Circadian characteristic of kidney excretory function influenced by nitrogen monoxide synthesis blockade under conditions of pineal gland normal with peculiarities of melatonin effect.

OBJECTIVE: The features of сhronorhythmic alterations of excretory renal function under the physiological conditions of the pineal gland (PG) under the influence of a blockade of synthesis of nitrogen monoxide (NO) and melatonin correction were investigated. The aim: Aim of our work was to investigate circadian characteristic of kidney excretory function influenced by nitrogen monoxide synthesis blockade under conditions of pineal gland normal with peguliarities of melatonin effect. PATIENTS AND METHODS: Materials and methods: The experiments were conducted on 72 mature non-linear albino male rats with their body mass 0,15-0,18 kg. The animals were kept under vivarium conditions at a stable temperature and air humidity fed on a standard dietary intake. RESULTS: Results and conclusions: Based on a series of studies, the blockade of NO synthesis and melatonin correction resulted in a decrease in the average daily urinary output and a decrease in the removal of potassium ions from urine, relative to control, during the observation period. Therefore, the clarification of the features of сhronorhythmic alterations of the excretory renal function under the physiological conditions of the PG under the influence of blockade of NO synthesis and melatonin correction is important for the knowledge of the mechanisms of occurrence and development of pathological conditions, which will enable to improve the early diagnosis, improve the treatment of renal pathology and timely preventative measures.

Peculiairities of the influence nitrogen monoxide synthesis blockade on circadian organization of kidney acid-regulating function under conditions of pineal gland hyperfunction.

OBJECTIVE: Introduction: In recent decades chronobiology - a science that studies the regularities of the functioning of the organism, especially biological rhythms is developing rapidly. Biorhythms are stable nonstopper lifetime fluctuations with individual amplitude-frequency characteristics. Kidneys are characterized by a clear time organization of functions too, however, the peculiarities of circadian organization and the mechanisms of the participation of intracellular messengers in particular nitrogen monoxide (NО) in biorhythmic regulation of renal functions, remain insufficiently studied The aim of our work was to investigate the peculiairities of the influence nitrogen monoxide synthesis blockade on circadian organization of kidney acid-regulating function under conditions of pineal gland hyperfunction. PATIENTS AND METHODS: Materials and methods: The experiments were conducted on 72 mature non-linear albino male rats with their body mass 0,15-0,18 kg. The animals were kept under vivarium conditions at a stable temperature and air humidity fed on a standard dietary intake. The control group included animals (n=36) kept under conditions of usual light regimen (12.00L:12.00D) during 7 days. The experimental group included animals (n=36) injected with N-nitro-L-arginine (L-NNA) in the dose of 20 mg/kg during 7 days under conditions of continuous absolute darkness (12.00D:12.00D). On the 8th day the animals were exposed to 5& water load with heated to room temperature water supplied and the parameters of the kidney acid-regulating function under conditions of forced diuresis were investigated. RESULTS: Results: The inhibition of the monoxide synthesis (NО) in conditions of pineal gland (PG) hyperfunction violated the structures of chronorhythms acid-regulating function of the kidneys. The decrease in urine pH at daytime intervals was due to a decrease in the level of hydrogen ion excretion during this period of the day. The introduction of the NО blocker against the background of the PG hyperfunction violated the structure of the acid esterification chronorhythms that are titrated. The maximum level of this indicator was recorded at 20.00 a.m. a day. The blockade of the synthesis NО on the background of the PG hyperfunction significantly reduced the level of excretion of ammonia. CONCLUSION: Conclusions: The maximum level of excretion was 12.00 a.m., bathyphase - at 24.00 a.m. The average daily level was 1.5 mcmol/100 mcl GF and was lower relative to the control animals and animals that were in the conditions of PG hyperfunction.