• Journal of Embryo Transfer
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• v.23 no.2
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• pp.109-114
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• 2008

This study examined pregnancy and fetal loss rates according to different estrus synchronization protocols and injection of gonadotropin releasing hormone (GnRH) after transfer of Korean Native Cattle embryos to Holstein recipients. In Experiment 1, recipients received no treatment (Control, n = 119); two injections of prostaglandin$F_{2{\alpha}}$ ($PGF_{2{\alpha}}$ ) 11 days apart (PGF group, n = 120); GnRH (day 0)-$PGF_{2{\alpha}}$ (day 7)-GnRH (day 9) (Ovsynch group, n = 120); and CIDR (day 0)-$PGF_{2{\alpha}}$ and CIDR removal (day 7)-GnRH (day 9) (CIDR group, n = 110). In Experiment 2, the control group was received no treatment of GnRH. The treatment groups were received GnRH at embryo transfer (ET) (day 0), 7 days later, 14 days later, ET and 7 days later, 7 and 14 days later, or ET, 7 and 14 days later. Recipients were assigned to treatment randomly and received two in vitro produced blastocysts. Pregnancy was diagnosed at day 60 by palpation per rectum. Fetal loss to term was determined by palpation every 90 days thereafter. In Experiment 1, the pregnancy rate in the CIDR group (59.1%) were higher than in the Control group (42.0%) (p<0.01); fetal loss rates were similar for all groups (12.0 to 18.5%). In Experiment 2, the pregnancy rate in Day 0+7+14 group was higher (60.2%) than the control (40.2%) (p<0.01) and resulted in a lower fetal loss (p<0.05) than the control (4.6 vs. 11.4%). There were no significant difference between other treatment and the control (p>0.05). These results show that pregnancy rates of bovine embryos can be enhanced by CIDR insertion or GnRH $3{\times}$ treatment. Additionally, fetal loss may be reduced with GnRH treatment after ET.

• Journal of Embryo Transfer
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• v.18 no.3
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• pp.187-193
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• 2003

Recently a protocol was developed that precisely synchronizes the time of ovulation in Hanwoo. Cows were treated with GnRH on Day 0, PGF$_2$$\alpha$ 7 d later, GnRH 2 d later, and then time-inseminated approximately 24 h after this second treatment with GnRH. Ovarian morphology was monitored cows by trans-rectal ultrasonography 6.5MHz linear transrectal probe(Sonovet - 600., Medison co. Korea) from 24 hr to 31 hrs after second GnRH injection. The result obtained summarized as follows - 1. Induced ovulation were 24 to 31hr after the second GnRH injection, but high induced ovulation was 28hr. 2. Conception rate with HML(High meat lin) and HIL(High milk lin) treatment were 48.1％(38/79) and 43.9％(40/91), respectively. 3. Conception rate of 1∼2 parity and 3∼4 parity was 44.3％ and 55％, respectively. 4. Conception rate of spring, autumn was more increased, 47.3％ than summer.

• Journal of International Academy of Physical Therapy Research
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• v.9 no.2
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• pp.1442-1446
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• 2018

The present study aimed to investigate the effects of kinematic taping therapy on menstrual distress, pain, and $prostaglandinF2{\alpha}$. The experimental subject was a 24 years old woman with the pain of over 5 points on the dysmenorrhea measurement test and no unusual reactions on the taping test. The menstrual distress was measured by the Menstrual Distress Questionnaire (MDQ), and the dysmenorrhea was measured by the Visual Analogue Scale (VAS) before and after the intervention. The prostaglandin $F2{\alpha}(PGF2{\alpha})$ was measured on the first day of menstruation before the intervention and 24 hours after the taping therapy by the blood test. The intervention of kinematic taping was conducted by the instructor of the International Kinematic Taping Academy, and the taping was applied to the lower abdomen and the waist. According to the difference of menstrual distress before and after the intervention, the menstrual distress turned out to be decreased to 96 points after the intervention from the 115 points before the intervention. The dysmenorrhea also reduced 3 points on the VAS from 7 points to 4 points before and after the intervention. The $PGF2{\alpha}$ decreased from $26pg/m{\ell}$ to $20pg/m{\ell}$ before and after the intervention. Besides, the $PGF2{\alpha}$ decreased from $26pg/m{\ell}$ to $20pg/m{\ell}$ before and after the intervention. Results suggest that kinematic taping therapy could be useful to reduce the menstrual distress, pain, and $PGF2{\alpha}$.

• Korean Journal of Veterinary Research
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• v.35 no.3
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• pp.603-613
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• 1995

Plasma progesterone($P_4$) assay has been introduced to apply to the differential diagnosis of reproductive disorders and the monitoring of responses of ovarian dysfunction to $PGF_2{\alpha}$ or GnRH treatment in the 204 postpartum and postinsemination subestrus dairy cows. 1. The incidence rate of reproductive disorders in 204 subestrus cows, diagnosed by palpation per rectum and plasma $P_4$ determination using 'Two sample test'(Day 0+Day 10) were as follows; silent heat or error of estrus detection 110(53.9%), persistent corpus luteum 26(12.7%), follicular cyst 16(7.8%), inactive ovary 12(5.9%), luteal cyst 11(5.4%), granulosa cell tumor of ovary 1(0.5%), fetal mummification 1(0.5%), endometritis 15(7.4%) and pyometra 12(5.9%), respectively. 2. After the $PGF_2{\alpha}$ treatment to the 76 cows with silent heat or error of estrus detection, persistent corpus luteum, or luteal cyst, plasma $P_4$ concentrations at day 3 post treatment using 'Two sample test'(Day 0+Day 3) remained low(<1.0ng/ml) in all 76 cows. Therefore all 76 cows responded positively to $PGF_2{\alpha}$ treatment. Seventeen cows with follicular cyst or inactive ovary were treated with GnRH. All 7 cows with follicular cyst and 4 cows with inactive ovary remained high($${\geq_-}1.0ng/ml$$) a plasma $P_4$ concentrations at day 12 post treatment using 'Two sample test'(Day 0+Day 12), but 6 cows with inactive ovary remained low(<1.0ng/ml) a plasma $P_4$ concentrations. Therefore all 7 cows with follicular cyst and 4 cows with inactive ovary responded positively, but 6 cows with inactive ovary responded negatively to GnRH treatment. 3. The mean days from treatment to first service, number of cows conceived on first service(%), mean number of services per conception, mean days from initial treatment to conception, and mean number of cows conceived by 100 days post treatment(%) were 5.0 and 26.2 days, 45(59.2%) and 6(35.3%) cows, 1.5 and 1.7 services, 13.6 and 22.6 days, and 62(81.6%) and 9(52.9%) cows in group of $PGF_2{\alpha}$ and GnRH treatment, respectively. These results indicated that plasma $P_4$ assay was practical as an aid to diagnosing reproductive disorders and to monitoring responses of ovarian dysfunction to $PGF_2{\alpha}$ and GnRH treatment in subestrus cows.

• The Korean Journal of Physiology and Pharmacology
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• v.2 no.6
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• pp.779-786
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• 1998

A reversed-phase high-performance liquid chromatogrphy (RP-HPLC) has been developed to analyze the metabolites of arachidonic acid based on the specificities of ultraviolet absorption of these various metabolites and is sensitive to the nanogram level. This procedure makes it possible to extract complex mixtures of eicosanoids efficiently with a single step and to analyze them simultaneously by RP-HPLC from biological samples using octadesylsilyl silica extraction column and $PGB_2$ as an internal standard. The cyclooxygenase products {prostaglandin $(PG)D_2,\;PGE_1,\;PGE_2,\;PGF_{1{\alpha}},\;PGF{2{\alpha}},\;6-keto-PGF_{1{\alpha}},$ and thromboxane $B_2(TXB_2)}$ and lipid peroxidation product, isoprostanes, of arachidonic acid were monitored by one isocratic HPLC system at 195 nm wavelength. The lipoxygenase products ${leukotriene(LT)B_4,\;LTC_4,\;LTD_4,$ and 5-hydroxyeicosatetraenoic acid (5-HETE), 12-HETE, 15-HETE} were measured by another isocratic HPLC system at 280 nm for LTs and 235 nm for HETEs. This method provides a simple and reliable way to extract and assess quantitatively the final arachidonic acid metabolites.

• Korean Journal of Animal Reproduction
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• v.23 no.4
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• pp.365-369
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• 1999

Interferon tau (IFN$\tau$), the pregnancy recognition signal in ruminants, suppresses transcription of the estrogen receptor (ER) gene in the endometrial luminal (LE) and superficial glandular epithelium (sGE) to prevent oxytocin receptor (OTR) expression and pulsatile release of luteolytic prostaglandin $F_{2{\alpha}}$ (PGF), Interferon regulatory factors one (IRF-l) and two (IRF-2) are transcription factors induced by IFN$\tau$ that activate and silence gene expression, respectively. Available results suggest that IFN$\tau$ acts directly on LE and sGE during pregnancy to induce sequentially IRF-l and then IRF-2 gene expression to silence transcription of ER and OTR genes, block the luteolytic mechanism to maintenance a functional corpus luteum (CL) and, signal maternal recognition of pregnancy. The theory for maternal recognition of pregnancy in pigs is that the uterine endometrium of cyclic gilts secretes PGF in an endocrine direction, toward the uterine vasculature for transport to the CL to exert its luteolytic effect. However, in pregnant pigs, estrogens secreted by the conceptuses are responsible, perhaps in concert with effects of prolactin and calcium, for exocrine secretion of PGF into the uterine lumen where it is sequestered to exert biological effects and / or be metabolized to prevent luteolysis.

• Proceedings of the KSAR Conference
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• 2001.03a
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• pp.84-84
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• 2001

한우 농가의 다두화 사육규모에 적합한 번식관리모델 제시 및 수태율 증진을 위한 발정제어 방법을 개발하고자 수행하였다. 1. 년중 번식구의 분만간격은 412.9일, 수태당종부횟수 1.76회에 반하여 계절번식 I구와 II구는 각각 370.4일과 1.51회, 376.5일과 1.48회로 나타났다. 2. 송아지 생산율에 있어서 년중번식구 78.2%(174/184), 계절번식 I구 71.7%(99/138)에 비해 계절번식 II구에서는 79.2%(172/217)로 효율이 다소 높았다. 3. 발정유기방법별 동기화율에 있어서 PGF$_2$$_{\alpha}$ 2회 투여법에서 68.1%(141/207), PRID 삽입법 71.42%(15/21), CIDR 삽입법 86.3%(33/38)에 비해 GnRH-PGF$_2$$_{\alpha}$-GnRH 처리법은 93.1%(216/232)로 효율이 가장 높았다. 4. 발정유기방법별 1회 수정수태율은 PGF$_2$$_{\alpha}$ 2회 투여법 55.1%(64/l16), PRID 삽입법 54.0%(20/37), CIDR 삽입법 58.6%(17/29), 일괄수태법 58.8%(60/102)로 나타났고, 수태율은 각각 75%(87/116), 81%(30/37), 89.6%(26/29), 91.1%(93/102)였다. 5. 일괄수태 처리후 수정시점에 따른 수태율은 최종 GnRH 투여후 16~20 시간구가 65.3%로 가장 좋았다.

• Archives of Pharmacal Research
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• v.13 no.2
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• pp.136-141
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• 1990

The vasorelaxant effects of KR-30075 in guinea-pig pulmonary, bovine coronary and renal arterial strips contracted by either$K^+$depolarization, phenylephrine, or prostaglandin $F_{2a}$($PGF_{2a}$) were evaluated. KR-30075 was more potent than imazodan as a vasorelaxant against $PGF_{2a}$-induced contractions in bovine coronary and renal arteries, whereas against$K^+$induced contractions KR-30075 was less potent than imazodan in guieapig pulmonary arteries and more potent in bovine coronary arteries. KR-30075 was more potent against contractions induced by phenylephrine or $PGF_{2a}$ than the contractions induced by $K^+$ This profile of activity for KR-30075 was similar to that of imazodan and dissimilar from the calcium entry blocking agent nifedipine. There was no vascular selectivity of KR-30075 between bovine coronary and renal arterial strip preparations. In conclusion, this study shows that KR-30075 represents the vasorelaxant effects on guinea-pig pulmonary, bovine coronary and renal arteries without specific vascular selectivity. The vasorelaxant profile of KR-30075, with different sources of vascular smooth muscle, is unlike that of calcium entry blocking agent and more similar to the profile of the agent that inhibit cyclic nucleotide phosphodiesterase.

• Reproductive and Developmental Biology
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• v.41 no.2
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• pp.25-31
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• 2017

Effective estrus detection and artificial insemination (AI) are necessary for profitable management of dairy herd. In current study, 45 crossbred lactating cows have been selected with the complaint of unobserved oestrus for more than sixty days postpartum. All cows had functional corpus luteum as examined by transrectal ultrasonography. Cows were treated with $PGF_2{\alpha}$ analogue and AI was performed with observed oestrus and then single dose of GnRH was administered. Similar synchronization protocol has been repeated after 14 days in cows that did not repose to first treatment. Remaining cows received additional $PGF_2{\alpha}$ after 14 days of second treatment and timed AI was performed following GnRH administration. Among 45 cows, 28.89% showed estrus after first treatment and 78.79% responded to second hormonal intervention. A higher conception rate (88.89% vs 26.66 and 72.72%) was observed in cows after triple administration of $PGF_2{\alpha}$ and timed AI. We noticed a significant differences in body condition score (BCS, 1~5 scale), postpartum period, and daily milk production between cows that either responded of non-responded following first and second hormonal treatment. In addition, there was a significant positive correlation between daily milk production and BCS, age and postpartum days, milk production and estrus/BCS, and milk production/BCS/estrus and conception rate. Depending upon the findings we conclude that hormonal intervention with $PGF_2{\alpha}$ and GnRH enhances postpartum ovarian cyclicity and help decreasing the days open of dairy herd. Therefore, this finding might provide an excellent guideline for target breeding system for profitable dairy herd management.

• Journal of Life Science
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• v.23 no.1
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• pp.137-142
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• 2013

Human adipose-derived mesenchymal stem cells (hMSCs) are highly useful for vascular regeneration of injured or inflamed tissue. Lipopolysaccharide (LPS) is a potent activator of macrophages and stimulates macrophages to release inflammatory cytokines. In the present study, we explored the role of LPS-activated macrophages in the differentiation of hMSCs to smooth muscle cells (SMCs). We demonstrated that conditioned medium from LPS-induced macrophages (LPS CM) stimulates differentiation of hMSCs to SMCs, as evidenced by increased expression of smooth muscle-specific markers, including alpha-smooth muscle actin (${\alpha}$-SMA), smooth muscle-myosin heavy chain, and calponin. LPS induced the secretion of $PGF2{\alpha}$ from macrophages, and $PGF2{\alpha}$ treatment stimulated expression levels of SMC-specific markers in hMSCs. Furthermore, small interfering RNA-mediated silencing of the $PGF2{\alpha}$ receptor inhibited LPS CM-stimulated ${\alpha}$-SMA expression. These results suggest that LPS-activated macrophages promote differentiation of hMSCs to SMCs through a $PGF2{\alpha}$-dependent mechanism.