RESUMEN
The expression of retinoid-acid-related orphan receptor α (RORα) was evaluated at the mRNA level using real-time polymerase chain reaction (qRT-PCR), and its expression localization was determined by in situ hybridization of adult Inner Mongolian cashmere goats at different times of the year. In situ hybridization demonstrated that RORαwas expressed in secondary hair follicles of the hair shaft, inner root sheath, outer root sheath, medulla, and other parts that are target organs of the RORαreceptor gene. qRT-PCR results showed that there was no significant difference in the RORa mRNA abundance in February, April, August, and October (P > 0.05), and the only difference occurred in December relative to February, August, and October (P < 0.05). This difference revealed that melatonin possibly promotes cashmere growth through the nuclear receptor RORα. This study provides a good foundation for future studies on the relationship between the melatonin receptor and cashmere growth; in addition, it provides new insights for increased cashmere production and quality.
Asunto(s)
Cabras/genética , Folículo Piloso/metabolismo , Miembro 1 del Grupo F de la Subfamilia 1 de Receptores Nucleares/genética , Animales , Secuencia de Bases , Bovinos , ADN Complementario/genética , Regulación de la Expresión Génica , Hibridación in Situ , Masculino , Datos de Secuencia Molecular , Miembro 1 del Grupo F de la Subfamilia 1 de Receptores Nucleares/metabolismo , ARN Mensajero/genética , ARN Mensajero/metabolismo , Reacción en Cadena en Tiempo Real de la Polimerasa , Alineación de SecuenciaRESUMEN
Extracellular recording method was used to examine the effect of thyrotropin-releasing hormone (TRH) on 71 unit discharges of pain-excited neurons (PEN) in mesencephalic reticular formation (MRF) in 58 rats. Intracerebroventricular (icv) injection of TRH (10 micrograms/10 micrograms) produced significant decrease of pain discharge rate of PEN. TRH potentiated the inhibitory effect of electroacupuncture (EA) on nociceptive discharges when application of EA at bilateral "Zusanli" was coupled with icv injection of TRH. Both of these inhibiting effects of TRH were completely offset or strikingly decreased by icv preinjection of the cholinergic M-receptor blocker atropine. The results mentioned above and the mechanism of the inhibitory effect of TRH on pain discharges were discussed in this paper.