Akumangalisi ukuthi ukubhema ngesikhathi sokukhulelwa kuyingozi empilweni yengane: i-nicotine, kodwa futhi nezinye izingxenye zingawela umgoqo we-placenta futhi zifinyelele ku-fetus, okungaholela ezinkingeni zokukhula ngokwesibonelo. A isifundo esisha ibonisa ukuthi ukubhema ngesikhathi sokukhulelwa kungaba nemiphumela ekusebenzeni kwama-neurons wengane ezayo.
I-NICOTINE, UKUSHINTSHWA KOMSEBENZI WOFUZO LWE-FETUS!
Esibelethweni sokuchayeka ku-nicotine kwandisa ingozi yokuvela kwezingozi zokukhulelwa, ukukhubazeka kwe-intrauterine ukukhula, ngaphambi kwesikhathi, isifo sokufa kwezingane ezisanda kuzalwa. Lokhu kuchayeka kungaholela nasekuntulekeni kwengqondo nokuziphatha.
Ucwaningo olusha olwenziwe ithimba locwaningo lwe-biomedical Inyuvesi yaseHouston Akay Lab ibonisa ukuthi ukubhema ngesikhathi sokukhulelwa kuholela ekusebenzeni kabi kwama-dopaminergic neurons ezinganeni ezisanda kuzalwa. Ama-neurons e-Dopaminergic ama-neurons akhulula into ethile, i-dopamine, ebizwa nangokuthi i-molecule yenjabulo: empeleni, ibandakanyeka ezinhlelweni zokuvuza nasezimweni zokulutha.
Ngokutadisha okurekhodiwe kwe-dopaminergic kanye ne-non-dopaminergic neurons etholakala endaweni ethile yobuchopho bezingane ezisanda kuzalwa (indawo ye-ventral tegmental noma i-VTA), abacwaningi bakwazi ukubona ukuthi ukuchayeka ku-nicotine kwaholela ekwandeni kokukhululwa kwe-dopamine. .
umphumela : Izingane zingaba imilutha ye-nicotine. Ososayensi banethemba lokuthi bazokwazi ukuqonda ukuthi lezi zindlela zishintshwa kanjani ukuze kuhlinzekwe ukwelashwa okusebenzayo kwalo mlutha.
Umthombo : Neufmois.fr/
