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The specific role that prolactin plays in lactational infertility, as distinct from other suckling or metabolic cues, remains unresolved. Here, deletion of the prolactin receptor (Prlr) from forebrain neurons or arcuate kisspeptin neurons resulted in failure to maintain normal lactation-induced suppression of estrous cycles. Kisspeptin immunoreactivity and pulsatile LH secretion were increased in these mice, even in the presence of ongoing suckling stimulation and lactation.
View Article and Find Full Text PDFKisspeptin and Neurokinin B: roles in reproductive health.
Physiol Rev
January 2025
Department of Investigative Medicine, Imperial College London, Hammersmith Hospital, London, United Kingdom.
Kisspeptin and neurokinin B (NKB) play a key role in several physiological processes including in puberty, adult reproductive function including the menstrual cycle, as well as mediating the symptoms of menopause. Infundibular kisspeptin neurons, which co-express NKB, regulate the activity of gonadotropin releasing hormone (GnRH) neurons, and thus the physiological pulsatile secretion of GnRH from the hypothalamus. Outside of their hypothalamic reproductive roles, these peptides are implicated in several physiological functions including sexual behavior and attraction, placental function, and bone health.
View Article and Find Full Text PDFLong-acting growth hormones: innovations in treatment and guidance on patient selection in pediatric growth hormone deficiency.
Ann Pediatr Endocrinol Metab
January 2025
Department of Medicine, Surgery and Health Science, University of Trieste, Trieste, Italy.
Long-acting growth hormones (LAGHs) represent a significant advancement in the treatment of pediatric growth hormone deficiency (GHD), offering an alternative to daily recombinant human growth hormone (rhGH) therapy. Traditional rhGH treatments, while effective, require daily injections, often leading to poor adherence due to the frequency of dosing, injection pain, and difficulties with storage and travel. In contrast, LAGHs, such as somatrogon, somapacitan, and lonapegsomatropin, are designed for once-weekly administration, improving patient compliance and quality of life.
View Article and Find Full Text PDFA Typical Bezold Abscess With an Atypical Aetiology.
Cureus
December 2024
Department of Otolaryngology, Head and Neck Surgery, General Hospital of Athens "Georgios Gennimatas", Athens, GRC.
Objective: This study aims to present a case of temporal bone (TBP) paraganglioma with an insidious clinical presentation, deviating significantly from the typical hearing loss and pulsatile tinnitus pattern.
Methods: A 70-year-old lady presented to the emergency department with a five-day history of right progressive later cervical swelling extending to the mastoid region and chronic worsening purulent otorrhea. The clinical and radiological findings confirmed the presence of a chronic middle ear process complicated by a Bezold abscess.
STIPS algorithm enables tracking labyrinthine patterns and reveals distinct rhythmic dynamics of actin microridges.
Phys Biol
January 2025
Department of Biological Sciences, Tata Institute of Fundamental Research Department of Biological Sciences, Tata Institute of Fundamental Research, Homi Bhabha road, Navy Nagar, Colaba, Mumbai-400005, INDIA, Mumbai, 400005, INDIA.
Tracking and motion analyses of semi-flexible biopolymer networks from time-lapse microscopy images are important tools that enable quantitative measurements to unravel the dynamic and mechanical properties of biopolymers in living tissues, crucial for understanding their organization and function. Biopolymer networks are challenging to track due to continuous stochastic transitions, such as merges and splits, which cause local neighbourhood rearrangements over short time and length scales. To address this, we propose the STIPS algorithm (Spatio Temporal Information on Pixel Subsets) to track these events by creating pixel subsets that link trajectories across frames.
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