PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “Macaca”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 55 records · Page 3Linked to original sources
PubMed1979

Characteristics of the menstrual cycle in nonhuman primates. I. Similarities and dissimilarities between Macaca fascicularis and Macaca arctoides.

Comparative studies of reproductive characteristics were carried out on a colony of Macaca fascicularis and M. arctoides. Seasonal differences were not significant between species, and conceptions occurred throughout the year. The occurrence of short cycles ('luteal phase defect') was found in 2.9% of all M. fascicularis cycles and 1.5% of all M. arctoides cycles. Long cycles (40-50 days) were found in 4.0% of all M. fascicularis cycles and 3.5% of all M. arctoides cycles. Gestation lengths averaged 172.4 and 165.3 days, respectively, for M. arctoides and M. fascicularis. Ovulation in M. fascicularis occurred at a day of ovulation/cycle length ratio of 0.48 +/- 0.08 compared with 0.48 +/- 0.09 for M. mulatta data previously published.

Animals↗
PubMed1975

[Dopamine of the caudate nucleus in Perodictious potto, Macaca mulatta and Macaca fascicularis].

The dopamine, dopac and tyrosinehydroxylase contents of the caudate nucleus in the prosimian Perodicticus potto and in the simii Macaca mulatta and M. fascicularis have been estimated. The results do not support the hypothesis according to which the sluggishness of the potto is somehow related to a low dopamine content of part of the extrapyramidal system as found in the Parkinson-syndrome.

Animals↗
PubMed1985

[Experimental research on the preparation of dentin-pulp tissue of teeth exposed to CO2 laser beams in dogs and macaques (Macaca mulatta and Macaca fascicularis].

Traumatic inflammation due to application of CO2 laser radiation (lambda = 10.6 microns) on the dentin and on pulp of 342 teeth of 8 dogs (Beagle) and of 6 monkeys (Macaca sp. mulatta et fascicularis) stimulate in dentino-pulpal tissue morphological phenomenon, studied after 5 days, 1 and 3 months by microscopy and microradiography. The dentin exposed to a density of energy of: 2 X 10(3) J/cm2 shows a burn, a rarefaction and a cellular degeneration, followed by a neoformation of calcified dentin, of about 300 microns thick in 3 months, due to the excitation of odontoblasts or produced by pulpal cells functioning before. A density of energy of 10(3) J/cm2 order applied to the pulp beads to its partial necrosis, to various inflammatory aspects (vascular, cellular, tissular) and to a quasi-constant regeneration of by a neo-dentin bridge of 200 micron at 1 month. This method seems able to allow the analysis of cell activity (start, activation, blocking).

Animals↗
PubMed1977

Hemoglobin Izu (Macaca): beta83 (EF 7) Gly leads to Cys. A new hemoglobin variant found in the Japanese monkey (Macaca fuscata).

Recently, Ishimoto, Kuwata and Shotake reported a polymerizing hemoglobin found in Japanese monkey (Macaca fuscata) (J. Anthropol. Soc. Nippon 83, 233-243 (1975)). They separated the variant hemoglobin by gel filtration and from finger print results and from the fact that beta-mercaptoethanol dissociates the polymer deduced the substitution of an amino acid(s) by cysteine in the betaT10 peptide. We have purified the variant hemoglobin by ion-exchange chromatography using carboxymethyl cellulose after the protection of the reactive thiol groups with cystamine, and purified the betaT10 peptide and demonstrated that the usual glycine at beta 83 (EF 7) is substituted in the variant hemoglobin by cysteine.

Amino Acids↗
PubMed1983

Phase contrast microscopy of microbial aggregates in the gingival sulcus of Macaca mulatta. Subgingival plaque bacteria in macaca mulatta.

The objective of this study was to study the relationship of microbial aggregates in the subgingival crevice to changes in periodontal health in Macaca mulatta. The sample included 68 oral sites from 17 Rhesus monkeys of various ages. The periodontal health of each site was evaluated using Plaque and Gingival Indices and crevice depth measurement. The subgingival plaque samples were examined by phase contrast microscopy and recorded on 16 mm film. A Microbial Index was developed based on a qualitative estimate of the numbers of organisms, morphology of predominant organisms, and the presence or absence of motility. The Microbial Index was demonstrated to be simple in use and highly reproducible. The findings indicate that changes in the Microbial Index are consistent with tissue changes seen in the periodontal status in M. mulatta. From this preliminary study, the oral flora of adult M. mulatta appears to have sufficient similarities to human oral flora to be used as a microbial model for experimental periodontal disease research. Future studies to refine and confirm the validity of the Microbial Index are warranted. It may prove to be a useful tool to monitor the effect of various treatment modalities on the periodontal flora and to determine the presence or absence of active disease.

Animals↗
PubMed1991

Inhibin-like and gonadotropin-like immunoreactivity in pituitary cells of male monkeys (Macaca fascicularis, Macaca mulatta).

Inhibin-like immunoreactivity was detected by immunocytochemistry in the pituitaries of untreated male crab-eating macaques (cynomolgus monkey) and rhesus monkeys, in rhesus monkeys actively immunized against FSH, and in one orchidectomized crab-eating macaque. Localizations were performed by the immunogold-silver staining with 5-nm colloidal gold-conjugated second or third antibodies and by the alkaline phosphatase-anti-alkaline-phosphatase technique. Two different inhibin-specific antisera, raised against the alpha-subunit or the entire inhibin molecule, provided identical staining patterns. Positive label was confined to the pars distalis of the pituitary and occurred exclusively in the cytoplasm of morphologically different cell types throughout the pars distalis in all pituitaries. Staining was most prominent in clusters of chromophobic cells. The presence of inhibin-like activity in the pituitary of an orchidectomized monkey with undetectable serum inhibin levels suggests that inhibin is produced within the pituitary gland. Co-localization studies for the beta-subunits of the gonadotropic hormones revealed that on average 82% of the gonadotropes were bihormonal. Using the same protocol, co-localization of inhibin-like activity with gonadotropin-like immunoreactivity revealed only a small degree of common distribution (less than 15%). Inhibin-positive cells were frequently in close proximity to gonadotropic cells and, thus, paracrine effects of inhibin on gonadotropin-synthesizing cells are conceivable.

Animals↗
PubMed1980

Comparison of the predominant cultivable microflora in the dental plaque of Macaca mulatta (rhesus) and Macaca fascicularis (cynomolgus).

The predominant cultivable bacteria in the supra-gingival plaque of Old World monkeys were similar to those in human plaque. A significant interanimal species difference was observed in the absolute and relative concentration of specific microbial populations. Streptococcus mutans serotype c was found primarily in rhesus plaque and serotype e in cynomolgus plaque.

Actinomyces↗
PubMed1988

Use of ultrasound for early pregnancy detection in the rhesus and cynomolgus macaque (Macaca mulatta and Macaca fascicularis).

Diagnostic ultrasound provides an accurate method for the detection of early pregnancy and embryonic loss in macaque species. A developing gestational sac (GS) may be observed on gestational day (GD) 14-15 with positive identification on GD 16-18. Visualization of the yolk sac, embryo, and developing heart on GD 21-25 confirms pregnancy. Continuous observations during embryogenesis provide useful information when assessing the teratogenic potential of a variety of agents.

Animals↗
PubMed2004

Response to social challenge in young bonnet (Macaca radiata) and pigtail (Macaca nemestrina) macaques is related to early maternal experiences.

Previous experience affects how young primates respond to challenging social situations. The present retrospective study looked at one aspect of early experience, the quality of the mother-infant relationship, to determine its relationship to young bonnet and pigtail macaques' responses to two social challenges: temporary maternal separation at 5-6 months and permanent transfer to an unfamiliar peer group at 16-17 months. Relationship quality was measured quantitatively on 30 macaque mother-infant pairs with the Relationship Quality Index (RQI), the ratio of relative affiliation to relative agonism as previously applied to capuchin monkeys. Infants with high RQI values had amicable mother-infant relationships and infants with low RQI values had agonistic mother-infant relationships. Young monkeys with amicable and agonistic relationships showed consistent differences in behavior before, during, and after each social challenge, supporting the hypothesis that juveniles from amicable mother-infant relationships based on the RQI coped more effectively with social challenges than did juveniles from agonistic mother-infant relationships. Results suggest 1) characteristic amicability or agonism in early mother-offspring macaque relationships has the potential to influence offspring behavior in tense social contexts and 2) the RQI is useful as one of a coordinated suite of methods for studying the development of social skills.

Adaptation, Psychological↗
PubMed2006

Comparative studies with six extenders for sperm cryopreservation in the cynomolgus monkey (Macaca fascicularis) and rhesus monkey (Macaca mulatta).

Ejaculated spermatozoa from cynomolgus monkeys and rhesus monkeys were frozen in straws with six different extenders (TTE, DM, mDM, LG-DM, G-DM, and TCG) containing glycerol. Sperm motility and head membrane and acrosomal integrity were evaluated after freezing and thawing, and the cryoprotective effects were compared among the extenders and the two species studied. The results showed that sperm motility and motility recovery with the six extenders were comparable for the cynomolgus and rhesus monkeys. There was no significant difference in sperm motility and head membrane integrity among the six extenders in either the cynomolgus or rhesus monkeys (P>0.05). However, a slightly but statistically lower percentage of acrosomal integrity was found with TCG in both species compared to the other extenders (P<0.05). These findings demonstrate that TTE, DM, mDM, LG-DM, G-DM, and TCG are equally suitable extenders for the cryopreservation of spermatozoa from cynomolgus and rhesus monkeys.

Acrosome↗
PubMed1982

The luteinizing hormone-releasing hormone pathways in rhesus (Macaca mulatta) and pigtailed (Macaca nemestrina) monkeys: new observations on thick, unembedded sections.

Immunocytochemical procedures on thick, unembedded tissue sections were used to study the localization of LHRH neurons and fibers in the diencephalon and mesencephalon of rhesus and pigtailed macaques. Cell bodies were visualized in large numbers. Much of their dendritic arborization was also filled with reaction product. Cell bodies were present in the preoptic area, the periventricular hypothalamic zone from the level of the anterior hypothalamus to the premammillary nuclei, the infundibular nucleus, supraoptic nucleus, several septal nuclei, the nervus terminalis, and the amygdala. The localization of LHRH cells in several of these areas represents new observations. LHRH axons were observed to innervate the portal vessels in the median eminence, the organum vasculosum of the lamina terminalis, the median eminence, the organum vasculosum of the lamina terminalis, the medial mammillary nuclei, the epithalamus, and the amygdala. These observations are discussed in relationship to the regulation of gonadotropin secretion in the primate.

Amygdala↗
PubMed1975

Teratologic evaluation of imipramine hydrochloride in bonnet (Macaca radiata) and rhesus monkeys (Macaca mulatta).

Imipramine hydrochloride was administered orally twice daily to 18 bonnet and 3 rhesus monkeys between days 23 and 45 of pregnancy for 1-3 or 18-22 days at 1, 2, and 10 times the recommended human dose. No teratologic changes were observed, although signs of maternal toxicity occurred at the high dose level, and the abortion rate was higher than in controls.

Abortifacient Agents↗
PubMed1987

Embryotoxicity of sex steroidal hormone combinations in nonhuman primates: I. Norethisterone acetate + ethinylestradiol and progesterone + estradiol benzoate (Macaca mulatta, Macaca fascicularis, and Papio cynocephalus).

Two sex steroid hormone combinations which have been used clinically as tests for detection of early pregnancy were examined for embryotoxic effects in macaques and baboons. Norethisterone acetate and ethinyl estradiol (NEA + EE) were orally administered to rhesus and cynomolgus monkeys and baboons at dosages ranging from one to 1,000 times the human dose equivalent (HDE) during days 20-50 of pregnancy. Progesterone and estradiol benzoate (P + EB) were delivered by two to six intramuscular injections to rhesus and cynomolgus monkeys between gestational days 20 and 35 at 0.1-25 X HDE. Fetuses were examined following cesarean section at 100 +/- 2 days (NEA + EE) or at term (P + EB). The results showed increased embryolethality over controls at 100-1,000 X HDE (NEA + EE) and at 10 and 25 X HDE (P + EB). Besides growth retardation, isolated cases of minor nongenital malformations were observed only in cynomolgus monkeys following treatment with both hormone combinations mainly at embryolethal dose levels and were considered spontaneous in nature. Virilization of female cynomolgus fetuses following NEA + EE treatment was manifested as two cases of clitoral enlargement in the 300 X HDE group and two cases of increased anogenital distance with reduced vaginal opening in the 1,000 X HDE group. The highest dose of NEA + EE was also maternally toxic, as two maternal deaths occurred at the end of the treatment period. One dead female cynomolgus fetus exposed to P + EB (10 X HDE) also exhibited masculinized external genitalia.(ABSTRACT TRUNCATED AT 250 WORDS)

Abnormalities, Drug-Induced↗
PubMed1991

Vasoactive intestinal polypeptide nerve fibers in human and monkey (Macaca fascicularis and Macaca mulatta) kidneys.

Nerve fibers immunoreactive for vasoactive intestinal polypeptide (VIP) were demonstrated for the first time by the indirect immunofluorescence technique in human and monkey kidneys. VIP-immunoreactive nerve fibers showing varicosities were observed in the adventitia of arcuate arteries and their branches. The density of VIP-immunoreactive nerve fibers decreased from the juxtamedullary region to the cortex. Occasionally a VIP-immunoreactive varicose nerve fiber was observed near the vascular pole of a glomerulus, but no direct innervation of afferent or efferent arterioles in either monkey or human kidney was found. The distribution of VIP-immunoreactive nerve fibers in the monkey and human kidneys was similar to that reported in other species, with less density. The functional role of VIP in the innervation of the kidney is not known, but various suggestions have been made regarding the possible involvement of VIP on vasodilation of selective intrarenal blood vessels, renin secretion, and/or effects on tubules. While none of these questions were established at this time they would appear to be logical areas for further study.

Animals↗
PubMed1986

Sulphoxidation of S-carboxymethyl-L-cysteine in the rhesus monkey (Macaca mulatta), cynomologus monkey (Macaca fascicularis), African green monkey (Cercopithecus aethiops) and the marmoset (Callithrix jacchus).

The metabolic pathways giving rise to the urinary metabolites of S-carboxymethyl-L-cysteine have been identified for the rhesus, cynomologus, African green and marmoset species of monkey. The formation of a sulphoxide metabolite from the sulphide precursor is a reaction important in these species. The metabolic profile displayed by the marmoset was distinct from the three Old World species, with the rhesus and cynomologus being similar to man.

Animals↗