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Sato K, Kakiyama G, Suzuki M, Naritaka N, Takei H, Sato H, Kimura A, Murai T, Kurosawa T, Pandak WM, Nittono H, Shimizu T. Changes in conjugated urinary bile acids across age groups. Steroids 2020; 164:108730. [PMID: 32961239 DOI: 10.1016/j.steroids.2020.108730] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 08/07/2020] [Accepted: 09/06/2020] [Indexed: 11/26/2022]
Abstract
Bile acid compositions are known to change dramatically after birth with aging. However, no reports have described the transition of conjugated urinary bile acids from the neonatal period to adulthood, and such findings would noninvasively offer insights into hepatic function. The aim of this study was to investigate differences in bile acid species, conjugation rates, and patterns, and to pool characteristics for age groups. We measured urinary bile acids in spot urine samples from 92 healthy individuals ranging from birth to 58 years old using liquid chromatography tandem mass spectrometry (LC/ESI-MS/MS). Sixty-six unconjugated and conjugated bile acids were systematically determined. After birth, urinary bile acids dramatically changed from fetal (i.e., Δ4-, Δ5-, and polyhydroxy-bile acids) to mature (i.e., CA and CDCA) bile acids. Peak bile acid excretion was 6-8 days after birth, steadily decreasing thereafter. A major change in bile acid conjugation pattern (taurine to glycine) also occurred at 2-4 months old. Our data provide important information regarding transitions of bile acid biosynthesis, including conjugation. The data also support the existence of physiologic cholestasis in the neonatal period and the establishment of the intestinal bacterial flora in infants.
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Affiliation(s)
- Keiko Sato
- Department of Pediatrics, Juntendo University, Faculty of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan.
| | - Genta Kakiyama
- Division of Gastroenterology, Hepatology, and Nutrition, Virginia Commonwealth University and McGuire VA Medical Center, 1201 Broad Rock Blvd., Richmond, VA 23249, USA.
| | - Mitsuyoshi Suzuki
- Department of Pediatrics, Juntendo University, Faculty of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan.
| | - Nakayuki Naritaka
- Junshin Clinic BA Institute, 2-1-22 Haramachi, Meguro-ku, Tokyo 152-0011, Japan.
| | - Hajime Takei
- Junshin Clinic BA Institute, 2-1-22 Haramachi, Meguro-ku, Tokyo 152-0011, Japan.
| | - Hiroaki Sato
- Department of Perinatal and Neonatal Medicine, Saitama Medical Center, Jichi Medical University, 1-847 Amanuma-cho, Omiya-ku, Saitama 330-8503, Japan.
| | - Akihiko Kimura
- Department of Pediatrics and Child Health, Kurume University School of Medicine, 67 Asahi-cho, Kurume, Fukuoka 830-0011, Japan.
| | - Tsuyoshi Murai
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757 Kanazawa, Tohbetsu-cho, Ishikari, Hokkaido 061-0293, Japan.
| | - Takao Kurosawa
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757 Kanazawa, Tohbetsu-cho, Ishikari, Hokkaido 061-0293, Japan.
| | - William M Pandak
- Division of Gastroenterology, Hepatology, and Nutrition, Virginia Commonwealth University and McGuire VA Medical Center, 1201 Broad Rock Blvd., Richmond, VA 23249, USA.
| | - Hiroshi Nittono
- Junshin Clinic BA Institute, 2-1-22 Haramachi, Meguro-ku, Tokyo 152-0011, Japan.
| | - Toshiaki Shimizu
- Department of Pediatrics, Juntendo University, Faculty of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan.
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Ferrandi EE, Bertuletti S, Monti D, Riva S. Hydroxysteroid Dehydrogenases: An Ongoing Story. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000192] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Erica Elisa Ferrandi
- Istituto di Scienze e Tecnologie Chimiche “G. Natta” (SCITEC); Consiglio Nazionale delle Ricerche (CNR); Via Mario Bianco 9 20131 Milano Italy
| | - Susanna Bertuletti
- Istituto di Scienze e Tecnologie Chimiche “G. Natta” (SCITEC); Consiglio Nazionale delle Ricerche (CNR); Via Mario Bianco 9 20131 Milano Italy
- Università degli Studi di Milano; Via Giuseppe Colombo 60 20133 Milano Italy
| | - Daniela Monti
- Istituto di Scienze e Tecnologie Chimiche “G. Natta” (SCITEC); Consiglio Nazionale delle Ricerche (CNR); Via Mario Bianco 9 20131 Milano Italy
| | - Sergio Riva
- Istituto di Scienze e Tecnologie Chimiche “G. Natta” (SCITEC); Consiglio Nazionale delle Ricerche (CNR); Via Mario Bianco 9 20131 Milano Italy
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Ma Z, Wang X, Yin P, Wu R, Zhou L, Xu G, Niu J. Serum metabolome and targeted bile acid profiling reveals potential novel biomarkers for drug-induced liver injury. Medicine (Baltimore) 2019; 98:e16717. [PMID: 31374067 PMCID: PMC6708818 DOI: 10.1097/md.0000000000016717] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
This study aims to determine the non-invasive, reliable and sensitive biochemical parameters for the diagnosis of drug-induced liver injury (DILI).Ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) and selected reaction monitoring (SRM) were used to profile the serum metabolome and quantify 15 targeted bile acid metabolites, respectively, in samples obtained from 38 DILI patients and 30 healthy controls.A comparison of the resulting serum metabolome profiles of the study participants revealed significant differences between DILI patients and healthy controls. Specifically, serum palmitic acid, taurochenodeoxycholic acid, glycocholic acid (GCA), and tauroursodeoxycholic acid (TUDCA) levels were significantly higher, and serum lysophosphatidylethanolamine levels were significantly lower in DILI patients vs healthy controls (P < .001). Furthermore, the SRM assay of bile acids revealed that the increase in GCA, taurocholic acid (TCA), TUDCA, glycochenodeoxycholic acid (GCDCA), glycochenodeoxycholic sulfate (GCDCS), and taurodeoxycholic acid (TDCA) corresponded to a higher degree of liver damage. These results also indicate that serum concentrations of chenodeoxycholic acid (CDCA), deoxycholic acid (DCA) and lithocholic acid (LCA) were significantly lower in patients with severe DILI, when compared to healthy controls, and that this decrease was closely correlated to the severity of liver damage.Taken together, these results demonstrate that bile acids could serve as potential biomarkers for the early diagnosis and severity of DILI.
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Affiliation(s)
- Zhenhua Ma
- Department of Hepatology, the First Hospital of Jilin University, Changchun
- Department of Hepatology, the Affiliated Hospital of Beihua University, Jilin
| | - Xiaomei Wang
- Department of Hepatology, the First Hospital of Jilin University, Changchun
| | - Peiyuan Yin
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, China
| | - Ruihong Wu
- Department of Hepatology, the First Hospital of Jilin University, Changchun
| | - Lina Zhou
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, China
| | - Guowang Xu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, China
| | - Junqi Niu
- Department of Hepatology, the First Hospital of Jilin University, Changchun
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Thakare R, Alamoudi JA, Gautam N, Rodrigues AD, Alnouti Y. Species differences in bile acids I. Plasma and urine bile acid composition. J Appl Toxicol 2018; 38:1323-1335. [DOI: 10.1002/jat.3644] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 04/11/2018] [Accepted: 04/11/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Rhishikesh Thakare
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Nebraska Medical Center; Omaha NE 68198 USA
| | - Jawaher Abdullah Alamoudi
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Nebraska Medical Center; Omaha NE 68198 USA
| | - Nagsen Gautam
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Nebraska Medical Center; Omaha NE 68198 USA
| | - A. David Rodrigues
- Pharmacokinetics, Pharmacodynamics & Metabolism, Medicine Design, Pfizer Inc.; Groton CT 06340 USA
| | - Yazen Alnouti
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Nebraska Medical Center; Omaha NE 68198 USA
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A multiplex HRMS assay for quantifying selected human plasma bile acids as candidate OATP biomarkers. Bioanalysis 2018; 10:645-657. [DOI: 10.4155/bio-2017-0274] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Aim: Selected bile acids (BAs) in plasma have been proposed as endogenous probes for assessing drug–drug interactions involving hepatic drug transporters such as the organic anion-transporting polypeptides (OATP1B1 and OATP1B3). Materials & methods: Plasma extracts were analyzed for selected BAs using a triple TOF API6600 high-resolution mass spectrometer. Results: Glycodeoxycholic acid 3-sulfate, glycochenodeoxycholic acid 3-sulfate, glycodeoxycholic acid 3-O-β-glucuronide and glycochenodeoxycholic acid 3-O-β-glucuronide are presented as potential OATP1B1/3 biomarkers.Conclusion: Six BAs are quantified in human plasma using a multiplexed high-resolution mass spectrometry method. Glycodeoxycholic acid 3-sulfate and glycodeoxycholic acid 3-O-β-glucuronide are proposed as potential biomarkers based on observed four- to fivefold increase in plasma AUC (vs placebo), following administration of a compound known to present as an OATP1B1/3 inhibitor in vitro.
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Bathena SPR, Mukherjee S, Olivera M, Alnouti Y. The profile of bile acids and their sulfate metabolites in human urine and serum. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 942-943:53-62. [PMID: 24212143 DOI: 10.1016/j.jchromb.2013.10.019] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 09/27/2013] [Accepted: 10/14/2013] [Indexed: 01/07/2023]
Abstract
The role of sulfation in ameliorating the hepatotoxicity of bile acids (BAs) in humans remains unknown due to the lack of proper analytical methods to quantify individual BAs and their sulfate metabolites in biological tissues and fluids. To this end, a simple and sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed and validated to characterize the detailed BA profile in human urine and serum. The limit of quantification was 1ng/mL and baseline separation of all analytes was achieved within in a run time of 32min. The method was validated over the dynamic range of 1-1000ng/mL. The LC-MS/MS method was more accurate, precise, and selective than the commercially available kits for the quantification of sulfated and unsulfated BAs, and the indirect quantification of individual sulfated BAs after solvolysis. The LC-MS/MS method was applied to characterize the BA profile in urine and serum of healthy subjects. Thirty three percent of serum BAs were sulfated, whereas 89% of urinary BAs existed in the sulfate form, indicating the role of sulfation in enhancing the urinary excretion of BAs. The percentage of sulfation of individual BAs increased with the decrease in the number of hydroxyl groups indicating the role of sulfation in the detoxification of the more hydrophobic and toxic BA species. Eighty percent of urinary BAs and 55% of serum BAs were present in the glycine-amidated form, whereas 8% of urinary BAs and 13% of serum BAs existed in the taurine-amidated form.
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Affiliation(s)
- Sai Praneeth R Bathena
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198, United States
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Jové M, Ayala V, Ramírez-Núñez O, Serrano JCE, Cassanyé A, Arola L, Caimari A, Del Bas JM, Crescenti A, Pamplona R, Portero-Otín M. Lipidomic and metabolomic analyses reveal potential plasma biomarkers of early atheromatous plaque formation in hamsters. Cardiovasc Res 2012; 97:642-52. [PMID: 23241314 DOI: 10.1093/cvr/cvs368] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
AIMS Atherosclerosis is the main pathological process contributing to cardiovascular disease, with diet being the most important factor involved. Although the lipidome of atheromatous plaque has been studied previously, the use of comparative lipidomics and metabolomics in plasma in early atherogenesis could lead to the discovery of plasma biomarkers that allow not only disease prediction but also measurement of disease progression. METHODS AND RESULTS High-throughput techniques, such as liquid chromatography/mass spectrometry, allowed us to compare the circulating and aortic lipidome and plasma metabolome in order to look for new molecular targets involved in atherogenesis. To achieve this objective, we chose the hamster (Mesocricetus auratus) as the best small animal model for diet-induced early atherosclerosis, because its lipoprotein metabolism is similar to that of humans. The results revealed the existence of several, previously unreported, changes in lipid and amino-acid metabolism, the peroxisome proliferator-activated receptor γ pathway, and oxidative and endoplasmic reticulum stress, also involving cell senescence. Furthermore, as a proof of concept in the modelling of dietary influences in atherogenesis, we have measured the effect of a potential anti-atherogenic polyphenol extract on the reported pathways. Our results support a previously unknown role for taurocholic acid as a potential plasma biomarker of early atheromatous plaque formation. CONCLUSION The use of comparative liquid chromatography/mass spectrometry-based lipidomics and metabolomics allows the discovery of novel pathways in atherogenesis, as well as new potential plasma biomarkers, which could allow us to predict disease in its early stages and measure its progression.
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Affiliation(s)
- Mariona Jové
- Department of Experimental Medicine, Faculty of Medicine, Universitat de Lleida-IRBLleida, Spain
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Sokol RJ, Shepherd RW, Superina R, Bezerra JA, Robuck P, Hoofnagle JH. Screening and outcomes in biliary atresia: summary of a National Institutes of Health workshop. Hepatology 2007; 46:566-81. [PMID: 17661405 PMCID: PMC3888317 DOI: 10.1002/hep.21790] [Citation(s) in RCA: 171] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Biliary atresia is the most common cause of end-stage liver disease in the infant and is the leading pediatric indication for liver transplantation in the United States. Earlier diagnosis (<30-45 days of life) is associated with improved outcomes following the Kasai portoenterostomy and longer survival with the native liver. However, establishing this diagnosis is problematic because of its rarity, the much more common indirect hyperbilirubinemia that occurs in the newborn period, and the schedule for routine infant health care visits in the United States. The pathogenesis of biliary atresia appears to involve immune-mediated fibro-obliteration of the extrahepatic and intrahepatic biliary tree in most patients and defective morphogenesis of the biliary system in the remainder. The determinants of the outcome of portoenterostomy include the age at surgery, the center's experience, the presence of associated congenital anomalies, and the postoperative occurrence of cholangitis. A number of screening strategies in infants have been studied. The most promising are early measurements of serum conjugated bilirubin and a stool color card given to new parents that alerts them and their primary care provider to alcholic stools. This report summarizes a National Institutes of Health workshop held on September 12 and 13, 2006, in Bethesda, MD, that addressed the issues of outcomes, screening, and pathogenesis of biliary atresia.
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Affiliation(s)
- Ronald J Sokol
- Department of Pediatrics, University of Colorado School of Medicine, The Children's Hospital, Denver, CO, USA.
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Obatake M, Muraji T, Satoh S, Nishijima E, Tsugawa C. Urinary sulfated bile acids: a new simple urine test for cholestasis in infants and children. J Pediatr Surg 2002; 37:1707-8. [PMID: 12483636 DOI: 10.1053/jpsu.2002.36701] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND/PURPOSE Measurement of urinary sulfated bile acid (USBA) has been reported as a simple urine test that reflects the degree of cholestasis. The authors report the diagnostic value of this new laboratory test in various cholestatic conditions affecting infants and children. METHODS A urine sample was collected from 4 surgical neonates with parenteral nutrition-induced cholestasis and 48 patients with biliary atresia (BA). USBA was measured by direct enzymatic assay. RESULTS In 3 patients receiving parenteral nutrition, USBA increased with caloric gains. For one surgical patient, a decrease in calories because of liver dysfunction resulted in a decrease of USBA, closely reflecting the fluctuations of caloric intake. In patients with BA, a significant positive correlation was noted between serum bile acid and USBA (r = 0.85; P <.01). Ten of 14 febrile episodes in 6 patients with liver dysfunction and increased C-reactive protein showed elevated USBA, thus diagnosed as cholangitis. Four febrile episodes caused by viral infection showed no elevation of USBA. CONCLUSIONS USBA is a simple and sensitive noninvasive test reflecting the degree of cholestasis in infants and children. USBA correlated highly with serum bile acid levels and may be helpful in diagnosis of cholestasis caused by cholangitis without blood sampling.
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St-Pierre MV, Kullak-Ublick GA, Hagenbuch B, Meier PJ. Transport of bile acids in hepatic and non-hepatic tissues. J Exp Biol 2001; 204:1673-86. [PMID: 11316487 DOI: 10.1242/jeb.204.10.1673] [Citation(s) in RCA: 116] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Bile acids are steroidal amphipathic molecules derived from the catabolism of cholesterol. They modulate bile flow and lipid secretion, are essential for the absorption of dietary fats and vitamins, and have been implicated in the regulation of all the key enzymes involved in cholesterol homeostasis. Bile acids recirculate through the liver, bile ducts, small intestine and portal vein to form an enterohepatic circuit. They exist as anions at physiological pH and, consequently, require a carrier for transport across the membranes of the enterohepatic tissues. Individual bile acid carriers have now been cloned from several species. Na(+)-dependent transporters that mediate uptake into hepatocytes and reabsorption from the intestine and biliary epithelium and an ATP-dependent transporter that pumps bile acids into bile comprise the classes of transporter that are specific for bile acids. In addition, at least four human and five rat genes that code for Na(+)-independent organic anion carriers with broad multi-substrate specificities that include bile acids have been discovered. Studies concerning the regulation of these carriers have permitted identification of molecular signals that dictate eventual changes in the uptake or excretion of bile acids, which in turn have profound physiological implications. This overview summarizes and compares all known bile acid transporters and highlights findings that have identified diseases linked to molecular defects in these carriers. Recent advances that have fostered a more complete appreciation for the elaborate disposition of bile acids in humans are emphasized.
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Affiliation(s)
- M V St-Pierre
- Division of Clinical Pharmacology and Toxicology, Department of Medicine, University Hospital, Zurich CH-8091, Switzerland
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Matsui A, Kasano Y, Yamauchi Y, Momoya T, Shimada T, Ishikawa T, Abukawa D, Kimura A, Adachi K, Tazuke Y. Direct enzymatic assay of urinary sulfated bile acids to replace serum bilirubin testing for selective screening of neonatal cholestasis. J Pediatr 1996; 129:306-8. [PMID: 8765633 DOI: 10.1016/s0022-3476(96)70260-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Direct enzymatic assay of urinary sulfated bile acids is a sensitive, rapid, minimally invasive, and convenient method of detecting cholestasis in young infants. It may replace measurement of serum direct bilirubin for selective screening for biliary atresia and neonatal hepatitis syndrome at 1 month of age.
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Affiliation(s)
- A Matsui
- Department of Pediatrics, Jichi Medical School, Tochigi, Japan
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Takahashi T, Morotomi M. Absence of cholic acid 7 alpha-dehydroxylase activity in the strains of Lactobacillus and Bifidobacterium. J Dairy Sci 1994; 77:3275-86. [PMID: 7814703 DOI: 10.3168/jds.s0022-0302(94)77268-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
To investigate the presence of 7 alpha-dehydroxylase activity on bile acids in the bacterial strains of fermented milk products, 46 strains of Lactobacillus casei, Lactobacillus paracasei, Lactobacillus rhamnosus, Lactobacillus acidophilus, Lactobacillus gasseri, Bifidobacterium adolescentis, Bifidobacterium bifidum, Bifidobacterium breve, Bifidobacterium infantis, Bifidobacterium longum, Lactococcus lactis spp. lactis, and Streptococcus salivarius spp. thermophilus were tested for their ability to produce deoxycholic acid from cholic acid. The production of deoxycholic acid was quantitatively measured by radiochromatographic analysis in anaerobically prepared washed whole resting cells and by HPLC analysis in growing cultures. Resting whole cells from a positive control strain, Eubacterium lentum-like strain c-25, converted 81.7% of .2 mM cholic acid to deoxycholic acid and 3.7% to 7-keto-deoxycholic acid, when the cell suspension was incubated anaerobically at a concentration of 2 mg of protein/ml for 4 h at pH 7.3. However, none of the test strains investigated in this study was able to transform cholic acid under the same conditions. In growing cultures, 91.5% of 150 micrograms/ml of cholic acid was transformed to deoxycholic acid and 1.1% to 7-keto-deoxycholic acid by E. lentum-like c-25 after a 7-d anaerobic incubation. None of the test strains showed production of either deoxycholic acid or 7-keto-deoxycholic acid as growing cultures.
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Affiliation(s)
- T Takahashi
- Yakult Central Institute for Microbiological Research, Tokyo, Japan
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Obinata K, Nemeth A, Ellin A, Strandvik B. Bile salt sulphotransferase activity in the liver of cholestatic infants. Scand J Clin Lab Invest 1994; 54:285-90. [PMID: 7939371 DOI: 10.3109/00365519409087524] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A simple assay of bile salt sulphotransferase activity in human liver was developed. The system used glycolithocholate and PAPS as substrates. Km values for glycolithocholate and PAPs were 2.8 microM and 11.5 microM, respectively. Furthermore bile salt sulphation capacity in infants with cholestasis was investigated by measuring the activity of the bile salt sulphotransferase in the liver. No significant difference was found between the sulphotransferase activity in cholestatic infants and non-cholestatic adults. In addition the magnitude of the bile salt sulphotransferase activity in as neonatal liver did not differ from the enzymatic activity in adult liver. It is thus considered unlikely that low degree of sulphation of bile salts in infants is due to reduced capacity of this enzyme system.
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Affiliation(s)
- K Obinata
- Department of Paediatrics, Karolinska Institutet, Huddinge, Hospital, Stockholm, Sweden
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Obinata K, Carlström K, Hjelte L, Strandvik B. The effect of essential fatty acid deficiency on hepatic bile salt sulphotransferase in rats. J Steroid Biochem Mol Biol 1992; 42:625-7. [PMID: 1637725 DOI: 10.1016/0960-0760(92)90454-q] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Hepatic bile salt sulphotransferase (BSS) activity and the contents of unconjugated oestradiol-17 beta (E2) and conjugated oestrone (cE1) in liver tissue was significantly lower in young essential fatty acid (EFA) deficient female rats than in female control rats. No corresponding differences were found between male EFA deficient and control rats. A significant sex difference, with higher values in females, was found for BSS activity and E2 and cE1 contents in control rats but not in EFA deficient rats. The decrease in hepatic BSS activity in female rats caused by EFA deficiency may be mediated via a decreased estrogenic action on the liver.
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Affiliation(s)
- K Obinata
- Department of Pediatrics, Karolinska Institutet, Huddinge Hospital, Stockholm, Sweden
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15
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Radominska A, Comer KA, Zimniak P, Falany J, Iscan M, Falany CN. Human liver steroid sulphotransferase sulphates bile acids. Biochem J 1990; 272:597-604. [PMID: 2268288 PMCID: PMC1149750 DOI: 10.1042/bj2720597] [Citation(s) in RCA: 97] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The sulphation of bile acids is an important pathway for the detoxification and elimination of bile acids during cholestatic liver disease. A dehydroepiandrosterone (DHEA) sulphotransferase has been purified from male and female human liver cytosol using DEAE-Sepharose CL-6B and adenosine 3',5'-diphosphate-agarose affinity chromatography [Falany, Vazquez & Kalb (1989) Biochem. J. 260, 641-646]. Results in the present paper show that the DHEA sulphotransferase, purified to homogeneity, is also reactive towards bile acids, including lithocholic acid and 6-hydroxylated bile acids, as well as 3-hydroxylated short-chain bile acids. The highest activity towards bile acids was observed with lithocholic acid (54.3 +/- 3.6 nmol/min per mg of protein); of the substrates tested, the lowest activity was detected with hyodeoxycholic acid (4.2 +/- 0.01 nmol/min per mg of protein). The apparent Km values for the enzyme are 1.5 +/- 0.31 microM for lithocholic acid and 4.2 +/- 0.73 microM for taurolithocholic acid. Lithocholic acid also competitively inhibits DHEA sulphation by the purified sulphotransferase (Ki 1.4 microM). No evidence was found for the formation of bile acid sulphates by sulphotransferases different from the DHEA sulphotransferase during purification work. The above results suggest that a single steroid sulphotransferase with broad specificity encompassing neutral steroids and bile acids exists in human liver.
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Affiliation(s)
- A Radominska
- Department of Internal Medicine, University of Arkansas for Medical Sciences, Little Rock 72205
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Arisaka M, Arisaka O, Nittono H, Obinata K, Niijima S, Yabuta K, Suzuki F, Yanagawa S. Conjugating ability of bile acids in hepatic failure. ACTA PAEDIATRICA SCANDINAVICA 1986; 75:875-8. [PMID: 3564956 DOI: 10.1111/j.1651-2227.1986.tb10309.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A 5-month-old boy with giant cell hepatitis died of hepatic failure. Analysis of serum bile acids by high pressure liquid chromatography revealed a marked increase in total bile acid concentration and a decrease in the cholate to chenodeoxycholate ratio. However, contrary to expectation, the conjugating ability of bile acids with taurine or glycine was well preserved. This suggests that the amino acid conjugation can occur despite the presence of severe hepatocellular damage.
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