[Iprolactin iyawunqanda umnqweno, kodwa inokubonwa “njengenomvuzo.”]
Ihomoni eyaziwa ngobisi lukamama ikwakhuthaza ubudlelwane phakathi kwabazali
Uphando lufumene indima yeprolactin, ihomoni evuselela ukuveliswa kobisi komama abancancisayo, kubudlelwane phakathi kwabazali.
Uphononongo luxhomekeke kuhlalutyo lwamahomoni omchamo osuka kwikotoni-phezulu tamarins, inkawu encinci, esengozini yokuphela yaseColombia. Bahlala kumaqela eentsapho ezinomfazi omnye apho bobabini abazali banceda ekunyamekeleni abaselula, nto leyo efana nabantu.
Uphononongo lufumene ikhonkco phakathi kwamanqanaba eprolactin kunye nomsebenzi wesondo kunye nokuthandana phakathi kwabantu abadala. Nangona le ibiyeyokuqala kwiprolactin, ibikhe yafunyanwa ngaphambili ioxytocin, ihomoni evuselela ukuzala kwaye inxulunyaniswe noluhlu lweemvakalelo ezonwabileyo.
Amanqanaba eprolactin ayephezulu phakathi kwezibini ezihlala zilala ngesondo kwaye zibambene kwaye ziphantsi phakathi komama abagqibile ukuncelisa, nangona iintsana zabo zihlala kufuphi.
Umbhali wokuqala uthi: “Ootata baxakeke kakhulu benyamekela abantwana, mhlawumbi babenalo nexesha elincinane lokuthandana kunye nokunxibelelana namaqabane abo. UCharles Snowdon, unjingalwazi ophumayo wezengqondo kwiYunivesithi yaseWisconsin-Madison. “Xa ujonga oomama ababeneprolactin esezantsi, baba neentlobano zesini kancinci namaqabane abo.”
Iziphumo, ezisanda kupapashwa kwijenali ye-Intanethi ye-PLoS One, zongeza kwinani elikhulayo lokuhambelana phakathi kwe-oxytocin kunye neprolactin.
"Imiba yokuziphatha yeprolactin ifumene uphononongo oluncinci kune-oxytocin," utshilo uSnowdon.
Ngokucacisa ngomfanekiso wemisebenzi yehomoni ekudibaneni kwezibini, isifundo sikhanyisa indima ebalulekileyo edlalwa ziihomoni kukuziphatha okunemivuzo okunxulumene nokuba nomfazi omnye.
Ukufunyaniswa malunga neminyaka engama-25 eyadlulayo ukuba i-oxytocin yayinendima ebalulekileyo ekudibaneni kwezibini “yayiyingcamango eyimpumelelo yokuba i-oxytocin yayingekokuba ngumzali kuphela, okanye iqhina likamama nosana, kodwa malunga nesibini esidibanisa abantu abadala,” utshilo uSnowdon. Ngoku sifumana into efanayo kwiprolactin, eyihomoni eneziphumo ezahlukeneyo zomzimba.
Ukufunyaniswa kolunye uphononongo lwamanqanaba aphezulu eprolactin phakathi kwamadoda akhathalela iintsana (ebantwini nakwezinye iiprimates) kwenza ukuba iprolactin ibonakale ngathi ibangela indlela yokuziphatha yobuzali.
Kodwa uSnowdon uthi yena kunye nombhali-mbhali uToni Ziegler we Wisconsin National Primate Research Centre kholelwa ukuba iprolactin inokuba sisiphumo somzali endaweni yoko. “Mhlawumbi ayisebenzi njengesixhobo sokuqhuba ukhathalelo lwabazali, kodwa isiphumo, umvuzo wokhathalelo lwabazali.”
Ingcamango yokuba iprolactin kunye ne-oxytocin inokubonelela ngembuyekezo yaqiniswa luphononongo lwaseJamani olufumene ukuqhuma kweehomoni zombini xa amadoda nabasetyhini befikelela kwi-orgasm ngelixa besenza uthando. "Oku kucebise kum ukuba iprolactin inokuthi, phakathi kwezinye izinto, isebenze njengendlela yokwabelana ngesondo," utshilo uSnowdon.
Kukho obunye ubungqina bokuba iprolactin inendima kwiisekethe zomvuzo, utshilo uSnowdon. "Iprolactin inqanda iikhemikhali ezivusayo kwinkqubo yethu ye-nervous, ukunciphisa umnqweno wethu."
Uphononongo olungaphazamisiyo lwenziwa kwikholoni ye-tamarin ehlala kwisebe lezengqondo le-UW-Madison. Kwi-2008, ikholoni yavalwa kwaye izilwanyana zatshintshelwa kwii-zoo, iindawo ezingcwele kunye nezinye iikholeji.
Ukwaziwa ukuba iihomoni ezimbini zidlala indima ehambelanayo ekudibaneni kwezibini zesini zombini kuluhlu lwezilwanyana ezanyisayo ngokuhambelana nezinye iihomoni kunye nokuziphatha kwabazali, utshilo uSnowdon. Kukho ukudibana okumangalisayo phakathi kweprolactin kunye neoxytocin. Kusengqiqweni ukucinga ukuba iihomoni ezifanayo kunye nemimandla yobuchopho iyabandakanyeka ekulawuleni indlela yokuziphatha ebaluleke kakhulu ukuze usinde njengomzali kunye nokudibana kwabantu ababini. Sifumanisa ukuba iqhina lomtshato elilungileyo lisisandulela sokunyanyekelwa kakuhle kootata ebantwini nasezinkawini.”
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