The study looked at a protein called kisspeptin (Kiss1) and its receptor GPR54 in breast cancer. It found that in estrogen‑positive tumors, higher levels of these molecules were linked to a worse outcome after tamoxifen treatment, suggesting they might signal resistance to the drug, but this doesn’t give any direct tips for everyday health or performance improvement.
In a lab study using cells taken from the front part of cow pituitary glands, the short peptide kisspeptin-10 was found to boost the release of growth hormone (GH) and, in older calves, prolactin (PRL) at relatively high concentrations. Younger calf cells responded to lower doses for GH, while the youngest cells showed no change in prolactin. These effects were seen only in a dish, not in living animals.
Kauffman. Alexander S AS; Park. Jin Ho JH; McPhie-Lalmansingh. Anika A AA; Gottsch. Michelle L ML; B...
The study shows that the kisspeptin receptor (GPR54) isn’t needed for adult sexual behavior if hormones are replaced, but it is important during early brain development for making male‑typical brain and nerve features. In mice lacking this receptor, adult males act like females in some brain and nerve traits, even though they can still mate when given hormones.
This paper reviews where kisspeptin, a hormone that helps start puberty and control reproductive hormones, is made in the brain. It mainly lives in two brain spots (the anteroventral periventricular nucleus and the arcuate nucleus) and talks to other hormone‑producing cells. The review also notes kisspeptin shows up in other hypothalamic areas, hinting it might do more than just reproductive regulation, but those roles aren’t clear yet.
Pinilla. L L; Castellano. J M JM; Romero. M M; Tena-Sempere. M M; Gaytán. F F; Aguilar. E E
In a rat model of high blood pressure, delayed puberty was linked to the ovaries not working properly, not to problems with the kisspeptin (KiSS-1) or GnRH hormone systems. The kisspeptin system looked normal, but the ovaries produced far less hormone and responded poorly to stimulation.
Scientists discovered that a fish called medaka has brain cells that make the hormone kisspeptin, which helps control reproduction. These cells are found in two brain areas, and the number of cells in one area changes with sex and estrogen levels, showing that the fish’s kisspeptin system is sensitive to hormones.
Kauffman. Alexander S AS; Clifton. Donald K DK; Steiner. Robert A RA
This paper reviews how the hormone kisspeptin and its receptor GPR54 control the brain signals that start and regulate reproduction. It explains that kisspeptin helps trigger puberty, controls how sex hormones feedback to the brain, and even influences seasonal breeding in animals.
The study shows that a brain chemical called kisspeptin works with estrogen to trigger the hormone surge that leads to ovulation. Kisspeptin neurons respond to estrogen, fire up GnRH neurons, and cause a big release of LH, which is needed for the egg to be released.
The study found that higher levels of the protein metastin (kisspeptin-10) and its receptor GPR54 in pancreatic tumors are linked to smaller tumors, lower recurrence, and longer survival after surgery. Patients with high blood levels of metastin after removal of the tumor all survived during the follow‑up period.
Castellano. J M JM; Navarro. V M VM; Fernández-Fernández. R R; Nogueiras. R R; Tovar. S S;...
In undernourished pre‑pubertal rats, a lack of food lowers the brain's kisspeptin (KiSS‑1) levels but raises its receptor (GPR54). Giving kisspeptin‑10 makes the animals' hormone system more responsive, and long‑term treatment can kick‑start puberty in many of them, though it doesn’t change how much they eat.
Gaytán. F F; Gaytán. M M; Castellano. J M JM; Romero. M M; Roa. J J; Aparicio. B B; Garrid...
Researchers found that the hormone‑like peptide kisspeptin (made from the KiSS‑1 gene) is naturally present in human and monkey ovaries, especially in cells that help eggs grow and release. When rats were given drugs that block COX‑2 (a common target of NSAIDs like ibuprofen), their ovaries made far less kisspeptin and they had trouble ovulating. This effect could be fixed by giving back a prostaglandin (PGE2).
Khan. Md Sakirul Islam MS; Ohkubo. Takeshi T; Masuda. Naoto N; Tachibana. Tetsuya T; Ueda. Hiroshi H
In baby chickens, injecting the peptide kisspeptin-10 (called metastin) straight into the brain makes them eat more. This appetite‑boosting effect disappears when a drug that blocks mu‑opioid receptors is given, but not when drugs that block other opioid receptors are used. The result suggests kisspein‑10 works through mu‑opioid pathways in birds.
Dova. L L; Golfinopoulos. V V; Pentheroudakis. G G; Georgiou. I I; Pavlidis. N N
Researchers looked at a gene called KiSS1, which makes the peptide kisspeptin, in 50 cancers where the original tumor site is unknown. They found only one tumor with a tiny mutation in KiSS1, meaning most of these cancers have a normal KiSS1 gene. So, the spread of these cancers isn’t likely caused by changes in KiSS1, but probably by other genetic or epigenetic factors.
Researchers looked at genetic variations in the KISS1 gene, which makes the kisspeptin peptide, to see if any are linked to early puberty in Chinese girls. They found one new change in the protein that might be related, but there’s no solid proof yet and no other variants showed a connection.
Jiang. Ying Y; Berk. Michael M; Singh. Lisam Shanjukumar LS; Tan. Haiyan H; Yin. Lihong L; Powell. C...
The study shows that a protein called KiSS1 can slow down the spread of ovarian cancer cells in lab experiments and mice, mainly by blocking a specific enzyme (PKCα). However, it doesn’t give any guidance on how to use kisspeptin‑10 as a supplement or treatment for everyday health goals.
The review explains that the KISS1 gene and its peptide partner can help stop melanoma cancer cells from spreading and might be useful as a test or future treatment, but it doesn’t give any tips you can use now for health, fitness, or longevity.
The article explains that the hormone kisspeptin and its receptor are crucial for starting puberty and controlling reproductive hormones. It mainly reviews animal and human studies showing that kisspeptin triggers the release of hormones that tell the gonads to produce sex hormones, and that lacking kisspeptin leads to infertility.
Felip. Alicia A; Zanuy. Silvia S; Pineda. Rafael R; Pinilla. Leonor L; Carrillo. Manuel M; Tena-Semp...
Scientists discovered that fish and other non‑placental animals have two kisspeptin genes (KiSS‑1 and KiSS‑2). The KiSS‑2 peptide is a stronger trigger for reproductive hormones in fish, but it works poorly in rats and is missing from mammals like us. For humans, only the KiSS‑1 (kisspeptin‑10) version matters.
Navenot. Jean-Marc JM; Wang. Zixuan Z; Chopin. Michael M; Fujii. Nobutaka N; Peiper. Stephen C SC
Kisspeptin-10, a short piece of a protein made by the KiSS-1 gene, can turn on a cell receptor (GPR54) that blocks another receptor (CXCR4) from pulling cancer cells toward signals that help them spread. It does this without lowering the amount of CXCR4 on the cell surface, but by changing internal signaling pathways, especially reducing Akt activation while keeping ERK active.
Kisspeptin-10 is a tiny protein that tells the brain to release hormones that start puberty and control reproduction. It works by activating a receptor called GPR54, which then boosts the release of gonadotropin‑releasing hormone and downstream sex hormones. The review shows that higher kisspeptin activity is seen during puberty, and giving kisspeptin to young animals can jump‑start their reproductive system, while missing the receptor causes delayed or absent puberty.