Abstract:
:An attempt was made to determine the role of metabolic acidification of pericellular medium in regulating cell proliferation. A method of measuring the pH of pericellular medium at a distance exceeding a Debye radius of 5-10 A from the cell surface (pHp) was developed. The values of pHp and pH measured in the medium at a distance of greater than 1 cm from cells (pHm) were found to differ, depending on the cell population density. At a density of at least 7 X 10(5) cells/cm2 (maximum saturation density) and at pHm 7.4-7.6, pHp reached a value of approximately 6.5. It was found that pHm 6.5 was unfavorable for cell proliferation in sparse cultures, where pHm and pHp were equal. Based on these findings, low pHp as revealed in the present work using dense cultures at optimal pHm can be considered to be a limiting factor for cell multiplication.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Akatov VS,Lezhnev EI,Vexler AM,Kublik LNdoi
10.1016/0014-4827(85)90188-0subject
Has Abstractpub_date
1985-10-01 00:00:00pages
412-8issue
2eissn
0014-4827issn
1090-2422journal_volume
160pub_type
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