Aim: The substantia nigra pars compacta (SNc), a vital part of the brain that produces dopamine, is being closely studied due to its potential role in the monoamine hypothesis, which aims to explain the causes of Major Depressive Disorder (MDD). Dopamine, a chemical messenger in the brain, is linked to the monoamine hypothesis, suggesting that imbalances in these chemicals may contribute to MDD. This study aimed to calculate volumetric changes in the substantia nigra (SN), using brain magnetic resonance imaging (MRI) in individuals diagnosed with MDD.
Material and Method: Sixty-six participants, comprising 33 individuals diagnosed with MDD (mean age=44.30±13.98 years) and 33 healthy individuals (mean age=46.27±14.94 years), were recruited from the university hospital psychiatry outpatient clinic. In the MDD group, there were 15 male participants (45%) and 18 female participants (55%). The healthy control group consisted of 28 males (84.8%) and 5 females (16.2%). Potential confounding factors, such as underlying chronic diseases, were ruled out by the clinician through a thorough examination of the patient's medical history, ensuring the study outcomes were not influenced. Three-dimensional brain MRI scans were conducted using a 1.5 Tesla MRI scanner. Volumes of the SN and midbrain were automatically computed using MRIStudio, an atlas-based image analysis program.
Results: Statistically significant higher volumes were observed in the right SN in the MDD group compared to controls (0.146±0.045 cm³ vs. 0.122±0.035 cm³, p=0.02, p<0.05). The ratio of SN to midbrain volume was higher in MDD patients on both sides, with a 22.4% higher value on the right side and a 12.7% higher on the left side relative to controls (p=0.002 for the right, p=0.01 for the left; p<0.05). Moreover, a negative correlation between left and right SN volumes and age was identified in the MDD group (p=0.01 for the left, p=0.05 for the right side; p<0.05).
Conclusion: Our study revealed an increase in SN volume in MDD patients. Identifying volumetric discrepancies in brain regions responsible for dopamine release could hold significant value in elucidating the underlying causes of the disease and guiding treatment strategies.
Dopamine magnetic resonance imaging major depressive disorder substantia nigra
| Birincil Dil | İngilizce |
|---|---|
| Konular | Psikiyatri, Anatomi |
| Bölüm | Araştırma Makalesi |
| Yazarlar | |
| Gönderilme Tarihi | 26 Aralık 2023 |
| Kabul Tarihi | 9 Şubat 2024 |
| Yayımlanma Tarihi | 16 Mayıs 2024 |
| Yayımlandığı Sayı | Yıl 2024 Cilt: 6 Sayı: 2 |
Chief Editors
Prof. Dr. Berkant Özpolat, MD
Department of Thoracic Surgery, Ufuk University, Dr. Rıdvan Ege Hospital, Ankara, Türkiye
Editors
Prof. Dr. Sercan Okutucu, MD
Department of Cardiology, Ankara Lokman Hekim University, Ankara, Türkiye
Assoc. Prof. Dr. Süleyman Cebeci, MD
Department of Ear, Nose and Throat Diseases, Gazi University Faculty of Medicine, Ankara, Türkiye
Field Editors
Assoc. Prof. Dr. Doğan Öztürk, MD
Department of General Surgery, Manisa Özel Sarıkız Hospital, Manisa, Türkiye
Assoc. Prof. Dr. Birsen Doğanay, MD
Department of Cardiology, Ankara Bilkent City Hospital, Ankara, Türkiye
Assoc. Prof. Dr. Sonay Aydın, MD
Department of Radiology, Erzincan Binali Yıldırım University Faculty of Medicine, Erzincan, Türkiye
Language Editors
PhD, Dr. Evin Mise
Department of Work Psychology, Ankara University, Ayaş Vocational School, Ankara, Türkiye
Dt. Çise Nazım
Department of Periodontology, Dr. Burhan Nalbantoğlu State Hospital, Lefkoşa, North Cyprus
Statistics Editor
Dr. Nurbanu Bursa, PhD
Department of Statistics, Hacettepe University, Faculty of Science, Ankara, Türkiye
Scientific Publication Coordinator
Kübra Toğlu
argistyayincilik@gmail.com
Franchise Owner
Argist Yayıncılık
argistyayincilik@gmail.com
Publisher: Argist Yayıncılık
E-mail: argistyayincilik@gmail.com
Phone: 0312 979 0235
GSM: 0533 320 3209
Address: Kızılırmak Mahallesi Dumlupınar Bulvarı No:3 C-1 160 Çankaya/Ankara, Türkiye
Web: www.argistyayin.com.tr