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Peritoneal dialysis method

a peritoneal dialysis and dialysis technology, applied in the field of peritoneal dialysis, can solve the problems of patients' death and achieve the effect of less peritoneal injuries

Inactive Publication Date: 2009-07-23
KOWA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]To solve the problem above, the present invention provides a peritoneal dialysate which causes less peritoneal injuries and can be employed in peritoneal dialysis continuously over a long period of time, and a peritoneal dialysis method using the dialysate.
[0006]The present inventors have focused on peritoneal mesothelial cells lining the peritoneum, and have searched for substances which are capable of preventing peritoneal mesothelial cell injuries caused by high sugar level, and have found that adenosine triphosphate (ATP) or a salt thereof has an effect of preventing peritoneal mesothelial cell injuries, that ATP or a salt thereof thus is useful for a preventive or therapeutic agent for peritoneal injuries, and that a peritoneal dialysate containing ATP or a salt thereof can be employed in peritoneal dialysis for a long period of time, thus completing the present invention.
[0016]According to the present invention, there can be obtained a peritoneal dialysate which is safe and which, after use in peritoneal dialysis for a long period of time, causes less peritoneal injuries.

Problems solved by technology

If left untreated, patients will eventually die.
However, when patients are treated with peritoneal dialysis for a long period of time, they may have a problem of possible functional disorder of the peritoneum, involving hardening of the peritoneum, or peritonitis.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033]Peritoneal mesothelial cells (HPMC) were preincubated for three hours in culture media (M199) containing ATP (0, 10, 100, and 1,000 μM). The cells were washed with an HPMC culture medium (saline buffer) and then incubated for eight hours in culture media (M199) containing glucose at three different levels (5.8 mM, 75 mM, and 140 mM). HPMC viability was obtained through cell counting (WST-1).

[0034]The results are shown in FIG. 1. When HPMC was preincubated with the culture media containing no ATP, the viability of the HPMC decreased as the glucose level increased, whereas when HPMC was preincubated with the culture media containing ATP, decrease in viability caused by high level glucose was significantly alleviated.

example 2

[0035]Instead of ATP, adenosine, which is a metabolite of ATP, was employed to study the effect of adenosine on decrease in HPMC viability caused by high level glucose.

[0036]The results are shown in FIG. 2. Adenosine exhibited no effect of alleviating decrease in HPMC viability, as shown in the case of ATP.

example 3

[0037]Prior to the step of preincubation with ATP-containing culture media in the procedure of Example 1, HPMC were preincubated for 30 minutes with each of the following selective ATP receptor antagonists: (1) Suramin (P2X, P2Y receptor antagonist; 10 μM), (2) Reactive Blue 2 (P2Y receptor antagonist; 30 μM), and (3) PPADS (P2X receptor antagonist; 10 μM). Thereafter, the test was performed as described in Example 1.

[0038]The results are shown in FIGS. 3, 4, and 5. When the HPMC was treated with ATP receptor antagonist, ATP exhibited no effect of alleviating reduction in HPMC viability.

[0039]The results obtained in Example 1 indicate that ATP has an effect of significantly preventing peritoneal mesothelial cell injuries caused by high glucose level. The results obtained in Examples 2 and 3 reveal that this effect of ATP is not attributed to an action of ATP serving as an energy source after being taken into the cells, but rather to a direct action of ATP exhibited by the mediation ...

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Abstract

A peritoneal dialysate containing adenosine triphosphate or a salt thereof, and a peritoneal dialysis method using the dialysate.The peritoneal dialysate is safe and causes less peritoneal injuries even when employed in peritoneal dialysis over a long period of time.

Description

TECHNICAL FIELD[0001]The present invention relates to a preventive or therapeutic agent for peritoneal injuries which may occur during peritoneal dialysis; to a peritoneal dialysate which is safe and causes less peritoneal injuries or other disorders; and to a peritoneal dialysis method using the peritoneal dialysate.BACKGROUND ART[0002]In an advanced stage of renal failure, body wastes cannot be removed sufficiently, and therefore, blood levels of uremia-related substances such as urea nitrogen (BUN), creatinine (Cr), phosphorus (P), and potassium (K) increase, to thereby induce a variety of symptoms. The symptoms include increased fatigue, shortness of breath, decreased urine volume, edema, loss of appetite, and in addition to these, hypertension, hyperkalemia, and anemia. If left untreated, patients will eventually die. Therefore, patients suffering from uremia must undergo hemodialysis, peritoneal dialysis, or renal transplantation.[0003]Of these three treatment approaches, peri...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K31/715A61P13/12A61K31/7052A61K31/7076A61K33/00A61K45/06A61M1/28A61P29/00
CPCA61K31/7052A61K31/7076A61K33/00A61K45/06A61M1/28A61M1/287A61P13/12A61P29/00A61P43/00A61P7/08A61K2300/00
Inventor KIRIBAYASHI, KEIYORIOKA, NORIAKI
Owner KOWA CO LTD
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