Skin rejuvenation with microthermal fractional photothermolysis

ABSTRACT:  Fractional resurfacing is gaining acceptance as a preferred method for skin resurfacing. Experience in treating photoaging, acne scars, and melasma is reviewed.     

复合维生素E,C,B组合物面膜治疗寻常痤疮117例的疗效和安全性(英文)

目的:了解维生素E,C,B组合物面膜治疗寻常痤疮的疗效及安全性。方法:117例13a以上、痤疮严重程度分级在2级以上且主要表现于脸部的病人,予维生素E,C,B组合物面膜治疗,每日1次,共8wk。观察治疗前后痤疮数量及性质,包括粉刺、丘疹、脓疱及囊肿之数目,并评估整体疗效。结果:治疗后,粉刺、丘疹、脓疱及囊肿数目下降了13±s13,10±12,5±7及3±3,均P<0.01。7例(6.0%)病人症状完全改善,44例(37.6%)中度改善,56例(47.9%)轻度改善,10例(8.6%)无改善。59例(50.4%)病人无红肿、搔痒、灼热及脱皮等现象发生。结论:维生素E,C,B组合物面膜治疗痤疮有效,超过半数的受试者无不良反应发生,可作为传统治疗寻常痤疮药物的替代。     

用人工合成材料的吊带经耻骨固定或经腹壁固定治疗真性女性压力性尿失禁

目的总结用人工合成材料的吊带经不同的途径治疗女性压力性尿失禁的方法和结果。方法采用人工合成材料的吊带经耻骨固定（In—Fast）技术治疗3例，用经腹壁固定（TVT和IVS）技术治疗13例。结果绝大多数病人均排尿通畅．无尿失禁复发。但TVT组有1例排尿不畅，3个月后剪断吊带后变为轻度尿失禁。In-fast组有1例性交不适伴阴道分泌物增加。结论用人工合成材料的吊带进行悬吊技术治疗女性真性压力性尿失禁是安全、微创和有效的手术方式。经耻骨固定技术和用经腹壁固定技术这两种方法各有自己的优缺点。应根据病人的具体情况去选择使用。     

The effectiveness of intermittent isotretinoin treatment in mild or moderate acne

BACKGROUND: Isotretinoin is the only drug that affects almost all factors in acne pathogenesis. Recently, its use for the treatment of chronic mild or moderate acne unresponsive to long-term antibiotic therapy, and with a tendency to cause scarring and leading to negative psychological effects, has became popular. The aim of the study was to investigate the effectiveness of intermittent isotretinoin treatment in mild or moderate acne. METHODS: Sixty patients with mild or moderate acne localized to the face were enrolled in the study. The treatment regimen consisted of isotretinoin, 0.5-0.75 mg/kg per day, applied for 1 week every 4 weeks for a total period of 6 months, according to the degree of acne and number of inflammatory lesions. RESULTS: Forty-one (68.3%) of the 60 patients completed the 6-month therapy. At the end of the treatment complete improvement was observed in 34 patients (82.9%) out of 41. All adverse effects were mild and discontinuation of the treatment was not necessary. CONCLUSION: Intermittent isotretinoin treatment was found to be a safe and effective choice for patients with mild or moderate acne.     

Reinnervation of cat pacinian corpuscles after nerve crush

The reinnervation pattern of crural pacinian corpuscles was examined by light and electron microscopy in eight adult cats of both sexes 3–18 months after sciatic nerve crush. Normal pacinian corpuscles are each supplied with a single myelinated axon and a single cylindrical axon terminal which may branch in the distal part of the inner core. Reinnervation of these vibroreceptors was very satisfactory after sciatic nerve crush: in a sample of 68 corpuscles examined 3–18 months after the operation, 92.6% were found reinnervated, while only 7.4% remained denervated. At the nerve entry, 84.2% of the reinnervated corpuscles were supplied with a single myelinated axon, while 15.8% received two myelinated axons; some of the axons branched before or after entering the inner core. Near the mid-level of the inner core, 60.3% of 63 reinnervated corpuscles were innervated with a single axon terminal, 22.2% were biterminal, while 17.5% had three or more terminals. Regenerated axon terminals induced the formation of thin lamellar layers in the axial region of the original core and, exceptionally, also at the outer aspect of the original core. In monoterminal corpuscles, the shape and ultrastructure of regenerated endings resembled those of normal controls, whereas in multiterminal corpuscles their shape and profiles were variable. In contrast to previous reports, reinnervated corpuscles did not ultimately become monoterminal. On the contrary, the mean number of 1.3 terminals found in reinnervated crural corpuscles at 3–5 months increased to 1.9 terminals per corpuscle 6–18 months after axotomy. Received: 1 July 1996 / Revised, accepted: 30 September 1996     

中西医结合治疗寻常性痤疮的临床观察

目的 :探讨中西医结合治疗寻常性痤疮的临床疗效。方法 :将 10 5例寻常性痤疮患者随机分为中西医结合治疗组和西药治疗对照组 ,分别应用中西药结合治疗和西药治疗 ,治疗后观察两组的临床疗效及皮损变化情况。结果 :中西医结合治疗组痊愈率、显效率及皮损消退情况显著高于西药治疗对照组 (P <0 .0 5 ,P <0 .0 1)。结论 :中西医结合治疗寻常性痤疮有较好的临床效果。     

A rare case of nasopharyngeal angiofibroma in an elderly female

Nasopharyngeal angiofibromas occur predominantly in males in their puberty and adolescence; the incidence in other age groups and in women is exceptional. This report describes a case of a 57-year-old woman with nasopharyngeal angiofibroma presenting typical radiological findings in computed tomography, MR imaging and angiography. The tumour was successfully removed and histopathological examination confirmed the diagnosis. In 6 years follow-up the patient is free of symptoms.     

The Changes in the Hypothalamo-Pituitary-Gonadal Axis of Streptozotocin-Treated Male Rats Depend from Age at Diabetes Onset

The influence of age at diabetes onset and of capillary microangiopathy on the severity and evolution of hypothalamo-pituitary-gonadal changes was studied morphologically and morphometrically in male rats 4 and 8 months after streptozotocin injection. At each time period we studied 2 groups of rats, one made diabetic before (age 1 month), the other after puberty (age 3 months), and compared them with corresponding controls. The size of hypothalamic axons, numerical density and size of pituitary gonadotrophs, size of testicular tubules, and basement membrane thickness of retinal capillaries were measured. Major differences were found at 8 months. Changes of pituitary glands (i.e. small and numerous gonadotrophs) and testes (i.e. small tubular size) were more important in pre- than in postpubertal diabetic rats. This was a consequence of the aggravating prepubertal diabetes between 4 and 8 months. On the contrary, these changes partially regressed in postpubertal diabetic animals. Pituitary and testicular changes were correlated. Other lesions, such as swollen axonal processes in the hypothalamus, increased thickness of seminiferous epithelium and of capillary basement membranes, though very evident in diabetics, were independent from age at induction. Neither microangiopathy nor glycemia were correlated with any other change which confirmed their secondary role in diabetic neuroendocrine disorders. Thus, two types of diabetic disorders of the hypothalamo-pituitary-gonadal axis could be distinguished: 1) those with irreversible effects on immature yet partially reversible effects on mature structures; and 2) those independent from age at induction.     

Sex differences in plasma cocaine levels and subjective effects after acute cocaine administration in human volunteers

Gender differences after acute cocaine administration have received little attention in spite of the fact that males and females respond differently to many drugs. Seven male and seven female occasional cocaine users received both an intranasal dose of cocaine hydrochloride (0.9 mg/kg) and placebo powder in a randomized order and reported subjective effects via an instrumental joystick device and various questionnaires. Blood samples were withdrawn at 5-min intervals to assess pharmacokinetic differences. Male subjects achieved the highest peak plasma cocaine levels (144.4 ± 17.5 ng/ml), detected cocaine effects significantly faster than females and also experienced a greater number of episodes of intense good and bad effects. Women studied during the follicular phase of their menstrual cycle had peak plasma cocaine levels of 73.2 ± 9.9 ng/ml, which was significantly higher than when they were studied during their luteal phase (54.7 ± 8.7 ng/ml), but there were no differences in their subjective reports of cocaine effects. In spite of the different cocaine blood levels and subjective effects, peak heart rate increases did not differ between males and females suggesting that women may be more sensitive than males to the cardiovascular effects of cocaine. These data suggest that there are significant gender and menstrual cycle differences in the response to acute intranasal cocaine administration and these differences may have implications for the differential abuse of this drug.This paper is dedicated to Xavier Lamas, MD, PhD, who lost his life while ascending Mt. Everest, August 1995     

The effects of photoperiod on olfactory c-fos expression in prairie voles,Microtus ochrogaster

Reproduction stops among the majority of prairie voles (Microtus ochrogaster) during the winter. Short day lengths suppress male reproductive function dramatically in the laboratory, but photoperiod exerts only subtle effects on female reproductive function. Thus, the regulation of seasonal breeding in this species remains partially unspecified. In contrast to commonly studied rodents, female prairie voles do not undergo spontaneous estrous cycles; rather, they are induced into estrus by exposure to chemosignals expressed in conspecific male urine. In the present study, the hypothesis was tested that seasonal breeding among female prairie voles in the field reflects photoperiod-mediated changes in the responsiveness of the chemosensory system to male urine. Responsiveness was assessed by localizing the product of the c-fos immediate early gene with an immunocytochemical procedure. Female prairie voles were maintained in either long (LD 16:8) or short (LD 8:16) photoperiods from birth until adulthood, and exposed to either male urine or skim milk. Immunocytochemistry forfos protein revealed an increased number of immunoreactive cells within the accessory olfactory system of female prairie voles, including the accessory olfactory bulbs, granule cell layer, as well as the medial and cortical divisions of the amygdala 1 h after exposure to a single drop of urine as compared to individuals exposed to skim milk. The number of immunoreactivefos cells induced in females by conspecific male urine was also affected by photoperiod; short day females displayed fewer immunoreactivefos neurons in the accessory olfactory system as compared to long-day animal. Taken together, these results indicate that similar mechanisms underlie the responses of different rodent species to the chemosignals of conspecifics and that the pattern offos expression observed in the present study has functional significance for the regulation of reproduction in prairie voles.