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Spontaneous lipid peroxidation and production of hydrogen peroxide and superoxide in human spermatozoa. Superoxide dismutase as major enzyme protectant against oxygen toxicity
Human spermatozoa liquid peroxidation superoxide production hydrogen peroxide production
2009/2/23
Spontaneous lipid peroxidation in washed human spermatozoa was induced by aerobic incubation at 32 C and measured by malonaldehyde production; loss of motility during the incubation was determined s...
Bicarbonate-dependent lipid ordering and protein aggregation are part of the nongenomic action of progesterone on capacitated spermatozoa
Capacitation acrosome reaction membrane bicuculline
2009/2/18
The nongenomic action of progesterone (P) on capacitated sperm in mediating acrosomal exocytosis operates through transmembrane signal transduction involving increased intracellular calcium ions and...
Lipid peroxidation and human sperm motility: protective role of vitamin E
Asthenospermia lipid peroxidation vitamin E human spermatozoa
2009/2/16
Asthenospermia is the main factor of male infertility among patients consulting the Asir Infertility Center in Abha, Saudi Arabia. Lipid peroxidation occurring in both the seminal plasma and sperm...
Effect of sperm lipid peroxidation on fertilization
Spermatozoa sperm hyperactivation zona pellucida sperm capacitation reactive oxygen species
2009/2/16
This study was aimed at determining, with homologous mouse gametes, whether a level of membrane lipid peroxidation insufficient to affect sperm motility parameters can alter sperm fertilizing pote...
Lipid peroxidation and antioxidant enzyme activities in the rat testis after cigarette smoke inhalation or administration of polychlorinated biphenyls or polychlorinated naphthalenes
Reactive oxygen oxidative stress superoxide dismutase catalase cigarette smoking environmental chemicals
2009/2/12
Lipid peroxidation products and antioxidant enzyme activities were studied in the rat testis following exposures to cigarette smoke, polychlorinated biphenyls (PCBs), or polychlorinated naphthalen...
Correlation between the rate of lipid peroxidation and cellular maturity as measured by creatine kinase activity in human spermatozoa
Spermatogenesis sperm development oligospermia male fertility
2009/2/12
We have demonstrated previously that creatine kinase (CK) activity is a measure of cellular maturity and fertilizing potential in human spermatozoa. In the present work we have examined whether th...
Effect of cryoprotective additives and cryopreservation protocol on sperm membrane lipid
Sperm PAF PTX cryoprotection lipid peroxidation
2009/2/12
Sperm membrane damage during cryopreservation reduces the recovery of motile sperm. The present study investigates changes in sperm motility and membrane lipid peroxidation (LPO) in response to two ...
Comparison of effects of 0.5 and 3.0 Gy X-irradiation on lipid peroxidation and antioxidant enzyme function in rat testis and liver
0.5 and 3.0 Gy X-irradiation lipid peroxidation antioxidant enzyme function rat testis
2009/2/12
The prooxidant effect of X-irradiation on rat testis and liver tissue was studied with doses of 0.5 and 3.0 Gy; the latter dose kills the proliferating spermatogonia and causes a maturation-depletio...
Evidence that membrane stress contributes more than lipid peroxidation to sublethal cryodamage in cryopreserved human sperm: glycerol and other polyols as sole cryoprotectant
Human sperm cryopreservation cryoprotectant sublethal cryodamage lipid peroxidation membrane stress
2009/2/12
One effect of cryopreservation on human sperm is sublethal cryodamage, in which cell viability post-thaw is lost more rapidly at later times than in fresh cells. We hypothesized two modes of suble...
Evidence for increased lipid peroxidative damage and loss of superoxide dismutase activity as a mode of sublethal cryodamage to human sperm during cryopreservation
superoxide dismutase activity sublethal cryodamage human sperm cryopreservation
2009/2/10
Cryopreservation of human sperm, now generally required in donor insemination programs, adversely affects the sperm in terms of standard sperm evaluation parameters and fertilizing ability. The fr...
Lipid transfer activity in human follicular fluid：relation to human sperm capacitation
sperm capacitation acrosome reaction lipid transfer cholesteryl ester
2009/2/6
A potentially important event during sperm capacitation is the loss of sperm membrane cholesterol. Although the exact mechanisms mediating this loss are not known, albumin and high density lipopr...
The effect of reactive oxygen species on equine sperm motility, viability, acrosomal integrity, mitochondrial membrane potential, and membrane lipid peroxidation
reactive oxygen species equine sperm motility viability
2008/12/25
The objective of this study was to examine the influence of reactive oxygen species (ROS), generated through the use of the xanthine (X)-xanthine oxidase (XO) system, on equine sperm motility, via...
Spermicidal Activity of Bacterial Lipopolysaccharide Is Only Partly Due to Lipid A
Apoptosis human sperm Kdo
2008/12/24
We have previously shown that co-incubation of Chlamydia trachomatis lipopolysaccharide (LPS) leads to premature sperm death by an apoptosis-like mechanism. It was always assumed that lipid A is the...
Changes in Membrane Lipid Order With Capacitation in Rhesus Macaque（Macaca mulatta）Spermatozoa
Primate sperm merocyanine 540 annexin-V tyrosine phosphorylation
2008/12/24
Lipophilic fluorescent dye merocyanine 540 is believed to stain cell membranes with increasing affinity as the lipid components become more disordered and has been associated with changes in m...
Trisialoganglioside GT1b Prevents Increase in Sperm Membrane Molecular Ordering Induced by In Vitro Lipid Peroxidation
Membrane rigidity gangliosides spermatozoa
2008/12/23
The effect of various types of gangliosides, the sialic acid-containing glycosphingolipids, on human sperm membrane during lipid peroxidation induced by Fe2+/ascorbate ions was investigated. The m...