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Sakurai-Yageta M, Suzuki Y. Molecular Mechanisms of Biotin in Modulating Inflammatory Diseases. Nutrients 2024; 16:2444. [PMID: 39125325 PMCID: PMC11314543 DOI: 10.3390/nu16152444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2024] [Revised: 07/23/2024] [Accepted: 07/24/2024] [Indexed: 08/12/2024] Open
Abstract
Biotin, also known as vitamin B7 or vitamin H, is a water-soluble B-complex vitamin and serves as an essential co-enzyme for five specific carboxylases. Holocarboxylase synthase (HCS) activates biotin and facilitates its covalent attachment to these enzymes, while biotinidase releases free biotin in the biotin cycle. The transport of biotin, primarily from the intestine, is mediated by the sodium-dependent multi-vitamin transporter (SMVT). Severe biotin deficiency leads to multiple carboxylase deficiency. Moreover, biotin is crucial to glucose and lipid utilization in cellular energy production because it modulates the expression of metabolic enzymes via various signaling pathways and transcription factors. Biotin also modulates the production of proinflammatory cytokines in the immune system through similar molecular mechanisms. These regulatory roles in metabolic and immune homeostasis connect biotin to conditions such as diabetes, dermatologic manifestations, and multiple sclerosis. Furthermore, deficiencies in biotin and SMVT are implicated in inflammatory bowel disease, affecting intestinal inflammation, permeability, and flora. Notably, HCS and probably biotin directly influence gene expression through histone modification. In this review, we summarize the current knowledge on the molecular aspects of biotin and associated molecules in diseases related to both acute inflammatory responses and chronic inflammation, and discuss the potential therapeutic applications of biotin.
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Affiliation(s)
- Mika Sakurai-Yageta
- Department of Education and Training, Tohoku Medical Megabank Organization, Tohoku University, Sendai 980-8573, Miyagi, Japan
- Advanced Research Center for Innovations in Next-Generation Medicine, Tohoku University, Sendai 980-8573, Miyagi, Japan
| | - Yoichi Suzuki
- Department of Education and Training, Tohoku Medical Megabank Organization, Tohoku University, Sendai 980-8573, Miyagi, Japan
- Department of Clinical Genetics, Ageo Central General Hospital, Ageo 362-8588, Saitama, Japan
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2
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Liang H, Wu S, Yang D, Huang J, Yao X, Gong J, Qing Z, Tao L, Peng Q. Non-targeted Metabolomics Analysis Reveals Distinct Metabolic Profiles Between Positive and Negative Emotional Tears of Humans: A Preliminary Study. Cureus 2023; 15:e42985. [PMID: 37671209 PMCID: PMC10476548 DOI: 10.7759/cureus.42985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2023] [Indexed: 09/07/2023] Open
Abstract
Background Basal, reflex, and emotional tears differ in chemical components. It is not yet known whether chemical differences exist in tears of different emotions. We investigated the biochemical basis of emotional tears by performing non-targeted metabolomics analyses of positive and negative emotional tears of humans. Methods Samples of reflex, negative, and positive emotional tears were obtained from 12 healthy college participants (11 females and one male). Untargeted metabolomics was performed to identify metabolites in different types of tears. The differentially altered metabolites were screened and assessed using univariate and multivariate analyses. Results The orthogonal partial least squares discriminant analysis model showed that reflex, negative, and positive emotional tears were clearly separated. A total of 133 significantly differentially expressed metabolites of electrospray ionization source (ESI-) mode were identified between negative and positive emotional tears. The top 50 differentially expressed metabolites between negative and positive emotional tears were highly correlated. Pathway analysis revealed that secretion of negative emotional tears was associated with some synapses in the brain, regulation of a series of endocrine hormones, including the estrogen signaling pathway, and inflammation activities, while secretion of positive emotional tears was correlated with biotin and caffeine metabolism. Conclusions It is indicated that metabolic profiles of reflex, positive, and negative emotional tears of humans are distinct, and secretion of the tears involves distinct biological activities. Therefore, we present a chemical method for detecting human emotions, which may become a powerful tool for the diagnosis of mental diseases and the identification of fake tears.
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Affiliation(s)
- Hao Liang
- Institute of Traditional Chinese Medicine Diagnostics, Hunan University of Chinese Medicine, Changsha, CHN
| | - Songye Wu
- Institute of Traditional Chinese Medicine Diagnostics, Hunan University of Chinese Medicine, Changsha, CHN
| | - Duo Yang
- Ophthalmology Department, Jili Hospital, Liuyang, CHN
| | - Jianhua Huang
- Institute of Herbs, Hunan University of Chinese Medicine, Changsha, CHN
| | - Xiaolei Yao
- Ophthalmology Department, First Hospital of Hunan University of Chinese Medicine, Changsha, CHN
| | - Jingbo Gong
- Psychiatric Disease Clinical Research Center, Shanghai Changning Mental Health Center, Shanghai, CHN
| | - Zhixing Qing
- Hunan Key Laboratory of Traditional Chinese Veterinary Medicine, Hunan Agricultural University, Changsha, CHN
| | - Lijuan Tao
- Ophthalmology Department, Hunan Children's Hospital, Changsha, CHN
| | - Qinghua Peng
- Institute of Traditional Chinese Medicine Diagnostics, Hunan University of Chinese Medicine, Changsha, CHN
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3
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Bakhos D, Blasco H, Galvin JJ, Ferreira CR, Blau N. Clinical and biochemical footprints of inherited metabolic diseases. IX. Metabolic ear disease. Mol Genet Metab 2022; 137:223-229. [PMID: 36183456 PMCID: PMC10551722 DOI: 10.1016/j.ymgme.2022.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 09/19/2022] [Accepted: 09/20/2022] [Indexed: 11/23/2022]
Abstract
Damages to the ear are very diverse and can depend on the type of inherited metabolic diseases (IMD). Indeed, IMDs can affect all parts of the auditory system, from the outer ear to the central auditory process. We have identified 219 IMDs associated with various types of ear involvement which we classified into five groups according to the lesion site of the auditory system: congenital external ear abnormalities, acquired external ear abnormalities, middle ear involvement, inner ear or retrocochlear involvement, and unspecified hearing loss. This represents the ninth issue in a series of educational summaries providing a comprehensive and updated list of metabolic differential diagnoses according to system involvement.
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Affiliation(s)
- David Bakhos
- CHRU de Tours, service ORL et Chirurgie Cervico-Faciale, boulevard Tonnellé, 37044 Tours, France; Université de Tours, France INSERM U1253, Tours, France; House Institute Foundation, Los Angeles, USA.
| | - Hélène Blasco
- Université de Tours, France INSERM U1253, Tours, France; CHRU de Tours, service de biochimie, boulevard Tonnellé, 37044 Tours, France.
| | - John J Galvin
- CHRU de Tours, service ORL et Chirurgie Cervico-Faciale, boulevard Tonnellé, 37044 Tours, France; Université de Tours, France INSERM U1253, Tours, France; House Institute Foundation, Los Angeles, USA
| | - Carlos R Ferreira
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA.
| | - Nenad Blau
- Division of Metabolism, University Children's Hospital, Zürich, Switzerland.
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Cochlear Implantation in Biotinidase Enzyme Deficiency. Indian J Otolaryngol Head Neck Surg 2022; 74:316-319. [PMID: 36032817 PMCID: PMC9411370 DOI: 10.1007/s12070-020-02105-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 08/25/2020] [Indexed: 11/25/2022] Open
Abstract
Metabolic syndromes associated with hearing loss are rare and are characterized by specific enzyme pathway deficiencies involving lysosomal storage, peroxisomes, fatty acid enzymes, organic acids and amino acids. The deficiency of biotinidase, an enzyme involved in the metabolism of biotin, is one such rare cause of congenital hearing loss estimated at 1:60,000 newborns. The parents of a 5-year-old girl presented to the clinic with complaints that she was hard of hearing with no speech development. At age 2 she had been diagnosed with organic aciduria and hydronephrourethrosis and was operated for renal calculi. Clinical examination showed periorificial scaly skin lesions and eczematous otitis externa. An audiological evaluation showed bilateral profound SNHL. Imaging and routine investigations were unremarkable, except for a mild low anion gap metabolic acidosis. General anaesthesia involved avoidance of neuromuscular agents due to the risk of inducing hypotonia. Surgery consisted of cortical mastoidectomy followed by the facial recess approach. A standard electrode array was inserted via the round window technique and complete atraumatic insertion was achieved. Intraoperative electrode impedance and NRT tracings were good. Hearing loss in biotinidase deficiency may be expected to be of progressive nature and regular evaluation of hearing and speech is required. Cochlear implantation is currently the best available solution for severe to profound hearing loss in this disorder although the enzymatic pathology affects the entire auditory pathway. Biotin supplementation is required lifelong for its management.
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5
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Trinh TT, Blasco H, Maillot F, Bakhos D. Hearing loss in inherited metabolic disorders: A systematic review. Metabolism 2021; 122:154841. [PMID: 34333001 DOI: 10.1016/j.metabol.2021.154841] [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: 05/02/2021] [Revised: 07/14/2021] [Accepted: 07/15/2021] [Indexed: 10/20/2022]
Abstract
Inherited metabolic disorders (IMDs) have been observed in individuals with hearing loss (HL), but IMDs are rarely the cause of syndromic HL. With early diagnosis, management of HL is more effective and cortical reorganization is possible with hearing aids or cochlear implants. This review describes relationships between IMDs and HL in terms of incidence, etiology of HL, pathophysiology, and treatment. Forty types of IMDs are described in the literature, mainly in case reports. Management and prognosis are noted where existing. We also describe IMDs with HL given age of occurrence of HL. Reviewing the main IMDs that are associated with HL may provide an additional clinical tool with which to better diagnose syndromic HL.
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Affiliation(s)
- T-T Trinh
- CHRU de Tours, service ORL et Chirurgie Cervico-Faciale, Tours, France.
| | - H Blasco
- Laboratoire de Biochimie et Biologie Moléculaire, Tours, France; Université François Rabelais, Tours, France; INSERM U1253, Tours, France
| | - F Maillot
- Université François Rabelais, Tours, France; INSERM U1253, Tours, France; CHU de Tours, service de Médecine Interne, Tours, France
| | - D Bakhos
- CHRU de Tours, service ORL et Chirurgie Cervico-Faciale, Tours, France; Université François Rabelais, Tours, France; INSERM U1253, Tours, France
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Yılmaz NDS, Gür ÖE, Ensari N, Bulut E, Kaya OT, Sırvancı S, Danısman B, Derin N, Gezgin B, Aygener N, Yılmaz MD. Effect of perinatal biotin deficiency on auditory pathway of the Wistar-Albino rats. Acta Otolaryngol 2019; 139:677-684. [PMID: 31124733 DOI: 10.1080/00016489.2019.1614665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Aim: Severe biotin deficiency associated with biotinidase enzyme deficiency in newborns is seen as severe neurological problems and hearing loss. However, the effect on the infant of deficiencies in the maternal diet during pregnancy are not clear. Material and methods: The study included 16 female Wistar albino rats and 4 male Wistar albino rats, that were mated and then the females were separated into 4 groups. At 40 days after the birth, 3 pups were selected from each group, and these 12 pups were evaluated with DPOAE and ABR electrophysiologically and the cochlea was examined ultrastructurally with electron microscopy. Results: In the DPOAE evaluation, At 8000 and 11,000 Hz, the signal-noise ratios in the B-N and B-B groups were statistically significantly higher (p < .05). In ABR, lengthening of the latency periods was determined in all the waves at both 8 and 16 kHz in the B-B group. When the IPL periods were examined, lengthening in IPL 1-5 was statistically significant in the B-B group only at 8 kHz. Conclusions: Biotin can be said to have an effect on hearing pathways. However, specifically where on the hearing pathways that biotin is involved has not been clarified.
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Affiliation(s)
| | - Özer Erdem Gür
- Depatment of Otolaryngology, Antalya Training and Research Hospital, Turkey
| | - Nuray Ensari
- Depatment of Otolaryngology, Antalya Training and Research Hospital, Turkey
| | - Erdogan Bulut
- Faculty of Health Sciences, Department of Audiology, Trakya University, Turkey
| | - Ozlem Tugce Kaya
- Department of Histology and Embryology, Marmara University, Istanbul, Turkey
| | - Serap Sırvancı
- Department of Histology and Embryology, Marmara University, Istanbul, Turkey
| | | | - Narin Derin
- Department of Biophysics, Akdeniz University, Turkey
| | - Bahri Gezgin
- Department of Biophysics, Akdeniz University, Turkey
| | - Nurdan Aygener
- Department of Audiology, Konya Medicana International Hospital, Turkey
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7
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León-Del-Río A. Biotin in metabolism, gene expression, and human disease. J Inherit Metab Dis 2019; 42:647-654. [PMID: 30746739 DOI: 10.1002/jimd.12073] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 02/05/2019] [Indexed: 12/16/2022]
Abstract
Biotin is a water-soluble vitamin that belongs to the vitamin B complex and which is an essential nutrient of all living organisms from bacteria to man. In eukaryotic cells biotin functions as a prosthetic group of enzymes, collectively known as biotin-dependent carboxylases that catalyze key reactions in gluconeogenesis, fatty acid synthesis, and amino acid catabolism. Enzyme-bound biotin acts as a vector to transfer a carboxyl group between donor and acceptor molecules during carboxylation reactions. In recent years, evidence has mounted that biotin also regulates gene expression through a mechanism beyond its role as a prosthetic group of carboxylases. These activities may offer a mechanistic background to a developing literature on the action of biotin in neurological disorders. This review summarizes the role of biotin in activating carboxylases and proposed mechanisms associated with a role in gene expression and in ameliorating neurological disease.
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Affiliation(s)
- Alfonso León-Del-Río
- Programa de Investigación en Cáncer de Mama and Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
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8
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Maheras KJ, Pindolia K, Wolf B, Gow A. Developmental window of sensorineural deafness in biotinidase-deficient mice. J Inherit Metab Dis 2017; 40:733-744. [PMID: 28516283 PMCID: PMC8148422 DOI: 10.1007/s10545-017-0049-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 04/07/2017] [Accepted: 04/10/2017] [Indexed: 10/19/2022]
Abstract
Biotinidase deficiency is an autosomal recessively inherited disorder that results in the inability to recycle the vitamin, biotin. If untreated, the disorder can result in a range of neurological and cutaneous symptoms, including sensorineural deficits and deafness. To understand early mechanistic abnormalities that may precede more generalized and nonspecific effects of metabolic deficits such as weight loss and acidosis, we have analyzed auditory brainstem responses (ABRs) in biotinidase-deficient knockout (Btd -/- ) mice in the periweaning period with or without dietary biotin supplementation. We find significant increases in the latency of wave V of the ABR elicited by pure tone stimuli at one octave intervals, which precede substantial increases in ABR thresholds. Finer interpeak latency analyses of these changes indicate they are confined to the latter ABR waves associated with the CNS and likely reflect slowed brainstem transmission time. In contrast, peripheral nervous system conduction velocity appears normal. Further, we find that biotin-supplementation after the onset of symptoms reverses the latency shifts, which has significant relevance for early treatment in patients. Finally, ABR latencies in Btd -/- mice fed a biotin-supplemented diet for the first month of life appear refractory to transmission time slowing during a subsequent bout of biotin deficiency. These data suggest a transient vulnerability window for biotin deficiency in the auditory brainstem. Finally, we also observe a developmental vulnerability window involving follicular melanosome production or melanocyte survival. Sensorineural deafness precedes peripheral hearing loss in developmental biotinidase deficiency and is transient if rescued by dietary biotin within a short developmental window.
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Affiliation(s)
- Kathleen June Maheras
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, 3216 Scott Hall, 540 E Canfield Ave, Detroit, MI, 48201, USA
| | - Kirit Pindolia
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, 3216 Scott Hall, 540 E Canfield Ave, Detroit, MI, 48201, USA
- Department of Research Administration, Henry Ford Hospital, Detroit, MI, 48202, USA
| | - Barry Wolf
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, 3216 Scott Hall, 540 E Canfield Ave, Detroit, MI, 48201, USA
- Department of Research Administration, Henry Ford Hospital, Detroit, MI, 48202, USA
| | - Alexander Gow
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, 3216 Scott Hall, 540 E Canfield Ave, Detroit, MI, 48201, USA.
- Carman and Ann Adams Department of Pediatrics, Detroit, MI, 48201, USA.
- Department of Neurology, Wayne State University School of Medicine, Detroit, MI, 48201, USA.
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9
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Wolf B. Biotinidase deficiency and our champagne legacy. Gene 2016; 589:142-50. [DOI: 10.1016/j.gene.2015.10.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 09/24/2015] [Accepted: 10/06/2015] [Indexed: 10/22/2022]
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10
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Hallazgos clínicos y genéticos en pacientes con deficiencia de biotinidasa detectados en el cribado neonatal o selectivo de sordera o de enfermedades metabólicas hereditarias. Med Clin (Barc) 2011; 137:500-3. [DOI: 10.1016/j.medcli.2011.01.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 01/26/2011] [Accepted: 01/27/2011] [Indexed: 11/17/2022]
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11
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Wolf B. The neurology of biotinidase deficiency. Mol Genet Metab 2011; 104:27-34. [PMID: 21696988 DOI: 10.1016/j.ymgme.2011.06.001] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Revised: 06/03/2011] [Accepted: 06/03/2011] [Indexed: 11/28/2022]
Abstract
Biotinidase deficiency is an autosomal recessively inherited metabolic disorder in which the enzyme, biotinidase, is defective and the vitamin, biotin, is not recycled. Individuals with biotinidase deficiency, if not treated with biotin, usually exhibit neurological and cutaneous abnormalities. Biotin treatment can ameliorate or prevent symptoms. Biotinidase deficiency meets the major criteria for inclusion in newborn screening programs. With the advent of universal newborn screening for the disorder, the "window-of-opportunity" to characterize the consequences of the untreated disease is essentially gone. To understand the neurology of biotinidase deficiency, we must depend on what is already known about symptomatic individuals with the disorder. Therefore, in this review, the neurological findings of symptomatic individuals with profound biotinidase deficiency have been compiled to catalog the characteristic features of the disorder and the consequences of biotin treatment on these findings. In addition, based on the available evidence, I have speculated on the cause of neurological problems associated with the disorder. Future studies in biotinidase-deficient animals should allow us to demonstrate more definitively if these speculations are correct.
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Affiliation(s)
- Barry Wolf
- Department of Medical Genetics, Henry Ford Hospital, Detroit, MI 48202, USA.
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12
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Abstract
Ohtahara syndrome is a rare epileptic encephalopathy in infants; the underlying etiology is generally thought to be structural brain malformations. The authors present a rare case of this type of epileptic encephalopathy in which a treatable metabolic condition such as biotinidase deficiency was suspected and diagnosed, and early institution of appropriate therapy led to a good clinical outcome.
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Affiliation(s)
- Pratibha Singhi
- Department of Pediatrics, Advanced Pediatric Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
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13
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Wolf B. Clinical issues and frequent questions about biotinidase deficiency. Mol Genet Metab 2010; 100:6-13. [PMID: 20129807 DOI: 10.1016/j.ymgme.2010.01.003] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2009] [Revised: 01/06/2010] [Accepted: 01/06/2010] [Indexed: 11/19/2022]
Abstract
Biotinidase deficiency is a biotin-responsive, inherited neurocutaneous disorder. The disorder is readily treatable and is screened for in the newborn period. Over the years since the discovery of the disorder, many practical questions and issues have been raised as to the diagnosis, management, treatment, and newborn screening of the disorder. In this paper, many of these issues are addressed using evidence-based medicine and anecdotal experiences. If adequate answers are not known, the answers to these queries will require future investigations.
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Affiliation(s)
- Barry Wolf
- Department of Medical Genetics, Henry Ford Hospital, 3031 West Grand Blvd., Suite 700, Detroit, MI 48202, USA.
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Arslan M, Vurucu S, Balamtekin N, Unay B, Akin R, Kurt I, Ozcan O. The effects of biotin supplementation on serum and liver tissue biotinidase enzyme activity and alopecia in rats which were administrated to valproic acid. Brain Dev 2009; 31:405-10. [PMID: 18814980 DOI: 10.1016/j.braindev.2008.07.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2007] [Revised: 04/06/2008] [Accepted: 07/12/2008] [Indexed: 11/30/2022]
Abstract
Valproic acid (VPA) is a widely used and well-tolerable antiepileptic drug in epileptic patients. However, VPA has many side effects dose-dependent or non-dose-dependent. It is reported that VPA treatment may lead to biotin deficiency and low serum and liver tissue biotinidase enzyme activity (BEA). Major clinical manifestations in biotin deficiency are seborrheic dermatitis, dry skin, fine and brittle hair, and alopecia. We aimed to investigate the effects of biotin supplementation on serum and liver tissue BEA and alopecia during VPA therapy. Rats were randomly divided into 4 groups, each consisted of 15 rats (VPA-B1, VPA-B2, VPA, and control). Except the control group, all groups were administrated VPA dose of 600 mg/kg/d per oral (PO) for 60 days with 12h intervals two divided doses. VPA-B1 was administrated biotin dose of 6 mg/kg/d and VPA-B2 was administrated biotin dose of 0.6 mg/kg/d. In the third week of the study, we determined alopecia in the study groups. Alopecia was seen in the subjects of 13.3% of VPA-B1 (n=2), 13.3% of VPA-B2 (n=2), and 40% of VPA (n=6). But statistical significant effect on alopecia by biotin supplementation was not able to be determined between the study groups. In the control group, alopecia was not observed. The ratios of alopecia in the study groups were statistically higher than the control group (p=0.028). Itchiness was more obvious in the study groups compared with the control group. Serum biotin levels of the biotin supplemented groups (VPA-B1 and VPA-B2) were higher than the other groups (VPA and control group). Serum biotin levels of the VPA group were lower than the control group. There were significant decreases in the levels of serum and liver tissue BEA of the study groups compared with the control group. In conclusion we showed that VPA usage reduced the serum and liver tissue BEA and impaired the biotin utilization by affecting the liver. Partial biotinidase deficiency may lead to alopecia. It might be prevented by biotin supplementation in the patients receiving VPA therapy. We considered that further studies are necessary to find out the effective and safe biotin dose.
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Affiliation(s)
- Mutluay Arslan
- Department of Pediatrics, Gulhane Military Medical Academy, School of Medicine, Turkey
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15
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Pérez-Monjaras A, Cervantes-Roldán R, Meneses-Morales I, Gravel RA, Reyes-Carmona S, Solórzano-Vargas S, González-Noriega A, León-Del-Río A. Impaired biotinidase activity disrupts holocarboxylase synthetase expression in late onset multiple carboxylase deficiency. J Biol Chem 2008; 283:34150-8. [PMID: 18845537 DOI: 10.1074/jbc.m806985200] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Biotinidase catalyzes the hydrolysis of the vitamin biotin from proteolytically degraded biotin-dependent carboxylases. This key reaction makes the biotin available for reutilization in the biotinylation of newly synthesized apocarboxylases. This latter reaction is catalyzed by holocarboxylase synthetase (HCS) via synthesis of 5'-biotinyl-AMP (B-AMP) from biotin and ATP, followed by transfer of the biotin to a specific lysine residue of the apocarboxylase substrate. In addition to carboxylase activation, B-AMP is also a key regulatory molecule in the transcription of genes encoding apocarboxylases and HCS itself. In humans, genetic deficiency of HCS or biotinidase results in the life-threatening disorder biotin-responsive multiple carboxylase deficiency, characterized by a reduction in the activities of all biotin-dependent carboxylases. Although the clinical manifestations of both disorders are similar, they differ in some unique neurological characteristics whose origin is not fully understood. In this study, we show that biotinidase deficiency not only reduces net carboxylase biotinylation, but it also impairs the expression of carboxylases and HCS by interfering with the B-AMP-dependent mechanism of transcription control. We propose that biotinidase-deficient patients may develop a secondary HCS deficiency disrupting the altruistic tissue-specific biotin allocation mechanism that protects brain metabolism during biotin starvation.
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Affiliation(s)
- Anylu Pérez-Monjaras
- Departamento de Biología Molecular y Biotecnología, Instituto de Investigaciones Biomédicas, Universidad Nacional AutónomadeMéxico, México D.F. 04510, México
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16
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Desai S, Ganesan K, Hegde A. Biotinidase deficiency: a reversible metabolic encephalopathy. Neuroimaging and MR spectroscopic findings in a series of four patients. Pediatr Radiol 2008; 38:848-56. [PMID: 18545994 DOI: 10.1007/s00247-008-0904-z] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2007] [Revised: 02/15/2008] [Accepted: 02/23/2008] [Indexed: 11/29/2022]
Abstract
BACKGROUND Biotinidase deficiency is a metabolic disorder characterized by inability to recycle biotin with resultant delayed myelination. Clinical findings include seizures, ataxia, alopecia and dermatitis with atypical findings of myoclonic jerks, neuropathy and spastic paraparesis. Neuroradiological findings include cerebral atrophy, encephalopathy and widened extracerebral CSF spaces. Many of the clinical and neuroradiological features are reversible except sensorineural hearing loss and optic atrophy. OBJECTIVE To understand and describe the neuroimaging and spectroscopic findings of biotinidase deficiency. MATERIALS AND METHODS We evaluated the spectrum of neuroimaging and spectroscopic findings in four patients with biotinidase deficiency with follow-up studies in three patients. RESULTS The imaging findings were encephalopathy, low cerebral volume, ventriculomegaly and widened extracerebral CSF spaces. Uncommon findings were caudate involvement, parieto-occipital cortical abnormalities and one patient with restricted diffusion. Two patients had subdural effusions, which is uncommon in biotinidase deficiency. 1H-MR spectroscopy revealed elevated lactate, reversal of the choline/creatine ratio and decreased NAA peaks. Follow-up studies revealed complete reversal of imaging findings in two patients. CONCLUSION Biotinidase deficiency is a reversible metabolic encephalopathy. This study highlights the importance of early and prompt cliniconeuroradiological diagnosis of biotinidase deficiency as it has an extremely good clinical outcome if treatment is initiated from early infancy.
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Affiliation(s)
- Shrinivas Desai
- Department of CT and MRI, Jaslok Hospital and Research Centre, Mumbai, India
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17
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Abstract
Hearing loss is an etiologically diverse condition with many disease-related complications and major clinical, social, and quality of life implications. As the rate of acquired hearing loss secondary to environmental causes decreases and improvements in the diagnosis of abnormalities occur, the significance of genetic factors that lead to deafness increases. Advancements in molecular biology have led to improved detection and earlier intervention in patients with hearing loss. Subsequently, earlier implementation of educational services and cochlear implant technology in patients with profound hearing loss now results in superior communication skills and enhanced language development. The aim of this review is to provide a comprehensive framework underlying the causes of hearing impairment and to detail the clinical management for patients with hereditary hearing loss.
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Affiliation(s)
- Amit Kochhar
- Molecular Otolaryngology Research Laboratories, University of Iowa, Iowa City, Iowa 52242, USA
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18
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Samanich J, Lowes C, Burk R, Shanske S, Lu J, Shanske A, Morrow BE. Mutations inGJB2,GJB6, and mitochondrial DNA are rare in African American and Caribbean Hispanic individuals with hearing impairment. Am J Med Genet A 2007; 143A:830-8. [PMID: 17357124 DOI: 10.1002/ajmg.a.31668] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Autosomal recessive nonsyndromic sensorineural hearing impairment (ARNSHI) comprises 80% of familial hearing loss cases. Approximately half result from mutations in the connexin 26 (Cx26) gene, GJB2, in Caucasian populations. Heterozygous mutations in GJB2 occasionally co-occur with a deletion of part of GJB6 (connexin 30; Cx30). It is estimated that approximately 1% of deafness is maternally inherited, due to mutations in mitochondrial DNA (mtDNA). Few studies have focused on the frequency of mutations in connexins or mtDNA in African American (AA) and Caribbean Hispanic (CH) admixture populations. In this study, we performed bidirectional sequencing of the GJB2 gene and polymerase chain reaction (PCR) screening for the common GJB6 deletion, as well as PCR/RFLP analysis for three mutations in mtDNA (A1555G, A3243G, A7445G), in 109 predominantly simplex AA and CH individuals. Variations found were a 101T > C (M34T; 1/101 cases), 109G > A (V37I; 1/101), 35delG (mutation; 4/101, (3/4) of non-AA/CH ethnicity), 167delT (mutation; 1/101), 139G > T (mutation; E47X; 1/101 homozygote, consanguineous), -15C > T (1/101), 79G > A (V27I; 9/101), 380G > A (R127H; 4/101; Guyana, India, Pakistan ethnicity), 670A > C (Indeterminate; K224Q; 1/101), 503A > G (novel; K168R; 3/101) and 684C > A (novel; 1/101). All but one of the AA and CH patients had monoallelic variations. There were no hemizygous GJB6 deletions in those with monoallelic GJB2 variations. We also did not identify any patients with the three mutations in mtDNA. Bidirectional sequencing of the GJB2 gene was performed in 187 AA and Hispanic healthy individuals. Our results reveal that GJB2 mutations, GJB6 deletions, and mtDNA mutations may not be significant in these minority admixture populations.
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Affiliation(s)
- Joy Samanich
- Department of Molecular Genetics, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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19
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Genc GA, Sivri-Kalkanoğlu HS, Dursun A, Aydin HI, Tokatli A, Sennaroglu L, Belgin E, Wolf B, Coşkun T. Audiologic findings in children with biotinidase deficiency in Turkey. Int J Pediatr Otorhinolaryngol 2007; 71:333-9. [PMID: 17161472 DOI: 10.1016/j.ijporl.2006.11.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Revised: 11/01/2006] [Accepted: 11/01/2006] [Indexed: 10/23/2022]
Abstract
OBJECTIVE Biotinidase deficiency is an autosomal recessively inherited disorder characterized by neurological and cutaneous features, including sensorineural hearing loss. Although many features of the disorder are reversible following treatment with biotin, the hearing loss appears to be irreversible. In the present study, hearing status of patients with biotinidase deficiency is characterized in a Turkish population. METHODS Subjective and objective audiologic tests were performed on 20 children with profound biotinidase deficiency. RESULTS Sensorineural hearing loss occurs in approximately 55% of the children with biotinidase deficiency. The hearing loss varies in severity from mild to profound hearing loss. In children diagnosed immediately after birth because they had an older sibling with the disorder, statistically significant differences were found between ABR results and age of diagnosis (p<0.05). Greater prolongation in ABR latencies were observed in the late-diagnosed children compared to that in the early-diagnosed children (p<0.05). CONCLUSION Early diagnosis is important to prevent peripheral and central hearing loss. Children with biotinidase deficiency who have hearing loss are likely at increased risk for having speech and language problems. If hearing aids do not provide sufficient amplification, cochlear implantation may be indicated in these children. Therefore, it is important to test the hearing thresholds of these children with hearing aids and evaluate their language development.
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Affiliation(s)
- G A Genc
- Department of Ear Nose and Throat and Head and Neck Surgery, Section of Audiology, Hacettepe University Faculty of Medicine, Ankara, Turkey.
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20
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Korkmazer N, Vurucu S, Demirkaya E, Unay B, Kul M, Akin R, Gokcay E. Serum and liver tissue biotinidase enzyme activity in rats which were administrated to valproic acid. Brain Dev 2006; 28:515-20. [PMID: 16682156 DOI: 10.1016/j.braindev.2006.03.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2005] [Revised: 03/04/2006] [Accepted: 03/08/2006] [Indexed: 10/24/2022]
Abstract
Valproic acid (VPA) is an antiepileptic drug widely used and well-tolerated by most of patients. Its non-dose-dependent side effects seen mostly are the temporary gastrointestinal disturbances including anorexia and nausea, and hepatoxicity. As to its dose-dependent side effects are the weight loss, tremor, skin eruption and the alopecia. In this study we aimed to put forward the biotinidase deficiency considered as a possible cause of alopecia in the rats administered with valproic acid, and the correlation between liver and serum biotinidase enzyme activities (BEA) and transaminases, albumin and serum valproic acid levels. In our study, 4 groups of which one of them was a control group, each consisting of 15 male Wistar rats was organized. 200, 400, and 600 mg/kg/day of VPA, and distilled water, two divided doses per day, were administered per orally to VPA-1, VPA-2, VPA-3, and control group, respectively, in 60 days. Their serum and liver biotinidase enzyme activities, serum AST, ALT, albumin, and valproic acid levels were measured. Alopecia was seen in the subjects of 6.6% of VPA-1, 13.3% of VPA-2, and 26.6% of VPA-3. Significant difference in the liver tissues BEA was noted only between VPA-3 and the control group. Reductions were observed both in the liver tissues BEA and the serum BEA levels, which are inversely proportional to the VPA doses. A positive correlation between the liver biotinidase enzyme activities and the serum valproic acid levels, and the negative correlation between the liver tissues biotinidase activities and the serum valproic acid levels were noted, respectively. As a conclusion, the partial alopecia which is an initial symptom of reduced biotinidase activity may also be created depending on the reduction of biotinidase activity during valproic acid therapy. The alopecia which may further be observed in the patients receiving valproic acid therapy may be prevented by means of administration of biotin in a dose of 10 mg/day.
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Affiliation(s)
- Nadir Korkmazer
- Department of Pediatrics, Gulhane Military Medical Academy, School of Medicine, Turkey
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21
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Brumwell CL, Hossain WA, Morest DK, Wolf B. Biotinidase reveals the morphogenetic sequence in cochlea and cochlear nucleus of mice. Hear Res 2005; 209:104-21. [PMID: 16107307 DOI: 10.1016/j.heares.2005.06.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2005] [Accepted: 06/23/2005] [Indexed: 10/25/2022]
Abstract
Hearing loss affects children with biotinidase deficiency, an inherited metabolic disorder in the recycling of biotin. The deficit appears shortly after birth during development of the auditory system. Using a mouse model, we sought to discover where and when biotinidase is expressed in the normal development of the cochlea and cochlear nucleus. In the process, we reconstructed the normal morphogenetic sequences of the constituent cells. Immunolabeling for biotinidase was localized to neurons and other cells of the adult and immature mouse, including the embryonic precursors of these regions dating from the stage of the otocyst. Its distribution was compared to the particular morphological changes occurring at each developmental stage. Biotinidase was localized in cells and their processes at the critical stages in their proliferation, migration, structural differentiation, and innervation, covering the entire span of their development. The prevalence of immunostaining peaked in the adult animal, including hair cells and ganglion cells of the cochlea and neurons of the cochlear nucleus. The findings suggest that biotinidase plays a role in the normal development of the auditory system. Besides the pattern of localization of biotinidase, this study provides the first systematic account of each developmental stage in a mammalian auditory system.
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Affiliation(s)
- Craig L Brumwell
- Department of Neuroscience, University of Connecticut Health Center, Farmington, 06030-3401, USA
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22
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McKay BE, Molineux ML, Turner RW. Biotin is endogenously expressed in select regions of the rat central nervous system. J Comp Neurol 2004; 473:86-96. [PMID: 15067720 DOI: 10.1002/cne.20109] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The vitamin biotin is an endogenous molecule that acts as an important cofactor for several carboxylases in the citric acid cycle. Disorders of biotin metabolism produce neurological symptoms that range from ataxia to sensory loss, suggesting the presence of biotin in specific functional systems of the CNS. Although biotin has been described in some cells of nonmammalian nervous systems, the distribution of biotin in mammalian CNS is virtually unknown. We report the presence of biotin in select regions of rat CNS, as revealed with a monoclonal antibody directed against biotin and with avidin- and streptavidin-conjugated labels. Detectable levels of biotin were primarily found caudal to the diencephalon, with greatest expression in the cerebellar motor system and several brainstem auditory nuclei. Biotin was found as a somatic label in cerebellar Purkinje cells, in cell bodies and proximal dendrites of cerebellar deep nuclear neurons, and in red nuclear neurons. Biotin was detected in cells of the spiral ganglion, somata and proximal dendrites of cells in the cochlear nuclei, superior olivary nuclei, medial nucleus of the trapezoid body, and nucleus of the lateral lemniscus. Biotin was further found in pontine nuclei and fiber tracts, the substantia nigra pars reticulata, lateral mammillary nucleus, and a small number of hippocampal interneurons. Biotin was detected in glial cells of major tract systems throughout the brain but was most prominent in tracts of the hindbrain. Biotin is thus expressed in select regions of rat CNS with a distribution that correlates to the known clinical sequelae associated with biotin deficiencies.
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Affiliation(s)
- Bruce E McKay
- Neuroscience Research Group, University of Calgary, Calgary, Alberta T2N 4N1, Canada
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23
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Abstract
Biotinidase deficiency is a readily treatable inherited disorder. Discovery of the enzyme deficiency as the cause for late-onset multiple carboxylase deficiency initially seemed to answer almost all of the questions about the disorder. However, as is the case for most inborn errors of metabolism, finding the enzyme that causes the disorder, cloning the gene, and determining the spectrum of clinical features of the disease only opens a Pandora's box. As researchers have found, there are still many important and interesting questions about this disorder that must be addressed and answered. However, when compared with other inherited metabolic diseases, biotinidase deficiency is still one of the most readily treatable. If a child must have an inborn error of metabolism, let it be biotinidase deficiency and let it be identified by newborn screening.
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Affiliation(s)
- Barry Wolf
- Department of Pediatrics, Division of Research, Connecticut Children's Medical Center, 282 Washington Street, Hartford, CT 06106, USA.
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