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  • 1
    Electronic Resource
    Electronic Resource
    Expression of Immediate Early Genes and Vasopressin Heteronuclear RNA in the Paraventricular and Supraoptic Nuclei of Rats After Acute Osmotic Stimulus (2005)
    Oxford, UK : Blackwell Science Ltd
    Journal of neuroendocrinology 17 (2005), S. 0 
    Details
    ISSN: 1365-2826
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Monitoring the expression of immediate early genes (IEGs) is useful for following stress-induced cellular responses in the neuroendocrine system. We have examined the transcriptional activities of four IEGs (c-fos, junB, NGFI-A and NGFI-B) and of the arginine vasopressin (AVP) gene in the hypothalamic paraventicular (PVN) and supraoptic nuclei (SON) of rats after acute osmotic stimuli, using in situ hybridization histochemistry. After intraperitoneal (i.p.) administration of hypertonic saline (2% body weight, 900 mOsm/kg), the expression levels of all IEG mRNAs were increased significantly both in the PVN and SON at as early as 10 min, peaked at 30 min and remained elevated until 60 min. The expression of AVP heteronuclear (hn)RNA also peaked at 30 min, and remained elevated until 180 min. Thirty min after i.p. administration of hypertonic saline (600 mOsm/kg), the expression levels of all IEG mRNAs in the PVN and SON were significantly increased in comparison with those after i.p. administration of isotonic saline (290 mOsm/kg). Regression analysis revealed that expression levels of the IEG mRNAs and AVP hnRNA were positively correlated with the plasma concentration of sodium, and the rates of increase of the expression levels of all IEG mRNAs were similar. The expression levels of all IEG mRNAs examined are useful markers for following the changes of the AVP gene transcription in the PVN and SON after acute osmotic stimuli in rats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2826.2005.01297.x
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  • 2
    Electronic Resource
    Electronic Resource
    Oestrogen-Induced Vigorous Mounting in Female Rats Carrying Hypothalamic Knife Cuts (2003)
    Oxford, UK : Blackwell Science, Ltd
    Journal of neuroendocrinology 15 (2003), S. 0 
    Details
    ISSN: 1365-2826
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In ovariectomized Wistar rats, 1- or 2-mm wide knife cuts were placed in a coronal plane from the surface of the cortex to the floor of the cranial cavity to interrupt posterior efferents of the ventromedial nucleus of the hypothalamus (VMN). Sham-operated females had the same knife lowered to a depth of 7 mm. Ovariectomized nonoperated females were also used. After recovery, all rats received a single injection of 2 µg oestradiol benzoate, and were tested 48 h later for male and female sexual behaviour and partner preference. When placed with highly receptive stimulus females, the rats with the 2-mm cut showed a significantly higher incidence of mounting with ejaculatory thrusts than any other groups. When placed with stud males, 1-mm cut, as well as sham-operated females, had increased lordosis quotients. Similarly, both 1-mm and 2-mm cuts and sham operation enhanced the incidence of ear wiggling. Despite the display of a transsexual behaviour (i.e. vigorous mounting), all females with the cut showed heterosexual partner preference. Thus, the cut in the present study removed the inhibitory neural effect on mounting, which presumably descends from the VMN. In the absence of this inhibition, minute amounts of oestrogen sufficed to induce vigorous mounting. Sham operation in the present study appeared to interfere with certain inhibitory neural circuitry for lordosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2826.2003.01040.x
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  • 3
    Electronic Resource
    Electronic Resource
    Histamine-2 receptor expression in gastric mucosa before and after Helicobacter pylori cure (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 21 (2005), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background : Helicobacter pylori infection prevents the occurrence of the tolerance phenomenon of Histamine-2 (H2) receptor antagonists. Gastro-esophageal reflux disease develops in some cases with the restoration of acid secretion after H. pylori eradication therapy.Aim : To clarify the mechanisms of H2 receptor restoration after the eradication of H. pylori on parietal cells.Methods:  We enrolled 80 consecutive asymptomatic male patients with H. pylori infection, having chronic gastritis with or without the presence of peptic ulcers. Biopsy specimens from the greater curvatures at the mid-corpus of the stomach were obtained endoscopically from all subjects before and 12 weeks after the eradication of H. pylori. Degrees of gastric atrophy were evaluated by serum pepsinogen levels. The amounts of mRNA expression of H2 receptor were evaluated in each subject's gastric mucosa by real time reverse transcriptase-polymerase chain reaction (RT-PCR).Results : H2 receptor mRNA expression levels significantly correlated with serum pepsinogens I and II ratios. The expression level of H2 receptor mRNA was lower in subjects with hypergastrinemia. The median expression level of H2 receptor after H. pylori eradication was threefold greater than prior to treatment. In addition, its restoration became more pronounced in subjects with severe gastric atrophy. However, a comparatively low restoration of H2 receptor mRNA was found in subjects with hypergastrinemia.Conclusions : H2 receptor mRNA levels decrease with the progression of gastric atrophy induced by H. pylori infection, and are restored after H. pylori eradication. Such expression levels of H2 receptor may explain a part of the tolerance phenomenon to H2 receptor antagonists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.2005.02481.x
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  • 4
    Electronic Resource
    Electronic Resource
    Ruptured Aneurysm at the Bifurcation of the Posterior Meningeal Artery from the Proximal Posterior Inferior Cerebellar Artery (1998)
    Springer
    Acta neurochirurgica 140 (1998), S. 629-630 
    Details
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007010050152
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of protizinic acid on leukokinin generation and its physiological action (1984)
    Springer
    Inflammation research 14 (1984), S. 699-706 
    Details
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effect of protizinic acid (PRT), a non-steroidal antiinflammatory drug, on thein vivo leukokinin (LK) generation system using feline acute ischemia model,in vitro LK generation system and the LK-induced contraction of the isolated smooth muscle was investigated. When 3 mg/kg PRT was injected twice intravenously to cats with acute cardiac ischemia, increased blood acid protease activity was inhibited and significant inhibitory action on the decrease of leukokininogen, the precursor of LK, was observed. Simultaneously, ST-segment elevation on the electrocardiogram tended to be suppressed and the lowered mean aortic blood pressure was significantly restored. On the LK generation induced by rabbit kininogen and acid protease derived from mouse L-1210 leukemic cells or rabbit polymorphonuclear leukocytes, PRT showed a dosedependent inhibition while indomethacin (IM) and ibuprofen (IB) at a concentration of 3×10−4 M showed no effect. However, potencies of the inhibitory actions of PRT, IM and IB on the LK generation induced by bovine spleen cathepsin D were almost the same at a concentration of 3×10−4 M. Furthermore, PRT as well as IM showed antagonistic action on the isolated rat uterine contraction induced by LK. These results suggest that PRT not only inhibits thein vitro andin vivo generation of LK but also antagonizes to it on the receptor site of LK.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01978911
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  • 6
    Electronic Resource
    Electronic Resource
    An intra-arterial electrode for intracranial electro-encephalogram recordings (1995)
    Springer
    Acta neurochirurgica 136 (1995), S. 103-105 
    Details
    ISSN: 0942-0940
    Keywords: Electrodes ; intra-arterial ; electro-encephalography ; epilepsy surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A new method for intracranial monitoring of brain electrical activity by means of an intra-arterial guide wire as electrode is described. We carried out intracranial electro-encephalography (EEG) using an insulated Seeker Lite-10 guide wire 18 times in 14 patients: ten times in 6 patients with cerebral arteriovenous malformation (AVM) before embolization, and another 8 times in 8 patients with epilepsy. In all cases, a 2–5 times stronger high voltage potential EEG compared with scalp EEG could be recorded. In 3 patients with complex partial epilepsy, intra-arterial (IA) EEG was recorded under subdural strip electrode monitoring, and IAEEG at the sphenoidal portion of the middle cerebral artery was compared with subdural electrode recordings. Frequent interictal spike discharges recorded with subdural electrodes in the lesional medial temporal lobe were simultaneously visible on IAEEG recording. This method is equivalent to that using a semi-invasive electrode, but ECoG recording can be performed at angiography. IAEEG is a method of electrode recording that has the possibility of clinical application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411445
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  • 7
    Electronic Resource
    Electronic Resource
    Cervical Infarction Associated with Vertebral Artery Occlusion due to Spondylotic Degeneration: Case Report (1998)
    Springer
    Acta neurochirurgica 140 (1998), S. 981-985 
    Details
    ISSN: 0942-0940
    Keywords: Keywords: Cervical infarction; cervical spondylosis; magnetic resonance; vertebral artery occlusion.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary  Cases of cervical infarction with clearly documented evidence of the underlying aetiology and associated neuroradiological abnormalities have not been frequently reported. A rare case of cervical infarction caused by midvertebral artery occlusion due to spondylotic degeneration of the spine is described. The most probable aetiological factor affecting this disease entity, and the usefulness of magnetic resonance imaging in the detection of this rare lesion, are briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007010050202
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  • 8
    Electronic Resource
    Electronic Resource
    Two-Stage Skull Base Surgery for Tumours Extending to the Sub- and Epidural Spaces (1998)
    Springer
    Acta neurochirurgica 140 (1998), S. 891-898 
    Details
    ISSN: 0942-0940
    Keywords: Keywords: Benign brain tumour; skull base surgery; staged operation.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary  The surgical management of extensive skull base neoplasms, which often extend to both the sub- and epidural spaces, is still a great challenge with considerable risk. The authors report 12 cases in which a two-stage operation was performed for such nonmalignant tumours.  The series consisted of four cavernous sinus meningiomas, one sphenoid-ridge meningioma, one cerebello-pontine angle meningioma, three pituitary adenomas, two chordomas, and one fibroma. Our operative strategy involved removal of the epidural part of the tumour and extensive skull base reforming during the first stage. After approximately one month, the second stage operation was performed by removing the residual subdural parts and the affected dura, which were less vascular, with dural plasty and subsequent spinal drainage. No complications such as cerebrospinal fluid (CSF) leakage or infection were observed. During the long-term follow-up (1.4 to 4.6 years, with a mean of 2.7 years), tumour recurrence was observed in a single case.  In conclusion, the major advantages of this procedure were as follows: [1] improvement of the total removal rate, [2] prevention of postoperative CSF leak and infection, [3] residual tumours were avascular, necrotic, and dwindling, and also shifted outwards resulting in less adhesions to the brain. Although it may counter the trend toward less invasive procedures, the two-staged skull base surgery warrants serious consideration as an option for the management of patients with such extensive cranial base tumours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007010050190
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  • 9
    Electronic Resource
    Electronic Resource
    Local Bone Turnover in the Metaphysis of the Proximal Tibia and the Lumbar Vertebra During the Early Periods After Ovariectomy in Rats (1996)
    Springer
    Calcified tissue international 58 (1996), S. 52-59 
    Details
    ISSN: 1432-0827
    Keywords: Key words: Histomorphometry — Osteoclast — Bone formation rate — Intact osteocalcin — Tartrate-resistant acid phosphatase.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. To clarify the local changes in bone formation and resorption during the early period after ovariectomy (OVX), 200 SD rats, 4 months of age, underwent OVX or sham surgeries and seven to nine rats from each group were terminated at 1, 3, 7, 11, 15, 19, 23, 28, 35, 63, and 91 days postsurgery after tetracycline labeling. Serum intact osteocalcin levels were measured. Undecalcified sections of the 5th lumbar body (L5) and the right proximal tibia were measured for trabecular bone area, the labeled perimeters and the interlabeling distances after Villanueva's staining. On the 4th lumbar body (L4) and the left proximal tibia, undecalcified sections were measured for the trabecular osteoclast by tartrate-resistant acid phosphatase staining. The uterine horns were atrophied on the 3rd postovariectomy day (day 3). Serum osteocalcin levels increased on day 7 and reached the highest value on day 23. In either L5 or the metaphysis of the proximal tibia, trabecular bone volume (BV/TV) significantly decreased on day 15. The trabecular bone loss on day 28 was approximately 50% in the tibia and 15% in the L5. In either the lumbar or the tibia, osteoclast numbers significantly increased at day 3, and peaked between days 15 and 23. In the tibia, however, the bone formation rates (BFR/BS) were significantly reduced on the 3rd and 7th postsurgical days compared with the start value for both the OVX and sham groups. The BFR/BS values in L5 did not decrease during the first 7 days in either group. The BFR/BS values were then increased for both L5 and the tibia after day 7. These data clearly demonstrated that the local bone turnover 7 days post-OVX was identical in the proximal tibia and the lumbar vertebra. In the proximal tibia, however, it may be suggested that the increased bone resorption and reduced formation within 7 days after OVX due to the combined effects of both an estrogen deficiency and the surgical intervention would possibly play a critical role in the greater magnitude of the trabecular bone loss.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002239900010
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  • 10
    Electronic Resource
    Electronic Resource
    Traumatic arteriovenous fistula treated by superselective embolisation with microcoils: case report (1995)
    Springer
    Neuroradiology 37 (1995), S. 65-67 
    Details
    ISSN: 1432-1920
    Keywords: Head injury ; Dural arteriovenous fistula ; Embolisation Microcoil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 27-year-old man with a traumatic direct dural arteriovenous fistula (DAVF) was treated using embolisation microcoils. He had suffered blunt trauma to the head while drunk and was aware of no neurological deficit. A few days after the accident, however, he noticed a bruit in the right temple. Angiography demonstrated a direct DAVF fed by the right middle meningeal artery and draining into a right temporal dural vein and the ipsilateral cavernous sinus. A Tracker-18 catheter was passed without difficulty through the fistula and the draining vein was then embolised from distal to proximal with microcoils, and finally the fistula was occluded with microcoils, resulting in total obliteration of the fistula. Immediately after the embolisation, the patient could no longer hear the bruit. Thus, when a microcatheter can be introduced into the draining vein, microcoils can be used as emboli in the treatment of direct DAVF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588523
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