زمينه و هدف: انجماد يكي از تكنيكي رايج در باروري-ناباروري است، با توليد راديكالهاي فعال اكسيژن موجب آسيب سلول اسپرم و عملكرد آن ميشود. تشخيص سلامت و قدرت باروري اسپرم انجماد، ارزيابي ماركرهاي مختلف در مردان ناباروري است. در اين مطالعه، هدف ما بررسي تأثير بيوتين و اسيد فوليك بر حركت، حيات، شكل، تراكم كروماتين و تماميت غشا اسپرم انجماد و ذوب شده در مردان نورموزواسپرمي است.
مواد و روش ها: در اين مطالعهي تجربي، 30 نمونه نورموزواسپرمي جمعآوري شد. هر نمونه، شامل گروه تازه قبل از انجماد، گروههاي انجماد شده ي كنترل، بيوتين10 mM))، اسيدفوليك (50 nM) و تركيب بيوتين (10 mM) و اسيد فوليك (50 nM). اسپرمها به مدت دو هفته با تكنيك رايج انجماد در دماي 196- درجهي سانتيگراد انجام و سپس ذوب شدند. نمونه ها قبل و بعد از انجماد از لحاظ حركت با نرم افزار آناليز اسپرم computer-aided sperm analysis ارزيابي شد. حيات اسپرم با رنگ آميزي ائوزين-نگروزين، تراكم كروماتين با رنگ آميزي تولوييدين بلو (Toluidine blue) و تماميت غشا با hypo Osmotic swelling Test بررسي شدند.
يافته ها: قبل از انجماد حركت، حيات، شكل ، تراكم كروماتين، تماميت غشا اسپرم در همه گروهها بيشتر و اسپرمهاي بيحركت كمتر ديده شد (0/001
چكيده لاتين :
Background and aim: Cryopreservation is one of the common techniques in the management of
infertility, which can damage the sperm cell and its function by producing reactive oxygen
species. To determine health and fertility of cryopreserved sperm, we evaluated different markers
in infertile men. The aim of this study was to investigate the effect of biotin and folic acid on
motility, viablity, shape, chromatin density and membrane integrity of cryopreserved and thawed
sperm in normozoospermic men.
Materials and Method: In this experimental study, 30 samples were collected from
normozoospermic men. Every sample included fresh pre-cryopreservation group, cryopreserved
control groups, biotin (10 mM), folic acid (50 nM), and combination of biotin (10 mM) and folic
acid (50 nM) groups. Sperms were frozen for two weeks using the usual freezing technique at -
196 ° C and then thawed. Samples were evaluated for motility before and after freezing using
computer-aided sperm analysis software. We assessed sperm viability by eosin-negrosin staining,
chromatin density by toluidine blue staining and membrane integrity by hypo osmotic swelling
test.
Results: Before cryopreservation, motility, viability, chromatin density, sperm membrane
integrity were higher and the number of immotile sperms were lower in all groups (p <0.001).
Quality of chromatin was higher in the groups of folic acid, biotin + folic acid and biotin than in
the control group. Mean sperm viability was higher in the three above mentioned groups than in
the control group. We found higher sperm membrane integrity in the folic acid, biotin and
combination groups than in control group (p <0.001). After cryopreservation, a positive
correlation was found between sperm chromatin quality and membrane integrity.
Conclusion: Biotin and folic acid showed a protective effects on chromatin quality, membrane
integrity, viability of the sperms and played an important role in maintaining sperm parameters
after cryopreservation.