2.Experimental Studies of Concentration of Organophosphorous Pesticides in the Living Body
Masanori Takahashi ; Hiroko Kasakawa ; Kohzoh Inokuchi ; Shiro Wakai ; Keiko Sasaki ; Ken Sone ; Teiji Iwami ; Masamichi Kimura
Journal of the Japanese Association of Rural Medicine 1980;29(2):99-108
In the previous report, we concluded that chances are very slim for Salithion and Sumithion to concentrate in rabbits as these organophosphorous compounds are excreted quickly. This conclusion was inferentially drawn from the results of measurements of concentration of Salithion and Sumithion residues in the blood after experimental exposures of rabbits to the pesticides.
In the present report, we will discuss the same toxicological problem based on our findings in a series of experiments using rabbits with hepatic disturbances induced by carbon tetrachloride (CCl4).
Rabbits were divided into three groups. One consists of rabbits having light hepatic disorder. They were subcutaneously injected with 0.1ml/kg of 20% CCl4 olive oil for three days consecutively. Under the second group come rabbits with moderate liver disturbance caused by the injection of 0.3 ml/kg of 20% CCl4 olive oil. The injection was also made for three days. The remaining group is the control group.
These rabbits were administered orally with 5mg/kg and 20mg/kg of Smithion for three days running.
The examination covered (1) Sumithion residue level in the blood, (2) PNMC level in urine, (3) hepatic function (ChE, GOT, GPT, BSP, Al-P, BUN), (4) urinalysis and (5) histopathological examination of the liver and the kidney. The results of these tests were studied in comparison with those of the control group.
The following is a summary of our conclusion:
1) In the control group, Sumithion residues in the blood disappeared quickly, and could not be detected 72 hours after administration.
2) As far as the disappearance of Sumithion and the excretion of PNMC are concerned, there was no significant difference between the control and the light and moderate liver disturbance groups of rabbits.
3) In the rabbits with CCl4-induced liver disturbances, it was noted that the administration of Sumithion impeded serum and red-cell ChE activities to a remarkable extent, and delayed the recovery of the liver function.
4) However, the liver disturbance did not deteriorate. The histological observation of the liver and the kidney did not reveal any abnormality due to the administration of Sumithion, either.
3.Effects of Information Provided by Pharmacists on Pharmacotherapy
Mariko Kawana ; Yuka Kobori ; Masahito Nakazaki ; Masanori Suzuki ; Junko Nagai ; Tadanori Sasaki
Japanese Journal of Drug Informatics 2013;15(3):105-110
Objective: There are only a few studies evaluating the effects of drug information services on pharmacotherapy. We, therefore, studied the effects of providing drug information such as the effectiveness and safety of aliskiren on its pharmacotherapeutic efficacy by comparing before versus after drug information provision.
Methods: Pharmacists provided drug information such as the effectiveness and safety of aliskiren coadministered with either ACE-I (angiotensin converting enzyme inhibitor) or ARB (angiotensin receptor blocker) to physicians and other healthcare professionals. We compared the number of patients for whom aliskiren was prescribed, the proportion of diabetic patients taking both aliskiren and ACE-I (or ARB), the proportion of patients with low eGFR (estimated glomerular filtration rate), and the proportion of patients with hyperkalemia and related conditions, before versus after providing the drug information to the healthcare professionals.
Results: The number of patients for whom aliskiren was prescribed decreased. The proportion of patients taking both aliskiren and ACE-I (or ARB) decreased significantly after providing the drug information (p=0.007). The proportion of diabetic patients taking both aliskiren and ACE-I (or ARB), the proportion of patients with low eGFR, and the proportion of patients with hyperkalemia also decreased, after providing the drug information.
Conclusion: This study showed the drug information service to be clinically beneficial, achieving better pharmacotherapy. Pharmacists should evaluate and provide information on the effectiveness and safety of drugs announced by authorities in a timely manner to achieve optimal patient care.
4.Palonosetron versus granisetron in combination with aprepitant for the prevention of chemotherapy-induced nausea and vomiting in patients with gynecologic cancer.
Satoe FUJIWARA ; Yoshito TERAI ; Satoshi TSUNETOH ; Hiroshi SASAKI ; Masanori KANEMURA ; Masahide OHMICHI
Journal of Gynecologic Oncology 2015;26(4):311-319
OBJECTIVE: There is no research regarding the appropriate antiemetic agents for female patients, especially those receiving moderately emetogenic chemotherapy (MEC). We evaluated the antiemetic efficacy of a combination of 5-HT3 receptor with/without aprepitant in patients with gynecological cancer treated with the TC (paclitaxel and carboplatin) regimen of MEC. METHODS: We enrolled 38 patients diagnosed with gynecologic cancer and scheduled to receive the TC regimen. The patients were randomly assigned to receive a 5-HT3 receptor antagonist, either palonosetron in the first cycle followed by granisetron in the second cycle or vice versa. In the third cycle, all patients received a combination of the 5-HT3 receptor and dexamethasone with/without aprepitant. RESULTS: When three drugs were administered, palonosetron consistently produced an equivalent complete response (CR) rate to granisetron in the acute phase (89.5% vs. 86.8%, p=0.87) and delayed phase (60.5% vs. 65.8%, p=0.79). With regard to the change in dietary intake, palonosetron exhibited similar efficacy to granisetron in the acute phase (92.1% vs. 89.4%, p=0.19) and delayed phase (65.7% vs. 68.4%, p=0.14). However, in the delayed phase, the addition of aprepitant therapy with a 5-HT3 receptor antagonist and dexamethasone produced a higher CR rate than a 5-HT3 receptor antagonist with dexamethasone (93.3% vs. 47.8%, p<0.001) and allowed the patients to maintain a higher level of dietary intake (93.3% vs. 56.5%, p<0.001). CONCLUSION: The addition of aprepitant therapy was more effective than the control therapy of a 5-HT3 receptor antagonist, and dexamethasone in gynecological cancer patients treated with the TC regimen.
Adult
;
Aged
;
Antiemetics/*administration & dosage
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Antineoplastic Combined Chemotherapy Protocols/adverse effects
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Carboplatin/administration & dosage/adverse effects
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Cross-Over Studies
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Diet
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Drug Administration Schedule
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Female
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Genital Neoplasms, Female/*drug therapy
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Granisetron/administration & dosage
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Humans
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Isoquinolines/administration & dosage
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Middle Aged
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Morpholines/administration & dosage
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Nausea/chemically induced/*prevention & control
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Paclitaxel/administration & dosage/adverse effects
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Quinuclidines/administration & dosage
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Serotonin 5-HT3 Receptor Antagonists
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Vomiting/chemically induced/*prevention & control
5.Application of low-crystalline carbonate apatite granules in 2-stage sinus floor augmentation: a prospective clinical trial and histomorphometric evaluation
Takayuki NAKAGAWA ; Keiko KUDOH ; Naoyuki FUKUDA ; Shohei KASUGAI ; Noriko TACHIKAWA ; Kiyoshi KOYANO ; Yasuyuki MATSUSHITA ; Masanori SASAKI ; Kunio ISHIKAWA ; Youji MIYAMOTO
Journal of Periodontal & Implant Science 2019;49(6):382-396
PURPOSE: The purpose of this study was to elucidate the efficacy and safety of carbonate apatite (CO₃Ap) granules in 2-stage sinus floor augmentation through the radiographic and histomorphometric assessment of bone biopsy specimens.METHODS: Two-stage sinus floor augmentation was performed on 13 patients with a total of 17 implants. Radiographic assessment using panoramic radiographs was performed immediately after augmentation and was also performed 2 additional times, at 7±2 months and 18±2 months post-augmentation, respectively. Bone biopsy specimens taken from planned implant placement sites underwent micro-computed tomography, after which histological sections were prepared.RESULTS: Postoperative healing of the sinus floor augmentation was uneventful in all cases. The mean preoperative residual bone height was 3.5±1.3 mm, and this was increased to 13.3±1.7 mm by augmentation with the CO₃Ap granules. The mean height of the augmented site had decreased to 10.7±1.9 mm by 7±2 months after augmentation; however, implants with lengths in the range of 6.5 to 11.5 mm could still be placed. The mean height of the augmented site had decreased to 9.6±1.4 mm by 18±2 months post-augmentation. No implant failure or complications were observed. Few inflammatory cells or foreign body giant cells were observed in the bone biopsy specimens. Although there were individual differences in the amount of new bone detected, new bone was observed to be in direct contact with the CO₃Ap granules in all cases, without an intermediate layer of fibrous tissue. The amounts of bone and residual CO₃Ap were 33.8%±15.1% and 15.3%±11.9%, respectively.CONCLUSIONS: In this first demonstration, low-crystalline CO₃Ap granules showed excellent biocompatibility, and bone biopsy showed them to be replaced with bone in humans. CO₃Ap granules are a useful and safe bone substitute for two-stage sinus floor augmentation.
Apatites
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Biopsy
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Bone Substitutes
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Carbon
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Dental Implants
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Giant Cells, Foreign-Body
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Humans
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Individuality
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Prospective Studies
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Sinus Floor Augmentation
6.Current Use of Sedatives for Terminal Cancer Patients near Death Receiving Home Palliative Care, and Influence on Home Care Period
Kotaro HASHIMOTO ; Kazuki SATO ; Mitsuharu SASAKI ; Hiroaki TAKABAYASHI ; Masanori KAWAHARA ; Masao SUZUKI
Palliative Care Research 2019;14(3):187-192
Objective: This study investigated the association between use of sedatives in terminal cancer patients near death who were receiving home care and the home care period. Methods: We conducted a retrospective review of the medical records for 1032 cancer patients who received home palliative care from 17 specialized home care clinics between June and November 2013. We checked the use of sedatives within 48 hours before death at home, and we compared the home care period between patients with and without sedation. Results: The sedatives used were diazepam (n, %: 100, 52%), flunitrazepam (29, 15%), bromazepam (27, 14%), midazolam (26, 13%), and phenobarbital (20, 10%). The median home care period (median [quartiles]) was 26 [13, 63] days and 25 [10, 64] days (Adj p=0.79) for the patients with and without sedatives, respectively. Conclusion: Among terminal cancer patients near death receiving home care, 24% were administered sedatives, with more than half of those patients receiving diazepam. There was no association between use of sedatives and the home care period.