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  • 1
    ISSN: 1420-9071
    Keywords: Aphidiidae ; ant-parasitoid interactions ; specialization ; chemical mimicry ; trophallaxis ; parasitoid longevity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Females of the aphid parasitoidParalipsis enervis received liquid food by regurgitation (trophallaxis) from workers of the ant speciesLasius niger, but were not fed by workers ofMyrmica laevinodis andTetramorium caespitum. WhileP. enervis was not treated aggressively by workers of any of these species,Lasius flavus workers killed the parasitoid. This different ant behaviour resulted in a different parasitoid longevity. WhileP. enervis survived for only 10 min in the presence ofL. flavus (due to ant aggression) or for approximately one day in the presence ofT. caespitum andM. laevinodis (due to lack of trophallaxis), survival increased significantly to more than five days in the presence ofL. niger, which provided food regularly to the parasitoids. Our study suggests thatP. enervis mimics behavioural signals ofL. niger, as well as odor cues of its host aphidAnoecia corni, to avoid aggression byL. niger.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 38 (1977), S. 27-32 
    ISSN: 1432-0533
    Keywords: Ringed fibres ; Skeletal muscle ; Muscle pathology ; Geratric pathology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 26 muscles with one or more ringed fibres, corresponding to 2,83%, have been found in 939 muscles out of 313 unselected obductions. Taking into consideration that in the M. rectus femoris alone. 21 ringed fibres were found, raises the quota to 6.7% After desintegration into primary diseases, the cardiovascular illnesses have been accompanied with ringed fibres in 20.6%, in comparison to the other disease groups which have been rarely or not at all affected. Apart from one case probably traumatic ringed fibres formation, individuals above 49 years old are exclusively striken, at which by far the male sex prevails. The number of ringed fibres continually increases with the age, and all cases with 20 or more ringed fibres have exceeded the 60th year. Besides there is also a relation between the ringed fibres frequency and the atrophy degree of the muscle. The fact that this relation is not reversible the presence of an additional dispositional factor must be concluded. The distribution pattern of the ringed fibres is nonuniform, they occur partly disseminated or also partly flock formed, heaped up ringed fibres. They are mostly simple closed circular fibres. Compound forms are sporadically observed. A coincidence of sarcoplasmic masses was in all cases not traceable. The information at hand will be discussed. The frequent appearance in cardiovascular illnesses leads back to stress factors like hypoxidosis, acidosis etc. by reduced cardiac output, the frequency in age to multifactor reasons. The preponderance of catabolic metabolism, electrolyte shifting and disturbances of transmineralisation is particularly made responsible. Etiological traumas play an additional role particularly in younger individuals. The frequent occurrence in the male sex is referred to the different gender-dependent gauge conditions of the two fibre types.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 34 (1976), S. 359-363 
    ISSN: 1432-0533
    Keywords: Amyloid nephropathy ; Interference contrast microscopy ; Neuropathic amyloidosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Report of a 35 year old male with hereditary neuropathic amyloidosis of the portuguese type, the second known case in Germany. There are extensive nodular Congo red positive amyloid deposits in the endoneurium of the peripheral nerves which lead to displacement, compression atrophy and interruption of the endoneural fascicles. The amyloid fibril structure is specially noted by interference contrast microscopy. It can also be documented in unstained microscopic sections. Further extensive nodular deposits are present in the mesangium of the glomerula. The remaining organs show preponderantly affected vessel walls and collagen fibers.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 55 (1977), S. 1125-1126 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 57 (1979), S. 927-936 
    ISSN: 1432-1440
    Keywords: Muscle carnitine deficiency ; “Systemic carnitine deficiency” ; Carnitine palmityltransferase ; Vacuolar myopathy ; Lipid storage myopathy ; Mitochondrial anomalies ; Hereditary metabolic myopathies ; Muskelcarnitinmangel ; „systemischer Carnitinmangel“ ; Carnitin-Palmityltransferase ; vacuoläre Myopathie ; Lipidspeichermyopathie ; Mitochondrienanomalien ; hereditäre metabolische Myopathien
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird über zwei Geschwister berichtet, welche im Alter von 8 bzw. 10 Wochen unter den Zeichen einer Ateminsuffizienz bei zunehmender generalisierter muskulärer Schwäche ad exitum kamen. Auf eine zusätzliche Beteiligung des zentralen Nervensystems wies als einziger Befund ein deutlich erhöhtes Liquoreiweiß hin. Die Muskelbiopsie zeigte eine vacuoläre Myopathie. Histochemisch war eine vermehrte Speicherung von Fett, eine gesteigerte Aktivität an mitochondrialen Enzymen sowie geringer eine Glycogenvermehrung in zahlreichen Muskelfasern vor allem vom Typ I nachweisbar. Elektronenmikroskopisch ließ sich eine zum Teil großtropfige Verfettung im Verein mit vermehrten, vergrößerten und abnorm strukturierten Mitochondrien bestätigen. Biochemisch zeigte sich im Muskel, verglichen mit einem Normalkollektiv, ein eindeutiger Carnitinmangel, sowie eine Erhöhung der Carnitin-Palmityltransferaseaktivität. Retrospektiv ist vom klinischen Verlauf her zu vermuten, daß das Krankheitsbild dem sog. „systemischen Carnitinmangel“ zuzuordnen ist, auch wenn einige sonstige klinische Zusatzsymptome (Hepatomegalie, Kardiomyopathie) fehlten und eine Bestimmung von Serum- und Lebercarnitin nicht erfolgte, da die Kinder starben, bevor die Diagnose des Muskelcarnitinmangels bestätigt war. Das klinische Bild dieser beiden letalen Verläufe wird verglichen mit der Kasuistik eines isolierten Muskelcarnitinmangels. Dieses Kind zeigt einen wesentlich benigneren Verlauf einer Muskelerkrankung. Die morphologischen Befunde des Muskels erwiesen sich jedoch als weitgehend identisch. Biochemisch war die Carnitinverminderung des Muskels sogar ausgeprägter, während die Serumcarnitinwerte im Normbereich lagen. Eine Aktivitätssteigerung der Carnitin-Palmityltransferase war hier nicht nachzuweisen.
    Notes: Summary This report deals with two sisters who died with eight, respectively ten weeks under the signs of respiratory failure caused by progressive muscular weakness. Only an elevated cerebrospinal fluid protein was suspicious of an additional disturbance of the central nervous system. Muscle biopsy revealed a vacuolar myopathy. Histochemistry showed lipid storage, increased mitochondrial enzyme activity, and to a lower degree, glycogen accumulation especially in type I muscle fibers. Electron microscopy confirmed elevated lipid content in combination with increased, enlarged and abnormally structured mitochondria. Biochemical studies on muscle biopsy, in comparison with normal children, showed a significant decrease of carnitine content and an increased activity of carnitine palmityltransferase. Retrospectively from a clinical point of view this disease is suggestive of “systemic carnitine deficiency”, even if some symptoms (hepatomegaly, cardiomyopathy) were not present and serum- and liver carnitine was not measured because the children died before the diagnosis of muscle carnitine deficiency was confirmed. The clinical picture of theese two fatal cases is compared with another observation of muscle caritine deficiency. This child shows only a mild course of muscle disorder, but very similar morphological changes in muscle biopsy. Biochemically, there was a clear decrease in muscular carnitine, while the serum levels were in the normal range. The activity of muscular carnitine palmityltransferase was also normal.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 59 (1981), S. 1053-1059 
    ISSN: 1432-1440
    Keywords: Glycogenosis ; Glycogenosis type V (McArdle) ; Vacuolar myopathy ; Recurrent rhabdomyolysis ; Glycogen storage ; Muscle phosphorylase deficiency ; Glykogenose ; Glykogenose Typ V (McArdle) ; Vacuoläre Myopathie ; Rezidivierende Rhabdomyolyse ; Glykogenspeicherung ; Muskelphosphorylasemangel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird über die myopathologischen und biochemischen Befunde von sechs Patienten mit Glykogenose Typ V (McArdle) berichtet. Morphologisch findet sich in vier Fällen das typische Substrat einer vacuolären Myopathie mit vorwiegend subsarkolemmaler Glykogenvermehrung. Eine Biopsie zeigt nur sehr diskrete Strukturveränderungen, welche ohne entsprechende biochemische Befunde keine sichere diagnostische Festlegung zuließen. In einer weiteren Biopsie stehen die Zeichen der abgelaufenen Rhabdomyolyse quantitativ ganz im Vordergrund und überlagern die Speichermyopathie. Biochemisch ist in allen Fällen ein erhöhter Glykogengehalt nachweisbar, welcher mehrheitlich zwischen 2,5–4,23% liegt, bzw. nur bei dem klinisch ausgeprägtesten Fall mit abgelaufener Rhabdomyolyse über 5% beträgt. In allen Fällen kann zusätzlich ein Fehlen bzw. eine hochgradige Verminderung der Phosphorylaseaktivität objektiviert werden. Abgesehen von dem besonders schwer verlaufenden Fall ist keine sichere Korrelation zwischen der Quantität der myopathologischen und biochemischen Befunde zu erkennen, was bedeutet, daß bei entsprechendem klinischen Beschwerdebild eine ergänzende biochemische Untersuchung des Muskels durchgeführt werden sollte, selbst wenn morphologisch nur diskrete Veränderungen zu erkennen sind.
    Notes: Summary This report deals with structural and biochemical studies of muscle biopsies from six patients with glycogenosis type V (McArdle). From a morphological point of view in four cases the typical findings of vacuolar myopathy with glycogen storage especially under the sarcolemma can be demonstrated. One biopsy shows only mild structural changes which without additional biochemical analysis could be overlooked. In one case signs of recovery phase after rhabdomyolysis predominate the storage myopathy. Biochemical studies in all cases show an elevated glycogen content (2.5–4.23%). Only the from a clinical point of view most expressive patient with recurrent episodes of rhabdomyolysis exhibits a glycogen storage over 5%. All cases additionally show an absence or highly reduction of phosphorylase activity. Apart from the most expressive clinical course the extent of morphological and biochemical findings is not clearly correlated. Therefore if clinical signs suggest the diagnosis of glycogenosis type V it appears necessary to perform additional biochemical examination of muscle biopsy independent from the degree of morphological anomalies.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 43 (1965), S. 798-800 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The fine structure of a typical oncocytoma of the parotid gland reveals an excessive accumulation and hypertrophy of the mitochondria in the cells of this tumor. It is supposed, that this accumulation of mitochondria, which occurs also in oncocytes of other tissues is caused by a defect of the intramitochondrial metabolism.
    Notes: Zusammenfassung Die Zellen eines typischen Onkocytom der Gl. Parotis zeigen bei elektronenmikroskopischer Untersuchung eine exzessive Vermehrung und Vergrößerung der Mitochondrien. Als Ursache dieser bei Onkocyten verschiedenster Herkunft nachweisbaren Hyperplasie des Chondriom wird eine intramitochondriale Stoffwechselstörung angenommen.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The ultrastructure of the dog heart has been investigated during a special kind of cardioplegia with ischemia and depression of energy consumption. By this, the normal rapid regressive metabolic processes are delayed, so that the biochemical and morphological findings can be correlated exactly: the fine structure of the heart muscle is completely intact during the phase of tolerable ischemia, but cellular degeneration arises when the extreme time of tolerable ischemia is exceeded. The results underscore the usefulness of this type of cardioplegia for clinical applications.
    Notes: Zusammenfassung Die Feinstruktur des Herzens wurde im Verlauf einer speziellen Kardioplegie mit Ischämie und Senkung des Energiebedarfes (Bretschneider u. Mitarb.) untersucht. Hierbei sind die am Herzen normalerweise rasch ablaufenden regressiven Stoffwechselvorgänge so verlangsamt, daß sich biochemische und morphologische Befunde am Herzmuskel exakt korrelieren lassen: Die Feinstruktur des Herzmuskels bleibt während der Phase der sicher vom Herzen tolerierten Ischämiedauer völlig intakt; bei Erreichen der äußersten noch tolerierten Ischämiedauer ist dagegen eine zunehmende feinstrukturelle celluläre Destruktion zu erkennen. Diese entspricht der bei reiner Ischämie bereits nach etwa 5–10 min zu beobachtenden Zellschädigung. Die Ergebnisse geben einen weiteren wichtigen Hinweis für die klinische Verwendbarkeit dieser speziellen Kardioplegieform.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 54 (1976), S. 423-430 
    ISSN: 1432-1440
    Keywords: Neuromuscular disorders ; Centronuclear myopathy ; Type I-fiber atrophy ; “Myotubelike structures” ; Neuromuskuläre Erkrankungen ; centronucleäre Myopathie ; Typ I-Faser Atrophie ; “Myotube-like structures”
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird über eine Familie berichtet, in welcher sowohl die Mutter, als auch ihre beiden Töchter an einer congenitalen, langsam progredienten neuromuskulären Erkrankung leiden. Die im Rahmen der Muskelbiopsie zu erhebenden histologischen, histochemischen und ultrastrukturellen Befunde zeigen bei der Mutter das Vollbild der sog. centronucleären Myopathie. Die charakteristischen zentralständigen Kerne mit den umgebenden pericentronucleären Strukturanomalien der Fasern werden nahezu in allen Muskelfasern angetroffen. Bei den Töchtern dagegen sind morphologisch fast ausschließlich die Typ I-Fasern befallen, welche zusätzlich im Durchmesser kleiner als normal erscheinen. Der Nachweis dieser beiden Formen von centronucleärer Myopathie in einer Familie beweist, daß hier offenbar zwei morphologische Varianten, wahrscheinlich sogar Stadien eines Krankheitsbildes vorliegen. Das zusätzliche Vorhandensein einiger weiterer struktureller Besonderheiten (rod bodies, core-ähnliche Areale) unterstreicht die Verwandtschaft der Erkrankung mit anderen congenitalen langsam progredienten Myopathien (nemaline myopathy, central core disease).
    Notes: Summary This report deals with a family in which the mother and her two daughters suffer from a congenital, slowly progressive neuromuscular disease. Histological, histochemical and ultrastructural observations of the mother's muscle biopsy reveal the characteristics of the centronuclear myopathy. In this case central nuclei and pericentronuclear abnormalities of muscle fibers are found in almost all fibers. Biopsies obtained of the two daughters show alterations especially of type I-fibers, which often are smaller than normal. The presence of these two forms of centronuclear myopathy in one family indicates that these may be only different morphological types or states of one illness. Additionally, other structural findings (rod bodies, core like regions) emphasize the similarities with other congenital slowly progressive myopathies (nemaline myopathy, central core disease).
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 56 (1978), S. 97-98 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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