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![]() Open Journal of Depression 2013. Vol.2, No.4, 43-44 Published Online November 2013 in SciRes (http://www.scirp.org/journal/ojd) http://dx.doi.org/10.4236/ojd.2013.24009 Open Access 43 Blood Pressure and Depressive Symptoms Yongpin Mu1*, Yongqing Gao2*, Wenjie Sun2,3# 1Department of Clinical Laboratory Centre, The Affiliated People’s Hospital of Inner Mongolia Medical University, Hohhot, China 2School of Food Science, G uan gdo ng Ph armaceutical University , Gua ngzho u, China 3School of Public Health and Tropical M edicine, Tulane University, New Orleans, USA Email: #[email protected] Received August 7th, 2013; revised Septe mber 8 th, 2013; accepted Octob e r 10th, 2013 Copyright © 2013 Yongpin Mu et al. This is an open access article distributed under the Creative Commons At- tribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The topic of blood pressure and depression is an old question. Depression is common in the elderly population (Sun, School- ing, Chan, Ho, & Lam, 2011). Although several epidemiologic studies have assessed the relationship between low blood pres- sure and depressive symptoms in geriatric populations, the results have been inconsistent. Depressive symptoms used to be been considered a risk factor associated with development of hypertension (Hildrum, Romild, & Holmen, 2011). Recently, additional evidence showed that depressive symptoms are asso- ciated with low blood pressure (Licht et al., 2009; Scuteri et al., 2009). These results suggest a complicated association between blood pressure and depression. It is po ssi bl y a “U” s ha ped r e- sponse, with to o low or too hig h sy stolic blood pressu re both associated with depression (Barrett-Connor & Palinkas, 1994). This relationship leads to the question: does depression cause the reduced blood pressure or does a reduced blood pressure cause the depression? It is plausible that low blood pressure results in depressive symptoms in the elderly. A prospective community-based study found that low blood pressure can pre- dict the depression (Siennicki-Lantz, Andre-Petersson, & Elm- stahl, 2013). Depressive symptoms could be predicted by hy- pertension earlier in life, and were strongly associated with decreasing Systolic blood pressure (SBP) during the last decade (Siennicki-Lantz, Andre-Petersson, & Elmstahl, 2013). How- ever, the link between blood pressure and depression could be reversed (Heckbert et al., 2010; Hildrum, Mykletun, Holmen, & Dahl, 2008; Lenoir et al., 2008). Moreover, Paterniti et al. point out that low blood pressure was a risk factor for, but not a con- sequence of, increasing depressive symptoms (Paterniti, Ver- dier-Taillefer, Geneste, Bisserbe, & Alperovitch, 2000). One plausible mechanism to explain this correlation is that there is one gene from the ancestor that affects both blood pressure and depression. There are many confounding factors that can affect the cor- relation in depression and blood pressure. The relationship also can be explained by other factor such as the health status, pre- vious diseases, and post-traumatic stress (Kamphuis et al., 2008; Scuteri, 2008; Signorelli, Costanzo, Cinconze, & Concerto, 2013). Pre-existing diseases like cardiovascular disease, espe- cially heart diseases such as stroke, may affect both blood pressure and depression. In this hypothesis blood pressure and depression are both related to another factor. New research has found that frontal-striatal white matter integrity may be the anatomical region through which blood pressure confers vul- nerability to depression (Hoptman et al., 2008). There is a neg- ative relationship between SBP and depression in the group of people whose functional ability is normal, but no relationship exists in people with moderately or severely damaged white matter. Functional changes in this region from pre-existing diseases can affect the relationship between blood pressure and depres- sion. Without a large sample size community-based perspective study, it is not easy to draw a conclusion on the relationship between blood pressure and depression. As Mark Twain said, “supposing is good, but finding out is better”. In order to figure out the relationship, further research will be required to clarify causal pathways, in particular: 1) whether low blood pressure and depression are both secondary to previous diseases; and/or 2) whether low blood pressure is a marker for other, more psy- chological risk factors for depression, such as the impact of poor physical health and functional limitation (Stewart, 2000). REFERENCES Barrett-Connor, E., & Palinkas, L. A. (1994). Low blood pressure and depression in older men: A population based study. BMJ, 308, 446- 449. Heckbert, S. R., Rutter, C. M., Oliver, M., Williams, L. H., Ciech- anowski, P., Lin, E. H., & Von Korff, M. (2010). Depression in rela- tion to long-term control of glycemia, blood pressure, and lipids in patients with diabetes. Journal of General Internal Medicine, 25, 524-529. http://dx.doi.org/10.1007/s11606-010-1272-6 Hildrum, B., Mykletun, A., Holmen, J., & Dahl, A. A. (2008). Effect of anxiety and depression on blood pressure: 11-year longitudinal po- pulation study. The Briti sh J ou r n al of P sy c h ia t ry , 19 3 , 108-113. http://dx.doi.org/10.1192/bjp.bp.107.045013 Hildrum, B., Romild, U., & Holmen, J. (2011). Anxiety and depression lowers blood pressure: 22-year follow-up of the population based HUNT study, Norway. BMC Public Health, 11, 601. http://dx.doi.org/10.1186/1471-2458-11-601 Hoptman, M. J., Gunning-Dixon, F. M., Murphy, C. F., Ardekani, B. A. , Hrabe, J., Lim, K. O., & Alexopoulos, G. S. (2008). Blood pressure and white matter integrity in geriatric depression. Journal of Affec- tive Disorders, 115, 171-176. Kamphuis, M. H., Geerlings, M. I., Giampaoli, S., Nissinen, A., Grob- *These authors contributed equally to this work. #Correspo nding author. ![]() Y. P. MU ET AL. Open Access 44 bee, D. E., & Kromhout, D. (2008). The association of depression with cardiovascular mortality is partly explained by health status. The FINE study. Journal of Affecti ve Dis order s, 114, 184-192. Lenoir, H., Lacombe, J. M., Dufouil, C., Ducimetiere, P., Hanon, O., Ritchie, K., & Tzourio, C. (2008). Relationship between blood pres- sure and depression in the elderly. The three-city study. Journal of Hypertension, 26, 1765-1772. http://dx.doi.org/10.1097/HJH.0b013e3283088d1f Licht, C. M., d e Geus, E. J., Seldenri jk, A., van Hout, H. P ., Zitman, F. G., van Dyck, R., & Penninx, B. W. (2009). Depression is associated with decreased blood pressure, but antidepressant use increases the risk for hyper tension. Hypertension, 53, 631- 638. http://dx.doi.org/10.1161/HYPERTENSIONAHA.108.126698 Paterniti, S., Verdier-Taillefer, M. H., Geneste, C., Bisserbe, J. C., & Alperovitch, A. (2000). Low blood pressure and risk of depression in the elderly. A prospective community-based study. The British Jour- nal of Psychiatry, 176, 464-467. http://dx.doi.org/10.1192/bjp.176.5.464 Scuteri, A. (2008). Depression and cardiovascular risk: Does blood pressure play a role? Journal of Hypertension, 26, 1738-1739. http://dx.doi.org/10.1097/HJH.0b013e32830dfff7 Scuteri, A., Spalletta, G., Cangelosi, M., Gianni, W., Assisi, A., Bran- cati, A. M., & Volpe, M. (2009). Decreased nocturnal systolic blood pressure fall in older subjects with depression. Aging Clinical and Experimental Research, 21, 292-297. http://dx.doi.org/10.1007/BF03324918 Siennicki-Lantz, A., Andre-Petersson, L., & Elmstahl, S. 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