Monday, November 27, 2006

Melatonin, DHEA for SZ

In our Patient, TD presents itself as a long closure of the eye lids as if the Patient was asleep. If you engage the Patient in conversation you find the Patient awake and responding and when you discuss a topic the Patient is excited about, the Patient will open the eyes. Patient is aware that eyes are closed and describes them as being clamped shut.
--gjh

"A common side effect of antipsychotic medications used to treat schizophrenia is a condition called tardive dyskinesia, a movement disorder of the mouth characterized by a constant chewing motion and darting action of the tongue. In a study(1.) of 22 people with schizophrenia and tardive dyskinesia caused by antipsychotic medications, those who took melatonin supplements had significantly reduced mouth movements compared to those who did not take the supplements."

(2.) "antipsychotics produce their effect by reducing DHEA." "DHEA naturally begins to decline around age twenty to twenty-five, and this probably occurs earlier in schizophrenics. In addition to this decline, interference with the availability of DHEA may occur because of another adrenal hormone, cortisol, and, beginning at puberty, the hormone, testosterone."

"In my articles on evolution and sleep at this website, I connect the pineal hormone, melatonin, with DHEA. I suggest melatonin may be involved in producing receptors, chemical doorways, for DHEA. For DHEA to produce its growth promoting activities on neurons, it must have a pathway into the neuron. Melatonin stimulates these receptor at night. I think this pathway is reduced in schizophrenics, because nighttime melatonin is reduced in schizophrenia (Biological Psychiatry 1989, 25: 500). Proper amounts of melatonin are necessary for slow wave sleep to occur; the deepest stage of slow wave sleep is stage 4. Lack of stage 4 sleep is documented in schizophrenia. (sic) ...others think reduced melatonin may be involved in some forms of schizophrenia, however, the investigators do not mention DHEA."

"The drugs used to control schizophrenia, I suggest, actually exert their effects by stimulating DHEA production. That is, "...antipsychotic potencies of most neuroleptic drugs closely correspond to their prolactin-releasing potencies at low doses..." (Biological Psychiatry 1990, 27: 1204). Therefore, it may actually be DHEA that ameliorates schizophrenia upon antipsychotic drug administration. Schizophrenia is thought to result from dopaminergic over-activity; essentially all antipsychotic drugs block postsynaptic dopamine receptors. This increases prolactin release. The dopaminergic agonist, bromocriptine, often used as an anti-prolactin agent, produces hallucinations, delusions, and confused thinking when used in excess."

"Schizophrenia results from lack of cerebral hemisphere growth as a result of severe reductions in DHEA and melatonin during brain growth and development. It is triggered by events later in life that reduce DHEA availability and increase the negative effects of cortisol. I suggest treating schizophrenics with melatonin at night and DHEA during the day may help in some circumstances, depending on the level of damage done by prolonged cortisol exposure."

(3.)"Cortisol also inhibits hippocampal neurogenesis, but DHEA has a stimulatory effect. Cortisol can actually kill hippocampal neurons, and does so increasingly with aging and stress, but this effect can be reversed with melatonin and Insulin-like Growth Factor (IGF-1) [THE JOURNAL OF NEUROSCIENCE; Aberg,MA; 20(8):2896-2903 (2000)]."

Useful Links:
http://www.umm.edu/altmed/ConsSupplements/Melatonincs.html
http://www.anthropogeny.com/Schizophrenia.htm
http://www.benbest.com/nutrceut/melatonin.html
http://www.benbest.com/nutrceut/DHEA.html


(1.)Shamir E, Barak Y, Shalman I, Laudon M, Zisapel N, Tarrasch R, et al. Melatonin treatment for tardive dyskinesia: a double-blind, placebo-controlled, crossover study. Arch Gen Psych. 2001;58(11):1049-1052.

(2.)James Michael Howard - http://www.anthropogeny.com/Schizophrenia.htm

(3.) Chapter 3 -- Learning, Memory and Plasticity, by Ben Best
http://www.benbest.com/science/anatmind/anatmd3.html