerdei St. 98, H-4032 Debrecen, Hungary
| | - István Árvai
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
| | - Ágnes Rusznyák
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
- University of Debrecen, Doctoral School of Pharmaceutical Sciences, Nagyerdei St. 98, H-4032 Debrecen, Hungary
| | - Cornel Balta
- Department of Histology, Faculty of Medicine, 'Vasile Goldiș' Western University of Arad, 86 Rebreanu Street, 310414 Arad, Romania
| | - Hildegard Herman
- Department of Histology, Faculty of Medicine, 'Vasile Goldiș' Western University of Arad, 86 Rebreanu Street, 310414 Arad, Romania
| | - Ferenc Fenyvesi
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary.
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21
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Li M, Nguyen L, Subramaniyan B, Bio M, Peer CJ, Kindrick J, Figg WD, Woo S, You Y. PBPK modeling-based optimization of site-specific chemo-photodynamic therapy with far-red light-activatable paclitaxel prodrug. J Control Release 2019; 308:86-97. [PMID: 31299262 DOI: 10.1016/j.jconrel.2019.07.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/03/2019] [Accepted: 07/08/2019] [Indexed: 01/10/2023]
Abstract
Photodynamic therapy (PDT) is a clinically approved therapeutic modality to treat certain types of cancers. However, incomplete ablation of tumor is a challenge. Visible and near IR-activatable prodrug, exhibiting the combined effects of PDT and local chemotherapy, showed better efficacy than PDT alone, without systemic side effects. Site-specifically released chemotherapeutic drugs killed cancer cells surviving from rapid PDT damage via bystander effects. Recently, we developed such a paclitaxel (PTX) prodrug that targets folate receptors. The goals of this study were to determine the optimal treatment conditions, based on modeling, for maximum antitumor efficacy in terms of drug-light interval (DLI), and to investigate the impact of rapid PDT effects on the pharmacokinetic (PK) profiles of the released PTX. PK profiles of the prodrug were determined in key organs and a quantitative systems pharmacology (QSP) model was established to simulate PK profiles of the prodrug and the released PTX. Three illumination time points (DLI = 0.5, 9, or 48 h) were selected for the treatment based on the plasma/tumor ratio of the prodrug to achieve V-PDT (vascular targeted-PDT, 0.5 h), C-PDT (cellular targeted-PDT, 48 h), or both V- and C-PDT (9 h). The anti-tumor efficacy of the PTX prodrug was greatly influenced by the DLI. The 9 h DLI group, when both tumor and plasma concentrations of the prodrug were sufficient, showed the best antitumor effect. The clearance of the released PTX from tumor seemed to be largely impacted by blood circulation. Here, QSP modeling was an invaluable tool for rational optimization of the treatment conditions and for a deeper mechanistic understanding of the positive physiological effect of the combination therapy.
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Affiliation(s)
- Mengjie Li
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City 73117, OK, USA
| | - Luong Nguyen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City 73117, OK, USA
| | - Bharathiraja Subramaniyan
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City 73117, OK, USA
| | - Moses Bio
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City 73117, OK, USA
| | - Cody J Peer
- Clinical Pharmacology Program, National Cancer Institute, NIH, Bethesda 20892, MD, USA
| | - Jessica Kindrick
- Clinical Pharmacology Program, National Cancer Institute, NIH, Bethesda 20892, MD, USA
| | - William D Figg
- Clinical Pharmacology Program, National Cancer Institute, NIH, Bethesda 20892, MD, USA
| | - Sukyung Woo
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City 73117, OK, USA.
| | - Youngjae You
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City 73117, OK, USA.
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22
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Brandl F, Merten H, Zimmermann M, Béhé M, Zangemeister-Wittke U, Plückthun A. Influence of size and charge of unstructured polypeptides on pharmacokinetics and biodistribution of targeted fusion proteins. J Control Release 2019; 307:379-392. [PMID: 31252038 DOI: 10.1016/j.jconrel.2019.06.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 06/22/2019] [Accepted: 06/24/2019] [Indexed: 01/19/2023]
Abstract
Alternative non-IgG binding proteins developed for therapy are small in size and, thus, are rapidly cleared from the circulation by renal filtration. To avoid repeated injection or continuous infusion for the maintenance of therapeutic serum concentrations, extensions of unfolded polypeptides have been developed to prolong serum half-life, but systematic, comparative studies investigating the influence of their size and charge on serum half-life, extravasation, tumor localization and excretion mechanisms have so far been lacking. Here we used a high-affinity Designed Ankyrin Repeat Protein (DARPin) targeting the tumor marker epithelial cell adhesion molecule (EpCAM) in a preclinical tumor xenograft model in mice, and fused it with a series of defined unstructured polypeptides. We used three different sizes of two previously described polypeptides, an uncharged one consisting of only Pro, Ala and Ser (termed PAS) and a charged one consisting of Pro, Ala, Ser, Thr, Gly, Glu (termed XTEN) and performed for the first time a precise comparative localization, distribution and extravasation study. Pharmacokinetic analysis showed a clear linear relationship between hydrodynamic radius and serum half-life across both polypeptides, reaching a half-life of up to 21 h in mice. Tumor uptake was EpCAM-dependent and directly proportional to half-life and size, showing an even tumor penetration for all fusion proteins without unspecific accumulation in non-target tissue. Unexpectedly, charge had no influence on any parameter, neither tumor nor tissue accumulation nor kidney elimination kinetics. Thus, both polypeptide types have a very similar potential for precise half-life modification and tumor targeting.
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Affiliation(s)
- Fabian Brandl
- Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland; Institute of Pharmacology, University of Bern, Inselspital INO-F, CH-3010 Bern, Switzerland
| | - Hannes Merten
- Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Martina Zimmermann
- Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Martin Béhé
- Center of Radiopharmaceutical Sciences, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - Uwe Zangemeister-Wittke
- Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland; Institute of Pharmacology, University of Bern, Inselspital INO-F, CH-3010 Bern, Switzerland.
| | - Andreas Plückthun
- Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.
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23
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Yu M, Xu J, Zheng J. Renal Clearable Luminescent Gold Nanoparticles: From the Bench to the Clinic. Angew Chem Int Ed Engl 2019; 58:4112-4128. [PMID: 30182529 PMCID: PMC6943938 DOI: 10.1002/anie.201807847] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Indexed: 12/14/2022]
Abstract
With more and more engineered nanoparticles (NPs) being translated to the clinic, the United States Food and Drug Administration (FDA) has recently issued the latest draft guidance on nanomaterial-containing drug products with an emphasis on understanding their in vivo transport and nano-bio interactions. Following these guidelines, NPs can be designed to target and treat diseases more efficiently than small molecules, have minimum accumulation in normal tissues, and induce minimum toxicity. In this Minireview, we integrate this guidance with our ten-year studies on developing renal clearable luminescent gold NPs. These gold NPs resist serum protein adsorption, escape liver uptake, target cancerous tissues, and report kidney dysfunction at early stages. At the same time, off-target gold NPs can be eliminated by the kidneys with minimum accumulation in the body. Additionally, we identify challenges to the translation of renal clearable gold NPs from the bench to the clinic.
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Affiliation(s)
- Mengxiao Yu
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX 75080 (USA)
- ClearNano, Inc., Venture Development Center, The University of Texas at Dallas, 17217 Waterview Parkway, Suite 1.202, Dallas, TX 75252 (USA)
| | - Jing Xu
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX 75080 (USA)
| | - Jie Zheng
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX 75080 (USA)
- ClearNano, Inc., Venture Development Center, The University of Texas at Dallas, 17217 Waterview Parkway, Suite 1.202, Dallas, TX 75252 (USA)
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24
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Yu M, Xu J, Zheng J. Renal Clearable Luminescent Gold Nanoparticles: From the Bench to the Clinic. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201807847] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Mengxiao Yu
- Department of Chemistry and BiochemistryThe University of Texas at Dallas 800 W. Campbell Rd. Richardson TX 75080 USA
- ClearNano, Inc., Venture Development CenterThe University of Texas at Dallas 17217 Waterview Parkway, Suite 1.202 Dallas TX 75252 USA
| | - Jing Xu
- Department of Chemistry and BiochemistryThe University of Texas at Dallas 800 W. Campbell Rd. Richardson TX 75080 USA
| | - Jie Zheng
- Department of Chemistry and BiochemistryThe University of Texas at Dallas 800 W. Campbell Rd. Richardson TX 75080 USA
- ClearNano, Inc., Venture Development CenterThe University of Texas at Dallas 17217 Waterview Parkway, Suite 1.202 Dallas TX 75252 USA
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25
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Scarfe L, Schock-Kusch D, Ressel L, Friedemann J, Shulhevich Y, Murray P, Wilm B, de Caestecker M. Transdermal Measurement of Glomerular Filtration Rate in Mice. J Vis Exp 2018. [PMID: 30394397 PMCID: PMC6235579 DOI: 10.3791/58520] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Transdermal analysis of glomerular filtration rate (GFR) is an established technique that is used to assess renal function in mouse and rat models of acute kidney injury and chronic kidney disease. The measurement system consists of a miniaturized fluorescence detector that is directly attached to the skin on the back of conscious, freely moving animals, and measures the excretion kinetics of the exogenous GFR tracer, fluorescein-isothiocyanate (FITC) conjugated sinistrin (an inulin analog). This system has been described in detail in rats. However, because of their smaller size, measurement of transcutaneous GFR in mice presents additional technical challenges. In this paper we therefore provide the first detailed practical guide to the use of transdermal GFR monitors in mice based on the combined experience of three different investigators who have been performing this assay in mice over a number of years.
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Affiliation(s)
- Lauren Scarfe
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center; Department of Cellular and Molecular Physiology, University of Liverpool
| | | | - Lorenzo Ressel
- Department of Veterinary Pathology and Public Health, Institute of Veterinary Science, University of Liverpool
| | | | | | - Patricia Murray
- Department of Cellular and Molecular Physiology, University of Liverpool
| | - Bettina Wilm
- Department of Cellular and Molecular Physiology, University of Liverpool;
| | - Mark de Caestecker
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center;
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26
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Masuda T, Watanabe Y, Fukuda K, Watanabe M, Onishi A, Ohara K, Imai T, Koepsell H, Muto S, Vallon V, Nagata D. Unmasking a sustained negative effect of SGLT2 inhibition on body fluid volume in the rat. Am J Physiol Renal Physiol 2018; 315:F653-F664. [PMID: 29790389 PMCID: PMC6734084 DOI: 10.1152/ajprenal.00143.2018] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 05/08/2018] [Accepted: 05/16/2018] [Indexed: 12/25/2022] Open
Abstract
The chronic intrinsic diuretic and natriuretic tone of sodium-glucose cotransporter 2 (SGLT2) inhibitors is incompletely understood because their effect on body fluid volume (BFV) has not been fully evaluated and because they often increase food and fluid intake at the same time. Here we first compared the effect of the SGLT2 inhibitor ipragliflozin (Ipra, 0.01% in diet for 8 wk) and vehicle (Veh) in Spontaneously Diabetic Torii rat, a nonobese type 2 diabetic model, and nondiabetic Sprague-Dawley rats. In nondiabetic rats, Ipra increased urinary excretion of Na+ (UNaV) and fluid (UV) associated with increased food and fluid intake. Diabetes increased these four parameters, but Ipra had no further effect, probably because of its antihyperglycemic effect, such that glucosuria and, as a consequence, food and fluid intake were unchanged. Fluid balance and BFV, determined by bioimpedance spectroscopy, were similar among the four groups. To study the impact of food and fluid intake, nondiabetic rats were treated for 7 days with Veh, Ipra, or Ipra+pair feeding+pair drinking (Pair-Ipra). Pair-Ipra maintained a small increase in UV and UNaV versus Veh despite similar food and fluid intake. Pair-Ipra induced a negative fluid balance and decreased BFV, whereas Ipra or Veh had no significant effect compared with basal values. In conclusion, SGLT2 inhibition induces a sustained diuretic and natriuretic tone. Homeostatic mechanisms are activated to stabilize BFV, including compensatory increases in fluid and food intake.
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Affiliation(s)
- Takahiro Masuda
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Yuko Watanabe
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Keiko Fukuda
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Minami Watanabe
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Akira Onishi
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Ken Ohara
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Toshimi Imai
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Hermann Koepsell
- Department of Molecular Plant Physiology and Biophysics, Julius-von-Sachs-Institute, University of Würzburg , Würzburg , Germany
| | - Shigeaki Muto
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Volker Vallon
- Division of Nephrology and Hypertension, Departments of Medicine and Pharmacology, University of California San Diego and VA San Diego Healthcare System, San Diego, CA
| | - Daisuke Nagata
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
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27
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Abstract
Magnetic Resonance Spectroscopy is a technique that has the capability of measuring metabolites in vivo and, in appropriate conditions, to infer its metabolic rates. The success of MRS depends a lot on its sensitivity, which limits the usage of X-nuclei MRS. However, technological developments and refinements in methods have made in vivo heteronuclear MRS possible in humans and in small animals. This chapter provides detailed descriptions of the main procedures needed to perform successful in vivo heteronuclear MRS experiments, with a particular focus on experimental setup in 13C MRS experiments in rodents.
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Affiliation(s)
- Blanca Lizarbe
- Laboratory for Functional and Metabolic Imaging (LIFMET), École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
| | - Antoine Cherix
- Laboratory for Functional and Metabolic Imaging (LIFMET), École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Rolf Gruetter
- Laboratory for Functional and Metabolic Imaging (LIFMET), École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Department of Radiology, University of Geneva, Geneva, Switzerland.,Department of Radiology, University of Lausanne, Lausanne, Switzerland
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28
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Xu J, Yu M, Peng C, Carter P, Tian J, Ning X, Zhou Q, Tu Q, Zhang G, Dao A, Jiang X, Kapur P, Hsieh JT, Zhao X, Liu P, Zheng J. Dose Dependencies and Biocompatibility of Renal Clearable Gold Nanoparticles: From Mice to Non-human Primates. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710584] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jing Xu
- Department of Chemistry and Biochemistry; The University of Texas at Dallas; 800 W. Campbell Rd. Richardson TX 75080 USA
| | - Mengxiao Yu
- Department of Chemistry and Biochemistry; The University of Texas at Dallas; 800 W. Campbell Rd. Richardson TX 75080 USA
| | - Chuanqi Peng
- Department of Chemistry and Biochemistry; The University of Texas at Dallas; 800 W. Campbell Rd. Richardson TX 75080 USA
| | - Phoebe Carter
- Department of Chemistry and Biochemistry; The University of Texas at Dallas; 800 W. Campbell Rd. Richardson TX 75080 USA
| | - Jia Tian
- General Research Institute for Nonferrous Metals; 2 Xinjiekou Outer St. Beijing 100088 China
| | - Xuhui Ning
- Department of Chemistry and Biochemistry; The University of Texas at Dallas; 800 W. Campbell Rd. Richardson TX 75080 USA
| | - Qinhan Zhou
- Department of Chemistry and Biochemistry; The University of Texas at Dallas; 800 W. Campbell Rd. Richardson TX 75080 USA
| | - Qiu Tu
- Kunming Institute of Zoology; Chinese Academy of Sciences; 32 Jiaochang Donglu Kunming 650223 China
| | - Greg Zhang
- Department of Chemistry and Biochemistry; The University of Texas at Dallas; 800 W. Campbell Rd. Richardson TX 75080 USA
| | - Anthony Dao
- Department of Chemistry and Biochemistry; The University of Texas at Dallas; 800 W. Campbell Rd. Richardson TX 75080 USA
| | - Xingya Jiang
- Department of Chemistry and Biochemistry; The University of Texas at Dallas; 800 W. Campbell Rd. Richardson TX 75080 USA
| | - Payal Kapur
- Department of Pathology; The University of Texas Southwestern Medical Center; 5323 Harry Hines Blvd. Dallas TX 75390 USA
- Department of Urology; The University of Texas Southwestern Medical Center; 5323 Harry Hines Blvd. Dallas TX 75390 USA
| | - Jer-Tsong Hsieh
- Department of Urology; The University of Texas Southwestern Medical Center; 5323 Harry Hines Blvd. Dallas TX 75390 USA
| | - Xudong Zhao
- Kunming Institute of Zoology; Chinese Academy of Sciences; 32 Jiaochang Donglu Kunming 650223 China
| | - Pengyu Liu
- General Research Institute for Nonferrous Metals; 2 Xinjiekou Outer St. Beijing 100088 China
| | - Jie Zheng
- Department of Chemistry and Biochemistry; The University of Texas at Dallas; 800 W. Campbell Rd. Richardson TX 75080 USA
- Department of Urology; The University of Texas Southwestern Medical Center; 5323 Harry Hines Blvd. Dallas TX 75390 USA
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29
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Xu J, Yu M, Peng C, Carter P, Tian J, Ning X, Zhou Q, Tu Q, Zhang G, Dao A, Jiang X, Kapur P, Hsieh JT, Zhao X, Liu P, Zheng J. Dose Dependencies and Biocompatibility of Renal Clearable Gold Nanoparticles: From Mice to Non-human Primates. Angew Chem Int Ed Engl 2017; 57:266-271. [PMID: 29160029 DOI: 10.1002/anie.201710584] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 11/20/2017] [Indexed: 01/05/2023]
Abstract
While dose dependencies in pharmacokinetics and clearance are often observed in clinically used small molecules, very few studies have been dedicated to the understandings of potential dose-dependent in vivo transport of nanomedicines. Here we report that the pharmacokinetics and clearance of renal clearable gold nanoparticles (GS-AuNPs) are strongly dose-dependent once injection doses are above 15 mg kg-1 : high dose expedited the renal excretion and shortened the blood retention. As a result, the no-observed-adverse-effect-level (NOAEL) of GS-AuNPs was >1000 mg kg-1 in CD-1 mice. The efficient renal clearance and high compatibility can be translated to the non-human primates: no adverse effects were observed within 90 days after intravenous injection of 250 mg kg-1 GS-AuNPs. These fundamental understandings of dose effect on the in vivo transport of ultrasmall AuNPs open up a pathway to maximize their biomedical potentials and minimize their toxicity in the future clinical translation.
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Affiliation(s)
- Jing Xu
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
| | - Mengxiao Yu
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
| | - Chuanqi Peng
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
| | - Phoebe Carter
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
| | - Jia Tian
- General Research Institute for Nonferrous Metals, 2 Xinjiekou Outer St., Beijing, 100088, China
| | - Xuhui Ning
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
| | - Qinhan Zhou
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
| | - Qiu Tu
- Kunming Institute of Zoology, Chinese Academy of Sciences, 32 Jiaochang Donglu, Kunming, 650223, China
| | - Greg Zhang
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
| | - Anthony Dao
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
| | - Xingya Jiang
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA
| | - Payal Kapur
- Department of Pathology, The University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390, USA.,Department of Urology, The University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390, USA
| | - Jer-Tsong Hsieh
- Department of Urology, The University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390, USA
| | - Xudong Zhao
- Kunming Institute of Zoology, Chinese Academy of Sciences, 32 Jiaochang Donglu, Kunming, 650223, China
| | - Pengyu Liu
- General Research Institute for Nonferrous Metals, 2 Xinjiekou Outer St., Beijing, 100088, China
| | - Jie Zheng
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA.,Department of Urology, The University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390, USA
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Aubertin G, Sayeh A, Dillenseger JP, Ayme-Dietrich E, Choquet P, Niederhoffer N. Comparison of bioimpedance spectroscopy and X-Ray micro-computed tomography for total fat volume measurement in mice. PLoS One 2017; 12:e0183523. [PMID: 28817729 PMCID: PMC5560854 DOI: 10.1371/journal.pone.0183523] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 08/04/2017] [Indexed: 12/28/2022] Open
Abstract
Obesity and the metabolic syndrome are two pathologies whose prevalence are in a constant increase. Evaluation of the total fat mass but also of the distribution between visceral and subcutaneous adipose tissue are important factors while assessing the pathophysiology of these two pathologies. Computed tomography (CT) and bioimpedance (BIS) are the translational methods the most frequently used in human beings as well as in rodent models in longitudinal studies on adiposity and obesity. Surprisingly, no direct comparison of micro-CT and BIS was reported yet in mice. Therefore, the present study was carried out to evaluate and compare the accuracy and the uncertainty of measurement of micro-CT and BIS in this species. The proportion of fat mass was measured with BIS, micro-CT and direct post-mortem tissue weight, and correlations between the data were established to evaluate the accuracy of the methods but also the uncertainty of BIS and micro-CT. There were significant correlations between weights of fat tissues on scale and proportion of total fat mass determined by BIS or micro-CT (r = 0.81 and 0.86 respectively) but both methods overestimated the total fat mass, especially in the smallest animals; overestimation of fat mass was amplified with BIS compared to micro-CT. In addition BIS and micro-CT were highly correlated (r = 0.94). Test-test reliability showed a greater variability of the BIS with respect to the micro-CT (coefficient of variation = 17.2 vs 5.6% respectively). Hence, as far as subtle differences between groups or changes within one group are awaited, micro-CT may appear as the most reliable method for determination of fat mass in mice. Micro-CT, unlike BIS, will also allow to qualitatively and quantitatively differentiate between subcutaneous and visceral adipose tissues, which is of major importance in studies on adiposity and its complications.
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Affiliation(s)
- Gaelle Aubertin
- Laboratoire de Neurobiologie et Pharmacologie Cardiovasculaire (EA7296), Faculté de Médecine, Fédération de Médecine Translationnelle, Université de Strasbourg, Strasbourg, France
| | - Amira Sayeh
- Preclinical Imaging Lab, UF 6237, Pôle d’imagerie, Hôpitaux Universitaires de Strasbourg, ICube, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France
| | - Jean-Philippe Dillenseger
- Preclinical Imaging Lab, UF 6237, Pôle d’imagerie, Hôpitaux Universitaires de Strasbourg, ICube, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France
| | - Estelle Ayme-Dietrich
- Laboratoire de Neurobiologie et Pharmacologie Cardiovasculaire (EA7296), Faculté de Médecine, Fédération de Médecine Translationnelle, Université de Strasbourg, Strasbourg, France
| | - Philippe Choquet
- Preclinical Imaging Lab, UF 6237, Pôle d’imagerie, Hôpitaux Universitaires de Strasbourg, ICube, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France
| | - Nathalie Niederhoffer
- Laboratoire de Neurobiologie et Pharmacologie Cardiovasculaire (EA7296), Faculté de Médecine, Fédération de Médecine Translationnelle, Université de Strasbourg, Strasbourg, France
- * E-mail:
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Schäff CT, Pliquett U, Tuchscherer A, Pfuhl R, Görs S, Metges CC, Hammon HM, Kröger-Koch C. Evaluation of electrical broad bandwidth impedance spectroscopy as a tool for body composition measurement in cows in comparison with body measurements and the deuterium oxide dilution method. J Anim Sci 2017; 95:2041-2051. [PMID: 28727018 DOI: 10.2527/jas.2017.1414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Body fatness and degree of body fat mobilization in cows vary enormously during their reproduction cycle and influence energy partitioning and metabolic adaptation. The objective of the study was to test bioelectrical impedance spectroscopy (BIS) as a method for predicting fat depot mass (FDM), in living cows. The FDM is defined as the sum of subcutaneous, omental, mesenteric, retroperitoneal, and carcass fat mass. Bioelectrical impedance spectroscopy is compared with the prediction of FDM from the deuterium oxide (DO) dilution method and from body conformation measurements. Charolais × Holstein Friesian (HF; = 18; 30 d in milk) crossbred cows and 2 HF (lactating and nonlactating) cows were assessed by body conformation measurements, BIS, and the DO dilution method. The BCS of cows was a mean of 3.68 (SE 0.64). For the DO dilution method, a bolus of 0.23 g/kg BW DO (60 atom%) was intravenously injected and deuterium (D) enrichment was analyzed in plasma and whey by stabile isotope mass spectrometry, and total body water content was calculated. Impedance measurement was performed using a 4-electrode interface and time domain-based measurement system consisting of a voltage/current converter for applying current stimulus and an amplifier for monitoring voltage across the sensor electrodes. For the BIS, we used complex impedances over three frequency decades that delivers information on intra- and extracellular water and capacity of cell membranes. Impedance data (resistance of extra- and intracellular space, cell membrane capacity, and phase angle) were extracted 1) by simple curve fit to extract the resistance at direct current and high frequency and 2) by using an electrical equivalent circuit. Cows were slaughtered 7 d after BIS and D enrichment measurements and dissected for the measurement of FDM. Multiple linear regression analyses were performed to predict FDM based on data obtained from body conformation measurements, BIS, and D enrichment, and applied methods were evaluated by cross-validation. The FDM varied widely between cows and was correlated to D enrichment in plasma ( = 0.91, < 0.05). Prediction of FDM by body size measurements was less precise ( = 0.84), but FDM prediction was more accurate using D enrichment in plasma ( = 0.90) and BIS ( = 0.99) data. Therefore, both BIS and D enrichment analysis resulted in similarly good predictions of FDM in cows, and we conclude that BIS could have the potential to predict FDM in dairy cows from 40 to 380 kg.
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Lopez AM, Chuang JC, Turley SD. Measurement of Rates of Cholesterol and Fatty Acid Synthesis In Vivo Using Tritiated Water. Methods Mol Biol 2017; 1583:241-256. [PMID: 28205179 DOI: 10.1007/978-1-4939-6875-6_18] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Every organ in the body is capable of synthesizing cholesterol de novo but at rates that vary with a constellation of factors. A significant proportion of the hydrogen atoms present in cholesterol that is synthesized in the body are derived from water. Thus, although water ordinarily makes up the bulk of body mass, the acute enrichment of the body water pool with a sufficiently large amount of tritiated water over a short interval of time (usually 1 h) yields measurable rates of incorporation of the labeled water into newly generated cholesterol and also fatty acids. Such data can provide a quantitative measure of how specific genetic, dietary, and pharmacological manipulations impact not just the rate of cholesterol synthesis in particular organs but also rates of whole-body cholesterol production and turnover.
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Affiliation(s)
- Adam M Lopez
- Division of Digestive and Liver Diseases, Department of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390-9151, USA
| | - Jen-Chieh Chuang
- Division of Digestive and Liver Diseases, Department of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390-9151, USA
| | - Stephen D Turley
- Division of Digestive and Liver Diseases, Department of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390-9151, USA.
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Khoshnevisan A, Jauregui-Osoro M, Shaw K, Torres JB, Young JD, Ramakrishnan NK, Jackson A, Smith GE, Gee AD, Blower PJ. [(18)F]tetrafluoroborate as a PET tracer for the sodium/iodide symporter: the importance of specific activity. EJNMMI Res 2016; 6:34. [PMID: 27103614 PMCID: PMC4840125 DOI: 10.1186/s13550-016-0188-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 04/11/2016] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND [(18)F]BF4 (-), the first (18)F-labelled PET imaging agent for the sodium/iodide symporter (NIS), was produced by isotopic exchange yielding a product with limited specific activity (SA, ca. 1 GBq/μmol) posing a risk of sub-optimal target-to-background ratios (TBR) in PET images due to saturation of NIS in vivo. We sought to quantify this risk and to develop a method of production of [(18)F]BF4 (-) with higher SA. METHODS A new radiosynthesis of [(18)F]BF4 (-) was developed, involving reaction of [(18)F]F(-) with boron trifluoride diethyl etherate under anhydrous conditions, guided by (11)B and (19)F NMR studies of equilibria involving BF4 (-) and BF3. The SA of the product was determined by ion chromatography. The IC50 of [(19)F]BF4 (-) as an inhibitor of [(18)F]BF4 (-) uptake was determined in vitro using HCT116-C19 human colon cancer cells expressing the human form of NIS (hNIS). The influence of [(19)F]BF4 (-) dose on biodistribution in vivo was evaluated in normal mice by nanoPET imaging and ex vivo tissue counting. RESULTS An IC50 of 4.8 μΜ was found in vitro indicating a significant risk of in vivo NIS saturation at SA achieved by the isotopic exchange labelling method. In vivo thyroid and salivary gland uptake decreased significantly with [(19)F]BF4 (-) doses above ca. 10 μg/kg. The new radiosynthesis gave high radiochemical purity (>99 %) and moderate yield (15 %) and improved SA (>5 GBq/μmol) from a starting activity of only 1.5 GBq. CONCLUSIONS [(18)F]BF4 (-) produced at previously reported levels of SA (1 GBq/μmol) can lead to reduced uptake in NIS-expressing tissues in mice. This is much less likely in humans. The synthetic approach described provides an alternative for production of [(18)F]BF4 (-) at higher SA with sufficient yield and without need for unusually high starting activity of [(18)F]fluoride, removing the risk of NIS saturation in vivo even in mice. TRIAL REGISTRATION ISRCTN75827286 .
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Affiliation(s)
- Alex Khoshnevisan
- Division of Imaging Sciences and Biomedical Engineering, King's College London, 4th Floor Lambeth Wing, St. Thomas' Hospital, London, SE1 7EH, UK
| | - Maite Jauregui-Osoro
- Division of Imaging Sciences and Biomedical Engineering, King's College London, 4th Floor Lambeth Wing, St. Thomas' Hospital, London, SE1 7EH, UK
| | - Karen Shaw
- Division of Imaging Sciences and Biomedical Engineering, King's College London, 4th Floor Lambeth Wing, St. Thomas' Hospital, London, SE1 7EH, UK
| | - Julia Baguña Torres
- Division of Imaging Sciences and Biomedical Engineering, King's College London, 4th Floor Lambeth Wing, St. Thomas' Hospital, London, SE1 7EH, UK
| | - Jennifer D Young
- Division of Imaging Sciences and Biomedical Engineering, King's College London, 4th Floor Lambeth Wing, St. Thomas' Hospital, London, SE1 7EH, UK
| | - Nisha K Ramakrishnan
- Division of Imaging Sciences and Biomedical Engineering, King's College London, 4th Floor Lambeth Wing, St. Thomas' Hospital, London, SE1 7EH, UK
| | - Alex Jackson
- The Grove Centre, GE Healthcare, White Lion Road, Amersham, UK
| | - Gareth E Smith
- The Grove Centre, GE Healthcare, White Lion Road, Amersham, UK
| | - Antony D Gee
- Division of Imaging Sciences and Biomedical Engineering, King's College London, 4th Floor Lambeth Wing, St. Thomas' Hospital, London, SE1 7EH, UK
| | - Philip J Blower
- Division of Imaging Sciences and Biomedical Engineering, King's College London, 4th Floor Lambeth Wing, St. Thomas' Hospital, London, SE1 7EH, UK.
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Incorporation of non-canonical amino acids into the developing murine proteome. Sci Rep 2016; 6:32377. [PMID: 27572480 PMCID: PMC5004113 DOI: 10.1038/srep32377] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 08/09/2016] [Indexed: 12/25/2022] Open
Abstract
Analysis of the developing proteome has been complicated by a lack of tools that can be easily employed to label and identify newly synthesized proteins within complex biological mixtures. Here, we demonstrate that the methionine analogs azidohomoalanine and homopropargylglycine can be globally incorporated into the proteome of mice through facile intraperitoneal injections. These analogs contain bio-orthogonal chemical handles to which fluorescent tags can be conjugated to identify newly synthesized proteins. We show these non-canonical amino acids are incorporated into various tissues in juvenile mice and in a concentration dependent manner. Furthermore, administration of these methionine analogs to pregnant dams during a critical stage of murine development, E10.5-12.5 when many tissues are assembling, does not overtly disrupt development as assessed by proteomic analysis and normal parturition and growth of pups. This successful demonstration that non-canonical amino acids can be directly administered in vivo will enable future studies that seek to characterize the murine proteome during growth, disease and repair.
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Pankhurst MW, Leathart BLA, Batchelor NJ, McLennan IS. The Anti-Müllerian Hormone Precursor (proAMH) Is Not Converted to the Receptor-Competent Form (AMHN,C) in the Circulating Blood of Mice. Endocrinology 2016; 157:1622-9. [PMID: 26828745 DOI: 10.1210/en.2015-1834] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Anti-Müllerian hormone (AMH) is a gonadal hormone that regulates aspects of male sexual differentiation and ovarian function. AMH is synthesized as the AMH proprotein precursor (proAMH), which is converted to a receptor-binding form (AMHN,C) by proteolytic cleavage. ProAMH appears to be the predominant species in the ovary, whereas AMHN,C is the prevalent form in circulation. The aim of this study was to determine whether cleavage of proAMH occurs before it is released from the gonad or while in circulation. The individual half-lives of the proAMH and AMHN,C were also determined, as this has important implications for understanding the mechanisms of AMH signaling. Recombinant human (rh)-proAMH or rh-AMHN,C was injected iv into mice. AMH levels were analyzed in a series of repeated blood samples using an assay that detects human, but not murine, AMH. The degree of cleavage of injected proAMH was assessed by immunoprecipitation and Western blotting. The elimination half-life curves were biphasic. The fast-phase elimination was estimated at 6 and 11 minutes for rh-proAMH and rh-AMHN,C, respectively. The slow-phase half-life estimates were 2.4 and 3.8 hours for rh-proAMH and rh-AMHN,C, respectively. Immunoprecipitation of rh-proAMH 1 hour after injection determined that no detectable conversion of proAMH to AMHN,C was occurring in circulation. The data suggest that the ratio of proAMH to AMHN,C in the circulation is not altered after it is released from the gonads and that the levels of these 2 circulating forms are likely to reflect AMH activity in the gonad.
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Affiliation(s)
- Michael W Pankhurst
- Department of Anatomy (M.W.P., B.-L.A.L., N.J.B., I.S.M.), University of Otago, Dunedin, 9054, New Zealand; and Brain Health Research Centre (I.S.M.), University of Otago, Dunedin, 9054, New Zealand
| | - Brandi-Lee A Leathart
- Department of Anatomy (M.W.P., B.-L.A.L., N.J.B., I.S.M.), University of Otago, Dunedin, 9054, New Zealand; and Brain Health Research Centre (I.S.M.), University of Otago, Dunedin, 9054, New Zealand
| | - Nicola J Batchelor
- Department of Anatomy (M.W.P., B.-L.A.L., N.J.B., I.S.M.), University of Otago, Dunedin, 9054, New Zealand; and Brain Health Research Centre (I.S.M.), University of Otago, Dunedin, 9054, New Zealand
| | - Ian S McLennan
- Department of Anatomy (M.W.P., B.-L.A.L., N.J.B., I.S.M.), University of Otago, Dunedin, 9054, New Zealand; and Brain Health Research Centre (I.S.M.), University of Otago, Dunedin, 9054, New Zealand
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Yoshimatsu H, Konno Y, Ishii K, Satsukawa M, Yamashita S. Usefulness of minipigs for predicting human pharmacokinetics: Prediction of distribution volume and plasma clearance. Drug Metab Pharmacokinet 2016; 31:73-81. [DOI: 10.1016/j.dmpk.2015.11.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Revised: 11/10/2015] [Accepted: 11/11/2015] [Indexed: 11/16/2022]
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Desai D, Prabhakar N, Mamaeva V, Karaman DŞ, Lähdeniemi IAK, Sahlgren C, Rosenholm JM, Toivola DM. Targeted modulation of cell differentiation in distinct regions of the gastrointestinal tract via oral administration of differently PEG-PEI functionalized mesoporous silica nanoparticles. Int J Nanomedicine 2016; 11:299-313. [PMID: 26855569 PMCID: PMC4725644 DOI: 10.2147/ijn.s94013] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Targeted delivery of drugs is required to efficiently treat intestinal diseases such as colon cancer and inflammation. Nanoparticles could overcome challenges in oral administration caused by drug degradation at low pH and poor permeability through mucus layers, and offer targeted delivery to diseased cells in order to avoid adverse effects. Here, we demonstrate that functionalization of mesoporous silica nanoparticles (MSNs) by polymeric surface grafts facilitates transport through the mucosal barrier and enhances cellular internalization. MSNs functionalized with poly(ethylene glycol) (PEG), poly(ethylene imine) (PEI), and the targeting ligand folic acid in different combinations are internalized by epithelial cells in vitro and in vivo after oral gavage. Functionalized MSNs loaded with γ-secretase inhibitors of the Notch pathway, a key regulator of intestinal progenitor cells, colon cancer, and inflammation, demonstrated enhanced intestinal goblet cell differentiation as compared to free drug. Drug-loaded MSNs thus remained intact in vivo, further confirmed by exposure to simulated gastric and intestinal fluids in vitro. Drug targeting and efficacy in different parts of the intestine could be tuned by MSN surface modifications, with PEI coating exhibiting higher affinity for the small intestine and PEI–PEG coating for the colon. The data highlight the potential of nanomedicines for targeted delivery to distinct regions of the tissue for strict therapeutic control.
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Affiliation(s)
- Diti Desai
- Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland; Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland; Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland; Laboratory of Physical Chemistry, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
| | - Neeraj Prabhakar
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
| | - Veronika Mamaeva
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland; Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Didem Şen Karaman
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland; Laboratory of Physical Chemistry, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
| | - Iris A K Lähdeniemi
- Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland; Turku Center for Disease Modeling, Institute of Biomedicine, University of Turku, Turku, Finland
| | - Cecilia Sahlgren
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland; Department of Biomedical Engineering, Technical University of Eindhoven, Eindhoven, the Netherlands
| | - Jessica M Rosenholm
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland; Laboratory of Physical Chemistry, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
| | - Diana M Toivola
- Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland; Turku Center for Disease Modeling, Institute of Biomedicine, University of Turku, Turku, Finland
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Experimental cancer cachexia: Evolving strategies for getting closer to the human scenario. Semin Cell Dev Biol 2015; 54:20-7. [PMID: 26343953 DOI: 10.1016/j.semcdb.2015.09.002] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 09/02/2015] [Indexed: 01/22/2023]
Abstract
Cancer cachexia is a frequent syndrome that dramatically affects patient quality of life, anti-cancer treatment effectiveness, and overall survival. To date, no effective treatment is available and most of the studies are performed in experimental models in order to uncover the underlying mechanisms and to design prospective therapeutic strategies. This review summarizes the most relevant information regarding the use of animal models for studying cancer cachexia. Technical limitations and degree of recapitulation of the features of human cachexia are highlighted, in order to help investigators choose the most suitable model according to study-specific endpoints.
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Isaacs JT, Dalrymple SL, Rosen DM, Hammers H, Olsson A, Leanderson T. Anti-cancer potency of tasquinimod is enhanced via albumin-binding facilitating increased uptake in the tumor microenvironment. Oncotarget 2015; 5:8093-106. [PMID: 25193858 PMCID: PMC4226669 DOI: 10.18632/oncotarget.2378] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Tasquinimod, an orally active quinoline-3-carboxamide, binds with high affinity to HDAC4 and S100A9 in cancer and infiltrating host cells within compromised tumor microenvironment inhibiting adaptive survival pathways needed for an angiogenic response. Clinical trials document that as low as 0.5-1mg tasquinimod/day is therapeutic against castrate resistant metastatic prostate cancer. Tasquinimod is metabolized via cytochrome P4503A4, but ketoconazole at a dose which completely inhibits CYP3A metabolism does not affect tasquinimod's ability to inhibit endothelial “sprouting” in vitro or anti-cancer efficacy against human prostate cancer xenografts in vivo. Tasquinimod's potency is facilitated by its reversible binding (Kd < 35 μM) to the IIA subdomain of albumin (Sudlow's site I). As blood vessels within the compromised cancer microenvironment are characterized by a higher degree of leakiness than those in normal tissues, this results in an enhanced uptake of tasquinimod bound to albumin in cancer tissue via a tumor specific process known as the “enhanced permeability and retention” (i.e., EPR) effect. Thus, despite plasma levels of < 1 μM, the EPR effect results in intracellular drug concentrations of 2-3 μM, levels several-fold higher than needed for inhibition of endothelial sprouting (IC50 ~ 0.5 μM) or for inhibition of HDAC4 and S100A9 mediated tumor growth.
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Affiliation(s)
- John T Isaacs
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins ,Baltimore, MD; The Brady Urological Institute-Department of Urology, The Johns Hopkins University School of Medicine ,Baltimore, MD
| | - Susan L Dalrymple
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins ,Baltimore, MD
| | - D Marc Rosen
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins ,Baltimore, MD
| | - Hans Hammers
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins ,Baltimore, MD
| | | | - Tomas Leanderson
- Active Biotech, AB Lund, Sweden; Immunology group, Lund University, Sweden
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Jiang N, Leithold LHE, Post J, Ziehm T, Mauler J, Gremer L, Cremer M, Schartmann E, Shah NJ, Kutzsche J, Langen KJ, Breitkreutz J, Willbold D, Willuweit A. Preclinical Pharmacokinetic Studies of the Tritium Labelled D-Enantiomeric Peptide D3 Developed for the Treatment of Alzheimer´s Disease. PLoS One 2015; 10:e0128553. [PMID: 26046986 PMCID: PMC4457900 DOI: 10.1371/journal.pone.0128553] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 04/28/2015] [Indexed: 11/19/2022] Open
Abstract
Targeting toxic amyloid beta (Aβ) oligomers is currently a very attractive drug development strategy for treatment of Alzheimer´s disease. Using mirror-image phage display against Aβ1-42, we have previously identified the fully D-enantiomeric peptide D3, which is able to eliminate Aβ oligomers and has proven therapeutic potential in transgenic Alzheimer´s disease animal models. However, there is little information on the pharmacokinetic behaviour of D-enantiomeric peptides in general. Therefore, we conducted experiments with the tritium labelled D-peptide D3 (3H-D3) in mice with different administration routes to study its distribution in liver, kidney, brain, plasma and gastrointestinal tract, as well as its bioavailability by i.p. and p.o. administration. In addition, we investigated the metabolic stability in liver microsomes, mouse plasma, brain, liver and kidney homogenates, and estimated the plasma protein binding. Based on its high stability and long biological half-life, our pharmacokinetic results support the therapeutic potential of D-peptides in general, with D3 being a new promising drug candidate for Alzheimer´s disease treatment.
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Affiliation(s)
- Nan Jiang
- Structural Biochemistry, Institute of Complex Systems (ICS-6), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Leonie H. E. Leithold
- Structural Biochemistry, Institute of Complex Systems (ICS-6), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Julia Post
- Structural Biochemistry, Institute of Complex Systems (ICS-6), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Tamar Ziehm
- Structural Biochemistry, Institute of Complex Systems (ICS-6), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Jörg Mauler
- Medical Imaging Physics, Institute of Neuroscience and Medicine (INM-4), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Lothar Gremer
- Structural Biochemistry, Institute of Complex Systems (ICS-6), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Markus Cremer
- Structural and functional organisation of the brain, Institute of Neuroscience and Medicine (INM-1), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Elena Schartmann
- Structural Biochemistry, Institute of Complex Systems (ICS-6), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - N. Jon Shah
- Medical Imaging Physics, Institute of Neuroscience and Medicine (INM-4), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Janine Kutzsche
- Structural Biochemistry, Institute of Complex Systems (ICS-6), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Karl-Josef Langen
- Medical Imaging Physics, Institute of Neuroscience and Medicine (INM-4), Forschungszentrum Jülich GmbH, Jülich, Germany
- Department of Nuclear Medicine, Universitätsklinikum der RWTH Aachen, Aachen, Germany
| | - Jörg Breitkreutz
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - Dieter Willbold
- Structural Biochemistry, Institute of Complex Systems (ICS-6), Forschungszentrum Jülich GmbH, Jülich, Germany
- Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
- * E-mail: (DW); (AW)
| | - Antje Willuweit
- Medical Imaging Physics, Institute of Neuroscience and Medicine (INM-4), Forschungszentrum Jülich GmbH, Jülich, Germany
- * E-mail: (DW); (AW)
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Fu Y, Gerasimova M, Batz F, Kuczkowski A, Alam Y, Sanders PW, Ronzaud C, Hummler E, Vallon V. PPARγ agonist-induced fluid retention depends on αENaC expression in connecting tubules. Nephron Clin Pract 2014; 129:68-74. [PMID: 25531136 DOI: 10.1159/000370254] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 11/27/2014] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND/AIMS Thiazolidinediones (TZDs, like rosiglitazone (RGZ)) are peroxisome proliferator-activated receptor γ (PPARγ) agonists used to treat type 2 diabetes. Clinical limitations include TZD-induced fluid retention and body weight (BW) increase, which are inhibited by amiloride, an epithelial-sodium channel (ENaC) blocker. RGZ-induced fluid retention is maintained in mice with αENaC knockdown in the collecting duct (CD). Since ENaC in the connecting tubule (CNT) rather than in CD appears to be critical for normal NaCl retention, we aimed to further explore the role of ENaC in CNT in RGZ-induced fluid retention. METHODS Mice with conditional inactivation of αENaC in both CNT and CD were used (αENaC lox/lox AQP2-Cre; 'αENaC-CNT/CD-KO') and compared with littermate controls (αENaC lox/lox mice; 'WT'). BW was monitored and total body water (TBW) and extracellular fluid volume (ECF) were determined by bioelectrical impedance spectroscopy (BIS) before and after RGZ (320 mg/kg diet for 10 days). RESULTS On regular NaCl diet, αENaC-CNT/CD-KO had normal BW, TBW, ECF, hematocrit, and plasma Na(+), K(+), and creatinine, associated with an increase in plasma aldosterone compared with WT. Challenging αENaC-CNT/CD-KO with a low NaCl diet unmasked impaired NaCl and K homeostasis, consistent with effective knockdown of αENaC. In WT, RGZ increased BW (+6.1%), TBW (+8.4%) and ECF (+10%), consistent with fluid retention. These changes were significantly attenuated in αENaC-CNT/CD-KO (+3.4, 1.3, and 4.3%). CONCLUSION Together with the previous studies, the current results are consistent with a role of αENaC in CNT in RGZ-induced fluid retention, which dovetails with the physiological relevance of ENaC in this segment.
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Masuda T, Fu Y, Eguchi A, Czogalla J, Rose MA, Kuczkowski A, Gerasimova M, Feldstein AE, Scadeng M, Vallon V. Dipeptidyl peptidase IV inhibitor lowers PPARγ agonist-induced body weight gain by affecting food intake, fat mass, and beige/brown fat but not fluid retention. Am J Physiol Endocrinol Metab 2014; 306:E388-98. [PMID: 24347054 PMCID: PMC3923087 DOI: 10.1152/ajpendo.00124.2013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Peroxisome proliferator-activated receptor-γ (PPARγ) agonists like pioglitazone (PGZ) are effective antidiabetic drugs, but they induce fluid retention and body weight (BW) gain. Dipeptidyl peptidase IV (DPP IV) inhibitors are antidiabetic drugs that enhance renal Na(+) and fluid excretion. Therefore, we examined whether the DPP IV inhibitor alogliptin (ALG) ameliorates PGZ-induced BW gain. Male Sv129 mice were treated with vehicle (repelleted diet), PGZ (220 mg/kg diet), ALG (300 mg/kg diet), or a combination of PGZ and ALG (PGZ + ALG) for 14 days. PGZ + ALG prevented the increase in BW observed with PGZ but did not attenuate the increase in body fluid content determined by bioimpedance spectroscopy (BIS). BIS revealed that ALG alone had no effect on fat mass (FM) but enhanced the FM-lowering effect of PGZ; MRI analysis confirmed the latter and showed reductions in visceral and inguinal subcutaneous (sc) white adipose tissue (WAT). ALG but not PGZ decreased food intake and plasma free fatty acid concentrations. Conversely, PGZ but not ALG increased mRNA expression of thermogenesis mediator uncoupling protein 1 in epididymal WAT. Adding ALG to PGZ treatment increased the abundance of multilocular cell islets in sc WAT, and PGZ + ALG increased the expression of brown-fat-like "beige" cell marker TMEM26 in sc WAT and interscapular brown adipose tissue and increased rectal temperature vs. vehicle. In summary, DPP IV inhibition did not attenuate PPARγ agonist-induced fluid retention but prevented BW gain by reducing FM. This involved ALG inhibition of food intake and was associated with food intake-independent synergistic effects of PPARγ agonism and DPP-IV inhibition on beige/brown fat cells and thermogenesis.
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Ridner SH, Bonner CM, Doersam JK, Rhoten BA, Schultze B, Dietrich MS. Bioelectrical impedance self-measurement protocol development and daily variation between healthy volunteers and breast cancer survivors with lymphedema. Lymphat Res Biol 2014; 12:2-9. [PMID: 24502422 DOI: 10.1089/lrb.2013.0020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND A significant percentage of breast cancer survivors are at risk for lymphedema for which lifelong self-care is required. Previous studies suggest that less than 50% of breast cancer survivors with lymphedema (BCS-LE) perform prescribed self-care tasks and that even wearing a compression sleeve, the most commonly reported self-care activity, is done irregularly. Reasons for poor self-care adherence include perceived lack of results from self-care (no available arm volume data) and perceived inability to manage the condition. METHODS AND RESULTS A two-part pilot study was conducted to: 1) develop and determine the feasibility of a self-measurement protocol using a single frequency bioelectrical impedance device; and 2) examine daily variation in extracellular volume in healthy and lymphedematous limbs. Healthy and BCS-LE volunteers were recruited to refine and test a self-measurement protocol. Volunteers were trained in the use of the device and measured for 5 consecutive days in a laboratory setting. They were then given the device to use at home for an additional 5 consecutive days of self-measurement. All volunteers completed each scheduled home measurement. Daily variability in both groups was noted. CONCLUSIONS Home self-measurement using bioelectrical impedance is feasible, acceptable, and captures change. This has implications for both self-care support and for the possibility of incorporating self-measurement using bioelectrical impedance in future clinical trials examining effectiveness of lymphedema treatment.
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Affiliation(s)
- Sheila H Ridner
- 1 School of Nursing, Vanderbilt University , Nashville, Tennessee
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Lee ML, Fung SY, Chung I, Pailoor J, Cheah SH, Tan NH. King cobra (Ophiophagus hannah) venom L-amino acid oxidase induces apoptosis in PC-3 cells and suppresses PC-3 solid tumor growth in a tumor xenograft mouse model. Int J Med Sci 2014; 11:593-601. [PMID: 24782648 PMCID: PMC4003544 DOI: 10.7150/ijms.8096] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Accepted: 02/27/2014] [Indexed: 11/05/2022] Open
Abstract
King cobra (Ophiophagus hannah) venom L-amino acid oxidase (OH-LAAO), a heat stable enzyme, has been shown to exhibit very potent anti-proliferative activity against human breast and lung tumorigenic cells but not in their non-tumorigenic counterparts. We further examine its in vitro and in vivo anti-tumor activity in a human prostate adenocarcinoma (PC-3) model. OH-LAAO demonstrated potent cytotoxicity against PC-3 cells with IC50 of 0.05 µg/mL after 72 h incubation in vitro. It induced apoptosis as evidenced with an increase in caspase-3/7 cleavages and an increase in annexin V-stained cells. To examine its in vivo anti-tumor activity, we treated PC-3 tumor xenograft implanted subcutaneously in immunodeficient NU/NU (nude) mice with 1 µg/g OH-LAAO given intraperitoneally (i.p.). After 8 weeks of treatment, OH-LAAO treated PC-3 tumors were markedly inhibited, when compared to the control group (P <0.05). TUNEL staining analysis on the tumor sections showed a significantly increase of apoptotic cells in the LAAO-treated animals. Histological examinations of the vital organs in these two groups showed no significant differences with normal tissues, indicating no obvious tissue damage. The treatment also did not cause any significant changes on the body weight of the mice during the duration of the study. These observations suggest that OH-LAAO cytotoxic effects may be specific to tumor xenografts and less to normal organs. Given its potent anti-tumor activities shown in vitro as well as in vivo, the king cobra venom LAAO can potentially be developed to treat prostate cancer and other solid tumors.
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Affiliation(s)
- Mui Li Lee
- 1. CENAR and Department of Molecular Medicine
| | | | | | | | - Swee Hung Cheah
- 4. Department of Physiology; Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Madan D, Ferguson CG, Lee WY, Prestwich GD, Testa CA. Non-invasive imaging of tumors by monitoring autotaxin activity using an enzyme-activated near-infrared fluorogenic substrate. PLoS One 2013; 8:e79065. [PMID: 24278115 PMCID: PMC3835791 DOI: 10.1371/journal.pone.0079065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 09/23/2013] [Indexed: 01/10/2023] Open
Abstract
Autotaxin (ATX), an autocrine motility factor that is highly upregulated in metastatic cancer, is a lysophospholipase D enzyme that produces the lipid second messenger lysophosphatidic acid (LPA) from lysophosphatidylcholine (LPC). Dysregulation of the lysolipid signaling pathway is central to the pathophysiology of numerous cancers, idiopathic pulmonary fibrosis, rheumatoid arthritis, and other inflammatory diseases. Consequently, the ATX/LPA pathway has emerged as an important source of biomarkers and therapeutic targets. Herein we describe development and validation of a fluorogenic analog of LPC (AR-2) that enables visualization of ATX activity in vivo. AR-2 exhibits minimal fluorescence until it is activated by ATX, which substantially increases fluorescence in the near-infrared (NIR) region, the optimal spectral window for in vivo imaging. In mice with orthotopic ATX-expressing breast cancer tumors, ATX activated AR-2 fluorescence. Administration of AR-2 to tumor-bearing mice showed high fluorescence in the tumor and low fluorescence in most healthy tissues with tumor fluorescence correlated with ATX levels. Pretreatment of mice with an ATX inhibitor selectively decreased fluorescence in the tumor. Together these data suggest that fluorescence directly correlates with ATX activity and its tissue expression. The data show that AR-2 is a non-invasive and selective tool that enables visualization and quantitation of ATX-expressing tumors and monitoring ATX activity in vivo.
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Affiliation(s)
- Damian Madan
- Echelon Biosciences Inc., Salt Lake City, Utah, United States of America
- * E-mail: (DM); (CT)
| | - Colin G. Ferguson
- Echelon Biosciences Inc., Salt Lake City, Utah, United States of America
| | - Won Yong Lee
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah, United States of America
| | - Glenn D. Prestwich
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah, United States of America
| | - Charles A. Testa
- Echelon Biosciences Inc., Salt Lake City, Utah, United States of America
- * E-mail: (DM); (CT)
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Stuart D, Chapman M, Rees S, Woodward S, Kohan DE. Myocardial, smooth muscle, nephron, and collecting duct gene targeting reveals the organ sites of endothelin A receptor antagonist fluid retention. J Pharmacol Exp Ther 2013; 346:182-9. [PMID: 23709116 DOI: 10.1124/jpet.113.205286] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Endothelin-1 binding to endothelin A receptors (ETA) elicits profibrogenic, proinflammatory, and proliferative effects that can promote a wide variety of diseases. Although ETA antagonists are approved for the treatment of pulmonary hypertension, their clinical utility in several other diseases has been limited by fluid retention. ETA blocker-induced fluid retention could be due to inhibition of ETA activation in the heart, vasculature, and/or kidney; consequently, the current study was designed to define which of these sites are involved. Mice were generated with absence of ETA specifically in cardiomyocytes (heart), smooth muscle, the nephron, the collecting duct, or no deletion (control). Administration of the ETA antagonist ambrisentan or atrasentan for 2 weeks caused fluid retention in control mice on a high-salt diet as assessed by increases in body weight, total body water, and extracellular fluid volume (using impedance plethysmography), as well as decreases in hematocrit (hemodilution). Mice with heart ETA knockout retained fluid in a similar manner as controls when treated with ambrisentan or atrasentan. Mice with smooth muscle ETA knockout had substantially reduced fluid retention in response to either ETA antagonist. Mice with nephron or collecting duct ETA disruption were completely prevented from ETA blocker-induced fluid retention. Taken together, these findings suggest that ETA antagonist-induced fluid retention is due to a direct effect of this class of drug on the collecting duct, is partially related to the vascular action of the drugs, and is not due to alterations in cardiac function.
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Affiliation(s)
- Deborah Stuart
- Division of Nephrology, University of Utah Health Sciences Center, Salt Lake City, UT 84132, USA
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Lee E, Son JE, Byun S, Lee SJ, Kim YA, Liu K, Kim J, Lim SS, Park JHY, Dong Z, Lee KW, Lee HJ. CDK2 and mTOR are direct molecular targets of isoangustone A in the suppression of human prostate cancer cell growth. Toxicol Appl Pharmacol 2013; 272:12-20. [PMID: 23707764 DOI: 10.1016/j.taap.2013.04.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Revised: 04/15/2013] [Accepted: 04/16/2013] [Indexed: 01/06/2023]
Abstract
Licorice extract which is used as a natural sweetener has been shown to possess inhibitory effects against prostate cancer, but the mechanisms responsible are poorly understood. Here, we report a compound, isoangustone A (IAA) in licorice that potently suppresses the growth of aggressive prostate cancer and sought to clarify its mechanism of action. We analyzed its inhibitory effects on the growth of PTEN-deleted human prostate cancer cells, in vitro and in vivo. Administration of IAA significantly attenuated the growth of prostate cancer cell cultures and xenograft tumors. These effects were found to be attributable to inhibition of the G1/S phase cell cycle transition and the accumulation of p27(kip1). The elevated p27(kip1) expression levels were concurrent with the decrease of its phosphorylation at threonine 187 through suppression of CDK2 kinase activity and the reduced phosphorylation of Akt at Serine 473 by diminishing the kinase activity of the mammalian target of rapamycin (mTOR). Further analysis using recombinant proteins and immunoprecipitated cell lysates determined that IAA exerts suppressive effects against CDK2 and mTOR kinase activity by direct binding with both proteins. These findings suggested that the licorice compound IAA is a potent molecular inhibitor of CDK2 and mTOR, with strong implications for the treatment of prostate cancer. Thus, licorice-derived extracts with high IAA content warrant further clinical investigation for nutritional sources for prostate cancer patients.
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Affiliation(s)
- Eunjung Lee
- WCU Biomodulation Major, Department of Agricultural Biotechnology and Center for Food and Bioconvergence, Seoul National University, Seoul 151-921, Republic of Korea
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Sorensen MV, Grossmann S, Roesinger M, Gresko N, Todkar AP, Barmettler G, Ziegler U, Odermatt A, Loffing-Cueni D, Loffing J. Rapid dephosphorylation of the renal sodium chloride cotransporter in response to oral potassium intake in mice. Kidney Int 2013; 83:811-24. [DOI: 10.1038/ki.2013.14] [Citation(s) in RCA: 241] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Stuart D, Rees S, Woodward SK, Koesters R, Strait KA, Kohan DE. Disruption of the endothelin A receptor in the nephron causes mild fluid volume expansion. BMC Nephrol 2012; 13:166. [PMID: 23217151 PMCID: PMC3537641 DOI: 10.1186/1471-2369-13-166] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Accepted: 11/27/2012] [Indexed: 11/10/2022] Open
Abstract
Background Endothelin, via endothelin A receptors (ETA), exerts multiple pathologic effects that contribute to disease pathogenesis throughout the body. ETA antagonists ameliorate many experimental diseases and have been extensively utilized in clinical trials. The utility of ETA blockers has been greatly limited, however, by fluid retention, sometimes leading to heart failure or death. To begin to examine this issue, the effect of genetic disruption of ETA in the nephron on blood pressure and salt handling was determined. Methods Mice were generated with doxycycline-inducible nephron-specific ETA deletion using Pax8-rtTA and LC-1 transgenes on the background of homozygous loxP-flanked ETA alleles. Arterial pressure, Na metabolism and measures of body fluid volume status (hematocrit and impedance plethysmography) were assessed. Results Absence of nephron ETA did not alter arterial pressure whether mice were ingesting a normal or high Na diet. Nephron ETA disruption did not detectably affect 24 hr Na excretion or urine volume regardless of Na intake. However, mice with nephron ETA knockout that were fed a high Na diet had mild fluid retention as evidenced by an increase in body weight and a fall in hematocrit. Conclusions Genetic deletion of nephron ETA causes very modest fluid retention that does not alter arterial pressure. Nephron ETA, under normal conditions, likely do not play a major role in regulation of Na excretion or systemic hemodynamics.
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Affiliation(s)
- Deborah Stuart
- Division of Nephrology, University of Utah Health Sciences Center, 1900 East 30 North, Salt Lake City, UT 84132, USA
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Kulcsár G, Gaál D, Kulcsár PI, Schulcz Á, Czömpöly T. A mixture of amino acids and other small molecules present in the serum suppresses the growth of murine and human tumors in vivo. Int J Cancer 2012; 132:1213-21. [PMID: 22858865 PMCID: PMC3562491 DOI: 10.1002/ijc.27756] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 07/02/2012] [Accepted: 07/09/2012] [Indexed: 11/23/2022]
Abstract
Previously we have hypothesized that the small molecules which are selectively accumulated in cancer cells might participate in a non-immunological antitumor surveillance mechanism. We demonstrated earlier that a mixture of experimentally selected substances (“active mixture”, AM: l-arginine, l-histidine, l-methionine, l-phenylalanine, l-tyrosine, l-tryptophan, l-ascorbate, d-biotin, pyridoxine, riboflavin, adenine, l(-)malate) possesses a selective toxic effect in vitro on a variety of tumor cell lines, and we have shown that the AM selectively induces apoptosis of cancer cells in vitro. To explore the in vivo significance of our earlier findings we examined the antitumor effect of AM in Colon 26 murine colorectal adenocarcinoma, B16 murine melanoma, MXT murine mammary carcinoma, S180 murine sarcoma, P388 murine lymphoid leukemia, HL-60 human promyeloid leukemia, PC-3 human prostate carcinoma, and HT-29 human colon carcinoma tumor models. Treatment of tumor bearing mice with AM inhibited the growth of the tumors investigated, with an inhibitory effect ranging from 40 to 69%. The AM had a comparable antitumor effect with 5-fluorouracil and cisplatin in the Colon-26 tumor model, and combined treatment with AM and 5-fluorouracil or cisplatin resulted in an enhanced tumor growth inhibitory effect. The AM induced apoptosis through the mitochondrial pathway and induced G1 arrest in PC-3 cells and increased the number of apoptotic cells in PC-3 xenografts. These findings suggest that the AM might offer an interesting perspective in the treatment of cancer and in combination with other treatments may offer hope for a more effective cancer therapy.
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Affiliation(s)
- Gyula Kulcsár
- Immunal Ltd., Cancer Research and Product Development Laboratory, H-7630 Pécs, Finn u. 1/1., Hungary.
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