64 results on '"H. Möllmann"'
Search Results
2. An Investigation on the Factors that Affect Sizing in Two Generations of Self-Expandable Transcatheter Valves and Their Influence on Paravalvular Regurgitation (PVR)
- Author
-
D. Serio, M. Renker, J. Blumenstein, H. Möllmann, C. Eckel, C. Grothusen, V. Tiyerili, Y. H. Choi, C. Hamm, W. K. Kim, and E. Charitos
- Published
- 2023
- Full Text
- View/download PDF
3. Surgical Aortic Valve Replacement in Patients Aged 50 to 69 Years: Insights from the German Aortic Valve Registry (GARY)
- Author
-
F. Vogt, G. Santarpino, B. Fujita, C. Frerker, T. Bauer, R. Bekeredjian, S. Bleiziffer, A. Beckmann, H. Möllmann, T. Walther, F. Beyersdorf, C. Hamm, A. Böning, S. Baldus, S. Ensminger, T. Fischlein, and D. Eckner
- Published
- 2022
- Full Text
- View/download PDF
4. Addendum zum Positionspapier der Deutschen Gesellschaft für Kardiologie 'Interventionelle Therapie von AV-Klappenerkrankungen – Kriterien für die Zertifizierung von Mitralklappenzentren'
- Author
-
S. Baldus, R. S. v. Bardeleben, H. Eggebrecht, A. Elsässer, J. Hausleiter, H. Ince, M. Kelm, K. H. Kuck, E. Lubos, H. Nef, P. Raake, A. Rillig, V. Rudolph, P. C. Schulze, A. Schlitt, C. Stellbrink, and H. Möllmann
- Subjects
Cardiology and Cardiovascular Medicine - Published
- 2022
- Full Text
- View/download PDF
5. Bifurkationsläsionen
- Author
-
H. Möllmann, O. Dörr, H. M. Nef, and A. Elsässer
- Subjects
03 medical and health sciences ,0302 clinical medicine ,030212 general & internal medicine ,030204 cardiovascular system & hematology ,Cardiology and Cardiovascular Medicine - Abstract
Die Bifurkationsbehandlung stellt eine alltagliche interventionelle Herausforderung hinsichtlich Strategie und Technik dar. Deshalb ist die Einhaltung einfacher Regeln der Grundstein fur einen langanhaltenden Prozedurerfolg. Entscheidend fur die Auswahl der richtigen Strategie ist eine ausreichende Beurteilung der Bifurkationslasion hinsichtlich Seitastrelevanz, Gefasdiameter und Abgangswinkel des Seitasts. Die Evaluierung einer Bifurkationsstenose kann unter Beachtung der bekannten Limitationen durch die fraktionelle Flussreserve (FFR) erleichtert werden. Bildgebende Verfahren konnen die Strategie einer Bifurkationsbehandlung mitbeeinflussen.
- Published
- 2016
- Full Text
- View/download PDF
6. Revaskularisation bei schlechter LV-Funktion
- Author
-
H. Dörge and H. Möllmann
- Subjects
Gynecology ,medicine.medical_specialty ,business.industry ,medicine ,General Medicine ,business - Abstract
Die Prognose von Patienten mit eingeschrankter linksventrikularer Funktion und interventionsbedurftiger koronarer Herzerkrankung ist deutlich eingeschrankt. Fruhe Studien zum Vergleich medikamentoser mit operativer Therapie haben nachgewiesen, dass gerade diese Hochrisikopatienten von einer kompletten Revaskularisierung profitieren. Die Datenlage ist deutlich dunner fur den Vergleich zwischen den beiden Revaskularisationsmethoden PCI und Bypassoperation. Dies liegt vor allen daran, dass in den meisten Studien eine eingeschrankte linksventrikulare Funktion als Ausschlusskriterium definiert ist. Dementsprechend mussen hier Ergebnisse aus anderen Patientenkollektiven extrapoliert werden. Komplexe Koronaranatomien mit multiplen Stenosen und hoher Wahrscheinlichkeit groser Stentlangen sollten demnach genauso wie Diabetiker eher chirurgisch versorgt werden. Die PCI kann bei geringerer Stenosekomplexitat eine wertvolle und weniger invasive Alternative sein. Um eine moglichst optimale Behandlung fur diese haufig schwerkranken Patienten zu gewahrleisten, sollte eine individuelle Therapiefestlegung durch das Heart Team erfolgen.
- Published
- 2015
- Full Text
- View/download PDF
7. Myokardrevaskularisation
- Author
-
H. Möllmann, S. Szardien, J. Kempfert, H. Nef, C. Liebetrau, T. Walther, and C. Hamm
- Subjects
Cardiology and Cardiovascular Medicine - Published
- 2013
- Full Text
- View/download PDF
8. Validität von Biomarkern zur Abschätzung des perioperativen Myokardischämierisikos
- Author
-
H. Möllmann, C. Liebetrau, H. Nef, and Oliver Dörr
- Subjects
Gynecology ,medicine.medical_specialty ,business.industry ,medicine ,Surgery ,Natriuretische peptide ,Cardiology and Cardiovascular Medicine ,business - Abstract
Die perioperative Myokardischamie ist bei gefaschirurgischen Eingriffen haufig und prognostisch relevant. Myokardiale Biomarker konnen die perioperative Risikostratifizierung zusatzlich zu etablierten Risikoscores verbessern. Basierend auf einer selektiven Literaturrecherche unter Berucksichtigung von in PubMed gelisteten Originalpublikationen und Metaanalysen aus den Jahren 2000–2013 zur Ursache, Diagnose und Therapie von periprozeduraler Myokardischamie sowie von Leitlinien nationaler und internationaler Fachgesellschaften wird eine Ubersicht uber aktuelle Arbeiten zur Validitat von Biomarkern zur Abschatzung des perioperativen Myokardischamierisikos gegeben. Die wissenschaftliche Literatur zur perioperativen Myokardischamie besteht im Wesentlichen aus monozentrischen, retrospektiven Untersuchungen. Es existieren nur wenige prospektiv randomisierte Studien oder strukturierte Reviews. Die Inzidenz der perioperativen Myokardischamie liegt zwischen 11 und 47 %. In den letzten Jahrzehnten wurde eine Vielzahl verschiedener Scores zur individuellen Risikostratifizierung entwickelt. Biomarker, insbesondere die kardialen Troponine, stellen jedoch teilweise die einzige Moglichkeit zur periprozeduralen Ischamiediagnostik dar. Durch die hohe Sensitivitat der neueren Troponinassays ist die Erkennung von geringem myokardialen Zelluntergang und somit eine schnellere Diagnosestellung und Behandlung moglich. Die perioperative Myokardischamie muss unbedingt erkannt und behandelt werden, um die langfristig begleitende Morbiditat und Mortalitat zu verringern. Die hochsensitive Troponinbestimmung bietet hierbei eine mogliche Schlusselrolle in der adaquaten Patientenversorgung.
- Published
- 2013
- Full Text
- View/download PDF
9. Der Einfluß von Parachlorphenylalanin und Testosteron auf das sexuelle Verhalten weiblicher Ratten
- Author
-
Doz. Dr. med. H. Möllmann, S. Moltzahn, and K. Plischewsky
- Subjects
Gynecology ,medicine.medical_specialty ,Endocrinology ,Chemistry ,Urology ,Testosterone enanthate ,medicine ,General Medicine ,Serotonin - Abstract
Zusammenfassung Nach viertagiger Applikation von Parachlorphenylalanin (PCPA) (PCPA-methyl-ester ˙ HCl 100 mg/kg tagl., i. p.) konnte bei weiblichen Ratten eine Hypersexualitat ausgelost werden, die durch Kombination von PCPA mit Testosteron (Testosterononanthat 1,4 mg/kg tagl., i. m.) erheblich gesteigert wurde. Als Ursache wird der Ausfall der inhibitorischen Wirkung des Serotonins auf die hypothalamisch-hypophysaren Regulationszentren diskutiert. Gestutzt wird diese Auffassung durch den Nachweis einer Anreicherung von 14C-markiertem PCPA in den die Sexualitat beeinflussenden Arealen des Gehirns. Summary Female rats treated with parachlorophenylalanine (PCPA) (PCPA-methyl-ester ˙ HCl 100 mg/kg P. D., i. p.) for four days, exhibited hypersexuality which was potentiated by combination of PCPA and testosterone (testosterone enanthate 1,4 mg/kg P. D., i. m.). This effect can be explained by loss of the inhibitory function of serotonin on the hypothalamo-hypophysial system. This interpretation is supported by the findings, that 14C labeled PCPA is accumulated in those centres of brain influencing sexuality. Resume L'administration de la parachlorphenylalanine (PCPA) (Methylester de la PCPA 100 mg/kg par jour, i. p.) aux rats femelles provoque une hypersexualite qui est augmentee par la combinaison de PCPA et de testosterone (Enanthate de la testosterone 1,4 mg/kg par jour, i. m.). Ces manifestations suggerent comme mode d'action une suppression de l'inhibition de la serotonine sur les centres hypothalamo-hypophysaires. Cette interpretation est affirmee par la preuve d'une accumulation de la PCPA marquee au 14C dans les centres du cerveau influant sur la sexualite. Fur wertvolle technische Mitarbeit danken wir K. Wilp und B. Remki.
- Published
- 2009
- Full Text
- View/download PDF
10. Einfluß von p-Chlorphenylalanin auf Hoden- und Nebenhodenplasmalogene von Ratten
- Author
-
J. Kindler and H. Möllmann
- Subjects
Endocrinology ,Urology ,General Medicine - Abstract
Zusammenfassung Der Plasmalogengehalt im Hoden- und Nebenhodengewebe von Ratten nach einer durch p-Chlorphenylalanin induzierten hypersexuellen Phase wurde histochemisch, fluoreszenzmikroskopisch und quantitativ-chemisch untersucht. Der dabei auftretende Plasmalogenabfall konnte histochemisch erfast und durch quantitativ-chemische Bestimmungen statistisch gesichert werden. Als Ursache wird die extrem gesteigerte Gewebsaktivitat und der damit verbundene erhohte O2-Verbrauch in diesen Organen diskutiert. Es kann daher angenommen werden, das die im Spermaplasma vorhandene Fruktose fur die Energiebereitstellung nicht ausreicht, so das durch Oxydation von Plasmalogenfettsauren dieses Defizit gedeckt werden kann. Resume Le content des plasmalogenes dans le testicule et dans l'epididyme des rats est examine par la microscopie fluorescente et par des methodes histochimiques et chimiques pendant une phase hypersexuelle provoquee par la parachlorphenylalanine. Une diminution des plasmalogenes est demontree par des methodes histochimiques qui est affirmee statistiquement par des methodes chimiques. La cause pour la diminution des plasmalogenes dans ces organes peut etre l'activite du tissu extremement intensifiee et la consommation d'oxygene augmentee. Il est suppose que le fructose du plasma du sperme est insuffisant pour l'approvisionnement en energie. Le deficit peut etre comble par l'oxydation des acids grasses des plasmalogenes.
- Published
- 2009
- Full Text
- View/download PDF
11. Effects of 2-Deoxy-d-Glucose on Proliferation of Vascular Smooth Muscle Cells and Endothelial Cells
- Author
-
H. Möllmann, C Hamm, Albrecht Elsässer, Christian Troidl, Sandra Voss, Michael Weber, Achim M. Vogt, H. M. Nef, and A Joseph
- Subjects
medicine.medical_specialty ,Vascular smooth muscle ,Antimetabolites ,Swine ,Myocytes, Smooth Muscle ,Deoxyglucose ,Biology ,Inhibitory postsynaptic potential ,Biochemistry ,Muscle, Smooth, Vascular ,chemistry.chemical_compound ,medicine.artery ,Internal medicine ,medicine ,Animals ,Myocyte ,Aorta ,Cell Proliferation ,Dose-Response Relationship, Drug ,Cell growth ,Biochemistry (medical) ,Endothelial Cells ,Cell Biology ,General Medicine ,Cell biology ,Dose–response relationship ,Endocrinology ,chemistry ,Cell culture ,2-Deoxy-D-glucose - Abstract
2-Deoxy-d-glucose (2-DG) is a glucose analogue that has been proposed for cancer therapy due to its cytostatic properties. Its effect on the proliferation of smooth muscle cells and endothelial cells has not been fully clarified. The aims of this study were to investigate the effects of 2-DG on the proliferation of porcine aortic endothelial cells (PAEC) and porcine smooth muscle cells (PSMC), to establish an overview of its dose-dependent inhibitory capacity and to examine whether the short-term incubation of cells with 2-DG has an impact on cell proliferation in culture. Our results showed a dose-dependent significant inhibitory effect on proliferation, which was more pronounced in PSMC than in PAEC. Even after short-term incubation of cells with 2-DG, relevant inhibition of proliferation was documented. The clinical application of 2-DG might be a promising concept by inhibiting cells that show a potentially rapid proliferation in response to non-malignant stimuli, such as smooth muscle cells after intracoronary stenting.
- Published
- 2008
- Full Text
- View/download PDF
12. Surfactant Protein-B Proformen als mögliche neue Serumbiomarker bei Idiopathischer Pulmonaler Fibrose
- Author
-
H Nef, Clemens Ruppert, W Seeger, L Hirschbach, Malgorzata Wygrecka, Andreas Guenther, H Möllmann, and P. Markart
- Subjects
Pulmonary and Respiratory Medicine - Published
- 2014
- Full Text
- View/download PDF
13. Quantitative Micro-CT der forcierten Osteoporoseinduktion durch Ovariektomie und multidefiziente Diät
- Author
-
Alexander C. Langheinrich, Gudrun Schlewitz, Christian Heiss, A Ignatius, Marian Kampschulte, L Duerselen, M Faulenbach, Reinhard Schnettler, Gabriele A. Krombach, and H Möllmann
- Subjects
Radiology, Nuclear Medicine and imaging - Published
- 2013
- Full Text
- View/download PDF
14. Clinical outcome of patients treated with an early invasive strategy after out-of-hospital cardiac arrest
- Author
-
Albrecht Elsässer, Michael Weber, H. Möllmann, H. M. Nef, Sebastian Szardien, C Hamm, Andreas Rolf, Johannes Rixe, and C. Liebetrau
- Subjects
Male ,medicine.medical_specialty ,Invasive strategy ,Resuscitation ,medicine.medical_treatment ,Blood Pressure ,Kaplan-Meier Estimate ,Biochemistry ,Risk Assessment ,Out of hospital cardiac arrest ,Heart Rate ,Internal medicine ,Germany ,medicine ,Humans ,In patient ,Acute Coronary Syndrome ,Cardiac catheterization ,Aged ,business.industry ,Biochemistry (medical) ,Stroke Volume ,Cell Biology ,General Medicine ,Middle Aged ,Cardiopulmonary Resuscitation ,Hospitalization ,Treatment Outcome ,Emergency medicine ,Cardiology ,Female ,business ,Biomarkers ,Out-of-Hospital Cardiac Arrest - Abstract
Little is known about the impact of early invasive treatment in patients following out-of-hospital cardiac arrest (OHCA). The present study investigated the clinical characteristics and long-term prognosis of 1254 patients with suspected acute coronary syndrome, including 65 with OHCA who underwent successful cardiopulmonary resuscitation (CPR) and 1189 patients who did not require CRP. All patients underwent immediate coronary angiography even if clear signs of myocardial infarction (MI) were absent. The incidence of ST-elevation and non-ST-elevation MI did not differ between the two groups. Cardiac biomarkers were significantly higher in CPR patients despite a shorter period from symptom onset to admission. The 6-month mortality rate was 29% in the CPR group and 4% in the non-CPR group, with > 90% of fatalities occurring ≤ 3 weeks after admission. In summary, early invasive treatment leads to a considerably reduced mortality and improved prognosis in patients after OHCA.
- Published
- 2012
15. DynaCT guided anatomical rotation of the SAPIEN XT™ valve during transapical aortic valve implantation – proof of concept
- Author
-
J Blumenstein, A Van Linden, H Möllmann, A Rastan, D Holzey, FW Mohr, J Kempfert, and T Walther
- Subjects
Pulmonary and Respiratory Medicine ,Surgery ,Cardiology and Cardiovascular Medicine - Published
- 2012
- Full Text
- View/download PDF
16. Optimized therapeutic ratio of inhaled corticosteroids using retrometabolism
- Author
-
H, Derendorf, G, Hochhaus, S, Krishnaswami, B, Meibohm, and H, Möllmann
- Subjects
Hydrocortisone ,Adrenal Cortex Hormones ,Area Under Curve ,Depression, Chemical ,Administration, Inhalation ,Humans ,Models, Biological ,Algorithms - Abstract
During recent years, the treatment of pulmonary diseases could be significantly improved due to the introduction of modern retrometabolism-based corticosteroids with improved therapeutic ratio. It is the goal of all inhaled corticosteroids to produce long lasting therapeutic effects at the pulmonary target site and to minimize systemic side effects by rapid clearance of the absorbed drug and low oral bioavailability. The development of PK/PD models allows predictions of drug effects based on the administered dose. For example, the cumulative suppression of endogenous cortisol release (CCS) as one of the major systemic side effects of inhaled corticosteroid therapy can be described with an integrated Emax based PK/PD model. In order to assess the predictive power of this model, a study was conducted to compare the PK/PD-based predictions with CCS data obtained from actual clinical trials for flunisolide, fluticasone propionate, budesonide and triamcinolone acetonide. CCS was predicted for different single doses from different inhaler devices for each drug and a good correlation was observed. Thus, the presented PK/PD model proved to be a valid tool for predicting CCS of inhaled corticosteroids. By fully understanding the underlying mechanisms it will be possible to further improve their therapeutic index.
- Published
- 2000
17. A pharmacokinetic/pharmacodynamic approach to predict the cumulative cortisol suppression of inhaled corticosteroids
- Author
-
B, Meibohm, G, Hochhaus, H, Möllmann, J, Barth, M, Wagner, M, Krieg, R, Stöckmann, and H, Derendorf
- Subjects
Hydrocortisone ,Adrenal Cortex Hormones ,Area Under Curve ,Depression, Chemical ,Administration, Inhalation ,Humans ,Models, Biological ,Algorithms - Abstract
The suppression of endogenous cortisol release is one of the major systemic side effects of inhaled corticosteroids in the treatment of asthma. The circadian rhythm of the endogenous cortisol release and the resulting plasma concentrations as well as the release suppression during corticosteroid therapy could previously be described with an integrated PK/PD model. Based on this model, a PK/PD approach was developed to quantify and predict the cumulative cortisol suppression (CCS) as a surrogate marker for the systemic activity of inhaled corticosteroid therapy. The presented method was applied to predict CCS after single doses and during short-term multiple dosing of the inhaled corticosteroids flunisolide (FLU), fluticasone propionate (FP), and triamcinolone acetonide (TCA), and after oral methylprednisolone as systemic reference therapy. Drug-specific PK and PD parameters were obtained from previous single-dose studies and extrapolated to the multiple-dose situation. For single dosing, a similar CCS within the range of 16-21% was predicted for FP 250 micrograms, FLU 500 micrograms, and TCA 1000 micrograms. For multiple dosing, a respective CCS of 28-33% was calculated for FLU 500 micrograms bid, FP 250 micrograms, bid, and TCA 1000 micrograms bid. Higher cortisol suppression compared to these single and multiple dosing regimens of the inhaled corticosteroids was predicted after oral doses of only 1 mg and 2 mg methylprednisolone, respectively. The predictive power of the approach was evaluated by comparing the PK/PD-based simulations with data reported previously in clinical studies. The predicted CCS values were in good correlation with the clinically observed results. Hence, the presented PK/PD approach allows valid predictions of CCS for single and short-term multiple dosing of inhaled corticosteroids and facilitates comparisons between different dosing regimens and steroids.
- Published
- 1999
18. Mechanism-based PK/PD model for the lymphocytopenia induced by endogenous and exogenous corticosteroids
- Author
-
B, Meibohm, H, Derendorf, H, Möllmann, P, Fröhlich, A, Tromm, M, Wagner, S, Homrighausen, M, Krieg, and G, Hochhaus
- Subjects
Placebos ,Dose-Response Relationship, Drug ,Hydrocortisone ,Lymphopenia ,Anti-Inflammatory Agents ,Humans ,Lymphocyte Count ,Lymphocytes ,Budesonide ,Models, Biological ,Circadian Rhythm ,Protein Binding - Abstract
Lymphocytopenia is a sensitive surrogate marker for the immunological effects of corticosteroids. This pharmacokinetic/pharmacodynamic (PK/PD) study investigated whether the circadian variation of blood lymphocytes observed after placebo is secondary to the circadian rhythm of endogenous cortisol, and developed based on this relationship an improved PK/PD model for a more sensitive description of the effect of low-dose corticosteroid therapy on blood lymphocytes considering the net activity of the exogenous corticosteroid budesonide and endogenous cortisol.In an open, parallel study design, 3 mg oral budesonide or placebo were given at 8.00 a.m., 4.00 p.m. and midnight to two groups of 12 volunteers. Lymphocyte counts and serum concentrations of budesonide and cortisol were monitored for 24 hours. A mechanism-based PK/PD model which considered the non-linear protein binding of cortisol and the budesonide-induced cortisol suppression was employed to relate changes in blood lymphocytes to free cortisol levels after placebo and to the net activity of free budesonide and free endogenous cortisol after active treatment.The circadian rhythm of blood lymphocytes observed after placebo could inversely be related to the circadian rhythm of serum cortisol. After budesonide administration, lymphocyte counts could accurately be linked to the net activity of budesonide and endogenous cortisol. The resulting EC50 values for the effect of budesonide on cortisol, budesonide on lymphocytes and cortisol on lymphocytes were 0.063 +/- 0.034, 0.22 +/- 0.13 and 26.3 +/- 15.0 ng/ml (placebo group 15.4 +/- 3.4 ng/ml), respectively.The presented mechanism-based PK/PD model suggests that blood lymphocytes are under physiological control of cortisol. It further indicates that endogenous and exogenous corticosteroids and their pharmacological interaction need to be considered for modeling the effects of low doses of exogenous corticosteroids on the immune system.
- Published
- 1999
19. Clinical PK/PD modelling as a tool in drug development of corticosteroids
- Author
-
H, Derendorf, H, Möllmann, G, Hochhaus, B, Meibohm, and J, Barth
- Subjects
Dose-Response Relationship, Drug ,Hydrocortisone ,Adrenal Cortex Hormones ,Predictive Value of Tests ,Drug Design ,T-Lymphocytes ,Biological Availability ,Humans ,Lymphocyte Count ,Models, Biological ,Protein Binding - Abstract
Corticosteroids are used for the treatment of a variety of different diseases both locally and systemically. Most therapeutic effects result from glucocorticoid receptor-mediated events, and there seems to be no substance-specific difference in the post-receptor reaction cascade. Therefore, the extent and duration of glucocorticoid effects depend only on the availability of the respective steroid at the receptor site and its affinity to the receptor. This makes glucocorticoids an ideal candidate for PK/PD modelling. Availability at the receptor site is governed by pharmacokinetic parameters such as bioavailability, clearance, protein binding, and volume of distribution. The receptor affinity can easily be measured in vitro. A suitable indirect-response PK/PD model is presented that allows description of the receptor-mediated drug effects such as endogenous cortisol suppression as a function of time. Furthermore, this model allows prediction of the systemic activity of newly developed corticosteroids based on their pharmacokinetics and their respective receptor-binding affinity. The model can also be applied in order to study systemic steroid effects after topical administration or to investigate the effect of the time of dosing on cortisol suppression. Comparison of predictions based on this model and results from large clinical studies are in excellent agreement. Corticosteroids may represent an ideal class of drugs for the successful use of PK/PD modelling during drug development allowing to save time and expenses.
- Published
- 1997
20. Pharmacokinetics and pharmacodynamics of cloprednol
- Author
-
H, Möllmann, G, Hochhaus, S, Rohatagi, J, Barth, H, Derendorf, M, Krieg, H, Weisser, and A C, Möllmann
- Subjects
Adult ,Male ,Dose-Response Relationship, Drug ,Pregnenediones ,Administration, Oral ,Humans ,Lymphocytes ,Granulocytes - Abstract
The pharmacokinetics and pharmacodynamics of cloprednol after oral administration in doses of 2.5 to 15 mg to healthy volunteers were determined. The half-life of cloprednol ranged from 1.8 h to 2.7 h, the oral clearance (CL/F) was determined to be 15-22 l/h. Since cloprednol shows nonlinear plasma protein binding, the plasma concentrations were converted to their free, unbound concentrations for the PK/PD-analysis. Due to this nonlinearity, the half-life of free, unbound cloprednol was shorter than that of the total drug. For the assessment of pharmacodynamics, differential white blood cell counts were obtained over 24 hours. An integrated pharmacokinetic-pharmacodynamic (PK/PD) approach using a modified Emax-model was applied to link unbound corticosteroid concentrations to the effect on lymphocytes and granulocytes. The E50 value for unbound cloprednol ranged from 3.6 to 4.7 ng/ml and 1.2 to 4.6 ng/ml for granulocytes and lymphocytes, respectively. The PK/PD model allowed a good prediction of the observed effects and was consistent with reported values for glucocorticoid receptor binding affinities for cloprednol.
- Published
- 1996
21. Pharmacokinetic interaction between endogenous cortisol and exogenous corticosteroids
- Author
-
S, Rohatagi, G, Hochhaus, H, Möllmann, J, Barth, and H, Derendorf
- Subjects
Adult ,Hydrocortisone ,Prednisolone ,Humans ,Drug Interactions ,Blood Proteins ,Carrier Proteins ,Models, Biological ,Serum Albumin ,Software ,Protein Binding - Abstract
A problem in the evaluation of pharmacokinetic interactions between prednisolone and cortisol is that both steroids bind to cortisol binding globulin (CBG) and albumin. The binding of both steroids to CBG is saturable in the therapeutic concentration range. General drug binding equations were applied to two drugs and two binding sites and two implicit cubic equations were derived. These equations cannot be solved algebraically. However, the free concentration can be calculated using spreadsheet programs on a personal computer. A spreadsheet for these equations was developed using EXCEL 5.0 and its SOLVER option. Free concentrations of prednisolone and cortisol were determined as a function of total concentrations of both ligands. The simulations show that the protein binding of cortisol remains relatively constant in the physiological range but changes when exogenous corticosteroid is present. However, the degree of protein binding of exogenous corticosteroids that bind to CBG depends on the cortisol concentration which competes for binding sites. At the same time, the exogenous corticosteroid suppresses the release of endogenous cortisol. The presented approach is able to take all of these pharmacokinetic and pharmacodynamic interactions into account leading to a more accurate estimation of active free corticosteroid concentrations.
- Published
- 1995
22. Pharmacokinetic/pharmacodynamic evaluation of deflazacort in comparison to methylprednisolone and prednisolone
- Author
-
H, Möllmann, G, Hochhaus, S, Rohatagi, J, Barth, and H, Derendorf
- Subjects
Adult ,Male ,Cross-Over Studies ,Prednisolone ,Anti-Inflammatory Agents ,Administration, Oral ,Methylprednisolone ,Absorption ,Evaluation Studies as Topic ,Pregnenediones ,Humans ,Female ,Prodrugs ,Lymphocytes ,Glucocorticoids ,Granulocytes - Abstract
The pharmacokinetics and pharmacodynamics of deflazacort after oral administration (30 mg) to healthy volunteers were determined and compared with those of 20 mg of methylprednisolone and 25 mg of prednisolone.Methylprednisolone, prednisolone and the active metabolite of deflazacort, 21-desacetyldeflazacort, were measured in plasma using HPLC. For the assessment of pharmacodynamics, differential white blood cell counts were obtained over 24 hours. An integrated pharmacokinetic-pharmacodynamic (PK-PD) model was applied to link corticosteroid concentrations to the effect on lymphocytes and granulocytes.Deflazacort is an inactive prodrug which is converted rapidly to the active metabolite 21-desacetyldeflazacort. Maximum concentrations of 21-desacetyldeflazacort averaged 116 ng/ml and were observed after 1.3 h. The average area under the curve was 280 ng/ml.h, and the terminal half-life was 1.3 h. 21-Desacetyldeflazacort was cleared significantly faster than both methylprednisolone and prednisolone. The PK-PD-model was suitable to describe time course and magnitude of the observed effects. The results were consistent with reported values for glucocorticoid receptor binding affinities for the investigated compounds.Due to the short pharmacokinetic half-life of its active metabolite, pharmacodynamic effects of deflazacort are of shorter duration than those of methylprednisolone and prednisolone. The PK-PD model allows good prediction of pharmacodynamic effects based on pharmacokinetic and receptor binding data.
- Published
- 1995
23. 128 Human hibernating myocardium: contractile dysfunction is triggered by alterations in calcium-homeostasis and diminished intracellular phosphorylation ability
- Author
-
Albrecht Elsässer, Achim M. Vogt, H. Möllmann, Jutta Schaper, and H. Nef
- Subjects
Hibernating myocardium ,Calcium metabolism ,medicine.medical_specialty ,Endocrinology ,business.industry ,Internal medicine ,medicine ,Phosphorylation ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,Intracellular - Published
- 2003
- Full Text
- View/download PDF
24. Pharmacokinetic/pharmacodynamic characteristics of the beta-2-agonists terbutaline, salbutamol and fenoterol
- Author
-
G, Hochhaus and H, Möllmann
- Subjects
Adult ,Terbutaline ,Humans ,Albuterol ,Adrenergic beta-Agonists ,Child ,Fenoterol - Abstract
The clinical pharmacokinetics and pharmacokinetic/dynamic properties of the beta-adrenergic drugs fenoterol, salbutamol and terbutaline are reviewed. Sulfate conjugates are the main metabolites in man. The protein binding of these derivatives is rather weak with most pronounced binding observed e.g. fenoterol (40%). Disposition after parenteral administration shows a multi-exponential behavior for all the substances with linear but also stereo-selective pharmacokinetics. After parenteral administration, the drugs are mainly eliminated by renal processes while after oral administration a pronounced metabolic clearance (high first pass effect) is responsible for a low bioavailability, especially for fenoterol (2%). The total clearance for fenoterol is about twice that of salbutamol and terbutaline. Seven to 15% of the delivered aerosol reach typically the systemic circulation. In patients with respiratory disorders, pulmonary absorption is however highly dependent on the disease state. Pharmacokinetics in children do not significantly differ from adults when expressed per kg body weight. Patients with renal failure but not asthmatics show changed pharmacokinetic profiles. Only insignificant interactions with other drugs have been found. Pharmacokinetic/dynamic modeling approaches indicated that fenoterol is 25 times more active at the site of action than salbutamol and terbutaline, but all three drugs show similar bronchopulmonary selectivities. When the overall clinical activity, determined by pharmacokinetic and dynamic properties is compared, the activity gap is reduced: fenoterol (8) greater than salbutamol (2) greater than terbutaline (1). Differences in the first pass effect even inverse the pattern after oral administration. PK/PD modeling quantified the pulmonary effect after inhalation and suggested that the higher incidence of side effects for fenoterol might be linked to an overdosing problem. The application of PK/PD principles may improve the clinical usage and therapy of beta-2-adrenergic drugs.
- Published
- 1992
25. Pharmacokinetics and pharmacodynamics of prednisolone after intravenous and oral administration
- Author
-
J, Barth, M, Damoiseaux, H, Möllmann, K H, Brandis, G, Hochhaus, and H, Derendorf
- Subjects
Blood Glucose ,Male ,Leukocyte Count ,Dose-Response Relationship, Drug ,Prednisolone ,Injections, Intravenous ,Administration, Oral ,Humans ,Lymphocytes ,Drug Administration Schedule ,Granulocytes - Abstract
The pharmacokinetics and pharmacodynamics of prednisolone were investigated according to four different routes of administration: 20 and 40 mg prednisolone orally in the morning, 20 mg prednisolone orally in the evening and 40 mg prednisolone intravenously in form of prednisolone phosphate in the morning. The plasma levels of prednisolone were followed using HPLC. To study the pharmacodynamics of prednisolone, glucose levels and various blood cell parameters such as erythrocytes, leukocytes, segmented neutrophilic granulocytes, eosinophils, basophils, monocytes and lymphocytes were followed. To summarize the data, the area under the effect-time-curve (AUCE) was calculated by the trapezoidal rule. The results show that the pharmacokinetics of prednisolone is dose-dependent (non-linear) and time-dependent. Prednisolone concentrations in plasma after a 20 mg and 40 mg dose are very similar, indicating that the pharmacokinetics of prednisolone are non-linear and dose-dependent with a higher clearance for higher concentrations. The comparison of 20 mg administered in the morning with the same dose given in the evening shows that the pharmacokinetics of prednisolone after oral administration of equal doses changes during the day with higher concentrations in the morning than in the evening. Furthermore, the results of the present study confirm the presence of pharmacodynamic corticosteroid effects on blood cell count and blood glucose. No statistically significant differences were observed for the four different treatments. In summary, it can be concluded that due to the complex pharmacokinetics of prednisolone, it is difficult to make accurate predictions of the expected effect-time relationships.
- Published
- 1992
26. Pharmacokinetic/dynamic correlation of pulmonary and cardiac effects of fenoterol in asthmatic patients after different routes of administration
- Author
-
G, Hochhaus, E W, Schmidt, K L, Rominger, and H, Möllmann
- Subjects
Adult ,Aerosols ,Male ,Airway Resistance ,Middle Aged ,Asthma ,Heart Rate ,Injections, Intravenous ,Humans ,Female ,Infusions, Intravenous ,Administration, Intranasal ,Algorithms ,Aged ,Fenoterol - Abstract
Pulmonary and cardiac effects of the beta 2-adrenergic drug fenoterol were studied in 27 asthmatic patients using an integrated pharmacokinetic/dynamic (PK/PD) approach. Airway resistance (Rf), intrathoracic gas volume (IGV), heart rate, and plasma levels were monitored after placebo, injection (12.5 and 25 micrograms), nasal instillation (400 micrograms), inhalation (200 and 400 micrograms), and infusion (200 micrograms/180 min with or without loading dose). The pharmacokinetics were best described by an open three-compartment model with a terminal half-life of 200 min (gamma = 0.23 +/- 0.08 L/hr), a volume of distribution at steady state of 1.9 +/- 0.8 L/kg, and a clearance of 0.86 +/- 0.32 L/hr/kg, with 14 and 9% absorbed after nasal and pulmonary administration, respectively. For the noninhalation regimens, a PK/PD correlation linked the concentration in the shallow pharmacokinetic compartment to the investigated effects via an Emax relationship, resulting in three to five times higher EC50 values (concentration necessary to achieve half-maximal effect) for the heart rate than for the beta 2-mediated effects on IGV and Rf. In contrast, pulmonary effects after inhalation could not be incorporated into the correlation, indicating that these effects are induced locally after inhalation. Intrapatient variability for EC50 and Emax was approximately 90%.
- Published
- 1992
27. Pharmacodynamics of methylprednisolone phosphate after single intravenous administration to healthy volunteers
- Author
-
H, Derendorf, H, Möllmann, M, Krieg, S, Tunn, C, Möllmann, J, Barth, and H J, Röthig
- Subjects
Adult ,Blood Glucose ,Male ,Adolescent ,Dose-Response Relationship, Drug ,Humans ,Lymphocytes ,Methylprednisolone - Abstract
The pharmacokinetics and pharmacodynamics of methylprednisolone were investigated after intravenous administration of methylprednisolone phosphate to healthy subjects at seven different doses (16 to 1000 mg). Forty different pharmacodynamic parameters were followed for 1 week. The pharmacodynamic data were analyzed as a function of time as well as cumulative effects in form of the areas under the effect-time curves. Statistically significant dose-dependent effects of methylprednisolone were observed for 15 pharmacodynamic parameters. Highly significant (P less than or equal to 0.0001) effects were increases in glucose levels, number of white blood cells, and segmented granulocytes as well as a decrease in the number of lymphocytes. For these pharmacodynamic effects an integrated pharmacokinetic/pharmacodynamic model was derived that translates the methylprednisolone plasma concentration-time profiles into effect-time profiles. This model allows prediction of pharmacodynamic effects for any single dose in the range studied at any time point.
- Published
- 1991
28. Oral bioavailability of triamcinolone tablets and a triamcinolone diacetate suspension
- Author
-
G, Hochhaus, M, Pörtner, J, Barth, H, Möllmann, and P, Rohdewald
- Subjects
Adult ,Protein-Lysine 6-Oxidase ,Suspensions ,Chemistry, Pharmaceutical ,Radioimmunoassay ,Administration, Oral ,Biological Availability ,Humans ,Middle Aged ,Triamcinolone ,Tablets - Published
- 1990
29. Allergiediagnostik
- Author
-
H. Möllmann
- Published
- 1990
- Full Text
- View/download PDF
30. 133 Different inotropic properties and intracellular signalling pathways of endothelin-1 in isolated myocytes from non-failing and failing human myocardium
- Author
-
Albrecht Elsässer, S. Kamenzin, Christian Holubarsch, P. Kahlert, H. Möllmann, S. Schmidt‐Schweda, and H. Nef
- Subjects
Inotrope ,business.industry ,Medicine ,Isolated myocytes ,Cardiology and Cardiovascular Medicine ,Intracellular signalling ,business ,Human myocardium ,Endothelin 1 ,Cell biology - Published
- 2003
- Full Text
- View/download PDF
31. Ganztierautoradiographische Untersuchungen am 7-(Butin-(3′)-yl)-theophyllin-3H
- Author
-
Ulrich Seeger, H Möllmann, and Johannes Reisch
- Subjects
Kidney ,Cerebrospinal fluid ,medicine.anatomical_structure ,Chemistry ,Stereochemistry ,Drug Discovery ,medicine ,Pharmaceutical Science ,Theophylline ,Tissue distribution ,Molecular biology ,medicine.drug - Abstract
Die Synthese des 7-(Butin-(3′)-yl)-theophyllins-3H wird beschrieben. Ganztierautoradiographische Untersuchungen an Wistar-Ratten ergaben eine Anreicherung der Substanz im liquor cerebrospinalis, sowie im Glaskorper des Auges und den Zwischenwirbelscheiben. Bei einer histologischen Analyse der Niere zeigte sich in den tubuli contorti I und II Abschnitten eine vakuolige Auflockerung mit teilweiser Zerstorung der gesamten Zelle. Studies of [3H]-7-(3-Butynyl)theophylline by Whole-Body Autoradiography The synthesis of [3H]-7-(3-butynyl)-theophylline is described. Whole-body autoradiography of Wistar rats after application of the compound shows a cumulation of radioactivity in the cerebrospinal fluid, in the vitreous body of the eye and in the intervertebral discs. Histologic analysis of the kidney showed a vacuolic structure and partial destruction of the cells in convoluted tubules I and II.
- Published
- 1977
- Full Text
- View/download PDF
32. Conversion coefficients and E0 transitions in102, 104, 106Pd
- Author
-
H. Möllmann, H. Hardenberg, K. Farzin, K. Uebelgünn, and H. v. Buttlar
- Subjects
Physics ,Nuclear and High Energy Physics ,Range (particle radiation) ,Electron energy ,Conversion coefficients ,Nuclear fusion ,Electron ,Atomic physics - Abstract
In in-beam (p, p′) experiments, electron and γ-spectra were measured in the electron energy range of 500-1840 keV for102Pd and104Pd, and 600–1580 keV for106Pd. The conversion coefficients of all transitions in this range were obtained with accuracies of about 20%, in some favourable cases 10%.
- Published
- 1987
- Full Text
- View/download PDF
33. FLUORESZENZMIKROSKOPISCHE UNTERSUCHUNGEN ÜBER DIE LOKALISIERUNG VON ACRIDON-ALKALOIDEN IN GEWEBEN VONRUTA GRAVEOLENS
- Author
-
Gisella Verzár–Petri, K. Csedö, H. Möllmann, K. Szendrei, and J. Reisch
- Subjects
Pharmacology ,Complementary and alternative medicine ,Organic Chemistry ,Drug Discovery ,Pharmaceutical Science ,Molecular Medicine ,Analytical Chemistry - Published
- 1976
- Full Text
- View/download PDF
34. Identifizierung von Phenyläthylamin-Abkömmlingen durch Kernresonanzspektroskopie
- Author
-
Johannes Reisch, H. Möllmann, and H. Alfes
- Subjects
Chromatography ,Chemistry ,Clinical Biochemistry ,General Materials Science ,General Medicine ,Analytical Chemistry - Abstract
Um die Identifizierung von Phenylathylamin-Abkommlingen durch die Kernresonanzspektroskopie zu ermoglichen, wurde von 20 derartigen Substanzen das Spektrum aufgenommen und die fur sie charakteristischen Signale angegeben.
- Published
- 1968
- Full Text
- View/download PDF
35. Mikrospektrofluorometrische Untersuchungen der biogenen Amine im Glomus caroticum des Kaninchens nach Reserpin- und PCPA-Applikation
- Author
-
D. H. Niemeyer, Hermann Knoche, H. Möllmann, and H. Alfes
- Subjects
Histology ,Biochemistry ,Chemistry ,medicine ,Glomus caroticum ,Cell Biology ,Reserpine ,Molecular biology ,Pathology and Forensic Medicine ,medicine.drug - Abstract
Die Glomera carotica von 12 Kaninchen wurden nach viertagiger Applikation von Reserpin (2 mg/kg KG; i.p.) (I), Parachlorphenylalanin-methylester-hydrochlorid (PCPA; 100 mg/kg KG; i.p.) (II) und physiologischer NaCl-Losung (III) mit der Falckschen Fluoreszenzmethode aufgearbeitet und cytospektrofluorometrisch (Mikrospektrograph Leitz) ausgewertet. An Hand der Fluoreszenzspektren der spezifischen Glomuszellen (Typ I) lies sich eine Depletion der Catecholamine und des Serotonins verfolgen: hiernach senkt PCPA vor allem das Serotonin, Reserpin hingegen die Catechol- und Indolamine in etwa gleichem Umfang. Durch Zerlegung einiger Gesamtspektren in die Anteile fur Catecholamine und das Serotonin mit Hilfe eines Iterationsverfahrens der nichtlinearen Regression konnte gezeigt werden, das nur eine geringfugige Beeinflussung der Catecholamin-Peakhohe durch das Serotonin vorliegt. Uber die Messung der Peakhohe im Catecholaminbereich der Gesamtspektren konnte daher die Reduktion der Catecholamine auf 64±22% durch PCPA und auf 13±4% durch Reserpin statistisch gesichert werden. Die Befunde werden im Zusammenhang mit den moglichen Wirkungsmechanismen der applizierten Substanzen diskutiert. Eine ausfuhrliche tabellarische Zusammenstellung der bisherigen Angaben uber Gehalt und Zusammensetzung der biogenen Amine des Glomus caroticum erganzt diese Diskussion.
- Published
- 1972
- Full Text
- View/download PDF
36. Topochemischer Nachweis von carbonylhaltigen Verbindungen im Thymus
- Author
-
J Kindler, Henning W, Johannes Reisch, H Möllmann, and H. Alfes
- Subjects
Histology ,Histocytochemistry ,Chemistry ,Cell Biology ,Molecular biology ,Pathology and Forensic Medicine - Abstract
Topochemisch konnten im Kaninchenthymus Ketosteroide nachgewiesen werden, fur deren Vorhandensein die chemische Analyse von Thymuslipidextrakten Hinweise ergeben hatte. Die Darstellung der Ketosteroide erfolgte mit der NAHD-Reaktion (Camber, 1949). Diese Befunde durften als spezifisch gelten, da eine Verfalschung durch freie Gewebsaldehyde, Plasmalogene (Gomori, 1952) und Corticosteroide (Khanolkar et al., 1958) ausgeschlossen wurde.
- Published
- 1973
- Full Text
- View/download PDF
37. �ber die enterale Resorption von metallischem Quecksilber
- Author
-
G. Bornmann, G. Henke, H. Möllmann, and H. Alfes
- Subjects
Gynecology ,medicine.medical_specialty ,Chemistry ,Health, Toxicology and Mutagenesis ,Pharmacology toxicology ,medicine ,General Medicine ,Toxicology - Abstract
Durch Neutronenaktivierungsanalyse wird nachgewiesen, das bei der Eatte von symptomlos vertragenem metallischem Quecksilber, oral zugefuhrt, ein geringer Anteil resorbiert wird, welcher zu einer Erhohung der Queeksilberwerte in Blut und Niere auf reichlich das 10fache der Norm fuhrt.
- Published
- 1970
- Full Text
- View/download PDF
38. Untersuchungen über die Phospholipoide des Kalbsthymus
- Author
-
Johannes Reisch, C. Münnighoff, and H Möllmann
- Subjects
Chromatography ,Chemistry ,Magnesium silicate ,Phosphatidyl serine ,Drug Discovery ,Phosphatidyl inositol ,Pharmaceutical Science ,Phosphatidyl ethanolamine ,Phosphatidyl choline ,Sphingomyelin - Abstract
Der Lipidgehalt des schlachtfrischen Kalbsthymus betragt 4,1 %. Davon sind 1 – 3 % Kohlenwasserstoffe, 66– 69 % Neutrallipide und 22,5 – 24 % Phospholipoide. In der letzgenannten Fraktion konnten nachgewiesen werden: Phosphatidylcholin, Phosphatidylathanolamin, Sphingomyclin, Phosphatidylinositid. Die Hauptkomponenten sind: Phosphatidylcholin (0,56%), Phosphatidylathanolamin (0,27 %) und Sphingomyelin (0,12 %). Ihre Analyse erfolgte nach DC an Kieselgel/Magnesiumsilikat durch eine kolorimetrische Phosphorbestimmung. Investigations of the Phospholipids of Calf Thymus The thymus of freshly slaughtered calves was found to contain 4,1 % of lipids, of which 1 – 3 % consisted of hydrocarbons, 66 – 69 % of neutral lipids and 22,5 – 24 % of phospholipids. In the latter fraction were identified: phosphatidyl choline, phosphatidyl ethanolamine, sphingomyelin, phosphatidyl serine and phosphatidyl inositol. The main components are: phosphatidyl choline (0,56 %), phosphatidyl ethanolamine (0,27 %) and sphingomyelin (0,12 %). Their analysis was done by Kieselgel/magnesium silicate thinlayer chromatography using the colorimetric determination of phosphorus.
- Published
- 1973
- Full Text
- View/download PDF
39. Einflu� von synthetischen Glucocorticoiden und von Metopiron auf ketosteroidhaltige Zellen des postnatalen Kaninchenthymus
- Author
-
Henning W, H. Alfes, H Möllmann, Johannes Reisch, and J Kindler
- Subjects
chemistry.chemical_compound ,Histology ,Chemistry ,Ketosteroid ,Cell Biology ,Synthetic glucocorticoids ,Molecular biology ,Pathology and Forensic Medicine - Abstract
Nachdem durch die NAHD-Reaktion (Camber, 1949) Ketosteroide in den granulierten Zellen des Kaninchenthymus dargestellt werden konnten (Mollmann et al., 1973), wurde der Ketosteroidgehalt des Thymus an Hand des zahlenmasigen Verhaltens der Camber-positiven Zellen in der Postnatalzeit (1.–30. Tag), nach Glucocorticoidapplikation sowie nach Metopirongabe uberpruft. Die bei der Geburt nur vereinzelt auftretenden granulierten Zellen vermehrten sich stetig bis zu einem Maximum am 9. postnatalen Tag, um daraufhin wieder abzunehmen. Ein Vergleich dieser Befunde mit dem relativen Thymusgwicht ergab eine nahezu gegensinnige Korrelation. Nach Verabreichung von Glucocorticoiden von Geburt an zeigten die Thymi von Kaninchen, die nicht am Wasting-Syndrom verstarben, eine deutliche Zunahme der Camber-positiven Zellen, wiederum gegenlaufig zum relativen Thymusgewicht. Hingegen fuhrte die mehrtagige Applikation von Metopiron zu keinen Veranderungen der Zahl und des Aussehens dieser Zellen.
- Published
- 1973
- Full Text
- View/download PDF
40. Das unterschiedliche Bild organspezifischer Strukturen im Glomus caroticum und Nebennierenmark
- Author
-
D. Matthiessen, H Möllmann, and Hermann Knoche
- Subjects
Histology ,Chemistry ,Cell Biology ,Molecular biology ,Pathology and Forensic Medicine - Abstract
Die organspezifischen Strukturen im Glomus caroticum und Nebennierenmark zeigen unter verschiedenen experimentellen Bedingungen ein unterschiedliches Bild. So last sich unter anderem durch Modifizierung der Fixationsmedien (Glutaraldehyd, Osmiumsaure in Kombination mit verschiedenen Puffern) eine optimale Differenzierung der zellularen Strukturelemente von Glomuszellen erreichen. An den osmiophilen Vesikeln fallt eine starke Variabilitat ihres Erscheinungsbildes auf. Feinstrukturelle Unterschiede werden in Elektronendichte des Vesikelinhaltes, Grose und Ausbildung des Hofes sowie in Aufbau und Verlauf der Membran deutlich. Auf Grund dieser Kriterien lassen sich im wesentlichen 4 Haupttypen der Granula von seltener vorkommenden Sonderformen abgrenzen.
- Published
- 1973
- Full Text
- View/download PDF
41. Experimenteller Beitrag zur Kenntnis der biogenen Amine im Glomus caroticum des Kaninchens
- Author
-
H. Alfes, Hermann Knoche, H. Möllmann, E. W. Kienecker, D. H. Niemeyer, and Stephan Decker
- Subjects
Histology ,Biochemistry ,Chemistry ,medicine ,Glomus caroticum ,Cell Biology ,Reserpine ,Molecular biology ,Electron microscopic ,Fluorescence ,After treatment ,Pathology and Forensic Medicine ,medicine.drug - Abstract
Der Einflus von p-Chlorphenylalanin-methylester-hydrochlorid (PCPA) und Reserpin auf die biogenen Amine des Glomus caroticum von Kaninchen wurde ultrastrukturell und fluoreszenzmikroskopisch untersucht. Die elektronenmikroskopische Analyse ergab keine eindeutigen Kriterien fur arzneimittelinduzierte Veranderungen. Fluoreszenzmikroskopisch lies sich nach Applikation von Reserpin eine ausgepragte Senkung des Catecholamin- und Indolamin-Gehaltes und nach PCPA eine Abnahme des Serotonins erkennen.
- Published
- 1972
- Full Text
- View/download PDF
42. EFFECT OF PROGESTERONE ON RNA AND PROTEIN SYNTHESIS IN THE RAT UTERUS
- Author
-
H. Maass, H. Möllmann, H. Brewitt, and G. Trams
- Subjects
medicine.medical_specialty ,Time Factors ,Endocrinology, Diabetes and Metabolism ,Tritium ,Endocrinology ,Internal medicine ,Progesterone receptor ,Hydroxyprogesterones ,medicine ,Protein biosynthesis ,Animals ,Carbon Radioisotopes ,Castration ,Uridine ,Progesterone ,Dose-Response Relationship, Drug ,Estradiol ,Chemistry ,Uterus ,RNA ,Valine ,General Medicine ,Stimulation, Chemical ,Rats ,Depression, Chemical ,Protein Biosynthesis ,Rat uterus ,Pregnanediol ,Female - Abstract
The effect of gestagenic compounds on the oestrogen induced nucleic acid and protein synthesis of the rat uterus after castration was investigated. Progesterone causes an inhibition of 3H-uridine incorporation into uterine RNA. The inhibitory effect is strongest when progesterone is administered within 1 hour before isotope labelling. Evaluation of the free labelled nucleotides shows that this effect is not achieved by a blockade of permeability at the cell membrane or by reduction of the phosphorylation process. As a result of this progesterone-induced inhibition, protein synthesis is also reduced. These results are discussed with regard to the modifying effect of progesterone on oestrogen dependent functions in the uterus.
- Published
- 1973
- Full Text
- View/download PDF
43. Der Einflu� k�rperlicher Belastung vor und nach Schwimmtraining auf das Leberparenchym und den Serumenzymspiegel bei Ratten
- Author
-
D. Braun, H. Alfes, Clasing D, and H. Möllmann
- Subjects
Gynecology ,medicine.medical_specialty ,Physiology ,business.industry ,Physiology (medical) ,Clinical Biochemistry ,Medicine ,Human physiology ,business - Abstract
Licht- und elektronenmikroskopische Langsschnittuntersuchungen des Leberparenchyms untrainierter und trainierter Ratten vor und nach korperlicher Belastung ergaben bei paralleler Bestimmung von verschiedenen Fermentaktivitaten im Serum einen signifikanten Zusammenhang zwischen Training und Leistungssteigerung. Durch die schonende transcutane Leberblindpunktion waren mehrere Versuchsfolgen an ein und demselben Tier moglich. Bei untrainierten Ratten wurden nach Belastung durch den Schwimmtest destruktive Veranderungen des Leberzellgefuges, Umbauvorgange im Bereich der meta- und paraplasmatischen Substrukturen sowie statistisch gesicherte Abweichungen der Serumenzymspiegel gegenuber 10 Tage vorher ermittelten morphologischen und enzymologischen Normalbefunden beobachtet. Nach einer Trainingsphase von ca. 4 Wochen kam es zu einer Adaptation des Leberstoffwechsels auf den unphysiologischen Belastungsreiz, die sich in einer deutlichen Vermehrung von Zellorganellen (Mitochondrien, Ribosomen) und einer leichten Steigerung der Fermentaktivitaten von Glutamat-Oxalacetat-Transaminase (GOT), Glutamat-Pyruvat-Transaminase (GPT), Lactat-Dehydrogenase (LDH) und Abnahme der Aldolase (ALD) erkennbar machte und dazu fuhrte, das bei einer weiteren Schwimmbelastung neben einer erheblichen Leistungssteigerung die ohne vorheriges Training beobachteten schweren fermentativen und Leberzellveranderungen nicht mehr auftraten. Ursachen der beschriebenen Reaktionen in den Leberzellen und im enzymatischen Status sowie der Einflus des Trainings auf den Leberstoffwechsel nach korperlicher Belastung werden diskutiert.
- Published
- 1971
- Full Text
- View/download PDF
44. Beitrag zur Chemie der Plasmalogene des Kalbsthymus
- Author
-
Johannes Reisch, C. Münnighoff, and H Möllmann
- Subjects
chemistry.chemical_classification ,Plasmalogen ,Linolenic acid ,Stereochemistry ,Pharmaceutical Science ,Aldehyde ,Palmitic acid ,Dimethyl acetal ,chemistry.chemical_compound ,Ethanolamine ,chemistry ,Drug Discovery ,Choline ,Gas chromatography - Abstract
Der Lipidextrakt des Kalbsthymus enthalt 6,5 Proz. Plasmalogene. Hiervon entfallen auf die Athanolaminplasmalogene 3,07 Proz. und auf die Cholinplasmalogene 1,36 Proz. Die Plasmalogenaldehyde wurden durch GC der Dimethylacetale bestimmt. Authentische Aldehyde wurden durch Braunstein-Oxidation der zugehorigen Alkohole gewonnen. In den Cholin- bzw. Athanolaminplasmalogenfraktionen wurden C14, C15, C16, C17, C18, C18:1 C20, C22 und C24-Aldehyde gefunden. Den Hauptanteil der Gemische bilden Palmitin-aldehyd (47,3 bzw. 44,0 Proz.), Stearinaldehyd (17,5 bzw. 20,4 Proz.) und Oleylaldehyd (14,8 bzw. 21,8 Proz.). Gc konnten in den Cholin- und Athanolaminphospholipoiden C14, C15, C16, C16:1 C17, C18, C18:1 C18:2 C20, C20:1 C20:2 C20:3 und C22 Fettsauren nachgewiesen werden. Die Ester von Ol- und Palmitinsaure sind am haufigsten in den Phosphatiden vorhanden. Linolensaure ist ausschlieslich in den Cholinphosphatiden, Docosensaure (C22:1) nur in den Athanolaminphosphatiden enthalten. Aufgrund der Untersuchungsergebnisse lassen sich Strukturen fur die wesentlichsten Thymusplasmalogene wahrscheinlich machen. A Contribution to the Chemistry of Calf Thymus Plasmalogens The lipid extract of calf thymus contains 6,5 % plasmalogens, of which the ethanolamine plasmalogens constitute 3.07 % and the choline plasmalogens 1.36 %. The plasmalogen aldehydes were determined by gas chromatography of their dimethyl acetal derivatives. The authentic aldehydes were obtained by manganese dioxide oxidation of the respective alcohols. In both the choline and ethanolamine plasmalogen fractions C14, C15, C16, C17, C18, C18:1, C20, C22 and C24 aldehydes were found. The main components of this mixture are palmitic aldehyde (47.3 - 44.0 %), stearic aldehyde (17.5 - 20.4 %) and oleic aldehyde (14.8 - 21.8 %). C14, C15, C16, C16:1 C17, C18, C18:1, C18:2, C20, C20:1 C20:2, C20:3 and C22 fatty acids could be identified by gas chromatography of the choline and ethanolamine phospholipoids. The esters of oleic and palmitic acids are the most abundant. Linolenic acid is confined to the choline phosphatides, while docosenic acid (C22:1) is found only in the ethanolamine phosphatides. On the basis of these results the structure of the essential thymus plasmalogens may be elucidated.
- Published
- 1973
- Full Text
- View/download PDF
45. Klinischer und morphologischer Beitrag zur Kenntnis der Tumoren von Chemoreceptorenfeldern
- Author
-
H. Möllmann, W. Sasse, H. Knoche, and P. Sunder-Plassmann
- Subjects
Text mining ,Chemoreceptor ,business.industry ,Medicine ,Surgery ,business ,Neuroscience - Published
- 1970
- Full Text
- View/download PDF
46. Vergleichende Untersuchungen �ber die Konzentration einiger Spurenelemente in menschlichen Hirnarealen durch Neutronenaktivierungsanalyse
- Author
-
G. Henke, H. Möllmann, and H. Alfes
- Subjects
Neurology ,Chemistry ,Neurology (clinical) ,Molecular biology - Abstract
Durch die Neutronenaktivierungsanalyse konnten die Konzentrationen der Elemente Cu, Se, Ag, Zn, Fe, Rb, Au, La und Ba in 14 Arealen des menschlichen Gehirns bestimmt werden. Die Zentren der extrapyramidalen Motorik wiesen eine hohere Konzentration dieser Elemente als die Areale mit uberwiegend weiser Substanz auf. Die Ergebnisse werden den bisher veroffentlichten Untersuchungen gegenubergestellt und diskutiert.
- Published
- 1971
- Full Text
- View/download PDF
47. Einflu� von Phentermin-Resinat auf die Gef��wand der Lungenarterien (Tierexperimentelle Untersuchungen)
- Author
-
W Sowislo, H. Möllmann, and J Kindler
- Subjects
Gynecology ,medicine.medical_specialty ,Phentermine ,business.industry ,Drug Discovery ,Molecular Medicine ,Medicine ,General Medicine ,business ,Body weight ,Genetics (clinical) ,medicine.drug - Abstract
In zwei Versuchsserien wurde 60 Ratten (Wistar- bzw. SPF-Sprague-Dawley Stamm) beiderlei Geschlechts mit einem Ausgangsgewicht von 330 bzw. 180 g peroral uber 30 Tage 12 bzw. 18 mg/kg Korpergewicht Phentermin-Resinat appliziert. Zur Kontrolle erhielten 40 Tiere p.o. physiologische Kochsalzlosung, wahrend 40 Ratten unbehandelt blieben. Dabei konnten bei etwa 70% der alteren Phentermin-Resinat-behandelten Tiere Umbauprozesse der Pulmonalarterienaste beobachtet werden, die von einer mittelgradigen bis ausgepragten Hypertrophie der Tunica media bis nahezu vollstandiger Einengung des Lumens reichten.
- Published
- 1974
- Full Text
- View/download PDF
48. Die Anwendung der Neutronenaktivierungsanalyse zur Diagnostik und Verlaufsbeobachtung bei Morbus Wilson
- Author
-
H. Möllmann, G. Henke, and W. Althoff
- Subjects
Gynecology ,medicine.medical_specialty ,business.industry ,Drug Discovery ,Molecular Medicine ,Medicine ,General Medicine ,business ,Genetics (clinical) - Abstract
Mit Hilfe der Neutronenaktivierungs-analyse wurde der Kupfergehalt im Leberpunktionsmaterial eines Patienten mit Morbus Wilson vor Behandlungsbeginn und nach mehrjahriger Penicillamin D-Medikation bestimmt. Die Ergebnisse werden mit den klinischen Befunden verglichen und zeigen, das die Kupferbestimmung in der Leber genauere Aussagen zur Diagnose des Morbus Wilson und uber den Therapieerfolg ermoglicht.
- Published
- 1971
- Full Text
- View/download PDF
49. Podiumsgespräch Therapie des Asthma bronchiale
- Author
-
G. Fruhmann, H. Fabel, O. P. Schmidt, W. Hartung, R. Ferlinz, W. T. Ulmer, R. Wettengel, and H. Möllmann
- Abstract
Die Definition des Asthma bronchiale beinhaltet „anfallsartige Atemnot, die durch erhohte Stromungswiderstande in den Atemwegen verursacht wird“. Hierbei ist der Begriff „anfallsartig” nicht klar definiert. Auch sogenanntes Dauerasthma zeigt keine konstanten Stromungswiderstande. Alle Erkrankungen mit erhohten Stromungswiderstanden in den Atemwegen lassen sich zweckmasig unter dem Sammelbegriff „obstruktive Atemwegserkrankungen“ zusammenfassen. Dies ist um so mehr berechtigt, da auch die Therapie der Atemwegsobstruktion, gleich, ob sie mehr oder weniger anfallsartig, zwar mit bestimmten Schwerpunkten verschieden, im Prinzip aber doch gleichartig, verlauft.
- Published
- 1982
- Full Text
- View/download PDF
50. [Effect of fenoterol on hypoxemia associated with the allergen inhalation provocation test in patients with bronchial asthma]
- Author
-
D, Brzostek, J, Kowalski, H, Möllmann, W, Ulmer, and W, Droszcz
- Subjects
Adult ,Male ,Administration, Inhalation ,Humans ,Female ,Allergens ,Hypoxia ,Asthma ,Bronchial Provocation Tests ,Fenoterol - Published
- 1988
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.