In this study, the effect of prophylactic anti-inflammation on the development of smoke-induced emphysema was investigated. Young male guinea-pigs aged 1.5-2 months (weighing 198.3+/-26.9 g) were randomly divided into 4 groups: group A (cigarette smoke exposure only), group B (cigarette smoke exposure plus pentoxifylline-rich (PTX, 10 mg/d) forage feeding), group C (cigarette smoke exposure plus intermittent cortical steroid injection (Triamcinolone acetonide, 3 mg, i.m., every three weeks) and control group (group D: animals with sham smoke exposure, raised under the same conditions). Animals in group A, B and C were exposed to smoke of cigarettes for 1 to 1.5 h twice a day, 5 days a week. All animals were killed at the 16th week and followed by morphometrical analysis of the midsagittal sectioned lung slices. Smoke exposure of 16 weeks resulted in visible emphysematous development in Group A but not in Group B and C. It was evidenced by the indicator of air-space size, mean linear intercept (Lm): 120.6+/-16.0 microm in Group A; 89.8+/-9.2 microm in Group B and 102.4+/-17.7 microm in Group C. The average Lm in either group B or group C was shorter than that in Group A (ANOVA and Newman-Keuls test, F=8.80, P=0.0002) but comparable to that (94.8+/-13.2 microm) in group D (P>0.05). It is concluded that long-term prophylactic anti-inflammation inhibits pulmonary emphysema induced by cigarette smoking in the guinea pigs.
Anti-Inflammatory Agents/*pharmacology ; Pentoxifylline/pharmacology ; Pulmonary Emphysema/etiology ; Pulmonary Emphysema/pathology ; Pulmonary Emphysema/*prevention & control ; Random Allocation ; Smoking/*adverse effects ; Triamcinolone Acetonide/*pharmacology

In this study, the effect of prophylactic anti-inflammation on the development of smoke-induced emphysema was investigated. Young male guinea-pigs aged 1.5-2 months (weighing 198.3+/-26.9 g) were randomly divided into 4 groups: group A (cigarette smoke exposure only), group B (cigarette smoke exposure plus pentoxifylline-rich (PTX, 10 mg/d) forage feeding), group C (cigarette smoke exposure plus intermittent cortical steroid injection (Triamcinolone acetonide, 3 mg, i.m., every three weeks) and control group (group D: animals with sham smoke exposure, raised under the same conditions). Animals in group A, B and C were exposed to smoke of cigarettes for 1 to 1.5 h twice a day, 5 days a week. All animals were killed at the 16th week and followed by morphometrical analysis of the midsagittal sectioned lung slices. Smoke exposure of 16 weeks resulted in visible emphysematous development in Group A but not in Group B and C. It was evidenced by the indicator of air-space size, mean linear intercept (Lm): 120.6+/-16.0 microm in Group A; 89.8+/-9.2 microm in Group B and 102.4+/-17.7 microm in Group C. The average Lm in either group B or group C was shorter than that in Group A (ANOVA and Newman-Keuls test, F=8.80, P=0.0002) but comparable to that (94.8+/-13.2 microm) in group D (P>0.05). It is concluded that long-term prophylactic anti-inflammation inhibits pulmonary emphysema induced by cigarette smoking in the guinea pigs.
Animals ; Anti-Inflammatory Agents ; pharmacology ; Guinea Pigs ; Male ; Pentoxifylline ; pharmacology ; Pulmonary Emphysema ; etiology ; pathology ; prevention & control ; Random Allocation ; Smoking ; adverse effects ; Triamcinolone Acetonide ; pharmacology

No abstract available.
Animals ; Anoxia/*drug therapy ; Diabetes Mellitus, Experimental/*complications ; Diabetic Nephropathies/*drug therapy ; Kidney Tubules/*drug effects ; Male ; Pentoxifylline/*pharmacology ; Phosphodiesterase Inhibitors/*pharmacology

No abstract available.
Animals ; Anoxia/*drug therapy ; Diabetes Mellitus, Experimental/*complications ; Diabetic Nephropathies/*drug therapy ; Kidney Tubules/*drug effects ; Male ; Pentoxifylline/*pharmacology ; Phosphodiesterase Inhibitors/*pharmacology

A 33-year-old male receiving dorsal penile nerve block (DPNB) for circumcision exhibited a postoperative ischemic change over the glans penis. The event occurred nearly 24 hours after the procedure. The patient was treated with intravenous pentoxifyllin and hyperbaric oxygenation. Total reverse of the ischemia was observed. The complications associated with circumcision and DPNB were reviewed and discussed.
Adult ; Circumcision, Male ; adverse effects ; Humans ; Infection ; etiology ; pathology ; Ischemia ; etiology ; pathology ; Male ; Nerve Block ; adverse effects ; Penis ; blood supply ; pathology ; Pentoxifylline ; pharmacology ; Vasodilator Agents ; pharmacology

OBJECTIVETo investigate the effects of pentoxifylline on rats and mice with learning and memory dysfunctions.

METHODSMorris water maze test was used to observe the effects of pentoxifylline on learning and memory of naturally aging rats, and jumping stand test was performed to examine its effects in promoting the learning and memory functions in mice with scopolamine- and ethanol-induced memory dysfunctions.

RESULTSIn aging rats, pentoxifylline at high, moderate and low doses all significantly reduced the latency of platform finding in the place navigation test (P<0.01 or P<0.05 ), and increased the quadrant searching frequency in the spatial probe test (P<0.05). Pentoxifylline at the 3 doses significantly increased the latency of electrification (P<0.01 or P<0.05) and decreased the times of error (P<0.05) of the mice as compared with scopolamine- treated group. Pentoxifylline also improved ethanol-induced memory dysfunction in the mice, but the changes in the performance of the mice were not statistically significant.

CONCLUSIONPentoxifylline can improve the learning and memory abilities of rats and mice.

Aging ; Animals ; Behavior, Animal ; drug effects ; Ethanol ; Maze Learning ; drug effects ; Memory ; drug effects ; Memory Disorders ; chemically induced ; Mice ; Pentoxifylline ; pharmacology ; Rats ; Rats, Sprague-Dawley ; Scopolamine Hydrobromide

OBJECTIVETo investigate the influence of high-voltage electrical burn (HEB) on the aggregation and adhesion of platelet and leukocyte in rats and the interventional effect of pentoxifylline (PTX).

METHODSOne hundred and eighty SD rats were divided into control, electrical burn (EB), and pentoxifylline treatment (PT) groups according to the random number table, with 60 rats in each group. (1) Ten rats were taken from each group at 15 minutes before injury for the observation of the microcirculatory perfusion of chest skin with Laser Doppler Perfusion Imager (LDPI), and the number of leukocyte adherent to mesenteric venule with Bradford Variable Projection Microscope (BVPM). Serum was collected from heart blood to determine the contents of platelet activating factor (PAF), thromboxane B2 (TXB2), prostacyclin (PGI2), P-selectin, E-selectin and L-selectin by double-antibody sandwich enzyme-linked immunosorbent assay. The ratio of TXB2 to PGI2 was calculated therefrom. (2) Model of HEB was reproduced in the remaining 50 rats of EB group and that of PT group with voltage regulator and experimental transformer (the electrical current applied to the left forelimb and exited from the right hind limb). The remaining 50 rats of control group were sham injured with the same devices without electric current. Within 2 minutes post injury (PIM), rats in control group and EB group were intraperitoneally injected with 2 mL isotonic saline, while rats in PT group were intraperitoneally injected with 2 mL pentoxifylline (50 mg/mL). At PIM 5 and 1, 2, 4, 8 hour(s) post injury (PIH), 10 rats of every group were randomly chosen at each time point for the observation of the microcirculatory perfusion of chest skin and the number of leukocytes adherent to mesenteric venule through the same method as used above, and the levels of the related factors of aggregation and adhesion of platelets and leukocytes were determined, and then the relative ratio was calculated. Data were processed with the analysis of variance of factorial design and LSD test.

RESULTSThe contents of PAF, TXB2, PGI2, P-selectin, E-selectin, L-selectin, and the ratio of TXB2 to PGI2, as well as the number of adhered leukocyte in EB group were higher, while the microcirculatory perfusion value was lower than those of control group, with F values from 854.20 to 8156.52, P values all below 0.01. The microcirculatory perfusion value and PGI2 content of PT group were higher, while the contents or number of other indexes were lower than those of EB group, with F values from 33.18 to 1033.99, P values all below 0.01. Only the data within EB group and PT group were comparable. The contents of PAF, TXB2, PGI2, P-selectin, E-selectin, L-selectin, and the ratio of TXB2 to PGI2, as well as the number of adhered leukocyte in EB group and PT group at each time point were significantly higher than those at 15 minutes before injury, while the microcirculation perfusion value was significantly lower than that at 15 minutes before injury (P values all below 0.001), with the exception of the ratio of TXB2 to PGI2 in PT group and E-selectin in EB group and PT group at PIM 5. The contents of PAF, TXB2, and E-selectin and the ratio of TXB2 to PGI2 in EB group peaked at PIH 4, and they were respectively (9.3 ± 0.9) ng/mL, (14.31 ± 0.65) nmol/mL, (271.2 ± 18.4) ng/mL and 4.62 ± 0.26. The contents of PGI2 and P-selectin, and the number of adhered leukocyte in EB group peaked at PIH 8, and they were respectively (3.98 ± 0.24) nmol/mL, (514 ± 24) ng/mL, and (25.50 ± 4.14) per 100 µm venule. The content of L-selectin peaked at PIH 2 [(876 ± 54) ng/mL]. The microcirculatory perfusion value was lowest at PIM 5 [(1.17 ± 0.10) V].

CONCLUSIONSHEB can increase the contents of PAF, TXB2, PGI2, P-selectin, E-selectin, L-selectin, the ratio of TXB2 to PGI2, and the number of adhered leukocyte, as well as decrease the skin microcirculatory perfusion value. PTX can inhibit the aggregation and adhesion of platelets and leukocytes through increasing the content of PGI2 and decreasing contents of other factors mentioned above, thus alleviating the microcirculatory dysfunction after HEB.

Animals ; Blood Platelets ; drug effects ; Burns, Electric ; blood ; physiopathology ; Leukocytes ; drug effects ; physiology ; Male ; Pentoxifylline ; pharmacology ; Platelet Aggregation ; drug effects ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo investigate the effect of pentoxifylline on one-lung ventilation injury in rabbits.

METHODSTwenty rabbit models of one-lung ventilation by intrabronchial intubation after tracheotomy were randomly allocated in control group (with one-lung ventilation) and experiment group (with one-lung ventilation and intravenous pentoxifylline administration). One-lung ventilation was maintained for 3 h in both groups using the volume-control mode (tidal volume of 8 ml/kg at the frequency of 30 per min). Arterial blood samples were taken after anesthesia and at 3 h of one-lung ventilation for arterial blood gas analysis to obtain the oxygenation index. At the end of the experiment, the pulmonary wet/dry ratio (W/D), tumor necrosis factor-alpha (TNF-alpha), NO, malondialdehyde (MDA) and superoxide dismutase (SOD) contents in bronchoalveolar lavage fluid (BALF) were measured and the histological appearance of the lung tissue was observed.

RESULTSThe oxygenation index was significantly higher (P<0.05), W/D ratio lower (P<0.05), and contents of TNF-alpha, NO and MAD in the BALF lower in the experimental group than in the control group (P<0.05). The activity of SOD increased significantly in the experimental group as compared with the control group (P<0.01), and the rabbits in the experimental group showed milder pathological changes.

CONCLUSIONIntravenous pentoxifylline may improve pulmonary ventilation function and alleviate pulmonary injury, thus offering protection against pulmonary injury after one-lung ventilation.

Acute Lung Injury ; etiology ; prevention & control ; Animals ; Continuous Positive Airway Pressure ; methods ; Female ; Intubation, Intratracheal ; Male ; Pentoxifylline ; pharmacology ; Pulmonary Ventilation ; Rabbits ; Respiration, Artificial ; adverse effects ; methods

OBJECTIVETo investigate the protective effect of pentoxifylline on spermatogenesis following testicular torsion/detorsion in rats.

METHODSHealthy male Sprague-Dawley rats (n = 24) were divided into three groups randomly, each comprising 8 rats. In Group I, rats underwent a sham operation. In Group II and III, animals were submitted to unilateral 720 degrees testicular torsion, then detorsion in two hours. Infusion of isotonic saline and pentoxifylline into tail vein was initiated 15 minutes prior to relief of torsion in Group II and III respectively. Twenty four hours later, testes were examined for evidence of germ cell apoptosis by the flow cytometry and the level of total antioxidant capability (T-AOC) and malondialdehyde (MDA) by spectrophotometry.

RESULTSCompared with that of group II, the number of apoptotic germ cell and the level of MDA decreased remarkably in Group III, but T-AOC increased significantly (P <0.01).

CONCLUSIONPentoxifylline provided significant rescue of testicular function after acute experimental torsion.

Animals ; Apoptosis ; drug effects ; Flow Cytometry ; Germ Cells ; drug effects ; pathology ; Male ; Malondialdehyde ; metabolism ; Pentoxifylline ; pharmacology ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Spermatic Cord Torsion ; drug therapy ; metabolism ; pathology ; Spermatogenesis ; drug effects ; Vasodilator Agents ; pharmacology

PURPOSE: Limited studies have shown antifibrotic effects of pentoxifylline, captopril, simvastatin, and tamoxifen. No comparisons are available of the effects of these drugs on prevention of renal and bladder changes in partial urethral obstruction (PUO). MATERIALS AND METHODS: The rats were divided into six groups (n=7). The sham-operated rats (group I) only underwent laparotomy and did not receive any treatments. The PUO groups (group II-VI) received normal saline (PUO+NS), pentoxifylline (100 mg/kg/d; PUO+PEN), captopril (35 mg/kg/d; PUO+CAP), simvastatin (15 mg/kg/d; PUO+SIM), or tamoxifen (10 mg/kg/d; PUO+TAM) by gavage for 28 days. Then, the volume and/or length of the kidney components (tubules, vessels, and fibrous tissue) and the bladder components (epithelial and muscular layers, fibrous tissue, fibroblast and fibrocyte number) were quantitatively evaluated on the microscopic sections by use of stereological techniques. RESULTS: The volume of renal and bladder fibrosis was significantly ameliorated in the PUO+PEN group, followed by the PUO+CAP, PUO+SIM, and PUO+TAM groups. Also, the volume and length of the renal tubules and vessels and bladder layers were more significantly protected in the PUO+PEN group, followed by the PUO+CAP, PUO+SIM, and PUO+TAM groups. CONCLUSIONS: Treatment of PUO with PEN was more effective in the prevention of renal and bladder fibrosis and in the preservation of renal and bladder structures.
Angiotensin-Converting Enzyme Inhibitors/pharmacology ; Animals ; Captopril/*pharmacology ; Disease Models, Animal ; Estrogen Antagonists/pharmacology ; Free Radical Scavengers/pharmacology ; Hydroxymethylglutaryl-CoA Reductase Inhibitors/pharmacology ; Kidney/*drug effects/pathology ; Male ; Pentoxifylline/*pharmacology ; Rats ; Simvastatin/*pharmacology ; Tamoxifen/*pharmacology ; Urethral Obstruction/*drug therapy ; Urinary Bladder Neck Obstruction/*drug therapy