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Journal Article 2001; 22(1): 53-73 PubMed PMID: 11393163 Citation  Keywords:  Adrenal Glands:physiology, Animals, Biological Clocks, Blood Pressure:physiology, Chronobiology Disorders:physiopathology, Chronobiology Phenomena, Chronotherapy, Circadian Rhythm:physiology, Drug Administration Schedule, Genomics, Homeostasis, Humans, Pi.   

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Journal Article 2001; 22(1): 53-73 PubMed PMID: 11393163 Citation  Keywords:  Adrenal Glands:physiology, Animals, Biological Clocks, Blood Pressure:physiology, Chronobiology Disorders:physiopathology, Chronobiology Phenomena, Chronotherapy, Circadian Rhythm:physiology, Drug Administration Schedule, Genomics, Homeostasis, Humans, Pi.   

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Case Reports 2008; 29(6): 874-876 PubMed PMID: 19112420 Citation  Keywords:  Aged, Anti-Inflammatory Agents:therapeutic use, Autoimmune Diseases:complications, Azathioprine:therapeutic use, Diabetes Insipidus:etiology, Female, Humans, Hypothalamic Diseases:complications, Immunosuppressive Agents:therapeutic use, Methylprednisolone.   

: Autoimmune hypothalamitis is a rare autoimmune neuroendocirne disease. A case of a 70-year-old female with autoimmune hypothalamitis was reported. The chief clinical characteristics were diabetes insipidus and adenopituitary function deficiency. Cranial magnetic resonance imaging (MRI) scan indicated a mass in the hypothalamus. The diagnosis of autoimmune hypothalamitis was presumed. After treatment with prednisone, there was a marked reduction in the mass and the hypothalamus-adenopituitary function partially improved. However, after glucocorticoid therapy was withdrawn, the hypothalamic lesion relapsed progressively. High dose methylprednisolone pulse therapy (HDMPT) in combination with azathioprine was initiated thereafter. During follow-up, MRI scan indicated the lesion shrank strikingly, and the patient's clinical condition improved as well. In view of the good response of the hypothalamic lesion to glucocorticoid and immunodepressant, the putative diagnosis of autoimmune hypothalamitis was confirmed. This case report suggested that HDMPT in combination with azathioprine therapy might be an effective trial for autoimmune hypothalamitis treatment....

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Journal Article 2008; 29(6): 815-821 PubMed PMID: 19112419 Citation  Keywords:  Animals, Chronobiology Disorders:complications, Circadian Rhythm, Humans, Melatonin:physiology, Neoplasms:etiology,.   

: For two decades, research has been suggested and conducted into the causation and development of cancers in seemingly diverse and unrelated populations such as blind individuals, shift-workers, flight personnel, Arctic residents and subsets of sleepers. One common denominator of these investigations is "melatonin". Another common denominator is that all these studies implicitly pursued the validity of the so-called "melatonin hypothesis", of a corollary and of associated predictions which can be united in our proposed theory of "carcinogenesis due to chronodisruption". The new theory suggests that the various predictions investigated between 1987 and 2008 represent different aspects of the same problem. Indeed, abundant experimental evidence supports the notion that the final common cause of many cases of cancer may be what has been termed chronodisruption (CD), a relevant disturbance of the temporal organization or order of physiology, endocrinology, metabolism and behaviour. While melatonin as a key time messenger and time keeper can be a marker of CD, it is probably only partially related to the differential cancer occurrence apparent in individuals who chronically or frequently experience an excess or deficit of chronodisruption....

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Journal Article 2008; 29(6): 1015-120 PubMed PMID: 19112418 Citation  Keywords:  Adaptation, Physiological, Adrenal Medulla:enzymology, Analysis of Variance, Animals, Catecholamines:biosynthesis, Dopamine beta-Hydroxylase:genetics, Gene Expression Regulation:physiology, Immobilization, Male, Phenylethanolamine N-Methyltransferase:gene.   

OBJECTIVE: Isolation of adult animals represents a form of psychsocial stress that produces sympatho-adrenomedullar activation. The aim of this work was to investigate the changes in gene expression and protein levels of catecholamine biosynthetic enzymes: tyrosine hydroxylase (TH), dopamine-beta-hydroxylase (DBH) and phenylethanolamine N-methyltransferase (PNMT) in the adrenal medulla of naive control and chronically (12 weeks) socially isolated adult Wistar rat males and the response of these animals to additional immobilization stress (2 h).

METHODS: TH, DBH and PNMT mRNA levels were quantified by quantitative real-time RT-PCR (qRT-PCR). TH, DBH and PNMT immunoproteins were assayed by Western Blot.

RESULTS: In chronically isolated rats, gene expression levels of catecholamine biosynthetic enzymes in the adrenal medulla were decreased, but only TH mRNA was significantly decreased. However, protein levels of TH, DBH and PNMT of these animals were elevated by 55%, 20% and 18%, respectively, in relation to the corresponding control. Naive control and chronically socially isolated rats exposed to additional 2-h-immobilization showed increased gene expression of the examined enzymes, the increase being greater in socially isolated rats as compared to the controls. Additional immobilization of naive controls did not affect TH, DBH and PNMT protein levels. In contrast, this stress produced increased TH, DBH and PNMT protein levels in long-term socially isolated rats.

CONCLUSION: We can conclude that psychosocial stress expressed a differential influence on gene expression and protein levels of catecholamine biosynthetic enzymes in the adrenal medulla of adult rats. The results indicate a possible adaptation of catecholamine-synthesizing system at the level of TH gene expression in adrenal medulla of chronically isolated animals....

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Case Reports 2008; 29(6): 867-870 PubMed PMID: 19112415 Citation  Keywords:  Adult, Brain Neoplasms:complications, Central Nervous System Neoplasms:complications, Humans, Lymphoma, B-Cell:complications, Magnetic Resonance Imaging, Male, Multiple Sclerosis, Relapsing-Remitting:complications,.   

: We present the patient with the diagnosis of multiple sclerosis (MS), relapsing-remitting form with long lasting remission. Unexpectedly, this patient presented dramatical clinical deterioration and revealed clinical symptoms such as bradypsychia, cognitive symptoms, central vestibulare syndrome, spastic quadruparesis. Clinical findings suggested secondary progressive MS, but MRI called in question this diagnosis. The MRI appearance suggested, that MS had been complicated by a different brain pathological lesion, and the brain biopsy was indicated. A histological examination confirmed primary CNS lymphoma (PCNSL). This case exemplifies important aspects of clinical neurology. A re-evaluation of the diagnosis of MS should always be performed in a patient when new symptoms are presented that are unusual or could be due to other pathological processes. MRI offers the highly sensitive way to detect the coexistence of MS and other brain disease. Primary goal of imaging modalities is differential diagnosis between demyelinating diseases, such as MS and other brain lesions. Advanced focus demand contrast- enhancing and mass- effect lesions. It is important to realize, that contrast-enhancement and brain edema may be mitigated by treatment with corticosteroids. In some cases a brain biopsy is needed....

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Journal Article 2008; 29(6): 822-830 PubMed PMID: 19112414 Citation  Keywords:  Anesthesia, General:psychology, Animals, Brain:drug effects, Cognition:drug effects, Consciousness:drug effects, Humans, Psychophysiology,.   

: An explanation of consciousness is one of the major unsolved problems of modern science. The modern view of consciousness arose in the nineteenth century; the view presumed that mental activity correlates with distinct physical states. Is the problem of consciousness real? Crick and Koch made a tentative assumption that all different aspects of consciousness (pain, seeing, thinking, emotion, self-consciousness) are connected by a basic common mechanism. The next step towards understanding involved the neuronal theories of consciousness (correlates of consciousness), often referred as the NNC (neural correlates of consciousness). Many neuroscientists presume that consciousness must have a neuronal correlate. The neuroscience of anaesthesia can be defined as studying the effect of anaesthetic agents on consciousness and the preconsciousness brain mechanisms of cognitive function. Some of these mechanisms, such as recognition of the novel stimuli, are still present in deep anaesthesia, during continuous suppression. Anaesthesia is not "an all or nothing" phenomenon and consciousness awareness with explicit memory represents only one part of the spectrum of cognitive functions. The introduction of safe general anaesthesia represents one of the most important, although under-appreciated, advances in modern surgery. There is some difficulty in defining the term "consciousness" in relation to the anaesthetic state. The difference in brain activity between those under anaesthesia and those not under any such influence....

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Journal Article 2008; 29(6): 958-964 PubMed PMID: 19112413 Citation  Keywords:  Analysis of Variance, Animals, Estrous Cycle:metabolism, Female, Follicle Stimulating Hormone, beta Subunit:analysis, Follistatin:analysis, Gene Expression Regulation:physiology, Gonadotropin-Releasing Hormone:antagonists & inhibitors, Hormone Antagonists.   

OBJECTIVES: Neural control of the anterior pituitary function consists of the interplay of neuropeptides action, gonadal steroid hormones and many other factors. The physiological effect of this regulatory action is the release and synthesis of protein hormones in the precise time and quantity. The main factor responsible for the gonadotropins release and synthesis is the gonadotropin-releasing hormone (GnRH). We must still study the modulation of the synthesis of the gonadotropins subunits - LHbeta, FSHbeta and alpha subunit by different forms of GnRH and by its analogs, in order to better understand the regulation of gonadotropin release and synthesis. THE AIM of this study was to develop real-time PCR assays of five candidate reference genes for normalization purposes in order to quantify target transcripts in anterior pituitary cells during the preovulatory period. Moreover, we focused on the influence of GnRH receptor antagonist (antide) treatment on mRNA expression levels of GPalpha, LHbeta, FSHbeta, FST(follistatin) and PRL(prolactin) genes in these cells.

MATERIAL AND METHODS: Anterior pituitary cells were obtained from pituitary glands of four mature pigs at the preovulatory phase. Cells were incubated with or without antide and relative mRNA level of target genes was measured using the Applied Biosystems 7500 Real Time System. For an exact comparison of mRNA quantity, the stability of five reference genes, ACTB, B2M, GAPDH, RPL1, and TOP2B was evaluated to choose the most appropriate reference gene for qRT-PCR normalization in the pituitary cells. Expression stability of reference genes was calculated using the geNorm application. The developed method of PCR assay was applied to study gene expression in pig pituitary cells in short culture.

RESULTS: The most stably expressed genes in the pituitary cells were GAPDH and TOP2B. The expression of ACTB, B2M and RPL1 appeared to be highly unstable. After normalization to the GAPDH/TOP2B, results showed that the mRNA expression of the FSHbeta gene was highest in comparison with LHbeta, GPalpha, FST and PRL genes (p<0.005). Pre-treatment of cells by the antide resulted in lower mRNA expression of these genes, while FSHbeta mRNA had a significantly lower expression (p<0.05) in comparison with control.

CONCLUSIONS: Real-time PCR analysis of the expression of LHbeta, FSHbeta, alpha subunit, follistatin and prolactin genes in porcine anterior pituitary cells during the preovulatory period is suitable for the study of modulatory action of metal complexes with GnRH on the expression of these genes....

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