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Pöschel L, Marquardt I, Schrader J, Buchhaupt M. Use of a methylotrophic organism for production of fine chemicals from methanol. CHEM-ING-TECH 2020. [DOI: 10.1002/cite.202055283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- L. Pöschel
- DECHEMA-Forschungsinstitut Industrielle Biotechnologie Theodor-Heuss-Allee 25 60486 Frankfurt Germany
| | - I. Marquardt
- DECHEMA-Forschungsinstitut Industrielle Biotechnologie Theodor-Heuss-Allee 25 60486 Frankfurt Germany
| | - J. Schrader
- DECHEMA-Forschungsinstitut Industrielle Biotechnologie Theodor-Heuss-Allee 25 60486 Frankfurt Germany
| | - M. Buchhaupt
- DECHEMA-Forschungsinstitut Industrielle Biotechnologie Theodor-Heuss-Allee 25 60486 Frankfurt Germany
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Castiglia L, Husain RA, Marquardt I, Fink C, Liehr T, Serino D, Elia M, Coci EG. 7q11.23 microduplication syndrome: neurophysiological and neuroradiological insights into a rare chromosomal disorder. J Intellect Disabil Res 2018; 62:359-370. [PMID: 29266505 DOI: 10.1111/jir.12457] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 10/09/2017] [Accepted: 11/10/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND The phenotypical consequence of the heterozygous chromosome 7q11.23 interstitial microdeletion is the Williams-Beuren syndrome, a very well-known genetic multi-systemic disorder. Much less is known about the reverse condition, the heterozygous interstitial microduplication of 7q11.23 region. The first molecular cytogenetic description was published in 2005, and only after several years were the reported patients numerous enough to attempt a description of a common phenotype. METHOD By using a broad multidisciplinary approach, we investigated 12 patients with this rare genetic anomaly. Ten of them harboured the duplication of the classical Williams-Beuren syndrome region and two a slightly larger duplication. Upon a detailed description of the clinical and psychological features, we used electroencephalography and magnetic resonance imaging to explore neurophysiological function and brain structures. RESULTS We analysed the clinical, psychological, neuroradiological and neurophysiological features of 12 yet-unpublished individuals affected by this rare genetic anomaly, focusing specifically on the last two aspects. Several structural abnormalities of the central nervous system were detected, like ventriculomegaly, hypotrophic cerebellum, hypotrophic corpus callosum and hypoplastic temporal lobes. Although only one of 12 individuals suffered from seizures during childhood, three others had abnormal electroencephalography findings prominent in the anterior brain regions, without any visible seizures to date. CONCLUSION Taken together, we enlarged the yet-underrepresented cohort in the literature of patients affected by 7q11.23 microduplication syndrome and shed further light on neuroradiological and neurophysiological aspects of this rare genetic syndrome.
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Affiliation(s)
- L Castiglia
- Oasi Institute for Research on Mental Retardation and Brain, Troina, Enna, Italy
| | - R A Husain
- Department of Neuropediatrics, Universitätsklinikum Jena, Jena, Thuringia, Germany
| | - I Marquardt
- Department of Neuropediatrics, Klinikum Oldenburg, Oldenburg, Lower Saxony, Germany
| | - C Fink
- Department of Radiology, Allgemeines Krankenhaus Celle, Celle, Lower Saxony, Germany
| | - T Liehr
- Institute of Human Genetics, Friedrich-Schiller-Universität Jena, Jena, Thuringia, Germany
| | - D Serino
- Department of Pediatric Neuro-Psichiatry, ASL CN1, Cuneo, Piedmont, Italy
| | - M Elia
- Oasi Institute for Research on Mental Retardation and Brain, Troina, Enna, Italy
| | - E G Coci
- Department of Paediatrics, Städtisches Klinikum Braunschweig, Braunschweig, Lower Saxony, Germany
- Department of Neuropediatrics, Universitaetsklinikum Bochum, Ruhr-Universitaet Bochum, Bochum, North Rhine-Westphalia, Germany
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Danew P, Friedrich E, Fair W, Marquardt I, Aurich H, Haschen RJ. Abbau und Assimilation von Glukose und Aminosäuren durch Microsporum gypseum: Degradation and Assimilation of Glucose and Amino Acids by Microsporum gypseum. Mycoses 2012. [DOI: 10.1111/j.1439-0507.1982.tb02730.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Danew P, Marquardt I, Friedrich E, Aurich H. Aminosäureassimilatin und -sekretion bei Dermatophyten 1. Mitteilung: Vergleichende Untersuchungen bei Microsporum gypseum, Trichophyton rubrum und Trichophyton mentagrophytes: Amino Acid Assimilation and Secretion in Dermatophytes 1st Part: Comparative I. Mycoses 2009. [DOI: 10.1111/j.1439-0507.1980.tb02576.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Danew P, Marquardt I, Friedrich E, Aurich H. Aminosäureassimilation und -sekretion bei Dermatophyten 2. Mitteilung: Aminosäureabbau und Myzelwachstum bei Microsporum gypseum nach Wachstum in Nährlösung mit verschiedenen Aminosäuren. Mycoses 2009. [DOI: 10.1111/j.1439-0507.1981.tb01911.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Illsinger S, Marquardt I, Lücke T, Hellerud C, Korenke C, Das AM. Two cases of isolated glycerol kinase deficiency with heterogeneous neurological symptoms. Dev Med Child Neurol 2007; 49:396-7. [PMID: 17489818 DOI: 10.1111/j.1469-8749.2007.00396.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mercimek-Mahmutoglu S, Stoeckler-Ipsiroglu S, Adami A, Appleton R, Araújo HC, Duran M, Ensenauer R, Fernandez-Alvarez E, Garcia P, Grolik C, Item CB, Leuzzi V, Marquardt I, Mühl A, Saelke-Kellermann RA, Salomons GS, Schulze A, Surtees R, van der Knaap MS, Vasconcelos R, Verhoeven NM, Vilarinho L, Wilichowski E, Jakobs C. GAMT deficiency: Features, treatment, and outcome in an inborn error of creatine synthesis. Neurology 2006; 67:480-4. [PMID: 16855203 DOI: 10.1212/01.wnl.0000234852.43688.bf] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Guanidinoactetate methyltransferase (GAMT) deficiency is an autosomal recessive disorder of creatine synthesis. The authors analyzed clinical, biochemical, and molecular findings in 27 patients. METHODS The authors collected data from questionnaires and literature reports. A score including degree of intellectual disability, epileptic seizures, and movement disorder was developed and used to classify clinical phenotype as severe, moderate, or mild. Score and biochemical data were assessed before and during treatment with oral creatine substitution alone or with additional dietary arginine restriction and ornithine supplementation. RESULTS Intellectual disability, epileptic seizures, guanidinoacetate accumulation in body fluids, and deficiency of brain creatine were common in all 27 patients. Twelve patients had severe, 12 patients had moderate, and three patients had mild clinical phenotype. Twenty-one of 27 (78%) patients had severe intellectual disability (estimated IQ 20 to 34). There was no obvious correlation between severity of the clinical phenotype, guanidinoacetate accumulation in body fluids, and GAMT mutations. Treatment resulted in almost normalized cerebral creatine levels, reduced guanidinoacetate accumulation, and in improvement of epilepsy and movement disorder, whereas the degree of intellectual disability remained unchanged. CONCLUSION Guanidinoactetate methyltransferase deficiency should be considered in patients with unexplained intellectual disability, and urinary guanidinoacetate should be determined as an initial diagnostic approach.
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Affiliation(s)
- S Mercimek-Mahmutoglu
- Division of Biochemical Diseases, British Columbia Children's Hospital, Vancouver, Canada
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Heldt K, Schwahn B, Marquardt I, Grotzke M, Wendel U. Diagnosis of MSUD by newborn screening allows early intervention without extraneous detoxification. Mol Genet Metab 2005; 84:313-6. [PMID: 15781191 DOI: 10.1016/j.ymgme.2004.11.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2004] [Revised: 11/25/2004] [Accepted: 11/30/2004] [Indexed: 10/25/2022]
Abstract
Maple syrup urine disease (MSUD) is a genetic metabolic disorder resulting from the defective activity of branched-chain 2-ketoacid dehydrogenase complex. Due to the metabolic block, high concentrations of the branched-chain amino acids (BCAA) leucine, valine, isoleucine, and allo-isoleucine as well as their corresponding branched-chain 2-keto acids accumulate in patients on a BCAA-unrestricted diet or during episodes with increased protein catabolism. Early diagnosis and management are essential to prevent permanent brain damage. Newborn screening by tandem MS allows for detection of elevated BCAA concentrations in blood in patients with classical MSUD before they show severe encephalopathic symptoms. Here, we report that newborn screening by expanded tandem MS enables for reversing the intoxication in newborns with MSUD within 24-48 h without any need for extraneous detoxification and thus decreasing the risk of brain damage during a particularly vulnerable period.
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Affiliation(s)
- K Heldt
- Clinic for General Pediatrics, University Children's Hospital Düsseldorf, Moorenstr. 5, 40225 Düsseldorf, Germany.
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Michel-Behnke I, Akintuerk H, Marquardt I, Mueller M, Thul J, Bauer J, Hagel KJ, Kreuder J, Vogt P, Schranz D. Stenting of the ductus arteriosus and banding of the pulmonary arteries: basis for various surgical strategies in newborns with multiple left heart obstructive lesions. Heart 2003; 89:645-50. [PMID: 12748222 PMCID: PMC1767699 DOI: 10.1136/heart.89.6.645] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
OBJECTIVE To present an institutional experience with stent placement in the arterial duct combined with bilateral banding of the pulmonary artery branches as a basis for various surgical strategies in newborns with hypoplastic left heart obstructive lesions. DESIGN Observational study. SETTING Paediatric heart centre in a university hospital. PATIENTS 20 newborns with various forms of left heart obstructive lesions and duct dependent systemic blood flow. INTERVENTIONS Patients underwent percutaneous ductal stenting and surgical bilateral pulmonary artery banding. Atrial septotomy by balloon dilatation was performed as required, in one premature baby by the transhepatic approach. MAIN OUTCOME MEASURES Survival; numbers of and reasons for palliative and corrective cardiac surgery. RESULTS One patient died immediately after percutaneous ductal stenting. One patient died in connection with the surgical approach of bilateral pulmonary banding. Stent and ductal patency were achieved for up to 331 days. Two patients underwent heart transplantation and two patients died on the waiting list. Ten patients had a palliative one stage procedure with reconstruction of the aortic arch and bidirectional cavopulmonary connection at the age of 3.5-6 months. There was one death. One patient is still awaiting this approach. Two patients received biventricular repair. In one, biventricular repair will soon be provided. CONCLUSIONS Stenting the arterial duct combined with bilateral pulmonary artery banding in newborns with hypoplastic left heart or multiple left heart obstructive lesions allows a broad variation of surgical strategies depending on morphological findings, postnatal clinical conditions, and potential ventricular growth.
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Affiliation(s)
- I Michel-Behnke
- Paediatric Heart Centre, Justus-Liebig University Giessen, Giessen, Germany. Ina.Michel-Behnke.@paediat.med.uni-giessen.de
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Coenen MJ, van den Heuvel LP, Nijtmans LG, Morava E, Marquardt I, Girschick HJ, Trijbels FJ, Grivell LA, Smeitink JA. SURFEIT-1 gene analysis and two-dimensional blue native gel electrophoresis in cytochrome c oxidase deficiency. Biochem Biophys Res Commun 1999; 265:339-44. [PMID: 10558868 DOI: 10.1006/bbrc.1999.1662] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Leigh syndrome, a progressive, often fatal, neurodegenerative disorder, is frequently associated with a deficiency in the activity of cytochrome c oxidase (COX), the last enzyme of the mitochondrial respiratory chain. In contrast to NADH:ubiquinone oxidoreductase and succinate dehydrogenase deficiencies, no mutations in nuclear genes encoding COX subunits have been identified thus far. Very recently, however, a Leigh syndrome complementation group has been identified which showed mutations in the SURFEIT-1 (SURF-1) gene. The results of a mutational detection study in 16 new randomly selected COX-deficient patients revealed a new mutation (C688T) in 2 patients and the earlier reported 845delCT mutation in 2 additional patients. In addition, we evaluated the diagnostic value of two-dimensional blue native gel electrophoresis. We show that this technique reveals distinct patterns of both fully and partially assembled COX complexes and is thereby capable of discrimination between COX-deficient SURF-1 and non-SURF-1-mutated patients.
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Affiliation(s)
- M J Coenen
- Department of Paediatrics, Nijmegen Centre for Mitochondrial Disorders, University Hospital St. Radboud, Nijmegen, 6500 HB, The Netherlands
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Dietrich GV, Schueck R, Menges T, Kiesenbauer NP, Fruehauf AC, Marquardt I. Comparison of four methods for the determination of platelet function in whole blood in cardiac surgery. Thromb Res 1998; 89:295-301. [PMID: 9669752 DOI: 10.1016/s0049-3848(98)00020-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- G V Dietrich
- Department of Anaesthesiology and Intensive Care Medicine, Justus-Liebig-University, Giessen, Germany.
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Abstract
In a patient with extrapyramidal movement disorder and extremely low creatinine concentrations in serum and urine, in vivo proton magnetic resonance spectroscopy disclosed a generalized depletion of creatinine in the brain. Oral substitution of arginine, a substrate for creatine synthesis, resulted in an increase of brain guanidinoacetate as the immediate precursor of creatine but did not elevate cerebral creatine levels. In contrast, oral substitution of creatine-monohydrate led to a significant increase of brain creatine, a decrease of brain guanidinoacetate, and a normalization of creatinine in serum and urine. Phosphorus magnetic resonance spectroscopy of the brain revealed no detectable creatine-phosphate before oral substitution of creatine and a significant increase afterward. Partial restoration of cerebral creatine concentrations was accompanied by improvement of the patient's neurologic symptoms. This is the first report of a patient with complete creatine deficiency in the brain. Magnetic resonance spectroscopy during arginine and creatine treatment point to an inborn error of creatine biosynthesis at the level of guanidinoacetete-methyltransferase.
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Affiliation(s)
- S Stöckler
- Kinderklinik, Universität Göttingen, Germany
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Danew P, Friedrich E, Farr W, Marquardt I, Aurich H, Haschen RJ. [Degradation and assimilation of glucose and amino acids by Microsporum gypseum (author's transl)]. Mykosen 1982; 25:143-50. [PMID: 6123946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Danew P, Marquardt I, Friedrich E, Aurich H. [Amino acid assimilation and secretion in dermatophytes. 2nd part: Amino acid catabolism and mycelial growth in Microsporum gypseum after cultivation in culture media containing different amino acids (author's transl)]. Mykosen 1981; 24:561-5. [PMID: 6117010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Danew P, Marquardt I, Friedrich E, Aurich H. [Amino acid assimilation and secretion in dermatophytes 1st part: comparative investigations in Microsporum gypseum, Trichophyton rubrum and Trichophyton mentagrophytes]. Mykosen 1980; 23:632-639. [PMID: 7464856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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Weber E, Frenzel J, Marquardt I, Glässer D. Amino acid composition of the crystallized RNA-containing protein from pig-eye lenses. FEBS Lett 1977; 77:87-8. [PMID: 858393 DOI: 10.1016/0014-5793(77)80198-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Koelsch R, Lasch J, Marquardt I, Hanson H. Application of spectrophotometric methods to the determination of protein bound to agarose beads. Anal Biochem 1975; 66:556-67. [PMID: 1137112 DOI: 10.1016/0003-2697(75)90623-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Abstract
In the present paper the reactivity of histidyl residues of leucine aminopeptidase from bovine eye lens was studied by dye-sensitized photooxidation and by carbethoxylation of the enzyme protein using diethylpyrocarbonate. Of all the different amino acids modified by photooxidation only histidine is connected with the enzymic acticity, whereas tyrosine seems to be involved in structure stabilization. By changing the pH and varying the effectors (Mg2+ and/or dodecylsulfate) of the reaction mixture a different number of histidyl residues of the enzyme protein is caused to react with diethylpyrocarbonate. No secondary reactions with tyrosyl or tryptophyl residues could be observed by spectrophotometric investigations. The enzyme modified by one of the above-mentioned methods shows changes in the capacity of Mn2+ binding measured by autoradiography as well as in the degree of enhancement of enzymic activity by Mn2+ or Mg2+ ions. Of the 48 histidyl residues of the enzyme (Mr = 326000) up to 2 histidyl residues per subunit (Mr = 54000) may be involved in Mn2+ or Mg2+ binding and up to 4 histidyl residues have a strong influence on Zn2+ binding.
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Ansorge S, Bohley P, Kirschke H, Langner J, Marquardt I, Wiederanders B, Hanson H. The identity of the insulin degrading thiol-protein disulfide oxidoreductase (glutathione-insulin transhydrogenase) with the sulfhydryl-disulfide interchange enzyme. FEBS Lett 1973; 37:238-40. [PMID: 4763327 DOI: 10.1016/0014-5793(73)80468-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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