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Yıl:2008; Cilt: 18; Sayı: 4>> Özet
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Klinik Psikofarmakoloji Bülteni; 2008;18(4):259-265
Ağrılı Sendromlarda serum beyin-türevli nörotrofik faktör düzeyleri: Major depresyon ile kontrollü bir çalışma
EO Taşkın, Ö Aydemir, A Deveci, F Taneli, D Selçuki, L Cerrahoğlu, AE Danacı
Celal Bayar Üniversitesi Tıp Fak. Psikiyatri AD, Manisa
Amaç: Bu çalışmada, ağrılı semdromların ortaya çıkmasında stresin rolünün araştırılması amacıyla migren ve fibromiyalji tanılı hastaların serum Beyin-türevli Nörotrofik Faktör (BDNF) düzeyleri depresif hastaların ve sağlıklı kontrollerin düzeyleri ile karşılaştırılmıştır. Yöntem: Önceden herhangi bir psikiyatrik tanısı olmayan ve antidepresan tedavi kullanmamış olan 27 migren tanılı hasta ve 19 fibromiyalji tanılı hasta çalışmaya alınmıştır. Depresyon grubuna ise en az sekiz haftadır antidepresan tedavi kullanmayan major depresif bozukluk tanılı 24 hasta dahil edilmiştir. Bu grupta da depresyona eşlik eden başka bir birinci eksen tanısı olan hasta yoktur. Herhangi bir psikiyatrik tanısı bulunmayan ve psikiyatrik tedavi kullanmamış olan 26 sağlıklı denek kontrol grubunu oluşturmuştur. Tüm gruplardaki deneklerin depresyon ve diğer eksen I tanılarının değerlendirlmesi için DSM- IV için Yapılandırılmış Klinik Görüşme Kılavuzu (SCID-I) kullanılarak tanısal görüşme yapılmıştır. Deneklerin depresyon şiddetinin belirlenmesi için Hamilton Depresyon Derecelendirme Ölçeği (HAM-D) kullanılmıştır. Migren tanısı için Uluslararası Başağrısı Birliği’nin belirlediği ölçütlere göre konmuştur. Fibromiyaljı tanısı için ise American College of Rheumatology ölçütleri kullanılmıştır. Fibromiyalji ve migren hastalarında ağrı şiddeti visual analogue scale (VAS) ile değerlendirilmiştir. BDNF ölçümü için serum örneği -70°C derecede saklanmış ve kit ile beraber verilen Block ve Sample solüsyon ile dilüe edildikten sonra ELISA Kit (Promega; Madison, WI, ABD) ile çalışılmıştır. Verilerin değerlendirilmesinde, serum BDNF değerlerinin ortalamalarının kıyaslanması için Kruskal Wallis testi uygulanmıştır. Serum BDNF düzeylerinin yaşla ilişkisinin değerlendirilmesinde Spearman sıralı korelasyon testi, cinsiyetle ilişkisinin değerlendirilmesinde Bonferroni düzeltmeli Mann Whitney U testi kullanılmıştır. Serum BDNF düzeylerinin HAM-D ve VAS puanları arasındaki ilişkinin test edilmesi için Spearman sıralı korelasyon testi uygulanmıştır. Bulgular: Depresyon grubunun serum BDNF düzeyleri (21.2±11.3 ng/ml), migren grubunun (32.2±10.1 ng/ml), fibromiyalji grubunun (30.7±8.9 ng/ml) ve kontrol grubunun (31.4±8.8 ng/ml) düzeylerinden istatistiksel olarak anlamlı düzeyde düşük bulunmuştur (p<0.0001). Migren, fibromiyalji ve kontrol grupları arasında serum BDNF düzeyleri açısından istatistiksel olarak anlamlı bir farklılık bulunmamıştır. Serum BDNF düzeyleri ile, yaş ve cinsiyet arasında istatistiksel olarak anlamlı bir ilişki yoktur. Ağrılı sendromlarda HAM-D ve VAS puanları ile serum BDNF düzeyleri arasında istatistiksel olarak anlamlı bir korelasyon olmadığı görülmüştür (sırası ile r= 0.085; p= 0.579 ve r= 0.191; p= 0.204). benzer şekilde depresyon grubunda da serum BDNF düzeyleri ile HAM-D puanları arasında anlamlı bir ilişki yoktur (r= 0.122; p= 0.579). Sonuçlar: Ağrılı sendromlar stres ile ilişkilendirilse bile, bu çalışmada, stresin bir belirteci olan serum BDNF düzeyi bu görüşü desteklememiştir. Bu durumun nedeni fibromiyalji veya migren gibi ağrılı sendromlarda serum BDNF düzeylerinin periferik trombosit işlevlerindeki değişimlerden etkilenmesi olabilir. Öte yandan belli bir düzeyde kalan kronik stres durumlarından serum BDNF düzeylerinin etkilenmiyor olması da bu durumda rol oynamış olabilir
Serum brain-derived neurotrophic factor levels in pain syndromes: A comparative study with major depression
Objective: In this study, it is aimed to compare the level of Brain-Derived Neurotrophic Factor (BDNF) of patients with migraine and fibromyalgia to that of depressive patients and healthy subjects in order to answer the question whether stress is related to pain syndromes. Methods: In the migraine group 27 patients and in the fibromyalgia group 19 patients without any previous antidepressant treatment and psychiatric diagnosis were included. In the depression group, 24 patients with at least eight weeks of antidepressant-free period were invited to the study. In the depression group no co-morbid diagnosis in the first axis was made. Twenty-six subjects without any previous psychiatric diagnosis and psychiatric treatment consisted the control group. For making diagnosis of depression and other first axis disorders Structured Clinical Interview for DSM- IV (SCID-I) was used in all study groups. For the assessment of the severity of depression Hamilton Depression Rating Scale (HAM-D) was applied. The diagnosis of migraine was made according to the criteria of International Headache Society. For the diagnosis of the fibromyalgia the criteria of American College of Rheumatology was used. The severity of pain was assessed with visual analogue scale (VAS) in the migraine and fibromyalgia groups. Serum BDNF was kept at -70°C before testing, and assayed with an ELISA Kit (Promega; Madison, WI, USA), after dilution with the Block and Sample solution provided with the kit. The data were subjected to Kruskal Wallis Test in the comparison of serum BDNF levels. Results: The serum BDNF level of the depression group (21.2±11.3 ng/ml) was statistically lower (p<0.0001) than the level of the migraine group (32.2±10.1 ng/ml), fibromyalgia group (30.7±8.9 ng/ml) and the control group (31.4±8.8 ng/ml). The level of BDNF was not significantly different in the migraine, fibromyalgia and control groups. There was no significant correlation between serum BDNF levels, and age and gender. In pain syndromes there was no signification correlation between serum BDNF levels, and mean scores of HAM-D and VAS (r= 0.085; p= 0.579 and r= 0.191; p= 0.204 respectively). Similarly there was no significant correlation between serum BDNF levels and HAM-D scores in the depression group (r=0.122; p= 0.579). Conclusions: Even though the pain syndromes were suggested to be associated with stress, in this present work, serum BDNF level as one of the markers of stress does not support this hypothesis. This might be related to the factor that in pain syndromes such as fibromyalgia or migraine, serum BDNF level may be affected by the alteration in peripheral platelet functions. Furthermore in a limited chronic stress serum BDNF levels tend to be not affected and this may play a significant role in our results.

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