During radiation for head and neck cancers,part of parotids are contained in planning target volume(PTV),which lead to parotids receiving radiation as the same as PTV.Radiation for head and neck cancers will influence the parotids.In the period of radiation,many factors will influence parotids,such as age,primary parotid volume,V10-40,weight and mean radiation dose et al.These factors will result in that the parotid volume reduces nearly 50％ and moves toward the middle line of the body.As a result,the real dose of the parotid receiving is higher than prescription dose.The excretion function of the parotid will be severely damaged after radiation,which will lead to xerostomia and influence the quality of patients life.

Many specific therapeutic antibody drugs have been developed for different indications. In drug development, it has been found that the antibody isotype framework can not only affect the physical and chemical properties of therapeutic antibodies, but also influence the activity and therapeutic effect. As a result, IgG isotype selection should be considered carefully in antibody drug development strategies. Because of the unique biological characteristics, IgG4 isotype has been used in some therapeutic antibodies for which effector functions are not desired. In order to provide new ideas for the development of antibody drugs, the research and application progress of IgG4 isotype in therapeutic antibody drug development has been reviewed.
Drug Design ; Humans ; Immunoglobulin G ; chemistry ; pharmacology

OBJECTIVE:To provide reference for the price management of medicines in Chinese mainland by inquiring into rel-ative management in Hong Kong. METHODS:Based on the steps of price management and the value chain of medicines in Hong Kong,the management mechanism of medicine pricing,circulation and compensation were researched. RESULTS & CONCLU-SIONS:The prices of the medicines in Hong Kong are mainly determined by the tender between Hospital Authority and the pharma-ceutical suppliers. In circulation,medicine payer as main body in bidding and purchase conducthigh qualitybidding andmasspurchase,and price remained the same in public hospital. On the basis of the purchase price,the price that actually paid by pa-tients is the result of government compensation. Chinese mainland can draw lessons from such drug bidding mode in Hong Kong which will lead health care department to act as the main body in bidding,weaken the relationship between the hospitals and the drug dealers or manufacturers,and expand the government's financial investment in public medical institutions to improve reim-bursement.

OBJECTIVE:To explore price management mechanism of medical service in Macau of China,and to provide refer-ence for the formulation of price management mechanism of medical service in the mainland area of China. METHODS:From two key links of pricing and compensation,price management mechanism of medical service in Macau was introduced. RESULTS &CONCLUSIONS:In respect of pricing,Macau Health Bureau as pricing subject set up guide price for public health institutions by marginal cost pricing,which focused on technology value and labor value of medical staff,and graded pricing for health institu-tions at various levels. In respect of compensation,compensation subjects included government,social security funds,charitable or-ganization,etc. The government provided fixed-rate compensation for citizen by allocating funds for public health institutions,so as to improve compensation level for primary health institutions. The social security funds extended sick benefit to insured patients, and compensated patients at fixed rate. Charitable organization subsidized private health institutions to reduce medical service price. Finally,actual price has been formulated through pricing and compensation links,and the experience is worthy of learning by the mainland of China.

Rhamnolipid,an important biosurfactant,is reviewed with respect to chemical strocture,properties,physiological role and their fermentation production,especially focusing on the production with inexpensive raw materials,such as vegetable oils and residues from agro- industrial wastes.This can not only reduce the production costs,but also contribute to the reduction of environmental impact generated by the discard of residues,and the treatment costs.

Objective To report the clinical outcome of dual plating in treating humeral intercondylar fractures. Methods From February 2002 to June 2003, 22 cases of humeral intercondylar fractures were treated with dual plating. It involved 15 males and 7 females, whose average age was 42.2 years with a range from 19 to 67 years. According to the AO classification, 5 cases were of type C1, 11 of C2 and 6 of C3. The posterior midline approach was selected, and the intercondylar fracture ends were exposed through the trans-olecranon osteotomy. The intercondylar fragments were fixed first, in 6 cases with C3 type fractures, the auto-grafting from the iliac bone was performed because of comminution, then the supracondylar fracture was fixed with dual plating. The semi-tubular plates was applied on the medial epicondylar crest of the humerus; and the reconstruction plate was implanted on the postero-lateral side, the two plates were kept in 90? with each other. The osteotomized ends were fixed with tension band. Results All the 22 patients were followed up for 13-29 months ( mean, 20.2 months ). By the end of the first postoperative month, the elbow flexion averaged 86.2?( range, 80?-105?), and the loss of extension averaged 40.7?(range, 30?-45?). But at the 12th month, the flexion improved to 117?(range, 95?-135?), and the extension loss decreased to 23.2?( range, 10?-35?). The averaged union time was 15.7 weeks with a range of 12 to 20 weeks. Assessed by the Jupiter scoring system, 3 cases were rated as excellent, 15 as good and 4 as fair. Complications included 4 cases of incision exudation, 3 K-wires withdrawal, 1 ulnar neuropathy and 3 heterotopic ossification. But no incision necrosis, deep infection, loosening or breakage of the internal fixators occurred. Conclusion The dual plating is able to provide stable and durable fixation for the humeral intercondylar fractures. In addition, it can prevent malunion or nonunion effectively, and decrease the related complications significantly. This method is helpful to improve the functional recovery of the elbow joint satisfactorily.

AIM: To establish HPLC fingerprint to make the difference between pre-and post processed Radix et Rhizoma Gentiana rigescen with wine-fried method. METHODS: Chromatographic fingerprint between pre-and post processed Radix et Rhizoma Gentiana rigescen with wine-fried was investigated by RP-HPLC and the gradient elution with acetonitrile and 0.1% phosphoric acid was applied to chromatographic separation(Alltima C_18(4.6 mm ?250 mm,5 ?m) column) for 65 min,and detection wavelength of 225 nm.Data were analysed by fingerprint similarity evaluation software to compare the similarity among the samples. RESULTS: The similitude degree of the10 batches of pre-and post processed Radix et Rhizoma Gentiana rigescen with wine-fried method were between 0.935-0.997 and 0.964-0.999,respectively.Comparing with the common processing of the HPLC fingerprint of Radix et Rhizoma Gentiana rigescen,the similarity of Radix et Rhizoma Gentiana rigescen processed with wine-fried was greater than 0.900. CONCLUSION: There have no significant deviation between semipolarity components of the pre-and post processed Radix et Rhizoma Gentiana rigescen with wine-fried method. The proportion of the main relative peak area has changed.

OBJECTIVE:To provide reference for improving the rational drug use of China. METHODS:By referring to In-dia,South Africa and Argentina's policy in this regard,the rational drug policy rules and supporting measures in the national drug policy of these states were analyzed and summarized to put forward related policies for China. RESULTS & CONCLUSIONS:Pro-moting the rational drug use required multi-angle managements towards the supply-side,the demand-side as well as third-party, and relevant supporting measures needed to be improved. Firstly,the managements on the supply-side is particularly important,in-cluding measures such as strengthening prescription management,formulating and implementing the standard treatment guidelines, intensifing the functions of pharmacists,establishing serious irrational drug use and specific diseases medication management sys-tem;then,the demand-side needs the investigation and feedback about the patients with drug use to eliminate irrational drug use, and through the internet and other media to raise public awareness of the medicine information as well;besides,the third-party needs to establish a non-profit organization to regulate pharmaceutical advertisements,and increase information about rational drug use;finally,improving the rational drug policy also needs to improve needs to promote the separation of medicine,reform Medi-care payment and other supporting measures.

The reimbursement on high-value drug expenses for patients is an important approach of catastrophic disease medical insurance.Hong Kong has established in a drug safety network, that has achieved remarkable results in improving the accessibility to high-value drugs and the burden of disease and effectively alleviated patients' financial burden.This paper systematically analyzes the history, process of adding drugs to directory, application conditions for drugs and patients, development status, and characteristics of drug safety network in Hong Kong.This study points out that although Mainland China has gradually established the high-value drug directory for catastrophic disease through the method of drug negotiation, the mechanism of high-value drug directory is not mature yet.To achieve the convergence between high-value drug directory, basic medical insurance drug directory, and new rural cooperative medical scheme drug directory, Mainland China needs to: 1) First, learn from the drug safety network in Hong Kong and establish access and exist mechanism for high-value drug directory;2) Then, expand insurance coverage of high-value drugs by establishing a multi-channel and socialized financing mechanism;3) Finally, strengthen the major disease medical insurance by adhering to the principles of buying drugs and getting drugs for free and reforming the fixed-ratio-reimbursement model.

Aim To study the effect of Radix Tetrastig-ma Hemsleyani Flavone ( RTHF ) on the proliferation and invasion in lung carcinoma A549 cells as well as the possible mechanisms underlying these processes. Methods A549 cells were treated with different con-centrations of RTHF for different time. MTT assay and colone formation assay were used to detect the ability of cell proliferation. Wound healing methods and tran-swell chamber assay were adopted to determine cell mi-gration and invasion. Western blotting assay was used to detect the expression of metastasis-related proteins MMP-2 , MMP-9 , and TIMP-2 . Results RTHF obvi-ously suppressed the proliferation of A549 cells in a dose-and time-dependent manner. Microscope found an apparent decrease of cells in the denude zone of cell migration and transwell testing results show that the treatment of invasion was significantly lower than the proportion in the control group ( P <0. 01 ) . The pro-tein expressions of MMP-2 and MMP-9 were down-reg-ulated and that of TIMP-2 was up-regulated in a dose-dependent manner. Conclusion RTHF inhibits the growth and invasion of lung carcinoma A549 cells, which might be achieved by down-regulating the ex-pressions of MMP-2 and MMP-9 protein.