1
|
Delgado JM, Klein PS, Varma S. ATP-Ion Complexation and Lithium's Bioactive Form in Cellular Solutions. J Am Chem Soc 2025. [PMID: 40405352 DOI: 10.1021/jacs.5c04061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2025]
Abstract
Lithium (Li+) is a first-line therapy for millions of people with bipolar disorder. However, the molecular mechanism underlying Li+'s action remains unclear. Here we resolve a key issue concerning its bioactive form that is central to all hypotheses proposed to explain its therapeutic action─under cellular conditions, it is unclear as to what fraction of Li+ is free vs bound to ATP. We address this using molecular dynamics (MD) simulations and kinetic modeling. The polarizable force field (AMOEBA-HFC) employed in MD is benchmarked against quantum mechanical and experimental data, including local ion-ligand interactions, aqueous phase ion properties, and ion-ATP binding free energies. The kinetic model is built using observations from MD and parametrized using MD and experimental data. We discover that Mg2+-bound ATP (ATP·Mg) has two binding sites for monovalent cations, and both sites can be loaded simultaneously. In Li+'s absence, ATP·Mg predominantly exists as a ternary or quaternary complex with Na+ and/or K+ ions. Li+ also competes for these two sites. Although its standard affinity is stronger than Na+ and K+, its loading its limited by its low therapeutic concentration. Nevertheless, the extent of Li+ loading increases with ATP levels, and 50% of Li+ can be sequestered by ATP·Mg at physiological extremes. This means that both Li+ forms can be present in high fractions, providing a basis to investigate molecular modes of Li+ action. Overall, our work provides new structural, thermodynamic, and kinetic insights into how ATP binds ions in cellular solutions, also revealing Li's bioactive form.
Collapse
Affiliation(s)
- Julian M Delgado
- Department of Molecular Biosciences, University of South Florida, 4202 E. Fowler Ave., Tampa FL-33620, United States
| | - Peter S Klein
- Department of Medicine, Division of Hematology-Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Sameer Varma
- Department of Molecular Biosciences, University of South Florida, 4202 E. Fowler Ave., Tampa FL-33620, United States
- Department of Physics, University of South Florida, 4202 E. Fowler Ave., Tampa FL-33620, United States
| |
Collapse
|
2
|
Jans K, Jöckel T, von Frieling J, Ipharraguerre IR, Roeder T, Lüersen K, Rimbach G. Lithium affects sodium balance but not intestinal microbiota - studies in Drosophila melanogaster. J Trace Elem Med Biol 2024; 86:127548. [PMID: 39442469 DOI: 10.1016/j.jtemb.2024.127548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2024] [Revised: 10/09/2024] [Accepted: 10/09/2024] [Indexed: 10/25/2024]
Abstract
BACKGROUND The trace element lithium (Li) is known for its therapeutic mood-stabilizing application in humans, but also for its various bioactivities, which have been uncovered in model organisms. According to the literature, Li may interfere with the homeostasis of other minerals in mammals, namely sodium, calcium and magnesium. In addition, Li was found to influence the composition and diversity of the intestinal microbiota in vertebrates, an observation that may be related to the many bioactivities of Li. METHODS Based on these previous findings, we employed the model organism Drosophila melanogaster to decipher whether Li exhibits similar bioactivities in invertebrates. First, we examined the influence of increasing dietary Li supply (0 -100 mM LiCl) on the status of Li and ten other minerals via Inductively coupled plasma - mass spectrometry (ICP-MS) in heads and remaining body parts of the three wildtype strains w1118, Oregon-R-C and Canton-S. In addition, we investigated the potential impact of Li feeding (0, 0.1, 1 mM LiCl) on the total bacterial load, α- and β-diversity via real-time quantitative polymerase chain reaction (RT q-PCR) and 16S rDNA sequencing in the intestines of female w1118. RESULTS Our observations revealed that Li accumulates linearly in both sexes and all body parts of the three Drosophila strains as the dietary Li supply increases. While the status of most elements remained unchanged, the sodium levels of the fly also correlated positively with the Li content of the diet. The intestinal microbiota, however, remained largely unaffected by Li feeding in terms of both, bacterial load and diversity. CONCLUSION These findings support the hypothesis that elevating the Li supply affects sodium homeostasis in Drosophila, a finding coherent with observations in mammals. Furthermore, our data opposes a possible involvement of the bacterial intestinal colonization in the bioactivity of Li in Drosophila.
Collapse
Affiliation(s)
- Katharina Jans
- Division of Food Science, Institute of Human Nutrition and Food Science, University of Kiel, Kiel D-24118, Germany.
| | - Tobias Jöckel
- Division of Food Science, Institute of Human Nutrition and Food Science, University of Kiel, Kiel D-24118, Germany
| | - Jakob von Frieling
- Division of Molecular Physiology, Institute of Zoology, University of Kiel, Kiel D-24118, Germany
| | - Ignacio R Ipharraguerre
- Division of Food Science, Institute of Human Nutrition and Food Science, University of Kiel, Kiel D-24118, Germany
| | - Thomas Roeder
- Division of Molecular Physiology, Institute of Zoology, University of Kiel, Kiel D-24118, Germany
| | - Kai Lüersen
- Division of Food Science, Institute of Human Nutrition and Food Science, University of Kiel, Kiel D-24118, Germany
| | - Gerald Rimbach
- Division of Food Science, Institute of Human Nutrition and Food Science, University of Kiel, Kiel D-24118, Germany
| |
Collapse
|
3
|
McGhee C, Yang Z, Guo W, Wu Y, Lyu M, DeLong CJ, Hong S, Ma Y, McInnis MG, O’Shea KS, Lu Y. DNAzyme-Based Lithium-Selective Imaging Reveals Higher Lithium Accumulation in Bipolar Disorder Patient-Derived Neurons. ACS CENTRAL SCIENCE 2021; 7:1809-1820. [PMID: 34841055 PMCID: PMC8614110 DOI: 10.1021/acscentsci.1c00843] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Indexed: 05/16/2023]
Abstract
Lithium has been a drug for bipolar disorders (BD) for over 70 years; however, its usage has been limited by its narrow therapeutic window (between 0.6 and 1.2 mM). Understanding the cellular distribution of lithium ions (Li+) in patient cells will offer deep insight into this limitation, but selective imaging of Li+ in living cells under biomedically relevant concentration ranges has not been achieved. Herein, we report in vitro selection and development of a Li+-specific DNAzyme fluorescent sensor with >100-fold selectivity over other biorelevant metal ions. This sensor allows comparative Li+ visualization in HeLa cells, human neuronal progenitor cells (NPCs), and neurons derived from BD patients and healthy controls. Strikingly, we detected enhanced accumulation of Li+ in cells derived from BD patients compared with healthy controls in differentiated neurons but not NPCs. These results establish the DNAzyme-based sensor as a novel platform for biomedical research into BD and related areas using lithium drugs.
Collapse
Affiliation(s)
- Claire
E. McGhee
- Department
of Chemistry, University of Illinois at
Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Zhenglin Yang
- Department
of Biochemistry, University of Illinois
at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Weijie Guo
- Department
of Biochemistry, University of Illinois
at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Yuting Wu
- Department
of Chemistry, University of Illinois at
Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Mingkuan Lyu
- Department
of Chemistry, University of Illinois at
Urbana-Champaign, Urbana, Illinois 61801, United States
- Center
for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Cynthia J. DeLong
- Department
of Cell and Developmental Biology, The University
of Michigan, Ann Arbor 48109, United States
| | - Shanni Hong
- Department
of Chemistry, University of Illinois at
Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Yuan Ma
- Department
of Chemistry, University of Illinois at
Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Melvin G. McInnis
- Department
of Psychiatry, The University of Michigan, Ann Arbor 48109, United States
| | - K. Sue O’Shea
- Department
of Cell and Developmental Biology, The University
of Michigan, Ann Arbor 48109, United States
- Department
of Psychiatry, The University of Michigan, Ann Arbor 48109, United States
| | - Yi Lu
- Department
of Chemistry, University of Illinois at
Urbana-Champaign, Urbana, Illinois 61801, United States
- Department
of Biochemistry, University of Illinois
at Urbana-Champaign, Urbana, Illinois 61801, United States
- Center
for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| |
Collapse
|
4
|
Uwai Y, Nabekura T. Surveillance of drug overdose and identification of its risk factors by a multivariate analysis using the Japanese Adverse Drug Event Report database. Asian J Psychiatr 2021; 65:102826. [PMID: 34500391 DOI: 10.1016/j.ajp.2021.102826] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/04/2021] [Accepted: 08/29/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Limited information is currently available on drug overdose in Japan. Therefore, the present study examined drug overdose using the Japanese Adverse Drug Event Report (JADER) database. METHODS The records of drug overdose in patients were extracted from the JADER database. Risk factors for drug overdose in patients with bipolar disorders were examined using a multiple logistic regression analysis. RESULTS Overdoses of 1327 medicines in 784 patients were registered in the JADER database. An overdose of lithium carbonate was the most frequently reported in 144 patients, followed by zolpidem tartrate in 88, and then quetiapine fumarate, sodium valproate, risperidone, and paroxetine hydrochloride hydrate. The number of overdoses was higher in females, and peaked in patients aged with 30-39 years. The dosages of overdosed lithium carbonate ranged between 1800 and 60,000 mg, with a median of 8400 mg, while those of overdosed zolpidem tartrate ranged between 15 and 600 mg, with a median of 105 mg. Forty-one drug overdose cases were registered in 3521 patients with bipolar disorder, bipolar I disorder, or bipolar II disorder in the JADER database. A multivariate analysis of these cases identified female sex, an age younger than 50 years, and the use of lithium carbonate as risk factors for drug overdose. Lamotrigine reduced its odds, and no relationship was observed with aripiprazole or sodium valproate. CONCLUSION The present study represented a surveillance of drug overdose, and identified risk factors in patients with bipolar disorders by a multivariate analysis using the JADER database.
Collapse
Affiliation(s)
- Yuichi Uwai
- School of Pharmacy, Aichi Gakuin University, Nagoya, Japan.
| | | |
Collapse
|
5
|
Uwai Y, Yamaguchi R, Nabekura T. Analysis of sex difference in the tubular reabsorption of lithium in rats. Physiol Res 2021; 70:655-659. [PMID: 34062068 PMCID: PMC8820543 DOI: 10.33549/physiolres.934568] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 04/22/2021] [Indexed: 11/25/2022] Open
Abstract
Lithium is used in the treatment of bipolar disorder. We previously demonstrated that two types of transporters mediate the tubular reabsorption of lithium in rats, and suggested that sodium-dependent phosphate transporters play a role in lithium reabsorption with high affinity. In the present study, we examined sex differences in lithium reabsorption in rats. When lithium chloride was infused at 60 µg/min, creatinine clearance and the renal clearance of lithium were lower, and the plasma concentration of lithium was higher in female rats. These values reflected the higher fractional reabsorption of lithium in female rats. In rats infused with lithium chloride at 6 µg/min, the pharmacokinetic parameters of lithium examined were all similar in both sexes. The fractional reabsorption of lithium was decreased by foscarnet, a representative inhibitor of sodium-dependent phosphate transporters, in male and female rats when lithium chloride was infused at the low rate. Among the candidate transporters mediating lithium reabsorption examined herein, the mRNA expression of only PiT2, a sodium-dependent phosphate transporter, exhibited sexual dimorphism. The present results demonstrated sex differences in the tubular reabsorption of lithium with low affinity in rats.
Collapse
Affiliation(s)
- Y Uwai
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan.
| | | | | |
Collapse
|
6
|
Lithium in Portuguese Bottled Natural Mineral Waters-Potential for Health Benefits? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17228369. [PMID: 33198207 PMCID: PMC7696288 DOI: 10.3390/ijerph17228369] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 10/23/2020] [Accepted: 11/08/2020] [Indexed: 11/17/2022]
Abstract
There is increasing epidemiologic and experimental evidence that lithium (Li) exhibits significant health benefits, even at concentrations lower than the therapeutic oral doses prescribed as treatment for mental disorders. The aim of this study is to determine the content of Li in 18 brands of bottled natural mineral waters that are available on the Portuguese market and from which the sources are found within the Portuguese territory, to provide data for Li intake from drinking water. Analyses of Li were performed by inductively coupled plasma-mass spectrometry. The results indicate highly different Li concentrations in natural mineral waters: one group with low Li concentrations (up to 11 µg Li/L) and a second group with Li concentrations higher than 100 µg/L. The highest Li concentrations (>1500 µg Li/L) were observed in the highly mineralized Na-HCO3 type waters that are naturally carbonated (>250 mg/L free CO2). As a highly bioavailable source for Li dietary intake these natural mineral waters have potential for Li health benefits but should be consumed in a controlled manner due to its Na and F− contents. The consumption of as little as 0.25 L/day of Vidago natural mineral water (2220 µg Li/L), can contribute up to 50% of the proposed daily requirement of 1 mg Li/day for an adult (70 kg body weight). In future, Li epidemiological studies that concern the potential Li effect or health benefits from Li in drinking water should consider not only the Li intake from tap water but also intake from natural mineral water that is consumed in order to adjust the Li intake of the subjects.
Collapse
|
7
|
Uwai Y, Kondo R, Suzuki T, Kawasaki T, Nabekura T. Potent Inhibition of Biphasic Tubular Reabsorption of Lithium by Acetazolamide and Foscarnet in Rats. Physiol Res 2020; 69:645-651. [PMID: 32584131 DOI: 10.33549/physiolres.934285] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Lithium is mainly excreted into urine, and a large fraction of lithium filtered through glomeruli is reabsorbed in the proximal tubule. However, the mechanisms responsible for lithium reabsorption remain unclear. We previously reported that the reabsorption of lithium was biphasic in rats, and that foscarnet inhibited lithium reabsorption with a high affinity type. We herein evaluated the effects of acetazolamide and foscarnet on the renal excretion of lithium in rats treated with lithium chloride at 2 doses. In rats intravenously injected with a bolus of 25 mg/kg lithium chloride, acetazolamide facilitated the urinary excretion of lithium, and increased the fractional excretion of lithium from 0.446 to 0.953, near the theoretically maximum value. At a dose of 2.5 mg/kg lithium chloride, the fractional excretion of lithium was 0.241 in control rats, 0.420 in rats administered acetazolamide, and 0.976 in rats administered acetazolamide and foscarnet. These results showed the potent inhibition of lithium reabsorption by acetazolamide and foscarnet in rats. And, it was exhibited that the effects of acetazolamide on lithium reabsorption differed with the dosages of lithium administered.
Collapse
Affiliation(s)
- Y Uwai
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Kusumoto, Chikusa, Nagoya, Japan.
| | | | | | | | | |
Collapse
|
8
|
Lithium Content of 160 Beverages and Its Impact on Lithium Status in Drosophila melanogaster. Foods 2020; 9:foods9060795. [PMID: 32560287 PMCID: PMC7353479 DOI: 10.3390/foods9060795] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/06/2020] [Accepted: 06/11/2020] [Indexed: 11/17/2022] Open
Abstract
Lithium (Li) is an important micronutrient in human nutrition, although its exact molecular function as a potential essential trace element has not yet been fully elucidated. It has been previously shown that several mineral waters are rich and highly bioavailable sources of Li for human consumption. Nevertheless, little is known about the extent in which other beverages contribute to the dietary Li supply. To this end, the Li content of 160 different beverages comprising wine and beer, soft and energy drinks and tea and coffee infusions was analysed by inductively coupled plasma mass spectrometry (ICP-MS). Furthermore, a feeding study in Drosophila melanogaster was conducted to test whether Li derived from selected beverages changes Li status in flies. In comparison to the average Li concentration in mineral waters (108 µg/L; reference value), the Li concentration in wine (11.6 ± 1.97 µg/L) and beer (8.5 ± 0.77 µg/L), soft and energy drinks (10.2 ± 2.95 µg/L), tea (2.8 ± 0.65 µg/L) and coffee (0.1 ± 0.02 µg/L) infusions was considerably lower. Only Li-rich mineral water (~1600 µg/L) significantly increased Li concentrations in male and female flies. Unlike mineral water, most wine and beer, soft and energy drink and tea and coffee samples were rather Li-poor food items and thus may only contribute to a moderate extent to the dietary Li supply. A novelty of this study is that it relates analytical Li concentrations in beverages to Li whole body retention in Drosophila melanogaster.
Collapse
|
9
|
Seidel U, Baumhof E, Hägele FA, Bosy-Westphal A, Birringer M, Rimbach G. Lithium-Rich Mineral Water is a Highly Bioavailable Lithium Source for Human Consumption. Mol Nutr Food Res 2019; 63:e1900039. [PMID: 31051049 DOI: 10.1002/mnfr.201900039] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/27/2019] [Indexed: 01/24/2023]
Abstract
SCOPE Lithium is an important trace element in human nutrition and medicine. Mineral and medicinal waters may represent a significant source of dietary lithium intake. METHODS AND RESULTS The lithium concentration of 360 German mineral and 21 medicinal waters is determined. Based on a systematic screening, three different mineral waters exhibiting low (1.7 µg L-1 ), medium (171 µg L-1 ), and high lithium (1724 µg L-1 ) concentrations are chosen for an acute bioavailability study in male healthy volunteers. In Germany, a north-east to south-west gradient of analyzed lithium concentrations is observed in the 381 tested waters. The lithium concentration in the water is significantly correlated with its sodium (r = 0. 810), potassium (r = 0.716), and magnesium (r = 0.361), but not with its calcium concentration. In a randomized cross-over trial, volunteers (n = 3×10 each) drink 1.5 L of the respective mineral waters, and lithium concentrations in serum and urine are monitored over 24 h. Consumption of the mineral waters with a medium and high lithium content results in a dose-dependent response in serum lithium concentrations and total urinary lithium excretion. CONCLUSION Lithium-rich mineral and medicinal waters may be an important and highly bioavailable lithium source for human consumption.
Collapse
Affiliation(s)
- Ulrike Seidel
- Kiel University, Institute of Human Nutrition and Food Science, Devision of Food Science, 24118, Kiel, Germany
| | - Elena Baumhof
- Kiel University, Institute of Human Nutrition and Food Science, Devision of Food Science, 24118, Kiel, Germany
| | - Franziska A Hägele
- Kiel University, Institute of Human Nutrition and Food Science, Devision of Food Science, 24118, Kiel, Germany
| | - Anja Bosy-Westphal
- Kiel University, Institute of Human Nutrition and Food Science, Devision of Food Science, 24118, Kiel, Germany
| | - Marc Birringer
- Fulda University of Applied Science, Devision of Nutritional, Food and Consumer Science, 36037, Fulda, Germany
| | - Gerald Rimbach
- Kiel University, Institute of Human Nutrition and Food Science, Devision of Food Science, 24118, Kiel, Germany
| |
Collapse
|
10
|
Pickard BS. Genomics of Lithium Action and Response. FOCUS (AMERICAN PSYCHIATRIC PUBLISHING) 2019; 17:308-313. [PMID: 32015722 PMCID: PMC6996056 DOI: 10.1176/appi.focus.17305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
(Reprinted with permission from Neurotherapeutics (2017) 14:582-587).
Collapse
|
11
|
Thomas L, Xue J, Dominguez Rieg JA, Rieg T. Contribution of NHE3 and dietary phosphate to lithium pharmacokinetics. Eur J Pharm Sci 2018; 128:1-7. [PMID: 30419292 DOI: 10.1016/j.ejps.2018.11.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 10/09/2018] [Accepted: 11/08/2018] [Indexed: 01/13/2023]
Abstract
Lithium is one of the mainstays for the treatment of bipolar disorder despite its side effects on the endocrine, neurological, and renal systems. Experimentally, lithium has been used as a measure to determine proximal tubule reabsorption based on the assumption that lithium and sodium transport go in parallel in the proximal tubule. However, the exact mechanism by which lithium is reabsorbed remains elusive. The majority of proximal tubule sodium reabsorption is directly or indirectly mediated by the sodium-hydrogen exchanger 3 (NHE3). In addition, sodium-phosphate cotransporters have been implicated in renal lithium reabsorption. In order to better understand the role of sodium-phosphate cotransporters involved in lithium (re)absorption, we studied lithium pharmacokinetics in: i) tubule-specific NHE3 knockout mice (NHE3loxloxPax8Cre), and ii) mice challenged with low or high phosphate diets. Intravenous or oral administration of lithium did not result in differences in lithium bioavailability, half-life, maximum plasma concentrations, area under the curve, lithium clearance, or urinary lithium/creatinine ratios between control and NHE3loxloxPax8Cre mice. After one week of dietary phosphate challenges, lithium bioavailability was ~30% lower on low versus high dietary phosphate, possibly the consequence of a smaller area under the curve after oral administration. This was associated with higher apparent lithium clearance after oral administration and lower urinary lithium/creatinine ratios on low versus high dietary phosphate. Collectively, renal NHE3 does not play a role in lithium pharmacokinetics; however, dietary phosphate could have an indirect effect on lithium bioavailability and lithium disposition.
Collapse
Affiliation(s)
- Linto Thomas
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL 33612, USA
| | - Jianxiang Xue
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL 33612, USA
| | - Jessica A Dominguez Rieg
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL 33612, USA
| | - Timo Rieg
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL 33612, USA.
| |
Collapse
|
12
|
Uwai Y, Suzuki T, Kondo R, Kawasaki T, Nabekura T. Effect of renal ischemia on urinary excretion of lithium in rats. Biopharm Drug Dispos 2018; 39:448-451. [PMID: 30393876 DOI: 10.1002/bdd.2163] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 10/12/2018] [Accepted: 10/20/2018] [Indexed: 11/11/2022]
Abstract
Lithium, administered to patients with bipolar disorders, is mainly excreted in the urine, and tubular reabsorption is involved. This study characterized the renal excretion of lithium in rats subjected to renal ischemia for 60 min or 90 min. After intravenous injection of lithium chloride at 25 mg/kg, the pharmacokinetic parameters of lithium were determined. In sham-operated rats, the renal clearance of lithium was calculated to be 1.49 ml/min/kg, and its ratio to creatinine clearance (fractional excretion) was 43.4%. Renal ischemia inhibited the renal excretion of lithium, and did not affect its fractional excretion. The urinary pH of rats with renal ischemia for 90 min was significantly higher than those of the other groups, and the linear regression with the fractional excretion of lithium in rats with renal ischemia showed a moderate correlation (r = 0.650, p = 0.00193). This study demonstrated the effect of renal ischemia on the renal excretion of lithium in rats. It was suggested that not only glomerular filtration but also the reabsorption of lithium was impaired by renal ischemia.
Collapse
Affiliation(s)
- Yuichi Uwai
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| | - Takato Suzuki
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| | - Ryota Kondo
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| | - Tatsuya Kawasaki
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| | - Tomohiro Nabekura
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| |
Collapse
|
13
|
Forster IC. The molecular mechanism of SLC34 proteins: insights from two decades of transport assays and structure-function studies. Pflugers Arch 2018; 471:15-42. [PMID: 30244375 DOI: 10.1007/s00424-018-2207-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/06/2018] [Accepted: 09/11/2018] [Indexed: 01/08/2023]
Abstract
The expression cloning some 25 years ago of the first member of SLC34 solute carrier family, the renal sodium-coupled inorganic phosphate cotransporter (NaPi-IIa) from rat and human tissue, heralded a new era of research into renal phosphate handling by focussing on the carrier proteins that mediate phosphate transport. The cloning of NaPi-IIa was followed by that of the intestinal NaPi-IIb and renal NaPi-IIc isoforms. These three proteins constitute the main secondary-active Na+-driven pathways for apical entry of inorganic phosphate (Pi) across renal and intestinal epithelial, as well as other epithelial-like organs. The key role these proteins play in mammalian Pi homeostasis was revealed in the intervening decades by numerous in vitro and animal studies, including the development of knockout animals for each gene and the detection of naturally occurring mutations that can lead to Pi-handling dysfunction in humans. In addition to characterising their physiological regulation, research has also focused on understanding the underlying transport mechanism and identifying structure-function relationships. Over the past two decades, this research effort has used real-time electrophysiological and fluorometric assays together with novel computational biology strategies to develop a detailed, but still incomplete, understanding of the transport mechanism of SLC34 proteins at the molecular level. This review will focus on how our present understanding of their molecular mechanism has evolved in this period by highlighting the key experimental findings.
Collapse
Affiliation(s)
- Ian C Forster
- Ion Channels and Human Diseases Laboratory, Florey Institute of Neuroscience and Mental Health, 30 Royal Parade, Parkville, VIC, 3052, Australia.
| |
Collapse
|
14
|
Uwai Y, Kawasaki T, Nabekura T. Nonlinear disposition of lithium in rats and saturation of its tubular reabsorption by the sodium-phosphate cotransporter as a cause. Biopharm Drug Dispos 2017; 39:83-87. [PMID: 29214648 DOI: 10.1002/bdd.2116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 08/16/2017] [Accepted: 11/26/2017] [Indexed: 12/26/2022]
Abstract
We previously reported the contribution of sodium-phosphate cotransporter to the tubular reabsorption of lithium in rats. In the present study, the dose dependency of the renal handling of lithium was examined in rats. When lithium chloride at 1.25 mg/kg, 2.5 mg/kg and 25 mg/kg was intravenously injected as a bolus, the areas under the plasma concentration-time curve of lithium until 60 minutes were calculated to be 6.23 mEq·min/l, 8.77 mEq·min/l and 64.6 mEq·min/l, respectively. The renal clearance of lithium and its fractional excretion increased with increments in the dose administered. The renal clearance of lithium strongly correlated with the urinary excretion rate of phosphate in the 1.25 mg/kg group (r = 0.840) and 2.5 mg/kg group (r = 0.773), whereas this correlation was weak in the 25 mg/kg group (r = 0.306). The infusion of foscarnet, a typical inhibitor of sodium-phosphate cotransporter, decreased the fractional reabsorption of lithium in rats administered lithium chloride at 2.5 mg/kg, but did not affect it in rats administered 25 mg/kg. These results demonstrate the nonlinearity of the renal excretion of lithium in rats, with the saturation of lithium reabsorption by the sodium-phosphate cotransporter potentially being involved.
Collapse
Affiliation(s)
- Yuichi Uwai
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| | - Tatsuya Kawasaki
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| | - Tomohiro Nabekura
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| |
Collapse
|
15
|
Jakobsson E, Argüello-Miranda O, Chiu SW, Fazal Z, Kruczek J, Nunez-Corrales S, Pandit S, Pritchet L. Towards a Unified Understanding of Lithium Action in Basic Biology and its Significance for Applied Biology. J Membr Biol 2017; 250:587-604. [PMID: 29127487 PMCID: PMC5696506 DOI: 10.1007/s00232-017-9998-2] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 10/21/2017] [Indexed: 01/14/2023]
Abstract
Lithium has literally been everywhere forever, since it is one of the three elements created in the Big Bang. Lithium concentration in rocks, soil, and fresh water is highly variable from place to place, and has varied widely in specific regions over evolutionary and geologic time. The biological effects of lithium are many and varied. Based on experiments in which animals are deprived of lithium, lithium is an essential nutrient. At the other extreme, at lithium ingestion sufficient to raise blood concentration significantly over 1 mM/, lithium is acutely toxic. There is no consensus regarding optimum levels of lithium intake for populations or individuals-with the single exception that lithium is a generally accepted first-line therapy for bipolar disorder, and specific dosage guidelines for sufferers of that condition are generally agreed on. Epidemiological evidence correlating various markers of social dysfunction and disease vs. lithium level in drinking water suggest benefits of moderately elevated lithium compared to average levels of lithium intake. In contrast to other biologically significant ions, lithium is unusual in not having its concentration in fluids of multicellular animals closely regulated. For hydrogen ions, sodium ions, potassium ions, calcium ions, chloride ions, and magnesium ions, blood and extracellular fluid concentrations are closely and necessarily regulated by systems of highly selective channels, and primary and secondary active transporters. Lithium, while having strong biological activity, is tolerated over body fluid concentrations ranging over many orders of magnitude. The lack of biological regulation of lithium appears due to lack of lithium-specific binding sites and selectivity filters. Rather lithium exerts its myriad physiological and biochemical effects by competing for macromolecular sites that are relatively specific for other cations, most especially for sodium and magnesium. This review will consider what is known about the nature of this competition and suggest using and extending this knowledge towards the goal of a unified understanding of lithium in biology and the application of that understanding in medicine and nutrition.
Collapse
Affiliation(s)
- Eric Jakobsson
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
| | | | - See-Wing Chiu
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Zeeshan Fazal
- Department of Biosciences, COMSATS Institute of Information Technology, Islamabad, Pakistan
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - James Kruczek
- Department of Physics, University of South Florida, Tampa, FL, USA
| | - Santiago Nunez-Corrales
- National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Illinois Informatics Institute, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Sagar Pandit
- Department of Physics, University of South Florida, Tampa, FL, USA
| | - Laura Pritchet
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Department of Psychological and Brain Sciences, University of California at Santa Barbara, Santa Barbara, CA, USA
| |
Collapse
|
16
|
Abstract
Lithium is the most successful mood stabilizer treatment for bipolar disorder. However, unlike conventional drugs that are designed to interact with a specific molecular target, the actions of lithium are distributed across many biological processes and pathways. Treatment response is subject to genetic variation between individuals and similar genetic variation may dictate susceptibility to side effects. Transcriptomic, genomic, and cell-model research strategies have all been deployed in the search for the genetic factors and biological systems that mediate the interaction between genetics and the therapeutic actions of lithium. In this review, recent findings from genome-wide studies and patient cell lines will be summarized and discussed from a standpoint that genuine progress is being made to define clinically useful mechanisms of this treatment, to place it in the context of bipolar disorder pathology, and to move towards a time when the prescription of lithium is targeted to those individuals who will derive the greatest benefit.
Collapse
Affiliation(s)
- Benjamin S Pickard
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK.
| |
Collapse
|
17
|
Uwai Y, Matsumoto M, Kawasaki T, Nabekura T. Enantioselective Effect of Flurbiprofen on Lithium Disposition in Rats. Pharmacology 2017; 99:236-239. [PMID: 28147361 DOI: 10.1159/000455917] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 01/09/2017] [Indexed: 11/19/2022]
Abstract
AIMS Lithium is administered for treating bipolar disorders and is mainly excreted into urine. Nonsteroidal anti-inflammatory drugs inhibit this process. In this study, we examined the enantioselective effect of flurbiprofen on the disposition of lithium in rats. METHODS Pharmacokinetic experiments with lithium were performed. RESULTS Until 60 min after the intravenous administration of lithium chloride at 30 mg/kg as a bolus, 17.8% of lithium injected was recovered into the urine. Its renal clearance was calculated to be 1.62 mL/min/kg. Neither creatinine clearance (Ccr) nor pharmacokinetics of lithium was affected by the simultaneous injection of (R)-flurbiprofen at 20 mg/kg. (S)-flurbiprofen impaired the renal function and interfered with the urinary excretion of lithium. The ratio of renal clearance of lithium to Ccr was decreased by the (S)-enantiomer. CONCLUSION This study clarified that the (S)-flurbiprofen but not (R)-flurbiprofen inhibited the renal excretion of lithium in rats.
Collapse
Affiliation(s)
- Yuichi Uwai
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| | | | | | | |
Collapse
|
18
|
Uwai Y, Kawasaki T, Nabekura T. Foscarnet, an inhibitor of the sodium-phosphate cotransporter NaPi-IIa, inhibits phosphorylation of glycogen synthase kinase-3β by lithium in the rat kidney cortex. Drug Metab Pharmacokinet 2016; 31:256-9. [PMID: 27238574 DOI: 10.1016/j.dmpk.2016.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 02/17/2016] [Accepted: 02/17/2016] [Indexed: 12/15/2022]
Abstract
Lithium, which is used in the treatment of and prophylaxis for bipolar disease, inhibits glycogen synthase kinase-3β (GSK3β) by producing its phosphorylated form (p-GSK3β). GSK3β plays a role in apoptosis and some kinds of acute kidney injuries, and the formation of p-GSK3β is considered to contribute to protection against acute kidney injury. We previously reported that the sodium-phosphate cotransporter NaPi-IIa (SLC34A1) mediated the reabsorption of lithium in the rat kidney. In the present study, the phosphorylation status of GSK3β in the kidney cortex of rats administered lithium chloride and foscarnet, a typical inhibitor of NaPi-IIa, was examined using Western blotting. Under a 2-h infusion of lithium chloride, the plasma concentration of lithium was 1.06 mEq/l, and its renal clearance was calculated as 1.18 ml/min/kg, which was 29.6% of creatinine clearance. The abundance of p-GSK3β in the kidney cortex was augmented by the administration of lithium. The simultaneous infusion of foscarnet increased the renal clearance of lithium and its ratio to creatinine clearance as well as the urinary excretion of phosphate. Foscarnet also inhibited the lithium-induced phosphorylation of GSK3β. These results suggest that the reabsorption of lithium by NaPi-IIa triggers the phosphorylation of GSK3β in the rat kidney cortex.
Collapse
Affiliation(s)
- Yuichi Uwai
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan.
| | - Tatsuya Kawasaki
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| | - Tomohiro Nabekura
- Department of Pharmaceutics, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| |
Collapse
|