TY - JOUR
T1 - New insight in beryllium toxicity excluding exposure to beryllium-containing dust
T2 - Accumulation patterns, target organs, and elimination
AU - Drobyshev, Evgenii
AU - Kybarskaya, Larisa
AU - Dagaev, Sergey
AU - Solovyev, Nikolay
N1 - Publisher Copyright:
© Springer-Verlag GmbH Germany, part of Springer Nature 2019.
PY - 2019/4
Y1 - 2019/4
N2 - There is much contradiction between different experimental studies on beryllium (Be) toxicity. The majority of studies focus on occupational pathologies, caused by the exposure to Be dust. However, Be pollution may affect wide population groups through other exposure routes. The discrepancies between experimental studies may be attributed to the lack of adequate Be toxicity model since conventional administration routes are hampered by high acidity and low solubility of Be compounds. This study was aimed to develop a novel way to implement Be toxicity avoiding side effects, related to high acidity or low solubility of Be salts. Intraperitoneal injection of Be–glycine composition (containing BeSO4, glycine, purified water, pH adjusted to 5.5 with NaOH) was tested in the dose range 238–7622 µmol Be kg−1 (body weight, b/w) in full-grown Wistar male rats. The model provided reliable uptake of Be from the peritoneum into general circulation for at least 48 h. LD50 was found to be 687 µmol Be kg−1 (b/w). The established LD50 value differed from previous data on gastrointestinal, intramuscular or intravenous administration of Be compounds. The liver was found to act as a primary elimination route for Be and related to the highest Be content in the animal. However, it had no signs of morphological damage, which was observed only in the testes (deterioration of germinal epithelium). At the same time, the lungs, stated as a primary target tissue for Be in the models of chronic beryllium disease, did not show strong Be accumulation nor morphological changes. Survived animals showed behavioral changes, including increased motor activity and aggressive reactions in some cases, and complete spasticity in other. The obtained data show the applicability of the established modeling protocol and testified for the independence of chronic beryllium disease on Be2+ ion toxicity per se.
AB - There is much contradiction between different experimental studies on beryllium (Be) toxicity. The majority of studies focus on occupational pathologies, caused by the exposure to Be dust. However, Be pollution may affect wide population groups through other exposure routes. The discrepancies between experimental studies may be attributed to the lack of adequate Be toxicity model since conventional administration routes are hampered by high acidity and low solubility of Be compounds. This study was aimed to develop a novel way to implement Be toxicity avoiding side effects, related to high acidity or low solubility of Be salts. Intraperitoneal injection of Be–glycine composition (containing BeSO4, glycine, purified water, pH adjusted to 5.5 with NaOH) was tested in the dose range 238–7622 µmol Be kg−1 (body weight, b/w) in full-grown Wistar male rats. The model provided reliable uptake of Be from the peritoneum into general circulation for at least 48 h. LD50 was found to be 687 µmol Be kg−1 (b/w). The established LD50 value differed from previous data on gastrointestinal, intramuscular or intravenous administration of Be compounds. The liver was found to act as a primary elimination route for Be and related to the highest Be content in the animal. However, it had no signs of morphological damage, which was observed only in the testes (deterioration of germinal epithelium). At the same time, the lungs, stated as a primary target tissue for Be in the models of chronic beryllium disease, did not show strong Be accumulation nor morphological changes. Survived animals showed behavioral changes, including increased motor activity and aggressive reactions in some cases, and complete spasticity in other. The obtained data show the applicability of the established modeling protocol and testified for the independence of chronic beryllium disease on Be2+ ion toxicity per se.
KW - Beryllium
KW - Excretion
KW - Intraperitoneal administration
KW - Rats
KW - Testicle
UR - http://www.scopus.com/inward/record.url?scp=85063206659&partnerID=8YFLogxK
U2 - 10.1007/s00204-019-02432-7
DO - 10.1007/s00204-019-02432-7
M3 - Article
C2 - 30891623
AN - SCOPUS:85063206659
SN - 0340-5761
VL - 93
SP - 859
EP - 869
JO - Archives of Toxicology
JF - Archives of Toxicology
IS - 4
ER -